diff options
Diffstat (limited to 'pb_encode.c')
| -rw-r--r-- | pb_encode.c | 436 |
1 files changed, 319 insertions, 117 deletions
diff --git a/pb_encode.c b/pb_encode.c index dc5a273..089172c 100644 --- a/pb_encode.c +++ b/pb_encode.c @@ -5,6 +5,7 @@ #include "pb.h" #include "pb_encode.h" +#include "pb_common.h" /* Use the GCC warn_unused_result attribute to check that all return values * are propagated correctly. On other compilers and gcc before 3.4.0 just @@ -21,11 +22,12 @@ **************************************/ typedef bool (*pb_encoder_t)(pb_ostream_t *stream, const pb_field_t *field, const void *src) checkreturn; -static bool checkreturn buf_write(pb_ostream_t *stream, const uint8_t *buf, size_t count); +static bool checkreturn buf_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count); static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *field, const void *pData, size_t count, pb_encoder_t func); static bool checkreturn encode_field(pb_ostream_t *stream, const pb_field_t *field, const void *pData); static bool checkreturn default_extension_encoder(pb_ostream_t *stream, const pb_extension_t *extension); static bool checkreturn encode_extension_field(pb_ostream_t *stream, const pb_field_t *field, const void *pData); +static void *pb_const_cast(const void *p); static bool checkreturn pb_enc_varint(pb_ostream_t *stream, const pb_field_t *field, const void *src); static bool checkreturn pb_enc_uvarint(pb_ostream_t *stream, const pb_field_t *field, const void *src); static bool checkreturn pb_enc_svarint(pb_ostream_t *stream, const pb_field_t *field, const void *src); @@ -34,6 +36,17 @@ static bool checkreturn pb_enc_fixed64(pb_ostream_t *stream, const pb_field_t *f static bool checkreturn pb_enc_bytes(pb_ostream_t *stream, const pb_field_t *field, const void *src); static bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_t *field, const void *src); static bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_t *field, const void *src); +static bool checkreturn pb_enc_fixed_length_bytes(pb_ostream_t *stream, const pb_field_t *field, const void *src); + +#ifdef PB_WITHOUT_64BIT +#define pb_int64_t int32_t +#define pb_uint64_t uint32_t + +static bool checkreturn pb_encode_negative_varint(pb_ostream_t *stream, pb_uint64_t value); +#else +#define pb_int64_t int64_t +#define pb_uint64_t uint64_t +#endif /* --- Function pointers to field encoders --- * Order in the array must match pb_action_t LTYPE numbering. @@ -48,25 +61,27 @@ static const pb_encoder_t PB_ENCODERS[PB_LTYPES_COUNT] = { &pb_enc_bytes, &pb_enc_string, &pb_enc_submessage, - NULL /* extensions */ + NULL, /* extensions */ + &pb_enc_fixed_length_bytes }; /******************************* * pb_ostream_t implementation * *******************************/ -static bool checkreturn buf_write(pb_ostream_t *stream, const uint8_t *buf, size_t count) +static bool checkreturn buf_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count) { - uint8_t *dest = (uint8_t*)stream->state; + size_t i; + pb_byte_t *dest = (pb_byte_t*)stream->state; stream->state = dest + count; - while (count--) - *dest++ = *buf++; + for (i = 0; i < count; i++) + dest[i] = buf[i]; return true; } -pb_ostream_t pb_ostream_from_buffer(uint8_t *buf, size_t bufsize) +pb_ostream_t pb_ostream_from_buffer(pb_byte_t *buf, size_t bufsize) { pb_ostream_t stream; #ifdef PB_BUFFER_ONLY @@ -83,7 +98,7 @@ pb_ostream_t pb_ostream_from_buffer(uint8_t *buf, size_t bufsize) return stream; } -bool checkreturn pb_write(pb_ostream_t *stream, const uint8_t *buf, size_t count) +bool checkreturn pb_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count) { if (stream->callback != NULL) { @@ -149,7 +164,7 @@ static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *fie size = sizestream.bytes_written; } - if (!pb_encode_varint(stream, (uint64_t)size)) + if (!pb_encode_varint(stream, (pb_uint64_t)size)) return false; if (stream->callback == NULL) @@ -181,7 +196,7 @@ static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *fie PB_LTYPE(field->type) == PB_LTYPE_BYTES)) { if (!func(stream, field, *(const void* const*)p)) - return false; + return false; } else { @@ -195,21 +210,124 @@ static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *fie return true; } +/* In proto3, all fields are optional and are only encoded if their value is "non-zero". + * This function implements the check for the zero value. */ +static bool pb_check_proto3_default_value(const pb_field_t *field, const void *pData) +{ + pb_type_t type = field->type; + const void *pSize = (const char*)pData + field->size_offset; + + if (PB_HTYPE(type) == PB_HTYPE_REQUIRED) + { + /* Required proto2 fields inside proto3 submessage, pretty rare case */ + return false; + } + else if (PB_HTYPE(type) == PB_HTYPE_REPEATED) + { + /* Repeated fields inside proto3 submessage: present if count != 0 */ + return *(const pb_size_t*)pSize == 0; + } + else if (PB_HTYPE(type) == PB_HTYPE_ONEOF) + { + /* Oneof fields */ + return *(const pb_size_t*)pSize == 0; + } + else if (PB_HTYPE(type) == PB_HTYPE_OPTIONAL && field->size_offset) + { + /* Proto2 optional fields inside proto3 submessage */ + return *(const bool*)pSize == false; + } + + /* Rest is proto3 singular fields */ + + if (PB_ATYPE(type) == PB_ATYPE_STATIC) + { + if (PB_LTYPE(type) == PB_LTYPE_BYTES) + { + const pb_bytes_array_t *bytes = (const pb_bytes_array_t*)pData; + return bytes->size == 0; + } + else if (PB_LTYPE(type) == PB_LTYPE_STRING) + { + return *(const char*)pData == '\0'; + } + else if (PB_LTYPE(type) == PB_LTYPE_FIXED_LENGTH_BYTES) + { + /* Fixed length bytes is only empty if its length is fixed + * as 0. Which would be pretty strange, but we can check + * it anyway. */ + return field->data_size == 0; + } + else if (PB_LTYPE(type) == PB_LTYPE_SUBMESSAGE) + { + /* Check all fields in the submessage to find if any of them + * are non-zero. The comparison cannot be done byte-per-byte + * because the C struct may contain padding bytes that must + * be skipped. + */ + pb_field_iter_t iter; + if (pb_field_iter_begin(&iter, (const pb_field_t*)field->ptr, pb_const_cast(pData))) + { + do + { + if (!pb_check_proto3_default_value(iter.pos, iter.pData)) + { + return false; + } + } while (pb_field_iter_next(&iter)); + } + return true; + } + } + + { + /* Catch-all branch that does byte-per-byte comparison for zero value. + * + * This is for all pointer fields, and for static PB_LTYPE_VARINT, + * UVARINT, SVARINT, FIXED32, FIXED64, EXTENSION fields, and also + * callback fields. These all have integer or pointer value which + * can be compared with 0. + */ + pb_size_t i; + const char *p = (const char*)pData; + for (i = 0; i < field->data_size; i++) + { + if (p[i] != 0) + { + return false; + } + } + + return true; + } +} + /* Encode a field with static or pointer allocation, i.e. one whose data * is available to the encoder directly. */ static bool checkreturn encode_basic_field(pb_ostream_t *stream, const pb_field_t *field, const void *pData) { pb_encoder_t func; - const