| 1 | // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. |
| 2 | |
| 3 | #include "precomp.h" |
| 4 | |
| 5 | |
| 6 | // Exit macros |
| 7 | #define JsonExitOnLastError(x, s, ...) ExitOnLastErrorSource(DUTIL_SOURCE_JSONUTIL, x, s, __VA_ARGS__) |
| 8 | #define JsonExitOnLastErrorDebugTrace(x, s, ...) ExitOnLastErrorDebugTraceSource(DUTIL_SOURCE_JSONUTIL, x, s, __VA_ARGS__) |
| 9 | #define JsonExitWithLastError(x, s, ...) ExitWithLastErrorSource(DUTIL_SOURCE_JSONUTIL, x, s, __VA_ARGS__) |
| 10 | #define JsonExitOnFailure(x, s, ...) ExitOnFailureSource(DUTIL_SOURCE_JSONUTIL, x, s, __VA_ARGS__) |
| 11 | #define JsonExitOnRootFailure(x, s, ...) ExitOnRootFailureSource(DUTIL_SOURCE_JSONUTIL, x, s, __VA_ARGS__) |
| 12 | #define JsonExitOnFailureDebugTrace(x, s, ...) ExitOnFailureDebugTraceSource(DUTIL_SOURCE_JSONUTIL, x, s, __VA_ARGS__) |
| 13 | #define JsonExitOnNull(p, x, e, s, ...) ExitOnNullSource(DUTIL_SOURCE_JSONUTIL, p, x, e, s, __VA_ARGS__) |
| 14 | #define JsonExitOnNullWithLastError(p, x, s, ...) ExitOnNullWithLastErrorSource(DUTIL_SOURCE_JSONUTIL, p, x, s, __VA_ARGS__) |
| 15 | #define JsonExitOnNullDebugTrace(p, x, e, s, ...) ExitOnNullDebugTraceSource(DUTIL_SOURCE_JSONUTIL, p, x, e, s, __VA_ARGS__) |
| 16 | #define JsonExitOnInvalidHandleWithLastError(p, x, s, ...) ExitOnInvalidHandleWithLastErrorSource(DUTIL_SOURCE_JSONUTIL, p, x, s, __VA_ARGS__) |
| 17 | #define JsonExitOnWin32Error(e, x, s, ...) ExitOnWin32ErrorSource(DUTIL_SOURCE_JSONUTIL, e, x, s, __VA_ARGS__) |
| 18 | #define JsonExitOnGdipFailure(g, x, s, ...) ExitOnGdipFailureSource(DUTIL_SOURCE_JSONUTIL, g, x, s, __VA_ARGS__) |
| 19 | |
| 20 | const DWORD JSON_STACK_INCREMENT = 5; |
| 21 | |
| 22 | // Prototypes |
| 23 | static HRESULT DoStart( |
| 24 | __in JSON_WRITER* pWriter, |
| 25 | __in JSON_TOKEN tokenStart, |
| 26 | __in_z LPCWSTR wzStartString |
| 27 | ); |
| 28 | static HRESULT DoEnd( |
| 29 | __in JSON_WRITER* pWriter, |
| 30 | __in JSON_TOKEN tokenEnd, |
| 31 | __in_z LPCWSTR wzEndString |
| 32 | ); |
| 33 | static HRESULT DoKey( |
| 34 | __in JSON_WRITER* pWriter, |
| 35 | __in_z LPCWSTR wzKey |
| 36 | ); |
| 37 | static HRESULT DoValue( |
| 38 | __in JSON_WRITER* pWriter, |
| 39 | __in_z_opt LPCWSTR wzValue |
| 40 | ); |
| 41 | static HRESULT EnsureTokenStack( |
| 42 | __in JSON_WRITER* pWriter |
| 43 | ); |
| 44 | static HRESULT SerializeJsonString( |
| 45 | __out_z LPWSTR* psczJsonString, |
| 46 | __in_z LPCWSTR wzString |
| 47 | ); |
| 48 | |
| 49 | |
| 50 | |
| 51 | DAPI_(HRESULT) JsonInitializeReader( |
