| 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 BuffExitOnLastError(x, s, ...) ExitOnLastErrorSource(DUTIL_SOURCE_BUFFUTIL, x, s, __VA_ARGS__) |
| 8 | #define BuffExitOnLastErrorDebugTrace(x, s, ...) ExitOnLastErrorDebugTraceSource(DUTIL_SOURCE_BUFFUTIL, x, s, __VA_ARGS__) |
| 9 | #define BuffExitWithLastError(x, s, ...) ExitWithLastErrorSource(DUTIL_SOURCE_BUFFUTIL, x, s, __VA_ARGS__) |
| 10 | #define BuffExitOnFailure(x, s, ...) ExitOnFailureSource(DUTIL_SOURCE_BUFFUTIL, x, s, __VA_ARGS__) |
| 11 | #define BuffExitOnRootFailure(x, s, ...) ExitOnRootFailureSource(DUTIL_SOURCE_BUFFUTIL, x, s, __VA_ARGS__) |
| 12 | #define BuffExitOnFailureDebugTrace(x, s, ...) ExitOnFailureDebugTraceSource(DUTIL_SOURCE_BUFFUTIL, x, s, __VA_ARGS__) |
| 13 | #define BuffExitOnNull(p, x, e, s, ...) ExitOnNullSource(DUTIL_SOURCE_BUFFUTIL, p, x, e, s, __VA_ARGS__) |
| 14 | #define BuffExitOnNullWithLastError(p, x, s, ...) ExitOnNullWithLastErrorSource(DUTIL_SOURCE_BUFFUTIL, p, x, s, __VA_ARGS__) |
| 15 | #define BuffExitOnNullDebugTrace(p, x, e, s, ...) ExitOnNullDebugTraceSource(DUTIL_SOURCE_BUFFUTIL, p, x, e, s, __VA_ARGS__) |
| 16 | #define BuffExitOnInvalidHandleWithLastError(p, x, s, ...) ExitOnInvalidHandleWithLastErrorSource(DUTIL_SOURCE_BUFFUTIL, p, x, s, __VA_ARGS__) |
| 17 | #define BuffExitOnWin32Error(e, x, s, ...) ExitOnWin32ErrorSource(DUTIL_SOURCE_BUFFUTIL, e, x, s, __VA_ARGS__) |
| 18 | #define BuffExitOnGdipFailure(g, x, s, ...) ExitOnGdipFailureSource(DUTIL_SOURCE_BUFFUTIL, g, x, s, __VA_ARGS__) |
| 19 | |
| 20 | |
| 21 | // constants |
| 22 | |
| 23 | #define BUFFER_INCREMENT 128 |
| 24 | |
| 25 | |
| 26 | // helper function declarations |
| 27 | |
| 28 | static HRESULT EnsureBufferSize( |
| 29 | __deref_inout_bcount(cbSize) BYTE** ppbBuffer, |
| 30 | __in SIZE_T cbSize |
| 31 | ); |
| 32 | |
| 33 | |
| 34 | // functions |
| 35 | |
| 36 | // Buffer read functions |
| 37 | |
| 38 | extern "C" HRESULT BuffReadNumber( |
| 39 | __in_bcount(cbBuffer) const BYTE* pbBuffer, |
| 40 | __in SIZE_T cbBuffer, |
| 41 | __inout SIZE_T* piBuffer, |
| 42 | __out DWORD* pdw |
| 43 | ) |
| 44 | { |
| 45 | Assert(pbBuffer); |
| 46 | Assert(piBuffer); |
| 47 | Assert(pdw); |
| 48 | |
| 49 | HRESULT hr = S_OK; |
| 50 | SIZE_T cbAvailable = 0; |
| 51 | |
| 52 | // get availiable data size |
| 53 | hr = ::SIZETSub(cbBuffer, *piBuffer, &cbAvailable); |
| 54 | BuffExitOnRootFailure(hr, "Failed to calculate available data size."); |
| 55 | |
| 56 | // verify buffer size |
| 57 | if (sizeof(DWORD) > cbAvailable) |
| 58 | { |
| 59 | hr = E_INVALIDARG; |
| 60 | BuffExitOnRootFailure(hr, "Buffer too small to read number. cbAvailable: %u", cbAvailable); |
| 61 | } |
| 62 | |
| 63 | *pdw = *(const DWORD*)(pbBuffer + *piBuffer); |
| 64 | *piBuffer += sizeof(DWORD); |
