Ollie Matthews / Nanopb

Nanopb files

Dependents:   nanopb_V2 Message_generator LEX_Threaded_Programming_V3

pb_decode.c@0:c7beea49fc91, 2013-02-19 (annotated)

Committer:
intrinseca
Date:
Tue Feb 19 20:03:29 2013 +0000
Revision:
0:c7beea49fc91
Child:
2:d2c61a9be078
Initial Uploaded Version 0.1.9

Who changed what in which revision?

UserRevisionLine numberNew contents of line
intrinseca 0:c7beea49fc91 1 /* pb_decode.c -- decode a protobuf using minimal resources
intrinseca 0:c7beea49fc91 2 *
intrinseca 0:c7beea49fc91 3 * 2011 Petteri Aimonen <jpa@kapsi.fi>
intrinseca 0:c7beea49fc91 4 */
intrinseca 0:c7beea49fc91 5
intrinseca 0:c7beea49fc91 6 /* The warn_unused_result attribute appeared first in gcc-3.4.0 */
intrinseca 0:c7beea49fc91 7 #if !defined(__GNUC__) || ( __GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
intrinseca 0:c7beea49fc91 8 #define checkreturn
intrinseca 0:c7beea49fc91 9 #else
intrinseca 0:c7beea49fc91 10 /* Verify that we remember to check all return values for proper error propagation */
intrinseca 0:c7beea49fc91 11 #define checkreturn __attribute__((warn_unused_result))
intrinseca 0:c7beea49fc91 12 #endif
intrinseca 0:c7beea49fc91 13
intrinseca 0:c7beea49fc91 14 #define NANOPB_INTERNALS
intrinseca 0:c7beea49fc91 15 #include "pb.h"
intrinseca 0:c7beea49fc91 16 #include "pb_decode.h"
intrinseca 0:c7beea49fc91 17 #include <string.h>
intrinseca 0:c7beea49fc91 18
intrinseca 0:c7beea49fc91 19 typedef bool (*pb_decoder_t)(pb_istream_t *stream, const pb_field_t *field, void *dest) checkreturn;
intrinseca 0:c7beea49fc91 20
intrinseca 0:c7beea49fc91 21 /* --- Function pointers to field decoders ---
intrinseca 0:c7beea49fc91 22 * Order in the array must match pb_action_t LTYPE numbering.
intrinseca 0:c7beea49fc91 23 */
intrinseca 0:c7beea49fc91 24 static const pb_decoder_t PB_DECODERS[PB_LTYPES_COUNT] = {
intrinseca 0:c7beea49fc91 25 &pb_dec_varint,
intrinseca 0:c7beea49fc91 26 &pb_dec_svarint,
intrinseca 0:c7beea49fc91 27 &pb_dec_fixed32,
intrinseca 0:c7beea49fc91 28 &pb_dec_fixed64,
intrinseca 0:c7beea49fc91 29
intrinseca 0:c7beea49fc91 30 &pb_dec_bytes,
intrinseca 0:c7beea49fc91 31 &pb_dec_string,
intrinseca 0:c7beea49fc91 32 &pb_dec_submessage
intrinseca 0:c7beea49fc91 33 };
intrinseca 0:c7beea49fc91 34
intrinseca 0:c7beea49fc91 35 /**************
intrinseca 0:c7beea49fc91 36 * pb_istream *
intrinseca 0:c7beea49fc91 37 **************/
intrinseca 0:c7beea49fc91 38
intrinseca 0:c7beea49fc91 39 static bool checkreturn buf_read(pb_istream_t *stream, uint8_t *buf, size_t count)
intrinseca 0:c7beea49fc91 40 {
intrinseca 0:c7beea49fc91 41 uint8_t *source = (uint8_t*)stream->state;
intrinseca 0:c7beea49fc91 42 stream->state = source + count;
intrinseca 0:c7beea49fc91 43
intrinseca 0:c7beea49fc91 44 if (buf != NULL)
intrinseca 0:c7beea49fc91 45 {
intrinseca 0:c7beea49fc91 46 while (count--)
intrinseca 0:c7beea49fc91 47 *buf++ = *source++;
intrinseca 0:c7beea49fc91 48 }
intrinseca 0:c7beea49fc91 49
intrinseca 0:c7beea49fc91 50 return true;
intrinseca 0:c7beea49fc91 51 }
intrinseca 0:c7beea49fc91 52
intrinseca 0:c7beea49fc91 53 bool checkreturn pb_read(pb_istream_t *stream, uint8_t *buf, size_t count)
intrinseca 0:c7beea49fc91 54 {
intrinseca 0:c7beea49fc91 55 #ifndef PB_BUFFER_ONLY
intrinseca 0:c7beea49fc91 56 if (buf == NULL && stream->callback != buf_read)
intrinseca 0:c7beea49fc91 57 {
intrinseca 0:c7beea49fc91 58 /* Skip input bytes */
intrinseca 0:c7beea49fc91 59 uint8_t tmp[16];
intrinseca 0:c7beea49fc91 60 while (count > 16)
intrinseca 0:c7beea49fc91 61 {
intrinseca 0:c7beea49fc91 62 if (!pb_read(stream, tmp, 16))
intrinseca 0:c7beea49fc91 63 return false;
intrinseca 0:c7beea49fc91 64
intrinseca 0:c7beea49fc91 65 count -= 16;
intrinseca 0:c7beea49fc91 66 }
intrinseca 0:c7beea49fc91 67
intrinseca 0:c7beea49fc91 68 return pb_read(stream, tmp, count);
intrinseca 0:c7beea49fc91 69 }
intrinseca 0:c7beea49fc91 70 #endif
intrinseca 0:c7beea49fc91 71
intrinseca 0:c7beea49fc91 72 if (stream->bytes_left < count)
intrinseca 0:c7beea49fc91 73 PB_RETURN_ERROR(stream, "end-of-stream");
intrinseca 0:c7beea49fc91 74
intrinseca 0:c7beea49fc91 75 #ifndef PB_BUFFER_ONLY
intrinseca 0:c7beea49fc91 76 if (!stream->callback(stream, buf, count))
intrinseca 0:c7beea49fc91 77 PB_RETURN_ERROR(stream, "io error");
intrinseca 0:c7beea49fc91 78 #else