| 52 | __in_z LPCWSTR wzJson, |
| 53 | __in JSON_READER* pReader |
| 54 | ) |
| 55 | { |
| 56 | HRESULT hr = S_OK; |
| 57 | |
| 58 | memset(pReader, 0, sizeof(JSON_READER)); |
| 59 | ::InitializeCriticalSection(&pReader->cs); |
| 60 | |
| 61 | hr = StrAllocString(&pReader->sczJson, wzJson, 0); |
| 62 | JsonExitOnFailure(hr, "Failed to allocate json string."); |
| 63 | |
| 64 | pReader->pwz = pReader->sczJson; |
| 65 | |
| 66 | LExit: |
| 67 | return hr; |
| 68 | } |
| 69 | |
| 70 | |
| 71 | DAPI_(void) JsonUninitializeReader( |
| 72 | __in JSON_READER* pReader |
| 73 | ) |
| 74 | { |
| 75 | ReleaseStr(pReader->sczJson); |
| 76 | |
| 77 | ::DeleteCriticalSection(&pReader->cs); |
| 78 | memset(pReader, 0, sizeof(JSON_READER)); |
| 79 | } |
| 80 | |
| 81 | |
| 82 | static HRESULT NextToken( |
| 83 | __in JSON_READER* pReader, |
| 84 | __out JSON_TOKEN* pToken |
| 85 | ) |
| 86 | { |
| 87 | HRESULT hr = S_OK; |
| 88 | |
| 89 | // Skip whitespace. |
| 90 | while (L' ' == *pReader->pwz || |
| 91 | L'\t' == *pReader->pwz || |
| 92 | L'\r' == *pReader->pwz || |
| 93 | L'\n' == *pReader->pwz || |
| 94 | L',' == *pReader->pwz) |
| 95 | { |
| 96 | ++pReader->pwz; |
| 97 | } |
| 98 | |
| 99 | switch (*pReader->pwz) |
| 100 | { |
| 101 | case L'{': |
| 102 | *pToken = JSON_TOKEN_OBJECT_START; |
| 103 | break; |
| 104 | |
| 105 | case L':': // begin object value |
| 106 | *pToken = JSON_TOKEN_OBJECT_VALUE; |
| 107 | break; |
| 108 | |
| 109 | case L'}': // end object |
| 110 | *pToken = JSON_TOKEN_OBJECT_END; |
| 111 | break; |
| 112 | |
| 113 | case L'[': // begin array |
| 114 | *pToken = JSON_TOKEN_ARRAY_START; |
| 115 | break; |
| 116 | |
| 117 | case L']': // end array |
| 118 | *pToken = JSON_TOKEN_ARRAY_END; |
| 119 | break; |
| 120 | |
| 121 | case L'"': // string |
| 122 | *pToken = JSON_TOKEN_OBJECT_START == *pToken ? JSON_TOKEN_VALUE : JSON_TOKEN_OBJECT_KEY; |
| 123 | break; |
| 124 | |
| 125 | case L't': // true |
| 126 | case L'f': // false |
| 127 | case L'n': // null |
| 128 | case L'-': // number |
| 129 | case L'0': |
| 130 | case L'1': |
| 131 | case L'2': |
| 132 | case L'3': |
| 133 | case L'4': |
| 134 | case L'5': |
| 135 | case L'6': |
| 136 | case L'7': |
| 137 | case L'8': |
| 138 | case L'9': |
| 139 | *pToken = JSON_TOKEN_VALUE; |
| 140 | break; |
| 141 | |
| 142 | case L'\0': |
| 143 | hr = E_NOMOREITEMS; |
| 144 | break; |
| 145 | |
| 146 | default: |
| 147 | hr = E_INVALIDSTATE; |
| 148 | } |
| 149 | |
| 150 | return hr; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | DAPI_(HRESULT) JsonReadNext( |