| 65 | |
| 66 | LExit: |
| 67 | return hr; |
| 68 | } |
| 69 | |
| 70 | extern "C" HRESULT BuffReadNumber64( |
| 71 | __in_bcount(cbBuffer) const BYTE * pbBuffer, |
| 72 | __in SIZE_T cbBuffer, |
| 73 | __inout SIZE_T* piBuffer, |
| 74 | __out DWORD64* pdw64 |
| 75 | ) |
| 76 | { |
| 77 | Assert(pbBuffer); |
| 78 | Assert(piBuffer); |
| 79 | Assert(pdw64); |
| 80 | |
| 81 | HRESULT hr = S_OK; |
| 82 | SIZE_T cbAvailable = 0; |
| 83 | |
| 84 | // get availiable data size |
| 85 | hr = ::SIZETSub(cbBuffer, *piBuffer, &cbAvailable); |
| 86 | BuffExitOnRootFailure(hr, "Failed to calculate available data size."); |
| 87 | |
| 88 | // verify buffer size |
| 89 | if (sizeof(DWORD64) > cbAvailable) |
| 90 | { |
| 91 | hr = E_INVALIDARG; |
| 92 | BuffExitOnRootFailure(hr, "Buffer too small to read 64-bit number. cbAvailable: %u", cbAvailable); |
| 93 | } |
| 94 | |
| 95 | *pdw64 = *(const DWORD64*)(pbBuffer + *piBuffer); |
| 96 | *piBuffer += sizeof(DWORD64); |
| 97 | |
| 98 | LExit: |
| 99 | return hr; |
| 100 | } |
| 101 | |
| 102 | extern "C" HRESULT BuffReadPointer( |
| 103 | __in_bcount(cbBuffer) const BYTE* pbBuffer, |
| 104 | __in SIZE_T cbBuffer, |
| 105 | __inout SIZE_T* piBuffer, |
| 106 | __out DWORD_PTR* pdw64 |
| 107 | ) |
| 108 | { |
| 109 | Assert(pbBuffer); |
| 110 | Assert(piBuffer); |
| 111 | Assert(pdw64); |
| 112 | |
| 113 | HRESULT hr = S_OK; |
| 114 | SIZE_T cbAvailable = 0; |
| 115 | |
| 116 | // get availiable data size |
| 117 | hr = ::SIZETSub(cbBuffer, *piBuffer, &cbAvailable); |
| 118 | BuffExitOnRootFailure(hr, "Failed to calculate available data size."); |
| 119 | |
| 120 | // verify buffer size |
| 121 | if (sizeof(DWORD_PTR) > cbAvailable) |
| 122 | { |
| 123 | hr = E_INVALIDARG; |
| 124 | BuffExitOnRootFailure(hr, "Buffer too small to read pointer. cbAvailable: %u", cbAvailable); |
| 125 | } |
| 126 | |
| 127 | *pdw64 = *(const DWORD_PTR*)(pbBuffer + *piBuffer); |
| 128 | *piBuffer += sizeof(DWORD_PTR); |
| 129 | |
| 130 | LExit: |
| 131 | return hr; |
| 132 | } |
| 133 | |
| 134 | extern "C" HRESULT BuffReadString( |
| 135 | __in_bcount(cbBuffer) const BYTE* pbBuffer, |
| 136 | __in SIZE_T cbBuffer, |
| 137 | __inout SIZE_T* piBuffer, |
| 138 | __deref_out_z LPWSTR* pscz |
| 139 | ) |
| 140 | { |
| 141 | Assert(pbBuffer); |
| 142 | Assert(piBuffer); |
| 143 | Assert(pscz); |
| 144 | |
| 145 | HRESULT hr = S_OK; |
| 146 | DWORD cch = 0; |
| 147 | SIZE_T cb = 0; |
| 148 | SIZE_T cbAvailable = 0; |
| 149 | |
| 150 | // get availiable data size |
| 151 | hr = ::SIZETSub(cbBuffer, *piBuffer, &cbAvailable); |
| 152 | BuffExitOnRootFailure(hr, "Failed to calculate available data size for character count."); |
| 153 | |
| 154 | // verify buffer size |
| 155 | if (sizeof(DWORD) > cbAvailable) |
| 156 | { |
