projects / mirror_edk2.git / blame
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1 | /** @file\r |
| 2 | APIs for JSON operations.\r | |
| 3 | \r | |
| 4 | Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>\r | |
| 5 | (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>\r | |
| 6 | \r | |
| 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
| 8 | \r | |
| 9 | **/\r | |
| 10 | #ifndef JSON_LIB_H_\r | |
| 11 | #define JSON_LIB_H_\r | |
| 12 | \r | |
| 13 | typedef VOID* EDKII_JSON_VALUE;\r | |
| 14 | typedef VOID* EDKII_JSON_ARRAY;\r | |
| 15 | typedef VOID* EDKII_JSON_OBJECT;\r | |
| 16 | \r | |
| 17 | ///\r | |
| 18 | /// Map to json_int_t in jansson.h\r | |
| 19 | ///\r | |
| 20 | typedef INT64 EDKII_JSON_INT_T; // #JSON_INTEGER_IS_LONG_LONG is set to 1\r | |
| 21 | // in jansson_Config.h\r | |
| 22 | \r | |
| 23 | ///\r | |
| 24 | /// Map to the definitions in jansson.h\r | |
| 25 | /// See below URI for the JSON encoding flags reference.\r | |
| 26 | /// https://jansson.readthedocs.io/en/2.13/apiref.html#encoding\r | |
| 27 | ///\r | |
| 28 | #define EDKII_JSON_MAX_INDENT 0x1F\r | |
| 29 | #define EDKII_JSON_INDENT(n) ((n) & EDKII_JSON_MAX_INDENT)\r | |
| 30 | \r | |
| 31 | #define EDKII_JSON_COMPACT 0x20\r | |
| 32 | #define EDKII_JSON_ENSURE_ASCII 0x40\r | |
| 33 | #define EDKII_JSON_SORT_KEYS 0x80\r | |
| 34 | #define EDKII_JSON_PRESERVE_ORDER 0x100\r | |
| 35 | #define EDKII_JSON_ENCODE_ANY 0x200\r | |
| 36 | #define EDKII_JSON_ESCAPE_SLASH 0x400\r | |
| 37 | #define EDKII_JSON_REAL_PRECISION(n) (((n) & 0x1F) << 11)\r | |
| 38 | #define EDKII_JSON_EMBED 0x10000\r | |
| 39 | \r | |
| 40 | ///\r | |
| 41 | /// Map to the definitions in jansson.h\r | |
| 42 | /// See below URI for the JSON decoding flags reference.\r | |
| 43 | /// https://jansson.readthedocs.io/en/2.13/apiref.html?highlight=json_loadb#decoding\r | |
| 44 | ///\r | |
| 45 | #define EDKII_JSON_REJECT_DUPLICATES 0x1\r | |
| 46 | #define EDKII_JSON_DISABLE_EOF_CHECK 0x2\r | |
| 47 | #define EDKII_JSON_DECODE_ANY 0x4\r | |
| 48 | #define EDKII_JSON_DECODE_INT_AS_REAL 0x8\r | |
| 49 | #define EDKII_JSON_ALLOW_NUL 0x10\r | |
| 50 | \r | |
| 51 | #define EDKII_JSON_ARRAY_FOREACH(Array, Index, Value) \\r | |
| 52 | for(Index = 0; \\r | |
| 53 | Index < JsonArrayCount(Array) && (Value = JsonArrayGetValue(Array, Index)); \\r | |
| 54 | Index++)\r | |
| 55 | \r | |
| 56 | ///\r | |
| 57 | /// Map to the json_error_t in jansson.h\r | |
| 58 | ///\r | |
| 59 | #define EDKII_JSON_ERROR_TEXT_LENGTH 160\r | |
| 60 | #define EDKII_JSON_ERROR_SOURCE_LENGTH 80\r | |
| 61 | typedef struct {\r | |
| 62 | INTN Line;\r | |
| 63 | INTN Column;\r | |
| 64 | INTN Position;\r | |
| 65 | CHAR8 Source [EDKII_JSON_ERROR_SOURCE_LENGTH];\r | |
| 66 | CHAR8 Text [EDKII_JSON_ERROR_TEXT_LENGTH];\r | |
| 67 | } EDKII_JSON_ERROR;\r | |
| 68 | \r | |
| 69 | ///\r | |
| 70 | /// Map to the json_type in jansson.h\r | |
| 71 | ///\r | |
| 72 | typedef enum {\r | |
| 73 | EdkiiJsonTypeObject,\r | |
| 74 | EdkiiJsonTypeArray,\r | |
| 75 | EdkiiJsonTypeString,\r | |
| 76 | EdkiiJsonTypeInteger,\r | |
| 77 | EdkiiJsonTypeReal,\r | |
| 78 | EdkiiJsonTypeTrue,\r | |
| 79 | EdkiiJsonTypeFalse,\r | |
| 80 | EdkiiJsonTypeNull\r | |
| 81 | } EDKII_JSON_TYPE;\r | |
| 82 | \r | |
| 83 | /**\r | |
| 84 | The function is used to initialize a JSON value which contains a new JSON array,\r | |
| 85 | or NULL on error. Initially, the array is empty.\r | |
| 86 | \r | |
| 87 | The reference count of this value will be set to 1, and caller needs to cleanup the\r | |
| 88 | value by calling JsonValueFree().\r | |
| 89 | \r | |
| 90 | More details for reference count strategy can refer to the API description for JsonValueFree().\r | |
| 91 | \r | |
| 92 | @retval The created JSON value which contains a JSON array or NULL if intial a JSON array\r | |
| 93 | is failed.\r | |
| 94 | \r | |
| 95 | **/\r | |
| 96 | EDKII_JSON_VALUE\r | |
| 97 | EFIAPI\r | |
| 98 | JsonValueInitArray (\r | |
| 99 | VOID\r | |
| 100 | );\r | |
| 101 | \r | |