| 155 | __in JSON_READER* pReader, |
| 156 | __out JSON_TOKEN* pToken, |
| 157 | __out JSON_VALUE* pValue |
| 158 | ) |
| 159 | { |
| 160 | HRESULT hr = S_OK; |
| 161 | //WCHAR wz; |
| 162 | //JSON_TOKEN token = JSON_TOKEN_NONE; |
| 163 | |
| 164 | ::EnterCriticalSection(&pReader->cs); |
| 165 | |
| 166 | hr = NextToken(pReader, pToken); |
| 167 | if (E_NOMOREITEMS == hr) |
| 168 | { |
| 169 | ExitFunction(); |
| 170 | } |
| 171 | JsonExitOnFailure(hr, "Failed to get next token."); |
| 172 | |
| 173 | if (JSON_TOKEN_VALUE == *pToken) |
| 174 | { |
| 175 | hr = JsonReadValue(pReader, pValue); |
| 176 | } |
| 177 | else |
| 178 | { |
| 179 | ++pReader->pwz; |
| 180 | } |
| 181 | |
| 182 | LExit: |
| 183 | ::LeaveCriticalSection(&pReader->cs); |
| 184 | return hr; |
| 185 | } |
| 186 | |
| 187 | |
| 188 | DAPI_(HRESULT) JsonReadValue( |
| 189 | __in JSON_READER* /*pReader*/, |
| 190 | __in JSON_VALUE* /*pValue*/ |
| 191 | ) |
| 192 | { |
| 193 | HRESULT hr = S_OK; |
| 194 | |
| 195 | //LExit: |
| 196 | return hr; |
| 197 | } |
| 198 | |
| 199 | |
| 200 | DAPI_(HRESULT) JsonInitializeWriter( |
| 201 | __in JSON_WRITER* pWriter |
| 202 | ) |
| 203 | { |
| 204 | memset(pWriter, 0, sizeof(JSON_WRITER)); |
| 205 | ::InitializeCriticalSection(&pWriter->cs); |
| 206 | |
| 207 | return S_OK; |
| 208 | } |
| 209 | |
| 210 | |
| 211 | DAPI_(void) JsonUninitializeWriter( |
| 212 | __in JSON_WRITER* pWriter |
| 213 | ) |
| 214 | { |
| 215 | ReleaseMem(pWriter->rgTokenStack); |
| 216 | ReleaseStr(pWriter->sczJson); |
| 217 | |
| 218 | ::DeleteCriticalSection(&pWriter->cs); |
| 219 | memset(pWriter, 0, sizeof(JSON_WRITER)); |
| 220 | } |
| 221 | |
| 222 | |
| 223 | DAPI_(HRESULT) JsonWriteBool( |
| 224 | __in JSON_WRITER* pWriter, |
| 225 | __in BOOL fValue |
| 226 | ) |
| 227 | { |
| 228 | HRESULT hr = S_OK; |
| 229 | LPWSTR sczValue = NULL; |
| 230 | |
| 231 | hr = StrAllocString(&sczValue, fValue ? L"true" : L"false", 0); |
| 232 | JsonExitOnFailure(hr, "Failed to convert boolean to string."); |
| 233 | |
| 234 | hr = DoValue(pWriter, sczValue); |
| 235 | JsonExitOnFailure(hr, "Failed to add boolean to JSON."); |
| 236 | |
| 237 | LExit: |
| 238 | ReleaseStr(sczValue); |
| 239 | return hr; |
| 240 | } |
| 241 | |
| 242 | |
| 243 | DAPI_(HRESULT) JsonWriteNumber( |
| 244 | __in JSON_WRITER* pWriter, |
| 245 | __in DWORD dwValue |
| 246 | ) |
| 247 | { |
| 248 | HRESULT hr = S_OK; |
| 249 | LPWSTR sczValue = NULL; |
| 250 | |
| 251 | hr = StrAllocFormatted(&sczValue, L"%u", dwValue); |
