More unittests

git-svn-id: https://svn.kapsi.fi/jpa/nanopb@966 e3a754e5-d11d-0410-8d38-ebb782a927b9

docs/reference.rst

@@ -37,6 +37,7 @@ PB_HTYPE_REQUIRED    0x00  Verify that field exists in decoded message.
 PB_HTYPE_OPTIONAL    0x10  Use separate *has_<field>* boolean to specify
                            whether the field is present.
 PB_HTYPE_ARRAY       0x20  A repeated field with preallocated array.
+                           Separate *<field>_count* for number of items.
 PB_HTYPE_CALLBACK    0x30  A field with dynamic storage size, data is
                            actually a pointer to a structure containing a
                            callback function.
@@ -183,6 +184,17 @@ Same as `pb_encode_tag`_, except takes the parameters from a *pb_field_t* struct
 
 This function only considers the LTYPE of the field. You can use it from your field callbacks, because the source generator writes correct LTYPE also for callback type fields.
 
+Wire type mapping is as follows:
+
+========================= ============
+LTYPEs                    Wire type
+========================= ============
+VARINT, SVARINT           PB_WT_VARINT
+FIXED with data_size == 8 PB_WT_64BIT  
+STRING, BYTES, SUBMESSAGE PB_WT_STRING 
+FIXED with data_size == 4 PB_WT_32BIT
+========================= ============
+
 pb_encode_string
 ----------------
 Writes the length of a string as varint and then contents of the string. Used for writing fields with wire type PB_WT_STRING. ::