| 1 | /* |
| 2 | * Copyright (c) 2009-2016 Petri Lehtinen <petri@digip.org> |
| 3 | * Copyright (c) 2011-2012 Graeme Smecher <graeme.smecher@mail.mcgill.ca> |
| 4 | * |
| 5 | * Jansson is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the MIT license. See LICENSE for details. |
| 7 | */ |
| 8 | |
| 9 | #include <string.h> |
| 10 | #include "jansson.h" |
| 11 | #include "jansson_private.h" |
| 12 | #include "utf.h" |
| 13 | |
| 14 | typedef struct { |
| 15 | int line; |
| 16 | int column; |
| 17 | size_t pos; |
| 18 | char token; |
| 19 | } token_t; |
| 20 | |
| 21 | typedef struct { |
| 22 | const char *start; |
| 23 | const char *fmt; |
| 24 | token_t prev_token; |
| 25 | token_t token; |
| 26 | token_t next_token; |
| 27 | json_error_t *error; |
| 28 | size_t flags; |
| 29 | int line; |
| 30 | int column; |
| 31 | size_t pos; |
| 32 | int has_error; |
| 33 | } scanner_t; |
| 34 | |
| 35 | #define token(scanner) ((scanner)->token.token) |
| 36 | |
| 37 | static const char * const type_names[] = { |
| 38 | "object", |
| 39 | "array", |
| 40 | "string", |
| 41 | "integer", |
| 42 | "real", |
| 43 | "true", |
| 44 | "false", |
| 45 | "null" |
| 46 | }; |
| 47 | |
| 48 | #define type_name(x) type_names[json_typeof(x)] |
| 49 | |
| 50 | static const char unpack_value_starters[] = "{[siIbfFOon"; |
| 51 | |
| 52 | static void scanner_init(scanner_t *s, json_error_t *error, |
| 53 | size_t flags, const char *fmt) |
| 54 | { |
| 55 | s->error = error; |
| 56 | s->flags = flags; |
| 57 | s->fmt = s->start = fmt; |
| 58 | memset(&s->prev_token, 0, sizeof(token_t)); |
| 59 | memset(&s->token, 0, sizeof(token_t)); |
| 60 | memset(&s->next_token, 0, sizeof(token_t)); |
| 61 | s->line = 1; |
| 62 | s->column = 0; |
| 63 | s->pos = 0; |
| 64 | s->has_error = 0; |
| 65 | } |
| 66 | |
| 67 | static void next_token(scanner_t *s) |
| 68 | { |
| 69 | const char *t; |
| 70 | s->prev_token = s->token; |
| 71 | |
| 72 | if(s->next_token.line) { |
| 73 | s->token = s->next_token; |
| 74 | s->next_token.line = 0; |
| 75 | return; |
| 76 | } |
| 77 | |
| 78 | if (!token(s) && !*s->fmt) |
| 79 | return; |
| 80 | |
| 81 | t = s->fmt; |
| 82 | s->column++; |
| 83 | s->pos++; |
| 84 | |
| 85 | /* skip space and ignored chars */ |
| 86 | while(*t == ' ' || *t == '\t' || *t == '\n' || *t == ',' || *t == ':') { |
| 87 | if(*t == '\n') { |
| 88 | s->line++; |
| 89 | s->column = 1; |
| 90 | } |
| 91 | else |
| 92 | s->column++; |
| 93 | |
| 94 | s->pos++; |
| 95 | t++; |
| 96 | } |
| 97 | |
| 98 | s->token.token = *t; |
| 99 | s->token.line = s->line; |
| 100 | s->token.column = s->column; |
| 101 | s->token.pos = s->pos; |
| 102 | |
| 103 | if (*t) t++; |
| 104 | s->fmt = t; |
| 105 | } |
| 106 | |
| 107 | static void prev_token(scanner_t *s) |
| 108 | { |
| 109 | s->next_token = s->token; |
| 110 | s->token = s->prev_token; |
| 111 | } |
| 112 | |
| 113 | static void set_error(scanner_t *s, const char *source, enum json_error_code code, |
| 114 | const char *fmt, ...) |
| 115 | { |
| 116 | va_list ap; |
| 117 | va_start(ap, fmt); |
| 118 | |
| 119 | jsonp_error_vset(s->error, s->token.line, s->token.column, s->token.pos, |
| 120 | code, fmt, ap); |
| 121 | |
| 122 | jsonp_error_set_source(s->error, source); |
| 123 | |
| 124 | va_end(ap); |
| 125 | } |
| 126 | |
| 127 | static json_t *pack(scanner_t *s, va_list *ap); |
| 128 | |
| 129 | |
| 130 | /* ours will be set to 1 if jsonp_free() must be called for the result |