intrinseca 0:c7beea49fc91 79 if (!buf_read(stream, buf, count))
intrinseca 0:c7beea49fc91 80 return false;
intrinseca 0:c7beea49fc91 81 #endif
intrinseca 0:c7beea49fc91 82
intrinseca 0:c7beea49fc91 83 stream->bytes_left -= count;
intrinseca 0:c7beea49fc91 84 return true;
intrinseca 0:c7beea49fc91 85 }
intrinseca 0:c7beea49fc91 86
intrinseca 0:c7beea49fc91 87 pb_istream_t pb_istream_from_buffer(uint8_t *buf, size_t bufsize)
intrinseca 0:c7beea49fc91 88 {
intrinseca 0:c7beea49fc91 89 pb_istream_t stream;
intrinseca 0:c7beea49fc91 90 #ifdef PB_BUFFER_ONLY
intrinseca 0:c7beea49fc91 91 stream.callback = NULL;
intrinseca 0:c7beea49fc91 92 #else
intrinseca 0:c7beea49fc91 93 stream.callback = &buf_read;
intrinseca 0:c7beea49fc91 94 #endif
intrinseca 0:c7beea49fc91 95 stream.state = buf;
intrinseca 0:c7beea49fc91 96 stream.bytes_left = bufsize;
intrinseca 0:c7beea49fc91 97 #ifndef PB_NO_ERRMSG
intrinseca 0:c7beea49fc91 98 stream.errmsg = NULL;
intrinseca 0:c7beea49fc91 99 #endif
intrinseca 0:c7beea49fc91 100 return stream;
intrinseca 0:c7beea49fc91 101 }
intrinseca 0:c7beea49fc91 102
intrinseca 0:c7beea49fc91 103 /********************
intrinseca 0:c7beea49fc91 104 * Helper functions *
intrinseca 0:c7beea49fc91 105 ********************/
intrinseca 0:c7beea49fc91 106
intrinseca 0:c7beea49fc91 107 static bool checkreturn pb_decode_varint32(pb_istream_t *stream, uint32_t *dest)
intrinseca 0:c7beea49fc91 108 {
intrinseca 0:c7beea49fc91 109 uint8_t byte;
intrinseca 0:c7beea49fc91 110 uint32_t result;
intrinseca 0:c7beea49fc91 111
intrinseca 0:c7beea49fc91 112 if (!pb_read(stream, &byte, 1))
intrinseca 0:c7beea49fc91 113 return false;
intrinseca 0:c7beea49fc91 114
intrinseca 0:c7beea49fc91 115 if (!(byte & 0x80))
intrinseca 0:c7beea49fc91 116 {
intrinseca 0:c7beea49fc91 117 /* Quick case, 1 byte value */
intrinseca 0:c7beea49fc91 118 result = byte;
intrinseca 0:c7beea49fc91 119 }
intrinseca 0:c7beea49fc91 120 else
intrinseca 0:c7beea49fc91 121 {
intrinseca 0:c7beea49fc91 122 /* Multibyte case */
intrinseca 0:c7beea49fc91 123 uint8_t bitpos = 7;
intrinseca 0:c7beea49fc91 124 result = byte & 0x7F;
intrinseca 0:c7beea49fc91 125
intrinseca 0:c7beea49fc91 126 do
intrinseca 0:c7beea49fc91 127 {
intrinseca 0:c7beea49fc91 128 if (bitpos >= 32)
intrinseca 0:c7beea49fc91 129 PB_RETURN_ERROR(stream, "varint overflow");
intrinseca 0:c7beea49fc91 130
intrinseca 0:c7beea49fc91 131 if (!pb_read(stream, &byte, 1))
intrinseca 0:c7beea49fc91 132 return false;
intrinseca 0:c7beea49fc91 133
intrinseca 0:c7beea49fc91 134 result |= (uint32_t)(byte & 0x7F) << bitpos;
intrinseca 0:c7beea49fc91 135 bitpos = (uint8_t)(bitpos + 7);
intrinseca 0:c7beea49fc91 136 } while (byte & 0x80);
intrinseca 0:c7beea49fc91 137 }
intrinseca 0:c7beea49fc91 138
intrinseca 0:c7beea49fc91 139 *dest = result;
intrinseca 0:c7beea49fc91 140 return true;
intrinseca 0:c7beea49fc91 141 }
intrinseca 0:c7beea49fc91 142
intrinseca 0:c7beea49fc91 143 bool checkreturn pb_decode_varint(pb_istream_t *stream, uint64_t *dest)
intrinseca 0:c7beea49fc91 144 {
intrinseca 0:c7beea49fc91 145 uint8_t byte;
intrinseca 0:c7beea49fc91 146 uint8_t bitpos = 0;
intrinseca 0:c7beea49fc91 147 uint64_t result = 0;
intrinseca 0:c7beea49fc91 148
intrinseca 0:c7beea49fc91 149 do
intrinseca 0:c7beea49fc91 150 {
intrinseca 0:c7beea49fc91 151 if (bitpos >= 64)
intrinseca 0:c7beea49fc91 152 PB_RETURN_ERROR(stream, "varint overflow");
intrinseca 0:c7beea49fc91 153
intrinseca 0:c7beea49fc91 154 if (!pb_read(stream, &byte, 1))
intrinseca 0:c7beea49fc91 155 return false;
intrinseca 0:c7beea49fc91 156
intrinseca 0:c7beea49fc91 157 result |= (uint64_t)(byte & 0x7F) << bitpos;
intrinseca 0:c7beea49fc91 158 bitpos = (uint8_t)(bitpos + 7);
intrinseca 0:c7beea49fc91 159 } while (byte & 0x80);
intrinseca 0:c7beea49fc91 160
intrinseca 0:c7beea49fc91 161 *dest = result;
intrinseca 0:c7beea49fc91 162 return true;
intrinseca 0:c7beea49fc91 163 }
intrinseca 0:c7beea49fc91 164
intrinseca 0:c7beea49fc91 165 bool checkreturn pb_skip_varint(pb_istream_t *stream)
intrinseca 0:c7beea49fc91 166 {
intrinseca 0:c7beea49fc91 167 uint8_t byte;
intrinseca 0:c7beea49fc91 168 do
intrinseca 0:c7beea49fc91 169 {
intrinseca 0:c7beea49fc91 170 if (!pb_read(stream, &byte, 1))
intrinseca 0:c7beea49fc91 171 return false;