| 157 | hr = E_INVALIDARG; |
| 158 | BuffExitOnRootFailure(hr, "Buffer too small to read size of string. cbAvailable: %u", cbAvailable); |
| 159 | } |
| 160 | |
| 161 | // read character count |
| 162 | cch = *(const DWORD*)(pbBuffer + *piBuffer); |
| 163 | |
| 164 | hr = ::SIZETMult(cch, sizeof(WCHAR), &cb); |
| 165 | BuffExitOnRootFailure(hr, "Overflow while multiplying to calculate buffer size"); |
| 166 | |
| 167 | hr = ::SIZETAdd(*piBuffer, sizeof(cch), piBuffer); |
| 168 | BuffExitOnRootFailure(hr, "Overflow while adding to calculate buffer size"); |
| 169 | |
| 170 | // get availiable data size |
| 171 | hr = ::SIZETSub(cbBuffer, *piBuffer, &cbAvailable); |
| 172 | BuffExitOnRootFailure(hr, "Failed to calculate available data size for character buffer."); |
| 173 | |
| 174 | // verify buffer size |
| 175 | if (cb > cbAvailable) |
| 176 | { |
| 177 | hr = E_INVALIDARG; |
| 178 | BuffExitOnRootFailure(hr, "Buffer too small to read string data. cbAvailable: %u, cb: %u", cbAvailable, cb); |
| 179 | } |
| 180 | |
| 181 | // copy character data |
| 182 | hr = StrAllocString(pscz, cch ? (LPCWSTR)(pbBuffer + *piBuffer) : L"", cch); |
| 183 | BuffExitOnFailure(hr, "Failed to copy character data."); |
| 184 | |
| 185 | *piBuffer += cb; |
| 186 | |
| 187 | LExit: |
| 188 | return hr; |
| 189 | } |
| 190 | |
| 191 | extern "C" HRESULT BuffReadStringAnsi( |
| 192 | __in_bcount(cbBuffer) const BYTE* pbBuffer, |
| 193 | __in SIZE_T cbBuffer, |
| 194 | __inout SIZE_T* piBuffer, |
| 195 | __deref_out_z LPSTR* pscz |
| 196 | ) |
| 197 | { |
| 198 | Assert(pbBuffer); |
| 199 | Assert(piBuffer); |
| 200 | Assert(pscz); |
| 201 | |
| 202 | HRESULT hr = S_OK; |
| 203 | DWORD cch = 0; |
| 204 | SIZE_T cb = 0; |
| 205 | SIZE_T cbAvailable = 0; |
| 206 | |
| 207 | // get availiable data size |
| 208 | hr = ::SIZETSub(cbBuffer, *piBuffer, &cbAvailable); |
| 209 | BuffExitOnRootFailure(hr, "Failed to calculate available data size for character count."); |
| 210 | |
| 211 | // verify buffer size |
| 212 | if (sizeof(DWORD) > cbAvailable) |
| 213 | { |
| 214 | hr = E_INVALIDARG; |
| 215 | BuffExitOnRootFailure(hr, "Buffer too small to read size of ANSI string. cbAvailable: %u", cbAvailable); |
| 216 | } |
| 217 | |
| 218 | // read character count |
| 219 | cch = *(const DWORD*)(pbBuffer + *piBuffer); |
| 220 | |
| 221 | hr = ::SIZETMult(cch, sizeof(CHAR), &cb); |
| 222 | BuffExitOnRootFailure(hr, "Overflow while multiplying to calculate buffer size"); |
| 223 | |
| 224 | hr = ::SIZETAdd(*piBuffer, sizeof(cch), piBuffer); |
| 225 | BuffExitOnRootFailure(hr, "Overflow while adding to calculate buffer size"); |
| 226 | |
| 227 | // get availiable data size |
| 228 | hr = ::SIZETSub(cbBuffer, *piBuffer, &cbAvailable); |