| 131 | afterwards */ |
| 132 | static char *read_string(scanner_t *s, va_list *ap, |
| 133 | const char *purpose, size_t *out_len, int *ours, int optional) |
| 134 | { |
| 135 | char t; |
| 136 | strbuffer_t strbuff; |
| 137 | const char *str; |
| 138 | size_t length; |
| 139 | |
| 140 | next_token(s); |
| 141 | t = token(s); |
| 142 | prev_token(s); |
| 143 | |
| 144 | *ours = 0; |
| 145 | if(t != '#' && t != '%' && t != '+') { |
| 146 | /* Optimize the simple case */ |
| 147 | str = va_arg(*ap, const char *); |
| 148 | |
| 149 | if(!str) { |
| 150 | if (!optional) { |
| 151 | set_error(s, "<args>", json_error_null_value, "NULL %s", purpose); |
| 152 | s->has_error = 1; |
| 153 | } |
| 154 | return NULL; |
| 155 | } |
| 156 | |
| 157 | length = strlen(str); |
| 158 | |
| 159 | if(!utf8_check_string(str, length)) { |
| 160 | set_error(s, "<args>", json_error_invalid_utf8, "Invalid UTF-8 %s", purpose); |
| 161 | s->has_error = 1; |
| 162 | return NULL; |
| 163 | } |
| 164 | |
| 165 | *out_len = length; |
| 166 | return (char *)str; |
| 167 | } else if (optional) { |
| 168 | set_error(s, "<format>", json_error_invalid_format, "Cannot use '%c' on optional strings", t); |
| 169 | s->has_error = 1; |
| 170 | |
| 171 | return NULL; |
| 172 | } |
| 173 | |
| 174 | if(strbuffer_init(&strbuff)) { |
| 175 | set_error(s, "<internal>", json_error_out_of_memory, "Out of memory"); |
| 176 | s->has_error = 1; |
| 177 | } |
| 178 | |
| 179 | while(1) { |
| 180 | str = va_arg(*ap, const char *); |
| 181 | if(!str) { |
| 182 | set_error(s, "<args>", json_error_null_value, "NULL %s", purpose); |
| 183 | s->has_error = 1; |
| 184 | } |
| 185 | |
| 186 | next_token(s); |
| 187 | |
| 188 | if(token(s) == '#') { |
| 189 | length = va_arg(*ap, int); |
| 190 | } |
| 191 | else if(token(s) == '%') { |
| 192 | length = va_arg(*ap, size_t); |
| 193 | } |
| 194 | else { |
| 195 | prev_token(s); |
| 196 | length = s->has_error ? 0 : strlen(str); |
| 197 | } |
| 198 | |
| 199 | if(!s->has_error && strbuffer_append_bytes(&strbuff, str, length) == -1) { |
| 200 | set_error(s, "<internal>", json_error_out_of_memory, "Out of memory"); |
| 201 | s->has_error = 1; |
| 202 | } |
| 203 | |
| 204 | next_token(s); |
| 205 | if(token(s) != '+') { |
| 206 | prev_token(s); |
| 207 | break; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | if(s->has_error) { |
| 212 | strbuffer_close(&strbuff); |
| 213 | return NULL; |
| 214 | } |
| 215 | |
| 216 | if(!utf8_check_string(strbuff.value, strbuff.length)) { |
| 217 | set_error(s, "<args>", json_error_invalid_utf8, "Invalid UTF-8 %s", purpose); |
| 218 | strbuffer_close(&strbuff); |
| 219 | s->has_error = 1; |
| 220 | return NULL; |
| 221 | } |
| 222 | |
| 223 | *out_len = strbuff.length; |
| 224 | *ours = 1; |
| 225 | return strbuffer_steal_value(&strbuff); |
| 226 | } |
| 227 | |
| 228 | static json_t *pack_object(scanner_t *s, va_list *ap) |
| 229 | { |
| 230 | json_t *object = json_object(); |
| 231 | next_token(s); |
| 232 | |
| 233 | while(token(s) != '}') { |
| 234 | char *key; |
| 235 | size_t len; |
| 236 | int ours; |
| 237 | json_t *value; |
| 238 | char valueOptional; |
| 239 | |
| 240 | if(!token(s)) { |
| 241 | set_error(s, "<format>", json_error_invalid_format, "Unexpected end of format string"); |
| 242 | goto error; |
| 243 | } |
| 244 | |
| 245 | if(token(s) != 's') { |
