| 1 | /* |
| 2 | * Copyright (c) 2009-2016 Petri Lehtinen <petri@digip.org> |
| 3 | * |
| 4 | * Jansson is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the MIT license. See LICENSE for details. |
| 6 | */ |
| 7 | |
| 8 | #ifndef JANSSON_H |
| 9 | #define JANSSON_H |
| 10 | |
| 11 | #include <stdio.h> |
| 12 | #include <stdlib.h> /* for size_t */ |
| 13 | #include <stdarg.h> |
| 14 | |
| 15 | #include "jansson_config.h" |
| 16 | |
| 17 | #ifdef __cplusplus |
| 18 | extern "C" { |
| 19 | #endif |
| 20 | |
| 21 | /* version */ |
| 22 | |
| 23 | #define JANSSON_MAJOR_VERSION 2 |
| 24 | #define JANSSON_MINOR_VERSION 12 |
| 25 | #define JANSSON_MICRO_VERSION 0 |
| 26 | |
| 27 | /* Micro version is omitted if it's 0 */ |
| 28 | #define JANSSON_VERSION "2.12" |
| 29 | |
| 30 | /* Version as a 3-byte hex number, e.g. 0x010201 == 1.2.1. Use this |
| 31 | for numeric comparisons, e.g. #if JANSSON_VERSION_HEX >= ... */ |
| 32 | #define JANSSON_VERSION_HEX ((JANSSON_MAJOR_VERSION << 16) | \ |
| 33 | (JANSSON_MINOR_VERSION << 8) | \ |
| 34 | (JANSSON_MICRO_VERSION << 0)) |
| 35 | |
| 36 | /* If __atomic or __sync builtins are available the library is thread |
| 37 | * safe for all read-only functions plus reference counting. */ |
| 38 | #if JSON_HAVE_ATOMIC_BUILTINS || JSON_HAVE_SYNC_BUILTINS |
| 39 | #define JANSSON_THREAD_SAFE_REFCOUNT 1 |
| 40 | #endif |
| 41 | |
| 42 | #if defined(__GNUC__) || defined(__clang__) |
| 43 | #define JANSSON_ATTRS(...) __attribute__((__VA_ARGS__)) |
| 44 | #else |
| 45 | #define JANSSON_ATTRS(...) |
| 46 | #endif |
| 47 | |
| 48 | /* types */ |
| 49 | |
| 50 | typedef enum { |
| 51 | JSON_OBJECT, |
| 52 | JSON_ARRAY, |
| 53 | JSON_STRING, |
| 54 | JSON_INTEGER, |
| 55 | JSON_REAL, |
| 56 | JSON_TRUE, |
| 57 | JSON_FALSE, |
| 58 | JSON_NULL |
| 59 | } json_type; |
| 60 | |
| 61 | typedef struct json_t { |
| 62 | json_type type; |
| 63 | volatile size_t refcount; |
| 64 | } json_t; |
| 65 | |
| 66 | #ifndef JANSSON_USING_CMAKE /* disabled if using cmake */ |
| 67 | #if JSON_INTEGER_IS_LONG_LONG |
| 68 | #ifdef _WIN32 |
| 69 | #define JSON_INTEGER_FORMAT "I64d" |
| 70 | #else |
| 71 | #define JSON_INTEGER_FORMAT "lld" |
| 72 | #endif |
| 73 | typedef long long json_int_t; |
| 74 | #else |
| 75 | #define JSON_INTEGER_FORMAT "ld" |
| 76 | typedef long json_int_t; |
| 77 | #endif /* JSON_INTEGER_IS_LONG_LONG */ |
| 78 | #endif |
| 79 | |
| 80 | #define json_typeof(json) ((json)->type) |
| 81 | #define json_is_object(json) ((json) && json_typeof(json) == JSON_OBJECT) |
| 82 | #define json_is_array(json) ((json) && json_typeof(json) == JSON_ARRAY) |
| 83 | #define json_is_string(json) ((json) && json_typeof(json) == JSON_STRING) |
| 84 | #define json_is_integer(json) ((json) && json_typeof(json) == JSON_INTEGER) |
| 85 | #define json_is_real(json) ((json) && json_typeof(json) == JSON_REAL) |
| 86 | #define json_is_number(json) (json_is_integer(json) || json_is_real(json)) |
| 87 | #define json_is_true(json) ((json) && json_typeof(json) == JSON_TRUE) |
| 88 | #define json_is_false(json) ((json) && json_typeof(json) == JSON_FALSE) |
| 89 | #define json_boolean_value json_is_true |
| 90 | #define json_is_boolean(json) (json_is_true(json) || json_is_false(json)) |