| 102 | /**\r | |
| 103 | The function is used to initialize a JSON value which contains a new JSON object,\r | |
| 104 | or NULL on error. Initially, the object is empty.\r | |
| 105 | \r | |
| 106 | The reference count of this value will be set to 1, and caller needs to cleanup the\r | |
| 107 | value by calling JsonValueFree().\r | |
| 108 | \r | |
| 109 | More details for reference count strategy can refer to the API description for JsonValueFree().\r | |
| 110 | \r | |
| 111 | @retval The created JSON value which contains a JSON object or NULL if intial a JSON object\r | |
| 112 | is failed.\r | |
| 113 | \r | |
| 114 | **/\r | |
| 115 | EDKII_JSON_VALUE\r | |
| 116 | EFIAPI\r | |
| 117 | JsonValueInitObject (\r | |
| 118 | VOID\r | |
| 119 | );\r | |
| 120 | \r | |
| 121 | /**\r | |
| 122 | The function is used to initialize a JSON value which contains a new JSON string,\r | |
| 123 | or NULL on error.\r | |
| 124 | \r | |
| 125 | The input string must be NULL terminated Ascii format, non-Ascii characters will\r | |
| 126 | be processed as an error. Unicode characters can also be represented by Ascii string\r | |
| 127 | as the format: \u + 4 hexadecimal digits, like \u3E5A, or \u003F.\r | |
| 128 | \r | |
| 129 | The reference count of this value will be set to 1, and caller needs to cleanup the\r | |
| 130 | value by calling JsonValueFree().\r | |
| 131 | \r | |
| 132 | More details for reference count strategy can refer to the API description for JsonValueFree().\r | |
| 133 | \r | |
| 134 | @param[in] String The Ascii string to initialize to JSON value\r | |
| 135 | \r | |
| 136 | @retval The created JSON value which contains a JSON string or NULL. Select a\r | |
| 137 | Getter API for a specific encoding format.\r | |
| 138 | \r | |
| 139 | **/\r | |
| 140 | EDKII_JSON_VALUE\r | |
| 141 | EFIAPI\r | |
| 142 | JsonValueInitAsciiString (\r | |
| 143 | IN CONST CHAR8 *String\r | |
| 144 | );\r | |
| 145 | \r | |
| 146 | /**\r | |
| 147 | The function is used to initialize a JSON value which contains a new JSON string,\r | |
| 148 | or NULL on error.\r | |
| 149 | \r | |
| 150 | The input must be a NULL terminated UCS2 format Unicode string.\r | |
| 151 | \r | |
| 152 | The reference count of this value will be set to 1, and caller needs to cleanup the\r | |
| 153 | value by calling JsonValueFree().\r | |
| 154 | \r | |
| 155 | More details for reference count strategy can refer to the API description for JsonValueFree().\r | |
| 156 | \r | |
| 157 | @param[in] String The Unicode string to initialize to JSON value\r | |
| 158 | \r | |
| 159 | @retval The created JSON value which contains a JSON string or NULL. Select a\r | |
| 160 | Getter API for a specific encoding format.\r | |
| 161 | \r | |
| 162 | **/\r | |
| 163 | EDKII_JSON_VALUE\r | |
| 164 | EFIAPI\r | |
| 165 | JsonValueInitUnicodeString (\r | |
| 166 | IN CHAR16 *String\r | |
| 167 | );\r | |
| 168 | \r | |
| 169 | /**\r | |
| 170 | The function is used to initialize a JSON value which contains a new JSON integer,\r | |
| 171 | or NULL on error.\r | |
| 172 | \r | |
| 173 | The reference count of this value will be set to 1, and caller needs to cleanup the\r | |
| 174 | value by calling JsonValueFree().\r | |
| 175 | \r | |
| 176 | More details for reference count strategy can refer to the API description for JsonValueFree().\r | |
| 177 | \r | |
| 178 | @param[in] Value The integer to initialize to JSON value\r | |
| 179 | \r | |
| 180 | @retval The created JSON value which contains a JSON number or NULL.\r | |
| 181 | \r | |
| 182 | **/\r | |
| 183 | EDKII_JSON_VALUE\r | |
| 184 | EFIAPI\r | |
| 185 | JsonValueInitNumber (\r | |
| 186 | IN INT64 Value\r | |
| 187 | );\r | |
| 188 | \r | |
| 189 | /**\r | |
| 190 | The function is used to initialize a JSON value which contains a new JSON boolean,\r | |
| 191 | or NULL on error.\r | |
| 192 | \r | |
| 193 | Boolean JSON value is kept as static value, and no need to do any cleanup work.\r | |
| 194 | \r | |
| 195 | @param[in] Value The boolean value to initialize.\r | |