| 229 | BuffExitOnRootFailure(hr, "Failed to calculate available data size for character buffer."); |
| 230 | |
| 231 | // verify buffer size |
| 232 | if (cb > cbAvailable) |
| 233 | { |
| 234 | hr = E_INVALIDARG; |
| 235 | BuffExitOnRootFailure(hr, "Buffer too small to read ANSI string data. cbAvailable: %u, cb: %u", cbAvailable, cb); |
| 236 | } |
| 237 | |
| 238 | // copy character data |
| 239 | hr = StrAnsiAllocStringAnsi(pscz, cch ? (LPCSTR)(pbBuffer + *piBuffer) : "", cch); |
| 240 | BuffExitOnFailure(hr, "Failed to copy character data."); |
| 241 | |
| 242 | *piBuffer += cb; |
| 243 | |
| 244 | LExit: |
| 245 | return hr; |
| 246 | } |
| 247 | |
| 248 | extern "C" HRESULT BuffReadStream( |
| 249 | __in_bcount(cbBuffer) const BYTE* pbBuffer, |
| 250 | __in SIZE_T cbBuffer, |
| 251 | __inout SIZE_T* piBuffer, |
| 252 | __deref_inout_bcount(*pcbStream) BYTE** ppbStream, |
| 253 | __out SIZE_T* pcbStream |
| 254 | ) |
| 255 | { |
| 256 | Assert(pbBuffer); |
| 257 | Assert(piBuffer); |
| 258 | Assert(ppbStream); |
| 259 | Assert(pcbStream); |
| 260 | |
| 261 | HRESULT hr = S_OK; |
| 262 | SIZE_T cb = 0; |
| 263 | SIZE_T cbAvailable = 0; |
| 264 | errno_t err = 0; |
| 265 | |
| 266 | // get availiable data size |
| 267 | hr = ::SIZETSub(cbBuffer, *piBuffer, &cbAvailable); |
| 268 | BuffExitOnRootFailure(hr, "Failed to calculate available data size for stream size."); |
| 269 | |
| 270 | // verify buffer size |
| 271 | if (sizeof(DWORD) > cbAvailable) |
| 272 | { |
| 273 | hr = E_INVALIDARG; |
| 274 | BuffExitOnRootFailure(hr, "Buffer too small to read size of stream. cbAvailable: %u, cb: %u", cbAvailable, cb); |
| 275 | } |
| 276 | |
| 277 | // read stream size |
| 278 | cb = *(const DWORD*)(pbBuffer + *piBuffer); |
| 279 | *piBuffer += sizeof(DWORD); |
| 280 | |
| 281 | // get availiable data size |
| 282 | hr = ::SIZETSub(cbBuffer, *piBuffer, &cbAvailable); |
| 283 | BuffExitOnRootFailure(hr, "Failed to calculate available data size for stream buffer."); |
| 284 | |
| 285 | // verify buffer size |
| 286 | if (cb > cbAvailable) |
| 287 | { |
| 288 | hr = E_INVALIDARG; |
| 289 | BuffExitOnRootFailure(hr, "Buffer too small to read stream data. cbAvailable: %u, cb: %u", cbAvailable, cb); |
| 290 | } |
| 291 | |
| 292 | // allocate buffer |
| 293 | *ppbStream = (BYTE*)MemAlloc(cb, TRUE); |
| 294 | BuffExitOnNull(*ppbStream, hr, E_OUTOFMEMORY, "Failed to allocate stream."); |
| 295 | |
| 296 | // read stream data |
| 297 | err = memcpy_s(*ppbStream, cbBuffer - *piBuffer, pbBuffer + *piBuffer, cb); |
| 298 | if (err) |
| 299 | { |
| 300 | BuffExitOnRootFailure(hr = E_INVALIDARG, "Failed to read stream from buffer, error: %d", err); |
| 301 | } |
| 302 | |
| 303 | *piBuffer += cb; |
| 304 | |
| 305 | // return stream size |
| 306 | *pcbStream = cb; |
| 307 | |
| 308 | LExit: |