| 91 | #define json_is_null(json) ((json) && json_typeof(json) == JSON_NULL) |
| 92 | |
| 93 | /* construction, destruction, reference counting */ |
| 94 | |
| 95 | json_t *json_object(void); |
| 96 | json_t *json_array(void); |
| 97 | json_t *json_string(const char *value); |
| 98 | json_t *json_stringn(const char *value, size_t len); |
| 99 | json_t *json_string_nocheck(const char *value); |
| 100 | json_t *json_stringn_nocheck(const char *value, size_t len); |
| 101 | json_t *json_integer(json_int_t value); |
| 102 | json_t *json_real(double value); |
| 103 | json_t *json_true(void); |
| 104 | json_t *json_false(void); |
| 105 | #define json_boolean(val) ((val) ? json_true() : json_false()) |
| 106 | json_t *json_null(void); |
| 107 | |
| 108 | /* do not call JSON_INTERNAL_INCREF or JSON_INTERNAL_DECREF directly */ |
| 109 | #if JSON_HAVE_ATOMIC_BUILTINS |
| 110 | #define JSON_INTERNAL_INCREF(json) __atomic_add_fetch(&json->refcount, 1, __ATOMIC_ACQUIRE) |
| 111 | #define JSON_INTERNAL_DECREF(json) __atomic_sub_fetch(&json->refcount, 1, __ATOMIC_RELEASE) |
| 112 | #elif JSON_HAVE_SYNC_BUILTINS |
| 113 | #define JSON_INTERNAL_INCREF(json) __sync_add_and_fetch(&json->refcount, 1) |
| 114 | #define JSON_INTERNAL_DECREF(json) __sync_sub_and_fetch(&json->refcount, 1) |
| 115 | #else |
| 116 | #define JSON_INTERNAL_INCREF(json) (++json->refcount) |
| 117 | #define JSON_INTERNAL_DECREF(json) (--json->refcount) |
| 118 | #endif |
| 119 | |
| 120 | static JSON_INLINE |
| 121 | json_t *json_incref(json_t *json) |
| 122 | { |
| 123 | if(json && json->refcount != (size_t)-1) |
| 124 | JSON_INTERNAL_INCREF(json); |
| 125 | return json; |
| 126 | } |
| 127 | |
| 128 | /* do not call json_delete directly */ |
| 129 | void json_delete(json_t *json); |
| 130 | |
| 131 | static JSON_INLINE |
| 132 | void json_decref(json_t *json) |
| 133 | { |
| 134 | if(json && json->refcount != (size_t)-1 && JSON_INTERNAL_DECREF(json) == 0) |
| 135 | json_delete(json); |
| 136 | } |
| 137 | |
| 138 | #if defined(__GNUC__) || defined(__clang__) |
| 139 | static JSON_INLINE |
| 140 | void json_decrefp(json_t **json) |
| 141 | { |
| 142 | if(json) { |
| 143 | json_decref(*json); |
| 144 | *json = NULL; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | #define json_auto_t json_t __attribute__((cleanup(json_decrefp))) |
| 149 | #endif |
| 150 | |
| 151 | |
| 152 | /* error reporting */ |
| 153 | |
| 154 | #define JSON_ERROR_TEXT_LENGTH 160 |
| 155 | #define JSON_ERROR_SOURCE_LENGTH 80 |
| 156 | |
| 157 | typedef struct json_error_t { |
| 158 | int line; |
| 159 | int column; |
| 160 | int position; |
| 161 | char source[JSON_ERROR_SOURCE_LENGTH]; |
| 162 | char text[JSON_ERROR_TEXT_LENGTH]; |
| 163 | } json_error_t; |
| 164 | |
| 165 | enum json_error_code { |
| 166 | json_error_unknown, |
| 167 | json_error_out_of_memory, |
| 168 | json_error_stack_overflow, |
| 169 | json_error_cannot_open_file, |
| 170 | json_error_invalid_argument, |
| 171 | json_error_invalid_utf8, |
| 172 | json_error_premature_end_of_input, |
| 173 | json_error_end_of_input_expected, |
| 174 | json_error_invalid_syntax, |
| 175 | json_error_invalid_format, |
| 176 | json_error_wrong_type, |
