src/yaml_private.h

   1
   2 #if HAVE_CONFIG_H
   3 #include <config.h>
   4 #endif
   5
   6 #include <yaml.h>
   7
   8 #include <assert.h>
   9 #include <limits.h>
  10 #include <stddef.h>
  11
  12 #ifndef _MSC_VER
  13 #include <stdint.h>
  14 #else
  15 #ifdef _WIN64
  16 #define PTRDIFF_MAX _I64_MAX
  17 #else
  18 #define PTRDIFF_MAX INT_MAX
  19 #endif
  20 #endif
  21
  22 /*
  23  * Memory management.
  24  */
  25
  26 YAML_DECLARE(void *)
  27 yaml_malloc(size_t size);
  28
  29 YAML_DECLARE(void *)
  30 yaml_realloc(void *ptr, size_t size);
  31
  32 YAML_DECLARE(void)
  33 yaml_free(void *ptr);
  34
  35 YAML_DECLARE(yaml_char_t *)
  36 yaml_strdup(const yaml_char_t *);
  37
  38 /*
  39  * Reader: Ensure that the buffer contains at least `length` characters.
  40  */
  41
  42 YAML_DECLARE(int)
  43 yaml_parser_update_buffer(yaml_parser_t *parser, size_t length);
  44
  45 /*
  46  * Scanner: Ensure that the token stack contains at least one token ready.
  47  */
  48
  49 YAML_DECLARE(int)
  50 yaml_parser_fetch_more_tokens(yaml_parser_t *parser);
  51
  52 /*
  53  * The size of the input raw buffer.
  54  */
  55
  56 #define INPUT_RAW_BUFFER_SIZE   16384
  57
  58 /*
  59  * The size of the input buffer.
  60  *
  61  * It should be possible to decode the whole raw buffer.
  62  */
  63
  64 #define INPUT_BUFFER_SIZE       (INPUT_RAW_BUFFER_SIZE*3)
  65
  66 /*
  67  * The size of the output buffer.
  68  */
  69
  70 #define OUTPUT_BUFFER_SIZE      16384
  71
  72 /*
  73  * The size of the output raw buffer.
  74  *
  75  * It should be possible to encode the whole output buffer.
  76  */
  77
  78 #define OUTPUT_RAW_BUFFER_SIZE  (OUTPUT_BUFFER_SIZE*2+2)
  79
  80 /*
  81  * The size of other stacks and queues.
  82  */
  83
  84 #define INITIAL_STACK_SIZE  16
  85 #define INITIAL_QUEUE_SIZE  16
  86 #define INITIAL_STRING_SIZE 16
  87
  88 /*
  89  * Buffer management.
  90  */
  91
  92 #define BUFFER_INIT(context,buffer,size)                                        \
  93     (((buffer).start = yaml_malloc(size)) ?                                     \
  94         ((buffer).last = (buffer).pointer = (buffer).start,                     \
  95          (buffer).end = (buffer).start+(size),                                  \
  96          1) :                                                                   \
  97         ((context)->error = YAML_MEMORY_ERROR,                                  \
  98          0))
  99
 100 #define BUFFER_DEL(context,buffer)                                              \
 101     (yaml_free((buffer).start),                                                 \
 102      (buffer).start = (buffer).pointer = (buffer).end = 0)
 103
 104 /*
 105  * String management.