| 246 | set_error(s, "<format>", json_error_invalid_format, "Expected format 's', got '%c'", token(s)); |
| 247 | goto error; |
| 248 | } |
| 249 | |
| 250 | key = read_string(s, ap, "object key", &len, &ours, 0); |
| 251 | |
| 252 | next_token(s); |
| 253 | |
| 254 | next_token(s); |
| 255 | valueOptional = token(s); |
| 256 | prev_token(s); |
| 257 | |
| 258 | value = pack(s, ap); |
| 259 | if(!value) { |
| 260 | if(ours) |
| 261 | jsonp_free(key); |
| 262 | |
| 263 | if(valueOptional != '*') { |
| 264 | set_error(s, "<args>", json_error_null_value, "NULL object value"); |
| 265 | s->has_error = 1; |
| 266 | } |
| 267 | |
| 268 | next_token(s); |
| 269 | continue; |
| 270 | } |
| 271 | |
| 272 | if(s->has_error) |
| 273 | json_decref(value); |
| 274 | |
| 275 | if(!s->has_error && json_object_set_new_nocheck(object, key, value)) { |
| 276 | set_error(s, "<internal>", json_error_out_of_memory, "Unable to add key \"%s\"", key); |
| 277 | s->has_error = 1; |
| 278 | } |
| 279 | |
| 280 | if(ours) |
| 281 | jsonp_free(key); |
| 282 | |
| 283 | next_token(s); |
| 284 | } |
| 285 | |
| 286 | if(!s->has_error) |
| 287 | return object; |
| 288 | |
| 289 | error: |
| 290 | json_decref(object); |
| 291 | return NULL; |
| 292 | } |
| 293 | |
| 294 | static json_t *pack_array(scanner_t *s, va_list *ap) |
| 295 | { |
| 296 | json_t *array = json_array(); |
| 297 | next_token(s); |
| 298 | |
| 299 | while(token(s) != ']') { |
| 300 | json_t *value; |
| 301 | char valueOptional; |
| 302 | |
| 303 | if(!token(s)) { |
| 304 | set_error(s, "<format>", json_error_invalid_format, "Unexpected end of format string"); |
| 305 | /* Format string errors are unrecoverable. */ |
| 306 | goto error; |
| 307 | } |
| 308 | |
| 309 | next_token(s); |
| 310 | valueOptional = token(s); |
| 311 | prev_token(s); |
| 312 | |
| 313 | value = pack(s, ap); |
| 314 | if(!value) { |
| 315 | if(valueOptional != '*') { |
| 316 | s->has_error = 1; |
| 317 | } |
| 318 | |
| 319 | next_token(s); |
| 320 | continue; |
| 321 | } |
| 322 | |
| 323 | if(s->has_error) |
| 324 | json_decref(value); |
| 325 | |
| 326 | if(!s->has_error && json_array_append_new(array, value)) { |
| 327 | set_error(s, "<internal>", json_error_out_of_memory, "Unable to append to array"); |
| 328 | s->has_error = 1; |
| 329 | } |
| 330 | |
| 331 | next_token(s); |
| 332 | } |
| 333 | |
| 334 | if(!s->has_error) |
| 335 | return array; |
| 336 | |
| 337 | error: |
| 338 | json_decref(array); |
| 339 | return NULL; |
| 340 | } |
| 341 | |
| 342 | static json_t *pack_string(scanner_t *s, va_list *ap) |
| 343 | { |
| 344 | char *str; |
| 345 | char t; |
| 346 | size_t len; |
| 347 | int ours; |
| 348 | int optional; |
| 349 | |
| 350 | next_token(s); |
| 351 | t = token(s); |
| 352 | optional = t == '?' || t == '*'; |
| 353 | if (!optional) |
| 354 | prev_token(s); |
| 355 | |
| 356 | str = read_string(s, ap, "string", &len, &ours, optional); |
| 357 | |
| 358 | if (!str) |
| 359 | return t == '?' && !s->has_error ? json_null() : NULL; |
| 360 | |
| 361 | if (s->has_error) { |
| 362 | /* It's impossible to reach this point if ours != 0, do not free str. */ |
| 363 | return NULL; |
| 364 | } |
| 365 | |
| 366 | if (ours) |
| 367 | return jsonp_stringn_nocheck_own(str, len); |
| 368 | |
| 369 | return json_stringn_nocheck(str, len); |
| 370 | } |
| 371 | |
| 372 | static json_t *pack_object_inter(scanner_t *s, va_list *ap, int need_incref) |
| 373 | { |