| 252 | JsonExitOnFailure(hr, "Failed to convert number to string."); |
| 253 | |
| 254 | hr = DoValue(pWriter, sczValue); |
| 255 | JsonExitOnFailure(hr, "Failed to add number to JSON."); |
| 256 | |
| 257 | LExit: |
| 258 | ReleaseStr(sczValue); |
| 259 | return hr; |
| 260 | } |
| 261 | |
| 262 | |
| 263 | DAPI_(HRESULT) JsonWriteString( |
| 264 | __in JSON_WRITER* pWriter, |
| 265 | __in_z LPCWSTR wzValue |
| 266 | ) |
| 267 | { |
| 268 | HRESULT hr = S_OK; |
| 269 | LPWSTR sczJsonString = NULL; |
| 270 | |
| 271 | hr = SerializeJsonString(&sczJsonString, wzValue); |
| 272 | JsonExitOnFailure(hr, "Failed to allocate string JSON."); |
| 273 | |
| 274 | hr = DoValue(pWriter, sczJsonString); |
| 275 | JsonExitOnFailure(hr, "Failed to add string to JSON."); |
| 276 | |
| 277 | LExit: |
| 278 | ReleaseStr(sczJsonString); |
| 279 | return hr; |
| 280 | } |
| 281 | |
| 282 | |
| 283 | DAPI_(HRESULT) JsonWriteArrayStart( |
| 284 | __in JSON_WRITER* pWriter |
| 285 | ) |
| 286 | { |
| 287 | HRESULT hr = S_OK; |
| 288 | |
| 289 | hr = DoStart(pWriter, JSON_TOKEN_ARRAY_START, L"["); |
| 290 | JsonExitOnFailure(hr, "Failed to start JSON array."); |
| 291 | |
| 292 | LExit: |
| 293 | return hr; |
| 294 | } |
| 295 | |
| 296 | |
| 297 | DAPI_(HRESULT) JsonWriteArrayEnd( |
| 298 | __in JSON_WRITER* pWriter |
| 299 | ) |
| 300 | { |
| 301 | HRESULT hr = S_OK; |
| 302 | |
| 303 | hr = DoEnd(pWriter, JSON_TOKEN_ARRAY_END, L"]"); |
| 304 | JsonExitOnFailure(hr, "Failed to end JSON array."); |
| 305 | |
| 306 | LExit: |
| 307 | return hr; |
| 308 | } |
| 309 | |
| 310 | |
| 311 | DAPI_(HRESULT) JsonWriteObjectStart( |
| 312 | __in JSON_WRITER* pWriter |
| 313 | ) |
| 314 | { |
| 315 | HRESULT hr = S_OK; |
| 316 | |
| 317 | hr = DoStart(pWriter, JSON_TOKEN_OBJECT_START, L"{"); |
| 318 | JsonExitOnFailure(hr, "Failed to start JSON object."); |
| 319 | |
| 320 | LExit: |
| 321 | return hr; |
| 322 | } |
| 323 | |
| 324 | |
| 325 | DAPI_(HRESULT) JsonWriteObjectKey( |
| 326 | __in JSON_WRITER* pWriter, |
| 327 | __in_z LPCWSTR wzKey |
| 328 | ) |
| 329 | { |
| 330 | HRESULT hr = S_OK; |
| 331 | LPWSTR sczObjectKey = NULL; |
| 332 | |
| 333 | hr = StrAllocFormatted(&sczObjectKey, L"\"%ls\":", wzKey); |
| 334 | JsonExitOnFailure(hr, "Failed to allocate JSON object key."); |
| 335 | |
| 336 | hr = DoKey(pWriter, sczObjectKey); |
| 337 | JsonExitOnFailure(hr, "Failed to add object key to JSON."); |
| 338 | |
| 339 | LExit: |
| 340 | ReleaseStr(sczObjectKey); |
| 341 | return hr; |
| 342 | } |
| 343 | |
| 344 | |
| 345 | DAPI_(HRESULT) JsonWriteObjectEnd( |