 106  */
 107
 108 typedef struct {
 109     yaml_char_t *start;
 110     yaml_char_t *end;
 111     yaml_char_t *pointer;
 112 } yaml_string_t;
 113
 114 YAML_DECLARE(int)
 115 yaml_string_extend(yaml_char_t **start,
 116         yaml_char_t **pointer, yaml_char_t **end);
 117
 118 YAML_DECLARE(int)
 119 yaml_string_join(
 120         yaml_char_t **a_start, yaml_char_t **a_pointer, yaml_char_t **a_end,
 121         yaml_char_t **b_start, yaml_char_t **b_pointer, yaml_char_t **b_end);
 122
 123 #define NULL_STRING { NULL, NULL, NULL }
 124
 125 #define STRING(string,length)   { (string), (string)+(length), (string) }
 126
 127 #define STRING_ASSIGN(value,string,length)                                      \
 128     ((value).start = (string),                                                  \
 129      (value).end = (string)+(length),                                           \
 130      (value).pointer = (string))
 131
 132 #define STRING_INIT(context,string,size)                                        \
 133     (((string).start = yaml_malloc(size)) ?                                     \
 134         ((string).pointer = (string).start,                                     \
 135          (string).end = (string).start+(size),                                  \
 136          memset((string).start, 0, (size)),                                     \
 137          1) :                                                                   \
 138         ((context)->error = YAML_MEMORY_ERROR,                                  \
 139          0))
 140
 141 #define STRING_DEL(context,string)                                              \
 142     (yaml_free((string).start),                                                 \
 143      (string).start = (string).pointer = (string).end = 0)
 144
 145 #define STRING_EXTEND(context,string)                                           \
 146     (((string).pointer+5 < (string).end)                                        \
 147         || yaml_string_extend(&(string).start,                                  \
 148             &(string).pointer, &(string).end))
 149
 150 #define CLEAR(context,string)                                                   \
 151     ((string).pointer = (string).start,                                         \
 152      memset((string).start, 0, (string).end-(string).start))
 153
 154 #define JOIN(context,string_a,string_b)                                         \
 155     ((yaml_string_join(&(string_a).start, &(string_a).pointer,                  \
 156                        &(string_a).end, &(string_b).start,                      \
 157                        &(string_b).pointer, &(string_b).end)) ?                 \
 158         ((string_b).pointer = (string_b).start,                                 \
 159          1) :                                                                   \
 160         ((context)->error = YAML_MEMORY_ERROR,                                  \
 161          0))
 162
 163 /*
 164  * String check operations.
 165  */
 166
 167 /*
 168  * Check the octet at the specified position.
 169  */
 170
 171 #define CHECK_AT(string,octet,offset)                                           \
 172     ((string).pointer[offset] == (yaml_char_t)(octet))
 173
 174 /*
 175  * Check the current octet in the buffer.
 176  */
 177
 178 #define CHECK(string,octet) CHECK_AT((string),(octet),0)
 179
 180 /*
 181  * Check if the character at the specified position is an alphabetical
 182  * character, a digit, '_', or '-'.
 183  */
 184
 185 #define IS_ALPHA_AT(string,offset)                                              \
 186      (((string).pointer[offset] >= (yaml_char_t) '0' &&                         \
 187        (string).pointer[offset] <= (yaml_char_t) '9') ||                        \
 188       ((string).pointer[offset] >= (yaml_char_t) 'A' &&                         \
 189        (string).pointer[offset] <= (yaml_char_t) 'Z') ||                        \
 190       ((string).pointer[offset] >= (yaml_char_t) 'a' &&                         \
 191        (string).pointer[offset] <= (yaml_char_t) 'z') ||                        \
 192       (string).pointer[offset] == '_' ||                                        \
 193       (string).pointer[offset] == '-')
 194
 195 #define IS_ALPHA(string)    IS_ALPHA_AT((string),0)
 196
 197 /*
 198  * Check if the character at the specified position is a digit.
 199  */
 200
 201 #define IS_DIGIT_AT(string,offset)                                              \
 202      (((string).pointer[offset] >= (yaml_char_t) '0' &&                         \
 203        (string).pointer[offset] <= (yaml_char_t) '9'))
 204
 205 #define IS_DIGIT(string)    IS_DIGIT_AT((string),0)
 206
 207 /*
 208  * Get the value of a digit.
 209  */
 210
 211 #define AS_DIGIT_AT(string,offset)                                              \
 212      ((string).pointer[offset] - (yaml_char_t) '0')
 213
 214 #define AS_DIGIT(string)    AS_DIGIT_AT((string),0)
 215
 216 /*
 217  * Check if the character at the specified position is a hex-digit.