| 196 | \r | |
| 197 | @retval The created JSON value which contains a JSON boolean or NULL.\r | |
| 198 | \r | |
| 199 | **/\r | |
| 200 | EDKII_JSON_VALUE\r | |
| 201 | EFIAPI\r | |
| 202 | JsonValueInitBoolean (\r | |
| 203 | IN BOOLEAN Value\r | |
| 204 | );\r | |
| 205 | \r | |
| 206 | /**\r | |
| 207 | The function is used to initialize a JSON value which contains a new JSON NULL,\r | |
| 208 | or NULL on error.\r | |
| 209 | \r | |
| 210 | NULL JSON value is kept as static value, and no need to do any cleanup work.\r | |
| 211 | \r | |
| 212 | @retval The created NULL JSON value.\r | |
| 213 | \r | |
| 214 | **/\r | |
| 215 | EDKII_JSON_VALUE\r | |
| 216 | EFIAPI\r | |
| 217 | JsonValueInitNull (\r | |
| 218 | VOID\r | |
| 219 | );\r | |
| 220 | \r | |
| 221 | /**\r | |
| 222 | The function is used to decrease the reference count of a JSON value by one, and once\r | |
| 223 | this reference count drops to zero, the value is destroyed and it can no longer be used.\r | |
| 224 | If this destroyed value is object type or array type, reference counts for all containing\r | |
| 225 | JSON values will be decreased by 1. Boolean JSON value and NULL JSON value won't be destroyed\r | |
| 226 | since they are static values kept in memory.\r | |
| 227 | \r | |
| 228 | Reference Count Strategy: BaseJsonLib uses this strategy to track whether a value is still\r | |
| 229 | in use or not. When a value is created, it's reference count is set to 1. If a reference to a\r | |
| 230 | value is kept for use, its reference count is incremented, and when the value is no longer\r | |
| 231 | needed, the reference count is decremented. When the reference count drops to zero, there are\r | |
| 232 | no references left, and the value can be destroyed.\r | |
| 233 | \r | |
| 234 | The given JSON value maybe NULL and not causing any problem. Just output the debug message\r | |
| 235 | to inform caller the NULL value is passed in.\r | |
| 236 | \r | |
| 237 | @param[in] Json The JSON value to be freed. json_decref may return without any\r | |
| 238 | changes if Json is NULL.\r | |
| 239 | \r | |
| 240 | **/\r | |
| 241 | VOID\r | |
| 242 | EFIAPI\r | |
| 243 | JsonValueFree (\r | |
| 244 | IN EDKII_JSON_VALUE Json\r | |
| 245 | );\r | |
| 246 | \r | |
| 247 | /**\r | |
| 248 | The function is used to create a fresh copy of a JSON value, and all child values are deep\r | |
| 249 | copied in a recursive fashion. It should be called when this JSON value might be modified\r | |
| 250 | in later use, but the original still wants to be used in somewhere else.\r | |
| 251 | \r | |
| 252 | Reference counts of the returned root JSON value and all child values will be set to 1, and\r | |
| 253 | caller needs to cleanup the root value by calling JsonValueFree().\r | |
| 254 | \r | |
| 255 | * Note: Since this function performs a copy from bottom to up, too many calls may cause some\r | |
| 256 | performance issues, user should avoid unnecessary calls to this function unless it is really\r | |
| 257 | needed.\r | |
| 258 | \r | |
| 259 | @param[in] Json The JSON value to be cloned.\r | |
| 260 | \r | |
| 261 | @retval Return the cloned JSON value, or NULL on error.\r | |
| 262 | \r | |
| 263 | **/\r | |
| 264 | EDKII_JSON_VALUE\r | |
| 265 | EFIAPI\r | |
| 266 | JsonValueClone (\r | |
| 267 | IN EDKII_JSON_VALUE Json\r | |
| 268 | );\r | |
| 269 | \r | |
| 270 | /**\r | |
| 271 | The function is used to return if the provided JSON value contains a JSON array.\r | |
| 272 | \r | |
| 273 | @param[in] Json The provided JSON value.\r | |
| 274 | \r | |
| 275 | @retval TRUE The JSON value contains a JSON array.\r | |
| 276 | @retval FALSE The JSON value doesn't contain a JSON array.\r | |
| 277 | \r | |
| 278 | **/\r | |
| 279 | BOOLEAN\r | |
| 280 | EFIAPI\r | |
| 281 | JsonValueIsArray (\r | |
| 282 | IN EDKII_JSON_VALUE Json\r | |
| 283 | );\r | |
| 284 | \r | |
| 285 | /**\r | |
| 286 | The function is used to return if the provided JSON value contains a JSON object.\r | |
| 287 | \r | |