| 346 | __in JSON_WRITER* pWriter |
| 347 | ) |
| 348 | { |
| 349 | HRESULT hr = S_OK; |
| 350 | |
| 351 | hr = DoEnd(pWriter, JSON_TOKEN_OBJECT_END, L"}"); |
| 352 | JsonExitOnFailure(hr, "Failed to end JSON object."); |
| 353 | |
| 354 | LExit: |
| 355 | return hr; |
| 356 | } |
| 357 | |
| 358 | |
| 359 | static HRESULT DoStart( |
| 360 | __in JSON_WRITER* pWriter, |
| 361 | __in JSON_TOKEN tokenStart, |
| 362 | __in_z LPCWSTR wzStartString |
| 363 | ) |
| 364 | { |
| 365 | Assert(JSON_TOKEN_ARRAY_START == tokenStart || JSON_TOKEN_OBJECT_START == tokenStart); |
| 366 | |
| 367 | HRESULT hr = S_OK; |
| 368 | JSON_TOKEN token = JSON_TOKEN_NONE; |
| 369 | BOOL fNeedComma = FALSE; |
| 370 | BOOL fPushToken = TRUE; |
| 371 | |
| 372 | ::EnterCriticalSection(&pWriter->cs); |
| 373 | |
| 374 | hr = EnsureTokenStack(pWriter); |
| 375 | JsonExitOnFailure(hr, "Failed to ensure token stack for start."); |
| 376 | |
| 377 | token = pWriter->rgTokenStack[pWriter->cTokens - 1]; |
| 378 | switch (token) |
| 379 | { |
| 380 | case JSON_TOKEN_NONE: |
| 381 | token = tokenStart; |
| 382 | fPushToken = FALSE; |
| 383 | break; |
| 384 | |
| 385 | case JSON_TOKEN_ARRAY_START: // array start changes to array value. |
| 386 | token = JSON_TOKEN_ARRAY_VALUE; |
| 387 | break; |
| 388 | |
| 389 | case JSON_TOKEN_ARRAY_VALUE: |
| 390 | case JSON_TOKEN_ARRAY_END: |
| 391 | case JSON_TOKEN_OBJECT_END: |
| 392 | fNeedComma = TRUE; |
| 393 | break; |
| 394 | |
| 395 | default: // everything else is not allowed. |
| 396 | hr = E_UNEXPECTED; |
| 397 | break; |
| 398 | } |
| 399 | JsonExitOnRootFailure(hr, "Cannot start array or object to JSON serializer now."); |
| 400 | |
| 401 | if (fNeedComma) |
| 402 | { |
| 403 | hr = StrAllocConcat(&pWriter->sczJson, L",", 0); |
| 404 | JsonExitOnFailure(hr, "Failed to add comma for start array or object to JSON."); |
| 405 | } |
| 406 | |
| 407 | hr = StrAllocConcat(&pWriter->sczJson, wzStartString, 0); |
| 408 | JsonExitOnFailure(hr, "Failed to start JSON array or object."); |
| 409 | |
| 410 | pWriter->rgTokenStack[pWriter->cTokens - 1] = token; |
| 411 | if (fPushToken) |
| 412 | { |
| 413 | pWriter->rgTokenStack[pWriter->cTokens] = tokenStart; |
| 414 | ++pWriter->cTokens; |
| 415 | } |
| 416 | |
| 417 | LExit: |
| 418 | ::LeaveCriticalSection(&pWriter->cs); |
| 419 | return hr; |
| 420 | } |
| 421 | |
| 422 | |
| 423 | static HRESULT DoEnd( |
| 424 | __in JSON_WRITER* pWriter, |
| 425 | __in JSON_TOKEN tokenEnd, |
| 426 | __in_z LPCWSTR wzEndString |
| 427 | ) |
| 428 | { |