 218  */
 219
 220 #define IS_HEX_AT(string,offset)                                                \
 221      (((string).pointer[offset] >= (yaml_char_t) '0' &&                         \
 222        (string).pointer[offset] <= (yaml_char_t) '9') ||                        \
 223       ((string).pointer[offset] >= (yaml_char_t) 'A' &&                         \
 224        (string).pointer[offset] <= (yaml_char_t) 'F') ||                        \
 225       ((string).pointer[offset] >= (yaml_char_t) 'a' &&                         \
 226        (string).pointer[offset] <= (yaml_char_t) 'f'))
 227
 228 #define IS_HEX(string)    IS_HEX_AT((string),0)
 229
 230 /*
 231  * Get the value of a hex-digit.
 232  */
 233
 234 #define AS_HEX_AT(string,offset)                                                \
 235       (((string).pointer[offset] >= (yaml_char_t) 'A' &&                        \
 236         (string).pointer[offset] <= (yaml_char_t) 'F') ?                        \
 237        ((string).pointer[offset] - (yaml_char_t) 'A' + 10) :                    \
 238        ((string).pointer[offset] >= (yaml_char_t) 'a' &&                        \
 239         (string).pointer[offset] <= (yaml_char_t) 'f') ?                        \
 240        ((string).pointer[offset] - (yaml_char_t) 'a' + 10) :                    \
 241        ((string).pointer[offset] - (yaml_char_t) '0'))
 242
 243 #define AS_HEX(string)  AS_HEX_AT((string),0)
 244
 245 /*
 246  * Check if the character is ASCII.
 247  */
 248
 249 #define IS_ASCII_AT(string,offset)                                              \
 250     ((string).pointer[offset] <= (yaml_char_t) '\x7F')
 251
 252 #define IS_ASCII(string)    IS_ASCII_AT((string),0)
 253
 254 /*
 255  * Check if the character can be printed unescaped.
 256  */
 257
 258 #define IS_PRINTABLE_AT(string,offset)                                          \
 259     (((string).pointer[offset] == 0x0A)         /* . == #x0A */                 \
 260      || ((string).pointer[offset] >= 0x20       /* #x20 <= . <= #x7E */         \
 261          && (string).pointer[offset] <= 0x7E)                                   \
 262      || ((string).pointer[offset] == 0xC2       /* #0xA0 <= . <= #xD7FF */      \
 263          && (string).pointer[offset+1] >= 0xA0)                                 \
 264      || ((string).pointer[offset] > 0xC2                                        \
 265          && (string).pointer[offset] < 0xED)                                    \
 266      || ((string).pointer[offset] == 0xED                                       \
 267          && (string).pointer[offset+1] < 0xA0)                                  \
 268      || ((string).pointer[offset] == 0xEE)                                      \
 269      || ((string).pointer[offset] == 0xEF      /* #xE000 <= . <= #xFFFD */      \
 270          && !((string).pointer[offset+1] == 0xBB        /* && . != #xFEFF */    \
 271              && (string).pointer[offset+2] == 0xBF)                             \
 272          && !((string).pointer[offset+1] == 0xBF                                \
 273              && ((string).pointer[offset+2] == 0xBE                             \
 274                  || (string).pointer[offset+2] == 0xBF))))
 275
 276 #define IS_PRINTABLE(string)    IS_PRINTABLE_AT((string),0)
 277
 278 /*
 279  * Check if the character at the specified position is NUL.
 280  */
 281
 282 #define IS_Z_AT(string,offset)    CHECK_AT((string),'\0',(offset))
 283
 284 #define IS_Z(string)    IS_Z_AT((string),0)
 285
 286 /*
 287  * Check if the character at the specified position is BOM.
 288  */
 289
 290 #define IS_BOM_AT(string,offset)                                                \
 291      (CHECK_AT((string),'\xEF',(offset))                                        \
 292       && CHECK_AT((string),'\xBB',(offset)+1)                                   \
 293       && CHECK_AT((string),'\xBF',(offset)+2))  /* BOM (#xFEFF) */
 294
 295 #define IS_BOM(string)  IS_BOM_AT(string,0)
 296
 297 /*
 298  * Check if the character at the specified position is space.
