Move STATIC_ASSERTs to .pb.c file.

This way the .pb.h will remain cleaner and easier to read.

.gitignore

@@ -0,0 +1,39 @@
+*.gcda
+*.gcno
+*.gcov
+*.o
+*.pb.c
+*.pb.h
+*.pb
+*~
+*.tar.gz
+julkaisu.txt
+docs/*.html
+docs/generator_flow.png
+example/client
+example/server
+example_avr_double/decode_double
+example_avr_double/encode_double
+example_avr_double/test_conversions
+example_unions/decode
+example_unions/encode
+generator/nanopb_pb2.pyc
+tests/decode_unittests
+tests/encode_unittests
+tests/test_compiles
+tests/test_decode1
+tests/test_decode2
+tests/test_decode3
+tests/test_decode3_buf
+tests/test_decode_callbacks
+tests/test_encode1
+tests/test_encode2
+tests/test_encode3
+tests/test_encode3_buf
+tests/test_encode_callbacks
+tests/test_missing_fields
+tests/test_multiple_files
+tests/bc_decode
+tests/bc_encode
+tests/breakpoints
+

CHANGELOG

@@ -0,0 +1,64 @@
+git master
+ Fixed error message bugs (issues 52, 56)
+ Sanitize #ifndef filename (issue 50)
+ Performance improvements
+ Add compile-time option PB_BUFFER_ONLY
+ Add Java package name to nanopb.proto
+ Check for sizeof(double) == 8 (issue 54)
+ Added generator option to ignore some fields. (issue 51)
+ Added generator option to make message structs packed. (issue 49)
+ Add more test cases.
+
+nanopb-0.1.8
+ Fix bugs in the enum short names introduced in 0.1.7 (issues 42, 43)
+ Fix STATIC_ASSERT macro when using multiple .proto files. (issue 41)
+ Fix missing initialization of istream.errmsg
+ Make tests/Makefile work for non-gcc compilers (issue 40)
+
+nanopb-0.1.7
+ Remove "skip" mode from pb_istream_t callbacks. Example implementation had a bug. (issue 37)
+ Add option to use shorter names for enum values (issue 38)
+ Improve options support in generator (issues 12, 30)
+ Add nanopb version number to generated files (issue 36)
+ Add extern "C" to generated headers (issue 35)
+ Add names for structs to allow forward declaration (issue 39)
+ Add buffer size check in example (issue 34)
+ Fix build warnings on MS compilers (issue 33)
+
+nanopb-0.1.6
+ Reorganize the field decoder interface (issue 2)
+ Improve performance in submessage decoding (issue 28)
+ Implement error messages in the decoder side (issue 7)
+ Extended testcases (alltypes test is now complete).
+ Fix some compiler warnings (issues 25, 26, 27, 32).
+
+nanopb-0.1.5
+ Fix bug in decoder with packed arrays (issue 23).
+ Extended testcases.
+ Fix some compiler warnings.
+
+nanopb-0.1.4
+ Add compile-time options for easy-to-use >255 field support.
+ Improve the detection of missing required fields.
+ Added example on how to handle union messages.
+ Fix generator error with .proto without messages.
+ Fix problems that stopped the code from compiling with some compilers.
+ Fix some compiler warnings.
+
+nanopb-0.1.3
+ Refactor the field encoder interface.
+ Improve generator error messages (issue 5)
+ Add descriptor.proto into the #include exclusion list
+ Fix some compiler warnings.
+
+nanopb-0.1.2
+ Make the generator to generate include for other .proto files (issue 4).
+ Fixed generator not working on Windows (issue 3)
+
+nanopb-0.1.1
+ Fixed bug in encoder with 'bytes' fields (issue 1).
+ Fixed a bug in the generator that caused a compiler error on sfixed32 and sfixed64 fields.
+ Extended testcases.
+
+nanopb-0.1.0
+ First stable release.

README

@@ -5,5 +5,7 @@ Homepage: http://kapsi.fi/~jpa/nanopb/
 To compile the library, you'll need these libraries:
 protobuf-compiler python-protobuf libprotobuf-dev
 
+The only runtime dependencies are memset() and memcpy().
+
 To run the tests, run make under the tests folder.
 If it completes without error, everything is fine.

docs/concepts.rst

@@ -38,6 +38,20 @@ This file, in turn, requires the file *google/protobuf/descriptor.proto*. This i
 
     protoc -I/usr/include -Inanopb/generator -I. -omessage.pb message.proto
 
+The options can be defined in file, message and field scopes::
+
+    option (nanopb_fileopt).max_size = 20; // File scope
+    message Message
+    {
+        option (nanopb_msgopt).max_size = 30; // Message scope
+        required string fieldsize = 1 [(nanopb).max_size = 40]; // Field scope
+    }
+
+It is also possible to give the options on command line, but then they will affect the whole file. For example::
+
+    user@host:~$ python ../generator/nanopb_generator.py -s 'max_size: 20' message.pb
+
+
 Streams
 =======
 
@@ -50,6 +64,7 @@ There are a few generic rules for callback functions:
 #) Use state to store your own data, such as a file descriptor.
 #) *bytes_written* and *bytes_left* are updated by pb_write and pb_read.
 #) Your callback may be used with substreams. In this case *bytes_left*, *bytes_written* and *max_size* have smaller values than the original stream. Don't use these values to calculate pointers.
+#) Always read or write the full requested length of data. For example, POSIX *recv()* needs the *MSG_WAITALL* parameter to accomplish this.
 
 Output streams
 --------------
@@ -91,9 +106,8 @@ Writing to stdout::
 
 Input streams
 -------------
-For input streams, there are a few extra rules:
+For input streams, there is one extra rule:
 
-#) If buf is NULL, read from stream but don't store the data. This is used to skip unknown input.
 #) You don't need to know the length of the message in advance. After getting EOF error when reading, set bytes_left to 0 and return false. Pb_decode will detect this and if the EOF was in a proper position, it will return true.
 
 Here is the structure::
@@ -258,18 +272,14 @@ generates this field description array for the structure *Person_PhoneNumber*::
 Return values and error handling
 ================================
 
-Most functions in nanopb return bool: *true* means success, *false* means failure. If this is enough for you, skip this section.
+Most functions in nanopb return bool: *true* means success, *false* means failure. There is also some support for error messages for debugging purposes: the error messages go in *stream->errmsg*.
 
-For simplicity, nanopb doesn't define it's own error codes. This might be added if there is a compelling need for it. You can however deduce something about the error causes:
+The error messages help in guessing what is the underlying cause of the error. The most common error conditions are:
 
 1) Running out of memory. Because everything is allocated from the stack, nanopb can't detect this itself. Encoding or decoding the same type of a message always takes the same amount of stack space. Therefore, if it works once, it works always.
 2) Invalid field description. These are usually stored as constants, so if it works under the debugger, it always does.
-3) IO errors in your own stream callbacks. Because encoding/decoding stops at the first error, you can overwrite the *state* field in the struct and store your own error code there.
+3) IO errors in your own stream callbacks.
-4) Errors that happen in your callback functions. You can use the state field in the callback structure.
+4) Errors that happen in your callback functions.
 5) Exceeding the max_size or bytes_left of a stream.
 6) Exceeding the max_size of a string or array field
-7) Invalid protocol buffers binary message. It's not like you could recover from it anyway, so a simple failure should be enough.
+7) Invalid protocol buffers binary message.
-
-In my opinion, it is enough that 1. and 2. can be resolved using a debugger.
-
-However, you may be interested which of the remaining conditions caused the error. For 3. and 4., you can set and check the state. If you have to detect 5. and 6., you should convert the fields to callback type. Any remaining problem is of type 7.

docs/reference.rst

@@ -6,6 +6,30 @@ Nanopb: API reference
 
 .. contents ::
 
+Compilation options
+===================
+The following options can be specified using -D switch given to the C compiler:
+
+============================  ================================================================================================
+__BIG_ENDIAN__                 Set this if your platform stores integers and floats in big-endian format.
+                               Mixed-endian systems (different layout for ints and floats) are currently not supported.
+NANOPB_INTERNALS               Set this to expose the field encoder functions that are hidden since nanopb-0.1.3.
+PB_MAX_REQUIRED_FIELDS         Maximum number of required fields to check for presence. Default value is 64. Increases stack
+                               usage 1 byte per every 8 fields. Compiler warning will tell if you need this.
+PB_FIELD_16BIT                 Add support for tag numbers > 255 and fields larger than 255 bytes or 255 array entries.
+                               Increases code size 3 bytes per each field. Compiler error will tell if you need this.
+PB_FIELD_32BIT                 Add support for tag numbers > 65535 and fields larger than 65535 bytes or 65535 array entries.
+                               Increases code size 9 bytes per each field. Compiler error will tell if you need this.
+PB_NO_ERRMSG                   Disables the support for error messages; only error information is the true/false return value.
+                               Decreases the code size by a few hundred bytes.
+PB_BUFFER_ONLY                 Disables the support for custom streams. Only supports encoding to memory buffers.
+                               Speeds up execution and decreases code size slightly.
+============================  ================================================================================================
+
+The PB_MAX_REQUIRED_FIELDS, PB_FIELD_16BIT and PB_FIELD_32BIT settings allow raising some datatype limits to suit larger messages.
+Their need is recognized automatically by C-preprocessor #if-directives in the generated .pb.h files. The default setting is to use
+the smallest datatypes (least resources used).
+
 pb.h
 ====
 
@@ -66,7 +90,7 @@ Describes a single structure field with memory position in relation to others. T
 :array_size:    Maximum number of entries in an array, if it is an array type.
 :ptr:           Pointer to default value for optional fields, or to submessage description for PB_LTYPE_SUBMESSAGE.
 
-The *uint8_t* datatypes limit the maximum size of a single item to 255 bytes and arrays to 255 items. Compiler will warn "Initializer too large for type" if the limits are exceeded. The types can be changed to larger ones if necessary.
+The *uint8_t* datatypes limit the maximum size of a single item to 255 bytes and arrays to 255 items. Compiler will give error if the values are too large. The types can be changed to larger ones by defining *PB_FIELD_16BIT*.
 
 pb_bytes_array_t
 ----------------
@@ -283,15 +307,32 @@ Read data from input stream. Always use this function, don't try to call the str
 
 End of file is signalled by *stream->bytes_left* being zero after pb_read returns false.
 
-pb_decode_varint
+pb_decode
+---------
+Read and decode all fields of a structure. Reads until EOF on input stream. ::
+
+    bool pb_decode(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct);
+
+:stream:        Input stream to read from.
+:fields:        A field description array. Usually autogenerated.
+:dest_struct:   Pointer to structure where data will be stored.
+:returns:       True on success, false on IO error, on detectable errors in field description, if a field encoder returns false or if a required field is missing.
+
+In Protocol Buffers binary format, EOF is only allowed between fields. If it happens anywhere else, pb_decode will return *false*. If pb_decode returns false, you cannot trust any of the data in the structure.
+
+In addition to EOF, the pb_decode implementation supports terminating a message with a 0 byte. This is compatible with the official Protocol Buffers because 0 is never a valid field tag.
+
+For optional fields, this function applies the default value and sets *has_<field>* to false if the field is not present.
+
+pb_decode_noinit
 ----------------
-Read and decode a varint_ encoded integer. ::
+Same as `pb_decode`_, except does not apply the default values to fields. ::
 
-    bool pb_decode_varint(pb_istream_t *stream, uint64_t *dest);
+    bool pb_decode_noinit(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct);
 
-:stream:        Input stream to read from. 1-10 bytes will be read.
+(parameters are the same as for `pb_decode`_.)
-:dest:          Storage for the decoded integer. Value is undefined on error.
+
-:returns:       True on success, false if value exceeds uint64_t range or an IO error happens.
+The destination structure should be filled with zeros before calling this function. Doing a *memset* manually can be slightly faster than using `pb_decode`_ if you don't need any default values.
 
 pb_skip_varint
 --------------
@@ -311,67 +352,66 @@ Skip a varint-length-prefixed string. This means skipping a value with wire type
 :stream:        Input stream to read from.
 :returns:       True on success, false on IO error or length exceeding uint32_t.
 
-pb_decode
+pb_decode_tag
----------
+-------------
-Read and decode all fields of a structure. Reads until EOF on input stream. ::
+Decode the tag that comes before field in the protobuf encoding::
 
-    bool pb_decode(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct);
+    bool pb_decode_tag(pb_istream_t *stream, pb_wire_type_t *wire_type, int *tag, bool *eof);
 
 :stream:        Input stream to read from.
-:fields:        A field description array. Usually autogenerated.
+:wire_type:     Pointer to variable where to store the wire type of the field.
-:dest_struct:   Pointer to structure where data will be stored.
+:tag:           Pointer to variable where to store the tag of the field.
-:returns:       True on success, false on IO error, on detectable errors in field description, if a field encoder returns false or if a required field is missing.
+:eof:           Pointer to variable where to store end-of-file status.
+:returns:       True on success, false on error or EOF.
 
-In Protocol Buffers binary format, EOF is only allowed between fields. If it happens anywhere else, pb_decode will return *false*. If pb_decode returns false, you cannot trust any of the data in the structure.
+When the message (stream) ends, this function will return false and set *eof* to true. On other
+errors, *eof* will be set to false.
 
-In addition to EOF, the pb_decode implementation supports terminating a message with a 0 byte. This is compatible with the official Protocol Buffers because 0 is never a valid field tag.
+pb_skip_field
-
-For optional fields, this function applies the default value and sets *has_<field>* to false if the field is not present.
-
-Because of memory concerns, the detection of missing required fields is not perfect if the structure contains more than 32 fields.
-
-.. sidebar:: Field decoders
-    
-    The functions with names beginning with *pb_dec_* are called field decoders. Each PB_LTYPE has an own field decoder, which handles translating from Protocol Buffers data to C data.
-
-    Each field decoder reads and decodes a single value. For arrays, the decoder is called repeatedly.
-
-    You can use the decoders from your callbacks. Just be aware that the pb_field_t passed to the callback is not directly compatible 
-    with the *varint* field decoders. Instead, you must create a new pb_field_t structure and set the data_size according to the data type 
-    you pass to *dest*, e.g. *field.data_size = sizeof(int);*. Other fields in the *pb_field_t* don't matter.
-
-    The field decoder interface is a bit messy as a result of the interface required inside the nanopb library.
-    Eventually they may be replaced by separate wrapper functions with a more friendly interface.
-
-pb_dec_varint
 -------------
-Field decoder for PB_LTYPE_VARINT. ::
+Remove the data for a field from the stream, without actually decoding it::
 
-    bool pb_dec_varint(pb_istream_t *stream, const pb_field_t *field, void *dest)
+    bool pb_skip_field(pb_istream_t *stream, pb_wire_type_t wire_type);
+
+:stream:        Input stream to read from.
+:wire_type:     Type of field to skip.
+:returns:       True on success, false on IO error.
+
+.. sidebar:: Decoding fields manually
+    
+    The functions with names beginning with *pb_decode_* are used when dealing with callback fields. The typical reason for using callbacks is to have an array of unlimited size. In that case, `pb_decode`_ will call your callback function repeatedly, which can then store the values into e.g. filesystem in the order received in.
+
+    For decoding numeric (including enumerated and boolean) values, use `pb_decode_varint`_, `pb_decode_svarint`_, `pb_decode_fixed32`_ and `pb_decode_fixed64`_. They take a pointer to a 32- or 64-bit C variable, which you may then cast to smaller datatype for storage.
+
+    For decoding strings and bytes fields, the length has already been decoded. You can therefore check the total length in *stream->bytes_left* and read the data using `pb_read`_.
+
+    Finally, for decoding submessages in a callback, simply use `pb_decode`_ and pass it the *SubMessage_fields* descriptor array.
+
+pb_decode_varint
+----------------
+Read and decode a varint_ encoded integer. ::
+
+    bool pb_decode_varint(pb_istream_t *stream, uint64_t *dest);
 
 :stream:        Input stream to read from. 1-10 bytes will be read.
-:field:         Field description structure. Only *field->data_size* matters.
+:dest:          Storage for the decoded integer. Value is undefined on error.
-:dest:          Pointer to destination integer. Must have size of *field->data_size* bytes.
+:returns:       True on success, false if value exceeds uint64_t range or an IO error happens.
-:returns:       True on success, false on IO errors or if `pb_decode_varint`_ fails.
 
-This function first calls `pb_decode_varint`_. It then copies the first bytes of the 64-bit result value to *dest*, or on big endian architectures, the last bytes.
+pb_decode_svarint
+-----------------
+Similar to `pb_decode_varint`_, except that it performs zigzag-decoding on the value. This corresponds to the Protocol Buffers *sint32* and *sint64* datatypes. ::
 
-pb_dec_svarint
+    bool pb_decode_svarint(pb_istream_t *stream, int64_t *dest);
---------------
-Field decoder for PB_LTYPE_SVARINT. Similar to `pb_dec_varint`_, except that it performs zigzag-decoding on the value. ::
 
-    bool pb_dec_svarint(pb_istream_t *stream, const pb_field_t *field, void *dest);
+(parameters are the same as `pb_decode_varint`_)
 
-(parameters are the same as `pb_dec_varint`_)
+pb_decode_fixed32
+-----------------
+Decode a *fixed32*, *sfixed32* or *float* value. ::
 
-pb_dec_fixed32
+    bool pb_decode_fixed32(pb_istream_t *stream, void *dest);
---------------
-Field decoder for PB_LTYPE_FIXED32. ::
-
-    bool pb_dec_fixed32(pb_istream_t *stream, const pb_field_t *field, void *dest);
 
 :stream:        Input stream to read from. 4 bytes will be read.
-:field:         Not used.
 :dest:          Pointer to destination *int32_t*, *uint32_t* or *float*.
 :returns:       True on success, false on IO errors.
 
@@ -379,9 +419,9 @@ This function reads 4 bytes from the input stream.
 On big endian architectures, it then reverses the order of the bytes.
 Finally, it writes the bytes to *dest*.
 
-pb_dec_fixed64
+pb_decode_fixed64
---------------
+-----------------
-Field decoder for PB_LTYPE_FIXED64. ::
+Decode a *fixed64*, *sfixed64* or *double* value. ::
 
     bool pb_dec_fixed(pb_istream_t *stream, const pb_field_t *field, void *dest);
 
@@ -390,53 +430,28 @@ Field decoder for PB_LTYPE_FIXED64. ::
 :dest:          Pointer to destination *int64_t*, *uint64_t* or *double*.
 :returns:       True on success, false on IO errors.
 
-Same as `pb_dec_fixed32`_, except this reads 8 bytes.
+Same as `pb_decode_fixed32`_, except this reads 8 bytes.
 
-pb_dec_bytes
+pb_make_string_substream
-------------
+------------------------
-Field decoder for PB_LTYPE_BYTES. Reads a length-prefixed block of bytes. ::
+Decode the length for a field with wire type *PB_WT_STRING* and create a substream for reading the data. ::
 
-    bool pb_dec_bytes(pb_istream_t *stream, const pb_field_t *field, void *dest);
+    bool pb_make_string_substream(pb_istream_t *stream, pb_istream_t *substream);
 
-**Note:** This is an internal function that is not useful in decoder callbacks. To read bytes fields in callbacks, use 
+:stream:        Original input stream to read the length and data from.
-*stream->bytes_left* and `pb_read`_.
+:substream:     New substream that has limited length. Filled in by the function.
+:returns:       True on success, false if reading the length fails.
 
-:stream:        Input stream to read from.
+This function uses `pb_decode_varint`_ to read an integer from the stream. This is interpreted as a number of bytes, and the substream is set up so that its `bytes_left` is initially the same as the length, and its callback function and state the same as the parent stream.
-:field:         Field description structure. Only *field->data_size* matters.
-:dest:          Pointer to a structure similar to pb_bytes_array_t.
-:returns:       True on success, false on IO error or if length exceeds the array size.
 
-This function expects a pointer to a structure with a *size_t* field at start, and a variable sized byte array after it. It will deduce the maximum size of the array from *field->data_size*.
+pb_close_string_substream
+-------------------------
+Close the substream created with `pb_make_string_substream`_. ::
 
-pb_dec_string
+    void pb_close_string_substream(pb_istream_t *stream, pb_istream_t *substream);
--------------
-Field decoder for PB_LTYPE_STRING. Reads a length-prefixed string. ::
 
-    bool pb_dec_string(pb_istream_t *stream, const pb_field_t *field, void *dest);
+:stream:        Original input stream to read the length and data from.
-
+:substream:     Substream to close
-**Note:** This is an internal function that is not useful in decoder callbacks. To read string fields in callbacks, use 
-*stream->bytes_left* and `pb_read`_.
-
-:stream:        Input stream to read from.
-:field:         Field description structure. Only *field->data_size* matters.
-:dest:          Pointer to a character array of size *field->data_size*.
-:returns:       True on success, false on IO error or if length exceeds the array size.
-
-This function null-terminates the string when successful. On error, the contents of the destination array is undefined.
-
-pb_dec_submessage
------------------
-Field decoder for PB_LTYPE_SUBMESSAGE. Calls `pb_decode`_ to perform the actual decoding. ::
-
-    bool pb_dec_submessage(pb_istream_t *stream, const pb_field_t *field, void *dest)
-
-**Note:** This is an internal function that is not useful in decoder callbacks. To read submessage fields in callbacks, use 
-`pb_decode`_ directly.
-
-:stream:        Input stream to read from.
-:field:         Field description structure. Only *field->ptr* matters.
-:dest:          Pointer to the destination structure.
-:returns:       True on success, false on IO error or if `pb_decode`_ fails.
-
-The *field->ptr* should be a pointer to *pb_field_t* array describing the submessage.
 
+This function copies back the state from the substream to the parent stream.
+It must be called after done with the substream.

example/client.c

@@ -72,7 +72,7 @@ bool listdir(int fd, char *path)
     
     if (!pb_decode(&input, ListFilesResponse_fields, &response))
     {
-        fprintf(stderr, "Decoding failed.\n");
+        fprintf(stderr, "Decode failed: %s\n", PB_GET_ERROR(&input));
         return false;
     }
     

example/common.c

@@ -19,15 +19,6 @@ static bool read_callback(pb_istream_t *stream, uint8_t *buf, size_t count)
     int fd = (intptr_t)stream->state;
     int result;
     
-    if (buf == NULL)
-    {
-        /* Well, this is a really inefficient way to skip input. */
-        /* It is only used when there are unknown fields. */
-        char dummy;
-        while (count-- && recv(fd, &dummy, 1, 0) == 1);
-        return count == 0;
-    }
-    
     result = recv(fd, buf, count, MSG_WAITALL);
     
     if (result == 0)

example/server.c

@@ -55,7 +55,7 @@ void handle_connection(int connfd)
     
     if (!pb_decode(&input, ListFilesRequest_fields, &request))
     {
-        printf("Decoding failed.\n");
+        printf("Decode failed: %s\n", PB_GET_ERROR(&input));
         return;
     }
     

example_avr_double/Makefile

@@ -0,0 +1,22 @@
+CFLAGS=-Wall -Werror -I .. -g -O0
+DEPS=double_conversion.c ../pb_decode.c ../pb_decode.h ../pb_encode.c ../pb_encode.h ../pb.h
+
+all: run_tests
+
+clean:
+	rm -f test_conversions encode_double decode_double doubleproto.pb.c doubleproto.pb.h
+
+test_conversions: test_conversions.c double_conversion.c
+	$(CC) $(CFLAGS) -o $@ $^
+
+%: %.c $(DEPS) doubleproto.pb.h doubleproto.pb.c
+	$(CC) $(CFLAGS) -o $@ $< double_conversion.c ../pb_decode.c ../pb_encode.c doubleproto.pb.c
+
+doubleproto.pb.c doubleproto.pb.h: doubleproto.proto ../generator/nanopb_generator.py
+	protoc -I. -I../generator -I/usr/include -odoubleproto.pb $<
+	python ../generator/nanopb_generator.py doubleproto.pb
+
+run_tests: test_conversions encode_double decode_double
+	./test_conversions
+	./encode_double | ./decode_double
+    

example_avr_double/README.txt

@@ -0,0 +1,22 @@
+Some processors/compilers, such as AVR-GCC, do not support the double
+datatype. Instead, they have sizeof(double) == 4. Because protocol
+binary format uses the double encoding directly, this causes trouble
+if the protocol in .proto requires double fields.
+
+This directory contains a solution to this problem. It uses uint64_t
+to store the raw wire values, because its size is correct on all
+platforms. The file double_conversion.c provides functions that
+convert these values to/from floats, without relying on compiler
+support.
+
+To use this method, you need to make two modifications to your code:
+
+1) Change all 'double' fields into 'fixed64' in the .proto.
+
+2) Whenever writing to a 'double' field, use float_to_double().
+
+3) Whenever reading a 'double' field, use double_to_float().
+
+The conversion routines should be as accurate as the float datatype can
+be. Furthermore, they should handle all special values (NaN, inf, denormalized
+numbers) correctly. There are testcases in test_conversions.c.