void *pSize; - bool implicit_has = true; + bool implicit_has; + const void *pSize = &implicit_has; func = PB_ENCODERS[PB_LTYPE(field->type)]; if (field->size_offset) + { + /* Static optional, repeated or oneof field */ pSize = (const char*)pData + field->size_offset; + } + else if (PB_HTYPE(field->type) == PB_HTYPE_OPTIONAL) + { + /* Proto3 style field, optional but without explicit has_ field. */ + implicit_has = !pb_check_proto3_default_value(field, pData); + } else - pSize = &implicit_has; + { + /* Required field, always present */ + implicit_has = true; + } if (PB_ATYPE(field->type) == PB_ATYPE_POINTER) { @@ -217,7 +335,6 @@ static bool checkreturn encode_basic_field(pb_ostream_t *stream, * the data. If the 2nd pointer is NULL, it is interpreted as if * the has_field was false. */ - pData = *(const void* const*)pData; implicit_has = (pData != NULL); } @@ -244,11 +361,29 @@ static bool checkreturn encode_basic_field(pb_ostream_t *stream, } break; - case PB_HTYPE_REPEATED: - if (!encode_array(stream, field, pData, *(const size_t*)pSize, func)) + case PB_HTYPE_REPEATED: { + pb_size_t count; + if (field->size_offset != 0) { + count = *(const pb_size_t*)pSize; + } else { + count = field->array_size; + } + if (!encode_array(stream, field, pData, count, func)) return false; break; + } + case PB_HTYPE_ONEOF: + if (*(const pb_size_t*)pSize == field->tag) + { + if (!pb_encode_tag_for_field(stream, field)) + return false; + + if (!func(stream, field, pData)) + return false; + } + break; + default: PB_RETURN_ERROR(stream, "invalid field type"); } @@ -301,7 +436,18 @@ static bool checkreturn default_extension_encoder(pb_ostream_t *stream, const pb_extension_t *extension) { const pb_field_t *field = (const pb_field_t*)extension->type->arg; - return encode_field(stream, field, extension->dest); + + if (PB_ATYPE(field->type) == PB_ATYPE_POINTER) + { + /* For pointer extensions, the pointer is stored directly + * in the extension structure. This avoids having an extra + * indirection. */ + return encode_field(stream, field, &extension->dest); + } + else + { + return encode_field(stream, field, extension->dest); + } } /* Walk through all the registered extensions and give them a chance @@ -310,7 +456,7 @@ static bool checkreturn encode_extension_field(pb_ostream_t *stream, const pb_field_t *field, const void *pData) { const pb_extension_t *extension = *(const pb_extension_t* const *)pData; - UNUSED(field); + PB_UNUSED(field); while (extension) { @@ -333,42 +479,38 @@ static bool checkreturn encode_extension_field(pb_ostream_t *stream, * Encode all fields * *********************/ +static void *pb_const_cast(const void *p) +{ + /* Note: this casts away const, in order to use the common field iterator + * logic for both encoding and decoding. */ + union { + void *p1; + const void *p2; + } t; + t.p2 = p; + return t.p1; +} + 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; - size_t prev_size = 0; + pb_field_iter_t iter; + if (!pb_field_iter_begin(&iter, fields, pb_const_cast(src_struct))) + return true; /* Empty message type */ - while (field->tag != 0) - { - pData = (const char*)pData + prev_size + field->data_offset; - if (PB_ATYPE(field->type) == PB_ATYPE_POINTER) - prev_size = sizeof(const void*); - else - prev_size = field->data_size; - - /* Special case for static arrays */ - if (PB_ATYPE(field->type) == PB_ATYPE_STATIC && - PB_HTYPE(field->type) == PB_HTYPE_REPEATED) - { - prev_size *= field->array_size; - } - - if (PB_LTYPE(field->type) == PB_LTYPE_EXTENSION) + do { + if (PB_LTYPE(iter.pos->type) == PB_LTYPE_EXTENSION) { /* Special case for the extension field placeholder */ - if (!encode_extension_field(stream, field, pData)) + if (!encode_extension_field(stream, iter.pos, iter.pData)) return false; } else { /* Regular field */ - if (!encode_field(stream, field, pData)) + if (!encode_field(stream, iter.pos, iter.pData)) return false; } - - field++; - } + } while (pb_field_iter_next(&iter)); return true; } @@ -378,6 +520,16 @@ bool pb_encode_delimited(pb_ostream_t *stream, const pb_field_t fields[], const return pb_encode_submessage(stream, fields, src_struct); } +bool pb_encode_nullterminated(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct) +{ + const pb_byte_t zero = 0; + + if (!pb_encode(stream, fields, src_struct)) + return false; + + return pb_write(stream, &zero, 1); +} + bool pb_get_encoded_size(size_t *size, const pb_field_t fields[], const void *src_struct) { pb_ostream_t stream = PB_OSTREAM_SIZING; @@ -392,17 +544,47 @@ bool pb_get_encoded_size(size_t *size, const pb_field_t fields[], const void *sr /******************** * Helper functions * ********************/ -bool checkreturn pb_encode_varint(pb_ostream_t *stream, uint64_t value) + +#ifdef PB_WITHOUT_64BIT +bool checkreturn pb_encode_negative_varint(pb_ostream_t *stream, pb_uint64_t value) +{ + pb_byte_t buffer[10]; + size_t i = 0; + size_t compensation = 32;/* we need to compensate 32 bits all set to 1 */ + + while (value) + { + buffer[i] = (pb_byte_t)((value & 0x7F) | 0x80); + value >>= 7; + if (compensation) + { + /* re-set all the compensation bits we can or need */ + size_t bits = compensation > 7 ? 7 : compensation; + value ^= (pb_uint64_t)((0xFFu >> (8 - bits)) << 25); /* set the number of bits needed on the lowest of the most significant 7 bits */ + compensation -= bits; + } + i++; + } + buffer[i - 1] &= 0x7F; /* Unset top bit on last byte */ + + return pb_write(stream, buffer, i); +} +#endif + +bool checkreturn pb_encode_varint(pb_ostream_t *stream, pb_uint64_t value) { - uint8_t buffer[10]; + pb_byte_t buffer[10]; size_t i = 0; - if (value == 0) - return pb_write(stream, (uint8_t*)&value, 1); + if (value <= 0x7F) + { + pb_byte_t v = (pb_byte_t)value; + return pb_write(stream, &v, 1); + } while (value) { - buffer[i] = (uint8_t)((value & 0x7F) | 0x80); + buffer[i] = (pb_byte_t)((value & 0x7F) | 0x80); value >>= 7; i++; } @@ -411,54 +593,48 @@ bool checkreturn pb_encode_varint(pb_ostream_t *stream, uint64_t value) return pb_write(stream, buffer, i); } -bool checkreturn pb_encode_svarint(pb_ostream_t *stream, int64_t value) +bool checkreturn pb_encode_svarint(pb_ostream_t *stream, pb_int64_t value) { - uint64_t zigzagged; + pb_uint64_t zigzagged; if (value < 0) - zigzagged = ~((uint64_t)value << 1); + zigzagged = ~((pb_uint64_t)value << 1); else - zigzagged = (uint64_t)value << 1; + zigzagged = (pb_uint64_t)value << 1; return pb_encode_varint(stream, zigzagged); } bool checkreturn pb_encode_fixed32(pb_ostream_t *stream, const void *value) { - #ifdef __BIG_ENDIAN__ - const uint8_t *bytes = value; - 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, (const uint8_t*)value, 4); - #endif + uint32_t val = *(const uint32_t*)value; + pb_byte_t bytes[4]; + bytes[0] = (pb_byte_t)(val & 0xFF); + bytes[1] = (pb_byte_t)((val >> 8) & 0xFF); + bytes[2] = (pb_byte_t)((val >> 16) & 0xFF); + bytes[3] = (pb_byte_t)((val >> 24) & 0xFF); + return pb_write(stream, bytes, 4); } +#ifndef PB_WITHOUT_64BIT bool checkreturn pb_encode_fixed64(pb_ostream_t *stream, const void *value) { - #ifdef __BIG_ENDIAN__ - const uint8_t *bytes = value; - uint8_t lebytes[8]; - 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, (const uint8_t*)value, 8); - #endif + uint64_t val = *(const uint64_t*)value; + pb_byte_t bytes[8]; + bytes[0] = (pb_byte_t)(val & 0xFF); + bytes[1] = (pb_byte_t)((val >> 8) & 0xFF); + bytes[2] = (pb_byte_t)((val >> 16) & 0xFF); + bytes[3] = (pb_byte_t)((val >> 24) & 0xFF); + bytes[4] = (pb_byte_t)((val >> 32) & 0xFF); + bytes[5] = (pb_byte_t)((val >> 40) & 0xFF); + bytes[6] = (pb_byte_t)((val >> 48) & 0xFF); + bytes[7] = (pb_byte_t)((val >> 56) & 0xFF); + return pb_write(stream, bytes, 8); } +#endif bool checkreturn pb_encode_tag(pb_ostream_t *stream, pb_wire_type_t wiretype, uint32_t field_number) { - uint64_t tag = ((uint64_t)field_number << 3) | wiretype; + pb_uint64_t tag = ((pb_uint64_t)field_number << 3) | wiretype; return pb_encode_varint(stream, tag); } @@ -484,6 +660,7 @@ bool checkreturn pb_encode_tag_for_field(pb_ostream_t *stream, const pb_field_t case PB_LTYPE_BYTES: case PB_LTYPE_STRING: case PB_LTYPE_SUBMESSAGE: + case PB_LTYPE_FIXED_LENGTH_BYTES: wiretype = PB_WT_STRING; break; @@ -494,9 +671,9 @@ bool checkreturn pb_encode_tag_for_field(pb_ostream_t *stream, const pb_field_t return pb_encode_tag(stream, wiretype, field->tag); } -bool checkreturn pb_encode_string(pb_ostream_t *stream, const uint8_t *buffer, size_t size) +bool checkreturn pb_encode_string(pb_ostream_t *stream, const pb_byte_t *buffer, size_t size) { - if (!pb_encode_varint(stream, (uint64_t)size)) + if (!pb_encode_varint(stream, (pb_uint64_t)size)) return false; return pb_write(stream, buffer, size); @@ -519,7 +696,7 @@ bool checkreturn pb_encode_submessage(pb_ostream_t *stream, const pb_field_t fie size = substream.bytes_written; - if (!pb_encode_varint(stream, (uint64_t)size)) + if (!pb_encode_varint(stream, (pb_uint64_t)size)) return false; if (stream->callback == NULL) @@ -556,69 +733,89 @@ bool checkreturn pb_encode_submessage(pb_ostream_t *stream, const pb_field_t fie static bool checkreturn pb_enc_varint(pb_ostream_t *stream, const pb_field_t *field, const void *src) { - int64_t value = 0; - - /* Cases 1 and 2 are for compilers that have smaller types for bool - * or enums. */ - switch (field->data_size) - { - case 1: value = *(const int8_t*)src; break; - case 2: value = *(const int16_t*)src; break; - case 4: value = *(const int32_t*)src; break; - case 8: value = *(const int64_t*)src; break; - default: PB_RETURN_ERROR(stream, "invalid data_size"); - } + pb_int64_t value = 0; + + if (field->data_size == sizeof(int_least8_t)) + value = *(const int_least8_t*)src; + else if (field->data_size == sizeof(int_least16_t)) + value = *(const int_least16_t*)src; + else if (field->data_size == sizeof(int32_t)) + value = *(const int32_t*)src; + else if (field->data_size == sizeof(pb_int64_t)) + value = *(const pb_int64_t*)src; + else + PB_RETURN_ERROR(stream, "invalid data_size"); - return pb_encode_varint(stream, (uint64_t)value); +#ifdef PB_WITHOUT_64BIT + if (value < 0) + return pb_encode_negative_varint(stream, (pb_uint64_t)value); + else +#endif + return pb_encode_varint(stream, (pb_uint64_t)value); } static bool checkreturn pb_enc_uvarint(pb_ostream_t *stream, const pb_field_t *field, const void *src) { - uint64_t value = 0; - - switch (field->data_size) - { - case 4: value = *(const uint32_t*)src; break; - case 8: value = *(const uint64_t*)src; break; - default: PB_RETURN_ERROR(stream, "invalid