 299  */
 300
 301 #define IS_SPACE_AT(string,offset)  CHECK_AT((string),' ',(offset))
 302
 303 #define IS_SPACE(string)    IS_SPACE_AT((string),0)
 304
 305 /*
 306  * Check if the character at the specified position is tab.
 307  */
 308
 309 #define IS_TAB_AT(string,offset)    CHECK_AT((string),'\t',(offset))
 310
 311 #define IS_TAB(string)  IS_TAB_AT((string),0)
 312
 313 /*
 314  * Check if the character at the specified position is blank (space or tab).
 315  */
 316
 317 #define IS_BLANK_AT(string,offset)                                              \
 318     (IS_SPACE_AT((string),(offset)) || IS_TAB_AT((string),(offset)))
 319
 320 #define IS_BLANK(string)    IS_BLANK_AT((string),0)
 321
 322 /*
 323  * Check if the character at the specified position is a line break.
 324  */
 325
 326 #define IS_BREAK_AT(string,offset)                                              \
 327     (CHECK_AT((string),'\r',(offset))               /* CR (#xD)*/               \
 328      || CHECK_AT((string),'\n',(offset))            /* LF (#xA) */              \
 329      || (CHECK_AT((string),'\xC2',(offset))                                     \
 330          && CHECK_AT((string),'\x85',(offset)+1))   /* NEL (#x85) */            \
 331      || (CHECK_AT((string),'\xE2',(offset))                                     \
 332          && CHECK_AT((string),'\x80',(offset)+1)                                \
 333          && CHECK_AT((string),'\xA8',(offset)+2))   /* LS (#x2028) */           \
 334      || (CHECK_AT((string),'\xE2',(offset))                                     \
 335          && CHECK_AT((string),'\x80',(offset)+1)                                \
 336          && CHECK_AT((string),'\xA9',(offset)+2)))  /* PS (#x2029) */
 337
 338 #define IS_BREAK(string)    IS_BREAK_AT((string),0)
 339
 340 #define IS_CRLF_AT(string,offset)                                               \
 341      (CHECK_AT((string),'\r',(offset)) && CHECK_AT((string),'\n',(offset)+1))
 342
 343 #define IS_CRLF(string) IS_CRLF_AT((string),0)
 344
 345 /*
 346  * Check if the character is a line break or NUL.
 347  */
 348
 349 #define IS_BREAKZ_AT(string,offset)                                             \
 350     (IS_BREAK_AT((string),(offset)) || IS_Z_AT((string),(offset)))
 351
 352 #define IS_BREAKZ(string)   IS_BREAKZ_AT((string),0)
 353
 354 /*
 355  * Check if the character is a line break, space, or NUL.
 356  */
 357
 358 #define IS_SPACEZ_AT(string,offset)                                             \
 359     (IS_SPACE_AT((string),(offset)) || IS_BREAKZ_AT((string),(offset)))
 360
 361 #define IS_SPACEZ(string)   IS_SPACEZ_AT((string),0)
 362
 363 /*
 364  * Check if the character is a line break, space, tab, or NUL.
 365  */
 366
 367 #define IS_BLANKZ_AT(string,offset)                                             \
 368     (IS_BLANK_AT((string),(offset)) || IS_BREAKZ_AT((string),(offset)))
 369
 370 #define IS_BLANKZ(string)   IS_BLANKZ_AT((string),0)
 371
 372 /*
 373  * Determine the width of the character.
 374  */
 375
 376 #define WIDTH_AT(string,offset)                                                 \
 377      (((string).pointer[offset] & 0x80) == 0x00 ? 1 :                           \
 378       ((string).pointer[offset] & 0xE0) == 0xC0 ? 2 :                           \
 379       ((string).pointer[offset] & 0xF0) == 0xE0 ? 3 :                           \
 380       ((string).pointer[offset] & 0xF8) == 0xF0 ? 4 : 0)
 381
 382 #define WIDTH(string)   WIDTH_AT((string),0)
 383
 384 /*
 385  * Move the string pointer to the next character.