example_avr_double/decode_double.c

@@ -0,0 +1,33 @@
+/* Decodes a double value into a float variable.
+ * Used to read double values with AVR code, which doesn't support double directly.
+ */
+
+#include <stdio.h>
+#include <pb_decode.h>
+#include "double_conversion.h"
+#include "doubleproto.pb.h"
+
+int main()
+{
+    uint8_t buffer[32];
+    size_t count = fread(buffer, 1, sizeof(buffer), stdin);
+    pb_istream_t stream = pb_istream_from_buffer(buffer, count);
+    
+    AVRDoubleMessage message;
+    pb_decode(&stream, AVRDoubleMessage_fields, &message);
+    
+    float v1 = double_to_float(message.field1);
+    float v2 = double_to_float(message.field2);
+
+    printf("Values: %f %f\n", v1, v2);
+    
+    if (v1 == 1234.5678f &&
+        v2 == 0.00001f)
+    {
+        return 0;
+    }
+    else
+    {
+        return 1;
+    }
+}

example_avr_double/double_conversion.c

@@ -0,0 +1,123 @@
+/* Conversion routines for platforms that do not support 'double' directly. */
+
+#include "double_conversion.h"
+#include <math.h>
+
+typedef union {
+    float f;
+    uint32_t i;
+} conversion_t;
+
+/* Note: IEE 754 standard specifies float formats as follows:
+ * Single precision: sign,  8-bit exp, 23-bit frac.
+ * Double precision: sign, 11-bit exp, 52-bit frac.
+ */
+
+uint64_t float_to_double(float value)
+{
+    conversion_t in;
+    in.f = value;
+    uint8_t sign;
+    int16_t exponent;
+    uint64_t mantissa;
+    
+    /* Decompose input value */
+    sign = (in.i >> 31) & 1;
+    exponent = ((in.i >> 23) & 0xFF) - 127;
+    mantissa = in.i & 0x7FFFFF;
+    
+    if (exponent == 128)
+    {
+        /* Special value (NaN etc.) */
+        exponent = 1024;
+    }
+    else if (exponent == -127)
+    {
+        if (!mantissa)
+        {
+            /* Zero */
+            exponent = -1023;
+        }
+        else
+        {
+            /* Denormalized */
+            mantissa <<= 1;
+            while (!(mantissa & 0x800000))
+            {
+                mantissa <<= 1;
+                exponent--;
+            }
+            mantissa &= 0x7FFFFF;
+        }
+    }
+    
+    /* Combine fields */
+    mantissa <<= 29;
+    mantissa |= (uint64_t)(exponent + 1023) << 52;
+    mantissa |= (uint64_t)sign << 63;
+    
+    return mantissa;
+}
+
+float double_to_float(uint64_t value)
+{
+    uint8_t sign;
+    int16_t exponent;
+    uint32_t mantissa;
+    conversion_t out;
+
+    /* Decompose input value */
+    sign = (value >> 63) & 1;
+    exponent = ((value >> 52) & 0x7FF) - 1023;
+    mantissa = (value >> 28) & 0xFFFFFF; /* Highest 24 bits */
+ 
+    /* Figure if value is in range representable by floats. */
+    if (exponent == 1024)
+    {
+        /* Special value */
+        exponent = 128;
+    }
+    else if (exponent > 127)
+    {
+        /* Too large */        
+        if (sign)
+            return -INFINITY;
+        else
+            return INFINITY;
+    }
+    else if (exponent < -150)
+    {
+        /* Too small */
+        if (sign)
+            return -0.0f;
+        else
+            return 0.0f;
+    }
+    else if (exponent < -126)
+    {
+        /* Denormalized */
+        mantissa |= 0x1000000;
+        mantissa >>= (-126 - exponent);
+        exponent = -127;
+    }
+ 
+    /* Round off mantissa */
+    mantissa = (mantissa + 1) >> 1;
+    
+    /* Check if mantissa went over 2.0 */
+    if (mantissa & 0x800000)
+    {
+        exponent += 1;
+        mantissa &= 0x7FFFFF;
+        mantissa >>= 1;
+    }
+    
+    /* Combine fields */
+    out.i = mantissa;
+    out.i |= (uint32_t)(exponent + 127) << 23;
+    out.i |= (uint32_t)sign << 31;
+    
+    return out.f;
+}
+
+

example_avr_double/double_conversion.h

@@ -0,0 +1,26 @@
+/* AVR-GCC does not have real double datatype. Instead its double
+ * is equal to float, i.e. 32 bit value. If you need to communicate
+ * with other systems that use double in their .proto files, you
+ * need to do some conversion.
+ *
+ * These functions use bitwise operations to mangle floats into doubles
+ * and then store them in uint64_t datatype.
+ */
+
+#ifndef DOUBLE_CONVERSION
+#define DOUBLE_CONVERSION
+
+#include <stdint.h>
+
+/* Convert native 4-byte float into a 8-byte double. */
+extern uint64_t float_to_double(float value);
+
+/* Convert 8-byte double into native 4-byte float.
+ * Values are rounded to nearest, 0.5 away from zero.
+ * Overflowing values are converted to Inf or -Inf.
+ */
+extern float double_to_float(uint64_t value);
+
+
+#endif
+

example_avr_double/doubleproto.proto

@@ -0,0 +1,13 @@
+// A message containing doubles, as used by other applications.
+message DoubleMessage {
+    required double field1 = 1;
+    required double field2 = 2;
+}
+
+// A message containing doubles, but redefined using uint64_t.
+// For use in AVR code.
+message AVRDoubleMessage {
+    required fixed64 field1 = 1;
+    required fixed64 field2 = 2;
+}
+

example_avr_double/encode_double.c

@@ -0,0 +1,25 @@
+/* Encodes a float value into a double on the wire.
+ * Used to emit doubles from AVR code, which doesn't support double directly.
+ */
+
+#include <stdio.h>
+#include <pb_encode.h>
+#include "double_conversion.h"
+#include "doubleproto.pb.h"
+
+int main()
+{
+    AVRDoubleMessage message = {
+        float_to_double(1234.5678f),
+        float_to_double(0.00001f)
+    };
+    
+    uint8_t buffer[32];
+    pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
+    
+    pb_encode(&stream, AVRDoubleMessage_fields, &message);
+    fwrite(buffer, 1, stream.bytes_written, stdout);
+
+    return 0;
+}
+

example_avr_double/test_conversions.c

@@ -0,0 +1,56 @@
+#include "double_conversion.h"
+#include <math.h>
+#include <stdio.h>
+
+static const double testvalues[] = {
+           0.0,        -0.0,         0.1,         -0.1,
+          M_PI,       -M_PI,  123456.789,  -123456.789,
+      INFINITY,   -INFINITY,         NAN, INFINITY - INFINITY,
+          1e38,       -1e38,        1e39,        -1e39,
+         1e-38,      -1e-38,       1e-39,       -1e-39,
+   3.14159e-37,-3.14159e-37, 3.14159e-43, -3.14159e-43,
+         1e-60,      -1e-60,       1e-45,       -1e-45,
+    0.99999999999999, -0.99999999999999, 127.999999999999, -127.999999999999
+};
+
+#define TESTVALUES_COUNT (sizeof(testvalues)/sizeof(testvalues[0]))
+
+int main()
+{
+    int status = 0;
+    int i;
+    for (i = 0; i < TESTVALUES_COUNT; i++)
+    {
+        double orig = testvalues[i];
+        float expected_float = (float)orig;
+        double expected_double = (double)expected_float;
+        
+        float got_float = double_to_float(*(uint64_t*)&orig);
+        uint64_t got_double = float_to_double(got_float);
+        
+        uint32_t e1 = *(uint32_t*)&expected_float;
+        uint32_t g1 = *(uint32_t*)&got_float;
+        uint64_t e2 = *(uint64_t*)&expected_double;
+        uint64_t g2 = got_double;
+        
+        if (g1 != e1)
+        {
+            printf("%3d double_to_float fail: %08x != %08x\n", i, g1, e1);
+            status = 1;
+        }
+        
+        if (g2 != e2)
+        {
+            printf("%3d float_to_double fail: %016llx != %016llx\n", i,
+                (unsigned long long)g2,
+                (unsigned long long)e2);
+            status = 1;
+        }
+    }
+
+    return status;
+}
+
+    
+    
+

example_unions/Makefile

@@ -0,0 +1,17 @@
+CFLAGS=-ansi -Wall -Werror -I .. -g -O0
+DEPS=../pb_decode.c ../pb_decode.h ../pb_encode.c ../pb_encode.h ../pb.h
+
+all: encode decode
+	./encode 1 | ./decode
+	./encode 2 | ./decode
+	./encode 3 | ./decode
+
+clean:
+	rm -f encode unionproto.pb.h unionproto.pb.c
+
+%: %.c $(DEPS) unionproto.pb.h unionproto.pb.c
+	$(CC) $(CFLAGS) -o $@ $< ../pb_decode.c ../pb_encode.c unionproto.pb.c
+
+unionproto.pb.h unionproto.pb.c: unionproto.proto ../generator/nanopb_generator.py
+	protoc -I. -I../generator -I/usr/include -ounionproto.pb $<
+	python ../generator/nanopb_generator.py unionproto.pb

example_unions/decode.c

@@ -0,0 +1,96 @@
+/* This program reads a message from stdin, detects its type and decodes it.
+ */
+ 
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <pb_decode.h>
+#include "unionproto.pb.h"
+
+/* This function reads manually the first tag from the stream and finds the
+ * corresponding message type. It doesn't yet decode the actual message.
+ *
+ * Returns a pointer to the MsgType_fields array, as an identifier for the
+ * message type. Returns null if the tag is of unknown type or an error occurs.
+ */
+const pb_field_t* decode_unionmessage_type(pb_istream_t *stream)
+{
+    pb_wire_type_t wire_type;
+    uint32_t tag;
+    bool eof;
+
+    while (pb_decode_tag(stream, &wire_type, &tag, &eof))
+    {
+        if (wire_type == PB_WT_STRING)
+        {
+            const pb_field_t *field;
+            for (field = UnionMessage_fields; field->tag != 0; field++)
+            {
+                if (field->tag == tag && (field->type & PB_LTYPE_SUBMESSAGE))
+                {
+                    /* Found our field. */
+                    return field->ptr;
+                }
+            }
+        }
+        
+        /* Wasn't our field.. */
+        pb_skip_field(stream, wire_type);
+    }
+    
+    return NULL;
+}
+
+bool decode_unionmessage_contents(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct)
+{
+    pb_istream_t substream;
+    bool status;
+    if (!pb_make_string_substream(stream, &substream))
+        return false;
+    
+    status = pb_decode(&substream, fields, dest_struct);
+    pb_close_string_substream(stream, &substream);
+    return status;
+}
+
+int main()
+{
+    /* Read the data into buffer */
+    uint8_t buffer[512];
+    size_t count = fread(buffer, 1, sizeof(buffer), stdin);
+    pb_istream_t stream = pb_istream_from_buffer(buffer, count);
+    
+    const pb_field_t *type = decode_unionmessage_type(&stream);
+    bool status = false;
+    
+    if (type == MsgType1_fields)
+    {
+        MsgType1 msg = {};
+        status = decode_unionmessage_contents(&stream, MsgType1_fields, &msg);
+        printf("Got MsgType1: %d\n", msg.value);
+    }
+    else if (type == MsgType2_fields)
+    {
+        MsgType2 msg = {};
+        status = decode_unionmessage_contents(&stream, MsgType2_fields, &msg);
+        printf("Got MsgType2: %s\n", msg.value ? "true" : "false");
+    }
+    else if (type == MsgType3_fields)
+    {
+        MsgType3 msg = {};
+        status = decode_unionmessage_contents(&stream, MsgType3_fields, &msg);
+        printf("Got MsgType3: %d %d\n", msg.value1, msg.value2);    
+    }
+    
+    if (!status)
+    {
+        printf("Decode failed: %s\n", PB_GET_ERROR(&stream));
+        return 1;
+    }
+    
+    return 0;
+}
+
+
+

example_unions/encode.c

@@ -0,0 +1,85 @@
+/* This program takes a command line argument and encodes a message in
+ * one of MsgType1, MsgType2 or MsgType3.
+ */
+ 
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <pb_encode.h>
+#include "unionproto.pb.h"
+
+/* This function is the core of the union encoding process. It handles
+ * the top-level pb_field_t array manually, in order to encode a correct
+ * field tag before the message. The pointer to MsgType_fields array is
+ * used as an unique identifier for the message type.
+ */
+bool encode_unionmessage(pb_ostream_t *stream, const pb_field_t messagetype[], const void *message)
+{
+    const pb_field_t *field;
+    for (field = UnionMessage_fields; field->tag != 0; field++)
+    {
+        if (field->ptr == messagetype)
+        {
+            /* This is our field, encode the message using it. */
+            if (!pb_encode_tag_for_field(stream, field))
+                return false;
+            
+            return pb_encode_submessage(stream, messagetype, message);
+        }
+    }
+    
+    /* Didn't find the field for messagetype */
+    return false;
+}
+
+int main(int argc, char **argv)
+{
+    if (argc != 2)
+    {
+        fprintf(stderr, "Usage: %s (1|2|3)\n", argv[0]);
+        return 1;
+    }
+    
+    uint8_t buffer[512];
+    pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
+    
+    bool status = false;
+    int msgtype = atoi(argv[1]);
+    if (msgtype == 1)
+    {
+        /* Send message of type 1 */
+        MsgType1 msg = {42};
+        status = encode_unionmessage(&stream, MsgType1_fields, &msg);
+    }
+    else if (msgtype == 2)
+    {
+        /* Send message of type 2 */
+        MsgType2 msg = {true};
+        status = encode_unionmessage(&stream, MsgType2_fields, &msg);
+    }
+    else if (msgtype == 3)
+    {
+        /* Send message of type 3 */
+        MsgType3 msg = {3, 1415};
+        status = encode_unionmessage(&stream, MsgType3_fields, &msg);
+    }
+    else
+    {
+        fprintf(stderr, "Unknown message type: %d\n", msgtype);
+        return 2;
+    }
+    
+    if (!status)
+    {
+        fprintf(stderr, "Encoding failed!\n");
+        return 3;
+    }
+    else
+    {
+        fwrite(buffer, 1, stream.bytes_written, stdout);
+        return 0; /* Success */
+    }
+}
+
+

example_unions/unionproto.proto

@@ -0,0 +1,30 @@
+// This is an example of how to handle 'union' style messages
+// with nanopb, without allocating memory for all the message types.
+//
+// There is no official type in Protocol Buffers for describing unions,
+// but they are commonly implemented by filling out exactly one of
+// several optional fields.
+
+message MsgType1
+{
+    required int32 value = 1;
+}
+
+message MsgType2
+{
+    required bool value = 1;
+}
+
+message MsgType3
+{
+    required int32 value1 = 1;
+    required int32 value2 = 2;
+}
+
+message UnionMessage
+{
+    optional MsgType1 msg1 = 1;
+    optional MsgType2 msg2 = 2;
+    optional MsgType3 msg3 = 3;
+}
+

generator/nanopb.proto

@@ -7,20 +7,54 @@
 
 import "google/protobuf/descriptor.proto";
 
+option java_package = "fi.kapsi.koti.jpa.nanopb";
+
+enum FieldType {
+    FT_DEFAULT = 0; // Automatically decide field type, generate static field if possible.
+    FT_CALLBACK = 1; // Always generate a callback field.
+    FT_STATIC = 2; // Generate a static field or raise an exception if not possible.
+    FT_IGNORE = 3; // Ignore the field completely.
+}
+
 message NanoPBOptions {
+  // Allocated size for 'bytes' and 'string' fields.
   optional int32 max_size = 1;
+  
+  // Allocated number of entries in arrays ('repeated' fields)
   optional int32 max_count = 2;
+  
+  // Force type of field (callback or static allocation)
+  optional FieldType type = 3 [default = FT_DEFAULT];
+  
+  // Use long names for enums, i.e. EnumName_EnumValue.
+  optional bool long_names = 4 [default = true];
+  
+  // Add 'packed' attribute to generated structs.
+  optional bool packed_struct = 5 [default = false];
 }
 
 // Protocol Buffers extension number registry
-// --------------------------------                                                                                                            
+// --------------------------------
-// Project:  Nanopb                                                                                                                            
+// Project:  Nanopb
-// Contact:  Petteri Aimonen <jpa@kapsi.fi>                                                                                                    
+// Contact:  Petteri Aimonen <jpa@kapsi.fi>
-// Web site: http://kapsi.fi/~jpa/nanopb                                                                                                       
+// Web site: http://kapsi.fi/~jpa/nanopb
-// Extensions: 1010 (all types)                                                                                                                
+// Extensions: 1010 (all types)
-// --------------------------------   
+// --------------------------------
+
+extend google.protobuf.FileOptions {
+    optional NanoPBOptions nanopb_fileopt = 1010;
+}
+
+extend google.protobuf.MessageOptions {
+    optional NanoPBOptions nanopb_msgopt = 1010;
+}
+
+extend google.protobuf.EnumOptions {
+    optional NanoPBOptions nanopb_enumopt = 1010;
+}
 
 extend google.protobuf.FieldOptions {
     optional NanoPBOptions nanopb = 1010;
 }
 
+

generator/nanopb_generator.py

@@ -1,4 +1,5 @@
 '''Generate header file for nanopb from a ProtoBuf FileDescriptorSet.'''
+nanopb_version = "0.2.0-dev"
 
 try:
     import google.protobuf.descriptor_pb2 as descriptor
@@ -22,24 +23,34 @@ except:
     print
     raise
 
+
+
+
+
+
+# ---------------------------------------------------------------------------
+#                     Generation of single fields
+# ---------------------------------------------------------------------------
+
+import time
 import os.path
 
-# Values are tuple (c type, pb ltype)
+# Values are tuple (c type, pb type)
 FieldD = descriptor.FieldDescriptorProto
 datatypes = {
-    FieldD.TYPE_BOOL: ('bool', 'PB_LTYPE_VARINT'),
+    FieldD.TYPE_BOOL:       ('bool',     'BOOL'),
-    FieldD.TYPE_DOUBLE: ('double', 'PB_LTYPE_FIXED64'),
+    FieldD.TYPE_DOUBLE:     ('double',   'DOUBLE'),
-    FieldD.TYPE_FIXED32: ('uint32_t', 'PB_LTYPE_FIXED32'),
+    FieldD.TYPE_FIXED32:    ('uint32_t', 'FIXED32'),
-    FieldD.TYPE_FIXED64: ('uint64_t', 'PB_LTYPE_FIXED64'),
+    FieldD.TYPE_FIXED64:    ('uint64_t', 'FIXED64'),
-    FieldD.TYPE_FLOAT: ('float', 'PB_LTYPE_FIXED32'),
+    FieldD.TYPE_FLOAT:      ('float',    'FLOAT'),
-    FieldD.TYPE_INT32: ('int32_t', 'PB_LTYPE_VARINT'),
+    FieldD.TYPE_INT32:      ('int32_t',  'INT32'),
-    FieldD.TYPE_INT64: ('int64_t', 'PB_LTYPE_VARINT'),
+    FieldD.TYPE_INT64:      ('int64_t',  'INT64'),
-    FieldD.TYPE_SFIXED32: ('int32_t', 'PB_LTYPE_FIXED32'),
+    FieldD.TYPE_SFIXED32:   ('int32_t',  'SFIXED32'),
-    FieldD.TYPE_SFIXED64: ('int64_t', 'PB_LTYPE_FIXED64'),
+    FieldD.TYPE_SFIXED64:   ('int64_t',  'SFIXED64'),
-    FieldD.TYPE_SINT32: ('int32_t', 'PB_LTYPE_SVARINT'),
+    FieldD.TYPE_SINT32:     ('int32_t',  'SINT32'),
-    FieldD.TYPE_SINT64: ('int64_t', 'PB_LTYPE_SVARINT'),
+    FieldD.TYPE_SINT64:     ('int64_t',  'SINT64'),
-    FieldD.TYPE_UINT32: ('uint32_t', 'PB_LTYPE_VARINT'),
+    FieldD.TYPE_UINT32:     ('uint32_t', 'UINT32'),
-    FieldD.TYPE_UINT64: ('uint64_t', 'PB_LTYPE_VARINT')
+    FieldD.TYPE_UINT64:     ('uint64_t', 'UINT64')
 }
 
 class Names:
@@ -62,6 +73,9 @@ class Names:
         else:
             raise ValueError("Name parts should be of type str")
     
+    def __eq__(self, other):
+        return isinstance(other, Names) and self.parts == other.parts
+    
 def names_from_type_name(type_name):
     '''Parse Names() from FieldDescriptorProto type_name'''
     if type_name[0] != '.':
@@ -69,19 +83,27 @@ def names_from_type_name(type_name):
     return Names(type_name[1:].split('.'))
 
 class Enum:
-    def __init__(self, names, desc):
+    def __init__(self, names, desc, enum_options):
         '''desc is EnumDescriptorProto'''
+        
+        self.options = enum_options
         self.names = names + desc.name
-        self.values = [(self.names + x.name, x.number) for x in desc.value]
+        
+        if enum_options.long_names:
+            self.values = [(self.names + x.name, x.number) for x in desc.value]            
+        else:
+            self.values = [(names + x.name, x.number) for x in desc.value] 
+        
+        self.value_longnames = [self.names + x.name for x in desc.value]
     
     def __str__(self):
-        result = 'typedef enum {\n'
+        result = 'typedef enum _%s {\n' % self.names
         result += ',\n'.join(["    %s = %d" % x for x in self.values])
         result += '\n} %s;' % self.names
         return result
 
 class Field:
-    def __init__(self, struct_name, desc):
+    def __init__(self, struct_name, desc, field_options):
         '''desc is FieldDescriptorProto'''
         self.tag = desc.number
         self.struct_name = struct_name
@@ -91,76 +113,83 @@ class Field:
         self.max_count = None
         self.array_decl = ""
         
-        # Parse nanopb-specific field options
+        # Parse field options
-        if desc.options.HasExtension(nanopb_pb2.nanopb):
+        if field_options.HasField("max_size"):
-            ext = desc.options.Extensions[nanopb_pb2.nanopb]
+            self.max_size = field_options.max_size
-            if ext.HasField("max_size"):
+        
-                self.max_size = ext.max_size
+        if field_options.HasField("max_count"):
-            if ext.HasField("max_count"):
+            self.max_count = field_options.max_count
-                self.max_count = ext.max_count
         
         if desc.HasField('default_value'):
             self.default = desc.default_value
-        
+           
-        # Decide HTYPE
+        # Check field rules, i.e. required/optional/repeated.
-        # HTYPE is the high-order nibble of nanopb field description,
+        can_be_static = True
-        # defining whether value is required/optional/repeated.
-        is_callback = False
         if desc.label == FieldD.LABEL_REQUIRED:
-            self.htype = 'PB_HTYPE_REQUIRED'
+            self.rules = 'REQUIRED'
         elif desc.label == FieldD.LABEL_OPTIONAL:
-            self.htype = 'PB_HTYPE_OPTIONAL'
+            self.rules = 'OPTIONAL'
         elif desc.label == FieldD.LABEL_REPEATED:
+            self.rules = 'REPEATED'
             if self.max_count is None:
-                is_callback = True
+                can_be_static = False
             else:
-                self.htype = 'PB_HTYPE_ARRAY'
                 self.array_decl = '[%d]' % self.max_count
         else:
             raise NotImplementedError(desc.label)
         
-        # Decide LTYPE and CTYPE
+        # Decide the C data type to use in the struct.
-        # LTYPE is the low-order nibble of nanopb field description,
-        # defining how to decode an individual value.
-        # CTYPE is the name of the c type to use in the struct.
         if datatypes.has_key(desc.type):
-            self.ctype, self.ltype = datatypes[desc.type]
+            self.ctype, self.pbtype = datatypes[desc.type]
         elif desc.type == FieldD.TYPE_ENUM:
-            self.ltype = 'PB_LTYPE_VARINT'
+            self.pbtype = 'ENUM'
             self.ctype = names_from_type_name(desc.type_name)
             if self.default is not None:
                 self.default = self.ctype + self.default
         elif desc.type == FieldD.TYPE_STRING:
-            self.ltype = 'PB_LTYPE_STRING'
+            self.pbtype = 'STRING'
             if self.max_size is None:
-                is_callback = True
+                can_be_static = False
             else:
                 self.ctype = 'char'
                 self.array_decl += '[%d]' % self.max_size
         elif desc.type == FieldD.TYPE_BYTES:
-            self.ltype = 'PB_LTYPE_BYTES'
+            self.pbtype = 'BYTES'
             if self.max_size is None:
-                is_callback = True
+                can_be_static = False
             else:
                 self.ctype = self.struct_name + self.name + 't'
         elif desc.type == FieldD.TYPE_MESSAGE:
-            self.ltype = 'PB_LTYPE_SUBMESSAGE'
+            self.pbtype = 'MESSAGE'
             self.ctype = self.submsgname = names_from_type_name(desc.type_name)
         else:
             raise NotImplementedError(desc.type)
         
-        if is_callback:
+        if field_options.type == nanopb_pb2.FT_DEFAULT:
-            self.htype = 'PB_HTYPE_CALLBACK'
+            if can_be_static:
+                field_options.type = nanopb_pb2.FT_STATIC
+            else:
+                field_options.type = nanopb_pb2.FT_CALLBACK
+        
+        if field_options.type == nanopb_pb2.FT_STATIC and not can_be_static:
+            raise Exception("Field %s is defined as static, but max_size or max_count is not given." % self.name)
+        
+        if field_options.type == nanopb_pb2.FT_STATIC:
+            self.allocation = 'STATIC'
+        elif field_options.type == nanopb_pb2.FT_CALLBACK:
+            self.allocation = 'CALLBACK'
             self.ctype = 'pb_callback_t'
             self.array_decl = ''
+        else:
+            raise NotImplementedError(field_options.type)
     
     def __cmp__(self, other):
         return cmp(self.tag, other.tag)
     
     def __str__(self):
-        if self.htype == 'PB_HTYPE_OPTIONAL':
+        if self.rules == 'OPTIONAL':
             result = '    bool has_' + self.name + ';\n'
-        elif self.htype == 'PB_HTYPE_ARRAY':
+        elif self.rules == 'REPEATED' and self.allocation == 'STATIC':
             result = '    size_t ' + self.name + '_count;\n'
         else:
             result = ''
@@ -169,7 +198,7 @@ class Field:
     
     def types(self):
         '''Return definitions for any special types this field might need.'''
-        if self.ltype == 'PB_LTYPE_BYTES' and self.max_size is not None:
+        if self.pbtype == 'BYTES' and self.allocation == 'STATIC':
             result = 'typedef struct {\n'
             result += '    size_t size;\n'
             result += '    uint8_t bytes[%d];\n' % self.max_size
@@ -182,30 +211,25 @@ class Field:
         '''Return definition for this field's default value.'''
         if self.default is None:
             return None
+
+        ctype, default = self.ctype, self.default
+        array_decl = ''
         