| 288 | @param[in] Json The provided JSON value.\r | |
| 289 | \r | |
| 290 | @retval TRUE The JSON value contains a JSON object.\r | |
| 291 | @retval FALSE The JSON value doesn't contain a JSON object.\r | |
| 292 | \r | |
| 293 | **/\r | |
| 294 | BOOLEAN\r | |
| 295 | EFIAPI\r | |
| 296 | JsonValueIsObject (\r | |
| 297 | IN EDKII_JSON_VALUE Json\r | |
| 298 | );\r | |
| 299 | \r | |
| 300 | /**\r | |
| 301 | The function is used to return if the provided JSON Value contains a string, Ascii or\r | |
| 302 | Unicode format is not differentiated.\r | |
| 303 | \r | |
| 304 | @param[in] Json The provided JSON value.\r | |
| 305 | \r | |
| 306 | @retval TRUE The JSON value contains a JSON string.\r | |
| 307 | @retval FALSE The JSON value doesn't contain a JSON string.\r | |
| 308 | \r | |
| 309 | **/\r | |
| 310 | BOOLEAN\r | |
| 311 | EFIAPI\r | |
| 312 | JsonValueIsString (\r | |
| 313 | IN EDKII_JSON_VALUE Json\r | |
| 314 | );\r | |
| 315 | \r | |
| 316 | /**\r | |
| 317 | The function is used to return if the provided JSON value contains a JSON number.\r | |
| 318 | \r | |
| 319 | @param[in] Json The provided JSON value.\r | |
| 320 | \r | |
| 321 | @retval TRUE The JSON value is contains JSON number.\r | |
| 322 | @retval FALSE The JSON value doesn't contain a JSON number.\r | |
| 323 | \r | |
| 324 | **/\r | |
| 325 | BOOLEAN\r | |
| 326 | EFIAPI\r | |
| 327 | JsonValueIsNumber (\r | |
| 328 | IN EDKII_JSON_VALUE Json\r | |
| 329 | );\r | |
| 330 | \r | |
| 331 | /**\r | |
| 332 | The function is used to return if the provided JSON value contains a JSON boolean.\r | |
| 333 | \r | |
| 334 | @param[in] Json The provided JSON value.\r | |
| 335 | \r | |
| 336 | @retval TRUE The JSON value contains a JSON boolean.\r | |
| 337 | @retval FALSE The JSON value doesn't contain a JSON boolean.\r | |
| 338 | \r | |
| 339 | **/\r | |
| 340 | BOOLEAN\r | |
| 341 | EFIAPI\r | |
| 342 | JsonValueIsBoolean (\r | |
| 343 | IN EDKII_JSON_VALUE Json\r | |
| 344 | );\r | |
| 345 | \r | |
| 346 | /**\r | |
| 347 | The function is used to return if the provided JSON value contains a JSON NULL.\r | |
| 348 | \r | |
| 349 | @param[in] Json The provided JSON value.\r | |
| 350 | \r | |
| 351 | @retval TRUE The JSON value contains a JSON NULL.\r | |
| 352 | @retval FALSE The JSON value doesn't contain a JSON NULL.\r | |
| 353 | \r | |
| 354 | **/\r | |
| 355 | BOOLEAN\r | |
| 356 | EFIAPI\r | |
| 357 | JsonValueIsNull (\r | |
| 358 | IN EDKII_JSON_VALUE Json\r | |
| 359 | );\r | |
| 360 | \r | |
| 361 | /**\r | |
| 362 | The function is used to retrieve the associated array in an array type JSON value.\r | |
| 363 | \r | |
| 364 | Any changes to the returned array will impact the original JSON value.\r | |
| 365 | \r | |
| 366 | @param[in] Json The provided JSON value.\r | |
| 367 | \r | |
| 368 | @retval Return the associated array in JSON value or NULL.\r | |
| 369 | \r | |
| 370 | **/\r | |
| 371 | EDKII_JSON_ARRAY\r | |
| 372 | EFIAPI\r | |
| 373 | JsonValueGetArray (\r | |
| 374 | IN EDKII_JSON_VALUE Json\r | |
| 375 | );\r | |
| 376 | \r | |
| 377 | /**\r | |
| 378 | The function is used to retrieve the associated object in an object type JSON value.\r | |
| 379 | \r | |
| 380 | Any changes to the returned object will impact the original JSON value.\r | |
| 381 | \r | |
| 382 | @param[in] Json The provided JSON value.\r | |
| 383 | \r | |
| 384 | @retval Return the associated object in JSON value or NULL.\r | |
| 385 | \r | |
| 386 | **/\r | |
| 387 | EDKII_JSON_OBJECT\r | |
| 388 | EFIAPI\r | |
| 389 | JsonValueGetObject (\r | |
| 390 | IN EDKII_JSON_VALUE Json\r | |
| 391 | );\r | |
| 392 | \r | |
| 393 | /**\r | |
| 394 | The function is used to retrieve the associated Ascii string in a string type JSON value.\r | |
| 395 | \r | |
| 396 | Any changes to the returned string will impact the original JSON value.\r | |
| 397 | \r | |
| 398 | @param[in] Json The provided JSON value.\r | |
| 399 | \r | |
| 400 | @retval Return the associated Ascii string in JSON value or NULL.\r | |