| 374 | json_t *json; |
| 375 | char ntoken; |
| 376 | |
| 377 | next_token(s); |
| 378 | ntoken = token(s); |
| 379 | |
| 380 | if (ntoken != '?' && ntoken != '*') |
| 381 | prev_token(s); |
| 382 | |
| 383 | json = va_arg(*ap, json_t *); |
| 384 | |
| 385 | if (json) |
| 386 | return need_incref ? json_incref(json) : json; |
| 387 | |
| 388 | switch (ntoken) { |
| 389 | case '?': |
| 390 | return json_null(); |
| 391 | case '*': |
| 392 | return NULL; |
| 393 | default: |
| 394 | break; |
| 395 | } |
| 396 | |
| 397 | set_error(s, "<args>", json_error_null_value, "NULL object"); |
| 398 | s->has_error = 1; |
| 399 | return NULL; |
| 400 | } |
| 401 | |
| 402 | static json_t *pack_integer(scanner_t *s, json_int_t value) |
| 403 | { |
| 404 | json_t *json = json_integer(value); |
| 405 | |
| 406 | if (!json) { |
| 407 | set_error(s, "<internal>", json_error_out_of_memory, "Out of memory"); |
| 408 | s->has_error = 1; |
| 409 | } |
| 410 | |
| 411 | return json; |
| 412 | } |
| 413 | |
| 414 | static json_t *pack_real(scanner_t *s, double value) |
| 415 | { |
| 416 | /* Allocate without setting value so we can identify OOM error. */ |
| 417 | json_t *json = json_real(0.0); |
| 418 | |
| 419 | if (!json) { |
| 420 | set_error(s, "<internal>", json_error_out_of_memory, "Out of memory"); |
| 421 | s->has_error = 1; |
| 422 | |
| 423 | return NULL; |
| 424 | } |
| 425 | |
| 426 | if (json_real_set(json, value)) { |
| 427 | json_decref(json); |
| 428 | |
| 429 | set_error(s, "<args>", json_error_numeric_overflow, "Invalid floating point value"); |
| 430 | s->has_error = 1; |
| 431 | |
| 432 | return NULL; |
| 433 | } |
| 434 | |
| 435 | return json; |
| 436 | } |
| 437 | |
| 438 | static json_t *pack(scanner_t *s, va_list *ap) |
| 439 | { |
| 440 | switch(token(s)) { |
| 441 | case '{': |
| 442 | return pack_object(s, ap); |
| 443 | |
| 444 | case '[': |
| 445 | return pack_array(s, ap); |
| 446 | |
| 447 | case 's': /* string */ |
| 448 | return pack_string(s, ap); |
| 449 | |
| 450 | case 'n': /* null */ |
| 451 | return json_null(); |
| 452 | |
| 453 | case 'b': /* boolean */ |
| 454 | return va_arg(*ap, int) ? json_true() : json_false(); |
| 455 | |
| 456 | case 'i': /* integer from int */ |
| 457 | return pack_integer(s, va_arg(*ap, int)); |
| 458 | |
| 459 | case 'I': /* integer from json_int_t */ |
| 460 | return pack_integer(s, va_arg(*ap, json_int_t)); |
| 461 | |
| 462 | case 'f': /* real */ |
| 463 | return pack_real(s, va_arg(*ap, double)); |
| 464 | |
| 465 | case 'O': /* a json_t object; increments refcount */ |
| 466 | return pack_object_inter(s, ap, 1); |
| 467 | |
| 468 | case 'o': /* a json_t object; doesn't increment refcount */ |
| 469 | return pack_object_inter(s, ap, 0); |
| 470 | |
| 471 | default: |
| 472 | set_error(s, "<format>", json_error_invalid_format, "Unexpected format character '%c'", |
| 473 | token(s)); |
| 474 | s->has_error = 1; |
| 475 | return NULL; |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | static int unpack(scanner_t *s, json_t *root, va_list *ap); |
| 480 | |
| 481 | static int unpack_object(scanner_t *s, json_t *root, va_list *ap) |
| 482 | { |
| 483 | int ret = -1; |
| 484 | int strict = 0; |
| 485 | int gotopt = 0; |
| 486 | |
| 487 | /* Use a set (emulated by a hashtable) to check that all object |
| 488 | keys are accessed. Checking that the correct number of keys |