 386  */
 387
 388 #define MOVE(string)    ((string).pointer += WIDTH((string)))
 389
 390 /*
 391  * Copy a character and move the pointers of both strings.
 392  */
 393
 394 #define COPY(string_a,string_b)                                                 \
 395     ((*(string_b).pointer & 0x80) == 0x00 ?                                     \
 396      (*((string_a).pointer++) = *((string_b).pointer++)) :                      \
 397      (*(string_b).pointer & 0xE0) == 0xC0 ?                                     \
 398      (*((string_a).pointer++) = *((string_b).pointer++),                        \
 399       *((string_a).pointer++) = *((string_b).pointer++)) :                      \
 400      (*(string_b).pointer & 0xF0) == 0xE0 ?                                     \
 401      (*((string_a).pointer++) = *((string_b).pointer++),                        \
 402       *((string_a).pointer++) = *((string_b).pointer++),                        \
 403       *((string_a).pointer++) = *((string_b).pointer++)) :                      \
 404      (*(string_b).pointer & 0xF8) == 0xF0 ?                                     \
 405      (*((string_a).pointer++) = *((string_b).pointer++),                        \
 406       *((string_a).pointer++) = *((string_b).pointer++),                        \
 407       *((string_a).pointer++) = *((string_b).pointer++),                        \
 408       *((string_a).pointer++) = *((string_b).pointer++)) : 0)
 409
 410 /*
 411  * Stack and queue management.
 412  */
 413
 414 YAML_DECLARE(int)
 415 yaml_stack_extend(void **start, void **top, void **end);
 416
 417 YAML_DECLARE(int)
 418 yaml_queue_extend(void **start, void **head, void **tail, void **end);
 419
 420 #define STACK_INIT(context,stack,size)                                          \
 421     (((stack).start = yaml_malloc((size)*sizeof(*(stack).start))) ?             \
 422         ((stack).top = (stack).start,                                           \
 423          (stack).end = (stack).start+(size),                                    \
 424          1) :                                                                   \
 425         ((context)->error = YAML_MEMORY_ERROR,                                  \
 426          0))
 427
 428 #define STACK_DEL(context,stack)                                                \
 429     (yaml_free((stack).start),                                                  \
 430      (stack).start = (stack).top = (stack).end = 0)
 431
 432 #define STACK_EMPTY(context,stack)                                              \
 433     ((stack).start == (stack).top)
 434
 435 #define STACK_LIMIT(context,stack,size)                                         \
 436     ((stack).top - (stack).start < (size) ?                                     \
 437         1 :                                                                     \
 438         ((context)->error = YAML_MEMORY_ERROR,                                  \
 439          0))
 440
 441 #define PUSH(context,stack,value)                                               \
 442     (((stack).top != (stack).end                                                \
 443       || yaml_stack_extend((void **)&(stack).start,                             \
 444               (void **)&(stack).top, (void **)&(stack).end)) ?                  \
 445         (*((stack).top++) = value,                                              \
 446          1) :                                                                   \
 447         ((context)->error = YAML_MEMORY_ERROR,                                  \
 448          0))
 449
 450 #define POP(context,stack)                                                      \
 451     (*(--(stack).top))
 452
 453 #define QUEUE_INIT(context,queue,size)                                          \
 454     (((queue).start = yaml_malloc((size)*sizeof(*(queue).start))) ?             \
 455         ((queue).head = (queue).tail = (queue).start,                           \
 456          (queue).end = (queue).start+(size),                                    \
 457          1) :                                                                   \
 458         ((context)->error = YAML_MEMORY_ERROR,                                  \
 459          0))
 460
 461 #define QUEUE_DEL(context,queue)                                                \
 462     (yaml_free((queue).start),                                                  \
 463      (queue).start = (queue).head = (queue).tail = (queue).end = 0)
 464