-        if self.ltype == 'PB_LTYPE_STRING':
+        if self.pbtype == 'STRING':
-            ctype = 'char'
+            if self.allocation != 'STATIC':
-            if self.max_size is None:
                 return None # Not implemented
-            else:
+        
-                array_decl = '[%d]' % (self.max_size + 1)
+            array_decl = '[%d]' % self.max_size
             default = str(self.default).encode('string_escape')
             default = default.replace('"', '\\"')
             default = '"' + default + '"'
-        elif self.ltype == 'PB_LTYPE_BYTES':
+        elif self.pbtype == 'BYTES':
+            if self.allocation != 'STATIC':
+                return None # Not implemented
+
             data = self.default.decode('string_escape')
             data = ['0x%02x' % ord(c) for c in data]
-            
-            if self.max_size is None:
-                return None # Not implemented
-            else:
-                ctype = self.ctype
-            
             default = '{%d, {%s}}' % (len(data), ','.join(data))
-            array_decl = ''
-        else:
-            ctype, default = self.ctype, self.default
-            array_decl = ''
         
         if declaration_only:
             return 'extern const %s %s_default%s;' % (ctype, self.struct_name + self.name, array_decl)
@@ -216,46 +240,57 @@ class Field:
         '''Return the pb_field_t initializer to use in the constant array.
         prev_field_name is the name of the previous field or None.
         '''
-        result = '    {%d, ' % self.tag
+        result  = '    PB_FIELD(%3d, ' % self.tag
-        result += self.htype
+        result += '%-8s, ' % self.pbtype
-        if self.ltype is not None:
+        result += '%s, ' % self.rules
-            result += ' | ' + self.ltype
+        result += '%s, ' % self.allocation
-        result += ',\n'
+        result += '%s, ' % self.struct_name
+        result += '%s, ' % self.name
+        result += '%s, ' % (prev_field_name or self.name)
         
-        if prev_field_name is None:
+        if self.pbtype == 'MESSAGE':
-            result += '    offsetof(%s, %s),' % (self.struct_name, self.name)
+            result += '&%s_fields)' % self.submsgname
+        elif self.default is None:
+            result += '0)'
+        elif self.pbtype in ['BYTES', 'STRING'] and self.allocation != 'STATIC':
+            result += '0)' # Arbitrary size default values not implemented
         else:
-            result += '    pb_delta_end(%s, %s, %s),' % (self.struct_name, self.name, prev_field_name)
+            result += '&%s_default)' % (self.struct_name + self.name)
-        
-        if self.htype == 'PB_HTYPE_OPTIONAL':
-            result += '\n    pb_delta(%s, has_%s, %s),' % (self.struct_name, self.name, self.name)
-        elif self.htype == 'PB_HTYPE_ARRAY':
-            result += '\n    pb_delta(%s, %s_count, %s),' % (self.struct_name, self.name, self.name)
-        else:
-            result += ' 0,'
-        
-        
-        if self.htype == 'PB_HTYPE_ARRAY':
-            result += '\n    pb_membersize(%s, %s[0]),' % (self.struct_name, self.name)
-            result += ('\n    pb_membersize(%s, %s) / pb_membersize(%s, %s[0]),'
-                       % (self.struct_name, self.name, self.struct_name, self.name))
-        else:
-            result += '\n    pb_membersize(%s, %s),' % (self.struct_name, self.name)
-            result += ' 0,'
-        
-        if self.ltype == 'PB_LTYPE_SUBMESSAGE':
-            result += '\n    &%s_fields}' % self.submsgname
-        elif self.default is None or self.htype == 'PB_HTYPE_CALLBACK':
-            result += ' 0}'
-        else:
-            result += '\n    &%s_default}' % (self.struct_name + self.name)
         
         return result
+    
+    def largest_field_value(self):
+        '''Determine if this field needs 16bit or 32bit pb_field_t structure to compile properly.
+        Returns numeric value or a C-expression for assert.'''
+        if self.pbtype == 'MESSAGE':
+            if self.rules == 'REPEATED' and self.allocation == 'STATIC':
+                return 'pb_membersize(%s, %s[0])' % (self.struct_name, self.name)
+            else:
+                return 'pb_membersize(%s, %s)' % (self.struct_name, self.name)
+
+        return max(self.tag, self.max_size, self.max_count)        
+
+
+
+
+
+
+# ---------------------------------------------------------------------------
+#                   Generation of messages (structures)
+# ---------------------------------------------------------------------------
+
 
 class Message:
-    def __init__(self, names, desc):
+    def __init__(self, names, desc, message_options):
         self.name = names
-        self.fields = [Field(self.name, f) for f in desc.field]
+        self.fields = []
+        
+        for f in desc.field:
+            field_options = get_nanopb_suboptions(f, message_options)
+            if field_options.type != nanopb_pb2.FT_IGNORE:
+                self.fields.append(Field(self.name, f, field_options))
+        
+        self.packed = message_options.packed_struct
         self.ordered_fields = self.fields[:]
         self.ordered_fields.sort()
 
@@ -264,9 +299,14 @@ class Message:
         return [str(field.ctype) for field in self.fields]
     
     def __str__(self):
-        result = 'typedef struct {\n'
+        result = 'typedef struct _%s {\n' % self.name
         result += '\n'.join([str(f) for f in self.ordered_fields])
-        result += '\n} %s;' % self.name
+        result += '\n}'
+        
+        if self.packed:
+            result += ' pb_packed'
+        
+        result += ' %s;' % self.name
         return result
     
     def types(self):
@@ -295,12 +335,22 @@ class Message:
         prev = None
         for field in self.ordered_fields:
             result += field.pb_field_t(prev)
-            result += ',\n\n'
+            result += ',\n'
             prev = field.name
         
         result += '    PB_LAST_FIELD\n};'
         return result
 
+
+
+
+
+
+# ---------------------------------------------------------------------------
+#                    Processing of entire .proto files
+# ---------------------------------------------------------------------------
+
+
 def iterate_messages(desc, names = Names()):
     '''Recursively find all messages. For each, yield name, DescriptorProto.'''
     if hasattr(desc, 'message_type'):
@@ -315,7 +365,7 @@ def iterate_messages(desc, names = Names()):
         for x in iterate_messages(submsg, sub_names):
             yield x
 
-def parse_file(fdesc):
+def parse_file(fdesc, file_options):
     '''Takes a FileDescriptorProto and returns tuple (enum, messages).'''
     
     enums = []
@@ -327,12 +377,24 @@ def parse_file(fdesc):
         base_name = Names()
     
     for enum in fdesc.enum_type:
-        enums.append(Enum(base_name, enum))
+        enum_options = get_nanopb_suboptions(enum, file_options)
+        enums.append(Enum(base_name, enum, enum_options))
     
     for names, message in iterate_messages(fdesc, base_name):
-        messages.append(Message(names, message))
+        message_options = get_nanopb_suboptions(message, file_options)
+        messages.append(Message(names, message, message_options))
         for enum in message.enum_type:
-            enums.append(Enum(names, enum))
+            enum_options = get_nanopb_suboptions(enum, message_options)
+            enums.append(Enum(names, enum, enum_options))
+    
+    # Fix field default values where enum short names are used.
+    for enum in enums:
+        if not enum.options.long_names:
+            for message in messages:
+                for field in message.fields:
+                    if field.default in enum.value_longnames:
+                        idx = enum.value_longnames.index(field.default)
+                        field.default = enum.values[idx][0]
     
     return enums, messages
 
@@ -343,7 +405,7 @@ def toposort2(data):
     '''
     for k, v in data.items():
         v.discard(k) # Ignore self dependencies
-    extra_items_in_deps = reduce(set.union, data.values()) - set(data.keys())
+    extra_items_in_deps = reduce(set.union, data.values(), set()) - set(data.keys())
     data.update(dict([(item, set()) for item in extra_items_in_deps]))
     while True:
         ordered = set(item for item,dep in data.items() if not dep)
@@ -367,14 +429,25 @@ def sort_dependencies(messages):
         if msgname in message_by_name:
             yield message_by_name[msgname]
 
+def make_identifier(headername):
+    '''Make #ifndef identifier that contains uppercase A-Z and digits 0-9'''
+    result = ""
+    for c in headername.upper():
+        if c.isalnum():
+            result += c
+        else:
+            result += '_'
+    return result
+
 def generate_header(dependencies, headername, enums, messages):
     '''Generate content for a header file.
     Generates strings, which should be concatenated and stored to file.
     '''
     
     yield '/* Automatically generated nanopb header */\n'
+    yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime())
     
-    symbol = headername.replace('.', '_').upper()
+    symbol = make_identifier(headername)
     yield '#ifndef _PB_%s_\n' % symbol
     yield '#define _PB_%s_\n' % symbol
     yield '#include <pb.h>\n\n'
@@ -382,7 +455,10 @@ def generate_header(dependencies, headername, enums, messages):
     for dependency in dependencies:
         noext = os.path.splitext(dependency)[0]
         yield '#include "%s.pb.h"\n' % noext
-    yield '\n'
+    
+    yield '#ifdef __cplusplus\n'
+    yield 'extern "C" {\n'
+    yield '#endif\n\n'
     
     yield '/* Enum definitions */\n'
     for enum in enums:
@@ -402,12 +478,18 @@ def generate_header(dependencies, headername, enums, messages):
     for msg in messages:
         yield msg.fields_declaration() + '\n'
     
+    yield '\n#ifdef __cplusplus\n'
+    yield '} /* extern "C" */\n'
+    yield '#endif\n'
+    
+    # End of header
     yield '\n#endif\n'
 
 def generate_source(headername, enums, messages):
     '''Generate content for a source file.'''
     
     yield '/* Automatically generated nanopb constant definitions */\n'
+    yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime())
     yield '#include "%s"\n\n' % headername
     
     for msg in messages:
@@ -417,40 +499,171 @@ def generate_source(headername, enums, messages):
     
     for msg in messages:
         yield msg.fields_definition() + '\n\n'
+        
+    if messages:
+        count_required_fields = lambda m: len([f for f in msg.fields if f.rules == 'REQUIRED'])
+        largest_msg = max(messages, key = count_required_fields)
+        largest_count = count_required_fields(largest_msg)
+        if largest_count > 64:
+            yield '\n/* Check that missing required fields will be properly detected */\n'
+            yield '#if PB_MAX_REQUIRED_FIELDS < %d\n' % largest_count
+            yield '#error Properly detecting missing required fields in %s requires \\\n' % largest_msg.name
+            yield '       setting PB_MAX_REQUIRED_FIELDS to %d or more.\n' % largest_count
+            yield '#endif\n'
+    
+    # Add checks for numeric limits
+    worst = 0
+    worst_field = ''
+    checks = []
+    checks_msgnames = []
+    for msg in messages:
+        checks_msgnames.append(msg.name)
+        for field in msg.fields:
+            status = field.largest_field_value()
+            if isinstance(status, (str, unicode)):
+                checks.append(status)
+            elif status > worst:
+                worst = status
+                worst_field = str(field.struct_name) + '.' + str(field.name)
+
+    if worst > 255 or checks:
+        yield '\n/* Check that field information fits in pb_field_t */\n'
+        
+        if worst < 65536:
+            yield '#if !defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)\n'
+            if worst > 255:
+                yield '#error Field descriptor for %s is too large. Define PB_FIELD_16BIT to fix this.\n' % worst_field
+            else:
+                assertion = ' && '.join(str(c) + ' < 256' for c in checks)
+                msgs = '_'.join(str(n) for n in checks_msgnames)
+                yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_%s)\n'%(assertion,msgs)
+            yield '#endif\n\n'
+        
+        if worst > 65535 or checks:
+            yield '#if !defined(PB_FIELD_32BIT)\n'
+            if worst > 65535:
+                yield '#error Field descriptor for %s is too large. Define PB_FIELD_32BIT to fix this.\n' % worst_field
+            else:
+                assertion = ' && '.join(str(c) + ' < 65536' for c in checks)
+                msgs = '_'.join(str(n) for n in checks_msgnames)
+                yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_%s)\n'%(assertion,msgs)
+            yield '#endif\n'
+    
+    # Add check for sizeof(double)
+    has_double = False
+    for msg in messages:
+        for field in msg.fields:
+            if field.ctype == 'double':
+                has_double = True
+    
+    if has_double:
+        yield '\n'
+        yield '/* On some platforms (such as AVR), double is really float.\n'
+        yield ' * These are not directly supported by nanopb, but see example_avr_double.\n'
+        yield ' * To get rid of this error, remove any double fields from your .proto.\n'
+        yield ' */\n'
+        yield 'STATIC_ASSERT(sizeof(double) == 8, DOUBLE_MUST_BE_8_BYTES)\n'
+    
+    yield '\n'
+
+
+# ---------------------------------------------------------------------------
+#                         Command line interface
+# ---------------------------------------------------------------------------
+
+import sys
+import os.path    
+from optparse import OptionParser
+import google.protobuf.text_format as text_format
+
+optparser = OptionParser(
+    usage = "Usage: nanopb_generator.py [options] file.pb ...",
+    epilog = "Compile file.pb from file.proto by: 'protoc -ofile.pb file.proto'. " +
+             "Output will be written to file.pb.h and file.pb.c.")
+optparser.add_option("-x", dest="exclude", metavar="FILE", action="append", default=[],
+    help="Exclude file from generated #include list.")
+optparser.add_option("-q", "--quiet", dest="quiet", action="store_true", default=False,
+    help="Don't print anything except errors.")
+optparser.add_option("-v", "--verbose", dest="verbose", action="store_true", default=False,
+    help="Print more information.")
+optparser.add_option("-s", dest="settings", metavar="OPTION:VALUE", action="append", default=[],
+    help="Set generator option (max_size, max_count etc.).")
+
+def get_nanopb_suboptions(subdesc, options):
+    '''Get copy of options, and merge information from subdesc.'''
+    new_options = nanopb_pb2.NanoPBOptions()
+    new_options.CopyFrom(options)
+    
+    if isinstance(subdesc.options, descriptor.FieldOptions):
+        ext_type = nanopb_pb2.nanopb
+    elif isinstance(subdesc.options, descriptor.FileOptions):
+        ext_type = nanopb_pb2.nanopb_fileopt
+    elif isinstance(subdesc.options, descriptor.MessageOptions):
+        ext_type = nanopb_pb2.nanopb_msgopt
+    elif isinstance(subdesc.options, descriptor.EnumOptions):
+        ext_type = nanopb_pb2.nanopb_enumopt
+    else:
+        raise Exception("Unknown options type")
+    
+    if subdesc.options.HasExtension(ext_type):
+        ext = subdesc.options.Extensions[ext_type]
+        new_options.MergeFrom(ext)
+    
+    return new_options
+
+def process(filenames, options):
+    '''Process the files given on the command line.'''
+    
+    if not filenames:
+        optparser.print_help()
+        return False
+    
+    if options.quiet:
+        options.verbose = False
+    
+    toplevel_options = nanopb_pb2.NanoPBOptions()
+    for s in options.settings:
+        text_format.Merge(s, toplevel_options)
+    
+    for filename in filenames:
+        data = open(filename, 'rb').read()
+        fdesc = descriptor.FileDescriptorSet.FromString(data)
+        
+        file_options = get_nanopb_suboptions(fdesc.file[0], toplevel_options)
+        
+        if options.verbose:
+            print "Options for " + filename + ":"
+            print text_format.MessageToString(file_options)
+        
+        enums, messages = parse_file(fdesc.file[0], file_options)
+        
+        noext = os.path.splitext(filename)[0]
+        headername = noext + '.pb.h'
+        sourcename = noext + '.pb.c'
+        headerbasename = os.path.basename(headername)
+        
+        if not options.quiet:
+            print "Writing to " + headername + " and " + sourcename
+        
+        # List of .proto files that should not be included in the C header file
+        # even if they are mentioned in the source .proto.
+        excludes = ['nanopb.proto', 'google/protobuf/descriptor.proto'] + options.exclude
+        dependencies = [d for d in fdesc.file[0].dependency if d not in excludes]
+        
+        header = open(headername, 'w')
+        for part in generate_header(dependencies, headerbasename, enums, messages):
+            header.write(part)
+
+        source = open(sourcename, 'w')
+        for part in generate_source(headerbasename, enums, messages):
+            source.write(part)
+
+    return True
 
 if __name__ == '__main__':
-    import sys
+    options, filenames = optparser.parse_args()
-    import os.path
+    status = process(filenames, options)
     
-    if len(sys.argv) != 2:
+    if not status:
-        print "Usage: " + sys.argv[0] + " file.pb"
-        print "where file.pb has been compiled from .proto by:"
-        print "protoc -ofile.pb file.proto"
-        print "Output fill be written to file.pb.h and file.pb.c"
         sys.exit(1)
     
-    data = open(sys.argv[1], 'rb').read()
-    fdesc = descriptor.FileDescriptorSet.FromString(data)
-    enums, messages = parse_file(fdesc.file[0])
-    
-    noext = os.path.splitext(sys.argv[1])[0]
-    headername = noext + '.pb.h'
-    sourcename = noext + '.pb.c'
-    headerbasename = os.path.basename(headername)
-    
-    print "Writing to " + headername + " and " + sourcename
-    
-    # List of .proto files that should not be included in the C header file
-    # even if they are mentioned in the source .proto.
-    excludes = ['nanopb.proto', 'google/protobuf/descriptor.proto']
-    dependencies = [d for d in fdesc.file[0].dependency if d not in excludes]
-    
-    header = open(headername, 'w')
-    for part in generate_header(dependencies, headerbasename, enums, messages):
-        header.write(part)
-
-    source = open(sourcename, 'w')
-    for part in generate_source(headerbasename, enums, messages):
-        source.write(part)
-
-    

generator/nanopb_pb2.py

@@ -7,15 +7,75 @@ from google.protobuf import descriptor_pb2
 # @@protoc_insertion_point(imports)
 
 
+import google.protobuf.descriptor_pb2
+
 DESCRIPTOR = descriptor.FileDescriptor(
   name='nanopb.proto',
   package='',
-  serialized_pb='\n\x0cnanopb.proto\x1a google/protobuf/descriptor.proto\"4\n\rNanoPBOptions\x12\x10\n\x08max_size\x18\x01 \x01(\x05\x12\x11\n\tmax_count\x18\x02 \x01(\x05:>\n\x06nanopb\x12\x1d.google.protobuf.FieldOptions\x18\xf2\x07 \x01(\x0b\x32\x0e.NanoPBOptions')
+  serialized_pb='\n\x0cnanopb.proto\x1a google/protobuf/descriptor.proto\"\x92\x01\n\rNanoPBOptions\x12\x10\n\x08max_size\x18\x01 \x01(\x05\x12\x11\n\tmax_count\x18\x02 \x01(\x05\x12$\n\x04type\x18\x03 \x01(\x0e\x32\n.FieldType:\nFT_DEFAULT\x12\x18\n\nlong_names\x18\x04 \x01(\x08:\x04true\x12\x1c\n\rpacked_struct\x18\x05 \x01(\x08:\x05\x66\x61lse*J\n\tFieldType\x12\x0e\n\nFT_DEFAULT\x10\x00\x12\x0f\n\x0b\x46T_CALLBACK\x10\x01\x12\r\n\tFT_STATIC\x10\x02\x12\r\n\tFT_IGNORE\x10\x03:E\n\x0enanopb_fileopt\x12\x1c.google.protobuf.FileOptions\x18\xf2\x07 \x01(\x0b\x32\x0e.NanoPBOptions:G\n\rnanopb_msgopt\x12\x1f.google.protobuf.MessageOptions\x18\xf2\x07 \x01(\x0b\x32\x0e.NanoPBOptions:E\n\x0enanopb_enumopt\x12\x1c.google.protobuf.EnumOptions\x18\xf2\x07 \x01(\x0b\x32\x0e.NanoPBOptions:>\n\x06nanopb\x12\x1d.google.protobuf.FieldOptions\x18\xf2\x07 \x01(\x0b\x32\x0e.NanoPBOptions')
+
+_FIELDTYPE = descriptor.EnumDescriptor(
+  name='FieldType',
+  full_name='FieldType',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    descriptor.EnumValueDescriptor(
+      name='FT_DEFAULT', index=0, number=0,
+      options=None,
+      type=None),
+    descriptor.EnumValueDescriptor(
+      name='FT_CALLBACK', index=1, number=1,
+      options=None,
+      type=None),
+    descriptor.EnumValueDescriptor(
+      name='FT_STATIC', index=2, number=2,
+      options=None,
+      type=None),
+    descriptor.EnumValueDescriptor(
+      name='FT_IGNORE', index=3, number=3,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=199,
+  serialized_end=273,
+)
 
 
+FT_DEFAULT = 0
+FT_CALLBACK = 1
+FT_STATIC = 2
+FT_IGNORE = 3
+
+NANOPB_FILEOPT_FIELD_NUMBER = 1010
+nanopb_fileopt = descriptor.FieldDescriptor(
+  name='nanopb_fileopt', full_name='nanopb_fileopt', index=0,
+  number=1010, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  options=None)
+NANOPB_MSGOPT_FIELD_NUMBER = 1010
+nanopb_msgopt = descriptor.FieldDescriptor(
+  name='nanopb_msgopt', full_name='nanopb_msgopt', index=1,
+  number=1010, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  options=None)
+NANOPB_ENUMOPT_FIELD_NUMBER = 1010
+nanopb_enumopt = descriptor.FieldDescriptor(
+  name='nanopb_enumopt', full_name='nanopb_enumopt', index=2,
+  number=1010, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  options=None)
 NANOPB_FIELD_NUMBER = 1010
 nanopb = descriptor.FieldDescriptor(
-  name='nanopb', full_name='nanopb', index=0,
+  name='nanopb', full_name='nanopb', index=3,
   number=1010, type=11, cpp_type=10, label=1,
   has_default_value=False, default_value=None,
   message_type=None, enum_type=None, containing_type=None,
@@ -44,6 +104,27 @@ _NANOPBOPTIONS = descriptor.Descriptor(
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       options=None),
+    descriptor.FieldDescriptor(
+      name='type', full_name='NanoPBOptions.type', index=2,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    descriptor.FieldDescriptor(
+      name='long_names', full_name='NanoPBOptions.long_names', index=3,
+      number=4, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=True,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    descriptor.FieldDescriptor(
+      name='packed_struct', full_name='NanoPBOptions.packed_struct', index=4,
+      number=5, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
   ],
   extensions=[
   ],
@@ -53,12 +134,12 @@ _NANOPBOPTIONS = descriptor.Descriptor(
   options=None,
   is_extendable=False,
   extension_ranges=[],
-  serialized_start=50,
+  serialized_start=51,
-  serialized_end=102,
+  serialized_end=197,
 )
 
-import google.protobuf.descriptor_pb2
+_NANOPBOPTIONS.fields_by_name['type'].enum_type = _FIELDTYPE
-
+DESCRIPTOR.message_types_by_name['NanoPBOptions'] = _NANOPBOPTIONS
 
 class NanoPBOptions(message.Message):
   __metaclass__ = reflection.GeneratedProtocolMessageType
@@ -66,6 +147,12 @@ class NanoPBOptions(message.Message):
   
   # @@protoc_insertion_point(class_scope:NanoPBOptions)
 
+nanopb_fileopt.message_type = _NANOPBOPTIONS
+google.protobuf.descriptor_pb2.FileOptions.RegisterExtension(nanopb_fileopt)
+nanopb_msgopt.message_type = _NANOPBOPTIONS
+google.protobuf.descriptor_pb2.MessageOptions.RegisterExtension(nanopb_msgopt)
+nanopb_enumopt.message_type = _NANOPBOPTIONS
+google.protobuf.descriptor_pb2.EnumOptions.RegisterExtension(nanopb_enumopt)
 nanopb.message_type = _NANOPBOPTIONS
 google.protobuf.descriptor_pb2.FieldOptions.RegisterExtension(nanopb)
 # @@protoc_insertion_point(module_scope)

pb.h

@@ -6,6 +6,8 @@
  * see pb_encode.h or pb_decode.h
  */
 
+#define NANOPB_VERSION nanopb-0.2.0-dev
+
 #include <stdint.h>
 #include <stddef.h>
 #include <stdbool.h>
@@ -22,6 +24,25 @@
 #define UNUSED(x) (void)(x)
 #endif
 
+/* Compile-time assertion, used for checking compatible compilation options.
+ * If this fails on your compiler for some reason, use #define STATIC_ASSERT
+ * to disable it. */
+#ifndef STATIC_ASSERT
+#define STATIC_ASSERT(COND,MSG) typedef char STATIC_ASSERT_MSG(MSG, __LINE__, __COUNTER__)[(COND)?1:-1];
+#define STATIC_ASSERT_MSG(MSG, LINE, COUNTER) STATIC_ASSERT_MSG_(MSG, LINE, COUNTER)
+#define STATIC_ASSERT_MSG_(MSG, LINE, COUNTER) static_assertion_##MSG##LINE##COUNTER
+#endif
+
+/* Number of required fields to keep track of
+ * (change here or on compiler command line). */
+#ifndef PB_MAX_REQUIRED_FIELDS
+#define PB_MAX_REQUIRED_FIELDS 64
+#endif
+
+#if PB_MAX_REQUIRED_FIELDS < 64
+#error You should not lower PB_MAX_REQUIRED_FIELDS from the default value (64).
+#endif
+
 /* List of possible field types. These are used in the autogenerated code.
  * Least-significant 4 bits tell the scalar type
  * Most-significant 4 bits specify repeated/required/packed etc.
@@ -32,75 +53,91 @@
  * SINT* is different, though, because it is zig-zag coded.
  */
 
-typedef enum {
+typedef uint8_t pb_type_t;
-    /************************
-     * Field contents types *
-     ************************/
-    
-    /* Numeric types */
-    PB_LTYPE_VARINT = 0x00, /* int32, uint32, int64, uint64, bool, enum */
-    PB_LTYPE_SVARINT = 0x01, /* sint32, sint64 */
-    PB_LTYPE_FIXED32 = 0x02, /* fixed32, sfixed32, float */
-    PB_LTYPE_FIXED64 = 0x03, /* fixed64, sfixed64, double */
-    
-    /* Marker for last packable field type. */
-    PB_LTYPE_LAST_PACKABLE = 0x03,
-    
-    /* Byte array with pre-allocated buffer.
-     * data_size is the length of the allocated PB_BYTES_ARRAY structure. */
-    PB_LTYPE_BYTES = 0x04,
-    
-    /* String with pre-allocated buffer.
-     * data_size is the maximum length. */
-    PB_LTYPE_STRING = 0x05,
-    
-    /* Submessage
-     * submsg_fields is pointer to field descriptions */
-    PB_LTYPE_SUBMESSAGE = 0x06,
-    
-    /* Number of declared LTYPES */
-    PB_LTYPES_COUNT = 7,
-    
-    /******************
-     * Modifier flags *
-     ******************/
-    
-    /* Just the basic, write data at data_offset */
-    PB_HTYPE_REQUIRED = 0x00,
-    
-    /* Write true at size_offset */
-    PB_HTYPE_OPTIONAL = 0x10,
-    
-    /* Read to pre-allocated array
-     * Maximum number of entries is array_size,
-     * actual number is stored at size_offset */
-    PB_HTYPE_ARRAY = 0x20,
-    
-    /* Works for all required/optional/repeated fields.
-     * data_offset points to pb_callback_t structure.
-     * LTYPE should be 0 (it is ignored, but sometimes
-     * used to speculatively index an array). */
-    PB_HTYPE_CALLBACK = 0x30
-} pb_packed pb_type_t;
 