| 429 | HRESULT hr = S_OK; |
| 430 | |
| 431 | ::EnterCriticalSection(&pWriter->cs); |
| 432 | |
| 433 | if (!pWriter->rgTokenStack || 0 == pWriter->cTokens) |
| 434 | { |
| 435 | hr = E_UNEXPECTED; |
| 436 | JsonExitOnRootFailure(hr, "Failure to pop token because the stack is empty."); |
| 437 | } |
| 438 | else |
| 439 | { |
| 440 | JSON_TOKEN token = pWriter->rgTokenStack[pWriter->cTokens - 1]; |
| 441 | if ((JSON_TOKEN_ARRAY_END == tokenEnd && JSON_TOKEN_ARRAY_START != token && JSON_TOKEN_ARRAY_VALUE != token) || |
| 442 | (JSON_TOKEN_OBJECT_END == tokenEnd && JSON_TOKEN_OBJECT_START != token && JSON_TOKEN_OBJECT_VALUE != token)) |
| 443 | { |
| 444 | hr = E_UNEXPECTED; |
| 445 | JsonExitOnRootFailure(hr, "Failure to pop token because the stack did not match the expected token: %d", tokenEnd); |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | hr = StrAllocConcat(&pWriter->sczJson, wzEndString, 0); |
| 450 | JsonExitOnFailure(hr, "Failed to end JSON array or object."); |
| 451 | |
| 452 | --pWriter->cTokens; |
| 453 | |
| 454 | LExit: |
| 455 | ::LeaveCriticalSection(&pWriter->cs); |
| 456 | return hr; |
| 457 | } |
| 458 | |
| 459 | |
| 460 | static HRESULT DoKey( |
| 461 | __in JSON_WRITER* pWriter, |
| 462 | __in_z LPCWSTR wzKey |
| 463 | ) |
| 464 | { |
| 465 | HRESULT hr = S_OK; |
| 466 | JSON_TOKEN token = JSON_TOKEN_NONE; |
| 467 | BOOL fNeedComma = FALSE; |
| 468 | |
| 469 | ::EnterCriticalSection(&pWriter->cs); |
| 470 | |
| 471 | hr = EnsureTokenStack(pWriter); |
| 472 | JsonExitOnFailure(hr, "Failed to ensure token stack for key."); |
| 473 | |
| 474 | token = pWriter->rgTokenStack[pWriter->cTokens - 1]; |
| 475 | switch (token) |
| 476 | { |
| 477 | case JSON_TOKEN_OBJECT_START: |
| 478 | token = JSON_TOKEN_OBJECT_KEY; |
| 479 | break; |
| 480 | |
| 481 | case JSON_TOKEN_OBJECT_VALUE: |
| 482 | token = JSON_TOKEN_OBJECT_KEY; |
| 483 | fNeedComma = TRUE; |
| 484 | break; |
| 485 | |
| 486 | default: // everything else is not allowed. |
| 487 | hr = E_UNEXPECTED; |
| 488 | break; |
| 489 | } |
| 490 | JsonExitOnRootFailure(hr, "Cannot add key to JSON serializer now."); |
| 491 | |
| 492 | if (fNeedComma) |
| 493 | { |
| 494 | hr = StrAllocConcat(&pWriter->sczJson, L",", 0); |
| 495 | JsonExitOnFailure(hr, "Failed to add comma for key to JSON."); |
| 496 | } |
| 497 | |
| 498 | hr = StrAllocConcat(&pWriter->sczJson, wzKey, 0); |
| 499 | JsonExitOnFailure(hr, "Failed to add key to JSON."); |
| 500 | |
| 501 | pWriter->rgTokenStack[pWriter->cTokens - 1] = token; |
| 502 | |
| 503 | LExit: |