 465 #define QUEUE_EMPTY(context,queue)                                              \
 466     ((queue).head == (queue).tail)
 467
 468 #define ENQUEUE(context,queue,value)                                            \
 469     (((queue).tail != (queue).end                                               \
 470       || yaml_queue_extend((void **)&(queue).start, (void **)&(queue).head,     \
 471             (void **)&(queue).tail, (void **)&(queue).end)) ?                   \
 472         (*((queue).tail++) = value,                                             \
 473          1) :                                                                   \
 474         ((context)->error = YAML_MEMORY_ERROR,                                  \
 475          0))
 476
 477 #define DEQUEUE(context,queue)                                                  \
 478     (*((queue).head++))
 479
 480 #define QUEUE_INSERT(context,queue,index,value)                                 \
 481     (((queue).tail != (queue).end                                               \
 482       || yaml_queue_extend((void **)&(queue).start, (void **)&(queue).head,     \
 483             (void **)&(queue).tail, (void **)&(queue).end)) ?                   \
 484         (memmove((queue).head+(index)+1,(queue).head+(index),                   \
 485             ((queue).tail-(queue).head-(index))*sizeof(*(queue).start)),        \
 486          *((queue).head+(index)) = value,                                       \
 487          (queue).tail++,                                                        \
 488          1) :                                                                   \
 489         ((context)->error = YAML_MEMORY_ERROR,                                  \
 490          0))
 491
 492 /*
 493  * Token initializers.
 494  */
 495
 496 #define TOKEN_INIT(token,token_type,token_start_mark,token_end_mark)            \
 497     (memset(&(token), 0, sizeof(yaml_token_t)),                                 \
 498      (token).type = (token_type),                                               \
 499      (token).start_mark = (token_start_mark),                                   \
 500      (token).end_mark = (token_end_mark))
 501
 502 #define STREAM_START_TOKEN_INIT(token,token_encoding,start_mark,end_mark)       \
 503     (TOKEN_INIT((token),YAML_STREAM_START_TOKEN,(start_mark),(end_mark)),       \
 504      (token).data.stream_start.encoding = (token_encoding))
 505
 506 #define STREAM_END_TOKEN_INIT(token,start_mark,end_mark)                        \
 507     (TOKEN_INIT((token),YAML_STREAM_END_TOKEN,(start_mark),(end_mark)))
 508
 509 #define ALIAS_TOKEN_INIT(token,token_value,start_mark,end_mark)                 \
 510     (TOKEN_INIT((token),YAML_ALIAS_TOKEN,(start_mark),(end_mark)),              \
 511      (token).data.alias.value = (token_value))
 512
 513 #define ANCHOR_TOKEN_INIT(token,token_value,start_mark,end_mark)                \
 514     (TOKEN_INIT((token),YAML_ANCHOR_TOKEN,(start_mark),(end_mark)),             \
 515      (token).data.anchor.value = (token_value))
 516
 517 #define TAG_TOKEN_INIT(token,token_handle,token_suffix,start_mark,end_mark)     \
 518     (TOKEN_INIT((token),YAML_TAG_TOKEN,(start_mark),(end_mark)),                \
 519      (token).data.tag.handle = (token_handle),                                  \
 520      (token).data.tag.suffix = (token_suffix))
 521
 522 #define SCALAR_TOKEN_INIT(token,token_value,token_length,token_style,start_mark,end_mark)   \
 523     (TOKEN_INIT((token),YAML_SCALAR_TOKEN,(start_mark),(end_mark)),             \
 524      (token).data.scalar.value = (token_value),                                 \
 525      (token).data.scalar.length = (token_length),                               \
 526      (token).data.scalar.style = (token_style))
 527
 528 #define VERSION_DIRECTIVE_TOKEN_INIT(token,token_major,token_minor,start_mark,end_mark)     \
 529     (TOKEN_INIT((token),YAML_VERSION_DIRECTIVE_TOKEN,(start_mark),(end_mark)),  \
 530      (token).data.version_directive.major = (token_major),                      \
 531      (token).data.version_directive.minor = (token_minor))
 532
 533 #define TAG_DIRECTIVE_TOKEN_INIT(token,token_handle,token_prefix,start_mark,end_mark)       \
 534     (TOKEN_INIT((token),YAML_TAG_DIRECTIVE_TOKEN,(start_mark),(end_mark)),      \
 535      (token).data.tag_directive.handle = (token_handle),                        \
 536      (token).data.tag_directive.prefix = (token_prefix))
 537
 538 /*
 539  * Event initializers.