intrinseca 0:c7beea49fc91 172 } while (byte & 0x80);
intrinseca 0:c7beea49fc91 173 return true;
intrinseca 0:c7beea49fc91 174 }
intrinseca 0:c7beea49fc91 175
intrinseca 0:c7beea49fc91 176 bool checkreturn pb_skip_string(pb_istream_t *stream)
intrinseca 0:c7beea49fc91 177 {
intrinseca 0:c7beea49fc91 178 uint32_t length;
intrinseca 0:c7beea49fc91 179 if (!pb_decode_varint32(stream, &length))
intrinseca 0:c7beea49fc91 180 return false;
intrinseca 0:c7beea49fc91 181
intrinseca 0:c7beea49fc91 182 return pb_read(stream, NULL, length);
intrinseca 0:c7beea49fc91 183 }
intrinseca 0:c7beea49fc91 184
intrinseca 0:c7beea49fc91 185 bool checkreturn pb_decode_tag(pb_istream_t *stream, pb_wire_type_t *wire_type, uint32_t *tag, bool *eof)
intrinseca 0:c7beea49fc91 186 {
intrinseca 0:c7beea49fc91 187 uint32_t temp;
intrinseca 0:c7beea49fc91 188 *eof = false;
intrinseca 0:c7beea49fc91 189 *wire_type = (pb_wire_type_t) 0;
intrinseca 0:c7beea49fc91 190 *tag = 0;
intrinseca 0:c7beea49fc91 191
intrinseca 0:c7beea49fc91 192 if (!pb_decode_varint32(stream, &temp))
intrinseca 0:c7beea49fc91 193 {
intrinseca 0:c7beea49fc91 194 if (stream->bytes_left == 0)
intrinseca 0:c7beea49fc91 195 *eof = true;
intrinseca 0:c7beea49fc91 196
intrinseca 0:c7beea49fc91 197 return false;
intrinseca 0:c7beea49fc91 198 }
intrinseca 0:c7beea49fc91 199
intrinseca 0:c7beea49fc91 200 if (temp == 0)
intrinseca 0:c7beea49fc91 201 {
intrinseca 0:c7beea49fc91 202 *eof = true; /* Special feature: allow 0-terminated messages. */
intrinseca 0:c7beea49fc91 203 return false;
intrinseca 0:c7beea49fc91 204 }
intrinseca 0:c7beea49fc91 205
intrinseca 0:c7beea49fc91 206 *tag = temp >> 3;
intrinseca 0:c7beea49fc91 207 *wire_type = (pb_wire_type_t)(temp & 7);
intrinseca 0:c7beea49fc91 208 return true;
intrinseca 0:c7beea49fc91 209 }
intrinseca 0:c7beea49fc91 210
intrinseca 0:c7beea49fc91 211 bool checkreturn pb_skip_field(pb_istream_t *stream, pb_wire_type_t wire_type)
intrinseca 0:c7beea49fc91 212 {
intrinseca 0:c7beea49fc91 213 switch (wire_type)
intrinseca 0:c7beea49fc91 214 {
intrinseca 0:c7beea49fc91 215 case PB_WT_VARINT: return pb_skip_varint(stream);
intrinseca 0:c7beea49fc91 216 case PB_WT_64BIT: return pb_read(stream, NULL, 8);
intrinseca 0:c7beea49fc91 217 case PB_WT_STRING: return pb_skip_string(stream);
intrinseca 0:c7beea49fc91 218 case PB_WT_32BIT: return pb_read(stream, NULL, 4);
intrinseca 0:c7beea49fc91 219 default: PB_RETURN_ERROR(stream, "invalid wire_type");
intrinseca 0:c7beea49fc91 220 }
intrinseca 0:c7beea49fc91 221 }
intrinseca 0:c7beea49fc91 222
intrinseca 0:c7beea49fc91 223 /* Read a raw value to buffer, for the purpose of passing it to callback as
intrinseca 0:c7beea49fc91 224 * a substream. Size is maximum size on call, and actual size on return.
intrinseca 0:c7beea49fc91 225 */
intrinseca 0:c7beea49fc91 226 static bool checkreturn read_raw_value(pb_istream_t *stream, pb_wire_type_t wire_type, uint8_t *buf, size_t *size)
intrinseca 0:c7beea49fc91 227 {
intrinseca 0:c7beea49fc91 228 size_t max_size = *size;
intrinseca 0:c7beea49fc91 229 switch (wire_type)
intrinseca 0:c7beea49fc91 230 {
intrinseca 0:c7beea49fc91 231 case PB_WT_VARINT:
intrinseca 0:c7beea49fc91 232 *size = 0;
intrinseca 0:c7beea49fc91 233 do
intrinseca 0:c7beea49fc91 234 {
intrinseca 0:c7beea49fc91 235 (*size)++;
intrinseca 0:c7beea49fc91 236 if (*size > max_size) return false;
intrinseca 0:c7beea49fc91 237 if (!pb_read(stream, buf, 1)) return false;
intrinseca 0:c7beea49fc91 238 } while (*buf++ & 0x80);
intrinseca 0:c7beea49fc91 239 return true;
intrinseca 0:c7beea49fc91 240
intrinseca 0:c7beea49fc91 241 case PB_WT_64BIT:
intrinseca 0:c7beea49fc91 242 *size = 8;
intrinseca 0:c7beea49fc91 243 return pb_read(stream, buf, 8);
intrinseca 0:c7beea49fc91 244
intrinseca 0:c7beea49fc91 245 case PB_WT_32BIT:
intrinseca 0:c7beea49fc91 246 *size = 4;
intrinseca 0:c7beea49fc91 247 return pb_read(stream, buf, 4);
intrinseca 0:c7beea49fc91 248
intrinseca 0:c7beea49fc91 249 default: PB_RETURN_ERROR(stream, "invalid wire_type");
intrinseca 0:c7beea49fc91 250 }
intrinseca 0:c7beea49fc91 251 }
intrinseca 0:c7beea49fc91 252
intrinseca 0:c7beea49fc91 253 /* Decode string length from stream and return a substream with limited length.
intrinseca 0:c7beea49fc91 254 * Remember to close the substream using pb_close_string_substream().