| 309 | return hr; |
| 310 | } |
| 311 | |
| 312 | |
| 313 | // Buffer Reader read functions |
| 314 | |
| 315 | extern "C" HRESULT BuffReaderReadNumber( |
| 316 | __in BUFF_READER* pReader, |
| 317 | __out DWORD* pdw |
| 318 | ) |
| 319 | { |
| 320 | return BuffReadNumber(pReader->pbData, pReader->cbData, &pReader->iBuffer, pdw); |
| 321 | } |
| 322 | |
| 323 | extern "C" HRESULT BuffReaderReadNumber64( |
| 324 | __in BUFF_READER* pReader, |
| 325 | __out DWORD64* pdw64 |
| 326 | ) |
| 327 | { |
| 328 | return BuffReadNumber64(pReader->pbData, pReader->cbData, &pReader->iBuffer, pdw64); |
| 329 | } |
| 330 | |
| 331 | extern "C" HRESULT BuffReaderReadPointer( |
| 332 | __in BUFF_READER* pReader, |
| 333 | __out DWORD_PTR* pdw |
| 334 | ) |
| 335 | { |
| 336 | return BuffReadPointer(pReader->pbData, pReader->cbData, &pReader->iBuffer, pdw); |
| 337 | } |
| 338 | |
| 339 | extern "C" HRESULT BuffReaderReadString( |
| 340 | __in BUFF_READER* pReader, |
| 341 | __deref_out_z LPWSTR* pscz |
| 342 | ) |
| 343 | { |
| 344 | return BuffReadString(pReader->pbData, pReader->cbData, &pReader->iBuffer, pscz); |
| 345 | } |
| 346 | |
| 347 | extern "C" HRESULT BuffReaderReadStringAnsi( |
| 348 | __in BUFF_READER* pReader, |
| 349 | __deref_out_z LPSTR* pscz |
| 350 | ) |
| 351 | { |
| 352 | return BuffReadStringAnsi(pReader->pbData, pReader->cbData, &pReader->iBuffer, pscz); |
| 353 | } |
| 354 | |
| 355 | |
| 356 | // Buffer write functions |
| 357 | |
| 358 | extern "C" HRESULT BuffWriteNumber( |
| 359 | __deref_inout_bcount(*piBuffer) BYTE** ppbBuffer, |
| 360 | __inout SIZE_T* piBuffer, |
| 361 | __in DWORD dw |
| 362 | ) |
| 363 | { |
| 364 | Assert(ppbBuffer); |
| 365 | Assert(piBuffer); |
| 366 | |
| 367 | HRESULT hr = S_OK; |
| 368 | |
| 369 | // make sure we have a buffer with sufficient space |
| 370 | hr = EnsureBufferSize(ppbBuffer, *piBuffer + sizeof(DWORD)); |
| 371 | BuffExitOnFailure(hr, "Failed to ensure buffer size."); |
| 372 | |
| 373 | // copy data to buffer |
| 374 | *reinterpret_cast<DWORD*>(*ppbBuffer + *piBuffer) = dw; |
| 375 | *piBuffer += sizeof(DWORD); |
| 376 | |
| 377 | LExit: |
| 378 | return hr; |
| 379 | } |
| 380 | |
| 381 | extern "C" HRESULT BuffWriteNumber64( |
| 382 | __deref_inout_bcount(*piBuffer) BYTE** ppbBuffer, |
| 383 | __inout SIZE_T* piBuffer, |
| 384 | __in DWORD64 dw64 |
| 385 | ) |
| 386 | { |
| 387 | Assert(ppbBuffer); |
| 388 | Assert(piBuffer); |
| 389 | |
| 390 | HRESULT hr = S_OK; |
| 391 | |
| 392 | // make sure we have a buffer with sufficient space |
| 393 | hr = EnsureBufferSize(ppbBuffer, *piBuffer + sizeof(DWORD64)); |
| 394 | BuffExitOnFailure(hr, "Failed to ensure buffer size."); |
| 395 | |
| 396 | // copy data to buffer |
| 397 | *(DWORD64*)(*ppbBuffer + *piBuffer) = dw64; |