| 177 | json_error_null_character, |
| 178 | json_error_null_value, |
| 179 | json_error_null_byte_in_key, |
| 180 | json_error_duplicate_key, |
| 181 | json_error_numeric_overflow, |
| 182 | json_error_item_not_found, |
| 183 | json_error_index_out_of_range |
| 184 | }; |
| 185 | |
| 186 | static JSON_INLINE enum json_error_code json_error_code(const json_error_t *e) { |
| 187 | return (enum json_error_code)e->text[JSON_ERROR_TEXT_LENGTH - 1]; |
| 188 | } |
| 189 | |
| 190 | /* getters, setters, manipulation */ |
| 191 | |
| 192 | void json_object_seed(size_t seed); |
| 193 | size_t json_object_size(const json_t *object); |
| 194 | json_t *json_object_get(const json_t *object, const char *key) JANSSON_ATTRS(warn_unused_result); |
| 195 | int json_object_set_new(json_t *object, const char *key, json_t *value); |
| 196 | int json_object_set_new_nocheck(json_t *object, const char *key, json_t *value); |
| 197 | int json_object_del(json_t *object, const char *key); |
| 198 | int json_object_clear(json_t *object); |
| 199 | int json_object_update(json_t *object, json_t *other); |
| 200 | int json_object_update_existing(json_t *object, json_t *other); |
| 201 | int json_object_update_missing(json_t *object, json_t *other); |
| 202 | void *json_object_iter(json_t *object); |
| 203 | void *json_object_iter_at(json_t *object, const char *key); |
| 204 | void *json_object_key_to_iter(const char *key); |
| 205 | void *json_object_iter_next(json_t *object, void *iter); |
| 206 | const char *json_object_iter_key(void *iter); |
| 207 | json_t *json_object_iter_value(void *iter); |
| 208 | int json_object_iter_set_new(json_t *object, void *iter, json_t *value); |
| 209 | |
| 210 | #define json_object_foreach(object, key, value) \ |
| 211 | for(key = json_object_iter_key(json_object_iter(object)); \ |
| 212 | key && (value = json_object_iter_value(json_object_key_to_iter(key))); \ |
| 213 | key = json_object_iter_key(json_object_iter_next(object, json_object_key_to_iter(key)))) |
| 214 | |
| 215 | #define json_object_foreach_safe(object, n, key, value) \ |
| 216 | for(key = json_object_iter_key(json_object_iter(object)), \ |
| 217 | n = json_object_iter_next(object, json_object_key_to_iter(key)); \ |
| 218 | key && (value = json_object_iter_value(json_object_key_to_iter(key))); \ |
| 219 | key = json_object_iter_key(n), \ |
| 220 | n = json_object_iter_next(object, json_object_key_to_iter(key))) |
| 221 | |
| 222 | #define json_array_foreach(array, index, value) \ |
| 223 | for(index = 0; \ |
| 224 | index < json_array_size(array) && (value = json_array_get(array, index)); \ |
| 225 | index++) |
| 226 | |
| 227 | static JSON_INLINE |
| 228 | int json_object_set(json_t *object, const char *key, json_t *value) |
| 229 | { |
| 230 | return json_object_set_new(object, key, json_incref(value)); |
| 231 | } |
| 232 | |
| 233 | static JSON_INLINE |
| 234 | int json_object_set_nocheck(json_t *object, const char *key, json_t *value) |
| 235 | { |
| 236 | return json_object_set_new_nocheck(object, key, json_incref(value)); |
| 237 | } |
| 238 | |
| 239 | static JSON_INLINE |
| 240 | int json_object_iter_set(json_t *object, void *iter, json_t *value) |
| 241 | { |