| 489 | were accessed is not enough, as the same key can be unpacked |
| 490 | multiple times. |
| 491 | */ |
| 492 | hashtable_t key_set; |
| 493 | |
| 494 | if(hashtable_init(&key_set)) { |
| 495 | set_error(s, "<internal>", json_error_out_of_memory, "Out of memory"); |
| 496 | return -1; |
| 497 | } |
| 498 | |
| 499 | if(root && !json_is_object(root)) { |
| 500 | set_error(s, "<validation>", json_error_wrong_type, "Expected object, got %s", |
| 501 | type_name(root)); |
| 502 | goto out; |
| 503 | } |
| 504 | next_token(s); |
| 505 | |
| 506 | while(token(s) != '}') { |
| 507 | const char *key; |
| 508 | json_t *value; |
| 509 | int opt = 0; |
| 510 | |
| 511 | if(strict != 0) { |
| 512 | set_error(s, "<format>", json_error_invalid_format, "Expected '}' after '%c', got '%c'", |
| 513 | (strict == 1 ? '!' : '*'), token(s)); |
| 514 | goto out; |
| 515 | } |
| 516 | |
| 517 | if(!token(s)) { |
| 518 | set_error(s, "<format>", json_error_invalid_format, "Unexpected end of format string"); |
| 519 | goto out; |
| 520 | } |
| 521 | |
| 522 | if(token(s) == '!' || token(s) == '*') { |
| 523 | strict = (token(s) == '!' ? 1 : -1); |
| 524 | next_token(s); |
| 525 | continue; |
| 526 | } |
| 527 | |
| 528 | if(token(s) != 's') { |
| 529 | set_error(s, "<format>", json_error_invalid_format, "Expected format 's', got '%c'", token(s)); |
| 530 | goto out; |
| 531 | } |
| 532 | |
| 533 | key = va_arg(*ap, const char *); |
| 534 | if(!key) { |
| 535 | set_error(s, "<args>", json_error_null_value, "NULL object key"); |
| 536 | goto out; |
| 537 | } |
| 538 | |
| 539 | next_token(s); |
| 540 | |
| 541 | if(token(s) == '?') { |
| 542 | opt = gotopt = 1; |
| 543 | next_token(s); |
| 544 | } |
| 545 | |
| 546 | if(!root) { |
| 547 | /* skipping */ |
| 548 | value = NULL; |
| 549 | } |
| 550 | else { |
| 551 | value = json_object_get(root, key); |
| 552 | if(!value && !opt) { |
| 553 | set_error(s, "<validation>", json_error_item_not_found, "Object item not found: %s", key); |
| 554 | goto out; |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | if(unpack(s, value, ap)) |
| 559 | goto out; |
| 560 | |
| 561 | hashtable_set(&key_set, key, json_null()); |
| 562 | next_token(s); |
| 563 | } |
| 564 | |
| 565 | if(strict == 0 && (s->flags & JSON_STRICT)) |
| 566 | strict = 1; |
| 567 | |
| 568 | if(root && strict == 1) { |
| 569 | /* We need to check that all non optional items have been parsed */ |
| 570 | const char *key; |
| 571 | /* keys_res is 1 for uninitialized, 0 for success, -1 for error. */ |
| 572 | int keys_res = 1; |
| 573 | strbuffer_t unrecognized_keys; |
| 574 | json_t *value; |
| 575 | long unpacked = 0; |
| 576 | |
| 577 | if (gotopt || json_object_size(root) != key_set.size) { |
| 578 | json_object_foreach(root, key, value) { |
| 579 | if(!hashtable_get(&key_set, key)) { |
| 580 | unpacked++; |
| 581 | |
| 582 | /* Save unrecognized keys for the error message */ |
| 583 | if (keys_res == 1) { |
| 584 | keys_res = strbuffer_init(&unrecognized_keys); |
| 585 | } else if (!keys_res) { |
| 586 | keys_res = strbuffer_append_bytes(&unrecognized_keys, ", ", 2); |
| 587 | } |
| 588 | |
| 589 | if (!keys_res) |
| 590 | keys_res = strbuffer_append_bytes(&unrecognized_keys, key, strlen(key)); |
| 591 | } |
| 592 | } |
| 593 | } |
| 594 | if (unpacked) { |
| 595 | set_error(s, "<validation>", json_error_end_of_input_expected, |
| 596 | "%li object item(s) left unpacked: %s", |
| 597 | unpacked, |