 540  */
 541
 542 #define EVENT_INIT(event,event_type,event_start_mark,event_end_mark)            \
 543     (memset(&(event), 0, sizeof(yaml_event_t)),                                 \
 544      (event).type = (event_type),                                               \
 545      (event).start_mark = (event_start_mark),                                   \
 546      (event).end_mark = (event_end_mark))
 547
 548 #define STREAM_START_EVENT_INIT(event,event_encoding,start_mark,end_mark)       \
 549     (EVENT_INIT((event),YAML_STREAM_START_EVENT,(start_mark),(end_mark)),       \
 550      (event).data.stream_start.encoding = (event_encoding))
 551
 552 #define STREAM_END_EVENT_INIT(event,start_mark,end_mark)                        \
 553     (EVENT_INIT((event),YAML_STREAM_END_EVENT,(start_mark),(end_mark)))
 554
 555 #define DOCUMENT_START_EVENT_INIT(event,event_version_directive,                \
 556         event_tag_directives_start,event_tag_directives_end,event_implicit,start_mark,end_mark) \
 557     (EVENT_INIT((event),YAML_DOCUMENT_START_EVENT,(start_mark),(end_mark)),     \
 558      (event).data.document_start.version_directive = (event_version_directive), \
 559      (event).data.document_start.tag_directives.start = (event_tag_directives_start),   \
 560      (event).data.document_start.tag_directives.end = (event_tag_directives_end),   \
 561      (event).data.document_start.implicit = (event_implicit))
 562
 563 #define DOCUMENT_END_EVENT_INIT(event,event_implicit,start_mark,end_mark)       \
 564     (EVENT_INIT((event),YAML_DOCUMENT_END_EVENT,(start_mark),(end_mark)),       \
 565      (event).data.document_end.implicit = (event_implicit))
 566
 567 #define ALIAS_EVENT_INIT(event,event_anchor,start_mark,end_mark)                \
 568     (EVENT_INIT((event),YAML_ALIAS_EVENT,(start_mark),(end_mark)),              \
 569      (event).data.alias.anchor = (event_anchor))
 570
 571 #define SCALAR_EVENT_INIT(event,event_anchor,event_tag,event_value,event_length,    \
 572         event_plain_implicit, event_quoted_implicit,event_style,start_mark,end_mark)    \
 573     (EVENT_INIT((event),YAML_SCALAR_EVENT,(start_mark),(end_mark)),             \
 574      (event).data.scalar.anchor = (event_anchor),                               \
 575      (event).data.scalar.tag = (event_tag),                                     \
 576      (event).data.scalar.value = (event_value),                                 \
 577      (event).data.scalar.length = (event_length),                               \
 578      (event).data.scalar.plain_implicit = (event_plain_implicit),               \
 579      (event).data.scalar.quoted_implicit = (event_quoted_implicit),             \
 580      (event).data.scalar.style = (event_style))
 581
 582 #define SEQUENCE_START_EVENT_INIT(event,event_anchor,event_tag,                 \
 583         event_implicit,event_style,start_mark,end_mark)                         \
 584     (EVENT_INIT((event),YAML_SEQUENCE_START_EVENT,(start_mark),(end_mark)),     \
 585      (event).data.sequence_start.anchor = (event_anchor),                       \
 586      (event).data.sequence_start.tag = (event_tag),                             \
 587      (event).data.sequence_start.implicit = (event_implicit),                   \
 588      (event).data.sequence_start.style = (event_style))
 589
 590 #define SEQUENCE_END_EVENT_INIT(event,start_mark,end_mark)                      \
 591     (EVENT_INIT((event),YAML_SEQUENCE_END_EVENT,(start_mark),(end_mark)))
 592
 593 #define MAPPING_START_EVENT_INIT(event,event_anchor,event_tag,                  \
 594         event_implicit,event_style,start_mark,end_mark)                         \
 595     (EVENT_INIT((event),YAML_MAPPING_START_EVENT,(start_mark),(end_mark)),      \
 596      (event).data.mapping_start.anchor = (event_anchor),                        \
 597      (event).data.mapping_start.tag = (event_tag),                              \
 598      (event).data.mapping_start.implicit = (event_implicit),                    \
 599      (event).data.mapping_start.style = (event_style))
 600
 601 #define MAPPING_END_EVENT_INIT(event,start_mark,end_mark)                       \
 602     (EVENT_INIT((event),YAML_MAPPING_END_EVENT,(start_mark),(end_mark)))
 603
 604 /*
 605  * Document initializer.