-#define PB_HTYPE(x) ((x) & 0xF0)
+/************************
-#define PB_LTYPE(x) ((x) & 0x0F)
+ * Field contents types *
+ ************************/
+
+/* Numeric types */
+#define PB_LTYPE_VARINT 0x00 /* int32, uint32, int64, uint64, bool, enum */
+#define PB_LTYPE_SVARINT 0x01 /* sint32, sint64 */
+#define PB_LTYPE_FIXED32 0x02 /* fixed32, sfixed32, float */
+#define PB_LTYPE_FIXED64 0x03 /* fixed64, sfixed64, double */
+
+/* Marker for last packable field type. */
+#define PB_LTYPE_LAST_PACKABLE 0x03
+
+/* Byte array with pre-allocated buffer.
+ * data_size is the length of the allocated PB_BYTES_ARRAY structure. */
+#define PB_LTYPE_BYTES 0x04
+
+/* String with pre-allocated buffer.
+ * data_size is the maximum length. */
+#define PB_LTYPE_STRING 0x05
+
+/* Submessage
+ * submsg_fields is pointer to field descriptions */
+#define PB_LTYPE_SUBMESSAGE 0x06
+
+/* Number of declared LTYPES */
+#define PB_LTYPES_COUNT 7
+#define PB_LTYPE_MASK 0x0F
+
+/**************************
+ * Field repetition rules *
+ **************************/
+
+#define PB_HTYPE_REQUIRED 0x00
+#define PB_HTYPE_OPTIONAL 0x10
+#define PB_HTYPE_REPEATED 0x20
+#define PB_HTYPE_MASK     0x30
+
+/********************
+ * Allocation types *
+ ********************/
+ 
+#define PB_ATYPE_STATIC   0x00
+#define PB_ATYPE_CALLBACK 0x40
+#define PB_ATYPE_MASK     0xC0
+
+#define PB_ATYPE(x) ((x) & PB_ATYPE_MASK)
+#define PB_HTYPE(x) ((x) & PB_HTYPE_MASK)
+#define PB_LTYPE(x) ((x) & PB_LTYPE_MASK)
 
 /* This structure is used in auto-generated constants
  * to specify struct fields.
- * You can change field sizes here if you need structures
+ * You can change field sizes if you need structures
  * larger than 256 bytes or field tags larger than 256.
  * The compiler should complain if your .proto has such
- * structures ("initializer too large for type").
+ * structures. Fix that by defining PB_FIELD_16BIT or
+ * PB_FIELD_32BIT.
  */
 typedef struct _pb_field_t pb_field_t;
 struct _pb_field_t {
+
+#if !defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)
     uint8_t tag;
     pb_type_t type;
     uint8_t data_offset; /* Offset of field data, relative to previous field. */
     int8_t size_offset; /* Offset of array size or has-boolean, relative to data */
     uint8_t data_size; /* Data size in bytes for a single item */
     uint8_t array_size; /* Maximum number of entries in array */
+#elif defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)
+    uint16_t tag;
+    pb_type_t type;
+    uint8_t data_offset;
+    int8_t size_offset;
+    uint16_t data_size;
+    uint16_t array_size;
+#else
+    uint32_t tag;
+    pb_type_t type;
+    uint8_t data_offset;
+    int8_t size_offset;
+    uint32_t data_size;
+    uint32_t array_size;
+#endif
     
     /* Field definitions for submessage
      * OR default value for all other non-array, non-callback types
@@ -112,10 +149,12 @@ struct _pb_field_t {
  * It has the number of bytes in the beginning, and after that an array.
  * Note that actual structs used will have a different length of bytes array.
  */
-typedef struct {
+struct _pb_bytes_array_t {
     size_t size;
     uint8_t bytes[1];
-} pb_bytes_array_t;
+};
+
+typedef struct _pb_bytes_array_t pb_bytes_array_t;
 
 /* This structure is used for giving the callback function.
  * It is stored in the message structure and filled in by the method that
@@ -160,8 +199,101 @@ typedef enum {
 #define pb_membersize(st, m) (sizeof ((st*)0)->m)
 #define pb_arraysize(st, m) (pb_membersize(st, m) / pb_membersize(st, m[0]))
 #define pb_delta(st, m1, m2) ((int)offsetof(st, m1) - (int)offsetof(st, m2))
-#define pb_delta_end(st, m1, m2) (offsetof(st, m1) - offsetof(st, m2) - pb_membersize(st, m2))
+#define pb_delta_end(st, m1, m2) (offsetof(st, m1) == offsetof(st, m2) \
-#define PB_LAST_FIELD {0,0,0,0}
+                                  ? offsetof(st, m1) \
+                                  : offsetof(st, m1) - offsetof(st, m2) - pb_membersize(st, m2))
+#define PB_LAST_FIELD {0,(pb_type_t) 0,0,0,0,0,0}
 
+/* Required fields are the simplest. They just have delta (padding) from
+ * previous field end, and the size of the field. Pointer is used for
+ * submessages and default values.
+ */
+#define PB_REQUIRED_STATIC(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_STATIC | PB_HTYPE_REQUIRED | ltype, \
+    pb_delta_end(st, m, pm), 0, pb_membersize(st, m), 0, ptr}
+
+/* Optional fields add the delta to the has_ variable. */
+#define PB_OPTIONAL_STATIC(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_STATIC | PB_HTYPE_OPTIONAL | ltype, \
+    pb_delta_end(st, m, pm), \
+    pb_delta(st, has_ ## m, m), \
+    pb_membersize(st, m), 0, ptr}
+
+/* Repeated fields have a _count field and also the maximum number of entries. */
+#define PB_REPEATED_STATIC(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_STATIC | PB_HTYPE_REPEATED | ltype, \
+    pb_delta_end(st, m, pm), \
+    pb_delta(st, m ## _count, m), \
+    pb_membersize(st, m[0]), \
+    pb_arraysize(st, m), ptr}
+
+/* Callbacks are much like required fields except with special datatype. */
+#define PB_REQUIRED_CALLBACK(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_CALLBACK | PB_HTYPE_REQUIRED | ltype, \
+    pb_delta_end(st, m, pm), 0, pb_membersize(st, m), 0, ptr}
+
+#define PB_OPTIONAL_CALLBACK(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_CALLBACK | PB_HTYPE_OPTIONAL | ltype, \
+    pb_delta_end(st, m, pm), 0, pb_membersize(st, m), 0, ptr}
+    
+#define PB_REPEATED_CALLBACK(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_CALLBACK | PB_HTYPE_REPEATED | ltype, \
+    pb_delta_end(st, m, pm), 0, pb_membersize(st, m), 0, ptr}
+
+/* The mapping from protobuf types to LTYPEs is done using these macros. */
+#define PB_LTYPE_MAP_BOOL       PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_BYTES      PB_LTYPE_BYTES
+#define PB_LTYPE_MAP_DOUBLE     PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_ENUM       PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_FIXED32    PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_FIXED64    PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_FLOAT      PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_INT32      PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_INT64      PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_MESSAGE    PB_LTYPE_SUBMESSAGE
+#define PB_LTYPE_MAP_SFIXED32   PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_SFIXED64   PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_SINT32     PB_LTYPE_SVARINT
+#define PB_LTYPE_MAP_SINT64     PB_LTYPE_SVARINT
+#define PB_LTYPE_MAP_STRING     PB_LTYPE_STRING
+#define PB_LTYPE_MAP_UINT32     PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_UINT64     PB_LTYPE_VARINT
+
+/* This is the actual macro used in field descriptions.
+ * It takes these arguments:
+ * - Field tag number
+ * - Field type:   BOOL, BYTES, DOUBLE, ENUM, FIXED32, FIXED64,
+ *                 FLOAT, INT32, INT64, MESSAGE, SFIXED32, SFIXED64
+ *                 SINT32, SINT64, STRING, UINT32 or UINT64
+ * - Field rules:  REQUIRED, OPTIONAL or REPEATED
+ * - Allocation:   STATIC or CALLBACK
+ * - Message name
+ * - Field name
+ * - Previous field name (or field name again for first field)
+ * - Pointer to default value or submsg fields.
+ */
+
+#define PB_FIELD(tag, type, rules, allocation, message, field, prevfield, ptr) \
+    PB_ ## rules ## _ ## allocation(tag, message, field, prevfield, \
+                                    PB_LTYPE_MAP_ ## type, ptr)
+
+/* These macros are used for giving out error messages.
+ * They are mostly a debugging aid; the main error information
+ * is the true/false return value from functions.
+ * Some code space can be saved by disabling the error
+ * messages if not used.
+ */
+#ifdef PB_NO_ERRMSG
+#define PB_RETURN_ERROR(stream,msg) return false
+#define PB_GET_ERROR(stream) "(errmsg disabled)"
+#else
+#define PB_RETURN_ERROR(stream,msg) \
+    do {\
+        if ((stream)->errmsg == NULL) \
+            (stream)->errmsg = (msg); \
+        return false; \
+    } while(0)
+#define PB_GET_ERROR(stream) ((stream)->errmsg ? (stream)->errmsg : "(none)")
+#endif
 
 #endif

pb_decode.c

@@ -3,14 +3,15 @@
  * 2011 Petteri Aimonen <jpa@kapsi.fi>
  */
 
-
+/* The warn_unused_result attribute appeared first in gcc-3.4.0 */
-#ifdef __GNUC__
+#if !defined(__GNUC__) || ( __GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
-/* Verify that we remember to check all return values for proper error propagation */
+    #define checkreturn
-#define checkreturn __attribute__((warn_unused_result))
 #else
-#define checkreturn
+    /* Verify that we remember to check all return values for proper error propagation */
+    #define checkreturn __attribute__((warn_unused_result))
 #endif
 
+#define NANOPB_INTERNALS
 #include "pb.h"
 #include "pb_decode.h"
 #include <string.h>
@@ -35,35 +36,67 @@ static const pb_decoder_t PB_DECODERS[PB_LTYPES_COUNT] = {
  * pb_istream *
  **************/
 
-bool checkreturn pb_read(pb_istream_t *stream, uint8_t *buf, size_t count)
-{
-    if (stream->bytes_left < count)
-        return false;
-    
-    if (!stream->callback(stream, buf, count))
-        return false;
-    
-    stream->bytes_left -= count;
-    return true;
-}
-
 static bool checkreturn buf_read(pb_istream_t *stream, uint8_t *buf, size_t count)
 {
     uint8_t *source = (uint8_t*)stream->state;
+    stream->state = source + count;
     
     if (buf != NULL)
-        memcpy(buf, source, count);
+    {
+        while (count--)
+            *buf++ = *source++;
+    }
     
-    stream->state = source + count;
+    return true;
+}
+
+bool checkreturn pb_read(pb_istream_t *stream, uint8_t *buf, size_t count)
+{
+#ifndef PB_BUFFER_ONLY
+	if (buf == NULL && stream->callback != buf_read)
+	{
+		/* Skip input bytes */
+		uint8_t tmp[16];
+		while (count > 16)
+		{
+			if (!pb_read(stream, tmp, 16))
+				return false;
+			
+			count -= 16;
+		}
+		
+		return pb_read(stream, tmp, count);
+	}
+#endif
+
+    if (stream->bytes_left < count)
+        PB_RETURN_ERROR(stream, "end-of-stream");
+    
+#ifndef PB_BUFFER_ONLY
+    if (!stream->callback(stream, buf, count))
+        PB_RETURN_ERROR(stream, "io error");
+#else
+    if (!buf_read(stream, buf, count))
+        return false;
+#endif
+    
+    stream->bytes_left -= count;
     return true;
 }
 
 pb_istream_t pb_istream_from_buffer(uint8_t *buf, size_t bufsize)
 {
     pb_istream_t stream;
+#ifdef PB_BUFFER_ONLY
+    stream.callback = NULL;
+#else
     stream.callback = &buf_read;
+#endif
     stream.state = buf;
     stream.bytes_left = bufsize;
+#ifndef PB_NO_ERRMSG
+    stream.errmsg = NULL;
+#endif
     return stream;
 }
 
@@ -73,28 +106,60 @@ pb_istream_t pb_istream_from_buffer(uint8_t *buf, size_t bufsize)
 
 static bool checkreturn pb_decode_varint32(pb_istream_t *stream, uint32_t *dest)
 {
-    uint64_t temp;
+    uint8_t byte;
-    bool status = pb_decode_varint(stream, &temp);
+    uint32_t result;
-    *dest = (uint32_t)temp;
+    
-    return status;
+    if (!pb_read(stream, &byte, 1))
+        return false;
+    
+    if (!(byte & 0x80))
+    {
+        /* Quick case, 1 byte value */
+        result = byte;
+    }
+    else
+    {
+        /* Multibyte case */
+        uint8_t bitpos = 7;
+        result = byte & 0x7F;
+        
+        do
+        {
+            if (bitpos >= 32)
+                PB_RETURN_ERROR(stream, "varint overflow");
+            
+            if (!pb_read(stream, &byte, 1))
+                return false;
+            
+            result |= (uint32_t)(byte & 0x7F) << bitpos;
+            bitpos = (uint8_t)(bitpos + 7);
+        } while (byte & 0x80);
+   }
+   
+   *dest = result;
+   return true;
 }
 
 bool checkreturn pb_decode_varint(pb_istream_t *stream, uint64_t *dest)
 {
     uint8_t byte;
     uint8_t bitpos = 0;
-    *dest = 0;
+    uint64_t result = 0;
     
-    while (bitpos < 64 && pb_read(stream, &byte, 1))
+    do
     {
-        *dest |= (uint64_t)(byte & 0x7F) << bitpos;
+        if (bitpos >= 64)
-        bitpos += 7;
+            PB_RETURN_ERROR(stream, "varint overflow");
         
-        if (!(byte & 0x80))
+        if (!pb_read(stream, &byte, 1))
-            return true;
+            return false;
-    }
+
+        result |= (uint64_t)(byte & 0x7F) << bitpos;
+        bitpos = (uint8_t)(bitpos + 7);
+    } while (byte & 0x80);
     
-    return false;
+    *dest = result;
+    return true;
 }
 
 bool checkreturn pb_skip_varint(pb_istream_t *stream)
@@ -117,12 +182,33 @@ bool checkreturn pb_skip_string(pb_istream_t *stream)
     return pb_read(stream, NULL, length);
 }
 
-/* Currently the wire type related stuff is kept hidden from
+bool checkreturn pb_decode_tag(pb_istream_t *stream, pb_wire_type_t *wire_type, uint32_t *tag, bool *eof)
- * callbacks. They shouldn't need it. It's better for performance
+{
- * to just assume the correct type and fail safely on corrupt message.
+    uint32_t temp;
- */
+    *eof = false;
+    *wire_type = (pb_wire_type_t) 0;
+    *tag = 0;
+    
+    if (!pb_decode_varint32(stream, &temp))
+    {
+        if (stream->bytes_left == 0)
+            *eof = true;
 
-static bool checkreturn skip(pb_istream_t *stream, pb_wire_type_t wire_type)
+        return false;
+    }
+    
+    if (temp == 0)
+    {
+        *eof = true; /* Special feature: allow 0-terminated messages. */
+        return false;
+    }
+    
+    *tag = temp >> 3;
+    *wire_type = (pb_wire_type_t)(temp & 7);
+    return true;
+}
+
+bool checkreturn pb_skip_field(pb_istream_t *stream, pb_wire_type_t wire_type)
 {
     switch (wire_type)
     {
@@ -130,7 +216,7 @@ static bool checkreturn skip(pb_istream_t *stream, pb_wire_type_t wire_type)
         case PB_WT_64BIT: return pb_read(stream, NULL, 8);
         case PB_WT_STRING: return pb_skip_string(stream);
         case PB_WT_32BIT: return pb_read(stream, NULL, 4);
-        default: return false;
+        default: PB_RETURN_ERROR(stream, "invalid wire_type");
     }
 }
 
@@ -160,15 +246,14 @@ static bool checkreturn read_raw_value(pb_istream_t *stream, pb_wire_type_t wire
             *size = 4;
             return pb_read(stream, buf, 4);
         
-        default: return false;
+        default: PB_RETURN_ERROR(stream, "invalid wire_type");
     }
 }
 
 /* Decode string length from stream and return a substream with limited length.
- * Before disposing the substream, remember to copy the substream->state back
+ * Remember to close the substream using pb_close_string_substream().
- * to stream->state.
  */
-static bool checkreturn make_string_substream(pb_istream_t *stream, pb_istream_t *substream)
+bool checkreturn pb_make_string_substream(pb_istream_t *stream, pb_istream_t *substream)
 {
     uint32_t size;
     if (!pb_decode_varint32(stream, &size))
@@ -176,27 +261,38 @@ static bool checkreturn make_string_substream(pb_istream_t *stream, pb_istream_t
     
     *substream = *stream;
     if (substream->bytes_left < size)
-        return false;
+        PB_RETURN_ERROR(stream, "parent stream too short");
     
     substream->bytes_left = size;
     stream->bytes_left -= size;
     return true;
 }
 
+void pb_close_string_substream(pb_istream_t *stream, pb_istream_t *substream)
+{
+    stream->state = substream->state;
+
+#ifndef PB_NO_ERRMSG
+    stream->errmsg = substream->errmsg;
+#endif
+}
+
 /* Iterator for pb_field_t list */
 typedef struct {
-    const pb_field_t *start;
+    const pb_field_t *start; /* Start of the pb_field_t array */
-    const pb_field_t *current;
+    const pb_field_t *current; /* Current position of the iterator */
-    int field_index;
+    unsigned field_index; /* Zero-based index of the field. */
-    void *dest_struct;
+    unsigned required_field_index; /* Zero-based index that counts only the required fields */
-    void *pData;
+    void *dest_struct; /* Pointer to the destination structure to decode to */
-    void *pSize;
+    void *pData; /* Pointer where to store current field value */
+    void *pSize; /* Pointer where to store the size of current array field */
 } pb_field_iterator_t;
 
 static void pb_field_init(pb_field_iterator_t *iter, const pb_field_t *fields, void *dest_struct)
 {
     iter->start = iter->current = fields;
     iter->field_index = 0;
+    iter->required_field_index = 0;
     iter->pData = (char*)dest_struct + iter->current->data_offset;
     iter->pSize = (char*)iter->pData + iter->current->size_offset;
     iter->dest_struct = dest_struct;
@@ -207,8 +303,14 @@ static bool pb_field_next(pb_field_iterator_t *iter)
     bool notwrapped = true;
     size_t prev_size = iter->current->data_size;
     
-    if (PB_HTYPE(iter->current->type) == PB_HTYPE_ARRAY)
+    if (PB_ATYPE(iter->current->type) == PB_ATYPE_STATIC &&
+        PB_HTYPE(iter->current->type) == PB_HTYPE_REPEATED)
+    {
         prev_size *= iter->current->array_size;
+    }
+    
+    if (PB_HTYPE(iter->current->type) == PB_HTYPE_REQUIRED)
+        iter->required_field_index++;
     
     iter->current++;
     iter->field_index++;
@@ -216,6 +318,7 @@ static bool pb_field_next(pb_field_iterator_t *iter)
     {
         iter->current = iter->start;
         iter->field_index = 0;
+        iter->required_field_index = 0;
         iter->pData = iter->dest_struct;
         prev_size = 0;
         notwrapped = false;
@@ -226,9 +329,9 @@ static bool pb_field_next(pb_field_iterator_t *iter)
     return notwrapped;
 }
 
-static bool checkreturn pb_field_find(pb_field_iterator_t *iter, int tag)
+static bool checkreturn pb_field_find(pb_field_iterator_t *iter, uint32_t tag)
 {
-    int start = iter->field_index;
+    unsigned start = iter->field_index;
     
     do {
         if (iter->current->tag == tag)
@@ -243,11 +346,15 @@ static bool checkreturn pb_field_find(pb_field_iterator_t *iter, int tag)
  * Decode a single field *
  *************************/
 
-static bool checkreturn decode_field(pb_istream_t *stream, pb_wire_type_t wire_type, pb_field_iterator_t *iter)
+static bool checkreturn decode_static_field(pb_istream_t *stream, pb_wire_type_t wire_type, pb_field_iterator_t *iter)
 {
-    pb_decoder_t func = PB_DECODERS[PB_LTYPE(iter->current->type)];
+    pb_type_t type;
+    pb_decoder_t func;
     
-    switch (PB_HTYPE(iter->current->type))
+    type = iter->current->type;
+    func = PB_DECODERS[PB_LTYPE(type)];
+
+    switch (PB_HTYPE(type))
     {
         case PB_HTYPE_REQUIRED:
             return func(stream, iter->current, iter->pData);
@@ -256,24 +363,33 @@ static bool checkreturn decode_field(pb_istream_t *stream, pb_wire_type_t wire_t
             *(bool*)iter->pSize = true;
             return func(stream, iter->current, iter->pData);
     
-        case PB_HTYPE_ARRAY:
+        case PB_HTYPE_REPEATED:
             if (wire_type == PB_WT_STRING
-                && PB_LTYPE(iter->current->type) <= PB_LTYPE_LAST_PACKABLE)
+                && PB_LTYPE(type) <= PB_LTYPE_LAST_PACKABLE)
             {
                 /* Packed array */
+                bool status = true;
                 size_t *size = (size_t*)iter->pSize;
                 pb_istream_t substream;
-                if (!make_string_substream(stream, &substream))
+                if (!pb_make_string_substream(stream, &substream))
                     return false;
                 
                 while (substream.bytes_left && *size < iter->current->array_size)
                 {
                     void *pItem = (uint8_t*)iter->pData + iter->current->data_size * (*size);
                     if (!func(&substream, iter->current, pItem))
-                        return false;
+                    {
+                        status = false;
+                        break;
+                    }
                     (*size)++;
                 }
-                return (substream.bytes_left == 0);
+                pb_close_string_substream(stream, &substream);
+                
+                if (substream.bytes_left != 0)
+                    PB_RETURN_ERROR(stream, "array overflow");
+                
+                return status;
             }
             else
             {
@@ -281,55 +397,70 @@ static bool checkreturn decode_field(pb_istream_t *stream, pb_wire_type_t wire_t
                 size_t *size = (size_t*)iter->pSize;
                 void *pItem = (uint8_t*)iter->pData + iter->current->data_size * (*size);
                 if (*size >= iter->current->array_size)
-                    return false;
+                    PB_RETURN_ERROR(stream, "array overflow");
                 
                 (*size)++;
                 return func(stream, iter->current, pItem);
             }
+
+        default:
+            PB_RETURN_ERROR(stream, "invalid field type");
+    }
+}
+
+static bool checkreturn decode_callback_field(pb_istream_t *stream, pb_wire_type_t wire_type, pb_field_iterator_t *iter)
+{
+    pb_callback_t *pCallback = (pb_callback_t*)iter->pData;
+    
+    if (pCallback->funcs.decode == NULL)
+        return pb_skip_field(stream, wire_type);
+    
+    if (wire_type == PB_WT_STRING)
+    {
+        pb_istream_t substream;
         
-        case PB_HTYPE_CALLBACK:
+        if (!pb_make_string_substream(stream, &substream))
+            return false;
+        
+        while (substream.bytes_left)
         {
-            pb_callback_t *pCallback = (pb_callback_t*)iter->pData;
+            if (!pCallback->funcs.decode(&substream, iter->current, pCallback->arg))
-            
+                PB_RETURN_ERROR(stream, "callback failed");
-            if (pCallback->funcs.decode == NULL)
-                return skip(stream, wire_type);
-            
-            if (wire_type == PB_WT_STRING)
-            {
-                pb_istream_t substream;
-                
-                if (!make_string_substream(stream, &substream))
-                    return false;
-                
-                while (substream.bytes_left)
-                {
-                    if (!pCallback->funcs.decode(&substream, iter->current, pCallback->arg))
-                        return false;
-                }
-                
-                stream->state = substream.state;
-                return true;
-            }
-            else
-            {
-                /* Copy the single scalar value to stack.
-                 * This is required so that we can limit the stream length,
-                 * which in turn allows to use same callback for packed and
-                 * not-packed fields. */
-                pb_istream_t substream;
-                uint8_t buffer[10];
-                size_t size = sizeof(buffer);
-                
-                if (!read_raw_value(stream, wire_type, buffer, &size))
-                    return false;
-                substream = pb_istream_from_buffer(buffer, size);
-                
-                return pCallback->funcs.decode(&substream, iter->current, pCallback->arg);
-            }
         }
         
-        default:
+        pb_close_string_substream(stream, &substream);
+        return true;
+    }
+    else
+    {
+        /* Copy the single scalar value to stack.
+         * This is required so that we can limit the stream length,
+         * which in turn allows to use same callback for packed and
+         * not-packed fields. */
+        pb_istream_t substream;
+        uint8_t buffer[10];
+        size_t size = sizeof(buffer);
+        
+        if (!read_raw_value(stream, wire_type, buffer, &size))
             return false;
+        substream = pb_istream_from_buffer(buffer, size);
+        
+        return pCallback->funcs.decode(&substream, iter->current, pCallback->arg);
+    }
+}
+
+static bool checkreturn decode_field(pb_istream_t *stream, pb_wire_type_t wire_type, pb_field_iterator_t *iter)
+{
+    switch (PB_ATYPE(iter->current->type))
+    {
+        case PB_ATYPE_STATIC:
+            return decode_static_field(stream, wire_type, iter);
+        
+        case PB_ATYPE_CALLBACK:
+            return decode_callback_field(stream, wire_type, iter);
+        
+        default:
+            PB_RETURN_ERROR(stream, "invalid field type");
     }
 }
 
@@ -342,37 +473,43 @@ static void pb_message_set_to_defaults(const pb_field_t fields[], void *dest_str
     /* Initialize size/has fields and apply default values */
     do
     {
+        pb_type_t type;
+        type = iter.current->type;
+    
         if (iter.current->tag == 0)
             continue;
         