intrinseca 0:c7beea49fc91 255 */
intrinseca 0:c7beea49fc91 256 bool checkreturn pb_make_string_substream(pb_istream_t *stream, pb_istream_t *substream)
intrinseca 0:c7beea49fc91 257 {
intrinseca 0:c7beea49fc91 258 uint32_t size;
intrinseca 0:c7beea49fc91 259 if (!pb_decode_varint32(stream, &size))
intrinseca 0:c7beea49fc91 260 return false;
intrinseca 0:c7beea49fc91 261
intrinseca 0:c7beea49fc91 262 *substream = *stream;
intrinseca 0:c7beea49fc91 263 if (substream->bytes_left < size)
intrinseca 0:c7beea49fc91 264 PB_RETURN_ERROR(stream, "parent stream too short");
intrinseca 0:c7beea49fc91 265
intrinseca 0:c7beea49fc91 266 substream->bytes_left = size;
intrinseca 0:c7beea49fc91 267 stream->bytes_left -= size;
intrinseca 0:c7beea49fc91 268 return true;
intrinseca 0:c7beea49fc91 269 }
intrinseca 0:c7beea49fc91 270
intrinseca 0:c7beea49fc91 271 void pb_close_string_substream(pb_istream_t *stream, pb_istream_t *substream)
intrinseca 0:c7beea49fc91 272 {
intrinseca 0:c7beea49fc91 273 stream->state = substream->state;
intrinseca 0:c7beea49fc91 274
intrinseca 0:c7beea49fc91 275 #ifndef PB_NO_ERRMSG
intrinseca 0:c7beea49fc91 276 stream->errmsg = substream->errmsg;
intrinseca 0:c7beea49fc91 277 #endif
intrinseca 0:c7beea49fc91 278 }
intrinseca 0:c7beea49fc91 279
intrinseca 0:c7beea49fc91 280 /* Iterator for pb_field_t list */
intrinseca 0:c7beea49fc91 281 typedef struct {
intrinseca 0:c7beea49fc91 282 const pb_field_t *start; /* Start of the pb_field_t array */
intrinseca 0:c7beea49fc91 283 const pb_field_t *current; /* Current position of the iterator */
intrinseca 0:c7beea49fc91 284 unsigned field_index; /* Zero-based index of the field. */
intrinseca 0:c7beea49fc91 285 unsigned required_field_index; /* Zero-based index that counts only the required fields */
intrinseca 0:c7beea49fc91 286 void *dest_struct; /* Pointer to the destination structure to decode to */
intrinseca 0:c7beea49fc91 287 void *pData; /* Pointer where to store current field value */
intrinseca 0:c7beea49fc91 288 void *pSize; /* Pointer where to store the size of current array field */
intrinseca 0:c7beea49fc91 289 } pb_field_iterator_t;
intrinseca 0:c7beea49fc91 290
intrinseca 0:c7beea49fc91 291 static void pb_field_init(pb_field_iterator_t *iter, const pb_field_t *fields, void *dest_struct)
intrinseca 0:c7beea49fc91 292 {
intrinseca 0:c7beea49fc91 293 iter->start = iter->current = fields;
intrinseca 0:c7beea49fc91 294 iter->field_index = 0;
intrinseca 0:c7beea49fc91 295 iter->required_field_index = 0;
intrinseca 0:c7beea49fc91 296 iter->pData = (char*)dest_struct + iter->current->data_offset;
intrinseca 0:c7beea49fc91 297 iter->pSize = (char*)iter->pData + iter->current->size_offset;
intrinseca 0:c7beea49fc91 298 iter->dest_struct = dest_struct;
intrinseca 0:c7beea49fc91 299 }
intrinseca 0:c7beea49fc91 300
intrinseca 0:c7beea49fc91 301 static bool pb_field_next(pb_field_iterator_t *iter)
intrinseca 0:c7beea49fc91 302 {
intrinseca 0:c7beea49fc91 303 bool notwrapped = true;
intrinseca 0:c7beea49fc91 304 size_t prev_size = iter->current->data_size;
intrinseca 0:c7beea49fc91 305
intrinseca 0:c7beea49fc91 306 if (PB_HTYPE(iter->current->type) == PB_HTYPE_ARRAY)
intrinseca 0:c7beea49fc91 307 prev_size *= iter->current->array_size;
intrinseca 0:c7beea49fc91 308
intrinseca 0:c7beea49fc91 309 if (PB_HTYPE(iter->current->type) == PB_HTYPE_REQUIRED)
intrinseca 0:c7beea49fc91 310 iter->required_field_index++;
intrinseca 0:c7beea49fc91 311
intrinseca 0:c7beea49fc91 312 iter->current++;
intrinseca 0:c7beea49fc91 313 iter->field_index++;
intrinseca 0:c7beea49fc91 314 if (iter->current->tag == 0)
intrinseca 0:c7beea49fc91 315 {
intrinseca 0:c7beea49fc91 316 iter->current = iter->start;
intrinseca 0:c7beea49fc91 317 iter->field_index = 0;
intrinseca 0:c7beea49fc91 318 iter->required_field_index = 0;
intrinseca 0:c7beea49fc91 319 iter->pData = iter->dest_struct;
intrinseca 0:c7beea49fc91 320 prev_size = 0;
intrinseca 0:c7beea49fc91 321 notwrapped = false;
intrinseca 0:c7beea49fc91 322 }
intrinseca 0:c7beea49fc91 323
intrinseca 0:c7beea49fc91 324 iter->pData = (char*)iter->pData + prev_size + iter->current->data_offset;
intrinseca 0:c7beea49fc91 325 iter->pSize = (char*)iter->pData + iter->current->size_offset;
intrinseca 0:c7beea49fc91 326 return notwrapped;
intrinseca 0:c7beea49fc91 327 }
intrinseca 0:c7beea49fc91 328
intrinseca 0:c7beea49fc91 329 static bool checkreturn pb_field_find(pb_field_iterator_t *iter, uint32_t tag)
intrinseca 0:c7beea49fc91 330 {
intrinseca 0:c7beea49fc91 331 unsigned start = iter->field_index;
intrinseca 0:c7beea49fc91 332
intrinseca 0:c7beea49fc91 333 do {
intrinseca 0:c7beea49fc91 334 if (iter->current->tag == tag)
intrinseca 0:c7beea49fc91 335 return true;
intrinseca 0:c7beea49fc91 336 pb_field_next(iter);
intrinseca 0:c7beea49fc91 337 } while (iter->field_index != start);
intrinseca 0:c7beea49fc91 338
intrinseca 0:c7beea49fc91 339 return false;
intrinseca 0:c7beea49fc91 340 }
intrinseca 0:c7beea49fc91 341
intrinseca 0:c7beea49fc91 342 /*************************
intrinseca 0:c7beea49fc91 343 * Decode a single field *
intrinseca 0:c7beea49fc91 344 *************************/
