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