| 398 | *piBuffer += sizeof(DWORD64); |
| 399 | |
| 400 | LExit: |
| 401 | return hr; |
| 402 | } |
| 403 | |
| 404 | extern "C" HRESULT BuffWritePointer( |
| 405 | __deref_inout_bcount(*piBuffer) BYTE** ppbBuffer, |
| 406 | __inout SIZE_T* piBuffer, |
| 407 | __in DWORD_PTR dw |
| 408 | ) |
| 409 | { |
| 410 | Assert(ppbBuffer); |
| 411 | Assert(piBuffer); |
| 412 | |
| 413 | HRESULT hr = S_OK; |
| 414 | |
| 415 | // make sure we have a buffer with sufficient space |
| 416 | hr = EnsureBufferSize(ppbBuffer, *piBuffer + sizeof(DWORD_PTR)); |
| 417 | BuffExitOnFailure(hr, "Failed to ensure buffer size."); |
| 418 | |
| 419 | // copy data to buffer |
| 420 | *(DWORD_PTR*)(*ppbBuffer + *piBuffer) = dw; |
| 421 | *piBuffer += sizeof(DWORD_PTR); |
| 422 | |
| 423 | LExit: |
| 424 | return hr; |
| 425 | } |
| 426 | |
| 427 | extern "C" HRESULT BuffWriteString( |
| 428 | __deref_inout_bcount(*piBuffer) BYTE** ppbBuffer, |
| 429 | __inout SIZE_T* piBuffer, |
| 430 | __in_z_opt LPCWSTR scz |
| 431 | ) |
| 432 | { |
| 433 | Assert(ppbBuffer); |
| 434 | Assert(piBuffer); |
| 435 | |
| 436 | HRESULT hr = S_OK; |
| 437 | DWORD cch = 0; // This value *MUST* be treated as a DWORD to be marshalled over the pipe between 32-bit and 64-bit process the same. |
| 438 | SIZE_T cb = 0; |
| 439 | errno_t err = 0; |
| 440 | |
| 441 | if (scz) |
| 442 | { |
| 443 | size_t size = 0; |
| 444 | |
| 445 | hr = ::StringCchLengthW(scz, STRSAFE_MAX_CCH, &size); |
| 446 | BuffExitOnRootFailure(hr, "Failed to get string size."); |
| 447 | |
| 448 | if (size > DWORD_MAX) |
| 449 | { |
| 450 | hr = E_INVALIDARG; |
| 451 | BuffExitOnRootFailure(hr, "String too long to write to buffer."); |
| 452 | } |
| 453 | |
| 454 | cch = static_cast<DWORD>(size); |
| 455 | } |
| 456 | |
| 457 | cb = cch * sizeof(WCHAR); |
| 458 | |
| 459 | // make sure we have a buffer with sufficient space for the length plus the string without terminator. |
| 460 | hr = EnsureBufferSize(ppbBuffer, *piBuffer + sizeof(DWORD) + cb); |
| 461 | BuffExitOnFailure(hr, "Failed to ensure buffer size."); |
| 462 | |
| 463 | // copy the character count to buffer as a DWORD |
| 464 | *reinterpret_cast<DWORD*>(*ppbBuffer + *piBuffer) = cch; |
| 465 | *piBuffer += sizeof(DWORD); |
| 466 | |
| 467 | // copy data to buffer |
| 468 | err = memcpy_s(*ppbBuffer + *piBuffer, cb, scz, cb); |
| 469 | if (err) |
| 470 | { |
| 471 | BuffExitOnRootFailure(hr = E_INVALIDARG, "Failed to write string to buffer: '%ls', error: %d", scz, err); |
| 472 | } |
| 473 | |
| 474 | *piBuffer += cb; |
| 475 | |
| 476 | LExit: |
| 477 | return hr; |
| 478 | } |
| 479 | |
| 480 | extern "C" HRESULT BuffWriteStringAnsi( |
| 481 | __deref_inout_bcount(*piBuffer) BYTE** ppbBuffer, |
| 482 | __inout SIZE_T* piBuffer, |
| 483 | __in_z_opt LPCSTR scz |