-        /* Initialize the size field for optional/repeated fields to 0. */
+        if (PB_ATYPE(type) == PB_ATYPE_STATIC)
-        if (PB_HTYPE(iter.current->type) == PB_HTYPE_OPTIONAL)
         {
-            *(bool*)iter.pSize = false;
+            /* Initialize the size field for optional/repeated fields to 0. */
+            if (PB_HTYPE(type) == PB_HTYPE_OPTIONAL)
+            {
+                *(bool*)iter.pSize = false;
+            }
+            else if (PB_HTYPE(type) == PB_HTYPE_REPEATED)
+            {
+                *(size_t*)iter.pSize = 0;
+                continue; /* Array is empty, no need to initialize contents */
+            }
+            
+            /* Initialize field contents to default value */
+            if (PB_LTYPE(iter.current->type) == PB_LTYPE_SUBMESSAGE)
+            {
+                pb_message_set_to_defaults((const pb_field_t *) iter.current->ptr, iter.pData);
+            }
+            else if (iter.current->ptr != NULL)
+            {
+                memcpy(iter.pData, iter.current->ptr, iter.current->data_size);
+            }
+            else
+            {
+                memset(iter.pData, 0, iter.current->data_size);
+            }
         }
-        else if (PB_HTYPE(iter.current->type) == PB_HTYPE_ARRAY)
+        else if (PB_ATYPE(type) == PB_ATYPE_CALLBACK)
-        {
-            *(size_t*)iter.pSize = 0;
-            continue; /* Array is empty, no need to initialize contents */
-        }
-        
-        /* Initialize field contents to default value */
-        if (PB_HTYPE(iter.current->type) == PB_HTYPE_CALLBACK)
         {
             continue; /* Don't overwrite callback */
         }
-        else if (PB_LTYPE(iter.current->type) == PB_LTYPE_SUBMESSAGE)
-        {
-            pb_message_set_to_defaults(iter.current->ptr, iter.pData);
-        }
-        else if (iter.current->ptr != NULL)
-        {
-            memcpy(iter.pData, iter.current->ptr, iter.current->data_size);
-        }
-        else
-        {
-            memset(iter.pData, 0, iter.current->data_size);
-        }
     } while (pb_field_next(&iter));
 }
 
@@ -380,127 +517,184 @@ static void pb_message_set_to_defaults(const pb_field_t fields[], void *dest_str
  * Decode all fields *
  *********************/
 
-bool checkreturn pb_decode(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct)
+bool checkreturn pb_decode_noinit(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct)
 {
-    uint32_t fields_seen = 0; /* Used to check for required fields */
+    uint8_t fields_seen[(PB_MAX_REQUIRED_FIELDS + 7) / 8] = {0}; /* Used to check for required fields */
     pb_field_iterator_t iter;
-    int i;
-    
-    pb_message_set_to_defaults(fields, dest_struct);
     
     pb_field_init(&iter, fields, dest_struct);
     
     while (stream->bytes_left)
     {
-        uint32_t temp;
+        uint32_t tag;
-        int tag;
         pb_wire_type_t wire_type;
-        if (!pb_decode_varint32(stream, &temp))
+        bool eof;
+        
+        if (!pb_decode_tag(stream, &wire_type, &tag, &eof))
         {
-            if (stream->bytes_left == 0)
+            if (eof)
-                break; /* It was EOF */
+                break;
             else
-                return false; /* It was error */
+                return false;
         }
         
-        if (temp == 0)
-            break; /* Special feature: allow 0-terminated messages. */
-        
-        tag = temp >> 3;
-        wire_type = (pb_wire_type_t)(temp & 7);
-        
         if (!pb_field_find(&iter, tag))
         {
             /* No match found, skip data */
-            if (!skip(stream, wire_type))
+            if (!pb_skip_field(stream, wire_type))
                 return false;
             continue;
         }
         
-        fields_seen |= 1 << (iter.field_index & 31);
+        if (PB_HTYPE(iter.current->type) == PB_HTYPE_REQUIRED
+            && iter.required_field_index < PB_MAX_REQUIRED_FIELDS)
+        {
+            fields_seen[iter.required_field_index >> 3] |= (uint8_t)(1 << (iter.required_field_index & 7));
+        }
             
         if (!decode_field(stream, wire_type, &iter))
             return false;
     }
     
-    /* Check that all required fields (mod 31) were present. */
+    /* Check that all required fields were present. */
-    for (i = 0; fields[i].tag != 0; i++)
     {
-        if (PB_HTYPE(fields[i].type) == PB_HTYPE_REQUIRED &&
+        /* First figure out the number of required fields by
-            !(fields_seen & (1 << (i & 31))))
+         * seeking to the end of the field array. Usually we
+         * are already close to end after decoding.
+         */
+        unsigned req_field_count;
+        pb_type_t last_type;
+        unsigned i;
+        do {
+            req_field_count = iter.required_field_index;
+            last_type = iter.current->type;
+        } while (pb_field_next(&iter));
+        
+        /* Fixup if last field was also required. */
+        if (PB_HTYPE(last_type) == PB_HTYPE_REQUIRED)
+            req_field_count++;
+        
+        /* Check the whole bytes */
+        for (i = 0; i < (req_field_count >> 3); i++)
         {
-            return false;
+            if (fields_seen[i] != 0xFF)
+                PB_RETURN_ERROR(stream, "missing required field");
         }
+        
+        /* Check the remaining bits */
+        if (fields_seen[req_field_count >> 3] != (0xFF >> (8 - (req_field_count & 7))))
+            PB_RETURN_ERROR(stream, "missing required field");
     }
     
     return true;
 }
 
+bool checkreturn pb_decode(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct)
+{
+    pb_message_set_to_defaults(fields, dest_struct);
+    return pb_decode_noinit(stream, fields, dest_struct);
+}
+
 /* Field decoders */
 
-/* Copy destsize bytes from src so that values are casted properly.
+bool pb_decode_svarint(pb_istream_t *stream, int64_t *dest)
- * On little endian machine, copy first n bytes of src
- * On big endian machine, copy last n bytes of src
- * srcsize must always be larger than destsize
- */
-static void endian_copy(void *dest, void *src, size_t destsize, size_t srcsize)
 {
-#ifdef __BIG_ENDIAN__
+    uint64_t value;
-    memcpy(dest, (char*)src + (srcsize - destsize), destsize);
+    if (!pb_decode_varint(stream, &value))
-#else
+        return false;
-    UNUSED(srcsize);
+    
-    memcpy(dest, src, destsize);
+    if (value & 1)
-#endif
+        *dest = (int64_t)(~(value >> 1));
+    else
+        *dest = (int64_t)(value >> 1);
+    
+    return true;
+}
+
+bool pb_decode_fixed32(pb_istream_t *stream, void *dest)
+{
+    #ifdef __BIG_ENDIAN__
+    uint8_t *bytes = (uint8_t*)dest;
+    uint8_t lebytes[4];
+    
+    if (!pb_read(stream, lebytes, 4))
+        return false;
+    
+    bytes[0] = lebytes[3];
+    bytes[1] = lebytes[2];
+    bytes[2] = lebytes[1];
+    bytes[3] = lebytes[0];
+    return true;
+    #else
+    return pb_read(stream, (uint8_t*)dest, 4);
+    #endif   
+}
+
+bool pb_decode_fixed64(pb_istream_t *stream, void *dest)
+{
+    #ifdef __BIG_ENDIAN__
+    uint8_t *bytes = (uint8_t*)dest;
+    uint8_t lebytes[8];
+    
+    if (!pb_read(stream, lebytes, 8))
+        return false;
+    
+    bytes[0] = lebytes[7];
+    bytes[1] = lebytes[6];
+    bytes[2] = lebytes[5];
+    bytes[3] = lebytes[4];
+    bytes[4] = lebytes[3];
+    bytes[5] = lebytes[2];
+    bytes[6] = lebytes[1];
+    bytes[7] = lebytes[0];
+    return true;
+    #else
+    return pb_read(stream, (uint8_t*)dest, 8);
+    #endif   
 }
 
 bool checkreturn pb_dec_varint(pb_istream_t *stream, const pb_field_t *field, void *dest)
 {
-    uint64_t temp;
+    uint64_t value;
-    bool status = pb_decode_varint(stream, &temp);
+    bool status = pb_decode_varint(stream, &value);
-    endian_copy(dest, &temp, field->data_size, sizeof(temp));
+    
+    switch (field->data_size)
+    {
+        case 1: *(uint8_t*)dest = (uint8_t)value; break;
+        case 2: *(uint16_t*)dest = (uint16_t)value; break;
+        case 4: *(uint32_t*)dest = (uint32_t)value; break;
+        case 8: *(uint64_t*)dest = value; break;
+        default: PB_RETURN_ERROR(stream, "invalid data_size");
+    }
+    
     return status;
 }
 
 bool checkreturn pb_dec_svarint(pb_istream_t *stream, const pb_field_t *field, void *dest)
 {
-    uint64_t temp;
+    int64_t value;
-    bool status = pb_decode_varint(stream, &temp);
+    bool status = pb_decode_svarint(stream, &value);
-    temp = (temp >> 1) ^ -(int64_t)(temp & 1);
+    
-    endian_copy(dest, &temp, field->data_size, sizeof(temp));
+    switch (field->data_size)
+    {
+        case 4: *(int32_t*)dest = (int32_t)value; break;
+        case 8: *(int64_t*)dest = value; break;
+        default: PB_RETURN_ERROR(stream, "invalid data_size");
+    }
+    
     return status;
 }
 
 bool checkreturn pb_dec_fixed32(pb_istream_t *stream, const pb_field_t *field, void *dest)
 {
-#ifdef __BIG_ENDIAN__
-    uint8_t bytes[4] = {0};
-    bool status = pb_read(stream, bytes, 4);
-    if (status) {
-      uint8_t bebytes[4] = {bytes[3], bytes[2], bytes[1], bytes[0]};
-      memcpy(dest, bebytes, 4);
-    }
-    return status;
-#else
     UNUSED(field);
-    return pb_read(stream, (uint8_t*)dest, 4);
+    return pb_decode_fixed32(stream, dest);
-#endif
 }
 
 bool checkreturn pb_dec_fixed64(pb_istream_t *stream, const pb_field_t *field, void *dest)
 {
-#ifdef __BIG_ENDIAN__
-    uint8_t bytes[8] = {0};
-    bool status = pb_read(stream, bytes, 8);
-    if (status) {
-      uint8_t bebytes[8] = {bytes[7], bytes[6], bytes[5], bytes[4], 
-                            bytes[3], bytes[2], bytes[1], bytes[0]};
-      memcpy(dest, bebytes, 8);
-    }
-    return status;
-#else
     UNUSED(field);
-    return pb_read(stream, (uint8_t*)dest, 8);
+    return pb_decode_fixed64(stream, dest);
-#endif
 }
 
 bool checkreturn pb_dec_bytes(pb_istream_t *stream, const pb_field_t *field, void *dest)
@@ -514,7 +708,7 @@ bool checkreturn pb_dec_bytes(pb_istream_t *stream, const pb_field_t *field, voi
     
     /* Check length, noting the space taken by the size_t header. */
     if (x->size > field->data_size - offsetof(pb_bytes_array_t, bytes))
-        return false;
+        PB_RETURN_ERROR(stream, "bytes overflow");
     
     return pb_read(stream, x->bytes, x->size);
 }
@@ -528,7 +722,7 @@ bool checkreturn pb_dec_string(pb_istream_t *stream, const pb_field_t *field, vo
     
     /* Check length, noting the null terminator */
     if (size + 1 > field->data_size)
-        return false;
+        PB_RETURN_ERROR(stream, "string overflow");
     
     status = pb_read(stream, (uint8_t*)dest, size);
     *((uint8_t*)dest + size) = 0;
@@ -539,14 +733,21 @@ bool checkreturn pb_dec_submessage(pb_istream_t *stream, const pb_field_t *field
 {
     bool status;
     pb_istream_t substream;
+    const pb_field_t* submsg_fields = (const pb_field_t*)field->ptr;
     
-    if (!make_string_substream(stream, &substream))
+    if (!pb_make_string_substream(stream, &substream))
         return false;
     
     if (field->ptr == NULL)
-        return false;
+        PB_RETURN_ERROR(stream, "invalid field descriptor");
     
-    status = pb_decode(&substream, (pb_field_t*)field->ptr, dest);
+    /* New array entries need to be initialized, while required and optional
-    stream->state = substream.state;
+     * submessages have already been initialized in the top-level pb_decode. */
+    if (PB_HTYPE(field->type) == PB_HTYPE_REPEATED)
+        status = pb_decode(&substream, submsg_fields, dest);
+    else
+        status = pb_decode_noinit(&substream, submsg_fields, dest);
+    
+    pb_close_string_substream(stream, &substream);
     return status;
 }

pb_decode.h

@@ -3,7 +3,7 @@
 
 /* pb_decode.h: Functions to decode protocol buffers. Depends on pb_decode.c.
  * The main function is pb_decode. You will also need to create an input
- * stream, which is easiest to do with pb_istream_t.
+ * stream, which is easiest to do with pb_istream_from_buffer().
  * 
  * You also need structures and their corresponding pb_field_t descriptions.
  * These are usually generated from .proto-files with a script.
@@ -12,6 +12,10 @@
 #include <stdbool.h>
 #include "pb.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Lightweight input stream.
  * You can provide a callback function for reading or use
  * pb_istream_from_buffer.
@@ -19,20 +23,31 @@
  * Rules for callback:
  * 1) Return false on IO errors. This will cause decoding to abort.
  * 
- * 2) If buf is NULL, read but don't store bytes ("skip input").
+ * 2) You can use state to store your own data (e.g. buffer pointer),
- * 
- * 3) You can use state to store your own data (e.g. buffer pointer),
  * and rely on pb_read to verify that no-body reads past bytes_left.
  * 
- * 4) Your callback may be used with substreams, in which case bytes_left
+ * 3) Your callback may be used with substreams, in which case bytes_left
  * is different than from the main stream. Don't use bytes_left to compute
  * any pointers.
  */
 struct _pb_istream_t
 {
+#ifdef PB_BUFFER_ONLY
+    /* Callback pointer is not used in buffer-only configuration.
+     * Having an int pointer here allows binary compatibility but
+     * gives an error if someone tries to assign callback function.
+     */
+    int *callback;
+#else
     bool (*callback)(pb_istream_t *stream, uint8_t *buf, size_t count);
+#endif
+
     void *state; /* Free field for use by callback implementation */
     size_t bytes_left;
+    
+#ifndef PB_NO_ERRMSG
+    const char *errmsg;
+#endif
 };
 
 pb_istream_t pb_istream_from_buffer(uint8_t *buf, size_t bufsize);
@@ -44,21 +59,49 @@ bool pb_read(pb_istream_t *stream, uint8_t *buf, size_t count);
  */
 bool pb_decode(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct);
 
+/* Same as pb_decode, except does not initialize the destination structure
+ * to default values. This is slightly faster if you need no default values
+ * and just do memset(struct, 0, sizeof(struct)) yourself.
+ */
+bool pb_decode_noinit(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct);
+
 /* --- Helper functions ---
  * You may want to use these from your caller or callbacks.
  */
 
+/* Decode the tag for the next field in the stream. Gives the wire type and
+ * field tag. At end of the message, returns false and sets eof to true. */
+bool pb_decode_tag(pb_istream_t *stream, pb_wire_type_t *wire_type, uint32_t *tag, bool *eof);
+
+/* Skip the field payload data, given the wire type. */
+bool pb_skip_field(pb_istream_t *stream, pb_wire_type_t wire_type);
+
+/* Decode an integer in the varint format. This works for bool, enum, int32,
+ * int64, uint32 and uint64 field types. */
 bool pb_decode_varint(pb_istream_t *stream, uint64_t *dest);
 
-bool pb_skip_varint(pb_istream_t *stream);
+/* Decode an integer in the zig-zagged svarint format. This works for sint32
-bool pb_skip_string(pb_istream_t *stream);
+ * and sint64. */
+bool pb_decode_svarint(pb_istream_t *stream, int64_t *dest);
 
-/* --- Field decoders ---
+/* Decode a fixed32, sfixed32 or float value. You need to pass a pointer to
- * Each decoder takes stream and field description, and a pointer to the field
+ * a 4-byte wide C variable. */
- * in the destination struct (dest = struct_addr + field->data_offset).
+bool pb_decode_fixed32(pb_istream_t *stream, void *dest);
- * For arrays, these functions are called repeatedly.
+
+/* Decode a fixed64, sfixed64 or double value. You need to pass a pointer to
+ * a 8-byte wide C variable. */
+bool pb_decode_fixed64(pb_istream_t *stream, void *dest);
+
+/* Make a limited-length substream for reading a PB_WT_STRING field. */
+bool pb_make_string_substream(pb_istream_t *stream, pb_istream_t *substream);
+void pb_close_string_substream(pb_istream_t *stream, pb_istream_t *substream);
+
+/* --- Internal functions ---
+ * These functions are not terribly useful for the average library user, but
+ * are exported to make the unit testing and extending nanopb easier.
  */
 
+#ifdef NANOPB_INTERNALS
 bool pb_dec_varint(pb_istream_t *stream, const pb_field_t *field, void *dest);
 bool pb_dec_svarint(pb_istream_t *stream, const pb_field_t *field, void *dest);
 bool pb_dec_fixed32(pb_istream_t *stream, const pb_field_t *field, void *dest);
@@ -68,4 +111,12 @@ bool pb_dec_bytes(pb_istream_t *stream, const pb_field_t *field, void *dest);
 bool pb_dec_string(pb_istream_t *stream, const pb_field_t *field, void *dest);
 bool pb_dec_submessage(pb_istream_t *stream, const pb_field_t *field, void *dest);
 
+bool pb_skip_varint(pb_istream_t *stream);
+bool pb_skip_string(pb_istream_t *stream);
+#endif
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
 #endif

pb_encode.c

@@ -8,14 +8,14 @@
 #include "pb_encode.h"
 #include <string.h>
 
-#ifdef __GNUC__
+/* The warn_unused_result attribute appeared first in gcc-3.4.0 */
-/* Verify that we remember to check all return values for proper error propagation */
+#if !defined(__GNUC__) || ( __GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
-#define checkreturn __attribute__((warn_unused_result))
+    #define checkreturn
 #else
-#define checkreturn
+    /* Verify that we remember to check all return values for proper error propagation */
+    #define checkreturn __attribute__((warn_unused_result))
 #endif
 
-
 typedef bool (*pb_encoder_t)(pb_ostream_t *stream, const pb_field_t *field, const void *src) checkreturn;
 
 /* --- Function pointers to field encoders ---
@@ -37,15 +37,22 @@ static const pb_encoder_t PB_ENCODERS[PB_LTYPES_COUNT] = {
 static bool checkreturn buf_write(pb_ostream_t *stream, const uint8_t *buf, size_t count)
 {
     uint8_t *dest = (uint8_t*)stream->state;
-    memcpy(dest, buf, count);
     stream->state = dest + count;
+    
+    while (count--)
+        *dest++ = *buf++;
+    
     return true;
 }
 
 pb_ostream_t pb_ostream_from_buffer(uint8_t *buf, size_t bufsize)
 {
     pb_ostream_t stream;
+#ifdef PB_BUFFER_ONLY
+    stream.callback = (void*)1; /* Just some marker value */
+#else
     stream.callback = &buf_write;
+#endif
     stream.state = buf;
     stream.max_size = bufsize;
     stream.bytes_written = 0;
@@ -58,9 +65,14 @@ bool checkreturn pb_write(pb_ostream_t *stream, const uint8_t *buf, size_t count
     {
         if (stream->bytes_written + count > stream->max_size)
             return false;
-        
+
+#ifdef PB_BUFFER_ONLY
+        if (!buf_write(stream, buf, count))
+            return false;
+#else        
         if (!stream->callback(stream, buf, count))
             return false;
+#endif
     }
     
     stream->bytes_written += count;
@@ -99,7 +111,7 @@ static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *fie
         }
         else
         {
-            pb_ostream_t sizestream = {0};
+            pb_ostream_t sizestream = {0,0,0,0};
             p = pData;
             for (i = 0; i < count; i++)
             {
@@ -110,7 +122,7 @@ static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *fie
             size = sizestream.bytes_written;
         }
         
-        if (!pb_encode_varint(stream, size))
+        if (!pb_encode_varint(stream, (uint64_t)size))
             return false;
         
         if (stream->callback == NULL)
@@ -141,58 +153,89 @@ static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *fie
     return true;
 }
 
+bool checkreturn encode_static_field(pb_ostream_t *stream, const pb_field_t *field, const void *pData)
+{
+    pb_encoder_t func;
+    const void *pSize;
+    
+    func = PB_ENCODERS[PB_LTYPE(field->type)];
+    pSize = (const char*)pData + field->size_offset;
+    
+    switch (PB_HTYPE(field->type))
+    {
+        case PB_HTYPE_REQUIRED:
+            if (!pb_encode_tag_for_field(stream, field))
+                return false;
+            if (!func(stream, field, pData))
+                return false;
+            break;
+        
+        case PB_HTYPE_OPTIONAL:
+            if (*(const bool*)pSize)
+            {
+                if (!pb_encode_tag_for_field(stream, field))
+                    return false;
+            
+                if (!func(stream, field, pData))
+                    return false;
+            }
+            break;
+        
+        case PB_HTYPE_REPEATED:
+            if (!encode_array(stream, field, pData, *(const size_t*)pSize, func))
+                return false;
+            break;
+        
+        default:
+            return false;
+    }
+    
+    return true;
+}
+
+bool checkreturn encode_callback_field(pb_ostream_t *stream, const pb_field_t *field, const void *pData)
+{
+    const pb_callback_t *callback = (const pb_callback_t*)pData;
+    if (callback->funcs.encode != NULL)
+    {
+        if (!callback->funcs.encode(stream, field, callback->arg))
+            return false;
+    }
+    return true;
+}
+
 bool checkreturn pb_encode(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct)
 {
     const pb_field_t *field = fields;
     const void *pData = src_struct;
-    const void *pSize;
     size_t prev_size = 0;
     
     while (field->tag != 0)
     {
-        pb_encoder_t func = PB_ENCODERS[PB_LTYPE(field->type)];
         pData = (const char*)pData + prev_size + field->data_offset;
-        pSize = (const char*)pData + field->size_offset;
-        
         prev_size = field->data_size;
-        if (PB_HTYPE(field->type) == PB_HTYPE_ARRAY)
+        
-            prev_size *= field->array_size;
+        /* Special case for static arrays */
-                
+        if (PB_ATYPE(field->type) == PB_ATYPE_STATIC &&
-        switch (PB_HTYPE(field->type))
+            PB_HTYPE(field->type) == PB_HTYPE_REPEATED)
         {
-            case PB_HTYPE_REQUIRED:
+            prev_size *= field->array_size;
-                if (!pb_encode_tag_for_field(stream, field))
+        }
-                    return false;
-                if (!func(stream, field, pData))
-                    return false;
-                break;
-            
-            case PB_HTYPE_OPTIONAL:
-                if (*(bool*)pSize)
-                {
-                    if (!pb_encode_tag_for_field(stream, field))
-                        return false;
                 
-                    if (!func(stream, field, pData))
+        switch (PB_ATYPE(field->type))
-                        return false;
+        {
-                }
+            case PB_ATYPE_STATIC:
-                break;
+                if (!encode_static_field(stream, field, pData))
-            
-            case PB_HTYPE_ARRAY:
-                if (!encode_array(stream, field, pData, *(size_t*)pSize, func))
                     return false;
                 break;
             
-            case PB_HTYPE_CALLBACK:
+            case PB_ATYPE_CALLBACK:
-            {
+                if (!encode_callback_field(stream, field, pData))
-                pb_callback_t *callback = (pb_callback_t*)pData;
+                    return false;
-                if (callback->funcs.encode != NULL)
-                {
-                    if (!callback->funcs.encode(stream, field, callback->arg))
-                        return false;
-                }
                 break;
-            }
+            
+            default:
+                return false;
         }
     
         field++;
@@ -205,7 +248,7 @@ bool checkreturn pb_encode(pb_ostream_t *stream, const pb_field_t fields[], cons
 bool checkreturn pb_encode_varint(pb_ostream_t *stream, uint64_t value)
 {
     uint8_t buffer[10];
-    int i = 0;
+    size_t i = 0;
     
     if (value == 0)
         return pb_write(stream, (uint8_t*)&value, 1);
@@ -225,9 +268,9 @@ bool checkreturn pb_encode_svarint(pb_ostream_t *stream, int64_t value)
 {
     uint64_t zigzagged;
     if (value < 0)
-        zigzagged = ~(value << 1);
+        zigzagged = (uint64_t)(~(value << 1));
     else
-        zigzagged = value << 1;
+        zigzagged = (uint64_t)(value << 1);
     
     return pb_encode_varint(stream, zigzagged);
 }
@@ -235,29 +278,40 @@ bool checkreturn pb_encode_svarint(pb_ostream_t *stream, int64_t value)
 bool checkreturn pb_encode_fixed32(pb_ostream_t *stream, const void *value)
 {
     #ifdef __BIG_ENDIAN__
-    uint8_t *bytes = value;
+    const uint8_t *bytes = value;
-    uint8_t lebytes[4] = {bytes[3], bytes[2], bytes[1], bytes[0]};
+    uint8_t lebytes[4];
+    lebytes[0] = bytes[3];
+    lebytes[1] = bytes[2];
+    lebytes[2] = bytes[1];
+    lebytes[3] = bytes[0];
     return pb_write(stream, lebytes, 4);
     #else
-    return pb_write(stream, (uint8_t*)value, 4);
+    return pb_write(stream, (const uint8_t*)value, 4);
     #endif
 }
 
 bool checkreturn pb_encode_fixed64(pb_ostream_t *stream, const void *value)
 {
     #ifdef __BIG_ENDIAN__
-    uint8_t *bytes[8] = value;
+    const uint8_t *bytes = value;
-    uint8_t lebytes[8] = {bytes[7], bytes[6], bytes[5], bytes[4], 
+    uint8_t lebytes[8];
-                          bytes[3], bytes[2], bytes[1], bytes[0]};
+    lebytes[0] = bytes[7];
+    lebytes[1] = bytes[6];
+    lebytes[2] = bytes[5];
+    lebytes[3] = bytes[4];
+    lebytes[4] = bytes[3];
+    lebytes[5] = bytes[2];
+    lebytes[6] = bytes[1];
+    lebytes[7] = bytes[0];
     return pb_write(stream, lebytes, 8);
     #else
-    return pb_write(stream, (uint8_t*)value, 8);
+    return pb_write(stream, (const uint8_t*)value, 8);
     #endif
 }
 