| 504 | ::LeaveCriticalSection(&pWriter->cs); |
| 505 | return hr; |
| 506 | } |
| 507 | |
| 508 | |
| 509 | static HRESULT DoValue( |
| 510 | __in JSON_WRITER* pWriter, |
| 511 | __in_z_opt LPCWSTR wzValue |
| 512 | ) |
| 513 | { |
| 514 | HRESULT hr = S_OK; |
| 515 | JSON_TOKEN token = JSON_TOKEN_NONE; |
| 516 | BOOL fNeedComma = FALSE; |
| 517 | |
| 518 | ::EnterCriticalSection(&pWriter->cs); |
| 519 | |
| 520 | hr = EnsureTokenStack(pWriter); |
| 521 | JsonExitOnFailure(hr, "Failed to ensure token stack for value."); |
| 522 | |
| 523 | token = pWriter->rgTokenStack[pWriter->cTokens - 1]; |
| 524 | switch (token) |
| 525 | { |
| 526 | case JSON_TOKEN_ARRAY_START: |
| 527 | token = JSON_TOKEN_ARRAY_VALUE; |
| 528 | break; |
| 529 | |
| 530 | case JSON_TOKEN_ARRAY_VALUE: |
| 531 | fNeedComma = TRUE; |
| 532 | break; |
| 533 | |
| 534 | case JSON_TOKEN_OBJECT_KEY: |
| 535 | token = JSON_TOKEN_OBJECT_VALUE; |
| 536 | break; |
| 537 | |
| 538 | case JSON_TOKEN_NONE: |
| 539 | token = JSON_TOKEN_VALUE; |
| 540 | break; |
| 541 | |
| 542 | default: // everything else is not allowed. |
| 543 | hr = E_UNEXPECTED; |
| 544 | break; |
| 545 | } |
| 546 | JsonExitOnRootFailure(hr, "Cannot add value to JSON serializer now."); |
| 547 | |
| 548 | if (fNeedComma) |
| 549 | { |
| 550 | hr = StrAllocConcat(&pWriter->sczJson, L",", 0); |
| 551 | JsonExitOnFailure(hr, "Failed to add comma for value to JSON."); |
| 552 | } |
| 553 | |
| 554 | if (wzValue) |
| 555 | { |
| 556 | hr = StrAllocConcat(&pWriter->sczJson, wzValue, 0); |
| 557 | JsonExitOnFailure(hr, "Failed to add value to JSON."); |
| 558 | } |
| 559 | else |
| 560 | { |
| 561 | hr = StrAllocConcat(&pWriter->sczJson, L"null", 0); |
| 562 | JsonExitOnFailure(hr, "Failed to add null value to JSON."); |
| 563 | } |
| 564 | |
| 565 | pWriter->rgTokenStack[pWriter->cTokens - 1] = token; |
| 566 | |
| 567 | LExit: |
| 568 | ::LeaveCriticalSection(&pWriter->cs); |
| 569 | return hr; |
| 570 | } |
| 571 | |
| 572 | |
| 573 | static HRESULT EnsureTokenStack( |
| 574 | __in JSON_WRITER* pWriter |
| 575 | ) |
| 576 | { |
| 577 | HRESULT hr = S_OK; |
| 578 | DWORD cNumAlloc = pWriter->cTokens != 0 ? pWriter->cTokens : 0; |
| 579 | |
| 580 | hr = MemEnsureArraySize(reinterpret_cast<LPVOID*>(&pWriter->rgTokenStack), cNumAlloc, sizeof(JSON_TOKEN), JSON_STACK_INCREMENT); |
| 581 | JsonExitOnFailure(hr, "Failed to allocate JSON token stack."); |
| 582 | |
| 583 | if (0 == pWriter->cTokens) |
| 584 | { |
| 585 | pWriter->rgTokenStack[0] = JSON_TOKEN_NONE; |
| 586 | ++pWriter->cTokens; |
