Fixed a bug related to submessage encoding into memory buffer.

Stream state was not copied back from substream in pb_enc_submessage,
which caused garbage output if the stream callback modified the state.

Expanded tests to cover this problem.

Thanks to Paweł Pery for debugging and reporting this problem.


git-svn-id: https://svn.kapsi.fi/jpa/nanopb@1089 e3a754e5-d11d-0410-8d38-ebb782a927b9

tests/test_encode2.c

@@ -0,0 +1,32 @@
+/* Same as test_encode1.c, except writes directly to stdout.
+ */
+
+#include <stdio.h>
+#include <pb_encode.h>
+#include "person.pb.h"
+
+/* This binds the pb_ostream_t into the stdout stream */
+bool streamcallback(pb_ostream_t *stream, const uint8_t *buf, size_t count)
+{
+    FILE *file = (FILE*) stream->state;
+    return fwrite(buf, 1, count, file) == count;
+}
+
+int main()
+{
+    /* Initialize the structure with constants */
+    Person person = {"Test Person 99", 99, true, "test@person.com",
+        3, {{"555-12345678", true, Person_PhoneType_MOBILE},
+            {"99-2342", false, 0},
+            {"1234-5678", true, Person_PhoneType_WORK},
+        }};
+    
+    /* Prepare the stream, output goes directly to stdout */
+    pb_ostream_t stream = {&streamcallback, stdout, SIZE_MAX, 0};
+    
+    /* Now encode it and check if we succeeded. */
+    if (pb_encode(&stream, Person_fields, &person))
+        return 0; /* Success */
+    else
+        return 1; /* Failure */
+}