intrinseca 0:c7beea49fc91 345
intrinseca 0:c7beea49fc91 346 static bool checkreturn decode_field(pb_istream_t *stream, pb_wire_type_t wire_type, pb_field_iterator_t *iter)
intrinseca 0:c7beea49fc91 347 {
intrinseca 0:c7beea49fc91 348 pb_decoder_t func = PB_DECODERS[PB_LTYPE(iter->current->type)];
intrinseca 0:c7beea49fc91 349
intrinseca 0:c7beea49fc91 350 switch (PB_HTYPE(iter->current->type))
intrinseca 0:c7beea49fc91 351 {
intrinseca 0:c7beea49fc91 352 case PB_HTYPE_REQUIRED:
intrinseca 0:c7beea49fc91 353 return func(stream, iter->current, iter->pData);
intrinseca 0:c7beea49fc91 354
intrinseca 0:c7beea49fc91 355 case PB_HTYPE_OPTIONAL:
intrinseca 0:c7beea49fc91 356 *(bool*)iter->pSize = true;
intrinseca 0:c7beea49fc91 357 return func(stream, iter->current, iter->pData);
intrinseca 0:c7beea49fc91 358
intrinseca 0:c7beea49fc91 359 case PB_HTYPE_ARRAY:
intrinseca 0:c7beea49fc91 360 if (wire_type == PB_WT_STRING
intrinseca 0:c7beea49fc91 361 && PB_LTYPE(iter->current->type) <= PB_LTYPE_LAST_PACKABLE)
intrinseca 0:c7beea49fc91 362 {
intrinseca 0:c7beea49fc91 363 /* Packed array */
intrinseca 0:c7beea49fc91 364 bool status = true;
intrinseca 0:c7beea49fc91 365 size_t *size = (size_t*)iter->pSize;
intrinseca 0:c7beea49fc91 366 pb_istream_t substream;
intrinseca 0:c7beea49fc91 367 if (!pb_make_string_substream(stream, &substream))
intrinseca 0:c7beea49fc91 368 return false;
intrinseca 0:c7beea49fc91 369
intrinseca 0:c7beea49fc91 370 while (substream.bytes_left && *size < iter->current->array_size)
intrinseca 0:c7beea49fc91 371 {
intrinseca 0:c7beea49fc91 372 void *pItem = (uint8_t*)iter->pData + iter->current->data_size * (*size);
intrinseca 0:c7beea49fc91 373 if (!func(&substream, iter->current, pItem))
intrinseca 0:c7beea49fc91 374 {
intrinseca 0:c7beea49fc91 375 status = false;
intrinseca 0:c7beea49fc91 376 break;
intrinseca 0:c7beea49fc91 377 }
intrinseca 0:c7beea49fc91 378 (*size)++;
intrinseca 0:c7beea49fc91 379 }
intrinseca 0:c7beea49fc91 380 pb_close_string_substream(stream, &substream);
intrinseca 0:c7beea49fc91 381
intrinseca 0:c7beea49fc91 382 if (substream.bytes_left != 0)
intrinseca 0:c7beea49fc91 383 PB_RETURN_ERROR(stream, "array overflow");
intrinseca 0:c7beea49fc91 384
intrinseca 0:c7beea49fc91 385 return status;
intrinseca 0:c7beea49fc91 386 }
intrinseca 0:c7beea49fc91 387 else
intrinseca 0:c7beea49fc91 388 {
intrinseca 0:c7beea49fc91 389 /* Repeated field */
intrinseca 0:c7beea49fc91 390 size_t *size = (size_t*)iter->pSize;
intrinseca 0:c7beea49fc91 391 void *pItem = (uint8_t*)iter->pData + iter->current->data_size * (*size);
intrinseca 0:c7beea49fc91 392 if (*size >= iter->current->array_size)
intrinseca 0:c7beea49fc91 393 PB_RETURN_ERROR(stream, "array overflow");
intrinseca 0:c7beea49fc91 394
intrinseca 0:c7beea49fc91 395 (*size)++;
intrinseca 0:c7beea49fc91 396 return func(stream, iter->current, pItem);
intrinseca 0:c7beea49fc91 397 }
intrinseca 0:c7beea49fc91 398
intrinseca 0:c7beea49fc91 399 case PB_HTYPE_CALLBACK:
intrinseca 0:c7beea49fc91 400 {
intrinseca 0:c7beea49fc91 401 pb_callback_t *pCallback = (pb_callback_t*)iter->pData;
intrinseca 0:c7beea49fc91 402
intrinseca 0:c7beea49fc91 403 if (pCallback->funcs.decode == NULL)
intrinseca 0:c7beea49fc91 404 return pb_skip_field(stream, wire_type);
intrinseca 0:c7beea49fc91 405
intrinseca 0:c7beea49fc91 406 if (wire_type == PB_WT_STRING)
intrinseca 0:c7beea49fc91 407 {
intrinseca 0:c7beea49fc91 408 pb_istream_t substream;
intrinseca 0:c7beea49fc91 409
intrinseca 0:c7beea49fc91 410 if (!pb_make_string_substream(stream, &substream))
intrinseca 0:c7beea49fc91 411 return false;
intrinseca 0:c7beea49fc91 412
intrinseca 0:c7beea49fc91 413 while (substream.bytes_left)
intrinseca 0:c7beea49fc91 414 {
intrinseca 0:c7beea49fc91 415 if (!pCallback->funcs.decode(&substream, iter->current, pCallback->arg))
intrinseca 0:c7beea49fc91 416 PB_RETURN_ERROR(stream, "callback failed");
intrinseca 0:c7beea49fc91 417 }
intrinseca 0:c7beea49fc91 418
intrinseca 0:c7beea49fc91 419 pb_close_string_substream(stream, &substream);
intrinseca 0:c7beea49fc91 420 return true;
intrinseca 0:c7beea49fc91 421 }
intrinseca 0:c7beea49fc91 422 else
intrinseca 0:c7beea49fc91 423 {
intrinseca 0:c7beea49fc91 424 /* Copy the single scalar value to stack.
intrinseca 0:c7beea49fc91 425 * This is required so that we can limit the stream length,
intrinseca 0:c7beea49fc91 426 * which in turn allows to use same callback for packed and
intrinseca 0:c7beea49fc91 427 * not-packed fields. */
intrinseca 0:c7beea49fc91 428 pb_istream_t substream;
intrinseca 0:c7beea49fc91 429 uint8_t buffer[10];
intrinseca 0:c7beea49fc91 430 size_t size = sizeof(buffer);
intrinseca 0:c7beea49fc91 431
intrinseca 0:c7beea49fc91 432 if (!read_raw_value(stream, wire_type, buffer, &size))
intrinseca 0:c7beea49fc91 433 return false;
intrinseca 0:c7beea49fc91 434 substream = pb_istream_from_buffer(buffer, size);
intrinseca 0:c7beea49fc91 435
intrinseca 0:c7beea49fc91 436 return pCallback->funcs.decode(&substream, iter->current, pCallback->arg);
intrinseca 0:c7beea49fc91 437 }
intrinseca 0:c7beea49fc91 438 }
intrinseca 0:c7beea49fc91 439