| 587 | } |
| 588 | |
| 589 | LExit: |
| 590 | return hr; |
| 591 | } |
| 592 | |
| 593 | |
| 594 | static HRESULT SerializeJsonString( |
| 595 | __out_z LPWSTR* psczJsonString, |
| 596 | __in_z LPCWSTR wzString |
| 597 | ) |
| 598 | { |
| 599 | HRESULT hr = S_OK; |
| 600 | DWORD cchRequired = 3; // start with enough space for null terminated empty quoted string (aka: ""\0) |
| 601 | |
| 602 | for (LPCWSTR pch = wzString; *pch; ++pch) |
| 603 | { |
| 604 | // If it is a special JSON character, add space for the escape backslash. |
| 605 | if (L'"' == *pch || L'\\' == *pch || L'/' == *pch || L'\b' == *pch || L'\f' == *pch || L'\n' == *pch || L'\r' == *pch || L'\t' == *pch) |
| 606 | { |
| 607 | ++cchRequired; |
| 608 | } |
| 609 | |
| 610 | ++cchRequired; |
| 611 | } |
| 612 | |
| 613 | hr = StrAlloc(psczJsonString, cchRequired); |
| 614 | JsonExitOnFailure(hr, "Failed to allocate space for JSON string."); |
| 615 | |
| 616 | LPWSTR pchTarget = *psczJsonString; |
| 617 | |
| 618 | *pchTarget = L'\"'; |
| 619 | ++pchTarget; |
| 620 | |
| 621 | for (LPCWSTR pch = wzString; *pch; ++pch, ++pchTarget) |
| 622 | { |
| 623 | // If it is a special JSON character, handle it or just add the character as is. |
| 624 | switch (*pch) |
| 625 | { |
| 626 | case L'"': |
| 627 | *pchTarget = L'\\'; |
| 628 | ++pchTarget; |
| 629 | *pchTarget = L'"'; |
| 630 | break; |
| 631 | |
| 632 | case L'\\': |
| 633 | *pchTarget = L'\\'; |
| 634 | ++pchTarget; |
| 635 | *pchTarget = L'\\'; |
| 636 | break; |
| 637 | |
| 638 | case L'/': |
| 639 | *pchTarget = L'\\'; |
| 640 | ++pchTarget; |
| 641 | *pchTarget = L'/'; |
| 642 | break; |
| 643 | |
| 644 | case L'\b': |
| 645 | *pchTarget = L'\\'; |
| 646 | ++pchTarget; |
| 647 | *pchTarget = L'b'; |
| 648 | break; |
| 649 | |
| 650 | case L'\f': |
| 651 | *pchTarget = L'\\'; |
| 652 | ++pchTarget; |
| 653 | *pchTarget = L'f'; |
| 654 | break; |
| 655 | |
| 656 | case L'\n': |
| 657 | *pchTarget = L'\\'; |
| 658 | ++pchTarget; |
| 659 | *pchTarget = L'n'; |
| 660 | break; |
| 661 | |
| 662 | case L'\r': |
| 663 | *pchTarget = L'\\'; |
| 664 | ++pchTarget; |
| 665 | *pchTarget = L'r'; |
| 666 | break; |
| 667 | |
| 668 | case L'\t': |
| 669 | *pchTarget = L'\\'; |
| 670 | ++pchTarget; |
| 671 | *pchTarget = L't'; |
| 672 | break; |
| 673 | |
| 674 | default: |
| 675 | *pchTarget = *pch; |
| 676 | break; |
| 677 | } |
| 678 | |
| 679 | } |
| 680 | |
| 681 | *pchTarget = L'\"'; |
| 682 | ++pchTarget; |
| 683 | *pchTarget = L'\0'; |
| 684 | |
| 685 | LExit: |
| 686 | return hr; |
| 687 | } |