| 242 | return json_object_iter_set_new(object, iter, json_incref(value)); |
| 243 | } |
| 244 | |
| 245 | size_t json_array_size(const json_t *array); |
| 246 | json_t *json_array_get(const json_t *array, size_t index) JANSSON_ATTRS(warn_unused_result); |
| 247 | int json_array_set_new(json_t *array, size_t index, json_t *value); |
| 248 | int json_array_append_new(json_t *array, json_t *value); |
| 249 | int json_array_insert_new(json_t *array, size_t index, json_t *value); |
| 250 | int json_array_remove(json_t *array, size_t index); |
| 251 | int json_array_clear(json_t *array); |
| 252 | int json_array_extend(json_t *array, json_t *other); |
| 253 | |
| 254 | static JSON_INLINE |
| 255 | int json_array_set(json_t *array, size_t ind, json_t *value) |
| 256 | { |
| 257 | return json_array_set_new(array, ind, json_incref(value)); |
| 258 | } |
| 259 | |
| 260 | static JSON_INLINE |
| 261 | int json_array_append(json_t *array, json_t *value) |
| 262 | { |
| 263 | return json_array_append_new(array, json_incref(value)); |
| 264 | } |
| 265 | |
| 266 | static JSON_INLINE |
| 267 | int json_array_insert(json_t *array, size_t ind, json_t *value) |
| 268 | { |
| 269 | return json_array_insert_new(array, ind, json_incref(value)); |
| 270 | } |
| 271 | |
| 272 | const char *json_string_value(const json_t *string); |
| 273 | size_t json_string_length(const json_t *string); |
| 274 | json_int_t json_integer_value(const json_t *integer); |
| 275 | double json_real_value(const json_t *real); |
| 276 | double json_number_value(const json_t *json); |
| 277 | |
| 278 | int json_string_set(json_t *string, const char *value); |
| 279 | int json_string_setn(json_t *string, const char *value, size_t len); |
| 280 | int json_string_set_nocheck(json_t *string, const char *value); |
| 281 | int json_string_setn_nocheck(json_t *string, const char *value, size_t len); |
| 282 | int json_integer_set(json_t *integer, json_int_t value); |
| 283 | int json_real_set(json_t *real, double value); |
| 284 | |
| 285 | /* pack, unpack */ |
| 286 | |
| 287 | json_t *json_pack(const char *fmt, ...) JANSSON_ATTRS(warn_unused_result); |
| 288 | json_t *json_pack_ex(json_error_t *error, size_t flags, const char *fmt, ...) JANSSON_ATTRS(warn_unused_result); |
| 289 | json_t *json_vpack_ex(json_error_t *error, size_t flags, const char *fmt, va_list ap) JANSSON_ATTRS(warn_unused_result); |
| 290 | |
| 291 | #define JSON_VALIDATE_ONLY 0x1 |
| 292 | #define JSON_STRICT 0x2 |
| 293 | |
| 294 | int json_unpack(json_t *root, const char *fmt, ...); |
| 295 | int json_unpack_ex(json_t *root, json_error_t *error, size_t flags, const char *fmt, ...); |
| 296 | int json_vunpack_ex(json_t *root, json_error_t *error, size_t flags, const char *fmt, va_list ap); |
| 297 | |
| 298 | /* sprintf */ |
| 299 | |
| 300 | json_t *json_sprintf(const char *fmt, ...) JANSSON_ATTRS(warn_unused_result, format(printf, 1, 2)); |
| 301 | json_t *json_vsprintf(const char *fmt, va_list ap) JANSSON_ATTRS(warn_unused_result, format(printf, 1, 0)); |
| 302 | |
| 303 | |
| 304 | /* equality */ |
| 305 | |
| 306 | int json_equal(const json_t *value1, const json_t *value2); |
| 307 | |
| 308 | |
| 309 | /* copying */ |
| 310 | |