| 484 | ) |
| 485 | { |
| 486 | Assert(ppbBuffer); |
| 487 | Assert(piBuffer); |
| 488 | |
| 489 | HRESULT hr = S_OK; |
| 490 | DWORD cch = 0; // This value *MUST* be treated as a DWORD to be marshalled over the pipe between 32-bit and 64-bit process the same. |
| 491 | SIZE_T cb = 0; |
| 492 | errno_t err = 0; |
| 493 | |
| 494 | if (scz) |
| 495 | { |
| 496 | size_t size = 0; |
| 497 | |
| 498 | hr = ::StringCchLengthA(scz, STRSAFE_MAX_CCH, &size); |
| 499 | BuffExitOnRootFailure(hr, "Failed to get ANSI string size.") |
| 500 | |
| 501 | if (size > DWORD_MAX) |
| 502 | { |
| 503 | hr = E_INVALIDARG; |
| 504 | BuffExitOnRootFailure(hr, "ANSI string too long to write to buffer."); |
| 505 | } |
| 506 | |
| 507 | cch = static_cast<DWORD>(size); |
| 508 | } |
| 509 | |
| 510 | cb = cch * sizeof(CHAR); |
| 511 | |
| 512 | // make sure we have a buffer with sufficient space |
| 513 | hr = EnsureBufferSize(ppbBuffer, *piBuffer + (sizeof(DWORD) + cb)); |
| 514 | BuffExitOnFailure(hr, "Failed to ensure buffer size."); |
| 515 | |
| 516 | // copy character count to buffer |
| 517 | *reinterpret_cast<DWORD*>(*ppbBuffer + *piBuffer) = cch; |
| 518 | *piBuffer += sizeof(DWORD); |
| 519 | |
| 520 | // copy data to buffer |
| 521 | err = memcpy_s(*ppbBuffer + *piBuffer, cb, scz, cb); |
| 522 | if (err) |
| 523 | { |
| 524 | BuffExitOnRootFailure(hr = E_INVALIDARG, "Failed to write string to buffer: '%hs', error: %d", scz, err); |
| 525 | } |
| 526 | |
| 527 | *piBuffer += cb; |
| 528 | |
| 529 | LExit: |
| 530 | return hr; |
| 531 | } |
| 532 | |
| 533 | extern "C" HRESULT BuffWriteStream( |
| 534 | __deref_inout_bcount(*piBuffer) BYTE** ppbBuffer, |
| 535 | __inout SIZE_T* piBuffer, |
| 536 | __in_bcount(cbStream) const BYTE* pbStream, |
| 537 | __in SIZE_T cbStream |
| 538 | ) |
| 539 | { |
| 540 | Assert(ppbBuffer); |
| 541 | Assert(piBuffer); |
| 542 | Assert(pbStream); |
| 543 | |
| 544 | HRESULT hr = S_OK; |
| 545 | DWORD cb = 0; |
| 546 | errno_t err = 0; |
| 547 | |
| 548 | if (cbStream > DWORD_MAX) |
| 549 | { |
| 550 | hr = E_INVALIDARG; |
| 551 | BuffExitOnRootFailure(hr, "Stream too large to write to buffer."); |
| 552 | } |
| 553 | |
| 554 | cb = static_cast<DWORD>(cbStream); |
| 555 | |
| 556 | // make sure we have a buffer with sufficient space |
| 557 | hr = EnsureBufferSize(ppbBuffer, *piBuffer + cbStream + sizeof(DWORD)); |
| 558 | BuffExitOnFailure(hr, "Failed to ensure buffer size."); |
| 559 | |
| 560 | // copy byte count to buffer |
| 561 | *reinterpret_cast<DWORD*>(*ppbBuffer + *piBuffer) = cb; |
| 562 | *piBuffer += sizeof(DWORD); |
| 563 | |
| 564 | if (cbStream) |
| 565 | { |
| 566 | // copy data to buffer |
| 567 | err = memcpy_s(*ppbBuffer + *piBuffer, cbStream, pbStream, cbStream); |
| 568 | if (err) |