 606  */
 607
 608 #define DOCUMENT_INIT(document,document_nodes_start,document_nodes_end,         \
 609         document_version_directive,document_tag_directives_start,               \
 610         document_tag_directives_end,document_start_implicit,                    \
 611         document_end_implicit,document_start_mark,document_end_mark)            \
 612     (memset(&(document), 0, sizeof(yaml_document_t)),                           \
 613      (document).nodes.start = (document_nodes_start),                           \
 614      (document).nodes.end = (document_nodes_end),                               \
 615      (document).nodes.top = (document_nodes_start),                             \
 616      (document).version_directive = (document_version_directive),               \
 617      (document).tag_directives.start = (document_tag_directives_start),         \
 618      (document).tag_directives.end = (document_tag_directives_end),             \
 619      (document).start_implicit = (document_start_implicit),                     \
 620      (document).end_implicit = (document_end_implicit),                         \
 621      (document).start_mark = (document_start_mark),                             \
 622      (document).end_mark = (document_end_mark))
 623
 624 /*
 625  * Node initializers.
 626  */
 627
 628 #define NODE_INIT(node,node_type,node_tag,node_start_mark,node_end_mark)        \
 629     (memset(&(node), 0, sizeof(yaml_node_t)),                                   \
 630      (node).type = (node_type),                                                 \
 631      (node).tag = (node_tag),                                                   \
 632      (node).start_mark = (node_start_mark),                                     \
 633      (node).end_mark = (node_end_mark))
 634
 635 #define SCALAR_NODE_INIT(node,node_tag,node_value,node_length,                  \
 636         node_style,start_mark,end_mark)                                         \
 637     (NODE_INIT((node),YAML_SCALAR_NODE,(node_tag),(start_mark),(end_mark)),     \
 638      (node).data.scalar.value = (node_value),                                   \
 639      (node).data.scalar.length = (node_length),                                 \
 640      (node).data.scalar.style = (node_style))
 641
 642 #define SEQUENCE_NODE_INIT(node,node_tag,node_items_start,node_items_end,       \
 643         node_style,start_mark,end_mark)                                         \
 644     (NODE_INIT((node),YAML_SEQUENCE_NODE,(node_tag),(start_mark),(end_mark)),   \
 645      (node).data.sequence.items.start = (node_items_start),                     \
 646      (node).data.sequence.items.end = (node_items_end),                         \
 647      (node).data.sequence.items.top = (node_items_start),                       \
 648      (node).data.sequence.style = (node_style))
 649
 650 #define MAPPING_NODE_INIT(node,node_tag,node_pairs_start,node_pairs_end,        \
 651         node_style,start_mark,end_mark)                                         \
 652     (NODE_INIT((node),YAML_MAPPING_NODE,(node_tag),(start_mark),(end_mark)),    \
 653      (node).data.mapping.pairs.start = (node_pairs_start),                      \
 654      (node).data.mapping.pairs.end = (node_pairs_end),                          \
 655      (node).data.mapping.pairs.top = (node_pairs_start),                        \
 656      (node).data.mapping.style = (node_style))
 657