| 401 | \r | |
| 402 | **/\r | |
| 403 | CONST CHAR8 *\r | |
| 404 | EFIAPI\r | |
| 405 | JsonValueGetAsciiString (\r | |
| 406 | IN EDKII_JSON_VALUE Json\r | |
| 407 | );\r | |
| 408 | \r | |
| 409 | /**\r | |
| 410 | The function is used to retrieve the associated Unicode string in a string type JSON value.\r | |
| 411 | \r | |
| 412 | Caller can do any changes to the returned string without any impact to the original JSON\r | |
| 413 | value, and caller needs to free the returned string using FreePool().\r | |
| 414 | \r | |
| 415 | @param[in] Json The provided JSON value.\r | |
| 416 | \r | |
| 417 | @retval Return the associated Unicode string in JSON value or NULL.\r | |
| 418 | \r | |
| 419 | **/\r | |
| 420 | CHAR16*\r | |
| 421 | EFIAPI\r | |
| 422 | JsonValueGetUnicodeString (\r | |
| 423 | IN EDKII_JSON_VALUE Json\r | |
| 424 | );\r | |
| 425 | \r | |
| 426 | /**\r | |
| 427 | The function is used to retrieve the associated integer in a number type JSON value.\r | |
| 428 | \r | |
| 429 | The input JSON value should not be NULL or contain no JSON number, otherwise it will\r | |
| 430 | ASSERT() and return 0.\r | |
| 431 | \r | |
| 432 | @param[in] Json The provided JSON value.\r | |
| 433 | \r | |
| 434 | @retval Return the associated number in JSON value.\r | |
| 435 | \r | |
| 436 | **/\r | |
| 437 | INT64\r | |
| 438 | EFIAPI\r | |
| 439 | JsonValueGetNumber (\r | |
| 440 | IN EDKII_JSON_VALUE Json\r | |
| 441 | );\r | |
| 442 | \r | |
| 443 | /**\r | |
| 444 | The function is used to retrieve the associated boolean in a boolean type JSON value.\r | |
| 445 | \r | |
| 446 | The input JSON value should not be NULL or contain no JSON boolean, otherwise it will\r | |
| 447 | ASSERT() and return FALSE.\r | |
| 448 | \r | |
| 449 | @param[in] Json The provided JSON value.\r | |
| 450 | \r | |
| 451 | @retval Return the associated value of JSON boolean.\r | |
| 452 | \r | |
| 453 | **/\r | |
| 454 | BOOLEAN\r | |
| 455 | EFIAPI\r | |
| 456 | JsonValueGetBoolean (\r | |
| 457 | IN EDKII_JSON_VALUE Json\r | |
| 458 | );\r | |
| 459 | \r | |
| 460 | /**\r | |
| 461 | The function is used to retrieve the associated string in a string type JSON value.\r | |
| 462 | \r | |
| 463 | Any changes to the returned string will impact the original JSON value.\r | |
| 464 | \r | |
| 465 | @param[in] Json The provided JSON value.\r | |
| 466 | \r | |
| 467 | @retval Return the associated Ascii string in JSON value or NULL on errors.\r | |
| 468 | \r | |
| 469 | **/\r | |
| 470 | CONST CHAR8*\r | |
| 471 | EFIAPI\r | |
| 472 | JsonValueGetString (\r | |
| 473 | IN EDKII_JSON_VALUE Json\r | |
| 474 | );\r | |
| 475 | \r | |
| 476 | /**\r | |
| 477 | The function is used to get the number of elements in a JSON object, or 0 if it is NULL or\r | |
| 478 | not a JSON object.\r | |
| 479 | \r | |
| 480 | @param[in] JsonObject The provided JSON object.\r | |
| 481 | \r | |
| 482 | @retval Return the number of elements in this JSON object or 0.\r | |
| 483 | \r | |
| 484 | **/\r | |
| 485 | UINTN\r | |
| 486 | EFIAPI\r | |
| 487 | JsonObjectSize (\r | |
| 488 | IN EDKII_JSON_OBJECT JsonObject\r | |
| 489 | );\r | |
| 490 | \r | |
| 491 | /**\r | |
| 492 | The function is used to enumerate all keys in a JSON object.\r | |
| 493 | \r | |
| 494 | Caller should be responsible to free the returned key array reference using\r | |
| 495 | FreePool(). But contained keys are read only and must not be modified or freed.\r | |
| 496 | \r | |
| 497 | @param[in] JsonObj The provided JSON object for enumeration.\r | |
| 498 | @param[out] KeyCount The count of keys in this JSON object.\r | |
| 499 | \r | |
| 500 | @retval Return an array of the enumerated keys in this JSON object or NULL if\r | |
| 501 | JsonObj is not an JSON object, key count is zero or on other errors.\r | |
| 502 | \r | |
| 503 | **/\r | |
| 504 | CHAR8**\r | |
| 505 | JsonObjectGetKeys (\r | |
| 506 | IN EDKII_JSON_OBJECT JsonObj,\r | |
| 507 | OUT UINTN *KeyCount\r | |
| 508 | );\r | |
| 509 | \r | |
| 510 | /**\r | |
