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