data_size"); - } + pb_uint64_t value = 0; + + if (field->data_size == sizeof(uint_least8_t)) + value = *(const uint_least8_t*)src; + else if (field->data_size == sizeof(uint_least16_t)) + value = *(const uint_least16_t*)src; + else if (field->data_size == sizeof(uint32_t)) + value = *(const uint32_t*)src; + else if (field->data_size == sizeof(pb_uint64_t)) + value = *(const pb_uint64_t*)src; + else + PB_RETURN_ERROR(stream, "invalid data_size"); return pb_encode_varint(stream, value); } static bool checkreturn pb_enc_svarint(pb_ostream_t *stream, const pb_field_t *field, const void *src) { - int64_t value = 0; - - switch (field->data_size) - { - case 4: value = *(const int32_t*)src; break; - case 8: value = *(const int64_t*)src; break; - default: PB_RETURN_ERROR(stream, "invalid data_size"); - } + pb_int64_t value = 0; + + if (field->data_size == sizeof(int_least8_t)) + value = *(const int_least8_t*)src; + else if (field->data_size == sizeof(int_least16_t)) + value = *(const int_least16_t*)src; + else if (field->data_size == sizeof(int32_t)) + value = *(const int32_t*)src; + else if (field->data_size == sizeof(pb_int64_t)) + value = *(const pb_int64_t*)src; + else + PB_RETURN_ERROR(stream, "invalid data_size"); return pb_encode_svarint(stream, value); } static bool checkreturn pb_enc_fixed64(pb_ostream_t *stream, const pb_field_t *field, const void *src) { - UNUSED(field); + PB_UNUSED(field); +#ifndef PB_WITHOUT_64BIT return pb_encode_fixed64(stream, src); +#else + PB_UNUSED(src); + PB_RETURN_ERROR(stream, "no 64bit support"); +#endif } static bool checkreturn pb_enc_fixed32(pb_ostream_t *stream, const pb_field_t *field, const void *src) { - UNUSED(field); + PB_UNUSED(field); return pb_encode_fixed32(stream, src); } static bool checkreturn pb_enc_bytes(pb_ostream_t *stream, const pb_field_t *field, const void *src) { - const pb_bytes_array_t *bytes = (const pb_bytes_array_t*)src; + const pb_bytes_array_t *bytes = NULL; + + bytes = (const pb_bytes_array_t*)src; if (src == NULL) { - /* Threat null pointer as an empty bytes field */ + /* Treat null pointer as an empty bytes field */ return pb_encode_string(stream, NULL, 0); } @@ -633,7 +830,6 @@ static bool checkreturn pb_enc_bytes(pb_ostream_t *stream, const pb_field_t *fie static bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_t *field, const void *src) { - /* strnlen() is not always available, so just use a loop */ size_t size = 0; size_t max_size = field->data_size; const char *p = (const char*)src; @@ -643,10 +839,11 @@ static bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_t *fi if (src == NULL) { - size = 0; /* Threat null pointer as an empty string */ + size = 0; /* Treat null pointer as an empty string */ } else { + /* strnlen() is not always available, so just use a loop */ while (size < max_size && *p != '\0') { size++; @@ -654,7 +851,7 @@ static bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_t *fi } } - return pb_encode_string(stream, (const uint8_t*)src, size); + return pb_encode_string(stream, (const pb_byte_t*)src, size); } static bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_t *field, const void *src) @@ -665,3 +862,8 @@ static bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_t return pb_encode_submessage(stream, (const pb_field_t*)field->ptr, src); } +static bool checkreturn pb_enc_fixed_length_bytes(pb_ostream_t *stream, const pb_field_t *field, const void *src) +{ + return pb_encode_string(stream, (const pb_byte_t*)src, field->data_size); +} + |