| 511 | The function is used to get a JSON value corresponding to the input key from a JSON object.\r | |
| 512 | \r | |
| 513 | It only returns a reference to this value and any changes on this value will impact the\r | |
| 514 | original JSON object. If that is not expected, please call JsonValueClone() to clone it to\r | |
| 515 | use.\r | |
| 516 | \r | |
| 517 | Input key must be a valid NULL terminated UTF8 encoded string. NULL will be returned when\r | |
| 518 | Key-Value is not found in this JSON object.\r | |
| 519 | \r | |
| 520 | @param[in] JsonObj The provided JSON object.\r | |
| 521 | @param[in] Key The key of the JSON value to be retrieved.\r | |
| 522 | \r | |
| 523 | @retval Return the corresponding JSON value to key, or NULL on error.\r | |
| 524 | \r | |
| 525 | **/\r | |
| 526 | EDKII_JSON_VALUE\r | |
| 527 | EFIAPI\r | |
| 528 | JsonObjectGetValue (\r | |
| 529 | IN CONST EDKII_JSON_OBJECT JsonObj,\r | |
| 530 | IN CONST CHAR8 *Key\r | |
| 531 | );\r | |
| 532 | \r | |
| 533 | /**\r | |
| 534 | The function is used to set a JSON value corresponding to the input key from a JSON object,\r | |
| 535 | and the reference count of this value will be increased by 1.\r | |
| 536 | \r | |
| 537 | Input key must be a valid NULL terminated UTF8 encoded string. If there already is a value for\r | |
| 538 | this key, this key will be assigned to the new JSON value. The old JSON value will be removed\r | |
| 539 | from this object and thus its' reference count will be decreased by 1.\r | |
| 540 | \r | |
| 541 | More details for reference count strategy can refer to the API description for JsonValueFree().\r | |
| 542 | \r | |
| 543 | @param[in] JsonObj The provided JSON object.\r | |
| 544 | @param[in] Key The key of the JSON value to be set.\r | |
| 545 | @param[in] Json The JSON value to set to this JSON object mapped by key.\r | |
| 546 | \r | |
| 547 | @retval EFI_ABORTED Some error occur and operation aborted.\r | |
| 548 | @retval EFI_SUCCESS The JSON value has been set to this JSON object.\r | |
| 549 | \r | |
| 550 | **/\r | |
| 551 | EFI_STATUS\r | |
| 552 | EFIAPI\r | |
| 553 | JsonObjectSetValue (\r | |
| 554 | IN EDKII_JSON_OBJECT JsonObj,\r | |
| 555 | IN CONST CHAR8 *Key,\r | |
| 556 | IN EDKII_JSON_VALUE Json\r | |
| 557 | );\r | |
| 558 | \r | |
| 559 | /**\r | |
| 560 | The function is used to get the number of elements in a JSON array. Returns or 0 if JsonArray\r | |
| 561 | is NULL or not a JSON array.\r | |
| 562 | \r | |
| 563 | @param[in] JsonArray The provided JSON array.\r | |
| 564 | \r | |
| 565 | @retval Return the number of elements in this JSON array or 0.\r | |
| 566 | \r | |
| 567 | **/\r | |
| 568 | UINTN\r | |
| 569 | EFIAPI\r | |
| 570 | JsonArrayCount (\r | |
| 571 | IN EDKII_JSON_ARRAY JsonArray\r | |
| 572 | );\r | |
| 573 | \r | |
| 574 | /**\r | |
| 575 | The function is used to return the JSON value in the array at position index. The valid range\r | |
| 576 | for this index is from 0 to the return value of JsonArrayCount() minus 1.\r | |
| 577 | \r | |
| 578 | It only returns a reference to this value and any changes on this value will impact the\r | |
| 579 | original JSON object. If that is not expected, please call JsonValueClone() to clone it to\r | |
| 580 | use.\r | |
| 581 | \r | |
| 582 | If this array is NULL or not a JSON array, or if index is out of range, NULL will be returned.\r | |
| 583 | \r | |
| 584 | @param[in] JsonArray The provided JSON Array.\r | |
| 585 | \r | |
| 586 | @retval Return the JSON value located in the Index position or\r | |
| 587 | NULL if JsonArray is not an array or no items in the array.\r | |
| 588 | \r | |
| 589 | **/\r | |
| 590 | EDKII_JSON_VALUE\r | |
| 591 | EFIAPI\r | |
| 592 | JsonArrayGetValue (\r | |
| 593 | IN EDKII_JSON_ARRAY JsonArray,\r | |
| 594 | IN UINTN Index\r | |
| 595 | );\r | |
| 596 | \r | |
| 597 | /**\r | |
| 598 | The function is used to append a JSON value to the end of the JSON array, and grow the size of\r | |
| 599 | array by 1. The reference count of this value will be increased by 1.\r | |