| 598 | keys_res ? "<unknown>" : strbuffer_value(&unrecognized_keys)); |
| 599 | strbuffer_close(&unrecognized_keys); |
| 600 | goto out; |
| 601 | } |
| 602 | } |
| 603 | |
| 604 | ret = 0; |
| 605 | |
| 606 | out: |
| 607 | hashtable_close(&key_set); |
| 608 | return ret; |
| 609 | } |
| 610 | |
| 611 | static int unpack_array(scanner_t *s, json_t *root, va_list *ap) |
| 612 | { |
| 613 | size_t i = 0; |
| 614 | int strict = 0; |
| 615 | |
| 616 | if(root && !json_is_array(root)) { |
| 617 | set_error(s, "<validation>", json_error_wrong_type, "Expected array, got %s", type_name(root)); |
| 618 | return -1; |
| 619 | } |
| 620 | next_token(s); |
| 621 | |
| 622 | while(token(s) != ']') { |
| 623 | json_t *value; |
| 624 | |
| 625 | if(strict != 0) { |
| 626 | set_error(s, "<format>", json_error_invalid_format, "Expected ']' after '%c', got '%c'", |
| 627 | (strict == 1 ? '!' : '*'), |
| 628 | token(s)); |
| 629 | return -1; |
| 630 | } |
| 631 | |
| 632 | if(!token(s)) { |
| 633 | set_error(s, "<format>", json_error_invalid_format, "Unexpected end of format string"); |
| 634 | return -1; |
| 635 | } |
| 636 | |
| 637 | if(token(s) == '!' || token(s) == '*') { |
| 638 | strict = (token(s) == '!' ? 1 : -1); |
| 639 | next_token(s); |
| 640 | continue; |
| 641 | } |
| 642 | |
| 643 | if(!strchr(unpack_value_starters, token(s))) { |
| 644 | set_error(s, "<format>", json_error_invalid_format, "Unexpected format character '%c'", |
| 645 | token(s)); |
| 646 | return -1; |
| 647 | } |
| 648 | |
| 649 | if(!root) { |
| 650 | /* skipping */ |
| 651 | value = NULL; |
| 652 | } |
| 653 | else { |
| 654 | value = json_array_get(root, i); |
| 655 | if(!value) { |
| 656 | set_error(s, "<validation>", json_error_index_out_of_range, "Array index %lu out of range", |
| 657 | (unsigned long)i); |
| 658 | return -1; |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | if(unpack(s, value, ap)) |
| 663 | return -1; |
| 664 | |
| 665 | next_token(s); |
| 666 | i++; |
| 667 | } |
| 668 | |
| 669 | if(strict == 0 && (s->flags & JSON_STRICT)) |
| 670 | strict = 1; |
| 671 | |
| 672 | if(root && strict == 1 && i != json_array_size(root)) { |
| 673 | long diff = (long)json_array_size(root) - (long)i; |
| 674 | set_error(s, "<validation>", json_error_end_of_input_expected, "%li array item(s) left unpacked", diff); |
| 675 | return -1; |
| 676 | } |
| 677 | |
| 678 | return 0; |
| 679 | } |
| 680 | |
| 681 | static int unpack(scanner_t *s, json_t *root, va_list *ap) |
| 682 | { |
| 683 | switch(token(s)) |
| 684 | { |
| 685 | case '{': |
| 686 | return unpack_object(s, root, ap); |
| 687 | |
| 688 | case '[': |
| 689 | return unpack_array(s, root, ap); |
| 690 | |
| 691 | case 's': |
| 692 | if(root && !json_is_string(root)) { |
| 693 | set_error(s, "<validation>", json_error_wrong_type, "Expected string, got %s", |
| 694 | type_name(root)); |
| 695 | return -1; |
| 696 | } |
| 697 | |
| 698 | if(!(s->flags & JSON_VALIDATE_ONLY)) { |
| 699 | const char **str_target; |
| 700 | size_t *len_target = NULL; |
| 701 | |
| 702 | str_target = va_arg(*ap, const char **); |
| 703 | if(!str_target) { |
| 704 | set_error(s, "<args>", json_error_null_value, "NULL string argument"); |
| 705 | return -1; |
| 706 | } |
| 707 | |
| 708 | next_token(s); |
| 709 | |
| 710 | if(token(s) == '%') { |
| 711 | len_target = va_arg(*ap, size_t *); |
| 712 | if(!len_target) { |