| 311 | json_t *json_copy(json_t *value) JANSSON_ATTRS(warn_unused_result); |
| 312 | json_t *json_deep_copy(const json_t *value) JANSSON_ATTRS(warn_unused_result); |
| 313 | |
| 314 | json_t *json_path_get(const json_t *json, const char *path); |
| 315 | int json_path_set_new(json_t *json, const char *path, json_t *value, size_t flags, json_error_t *error); |
| 316 | |
| 317 | static JSON_INLINE |
| 318 | int json_path_set(json_t *json, const char *path, json_t *value, size_t flags, json_error_t *error) |
| 319 | { |
| 320 | return json_path_set_new(json, path, json_incref(value), flags, error); |
| 321 | } |
| 322 | |
| 323 | /* decoding */ |
| 324 | |
| 325 | #define JSON_REJECT_DUPLICATES 0x1 |
| 326 | #define JSON_DISABLE_EOF_CHECK 0x2 |
| 327 | #define JSON_DECODE_ANY 0x4 |
| 328 | #define JSON_DECODE_INT_AS_REAL 0x8 |
| 329 | #define JSON_ALLOW_NUL 0x10 |
| 330 | |
| 331 | typedef size_t (*json_load_callback_t)(void *buffer, size_t buflen, void *data); |
| 332 | |
| 333 | json_t *json_loads(const char *input, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result); |
| 334 | json_t *json_loadb(const char *buffer, size_t buflen, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result); |
| 335 | json_t *json_loadf(FILE *input, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result); |
| 336 | json_t *json_loadfd(int input, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result); |
| 337 | json_t *json_load_file(const char *path, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result); |
| 338 | json_t *json_load_callback(json_load_callback_t callback, void *data, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result); |
| 339 | |
| 340 | |
| 341 | /* encoding */ |
| 342 | |
| 343 | #define JSON_MAX_INDENT 0x1F |
| 344 | #define JSON_INDENT(n) ((n) & JSON_MAX_INDENT) |
| 345 | #define JSON_COMPACT 0x20 |
| 346 | #define JSON_ENSURE_ASCII 0x40 |
| 347 | #define JSON_SORT_KEYS 0x80 |
| 348 | #define JSON_PRESERVE_ORDER 0x100 |
| 349 | #define JSON_ENCODE_ANY 0x200 |
| 350 | #define JSON_ESCAPE_SLASH 0x400 |
| 351 | #define JSON_REAL_PRECISION(n) (((n) & 0x1F) << 11) |
| 352 | #define JSON_EMBED 0x10000 |
| 353 | |
| 354 | typedef int (*json_dump_callback_t)(const char *buffer, size_t size, void *data); |
| 355 | |
| 356 | char *json_dumps(const json_t *json, size_t flags) JANSSON_ATTRS(warn_unused_result); |
| 357 | size_t json_dumpb(const json_t *json, char *buffer, size_t size, size_t flags); |
| 358 | int json_dumpf(const json_t *json, FILE *output, size_t flags); |
| 359 | int json_dumpfd(const json_t *json, int output, size_t flags); |
| 360 | int json_dump_file(const json_t *json, const char *path, size_t flags); |
| 361 | int json_dump_callback(const json_t *json, json_dump_callback_t callback, void *data, size_t flags); |
| 362 | |
| 363 | /* custom memory allocation */ |
| 364 | |
| 365 | typedef void *(*json_malloc_t)(size_t); |
| 366 | typedef void (*json_free_t)(void *); |
| 367 | |
| 368 | void json_set_alloc_funcs(json_malloc_t malloc_fn, json_free_t free_fn); |
| 369 | void json_get_alloc_funcs(json_malloc_t *malloc_fn, json_free_t *free_fn); |
| 370 | |
| 371 | #ifdef __cplusplus |
| 372 | } |
| 373 | #endif |
| 374 | |
| 375 | #endif |