intrinseca 0:c7beea49fc91 440 default:
intrinseca 0:c7beea49fc91 441 PB_RETURN_ERROR(stream, "invalid field type");
intrinseca 0:c7beea49fc91 442 }
intrinseca 0:c7beea49fc91 443 }
intrinseca 0:c7beea49fc91 444
intrinseca 0:c7beea49fc91 445 /* Initialize message fields to default values, recursively */
intrinseca 0:c7beea49fc91 446 static void pb_message_set_to_defaults(const pb_field_t fields[], void *dest_struct)
intrinseca 0:c7beea49fc91 447 {
intrinseca 0:c7beea49fc91 448 pb_field_iterator_t iter;
intrinseca 0:c7beea49fc91 449 pb_field_init(&iter, fields, dest_struct);
intrinseca 0:c7beea49fc91 450
intrinseca 0:c7beea49fc91 451 /* Initialize size/has fields and apply default values */
intrinseca 0:c7beea49fc91 452 do
intrinseca 0:c7beea49fc91 453 {
intrinseca 0:c7beea49fc91 454 if (iter.current->tag == 0)
intrinseca 0:c7beea49fc91 455 continue;
intrinseca 0:c7beea49fc91 456
intrinseca 0:c7beea49fc91 457 /* Initialize the size field for optional/repeated fields to 0. */
intrinseca 0:c7beea49fc91 458 if (PB_HTYPE(iter.current->type) == PB_HTYPE_OPTIONAL)
intrinseca 0:c7beea49fc91 459 {
intrinseca 0:c7beea49fc91 460 *(bool*)iter.pSize = false;
intrinseca 0:c7beea49fc91 461 }
intrinseca 0:c7beea49fc91 462 else if (PB_HTYPE(iter.current->type) == PB_HTYPE_ARRAY)
intrinseca 0:c7beea49fc91 463 {
intrinseca 0:c7beea49fc91 464 *(size_t*)iter.pSize = 0;
intrinseca 0:c7beea49fc91 465 continue; /* Array is empty, no need to initialize contents */
intrinseca 0:c7beea49fc91 466 }
intrinseca 0:c7beea49fc91 467
intrinseca 0:c7beea49fc91 468 /* Initialize field contents to default value */
intrinseca 0:c7beea49fc91 469 if (PB_HTYPE(iter.current->type) == PB_HTYPE_CALLBACK)
intrinseca 0:c7beea49fc91 470 {
intrinseca 0:c7beea49fc91 471 continue; /* Don't overwrite callback */
intrinseca 0:c7beea49fc91 472 }
intrinseca 0:c7beea49fc91 473 else if (PB_LTYPE(iter.current->type) == PB_LTYPE_SUBMESSAGE)
intrinseca 0:c7beea49fc91 474 {
intrinseca 0:c7beea49fc91 475 pb_message_set_to_defaults((const pb_field_t *) iter.current->ptr, iter.pData);
intrinseca 0:c7beea49fc91 476 }
intrinseca 0:c7beea49fc91 477 else if (iter.current->ptr != NULL)
intrinseca 0:c7beea49fc91 478 {
intrinseca 0:c7beea49fc91 479 memcpy(iter.pData, iter.current->ptr, iter.current->data_size);
intrinseca 0:c7beea49fc91 480 }
intrinseca 0:c7beea49fc91 481 else
intrinseca 0:c7beea49fc91 482 {
intrinseca 0:c7beea49fc91 483 memset(iter.pData, 0, iter.current->data_size);
intrinseca 0:c7beea49fc91 484 }
intrinseca 0:c7beea49fc91 485 } while (pb_field_next(&iter));
intrinseca 0:c7beea49fc91 486 }
intrinseca 0:c7beea49fc91 487
intrinseca 0:c7beea49fc91 488 /*********************
intrinseca 0:c7beea49fc91 489 * Decode all fields *
intrinseca 0:c7beea49fc91 490 *********************/
intrinseca 0:c7beea49fc91 491
intrinseca 0:c7beea49fc91 492 bool checkreturn pb_decode_noinit(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct)
intrinseca 0:c7beea49fc91 493 {
intrinseca 0:c7beea49fc91 494 uint8_t fields_seen[(PB_MAX_REQUIRED_FIELDS + 7) / 8] = {0}; /* Used to check for required fields */
intrinseca 0:c7beea49fc91 495 pb_field_iterator_t iter;
intrinseca 0:c7beea49fc91 496
intrinseca 0:c7beea49fc91 497 pb_field_init(&iter, fields, dest_struct);
intrinseca 0:c7beea49fc91 498
intrinseca 0:c7beea49fc91 499 while (stream->bytes_left)
intrinseca 0:c7beea49fc91 500 {
intrinseca 0:c7beea49fc91 501 uint32_t tag;
intrinseca 0:c7beea49fc91 502 pb_wire_type_t wire_type;
intrinseca 0:c7beea49fc91 503 bool eof;
intrinseca 0:c7beea49fc91 504
intrinseca 0:c7beea49fc91 505 if (!pb_decode_tag(stream, &wire_type, &tag, &eof))
intrinseca 0:c7beea49fc91 506 {
intrinseca 0:c7beea49fc91 507 if (eof)
intrinseca 0:c7beea49fc91 508 break;
intrinseca 0:c7beea49fc91 509 else
intrinseca 0:c7beea49fc91 510 return false;
intrinseca 0:c7beea49fc91 511 }
intrinseca 0:c7beea49fc91 512
intrinseca 0:c7beea49fc91 513 if (!pb_field_find(&iter, tag))
intrinseca 0:c7beea49fc91 514 {
intrinseca 0:c7beea49fc91 515 /* No match found, skip data */
intrinseca 0:c7beea49fc91 516 if (!pb_skip_field(stream, wire_type))
intrinseca 0:c7beea49fc91 517 return false;
intrinseca 0:c7beea49fc91 518 continue;
intrinseca 0:c7beea49fc91 519 }
intrinseca 0:c7beea49fc91 520
intrinseca 0:c7beea49fc91 521 if (PB_HTYPE(iter.current->type) == PB_HTYPE_REQUIRED
intrinseca 0:c7beea49fc91 522 && iter.required_field_index < PB_MAX_REQUIRED_FIELDS)
intrinseca 0:c7beea49fc91 523 {
intrinseca 0:c7beea49fc91 524 fields_seen[iter.required_field_index >> 3] |= (uint8_t)(1 << (iter.required_field_index & 7));
intrinseca 0:c7beea49fc91 525 }
intrinseca 0:c7beea49fc91 526
intrinseca 0:c7beea49fc91 527 if (!decode_field(stream, wire_type, &iter))
intrinseca 0:c7beea49fc91 528 return false;
intrinseca 0:c7beea49fc91 529 }
intrinseca 0:c7beea49fc91 530
intrinseca 0:c7beea49fc91 531 /* Check that all required fields were present. */
intrinseca 0:c7beea49fc91 532 {
intrinseca 0:c7beea49fc91 533 /* First figure out the number of required fields by
intrinseca 0:c7beea49fc91 534 * seeking to the end of the field array. Usually we
intrinseca 0:c7beea49fc91 535 * are already close to end after decoding.