| 600 | \r | |
| 601 | More details for reference count strategy can refer to the API description for JsonValueFree().\r | |
| 602 | \r | |
| 603 | @param[in] JsonArray The provided JSON object.\r | |
| 604 | @param[in] Json The JSON value to append.\r | |
| 605 | \r | |
| 606 | @retval EFI_ABORTED Some error occur and operation aborted.\r | |
| 607 | @retval EFI_SUCCESS JSON value has been appended to the end of the JSON array.\r | |
| 608 | \r | |
| 609 | **/\r | |
| 610 | EFI_STATUS\r | |
| 611 | EFIAPI\r | |
| 612 | JsonArrayAppendValue (\r | |
| 613 | IN EDKII_JSON_ARRAY JsonArray,\r | |
| 614 | IN EDKII_JSON_VALUE Json\r | |
| 615 | );\r | |
| 616 | \r | |
| 617 | /**\r | |
| 618 | The function is used to remove a JSON value at position index, shifting the elements after index\r | |
| 619 | one position towards the start of the array. The reference count of this value will be decreased\r | |
| 620 | by 1.\r | |
| 621 | \r | |
| 622 | More details for reference count strategy can refer to the API description for JsonValueFree().\r | |
| 623 | \r | |
| 624 | @param[in] JsonArray The provided JSON array.\r | |
| 625 | @param[in] Index The Index position before removement.\r | |
| 626 | \r | |
| 627 | @retval EFI_ABORTED Some error occur and operation aborted.\r | |
| 628 | @retval EFI_SUCCESS The JSON array has been removed at position index.\r | |
| 629 | \r | |
| 630 | **/\r | |
| 631 | EFI_STATUS\r | |
| 632 | EFIAPI\r | |
| 633 | JsonArrayRemoveValue (\r | |
| 634 | IN EDKII_JSON_ARRAY JsonArray,\r | |
| 635 | IN UINTN Index\r | |
| 636 | );\r | |
| 637 | \r | |
| 638 | /**\r | |
| 639 | Dump JSON to a buffer.\r | |
| 640 | \r | |
| 641 | @param[in] JsonValue The provided JSON value.\r | |
| 642 | @param[in] Flags The Index position before removement. The value\r | |
| 643 | could be the combination of below flags.\r | |
| 644 | - EDKII_JSON_INDENT(n)\r | |
| 645 | - EDKII_JSON_COMPACT\r | |
| 646 | - EDKII_JSON_ENSURE_ASCII\r | |
| 647 | - EDKII_JSON_SORT_KEYS\r | |
| 648 | - EDKII_JSON_PRESERVE_ORDER\r | |
| 649 | - EDKII_JSON_ENCODE_ANY\r | |
| 650 | - EDKII_JSON_ESCAPE_SLASH\r | |
| 651 | - EDKII_JSON_REAL_PRECISION(n)\r | |
| 652 | - EDKII_JSON_EMBED\r | |
| 653 | See below URI for the JSON encoding flags reference.\r | |
| 654 | https://jansson.readthedocs.io/en/2.13/apiref.html#encoding\r | |
| 655 | \r | |
| 656 | @retval CHAR8 * Dump fail if NULL returned, otherwise the buffer\r | |
| 657 | contain JSON paylaod in ASCII string. The return\r | |
| 658 | value must be freed by the caller FreePool().\r | |
| 659 | **/\r | |
| 660 | CHAR8 *\r | |
| 661 | EFIAPI\r | |
| 662 | JsonDumpString (\r | |
| 663 | IN EDKII_JSON_VALUE JsonValue,\r | |
| 664 | IN UINTN Flags\r | |
| 665 | );\r | |
| 666 | \r | |
| 5d7b5cd1 AC |
667 | /**\r |
| 668 | Convert a string to JSON object.\r | |
| 669 | The function is used to convert a NULL terminated CHAR8 string to a JSON\r | |
| 670 | value. Only object and array represented strings can be converted successfully,\r | |
| 671 | since they are the only valid root values of a JSON text for UEFI usage.\r | |
| 672 | \r | |
| 673 | Real number and number with exponent part are not supportted by UEFI.\r | |
| 674 | \r | |
| 675 | Caller needs to cleanup the root value by calling JsonValueFree().\r | |
| 676 | \r | |
| 677 | @param[in] String The NULL terminated CHAR8 string to convert.\r | |
| 678 | \r | |
| 679 | @retval Array JSON value or object JSON value, or NULL when any error occurs.\r | |
| 680 | \r | |
| 681 | **/\r | |
| 682 | EDKII_JSON_VALUE\r | |
| 683 | EFIAPI\r | |
| 684 | JsonLoadString (\r | |
| 685 | IN CONST CHAR8* String\r | |
| 686 | );\r | |
| 687 | \r | |
| ea830b96 AC |
688 | /**\r |
| 689 | Load JSON from a buffer.\r | |
| 690 | \r | |
| 691 | @param[in] Buffer Bufffer to the JSON payload\r | |
| 692 | @param[in] BufferLen Length of the buffer\r | |
| 693 | @param[in] Flags Flag of loading JSON buffer, the value\r | |
| 694 | could be the combination of below flags.\r | |