| 713 | set_error(s, "<args>", json_error_null_value, "NULL string length argument"); |
| 714 | return -1; |
| 715 | } |
| 716 | } |
| 717 | else |
| 718 | prev_token(s); |
| 719 | |
| 720 | if(root) { |
| 721 | *str_target = json_string_value(root); |
| 722 | if(len_target) |
| 723 | *len_target = json_string_length(root); |
| 724 | } |
| 725 | } |
| 726 | return 0; |
| 727 | |
| 728 | case 'i': |
| 729 | if(root && !json_is_integer(root)) { |
| 730 | set_error(s, "<validation>", json_error_wrong_type, "Expected integer, got %s", |
| 731 | type_name(root)); |
| 732 | return -1; |
| 733 | } |
| 734 | |
| 735 | if(!(s->flags & JSON_VALIDATE_ONLY)) { |
| 736 | int *target = va_arg(*ap, int*); |
| 737 | if(root) |
| 738 | *target = (int)json_integer_value(root); |
| 739 | } |
| 740 | |
| 741 | return 0; |
| 742 | |
| 743 | case 'I': |
| 744 | if(root && !json_is_integer(root)) { |
| 745 | set_error(s, "<validation>", json_error_wrong_type, "Expected integer, got %s", |
| 746 | type_name(root)); |
| 747 | return -1; |
| 748 | } |
| 749 | |
| 750 | if(!(s->flags & JSON_VALIDATE_ONLY)) { |
| 751 | json_int_t *target = va_arg(*ap, json_int_t*); |
| 752 | if(root) |
| 753 | *target = json_integer_value(root); |
| 754 | } |
| 755 | |
| 756 | return 0; |
| 757 | |
| 758 | case 'b': |
| 759 | if(root && !json_is_boolean(root)) { |
| 760 | set_error(s, "<validation>", json_error_wrong_type, "Expected true or false, got %s", |
| 761 | type_name(root)); |
| 762 | return -1; |
| 763 | } |
| 764 | |
| 765 | if(!(s->flags & JSON_VALIDATE_ONLY)) { |
| 766 | int *target = va_arg(*ap, int*); |
| 767 | if(root) |
| 768 | *target = json_is_true(root); |
| 769 | } |
| 770 | |
| 771 | return 0; |
| 772 | |
| 773 | case 'f': |
| 774 | if(root && !json_is_real(root)) { |
| 775 | set_error(s, "<validation>", json_error_wrong_type, "Expected real, got %s", |
| 776 | type_name(root)); |
| 777 | return -1; |
| 778 | } |
| 779 | |
| 780 | if(!(s->flags & JSON_VALIDATE_ONLY)) { |
| 781 | double *target = va_arg(*ap, double*); |
| 782 | if(root) |
| 783 | *target = json_real_value(root); |
| 784 | } |
| 785 | |
| 786 | return 0; |
| 787 | |
| 788 | case 'F': |
| 789 | if(root && !json_is_number(root)) { |
| 790 | set_error(s, "<validation>", json_error_wrong_type, "Expected real or integer, got %s", |
| 791 | type_name(root)); |
| 792 | return -1; |
| 793 | } |
| 794 | |
| 795 | if(!(s->flags & JSON_VALIDATE_ONLY)) { |
| 796 | double *target = va_arg(*ap, double*); |
| 797 | if(root) |
| 798 | *target = json_number_value(root); |
| 799 | } |
| 800 | |
| 801 | return 0; |
| 802 | |
| 803 | case 'O': |
| 804 | if(root && !(s->flags & JSON_VALIDATE_ONLY)) |
| 805 | json_incref(root); |
| 806 | /* Fall through */ |
| 807 | |
| 808 | case 'o': |
| 809 | if(!(s->flags & JSON_VALIDATE_ONLY)) { |
| 810 | json_t **target = va_arg(*ap, json_t**); |
| 811 | if(root) |
| 812 | *target = root; |
| 813 | } |
| 814 | |
| 815 | return 0; |
| 816 | |
| 817 | case 'n': |
| 818 | /* Never assign, just validate */ |
| 819 | if(root && !json_is_null(root)) { |
| 820 | set_error(s, "<validation>", json_error_wrong_type, "Expected null, got %s", |
| 821 | type_name(root)); |
| 822 | return -1; |
| 823 | } |
| 824 | return 0; |
| 825 | |
| 826 | default: |
| 827 | set_error(s, "<format>", json_error_invalid_format, "Unexpected format character '%c'", |
| 828 | token(s)); |