intrinseca 0:c7beea49fc91 536 */
intrinseca 0:c7beea49fc91 537 unsigned req_field_count;
intrinseca 0:c7beea49fc91 538 pb_type_t last_type;
intrinseca 0:c7beea49fc91 539 unsigned i;
intrinseca 0:c7beea49fc91 540 do {
intrinseca 0:c7beea49fc91 541 req_field_count = iter.required_field_index;
intrinseca 0:c7beea49fc91 542 last_type = iter.current->type;
intrinseca 0:c7beea49fc91 543 } while (pb_field_next(&iter));
intrinseca 0:c7beea49fc91 544
intrinseca 0:c7beea49fc91 545 /* Fixup if last field was also required. */
intrinseca 0:c7beea49fc91 546 if (PB_HTYPE(last_type) == PB_HTYPE_REQUIRED)
intrinseca 0:c7beea49fc91 547 req_field_count++;
intrinseca 0:c7beea49fc91 548
intrinseca 0:c7beea49fc91 549 /* Check the whole bytes */
intrinseca 0:c7beea49fc91 550 for (i = 0; i < (req_field_count >> 3); i++)
intrinseca 0:c7beea49fc91 551 {
intrinseca 0:c7beea49fc91 552 if (fields_seen[i] != 0xFF)
intrinseca 0:c7beea49fc91 553 PB_RETURN_ERROR(stream, "missing required field");
intrinseca 0:c7beea49fc91 554 }
intrinseca 0:c7beea49fc91 555
intrinseca 0:c7beea49fc91 556 /* Check the remaining bits */
intrinseca 0:c7beea49fc91 557 if (fields_seen[req_field_count >> 3] != (0xFF >> (8 - (req_field_count & 7))))
intrinseca 0:c7beea49fc91 558 PB_RETURN_ERROR(stream, "missing required field");
intrinseca 0:c7beea49fc91 559 }
intrinseca 0:c7beea49fc91 560
intrinseca 0:c7beea49fc91 561 return true;
intrinseca 0:c7beea49fc91 562 }
intrinseca 0:c7beea49fc91 563
intrinseca 0:c7beea49fc91 564 bool checkreturn pb_decode(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct)
intrinseca 0:c7beea49fc91 565 {
intrinseca 0:c7beea49fc91 566 pb_message_set_to_defaults(fields, dest_struct);
intrinseca 0:c7beea49fc91 567 return pb_decode_noinit(stream, fields, dest_struct);
intrinseca 0:c7beea49fc91 568 }
intrinseca 0:c7beea49fc91 569
intrinseca 0:c7beea49fc91 570 /* Field decoders */
intrinseca 0:c7beea49fc91 571
intrinseca 0:c7beea49fc91 572 bool pb_decode_svarint(pb_istream_t *stream, int64_t *dest)
intrinseca 0:c7beea49fc91 573 {
intrinseca 0:c7beea49fc91 574 uint64_t value;
intrinseca 0:c7beea49fc91 575 if (!pb_decode_varint(stream, &value))
intrinseca 0:c7beea49fc91 576 return false;
intrinseca 0:c7beea49fc91 577
intrinseca 0:c7beea49fc91 578 if (value & 1)
intrinseca 0:c7beea49fc91 579 *dest = (int64_t)(~(value >> 1));
intrinseca 0:c7beea49fc91 580 else
intrinseca 0:c7beea49fc91 581 *dest = (int64_t)(value >> 1);
intrinseca 0:c7beea49fc91 582
intrinseca 0:c7beea49fc91 583 return true;
intrinseca 0:c7beea49fc91 584 }
intrinseca 0:c7beea49fc91 585
intrinseca 0:c7beea49fc91 586 bool pb_decode_fixed32(pb_istream_t *stream, void *dest)
intrinseca 0:c7beea49fc91 587 {
intrinseca 0:c7beea49fc91 588 #ifdef __BIG_ENDIAN__
intrinseca 0:c7beea49fc91 589 uint8_t *bytes = (uint8_t*)dest;
intrinseca 0:c7beea49fc91 590 uint8_t lebytes[4];
intrinseca 0:c7beea49fc91 591
intrinseca 0:c7beea49fc91 592 if (!pb_read(stream, lebytes, 4))
intrinseca 0:c7beea49fc91 593 return false;
intrinseca 0:c7beea49fc91 594
intrinseca 0:c7beea49fc91 595 bytes[0] = lebytes[3];
intrinseca 0:c7beea49fc91 596 bytes[1] = lebytes[2];
intrinseca 0:c7beea49fc91 597 bytes[2] = lebytes[1];
intrinseca 0:c7beea49fc91 598 bytes[3] = lebytes[0];
intrinseca 0:c7beea49fc91 599 return true;
intrinseca 0:c7beea49fc91 600 #else
intrinseca 0:c7beea49fc91 601 return pb_read(stream, (uint8_t*)dest, 4);
intrinseca 0:c7beea49fc91 602 #endif
intrinseca 0:c7beea49fc91 603 }
intrinseca 0:c7beea49fc91 604
intrinseca 0:c7beea49fc91 605 bool pb_decode_fixed64(pb_istream_t *stream, void *dest)
intrinseca 0:c7beea49fc91 606 {
intrinseca 0:c7beea49fc91 607 #ifdef __BIG_ENDIAN__
intrinseca 0:c7beea49fc91 608 uint8_t *bytes = (uint8_t*)dest;
intrinseca 0:c7beea49fc91 609 uint8_t lebytes[8];
intrinseca 0:c7beea49fc91 610
intrinseca 0:c7beea49fc91 611 if (!pb_read(stream, lebytes, 8))
intrinseca 0:c7beea49fc91 612 return false;
intrinseca 0:c7beea49fc91 613
intrinseca 0:c7beea49fc91 614 bytes[0] = lebytes[7];
intrinseca 0:c7beea49fc91 615 bytes[1] = lebytes[6];
intrinseca 0:c7beea49fc91 616 bytes[2] = lebytes[5];
intrinseca 0:c7beea49fc91 617 bytes[3] = lebytes[4];
intrinseca 0:c7beea49fc91 618 bytes[4] = lebytes[3];
intrinseca 0:c7beea49fc91 619 bytes[5] = lebytes[2];
intrinseca 0:c7beea49fc91 620 bytes[6] = lebytes[1];
intrinseca 0:c7beea49fc91 621 bytes[7] = lebytes[0];
intrinseca 0:c7beea49fc91 622 return true;
intrinseca 0:c7beea49fc91 623 #else
intrinseca 0:c7beea49fc91 624 return pb_read(stream, (uint8_t*)dest, 8);
intrinseca 0:c7beea49fc91 625 #endif
intrinseca 0:c7beea49fc91 626 }
intrinseca 0:c7beea49fc91 627
intrinseca 0:c7beea49fc91 628 bool checkreturn pb_dec_varint(pb_istream_t *stream, const pb_field_t *field, void *dest)
intrinseca 0:c7beea49fc91 629 {
intrinseca 0:c7beea49fc91 630 uint64_t value;
intrinseca 0:c7beea49fc91 631 bool status = pb_decode_varint(stream, &value);
intrinseca 0:c7beea49fc91 632
intrinseca 0:c7beea49fc91 633 switch (field->data_size)
intrinseca 0:c7beea49fc91 634 {
intrinseca 0:c7beea49fc91 635 case 1: *(uint8_t*)dest = (uint8_t)value; break;