-bool checkreturn pb_encode_tag(pb_ostream_t *stream, pb_wire_type_t wiretype, int field_number)
+bool checkreturn pb_encode_tag(pb_ostream_t *stream, pb_wire_type_t wiretype, uint32_t field_number)
 {
-    int tag = wiretype | (field_number << 3);
+    uint64_t tag = wiretype | (field_number << 3);
     return pb_encode_varint(stream, tag);
 }
 
@@ -294,7 +348,7 @@ bool checkreturn pb_encode_tag_for_field(pb_ostream_t *stream, const pb_field_t
 
 bool checkreturn pb_encode_string(pb_ostream_t *stream, const uint8_t *buffer, size_t size)
 {
-    if (!pb_encode_varint(stream, size))
+    if (!pb_encode_varint(stream, (uint64_t)size))
         return false;
     
     return pb_write(stream, buffer, size);
@@ -303,7 +357,7 @@ bool checkreturn pb_encode_string(pb_ostream_t *stream, const uint8_t *buffer, s
 bool checkreturn pb_encode_submessage(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct)
 {
     /* First calculate the message size using a non-writing substream. */
-    pb_ostream_t substream = {0};
+    pb_ostream_t substream = {0,0,0,0};
     size_t size;
     bool status;
     
@@ -312,7 +366,7 @@ bool checkreturn pb_encode_submessage(pb_ostream_t *stream, const pb_field_t fie
     
     size = substream.bytes_written;
     
-    if (!pb_encode_varint(stream, size))
+    if (!pb_encode_varint(stream, (uint64_t)size))
         return false;
     
     if (stream->callback == NULL)
@@ -347,10 +401,10 @@ bool checkreturn pb_enc_varint(pb_ostream_t *stream, const pb_field_t *field, co
     
     switch (field->data_size)
     {
-        case 1: value = *(uint8_t*)src; break;
+        case 1: value = *(const uint8_t*)src; break;
-        case 2: value = *(uint16_t*)src; break;
+        case 2: value = *(const uint16_t*)src; break;
-        case 4: value = *(uint32_t*)src; break;
+        case 4: value = *(const uint32_t*)src; break;
-        case 8: value = *(uint64_t*)src; break;
+        case 8: value = *(const uint64_t*)src; break;
         default: return false;
     }
     
@@ -359,12 +413,12 @@ bool checkreturn pb_enc_varint(pb_ostream_t *stream, const pb_field_t *field, co
 
 bool checkreturn pb_enc_svarint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
 {
-    uint64_t value = 0;
+    int64_t value = 0;
     
     switch (field->data_size)
     {
-        case 4: value = *(int32_t*)src; break;
+        case 4: value = *(const int32_t*)src; break;
-        case 8: value = *(int64_t*)src; break;
+        case 8: value = *(const int64_t*)src; break;
         default: return false;
     }
     
@@ -385,7 +439,7 @@ bool checkreturn pb_enc_fixed32(pb_ostream_t *stream, const pb_field_t *field, c
 
 bool checkreturn pb_enc_bytes(pb_ostream_t *stream, const pb_field_t *field, const void *src)
 {
-    pb_bytes_array_t *bytes = (pb_bytes_array_t*)src;
+    const pb_bytes_array_t *bytes = (const pb_bytes_array_t*)src;
     UNUSED(field);
     return pb_encode_string(stream, bytes->bytes, bytes->size);
 }
@@ -393,7 +447,7 @@ bool checkreturn pb_enc_bytes(pb_ostream_t *stream, const pb_field_t *field, con
 bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_t *field, const void *src)
 {
     UNUSED(field);
-    return pb_encode_string(stream, (uint8_t*)src, strlen((char*)src));
+    return pb_encode_string(stream, (const uint8_t*)src, strlen((const char*)src));
 }
 
 bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_t *field, const void *src)
@@ -401,6 +455,6 @@ bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_t *field
     if (field->ptr == NULL)
         return false;
     
-    return pb_encode_submessage(stream, (pb_field_t*)field->ptr, src);
+    return pb_encode_submessage(stream, (const pb_field_t*)field->ptr, src);
 }
 

pb_encode.h

@@ -9,6 +9,10 @@
 #include <stdbool.h>
 #include "pb.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Lightweight output stream.
  * You can provide callback for writing or use pb_ostream_from_buffer.
  * 
@@ -28,7 +32,17 @@
  */
 struct _pb_ostream_t
 {
+#ifdef PB_BUFFER_ONLY
+    /* Callback pointer is not used in buffer-only configuration.
+     * Having an int pointer here allows binary compatibility but
+     * gives an error if someone tries to assign callback function.
+     * Also, NULL pointer marks a 'sizing stream' that does not
+     * write anything.
+     */
+    int *callback;
+#else
     bool (*callback)(pb_ostream_t *stream, const uint8_t *buf, size_t count);
+#endif
     void *state; /* Free field for use by callback implementation */
     size_t max_size; /* Limit number of output bytes written (or use SIZE_MAX). */
     size_t bytes_written;
@@ -54,7 +68,7 @@ bool pb_encode_tag_for_field(pb_ostream_t *stream, const pb_field_t *field);
 
 /* Encode field header by manually specifing wire type. You need to use this if
  * you want to write out packed arrays from a callback field. */
-bool pb_encode_tag(pb_ostream_t *stream, pb_wire_type_t wiretype, int field_number);
+bool pb_encode_tag(pb_ostream_t *stream, pb_wire_type_t wiretype, uint32_t field_number);
 
 /* Encode an integer in the varint format.
  * This works for bool, enum, int32, int64, uint32 and uint64 field types. */
@@ -99,5 +113,8 @@ bool pb_enc_string(pb_ostream_t *stream, const pb_field_t *field, const void *sr
  * instead, it has the same functionality with a less confusing interface. */
 bool pb_enc_submessage(pb_ostream_t *stream, const pb_field_t *field, const void *src);
 
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
 
 #endif

tests/Makefile

@@ -1,32 +1,81 @@
-CFLAGS=-ansi -Wall -Werror -I .. -g -O0 --coverage
+CFLAGS=-ansi -Wall -Werror -I .. -g -O0
-LDFLAGS=--coverage
+DEPS=../pb_decode.h ../pb_encode.h ../pb.h person.pb.h \
-DEPS=../pb_decode.h ../pb_encode.h ../pb.h person.pb.h callbacks.pb.h unittests.h unittestproto.pb.h alltypes.pb.h
+	callbacks2.pb.h callbacks.pb.h unittests.h unittestproto.pb.h \
-TESTS=test_decode1 test_encode1 decode_unittests encode_unittests
+	alltypes.pb.h missing_fields.pb.h
+TESTS=  decode_unittests encode_unittests \
+	test_decode1 test_decode2 test_decode3 test_decode3_buf \
+	test_encode1 test_encode2 test_encode3 test_encode3_buf \
+	test_decode_callbacks test_encode_callbacks \
+	test_missing_fields test_no_messages test_funny_name \
+	test_multiple_files test_cxxcompile test_options \
+	bc_encode bc_decode
+
+# More strict checks for the core part of nanopb
+CC_VERSION=$(shell $(CC) -v 2>&1)
+CFLAGS_CORE=
+ifneq (,$(findstring gcc,$(CC_VERSION)))
+	CFLAGS_CORE=-pedantic -Wextra -Wcast-qual -Wlogical-op -Wconversion
+        CFLAGS+=--coverage
+        LDFLAGS+=--coverage
+endif
+ifneq (,$(findstring clang,$(CC_VERSION)))
+	CFLAGS_CORE=-pedantic -Wextra -Wcast-qual -Wconversion
+endif
 
 all: breakpoints $(TESTS) run_unittests
 
 clean:
-	rm -f $(TESTS) person.pb* alltypes.pb* *.o *.gcda *.gcno
+	rm -f $(TESTS) person.pb* alltypes.pb* *.o *.gcda *.gcno *.pb.h *.pb.c
+
+%.pb.o: %.pb.c %.pb.h
+	$(CC) $(CFLAGS) $(CFLAGS_CORE) -c -o $@ $<
 
 %.o: %.c
 %.o: %.c $(DEPS)
 	$(CC) $(CFLAGS) -c -o $@ $<
 
 pb_encode.o: ../pb_encode.c $(DEPS)
-	$(CC) $(CFLAGS) -c -o $@ $<
+	$(CC) $(CFLAGS) $(CFLAGS_CORE) -c -o $@ $<
 pb_decode.o: ../pb_decode.c $(DEPS)
-	$(CC) $(CFLAGS) -c -o $@ $<
+	$(CC) $(CFLAGS) $(CFLAGS_CORE) -c -o $@ $<
 
+# Test for compilability with c++ compiler
+
+pb_encode.cxx.o: ../pb_encode.c $(DEPS)
+	$(CXX) $(CFLAGS) $(CFLAGS_CORE) -c -o $@ $<
+pb_decode.cxx.o: ../pb_decode.c $(DEPS)
+	$(CXX) $(CFLAGS) $(CFLAGS_CORE) -c -o $@ $<
+
+# Test for PB_BUF_ONLY compilation option
+
+pb_encode.buf.o: ../pb_encode.c $(DEPS)
+	$(CC) -DPB_BUFFER_ONLY $(CFLAGS) $(CFLAGS_CORE) -c -o $@ $<
+pb_decode.buf.o: ../pb_decode.c $(DEPS)
+	$(CC) -DPB_BUFFER_ONLY $(CFLAGS) $(CFLAGS_CORE) -c -o $@ $<
+%.buf.o: %.c $(DEPS)
+	$(CC) -DPB_BUFFER_ONLY $(CFLAGS) -c -o $@ $<	
+test_encode3_buf: test_encode3.buf.o pb_encode.buf.o alltypes.pb.o
+	$(CC) $(LDFLAGS) $^ -o $@
+test_decode3_buf: test_decode3.buf.o pb_decode.buf.o alltypes.pb.o
+	$(CC) $(LDFLAGS) $^ -o $@
+
+test_cxxcompile: pb_encode.cxx.o pb_decode.cxx.o
 test_decode1: test_decode1.o pb_decode.o person.pb.o
 test_decode2: test_decode2.o pb_decode.o person.pb.o
 test_decode3: test_decode3.o pb_decode.o alltypes.pb.o
 test_encode1: test_encode1.o pb_encode.o person.pb.o
 test_encode2: test_encode2.o pb_encode.o person.pb.o
 test_encode3: test_encode3.o pb_encode.o alltypes.pb.o
+test_multiple_files: test_multiple_files.o pb_encode.o callbacks2.pb.o callbacks.pb.o
 test_decode_callbacks: test_decode_callbacks.o pb_decode.o callbacks.pb.o
 test_encode_callbacks: test_encode_callbacks.o pb_encode.o callbacks.pb.o
+test_missing_fields: test_missing_fields.o pb_encode.o pb_decode.o missing_fields.pb.o
 decode_unittests: decode_unittests.o pb_decode.o unittestproto.pb.o
 encode_unittests: encode_unittests.o pb_encode.o unittestproto.pb.o
+test_no_messages: no_messages.pb.h no_messages.pb.c no_messages.pb.o
+test_funny_name: funny-proto+name.pb.h funny-proto+name.pb.o
+bc_encode: bc_alltypes.pb.o pb_encode.o bc_encode.o
+bc_decode: bc_alltypes.pb.o pb_decode.o bc_decode.o
 
 %.pb: %.proto
 	protoc -I. -I../generator -I/usr/include -o$@ $<
@@ -41,7 +90,7 @@ coverage: run_unittests
 	gcov pb_encode.gcda
 	gcov pb_decode.gcda
 
-run_unittests: decode_unittests encode_unittests test_encode1 test_encode2 test_encode3 test_decode1 test_decode2 test_decode3 test_encode_callbacks test_decode_callbacks
+run_unittests: $(TESTS)
 	rm -f *.gcda
 	
 	./decode_unittests > /dev/null
@@ -56,11 +105,27 @@ run_unittests: decode_unittests encode_unittests test_encode1 test_encode2 test_
 	[ "`./test_encode2 | ./test_decode2`" = \
 	"`./test_encode2 | protoc --decode=Person -I. -I../generator -I/usr/include person.proto`" ]
 	
+	[ "`./test_decode2 < person_with_extra_field.pb`" = \
+	"`./test_encode2 | ./test_decode2`" ]
+	
 	[ "`./test_encode_callbacks | ./test_decode_callbacks`" = \
 	"`./test_encode_callbacks | protoc --decode=TestMessage callbacks.proto`" ]
 
 	./test_encode3 | ./test_decode3
-	./test_encode3 | protoc --decode=AllTypes -I. -I../generator -I/usr/include alltypes.proto >/dev/null
+	./test_encode3 1 | ./test_decode3 1
+	./test_encode3 1 | protoc --decode=AllTypes -I. -I../generator -I/usr/include alltypes.proto >/dev/null
+	./test_encode3_buf 1 | ./test_decode3_buf 1
+	./bc_encode | ./bc_decode
+	
+	./test_missing_fields
+
+test_options: options.pb.h options.expected options.pb.o
+	cat options.expected | while read -r p; do \
+	    if ! grep -q "$$p" $<; then \
+	        echo Expected: "$$p"; \
+	        exit 1; \
+	    fi \
+	done
 
 run_fuzztest: test_decode2
 	bash -c 'I=1; while true; do cat /dev/urandom | ./test_decode2 > /dev/null; I=$$(($$I+1)); echo -en "\r$$I"; done'

tests/alltypes.proto

@@ -1,11 +1,13 @@
 import "nanopb.proto";
 
 message SubMessage {
-    required string substuff1 = 1 [(nanopb).max_size = 16];
+    required string substuff1 = 1 [(nanopb).max_size = 16, default = "1"];
-    required int32 substuff2 = 2;
+    required int32 substuff2 = 2 [default = 2];
+    optional fixed32 substuff3 = 3 [default = 3];
 }
 
 enum MyEnum {
+    Zero = 0;
     First = 1;
     Second = 2;
     Truth = 42;
@@ -33,6 +35,49 @@ message AllTypes {
     required SubMessage req_submsg  = 16;
     required MyEnum     req_enum    = 17;
     
+    
+    repeated int32      rep_int32   = 21 [(nanopb).max_count = 5];
+    repeated int64      rep_int64   = 22 [(nanopb).max_count = 5];
+    repeated uint32     rep_uint32  = 23 [(nanopb).max_count = 5];
+    repeated uint64     rep_uint64  = 24 [(nanopb).max_count = 5];
+    repeated sint32     rep_sint32  = 25 [(nanopb).max_count = 5];
+    repeated sint64     rep_sint64  = 26 [(nanopb).max_count = 5];
+    repeated bool       rep_bool    = 27 [(nanopb).max_count = 5];
+    
+    repeated fixed32    rep_fixed32 = 28 [(nanopb).max_count = 5];
+    repeated sfixed32   rep_sfixed32= 29 [(nanopb).max_count = 5];
+    repeated float      rep_float   = 30 [(nanopb).max_count = 5];
+    
+    repeated fixed64    rep_fixed64 = 31 [(nanopb).max_count = 5];
+    repeated sfixed64   rep_sfixed64= 32 [(nanopb).max_count = 5];
+    repeated double     rep_double  = 33 [(nanopb).max_count = 5];
+    
+    repeated string     rep_string  = 34 [(nanopb).max_size = 16, (nanopb).max_count = 5];
+    repeated bytes      rep_bytes   = 35 [(nanopb).max_size = 16, (nanopb).max_count = 5];
+    repeated SubMessage rep_submsg  = 36 [(nanopb).max_count = 5];
+    repeated MyEnum     rep_enum    = 37 [(nanopb).max_count = 5];
+    
+    optional int32      opt_int32   = 41 [default = 4041];
+    optional int64      opt_int64   = 42 [default = 4042];
+    optional uint32     opt_uint32  = 43 [default = 4043];
+    optional uint64     opt_uint64  = 44 [default = 4044];
+    optional sint32     opt_sint32  = 45 [default = 4045];
+    optional sint64     opt_sint64  = 46 [default = 4046];
+    optional bool       opt_bool    = 47 [default = false];
+    
+    optional fixed32    opt_fixed32 = 48 [default = 4048];
+    optional sfixed32   opt_sfixed32= 49 [default = 4049];
+    optional float      opt_float   = 50 [default = 4050];
+    
+    optional fixed64    opt_fixed64 = 51 [default = 4051];
+    optional sfixed64   opt_sfixed64= 52 [default = 4052];
+    optional double     opt_double  = 53 [default = 4053];
+    
+    optional string     opt_string  = 54 [(nanopb).max_size = 16, default = "4054"];
+    optional bytes      opt_bytes   = 55 [(nanopb).max_size = 16, default = "4055"];
+    optional SubMessage opt_submsg  = 56;
+    optional MyEnum     opt_enum    = 57 [default = Second];
+
     // Just to make sure that the size of the fields has been calculated
     // properly, i.e. otherwise a bug in last field might not be detected.
     required int32      end = 99;

tests/bc_alltypes.pb.c

@@ -0,0 +1,93 @@
+/* Automatically generated nanopb constant definitions */
+/* Generated by 0.2.0-dev at Sun Feb 17 00:09:53 2013. */
+/* This is a file generated using nanopb-0.2.0-dev.
+ * It is used as a part of test suite in order to detect any
+ * incompatible changes made to the generator in future versions.
+ */
+
+#include "alltypes.pb.h"
+
+const char SubMessage_substuff1_default[16] = "1";
+const int32_t SubMessage_substuff2_default = 2;
+const uint32_t SubMessage_substuff3_default = 3;
+const int32_t AllTypes_opt_int32_default = 4041;
+const int64_t AllTypes_opt_int64_default = 4042;
+const uint32_t AllTypes_opt_uint32_default = 4043;
+const uint64_t AllTypes_opt_uint64_default = 4044;
+const int32_t AllTypes_opt_sint32_default = 4045;
+const int64_t AllTypes_opt_sint64_default = 4046;
+const bool AllTypes_opt_bool_default = false;
+const uint32_t AllTypes_opt_fixed32_default = 4048;
+const int32_t AllTypes_opt_sfixed32_default = 4049;
+const float AllTypes_opt_float_default = 4050;
+const uint64_t AllTypes_opt_fixed64_default = 4051;
+const int64_t AllTypes_opt_sfixed64_default = 4052;
+const double AllTypes_opt_double_default = 4053;
+const char AllTypes_opt_string_default[16] = "4054";
+const AllTypes_opt_bytes_t AllTypes_opt_bytes_default = {4, {0x34,0x30,0x35,0x35}};
+const MyEnum AllTypes_opt_enum_default = MyEnum_Second;
+
+
+const pb_field_t SubMessage_fields[4] = {
+    PB_FIELD(  1, STRING  , REQUIRED, STATIC, SubMessage, substuff1, substuff1, &SubMessage_substuff1_default),
+    PB_FIELD(  2, INT32   , REQUIRED, STATIC, SubMessage, substuff2, substuff1, &SubMessage_substuff2_default),
+    PB_FIELD(  3, FIXED32 , OPTIONAL, STATIC, SubMessage, substuff3, substuff2, &SubMessage_substuff3_default),
+    PB_LAST_FIELD
+};
+
+const pb_field_t AllTypes_fields[53] = {
+    PB_FIELD(  1, INT32   , REQUIRED, STATIC, AllTypes, req_int32, req_int32, 0),
+    PB_FIELD(  2, INT64   , REQUIRED, STATIC, AllTypes, req_int64, req_int32, 0),
+    PB_FIELD(  3, UINT32  , REQUIRED, STATIC, AllTypes, req_uint32, req_int64, 0),
+    PB_FIELD(  4, UINT64  , REQUIRED, STATIC, AllTypes, req_uint64, req_uint32, 0),
+    PB_FIELD(  5, SINT32  , REQUIRED, STATIC, AllTypes, req_sint32, req_uint64, 0),
+    PB_FIELD(  6, SINT64  , REQUIRED, STATIC, AllTypes, req_sint64, req_sint32, 0),
+    PB_FIELD(  7, BOOL    , REQUIRED, STATIC, AllTypes, req_bool, req_sint64, 0),
+    PB_FIELD(  8, FIXED32 , REQUIRED, STATIC, AllTypes, req_fixed32, req_bool, 0),
+    PB_FIELD(  9, SFIXED32, REQUIRED, STATIC, AllTypes, req_sfixed32, req_fixed32, 0),
+    PB_FIELD( 10, FLOAT   , REQUIRED, STATIC, AllTypes, req_float, req_sfixed32, 0),
+    PB_FIELD( 11, FIXED64 , REQUIRED, STATIC, AllTypes, req_fixed64, req_float, 0),
+    PB_FIELD( 12, SFIXED64, REQUIRED, STATIC, AllTypes, req_sfixed64, req_fixed64, 0),
+    PB_FIELD( 13, DOUBLE  , REQUIRED, STATIC, AllTypes, req_double, req_sfixed64, 0),
+    PB_FIELD( 14, STRING  , REQUIRED, STATIC, AllTypes, req_string, req_double, 0),
+    PB_FIELD( 15, BYTES   , REQUIRED, STATIC, AllTypes, req_bytes, req_string, 0),
+    PB_FIELD( 16, MESSAGE , REQUIRED, STATIC, AllTypes, req_submsg, req_bytes, &SubMessage_fields),
+    PB_FIELD( 17, ENUM    , REQUIRED, STATIC, AllTypes, req_enum, req_submsg, 0),
+    PB_FIELD( 21, INT32   , REPEATED, STATIC, AllTypes, rep_int32, req_enum, 0),
+    PB_FIELD( 22, INT64   , REPEATED, STATIC, AllTypes, rep_int64, rep_int32, 0),
+    PB_FIELD( 23, UINT32  , REPEATED, STATIC, AllTypes, rep_uint32, rep_int64, 0),
+    PB_FIELD( 24, UINT64  , REPEATED, STATIC, AllTypes, rep_uint64, rep_uint32, 0),
+    PB_FIELD( 25, SINT32  , REPEATED, STATIC, AllTypes, rep_sint32, rep_uint64, 0),
+    PB_FIELD( 26, SINT64  , REPEATED, STATIC, AllTypes, rep_sint64, rep_sint32, 0),
+    PB_FIELD( 27, BOOL    , REPEATED, STATIC, AllTypes, rep_bool, rep_sint64, 0),
+    PB_FIELD( 28, FIXED32 , REPEATED, STATIC, AllTypes, rep_fixed32, rep_bool, 0),
+    PB_FIELD( 29, SFIXED32, REPEATED, STATIC, AllTypes, rep_sfixed32, rep_fixed32, 0),
+    PB_FIELD( 30, FLOAT   , REPEATED, STATIC, AllTypes, rep_float, rep_sfixed32, 0),
+    PB_FIELD( 31, FIXED64 , REPEATED, STATIC, AllTypes, rep_fixed64, rep_float, 0),
+    PB_FIELD( 32, SFIXED64, REPEATED, STATIC, AllTypes, rep_sfixed64, rep_fixed64, 0),
+    PB_FIELD( 33, DOUBLE  , REPEATED, STATIC, AllTypes, rep_double, rep_sfixed64, 0),
+    PB_FIELD( 34, STRING  , REPEATED, STATIC, AllTypes, rep_string, rep_double, 0),
+    PB_FIELD( 35, BYTES   , REPEATED, STATIC, AllTypes, rep_bytes, rep_string, 0),
+    PB_FIELD( 36, MESSAGE , REPEATED, STATIC, AllTypes, rep_submsg, rep_bytes, &SubMessage_fields),
+    PB_FIELD( 37, ENUM    , REPEATED, STATIC, AllTypes, rep_enum, rep_submsg, 0),
+    PB_FIELD( 41, INT32   , OPTIONAL, STATIC, AllTypes, opt_int32, rep_enum, &AllTypes_opt_int32_default),
+    PB_FIELD( 42, INT64   , OPTIONAL, STATIC, AllTypes, opt_int64, opt_int32, &AllTypes_opt_int64_default),
+    PB_FIELD( 43, UINT32  , OPTIONAL, STATIC, AllTypes, opt_uint32, opt_int64, &AllTypes_opt_uint32_default),
+    PB_FIELD( 44, UINT64  , OPTIONAL, STATIC, AllTypes, opt_uint64, opt_uint32, &AllTypes_opt_uint64_default),
+    PB_FIELD( 45, SINT32  , OPTIONAL, STATIC, AllTypes, opt_sint32, opt_uint64, &AllTypes_opt_sint32_default),
+    PB_FIELD( 46, SINT64  , OPTIONAL, STATIC, AllTypes, opt_sint64, opt_sint32, &AllTypes_opt_sint64_default),
+    PB_FIELD( 47, BOOL    , OPTIONAL, STATIC, AllTypes, opt_bool, opt_sint64, &AllTypes_opt_bool_default),
+    PB_FIELD( 48, FIXED32 , OPTIONAL, STATIC, AllTypes, opt_fixed32, opt_bool, &AllTypes_opt_fixed32_default),
+    PB_FIELD( 49, SFIXED32, OPTIONAL, STATIC, AllTypes, opt_sfixed32, opt_fixed32, &AllTypes_opt_sfixed32_default),
+    PB_FIELD( 50, FLOAT   , OPTIONAL, STATIC, AllTypes, opt_float, opt_sfixed32, &AllTypes_opt_float_default),
+    PB_FIELD( 51, FIXED64 , OPTIONAL, STATIC, AllTypes, opt_fixed64, opt_float, &AllTypes_opt_fixed64_default),
+    PB_FIELD( 52, SFIXED64, OPTIONAL, STATIC, AllTypes, opt_sfixed64, opt_fixed64, &AllTypes_opt_sfixed64_default),
+    PB_FIELD( 53, DOUBLE  , OPTIONAL, STATIC, AllTypes, opt_double, opt_sfixed64, &AllTypes_opt_double_default),
+    PB_FIELD( 54, STRING  , OPTIONAL, STATIC, AllTypes, opt_string, opt_double, &AllTypes_opt_string_default),
+    PB_FIELD( 55, BYTES   , OPTIONAL, STATIC, AllTypes, opt_bytes, opt_string, &AllTypes_opt_bytes_default),
+    PB_FIELD( 56, MESSAGE , OPTIONAL, STATIC, AllTypes, opt_submsg, opt_bytes, &SubMessage_fields),
+    PB_FIELD( 57, ENUM    , OPTIONAL, STATIC, AllTypes, opt_enum, opt_submsg, &AllTypes_opt_enum_default),
+    PB_FIELD( 99, INT32   , REQUIRED, STATIC, AllTypes, end, opt_enum, 0),
+    PB_LAST_FIELD
+};
+