| 829 | return -1; |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | json_t *json_vpack_ex(json_error_t *error, size_t flags, |
| 834 | const char *fmt, va_list ap) |
| 835 | { |
| 836 | scanner_t s; |
| 837 | va_list ap_copy; |
| 838 | json_t *value; |
| 839 | |
| 840 | if(!fmt || !*fmt) { |
| 841 | jsonp_error_init(error, "<format>"); |
| 842 | jsonp_error_set(error, -1, -1, 0, json_error_invalid_argument, "NULL or empty format string"); |
| 843 | return NULL; |
| 844 | } |
| 845 | jsonp_error_init(error, NULL); |
| 846 | |
| 847 | scanner_init(&s, error, flags, fmt); |
| 848 | next_token(&s); |
| 849 | |
| 850 | va_copy(ap_copy, ap); |
| 851 | value = pack(&s, &ap_copy); |
| 852 | va_end(ap_copy); |
| 853 | |
| 854 | /* This will cover all situations where s.has_error is true */ |
| 855 | if(!value) |
| 856 | return NULL; |
| 857 | |
| 858 | next_token(&s); |
| 859 | if(token(&s)) { |
| 860 | json_decref(value); |
| 861 | set_error(&s, "<format>", json_error_invalid_format, "Garbage after format string"); |
| 862 | return NULL; |
| 863 | } |
| 864 | |
| 865 | return value; |
| 866 | } |
| 867 | |
| 868 | json_t *json_pack_ex(json_error_t *error, size_t flags, const char *fmt, ...) |
| 869 | { |
| 870 | json_t *value; |
| 871 | va_list ap; |
| 872 | |
| 873 | va_start(ap, fmt); |
| 874 | value = json_vpack_ex(error, flags, fmt, ap); |
| 875 | va_end(ap); |
| 876 | |
| 877 | return value; |
| 878 | } |
| 879 | |
| 880 | json_t *json_pack(const char *fmt, ...) |
| 881 | { |
| 882 | json_t *value; |
| 883 | va_list ap; |
| 884 | |
| 885 | va_start(ap, fmt); |
| 886 | value = json_vpack_ex(NULL, 0, fmt, ap); |
| 887 | va_end(ap); |
| 888 | |
| 889 | return value; |
| 890 | } |
| 891 | |
| 892 | int json_vunpack_ex(json_t *root, json_error_t *error, size_t flags, |
| 893 | const char *fmt, va_list ap) |
| 894 | { |
| 895 | scanner_t s; |
| 896 | va_list ap_copy; |
| 897 | |
| 898 | if(!root) { |
| 899 | jsonp_error_init(error, "<root>"); |
| 900 | jsonp_error_set(error, -1, -1, 0, json_error_null_value, "NULL root value"); |
| 901 | return -1; |
| 902 | } |
| 903 | |
| 904 | if(!fmt || !*fmt) { |
| 905 | jsonp_error_init(error, "<format>"); |
| 906 | jsonp_error_set(error, -1, -1, 0, json_error_invalid_argument, "NULL or empty format string"); |
| 907 | return -1; |
| 908 | } |
| 909 | jsonp_error_init(error, NULL); |
| 910 | |
| 911 | scanner_init(&s, error, flags, fmt); |
| 912 | next_token(&s); |
| 913 | |
| 914 | va_copy(ap_copy, ap); |
| 915 | if(unpack(&s, root, &ap_copy)) { |
| 916 | va_end(ap_copy); |
| 917 | return -1; |
| 918 | } |
| 919 | va_end(ap_copy); |
| 920 | |
| 921 | next_token(&s); |
| 922 | if(token(&s)) { |
| 923 | set_error(&s, "<format>", json_error_invalid_format, "Garbage after format string"); |
| 924 | return -1; |
| 925 | } |
| 926 | |
| 927 | return 0; |
| 928 | } |
| 929 | |
| 930 | int json_unpack_ex(json_t *root, json_error_t *error, size_t flags, const char *fmt, ...) |
| 931 | { |
| 932 | int ret; |
| 933 | va_list ap; |
| 934 | |
| 935 | va_start(ap, fmt); |
| 936 | ret = json_vunpack_ex(root, error, flags, fmt, ap); |
| 937 | va_end(ap); |
| 938 | |
| 939 | return ret; |
| 940 | } |
| 941 | |
| 942 | int json_unpack(json_t *root, const char *fmt, ...) |
| 943 | { |
| 944 | int ret; |
| 945 | va_list ap; |
| 946 | |
| 947 | va_start(ap, fmt); |
| 948 | ret = json_vunpack_ex(root, NULL, 0, fmt, ap); |
| 949 | va_end(ap); |
| 950 | |
| 951 | return ret; |
| 952 | } |