intrinseca 0:c7beea49fc91 636 case 2: *(uint16_t*)dest = (uint16_t)value; break;
intrinseca 0:c7beea49fc91 637 case 4: *(uint32_t*)dest = (uint32_t)value; break;
intrinseca 0:c7beea49fc91 638 case 8: *(uint64_t*)dest = value; break;
intrinseca 0:c7beea49fc91 639 default: PB_RETURN_ERROR(stream, "invalid data_size");
intrinseca 0:c7beea49fc91 640 }
intrinseca 0:c7beea49fc91 641
intrinseca 0:c7beea49fc91 642 return status;
intrinseca 0:c7beea49fc91 643 }
intrinseca 0:c7beea49fc91 644
intrinseca 0:c7beea49fc91 645 bool checkreturn pb_dec_svarint(pb_istream_t *stream, const pb_field_t *field, void *dest)
intrinseca 0:c7beea49fc91 646 {
intrinseca 0:c7beea49fc91 647 int64_t value;
intrinseca 0:c7beea49fc91 648 bool status = pb_decode_svarint(stream, &value);
intrinseca 0:c7beea49fc91 649
intrinseca 0:c7beea49fc91 650 switch (field->data_size)
intrinseca 0:c7beea49fc91 651 {
intrinseca 0:c7beea49fc91 652 case 4: *(int32_t*)dest = (int32_t)value; break;
intrinseca 0:c7beea49fc91 653 case 8: *(int64_t*)dest = value; break;
intrinseca 0:c7beea49fc91 654 default: PB_RETURN_ERROR(stream, "invalid data_size");
intrinseca 0:c7beea49fc91 655 }
intrinseca 0:c7beea49fc91 656
intrinseca 0:c7beea49fc91 657 return status;
intrinseca 0:c7beea49fc91 658 }
intrinseca 0:c7beea49fc91 659
intrinseca 0:c7beea49fc91 660 bool checkreturn pb_dec_fixed32(pb_istream_t *stream, const pb_field_t *field, void *dest)
intrinseca 0:c7beea49fc91 661 {
intrinseca 0:c7beea49fc91 662 UNUSED(field);
intrinseca 0:c7beea49fc91 663 return pb_decode_fixed32(stream, dest);
intrinseca 0:c7beea49fc91 664 }
intrinseca 0:c7beea49fc91 665
intrinseca 0:c7beea49fc91 666 bool checkreturn pb_dec_fixed64(pb_istream_t *stream, const pb_field_t *field, void *dest)
intrinseca 0:c7beea49fc91 667 {
intrinseca 0:c7beea49fc91 668 UNUSED(field);
intrinseca 0:c7beea49fc91 669 return pb_decode_fixed64(stream, dest);
intrinseca 0:c7beea49fc91 670 }
intrinseca 0:c7beea49fc91 671
intrinseca 0:c7beea49fc91 672 bool checkreturn pb_dec_bytes(pb_istream_t *stream, const pb_field_t *field, void *dest)
intrinseca 0:c7beea49fc91 673 {
intrinseca 0:c7beea49fc91 674 pb_bytes_array_t *x = (pb_bytes_array_t*)dest;
intrinseca 0:c7beea49fc91 675
intrinseca 0:c7beea49fc91 676 uint32_t temp;
intrinseca 0:c7beea49fc91 677 if (!pb_decode_varint32(stream, &temp))
intrinseca 0:c7beea49fc91 678 return false;
intrinseca 0:c7beea49fc91 679 x->size = temp;
intrinseca 0:c7beea49fc91 680
intrinseca 0:c7beea49fc91 681 /* Check length, noting the space taken by the size_t header. */
intrinseca 0:c7beea49fc91 682 if (x->size > field->data_size - offsetof(pb_bytes_array_t, bytes))
intrinseca 0:c7beea49fc91 683 PB_RETURN_ERROR(stream, "bytes overflow");
intrinseca 0:c7beea49fc91 684
intrinseca 0:c7beea49fc91 685 return pb_read(stream, x->bytes, x->size);
intrinseca 0:c7beea49fc91 686 }
intrinseca 0:c7beea49fc91 687
intrinseca 0:c7beea49fc91 688 bool checkreturn pb_dec_string(pb_istream_t *stream, const pb_field_t *field, void *dest)
intrinseca 0:c7beea49fc91 689 {
intrinseca 0:c7beea49fc91 690 uint32_t size;
intrinseca 0:c7beea49fc91 691 bool status;
intrinseca 0:c7beea49fc91 692 if (!pb_decode_varint32(stream, &size))
intrinseca 0:c7beea49fc91 693 return false;
intrinseca 0:c7beea49fc91 694
intrinseca 0:c7beea49fc91 695 /* Check length, noting the null terminator */
intrinseca 0:c7beea49fc91 696 if (size + 1 > field->data_size)
intrinseca 0:c7beea49fc91 697 PB_RETURN_ERROR(stream, "string overflow");
intrinseca 0:c7beea49fc91 698
intrinseca 0:c7beea49fc91 699 status = pb_read(stream, (uint8_t*)dest, size);
intrinseca 0:c7beea49fc91 700 *((uint8_t*)dest + size) = 0;
intrinseca 0:c7beea49fc91 701 return status;
intrinseca 0:c7beea49fc91 702 }
intrinseca 0:c7beea49fc91 703
intrinseca 0:c7beea49fc91 704 bool checkreturn pb_dec_submessage(pb_istream_t *stream, const pb_field_t *field, void *dest)
intrinseca 0:c7beea49fc91 705 {
intrinseca 0:c7beea49fc91 706 bool status;
intrinseca 0:c7beea49fc91 707 pb_istream_t substream;
intrinseca 0:c7beea49fc91 708 const pb_field_t* submsg_fields = (const pb_field_t*)field->ptr;
intrinseca 0:c7beea49fc91 709
intrinseca 0:c7beea49fc91 710 if (!pb_make_string_substream(stream, &substream))
intrinseca 0:c7beea49fc91 711 return false;
intrinseca 0:c7beea49fc91 712
intrinseca 0:c7beea49fc91 713 if (field->ptr == NULL)
intrinseca 0:c7beea49fc91 714 PB_RETURN_ERROR(stream, "invalid field descriptor");
intrinseca 0:c7beea49fc91 715
intrinseca 0:c7beea49fc91 716 /* New array entries need to be initialized, while required and optional
intrinseca 0:c7beea49fc91 717 * submessages have already been initialized in the top-level pb_decode. */
intrinseca 0:c7beea49fc91 718 if (PB_HTYPE(field->type) == PB_HTYPE_ARRAY)
intrinseca 0:c7beea49fc91 719 status = pb_decode(&substream, submsg_fields, dest);
intrinseca 0:c7beea49fc91 720 else
intrinseca 0:c7beea49fc91 721 status = pb_decode_noinit(&substream, submsg_fields, dest);
intrinseca 0:c7beea49fc91 722
intrinseca 0:c7beea49fc91 723 pb_close_string_substream(stream, &substream);
intrinseca 0:c7beea49fc91 724 return status;
intrinseca 0:c7beea49fc91 725 }