tests/bc_alltypes.pb.h

@@ -0,0 +1,178 @@
+/* Automatically generated nanopb header */
+/* This is a file generated using nanopb-0.2.0-dev.
+ * It is used as a part of test suite in order to detect any
+ * incompatible changes made to the generator in future versions.
+ */
+
+#ifndef _PB_ALLTYPES_PB_H_
+#define _PB_ALLTYPES_PB_H_
+#include <pb.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Enum definitions */
+typedef enum _MyEnum {
+    MyEnum_Zero = 0,
+    MyEnum_First = 1,
+    MyEnum_Second = 2,
+    MyEnum_Truth = 42
+} MyEnum;
+
+/* Struct definitions */
+typedef struct _SubMessage {
+    char substuff1[16];
+    int32_t substuff2;
+    bool has_substuff3;
+    uint32_t substuff3;
+} SubMessage;
+
+typedef struct {
+    size_t size;
+    uint8_t bytes[16];
+} AllTypes_req_bytes_t;
+
+typedef struct {
+    size_t size;
+    uint8_t bytes[16];
+} AllTypes_rep_bytes_t;
+
+typedef struct {
+    size_t size;
+    uint8_t bytes[16];
+} AllTypes_opt_bytes_t;
+
+typedef struct _AllTypes {
+    int32_t req_int32;
+    int64_t req_int64;
+    uint32_t req_uint32;
+    uint64_t req_uint64;
+    int32_t req_sint32;
+    int64_t req_sint64;
+    bool req_bool;
+    uint32_t req_fixed32;
+    int32_t req_sfixed32;
+    float req_float;
+    uint64_t req_fixed64;
+    int64_t req_sfixed64;
+    double req_double;
+    char req_string[16];
+    AllTypes_req_bytes_t req_bytes;
+    SubMessage req_submsg;
+    MyEnum req_enum;
+    size_t rep_int32_count;
+    int32_t rep_int32[5];
+    size_t rep_int64_count;
+    int64_t rep_int64[5];
+    size_t rep_uint32_count;
+    uint32_t rep_uint32[5];
+    size_t rep_uint64_count;
+    uint64_t rep_uint64[5];
+    size_t rep_sint32_count;
+    int32_t rep_sint32[5];
+    size_t rep_sint64_count;
+    int64_t rep_sint64[5];
+    size_t rep_bool_count;
+    bool rep_bool[5];
+    size_t rep_fixed32_count;
+    uint32_t rep_fixed32[5];
+    size_t rep_sfixed32_count;
+    int32_t rep_sfixed32[5];
+    size_t rep_float_count;
+    float rep_float[5];
+    size_t rep_fixed64_count;
+    uint64_t rep_fixed64[5];
+    size_t rep_sfixed64_count;
+    int64_t rep_sfixed64[5];
+    size_t rep_double_count;
+    double rep_double[5];
+    size_t rep_string_count;
+    char rep_string[5][16];
+    size_t rep_bytes_count;
+    AllTypes_rep_bytes_t rep_bytes[5];
+    size_t rep_submsg_count;
+    SubMessage rep_submsg[5];
+    size_t rep_enum_count;
+    MyEnum rep_enum[5];
+    bool has_opt_int32;
+    int32_t opt_int32;
+    bool has_opt_int64;
+    int64_t opt_int64;
+    bool has_opt_uint32;
+    uint32_t opt_uint32;
+    bool has_opt_uint64;
+    uint64_t opt_uint64;
+    bool has_opt_sint32;
+    int32_t opt_sint32;
+    bool has_opt_sint64;
+    int64_t opt_sint64;
+    bool has_opt_bool;
+    bool opt_bool;
+    bool has_opt_fixed32;
+    uint32_t opt_fixed32;
+    bool has_opt_sfixed32;
+    int32_t opt_sfixed32;
+    bool has_opt_float;
+    float opt_float;
+    bool has_opt_fixed64;
+    uint64_t opt_fixed64;
+    bool has_opt_sfixed64;
+    int64_t opt_sfixed64;
+    bool has_opt_double;
+    double opt_double;
+    bool has_opt_string;
+    char opt_string[16];
+    bool has_opt_bytes;
+    AllTypes_opt_bytes_t opt_bytes;
+    bool has_opt_submsg;
+    SubMessage opt_submsg;
+    bool has_opt_enum;
+    MyEnum opt_enum;
+    int32_t end;
+} AllTypes;
+
+/* Default values for struct fields */
+extern const char SubMessage_substuff1_default[16];
+extern const int32_t SubMessage_substuff2_default;
+extern const uint32_t SubMessage_substuff3_default;
+extern const int32_t AllTypes_opt_int32_default;
+extern const int64_t AllTypes_opt_int64_default;
+extern const uint32_t AllTypes_opt_uint32_default;
+extern const uint64_t AllTypes_opt_uint64_default;
+extern const int32_t AllTypes_opt_sint32_default;
+extern const int64_t AllTypes_opt_sint64_default;
+extern const bool AllTypes_opt_bool_default;
+extern const uint32_t AllTypes_opt_fixed32_default;
+extern const int32_t AllTypes_opt_sfixed32_default;
+extern const float AllTypes_opt_float_default;
+extern const uint64_t AllTypes_opt_fixed64_default;
+extern const int64_t AllTypes_opt_sfixed64_default;
+extern const double AllTypes_opt_double_default;
+extern const char AllTypes_opt_string_default[16];
+extern const AllTypes_opt_bytes_t AllTypes_opt_bytes_default;
+extern const MyEnum AllTypes_opt_enum_default;
+
+/* Struct field encoding specification for nanopb */
+extern const pb_field_t SubMessage_fields[4];
+extern const pb_field_t AllTypes_fields[53];
+
+/* Check that field information fits in pb_field_t */
+#if !defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)
+STATIC_ASSERT((pb_membersize(AllTypes, req_submsg) < 256 && pb_membersize(AllTypes, rep_submsg[0]) < 256 && pb_membersize(AllTypes, opt_submsg) < 256), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_SubMessage_AllTypes)
+#endif
+
+#if !defined(PB_FIELD_32BIT)
+STATIC_ASSERT((pb_membersize(AllTypes, req_submsg) < 65536 && pb_membersize(AllTypes, rep_submsg[0]) < 65536 && pb_membersize(AllTypes, opt_submsg) < 65536), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_SubMessage_AllTypes)
+#endif
+
+/* On some platforms (such as AVR), double is really float.
+ * These are not directly supported by nanopb, but see example_avr_double.
+ */
+STATIC_ASSERT(sizeof(double) == 8, DOUBLE_MUST_BE_8_BYTES)
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif

tests/bc_decode.c

@@ -0,0 +1,197 @@
+/* Tests the decoding of all types.
+ * This is a backwards-compatibility test, using bc_alltypes.pb.h.
+ * It is similar to test_decode3, but duplicated in order to allow
+ * test_decode3 to test any new features introduced later.
+ *
+ * Run e.g. ./bc_encode | ./bc_decode
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <pb_decode.h>
+#include "bc_alltypes.pb.h"
+
+#define TEST(x) if (!(x)) { \
+    printf("Test " #x " failed.\n"); \
+    return false; \
+    }
+
+/* This function is called once from main(), it handles
+   the decoding and checks the fields. */
+bool check_alltypes(pb_istream_t *stream, int mode)
+{
+    AllTypes alltypes;
+    
+    /* Fill with garbage to better detect initialization errors */
+    memset(&alltypes, 0xAA, sizeof(alltypes));
+    
+    if (!pb_decode(stream, AllTypes_fields, &alltypes))
+        return false;
+    
+    TEST(alltypes.req_int32         == -1001);
+    TEST(alltypes.req_int64         == -1002);
+    TEST(alltypes.req_uint32        == 1003);
+    TEST(alltypes.req_uint64        == 1004);
+    TEST(alltypes.req_sint32        == -1005);
+    TEST(alltypes.req_sint64        == -1006);
+    TEST(alltypes.req_bool          == true);
+    
+    TEST(alltypes.req_fixed32       == 1008);
+    TEST(alltypes.req_sfixed32      == -1009);
+    TEST(alltypes.req_float         == 1010.0f);
+    
+    TEST(alltypes.req_fixed64       == 1011);
+    TEST(alltypes.req_sfixed64      == -1012);
+    TEST(alltypes.req_double        == 1013.0f);
+    
+    TEST(strcmp(alltypes.req_string, "1014") == 0);
+    TEST(alltypes.req_bytes.size == 4);
+    TEST(memcmp(alltypes.req_bytes.bytes, "1015", 4) == 0);
+    TEST(strcmp(alltypes.req_submsg.substuff1, "1016") == 0);
+    TEST(alltypes.req_submsg.substuff2 == 1016);
+    TEST(alltypes.req_submsg.substuff3 == 3);
+    TEST(alltypes.req_enum == MyEnum_Truth);
+    
+    TEST(alltypes.rep_int32_count == 5 && alltypes.rep_int32[4] == -2001 && alltypes.rep_int32[0] == 0);
+    TEST(alltypes.rep_int64_count == 5 && alltypes.rep_int64[4] == -2002 && alltypes.rep_int64[0] == 0);
+    TEST(alltypes.rep_uint32_count == 5 && alltypes.rep_uint32[4] == 2003 && alltypes.rep_uint32[0] == 0);
+    TEST(alltypes.rep_uint64_count == 5 && alltypes.rep_uint64[4] == 2004 && alltypes.rep_uint64[0] == 0);
+    TEST(alltypes.rep_sint32_count == 5 && alltypes.rep_sint32[4] == -2005 && alltypes.rep_sint32[0] == 0);
+    TEST(alltypes.rep_sint64_count == 5 && alltypes.rep_sint64[4] == -2006 && alltypes.rep_sint64[0] == 0);
+    TEST(alltypes.rep_bool_count == 5 && alltypes.rep_bool[4] == true && alltypes.rep_bool[0] == false);
+    
+    TEST(alltypes.rep_fixed32_count == 5 && alltypes.rep_fixed32[4] == 2008 && alltypes.rep_fixed32[0] == 0);
+    TEST(alltypes.rep_sfixed32_count == 5 && alltypes.rep_sfixed32[4] == -2009 && alltypes.rep_sfixed32[0] == 0);
+    TEST(alltypes.rep_float_count == 5 && alltypes.rep_float[4] == 2010.0f && alltypes.rep_float[0] == 0.0f);
+    
+    TEST(alltypes.rep_fixed64_count == 5 && alltypes.rep_fixed64[4] == 2011 && alltypes.rep_fixed64[0] == 0);
+    TEST(alltypes.rep_sfixed64_count == 5 && alltypes.rep_sfixed64[4] == -2012 && alltypes.rep_sfixed64[0] == 0);
+    TEST(alltypes.rep_double_count == 5 && alltypes.rep_double[4] == 2013.0 && alltypes.rep_double[0] == 0.0);
+    
+    TEST(alltypes.rep_string_count == 5 && strcmp(alltypes.rep_string[4], "2014") == 0 && alltypes.rep_string[0][0] == '\0');
+    TEST(alltypes.rep_bytes_count == 5 && alltypes.rep_bytes[4].size == 4 && alltypes.rep_bytes[0].size == 0);
+    TEST(memcmp(alltypes.rep_bytes[4].bytes, "2015", 4) == 0);
+
+    TEST(alltypes.rep_submsg_count == 5);
+    TEST(strcmp(alltypes.rep_submsg[4].substuff1, "2016") == 0 && alltypes.rep_submsg[0].substuff1[0] == '\0');
+    TEST(alltypes.rep_submsg[4].substuff2 == 2016 && alltypes.rep_submsg[0].substuff2 == 0);
+    TEST(alltypes.rep_submsg[4].substuff3 == 2016 && alltypes.rep_submsg[0].substuff3 == 3);
+    
+    TEST(alltypes.rep_enum_count == 5 && alltypes.rep_enum[4] == MyEnum_Truth && alltypes.rep_enum[0] == MyEnum_Zero);
+    
+    if (mode == 0)
+    {
+        /* Expect default values */
+        TEST(alltypes.has_opt_int32     == false);
+        TEST(alltypes.opt_int32         == 4041);
+        TEST(alltypes.has_opt_int64     == false);
+        TEST(alltypes.opt_int64         == 4042);
+        TEST(alltypes.has_opt_uint32    == false);
+        TEST(alltypes.opt_uint32        == 4043);
+        TEST(alltypes.has_opt_uint64    == false);
+        TEST(alltypes.opt_uint64        == 4044);
+        TEST(alltypes.has_opt_sint32    == false);
+        TEST(alltypes.opt_sint32        == 4045);
+        TEST(alltypes.has_opt_sint64    == false);
+        TEST(alltypes.opt_sint64        == 4046);
+        TEST(alltypes.has_opt_bool      == false);
+        TEST(alltypes.opt_bool          == false);
+        
+        TEST(alltypes.has_opt_fixed32   == false);
+        TEST(alltypes.opt_fixed32       == 4048);
+        TEST(alltypes.has_opt_sfixed32  == false);
+        TEST(alltypes.opt_sfixed32      == 4049);
+        TEST(alltypes.has_opt_float     == false);
+        TEST(alltypes.opt_float         == 4050.0f);
+        
+        TEST(alltypes.has_opt_fixed64   == false);
+        TEST(alltypes.opt_fixed64       == 4051);
+        TEST(alltypes.has_opt_sfixed64  == false);
+        TEST(alltypes.opt_sfixed64      == 4052);
+        TEST(alltypes.has_opt_double    == false);
+        TEST(alltypes.opt_double        == 4053.0);
+        
+        TEST(alltypes.has_opt_string    == false);
+        TEST(strcmp(alltypes.opt_string, "4054") == 0);
+        TEST(alltypes.has_opt_bytes     == false);
+        TEST(alltypes.opt_bytes.size == 4);
+        TEST(memcmp(alltypes.opt_bytes.bytes, "4055", 4) == 0);
+        TEST(alltypes.has_opt_submsg    == false);
+        TEST(strcmp(alltypes.opt_submsg.substuff1, "1") == 0);
+        TEST(alltypes.opt_submsg.substuff2 == 2);
+        TEST(alltypes.opt_submsg.substuff3 == 3);
+        TEST(alltypes.has_opt_enum     == false);
+        TEST(alltypes.opt_enum == MyEnum_Second);
+    }
+    else
+    {
+        /* Expect filled-in values */
+        TEST(alltypes.has_opt_int32     == true);
+        TEST(alltypes.opt_int32         == 3041);
+        TEST(alltypes.has_opt_int64     == true);
+        TEST(alltypes.opt_int64         == 3042);
+        TEST(alltypes.has_opt_uint32    == true);
+        TEST(alltypes.opt_uint32        == 3043);
+        TEST(alltypes.has_opt_uint64    == true);
+        TEST(alltypes.opt_uint64        == 3044);
+        TEST(alltypes.has_opt_sint32    == true);
+        TEST(alltypes.opt_sint32        == 3045);
+        TEST(alltypes.has_opt_sint64    == true);
+        TEST(alltypes.opt_sint64        == 3046);
+        TEST(alltypes.has_opt_bool      == true);
+        TEST(alltypes.opt_bool          == true);
+        
+        TEST(alltypes.has_opt_fixed32   == true);
+        TEST(alltypes.opt_fixed32       == 3048);
+        TEST(alltypes.has_opt_sfixed32  == true);
+        TEST(alltypes.opt_sfixed32      == 3049);
+        TEST(alltypes.has_opt_float     == true);
+        TEST(alltypes.opt_float         == 3050.0f);
+        
+        TEST(alltypes.has_opt_fixed64   == true);
+        TEST(alltypes.opt_fixed64       == 3051);
+        TEST(alltypes.has_opt_sfixed64  == true);
+        TEST(alltypes.opt_sfixed64      == 3052);
+        TEST(alltypes.has_opt_double    == true);
+        TEST(alltypes.opt_double        == 3053.0);
+        
+        TEST(alltypes.has_opt_string    == true);
+        TEST(strcmp(alltypes.opt_string, "3054") == 0);
+        TEST(alltypes.has_opt_bytes     == true);
+        TEST(alltypes.opt_bytes.size == 4);
+        TEST(memcmp(alltypes.opt_bytes.bytes, "3055", 4) == 0);
+        TEST(alltypes.has_opt_submsg    == true);
+        TEST(strcmp(alltypes.opt_submsg.substuff1, "3056") == 0);
+        TEST(alltypes.opt_submsg.substuff2 == 3056);
+        TEST(alltypes.opt_submsg.substuff3 == 3);
+        TEST(alltypes.has_opt_enum      == true);
+        TEST(alltypes.opt_enum == MyEnum_Truth);
+    }
+    
+    TEST(alltypes.end == 1099);
+    
+    return true;
+}
+
+int main(int argc, char **argv)
+{
+    /* Whether to expect the optional values or the default values. */
+    int mode = (argc > 1) ? atoi(argv[1]) : 0;
+    
+    /* Read the data into buffer */
+    uint8_t buffer[1024];
+    size_t count = fread(buffer, 1, sizeof(buffer), stdin);
+    
+    /* Construct a pb_istream_t for reading from the buffer */
+    pb_istream_t stream = pb_istream_from_buffer(buffer, count);
+    
+    /* Decode and print out the stuff */
+    if (!check_alltypes(&stream, mode))
+    {
+        printf("Parsing failed: %s\n", PB_GET_ERROR(&stream));
+        return 1;
+    } else {
+        return 0;
+    }
+}

tests/bc_encode.c

@@ -0,0 +1,131 @@
+/* Attempts to test all the datatypes supported by ProtoBuf.
+ * This is a backwards-compatibility test, using bc_alltypes.pb.h.
+ * It is similar to test_encode3, but duplicated in order to allow
+ * test_encode3 to test any new features introduced later.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pb_encode.h>
+#include "bc_alltypes.pb.h"
+
+int main(int argc, char **argv)
+{
+    int mode = (argc > 1) ? atoi(argv[1]) : 0;
+    
+    /* Initialize the structure with constants */
+    AllTypes alltypes = {0};
+    
+    alltypes.req_int32         = -1001;
+    alltypes.req_int64         = -1002;
+    alltypes.req_uint32        = 1003;
+    alltypes.req_uint64        = 1004;
+    alltypes.req_sint32        = -1005;
+    alltypes.req_sint64        = -1006;
+    alltypes.req_bool          = true;
+    
+    alltypes.req_fixed32       = 1008;
+    alltypes.req_sfixed32      = -1009;
+    alltypes.req_float         = 1010.0f;
+    
+    alltypes.req_fixed64       = 1011;
+    alltypes.req_sfixed64      = -1012;
+    alltypes.req_double        = 1013.0;
+    
+    strcpy(alltypes.req_string, "1014");
+    alltypes.req_bytes.size = 4;
+    memcpy(alltypes.req_bytes.bytes, "1015", 4);
+    strcpy(alltypes.req_submsg.substuff1, "1016");
+    alltypes.req_submsg.substuff2 = 1016;
+    alltypes.req_enum = MyEnum_Truth;
+    
+    alltypes.rep_int32_count = 5; alltypes.rep_int32[4] = -2001;
+    alltypes.rep_int64_count = 5; alltypes.rep_int64[4] = -2002;
+    alltypes.rep_uint32_count = 5; alltypes.rep_uint32[4] = 2003;
+    alltypes.rep_uint64_count = 5; alltypes.rep_uint64[4] = 2004;
+    alltypes.rep_sint32_count = 5; alltypes.rep_sint32[4] = -2005;
+    alltypes.rep_sint64_count = 5; alltypes.rep_sint64[4] = -2006;
+    alltypes.rep_bool_count = 5; alltypes.rep_bool[4] = true;
+    
+    alltypes.rep_fixed32_count = 5; alltypes.rep_fixed32[4] = 2008;
+    alltypes.rep_sfixed32_count = 5; alltypes.rep_sfixed32[4] = -2009;
+    alltypes.rep_float_count = 5; alltypes.rep_float[4] = 2010.0f;
+    
+    alltypes.rep_fixed64_count = 5; alltypes.rep_fixed64[4] = 2011;
+    alltypes.rep_sfixed64_count = 5; alltypes.rep_sfixed64[4] = -2012;
+    alltypes.rep_double_count = 5; alltypes.rep_double[4] = 2013.0;
+    
+    alltypes.rep_string_count = 5; strcpy(alltypes.rep_string[4], "2014");
+    alltypes.rep_bytes_count = 5; alltypes.rep_bytes[4].size = 4;
+    memcpy(alltypes.rep_bytes[4].bytes, "2015", 4);
+
+    alltypes.rep_submsg_count = 5;
+    strcpy(alltypes.rep_submsg[4].substuff1, "2016");
+    alltypes.rep_submsg[4].substuff2 = 2016;
+    alltypes.rep_submsg[4].has_substuff3 = true;
+    alltypes.rep_submsg[4].substuff3 = 2016;
+    
+    alltypes.rep_enum_count = 5; alltypes.rep_enum[4] = MyEnum_Truth;
+    
+    if (mode != 0)
+    {
+        /* Fill in values for optional fields */
+        alltypes.has_opt_int32 = true;
+        alltypes.opt_int32         = 3041;
+        alltypes.has_opt_int64 = true;
+        alltypes.opt_int64         = 3042;
+        alltypes.has_opt_uint32 = true;
+        alltypes.opt_uint32        = 3043;
+        alltypes.has_opt_uint64 = true;
+        alltypes.opt_uint64        = 3044;
+        alltypes.has_opt_sint32 = true;
+        alltypes.opt_sint32        = 3045;
+        alltypes.has_opt_sint64 = true;
+        alltypes.opt_sint64        = 3046;
+        alltypes.has_opt_bool = true;
+        alltypes.opt_bool          = true;
+        
+        alltypes.has_opt_fixed32 = true;
+        alltypes.opt_fixed32       = 3048;
+        alltypes.has_opt_sfixed32 = true;
+        alltypes.opt_sfixed32      = 3049;
+        alltypes.has_opt_float = true;
+        alltypes.opt_float         = 3050.0f;
+        
+        alltypes.has_opt_fixed64 = true;
+        alltypes.opt_fixed64       = 3051;
+        alltypes.has_opt_sfixed64 = true;
+        alltypes.opt_sfixed64      = 3052;
+        alltypes.has_opt_double = true;
+        alltypes.opt_double        = 3053.0;
+        
+        alltypes.has_opt_string = true;
+        strcpy(alltypes.opt_string, "3054");
+        alltypes.has_opt_bytes = true;
+        alltypes.opt_bytes.size = 4;
+        memcpy(alltypes.opt_bytes.bytes, "3055", 4);
+        alltypes.has_opt_submsg = true;
+        strcpy(alltypes.opt_submsg.substuff1, "3056");
+        alltypes.opt_submsg.substuff2 = 3056;
+        alltypes.has_opt_enum = true;
+        alltypes.opt_enum = MyEnum_Truth;
+    }
+    
+    alltypes.end = 1099;
+    
+    uint8_t buffer[1024];
+    pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
+    
+    /* Now encode it and check if we succeeded. */
+    if (pb_encode(&stream, AllTypes_fields, &alltypes))
+    {
+        fwrite(buffer, 1, stream.bytes_written, stdout);
+        return 0; /* Success */
+    }
+    else
+    {
+        fprintf(stderr, "Encoding failed!\n");
+        return 1; /* Failure */
+    }
+}

tests/callbacks2.proto

@@ -0,0 +1,9 @@
+// Test if including generated header file for this file + implicit include of
+// callbacks.pb.h still compiles. Used with test_compiles.c.
+import "callbacks.proto";
+
+message Callback2Message {
+    required TestMessage tstmsg = 1;
+    required SubMessage submsg = 2;
+}
+

tests/decode_unittests.c

@@ -1,3 +1,5 @@
+#define NANOPB_INTERNALS
+
 #include <stdio.h>
 #include <string.h>
 #include "pb_decode.h"

