src/yaml_private.h

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