| 695 | - EDKII_JSON_REJECT_DUPLICATES\r | |
| 696 | - EDKII_JSON_DISABLE_EOF_CHECK\r | |
| 697 | - EDKII_JSON_DECODE_ANY\r | |
| 698 | - EDKII_JSON_DECODE_INT_AS_REAL\r | |
| 699 | - EDKII_JSON_ALLOW_NUL\r | |
| 700 | See below URI for the JSON encoding flags reference.\r | |
| 701 | https://jansson.readthedocs.io/en/2.13/apiref.html?highlight=json_loadb#decoding\r | |
| 702 | \r | |
| 703 | @param[in,out] Error Pointer EDKII_JSON_ERROR structure\r | |
| 704 | \r | |
| 705 | @retval EDKII_JSON_VALUE NULL means fail to load JSON payload.\r | |
| 706 | **/\r | |
| 707 | EDKII_JSON_VALUE\r | |
| 708 | EFIAPI\r | |
| 709 | JsonLoadBuffer (\r | |
| 710 | IN CONST CHAR8 *Buffer,\r | |
| 711 | IN UINTN BufferLen,\r | |
| 712 | IN UINTN Flags,\r | |
| 713 | IN OUT EDKII_JSON_ERROR *Error\r | |
| 714 | );\r | |
| 715 | \r | |
| 716 | /**\r | |
| 717 | The reference count is used to track whether a value is still in use or not.\r | |
| 718 | When a value is created, it's reference count is set to 1.\r | |
| 719 | when the value is no longer needed, the reference count is decremented.\r | |
| 720 | When the reference count drops to zero, there are no references left and the\r | |
| 721 | value can be destroyed.\r | |
| 722 | \r | |
| 723 | This funciton decrement the reference count of EDKII_JSON_VALUE. As soon as\r | |
| 724 | a call to json_decref() drops the reference count to zero, the value is\r | |
| 725 | destroyed and it can no longer be used.\r | |
| 726 | \r | |
| 727 | @param[in] JsonValue JSON value\r | |
| 728 | **/\r | |
| 729 | VOID\r | |
| 730 | EFIAPI\r | |
| 731 | JsonDecreaseReference (\r | |
| 732 | IN EDKII_JSON_VALUE JsonValue\r | |
| 733 | );\r | |
| 734 | \r | |
| 735 | /**\r | |
| 736 | The reference count is used to track whether a value is still in use or not.\r | |
| 737 | When a value is created, it's reference count is set to 1.\r | |
| 738 | If a reference to a value is kept (e.g. a value is stored somewhere for later use),\r | |
| 739 | its reference count is incremented.\r | |
| 740 | \r | |
| 741 | This function increment the reference count of json if it's not NULL.\r | |
| 742 | Returns EDKII_JSON_VALUE.\r | |
| 743 | \r | |
| 744 | @param[in] JsonValue JSON value\r | |
| 745 | @retval EDKII_JSON_VALUE of itself\r | |
| 746 | **/\r | |
| 747 | EDKII_JSON_VALUE\r | |
| 748 | EFIAPI\r | |
| 749 | JsonIncreaseReference (\r | |
| 750 | IN EDKII_JSON_VALUE JsonValue\r | |
| 751 | );\r | |
| 752 | /**\r | |
| 753 | Returns an opaque iterator which can be used to iterate over all key-value pairs\r | |
| 754 | in object, or NULL if object is empty\r | |
| 755 | \r | |
| 756 | @param[in] JsonValue JSON value\r | |
| 757 | **/\r | |
| 758 | VOID *\r | |
| 759 | EFIAPI\r | |
| 760 | JsonObjectIterator (\r | |
| 761 | IN EDKII_JSON_VALUE JsonValue\r | |
| 762 | );\r | |
| 763 | \r | |
| 764 | /**\r | |
| 765 | Extract the associated value from iterator.\r | |
| 766 | \r | |
| 767 | @param[in] Iterator Iterator pointer\r | |
| 768 | **/\r | |
| 769 | EDKII_JSON_VALUE\r | |
| 770 | EFIAPI\r | |
| 771 | JsonObjectIteratorValue (\r | |
| 772 | IN VOID *Iterator\r | |
| 773 | );\r | |
| 774 | \r | |
| 775 | /**\r | |
| 776 | Returns an iterator pointing to the next key-value pair in object after iter,\r | |
| 777 | or NULL if the whole object has been iterated through.\r | |
| 778 | \r | |
| 779 | @param[in] JsonValue JSON value\r | |
| 780 | @param[in] Iterator Iterator pointer\r | |
| 781 | @retval Iterator pointer\r | |
| 782 | **/\r | |
| 783 | VOID *\r | |
| 784 | JsonObjectIteratorNext (\r | |
| 785 | IN EDKII_JSON_VALUE JsonValue,\r | |
| 786 | IN VOID *Iterator\r | |
| 787 | );\r | |
| 788 | \r | |
| 789 | /**\r | |
| 790 | Returns the json type of this json value\r | |
| 791 | \r | |
| 792 | @param[in] JsonValue JSON value\r | |
| 793 | @retval JSON type returned\r | |
| 794 | **/\r | |
| 795 | EDKII_JSON_TYPE\r | |
| 796 | EFIAPI\r | |
| 797 | JsonGetType(\r | |
| 798 | IN EDKII_JSON_VALUE JsonValue\r | |
| 799 | );\r | |
| 800 | #endif\r |