tests/missing_fields.proto

@@ -0,0 +1,138 @@
+/* Test for one missing field among many */
+
+message AllFields
+{
+    required int32 field1 = 1;
+    required int32 field2 = 2;
+    required int32 field3 = 3;
+    required int32 field4 = 4;
+    required int32 field5 = 5;
+    required int32 field6 = 6;
+    required int32 field7 = 7;
+    required int32 field8 = 8;
+    required int32 field9 = 9;
+    required int32 field10 = 10;
+    required int32 field11 = 11;
+    required int32 field12 = 12;
+    required int32 field13 = 13;
+    required int32 field14 = 14;
+    required int32 field15 = 15;
+    required int32 field16 = 16;
+    required int32 field17 = 17;
+    required int32 field18 = 18;
+    required int32 field19 = 19;
+    required int32 field20 = 20;
+    required int32 field21 = 21;
+    required int32 field22 = 22;
+    required int32 field23 = 23;
+    required int32 field24 = 24;
+    required int32 field25 = 25;
+    required int32 field26 = 26;
+    required int32 field27 = 27;
+    required int32 field28 = 28;
+    required int32 field29 = 29;
+    required int32 field30 = 30;
+    required int32 field31 = 31;
+    required int32 field32 = 32;
+    required int32 field33 = 33;
+    required int32 field34 = 34;
+    required int32 field35 = 35;
+    required int32 field36 = 36;
+    required int32 field37 = 37;
+    required int32 field38 = 38;
+    required int32 field39 = 39;
+    required int32 field40 = 40;
+    required int32 field41 = 41;
+    required int32 field42 = 42;
+    required int32 field43 = 43;
+    required int32 field44 = 44;
+    required int32 field45 = 45;
+    required int32 field46 = 46;
+    required int32 field47 = 47;
+    required int32 field48 = 48;
+    required int32 field49 = 49;
+    required int32 field50 = 50;
+    required int32 field51 = 51;
+    required int32 field52 = 52;
+    required int32 field53 = 53;
+    required int32 field54 = 54;
+    required int32 field55 = 55;
+    required int32 field56 = 56;
+    required int32 field57 = 57;
+    required int32 field58 = 58;
+    required int32 field59 = 59;
+    required int32 field60 = 60;
+    required int32 field61 = 61;
+    required int32 field62 = 62;
+    required int32 field63 = 63;
+    required int32 field64 = 64;
+}
+
+message MissingField
+{
+    required int32 field1 = 1;
+    required int32 field2 = 2;
+    required int32 field3 = 3;
+    required int32 field4 = 4;
+    required int32 field5 = 5;
+    required int32 field6 = 6;
+    required int32 field7 = 7;
+    required int32 field8 = 8;
+    required int32 field9 = 9;
+    required int32 field10 = 10;
+    required int32 field11 = 11;
+    required int32 field12 = 12;
+    required int32 field13 = 13;
+    required int32 field14 = 14;
+    required int32 field15 = 15;
+    required int32 field16 = 16;
+    required int32 field17 = 17;
+    required int32 field18 = 18;
+    required int32 field19 = 19;
+    required int32 field20 = 20;
+    required int32 field21 = 21;
+    required int32 field22 = 22;
+    required int32 field23 = 23;
+    required int32 field24 = 24;
+    required int32 field25 = 25;
+    required int32 field26 = 26;
+    required int32 field27 = 27;
+    required int32 field28 = 28;
+    required int32 field29 = 29;
+    required int32 field30 = 30;
+    required int32 field31 = 31;
+    required int32 field32 = 32;
+    required int32 field33 = 33;
+    required int32 field34 = 34;
+    required int32 field35 = 35;
+    required int32 field36 = 36;
+    required int32 field37 = 37;
+    required int32 field38 = 38;
+    required int32 field39 = 39;
+    required int32 field40 = 40;
+    required int32 field41 = 41;
+    required int32 field42 = 42;
+    required int32 field43 = 43;
+    required int32 field44 = 44;
+    required int32 field45 = 45;
+    required int32 field46 = 46;
+    required int32 field47 = 47;
+    required int32 field48 = 48;
+    required int32 field49 = 49;
+    required int32 field50 = 50;
+    required int32 field51 = 51;
+    required int32 field52 = 52;
+    required int32 field53 = 53;
+    required int32 field54 = 54;
+    required int32 field55 = 55;
+    required int32 field56 = 56;
+    required int32 field57 = 57;
+    required int32 field58 = 58;
+    required int32 field59 = 59;
+    required int32 field60 = 60;
+    required int32 field61 = 61;
+    required int32 field62 = 62;
+/*    required int32 field63 = 63; */
+    required int32 field64 = 64;
+}
+

tests/no_messages.proto

@@ -0,0 +1,7 @@
+/* Test that a file without any messages works. */
+
+enum Test {
+    First = 1;
+}
+
+

tests/options.expected

@@ -0,0 +1,7 @@
+char filesize\[20\];
+char msgsize\[30\];
+char fieldsize\[40\];
+pb_callback_t int32_callback;
+\sEnumValue1 = 1
+Message5_EnumValue1
+} pb_packed my_packed_struct;

tests/options.proto

@@ -0,0 +1,73 @@
+/* Test nanopb option parsing.
+ * options.expected lists the patterns that are searched for in the output.
+ */
+
+import "nanopb.proto";
+
+// File level options
+option (nanopb_fileopt).max_size = 20;
+
+message Message1
+{
+    required string filesize = 1;
+}
+
+// Message level options
+message Message2
+{
+    option (nanopb_msgopt).max_size = 30;
+    required string msgsize = 1;
+}
+
+// Field level options
+message Message3
+{
+    required string fieldsize = 1 [(nanopb).max_size = 40];
+}
+
+// Forced callback field
+message Message4
+{
+    required int32 int32_callback = 1 [(nanopb).type = FT_CALLBACK];
+}
+
+// Short enum names
+enum Enum1
+{
+    option (nanopb_enumopt).long_names = false;
+    EnumValue1 = 1;
+    EnumValue2 = 2;
+}
+
+message EnumTest
+{
+    required Enum1 field = 1 [default = EnumValue2];
+}
+
+// Short enum names inside message
+message Message5
+{
+    enum Enum2
+    {
+       option (nanopb_enumopt).long_names = false;
+       EnumValue1 = 1;
+    }
+    required Enum2 field = 1 [default = EnumValue1];
+}
+
+// Packed structure
+message my_packed_struct
+{
+    option (nanopb_msgopt).packed_struct = true;
+    optional int32 myfield = 1;
+}
+
+// Message with ignored field
+// Note: doesn't really test if the field is missing in the output,
+// but atleast tests that the output compiles.
+message Message6
+{
+    required int32 field1 = 1;
+    optional int32 field2 = 2 [(nanopb).type = FT_IGNORE];
+}
+

tests/test_decode1.c

@@ -63,13 +63,19 @@ int main()
     uint8_t buffer[512];
     size_t count = fread(buffer, 1, sizeof(buffer), stdin);
     
+    if (!feof(stdin))
+    {
+    	printf("Message does not fit in buffer\n");
+    	return 1;
+    }
+    
     /* Construct a pb_istream_t for reading from the buffer */
     pb_istream_t stream = pb_istream_from_buffer(buffer, count);
     
     /* Decode and print out the stuff */
     if (!print_person(&stream))
     {
-        printf("Parsing failed.\n");
+        printf("Parsing failed: %s\n", PB_GET_ERROR(&stream));
         return 1;
     } else {
         return 0;

tests/test_decode2.c

@@ -59,13 +59,6 @@ bool callback(pb_istream_t *stream, uint8_t *buf, size_t count)
     FILE *file = (FILE*)stream->state;
     bool status;
     
-    if (buf == NULL)
-    {
-       /* Skipping data */
-        while (count-- && fgetc(file) != EOF);
-        return count == 0;
-    }
-    
     status = (fread(buf, 1, count, file) == count);
     
     if (feof(file))
@@ -82,7 +75,7 @@ int main()
     pb_istream_t stream = {&callback, stdin, 10000};
     if (!print_person(&stream))
     {
-        printf("Parsing failed.\n");
+        printf("Parsing failed: %s\n", PB_GET_ERROR(&stream));
         return 1;
     } else {
         return 0;

tests/test_decode3.c

@@ -1,10 +1,11 @@
-/* Tests the decoding of all types. Currently only in the 'required' variety.
+/* Tests the decoding of all types.
  * This is the counterpart of test_encode3.
  * Run e.g. ./test_encode3 | ./test_decode3
  */
 
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
 #include <pb_decode.h>
 #include "alltypes.pb.h"
 
@@ -15,27 +16,30 @@
 
 /* This function is called once from main(), it handles
    the decoding and checks the fields. */
-bool check_alltypes(pb_istream_t *stream)
+bool check_alltypes(pb_istream_t *stream, int mode)
 {
-    AllTypes alltypes = {};
+    AllTypes alltypes;
+    
+    /* Fill with garbage to better detect initialization errors */
+    memset(&alltypes, 0xAA, sizeof(alltypes));
     
     if (!pb_decode(stream, AllTypes_fields, &alltypes))
         return false;
     
-    TEST(alltypes.req_int32         == 1001);
+    TEST(alltypes.req_int32         == -1001);
-    TEST(alltypes.req_int64         == 1002);
+    TEST(alltypes.req_int64         == -1002);
     TEST(alltypes.req_uint32        == 1003);
     TEST(alltypes.req_uint64        == 1004);
-    TEST(alltypes.req_sint32        == 1005);
+    TEST(alltypes.req_sint32        == -1005);
-    TEST(alltypes.req_sint64        == 1006);
+    TEST(alltypes.req_sint64        == -1006);
     TEST(alltypes.req_bool          == true);
     
     TEST(alltypes.req_fixed32       == 1008);
-    TEST(alltypes.req_sfixed32      == 1009);
+    TEST(alltypes.req_sfixed32      == -1009);
     TEST(alltypes.req_float         == 1010.0f);
     
     TEST(alltypes.req_fixed64       == 1011);
-    TEST(alltypes.req_sfixed64      == 1012);
+    TEST(alltypes.req_sfixed64      == -1012);
     TEST(alltypes.req_double        == 1013.0f);
     
     TEST(strcmp(alltypes.req_string, "1014") == 0);
@@ -43,26 +47,146 @@ bool check_alltypes(pb_istream_t *stream)
     TEST(memcmp(alltypes.req_bytes.bytes, "1015", 4) == 0);
     TEST(strcmp(alltypes.req_submsg.substuff1, "1016") == 0);
     TEST(alltypes.req_submsg.substuff2 == 1016);
+    TEST(alltypes.req_submsg.substuff3 == 3);
     TEST(alltypes.req_enum == MyEnum_Truth);
     
+    TEST(alltypes.rep_int32_count == 5 && alltypes.rep_int32[4] == -2001 && alltypes.rep_int32[0] == 0);
+    TEST(alltypes.rep_int64_count == 5 && alltypes.rep_int64[4] == -2002 && alltypes.rep_int64[0] == 0);
+    TEST(alltypes.rep_uint32_count == 5 && alltypes.rep_uint32[4] == 2003 && alltypes.rep_uint32[0] == 0);
+    TEST(alltypes.rep_uint64_count == 5 && alltypes.rep_uint64[4] == 2004 && alltypes.rep_uint64[0] == 0);
+    TEST(alltypes.rep_sint32_count == 5 && alltypes.rep_sint32[4] == -2005 && alltypes.rep_sint32[0] == 0);
+    TEST(alltypes.rep_sint64_count == 5 && alltypes.rep_sint64[4] == -2006 && alltypes.rep_sint64[0] == 0);
+    TEST(alltypes.rep_bool_count == 5 && alltypes.rep_bool[4] == true && alltypes.rep_bool[0] == false);
+    
+    TEST(alltypes.rep_fixed32_count == 5 && alltypes.rep_fixed32[4] == 2008 && alltypes.rep_fixed32[0] == 0);
+    TEST(alltypes.rep_sfixed32_count == 5 && alltypes.rep_sfixed32[4] == -2009 && alltypes.rep_sfixed32[0] == 0);
+    TEST(alltypes.rep_float_count == 5 && alltypes.rep_float[4] == 2010.0f && alltypes.rep_float[0] == 0.0f);
+    
+    TEST(alltypes.rep_fixed64_count == 5 && alltypes.rep_fixed64[4] == 2011 && alltypes.rep_fixed64[0] == 0);
+    TEST(alltypes.rep_sfixed64_count == 5 && alltypes.rep_sfixed64[4] == -2012 && alltypes.rep_sfixed64[0] == 0);
+    TEST(alltypes.rep_double_count == 5 && alltypes.rep_double[4] == 2013.0 && alltypes.rep_double[0] == 0.0);
+    
+    TEST(alltypes.rep_string_count == 5 && strcmp(alltypes.rep_string[4], "2014") == 0 && alltypes.rep_string[0][0] == '\0');
+    TEST(alltypes.rep_bytes_count == 5 && alltypes.rep_bytes[4].size == 4 && alltypes.rep_bytes[0].size == 0);
+    TEST(memcmp(alltypes.rep_bytes[4].bytes, "2015", 4) == 0);
+
+    TEST(alltypes.rep_submsg_count == 5);
+    TEST(strcmp(alltypes.rep_submsg[4].substuff1, "2016") == 0 && alltypes.rep_submsg[0].substuff1[0] == '\0');
+    TEST(alltypes.rep_submsg[4].substuff2 == 2016 && alltypes.rep_submsg[0].substuff2 == 0);
+    TEST(alltypes.rep_submsg[4].substuff3 == 2016 && alltypes.rep_submsg[0].substuff3 == 3);
+    
+    TEST(alltypes.rep_enum_count == 5 && alltypes.rep_enum[4] == MyEnum_Truth && alltypes.rep_enum[0] == MyEnum_Zero);
+    
+    if (mode == 0)
+    {
+        /* Expect default values */
+        TEST(alltypes.has_opt_int32     == false);
+        TEST(alltypes.opt_int32         == 4041);
+        TEST(alltypes.has_opt_int64     == false);
+        TEST(alltypes.opt_int64         == 4042);
+        TEST(alltypes.has_opt_uint32    == false);
+        TEST(alltypes.opt_uint32        == 4043);
+        TEST(alltypes.has_opt_uint64    == false);
+        TEST(alltypes.opt_uint64        == 4044);
+        TEST(alltypes.has_opt_sint32    == false);
+        TEST(alltypes.opt_sint32        == 4045);
+        TEST(alltypes.has_opt_sint64    == false);
+        TEST(alltypes.opt_sint64        == 4046);
+        TEST(alltypes.has_opt_bool      == false);
+        TEST(alltypes.opt_bool          == false);
+        
+        TEST(alltypes.has_opt_fixed32   == false);
+        TEST(alltypes.opt_fixed32       == 4048);
+        TEST(alltypes.has_opt_sfixed32  == false);
+        TEST(alltypes.opt_sfixed32      == 4049);
+        TEST(alltypes.has_opt_float     == false);
+        TEST(alltypes.opt_float         == 4050.0f);
+        
+        TEST(alltypes.has_opt_fixed64   == false);
+        TEST(alltypes.opt_fixed64       == 4051);
+        TEST(alltypes.has_opt_sfixed64  == false);
+        TEST(alltypes.opt_sfixed64      == 4052);
+        TEST(alltypes.has_opt_double    == false);
+        TEST(alltypes.opt_double        == 4053.0);
+        
+        TEST(alltypes.has_opt_string    == false);
+        TEST(strcmp(alltypes.opt_string, "4054") == 0);
+        TEST(alltypes.has_opt_bytes     == false);
+        TEST(alltypes.opt_bytes.size == 4);
+        TEST(memcmp(alltypes.opt_bytes.bytes, "4055", 4) == 0);
+        TEST(alltypes.has_opt_submsg    == false);
+        TEST(strcmp(alltypes.opt_submsg.substuff1, "1") == 0);
+        TEST(alltypes.opt_submsg.substuff2 == 2);
+        TEST(alltypes.opt_submsg.substuff3 == 3);
+        TEST(alltypes.has_opt_enum     == false);
+        TEST(alltypes.opt_enum == MyEnum_Second);
+    }
+    else
+    {
+        /* Expect filled-in values */
+        TEST(alltypes.has_opt_int32     == true);
+        TEST(alltypes.opt_int32         == 3041);
+        TEST(alltypes.has_opt_int64     == true);
+        TEST(alltypes.opt_int64         == 3042);
+        TEST(alltypes.has_opt_uint32    == true);
+        TEST(alltypes.opt_uint32        == 3043);
+        TEST(alltypes.has_opt_uint64    == true);
+        TEST(alltypes.opt_uint64        == 3044);
+        TEST(alltypes.has_opt_sint32    == true);
+        TEST(alltypes.opt_sint32        == 3045);
+        TEST(alltypes.has_opt_sint64    == true);
+        TEST(alltypes.opt_sint64        == 3046);
+        TEST(alltypes.has_opt_bool      == true);
+        TEST(alltypes.opt_bool          == true);
+        
+        TEST(alltypes.has_opt_fixed32   == true);
+        TEST(alltypes.opt_fixed32       == 3048);
+        TEST(alltypes.has_opt_sfixed32  == true);
+        TEST(alltypes.opt_sfixed32      == 3049);
+        TEST(alltypes.has_opt_float     == true);
+        TEST(alltypes.opt_float         == 3050.0f);
+        
+        TEST(alltypes.has_opt_fixed64   == true);
+        TEST(alltypes.opt_fixed64       == 3051);
+        TEST(alltypes.has_opt_sfixed64  == true);
+        TEST(alltypes.opt_sfixed64      == 3052);
+        TEST(alltypes.has_opt_double    == true);
+        TEST(alltypes.opt_double        == 3053.0);
+        
+        TEST(alltypes.has_opt_string    == true);
+        TEST(strcmp(alltypes.opt_string, "3054") == 0);
+        TEST(alltypes.has_opt_bytes     == true);
+        TEST(alltypes.opt_bytes.size == 4);
+        TEST(memcmp(alltypes.opt_bytes.bytes, "3055", 4) == 0);
+        TEST(alltypes.has_opt_submsg    == true);
+        TEST(strcmp(alltypes.opt_submsg.substuff1, "3056") == 0);
+        TEST(alltypes.opt_submsg.substuff2 == 3056);
+        TEST(alltypes.opt_submsg.substuff3 == 3);
+        TEST(alltypes.has_opt_enum      == true);
+        TEST(alltypes.opt_enum == MyEnum_Truth);
+    }
+    
     TEST(alltypes.end == 1099);
     
     return true;
 }
 
-int main()
+int main(int argc, char **argv)
 {
+    /* Whether to expect the optional values or the default values. */
+    int mode = (argc > 1) ? atoi(argv[1]) : 0;
+    
     /* Read the data into buffer */
-    uint8_t buffer[512];
+    uint8_t buffer[1024];
     size_t count = fread(buffer, 1, sizeof(buffer), stdin);
     
     /* Construct a pb_istream_t for reading from the buffer */
     pb_istream_t stream = pb_istream_from_buffer(buffer, count);
     
     /* Decode and print out the stuff */
-    if (!check_alltypes(&stream))
+    if (!check_alltypes(&stream, mode))
     {
-        printf("Parsing failed.\n");
+        printf("Parsing failed: %s\n", PB_GET_ERROR(&stream));
         return 1;
     } else {
         return 0;

tests/test_decode_callbacks.c

@@ -37,7 +37,7 @@ bool print_int32(pb_istream_t *stream, const pb_field_t *field, void *arg)
 bool print_fixed32(pb_istream_t *stream, const pb_field_t *field, void *arg)
 {
     uint32_t value;
-    if (!pb_dec_fixed32(stream, NULL, &value))
+    if (!pb_decode_fixed32(stream, &value))
         return false;
     
     printf((char*)arg, (long)value);
@@ -47,7 +47,7 @@ bool print_fixed32(pb_istream_t *stream, const pb_field_t *field, void *arg)
 bool print_fixed64(pb_istream_t *stream, const pb_field_t *field, void *arg)
 {
     uint64_t value;
-    if (!pb_dec_fixed64(stream, NULL, &value))
+    if (!pb_decode_fixed64(stream, &value))
         return false;
     
     printf((char*)arg, (long long)value);

tests/test_encode3.c

@@ -1,40 +1,117 @@
 /* Attempts to test all the datatypes supported by ProtoBuf.
- * Currently only tests the 'required' variety.
  */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <pb_encode.h>
 #include "alltypes.pb.h"
 
-int main()
+int main(int argc, char **argv)
 {
-    /* Initialize the structure with constants */
+    int mode = (argc > 1) ? atoi(argv[1]) : 0;
-    AllTypes alltypes = {
-        1001,
-        1002,
-        1003,
-        1004,
-        1005,
-        1006,
-        true,
-        
-        1008,
-        1009,
-        1010.0f,
-        
-        1011,
-        1012,
-        1013.0,
-        
-        "1014",
-        {4, "1015"},
-        {"1016", 1016},
-        MyEnum_Truth,
-        
-        1099
-    };
     
-    uint8_t buffer[512];
+    /* Initialize the structure with constants */
+    AllTypes alltypes = {0};
+    
+    alltypes.req_int32         = -1001;
+    alltypes.req_int64         = -1002;
+    alltypes.req_uint32        = 1003;
+    alltypes.req_uint64        = 1004;
+    alltypes.req_sint32        = -1005;
+    alltypes.req_sint64        = -1006;
+    alltypes.req_bool          = true;
+    
+    alltypes.req_fixed32       = 1008;
+    alltypes.req_sfixed32      = -1009;
+    alltypes.req_float         = 1010.0f;
+    
+    alltypes.req_fixed64       = 1011;
+    alltypes.req_sfixed64      = -1012;
+    alltypes.req_double        = 1013.0;
+    
+    strcpy(alltypes.req_string, "1014");
+    alltypes.req_bytes.size = 4;
+    memcpy(alltypes.req_bytes.bytes, "1015", 4);
+    strcpy(alltypes.req_submsg.substuff1, "1016");
+    alltypes.req_submsg.substuff2 = 1016;
+    alltypes.req_enum = MyEnum_Truth;
+    
+    alltypes.rep_int32_count = 5; alltypes.rep_int32[4] = -2001;
+    alltypes.rep_int64_count = 5; alltypes.rep_int64[4] = -2002;
+    alltypes.rep_uint32_count = 5; alltypes.rep_uint32[4] = 2003;
+    alltypes.rep_uint64_count = 5; alltypes.rep_uint64[4] = 2004;
+    alltypes.rep_sint32_count = 5; alltypes.rep_sint32[4] = -2005;
+    alltypes.rep_sint64_count = 5; alltypes.rep_sint64[4] = -2006;
+    alltypes.rep_bool_count = 5; alltypes.rep_bool[4] = true;
+    
+    alltypes.rep_fixed32_count = 5; alltypes.rep_fixed32[4] = 2008;
+    alltypes.rep_sfixed32_count = 5; alltypes.rep_sfixed32[4] = -2009;
+    alltypes.rep_float_count = 5; alltypes.rep_float[4] = 2010.0f;
+    
+    alltypes.rep_fixed64_count = 5; alltypes.rep_fixed64[4] = 2011;
+    alltypes.rep_sfixed64_count = 5; alltypes.rep_sfixed64[4] = -2012;
+    alltypes.rep_double_count = 5; alltypes.rep_double[4] = 2013.0;
+    
+    alltypes.rep_string_count = 5; strcpy(alltypes.rep_string[4], "2014");
+    alltypes.rep_bytes_count = 5; alltypes.rep_bytes[4].size = 4;
+    memcpy(alltypes.rep_bytes[4].bytes, "2015", 4);
+
+    alltypes.rep_submsg_count = 5;
+    strcpy(alltypes.rep_submsg[4].substuff1, "2016");
+    alltypes.rep_submsg[4].substuff2 = 2016;
+    alltypes.rep_submsg[4].has_substuff3 = true;
+    alltypes.rep_submsg[4].substuff3 = 2016;
+    
+    alltypes.rep_enum_count = 5; alltypes.rep_enum[4] = MyEnum_Truth;
+    
+    if (mode != 0)
+    {
+        /* Fill in values for optional fields */
+        alltypes.has_opt_int32 = true;
+        alltypes.opt_int32         = 3041;
+        alltypes.has_opt_int64 = true;
+        alltypes.opt_int64         = 3042;
+        alltypes.has_opt_uint32 = true;
+        alltypes.opt_uint32        = 3043;
+        alltypes.has_opt_uint64 = true;
+        alltypes.opt_uint64        = 3044;
+        alltypes.has_opt_sint32 = true;
+        alltypes.opt_sint32        = 3045;
+        alltypes.has_opt_sint64 = true;
+        alltypes.opt_sint64        = 3046;
+        alltypes.has_opt_bool = true;
+        alltypes.opt_bool          = true;
+        
+        alltypes.has_opt_fixed32 = true;
+        alltypes.opt_fixed32       = 3048;
+        alltypes.has_opt_sfixed32 = true;
+        alltypes.opt_sfixed32      = 3049;
+        alltypes.has_opt_float = true;
+        alltypes.opt_float         = 3050.0f;
+        
+        alltypes.has_opt_fixed64 = true;
+        alltypes.opt_fixed64       = 3051;
+        alltypes.has_opt_sfixed64 = true;
+        alltypes.opt_sfixed64      = 3052;
+        alltypes.has_opt_double = true;
+        alltypes.opt_double        = 3053.0;
+        
+        alltypes.has_opt_string = true;
+        strcpy(alltypes.opt_string, "3054");
+        alltypes.has_opt_bytes = true;
+        alltypes.opt_bytes.size = 4;
+        memcpy(alltypes.opt_bytes.bytes, "3055", 4);
+        alltypes.has_opt_submsg = true;
+        strcpy(alltypes.opt_submsg.substuff1, "3056");
+        alltypes.opt_submsg.substuff2 = 3056;
+        alltypes.has_opt_enum = true;
+        alltypes.opt_enum = MyEnum_Truth;
+    }
+    
+    alltypes.end = 1099;
+    
+    uint8_t buffer[1024];
     pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
     
     /* Now encode it and check if we succeeded. */
@@ -45,6 +122,7 @@ int main()
     }
     else
     {
+        fprintf(stderr, "Encoding failed!\n");
         return 1; /* Failure */
     }
 }

tests/test_missing_fields.c

@@ -0,0 +1,49 @@
+/* Checks that missing required fields are detected properly */
+
+#include <stdio.h>
+#include <pb_encode.h>
+#include <pb_decode.h>
+#include "missing_fields.pb.h"
+
+int main()
+{
+    uint8_t buffer[512] = {};
+    
+    /* Create a message with one missing field */
+    {
+        MissingField msg = {};
+        pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
+        if (!pb_encode(&stream, MissingField_fields, &msg))
+        {
+            printf("Encode failed.\n");
+            return 1;
+        }
+    }
+
+    /* Test that it decodes properly if we don't require that field */
+    {
+        MissingField msg = {};
+        pb_istream_t stream = pb_istream_from_buffer(buffer, sizeof(buffer));
+        
+        if (!pb_decode(&stream, MissingField_fields, &msg))
+        {
+            printf("Decode failed: %s\n", PB_GET_ERROR(&stream));
+            return 2;
+        }
+    }
+    
+    /* Test that it does *not* decode properly if we require the field */
+    {
+        AllFields msg = {};
+        pb_istream_t stream = pb_istream_from_buffer(buffer, sizeof(buffer));
+        
+        if (pb_decode(&stream, AllFields_fields, &msg))
+        {
+            printf("Decode didn't detect missing field.\n");
+            return 3;
+        }
+    }
+    
+    return 0; /* All ok */
+}
+

tests/test_multiple_files.c

@@ -0,0 +1,13 @@
+/*
+ * Tests if still compile if typedefs are redfefined in STATIC_ASSERTS when
+ * proto file includes another poto file
+ */
+
+#include <stdio.h>
+#include <pb_encode.h>
+#include "callbacks2.pb.h"
+
+int main()
+{
+	return 0;
+}

tools/set_version.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# Run this from the top directory of nanopb tree.
+# e.g. user@localhost:~/nanopb$ tools/set_version.sh nanopb-0.1.9-dev
+# It sets the version number in pb.h and generator/nanopb_generator.py.
+
+sed -i -e 's/nanopb_version\s*=\s*"[^"]*"/nanopb_version = "'$1'"/' generator/nanopb_generator.py
+sed -i -e 's/#define\s*NANOPB_VERSION\s*.*/#define NANOPB_VERSION '$1'/' pb.h
+
+