| 569 | { |
| 570 | BuffExitOnRootFailure(hr = E_INVALIDARG, "Failed to write stream to buffer, error: %d", err); |
| 571 | } |
| 572 | |
| 573 | *piBuffer += cbStream; |
| 574 | } |
| 575 | |
| 576 | LExit: |
| 577 | return hr; |
| 578 | } |
| 579 | |
| 580 | // Buffer-based write functions |
| 581 | |
| 582 | extern "C" HRESULT BuffWriteNumberToBuffer( |
| 583 | __in BUFF_BUFFER* pBuffer, |
| 584 | __out DWORD dw |
| 585 | ) |
| 586 | { |
| 587 | return BuffWriteNumber(&pBuffer->pbData, &pBuffer->cbData, dw); |
| 588 | } |
| 589 | |
| 590 | extern "C" HRESULT BuffWriteNumber64ToBuffer( |
| 591 | __in BUFF_BUFFER* pBuffer, |
| 592 | __out DWORD64 dw64 |
| 593 | ) |
| 594 | { |
| 595 | return BuffWriteNumber64(&pBuffer->pbData, &pBuffer->cbData, dw64); |
| 596 | } |
| 597 | |
| 598 | extern "C" HRESULT BuffWritePointerToBuffer( |
| 599 | __in BUFF_BUFFER* pBuffer, |
| 600 | __out DWORD_PTR dw |
| 601 | ) |
| 602 | { |
| 603 | return BuffWritePointer(&pBuffer->pbData, &pBuffer->cbData, dw); |
| 604 | } |
| 605 | |
| 606 | extern "C" HRESULT BuffWriteStringToBuffer( |
| 607 | __in BUFF_BUFFER* pBuffer, |
| 608 | __in_z_opt LPCWSTR scz |
| 609 | ) |
| 610 | { |
| 611 | return BuffWriteString(&pBuffer->pbData, &pBuffer->cbData, scz); |
| 612 | } |
| 613 | |
| 614 | extern "C" HRESULT BuffWriteStringAnsiToBuffer( |
| 615 | __in BUFF_BUFFER* pBuffer, |
| 616 | __in_z_opt LPCSTR scz |
| 617 | ) |
| 618 | { |
| 619 | return BuffWriteStringAnsi(&pBuffer->pbData, &pBuffer->cbData, scz); |
| 620 | } |
| 621 | |
| 622 | extern "C" HRESULT BuffWriteStreamToBuffer( |
| 623 | __in BUFF_BUFFER* pBuffer, |
| 624 | __in_bcount(cbStream) const BYTE* pbStream, |
| 625 | __in SIZE_T cbStream |
| 626 | ) |
| 627 | { |
| 628 | return BuffWriteStream(&pBuffer->pbData, &pBuffer->cbData, pbStream, cbStream); |
| 629 | } |
| 630 | |
| 631 | // Buffer Writer write functions |
| 632 | |
| 633 | extern "C" HRESULT BuffWriterWriteNumber( |
| 634 | __in BUFF_WRITER* pWriter, |
| 635 | __out DWORD dw |
| 636 | ) |
| 637 | { |
| 638 | return BuffWriteNumber(pWriter->ppbData, pWriter->pcbData, dw); |
| 639 | } |
| 640 | |
| 641 | extern "C" HRESULT BuffWriterWriteNumber64( |
| 642 | __in BUFF_WRITER* pWriter, |
| 643 | __out DWORD64 dw64 |
| 644 | ) |
| 645 | { |
| 646 | return BuffWriteNumber64(pWriter->ppbData, pWriter->pcbData, dw64); |
| 647 | } |
| 648 | |
| 649 | extern "C" HRESULT BuffWriterWritePointer( |
| 650 | __in BUFF_WRITER* pWriter, |
| 651 | __out DWORD_PTR dw |
| 652 | ) |
| 653 | { |
| 654 | return BuffWritePointer(pWriter->ppbData, pWriter->pcbData, dw); |
| 655 | } |
| 656 | |
| 657 | extern "C" HRESULT BuffWriterWriteString( |
| 658 | __in BUFF_WRITER* pWriter, |
| 659 | __in_z_opt LPCWSTR scz |
| 660 | ) |
| 661 | { |
| 662 | return BuffWriteString(pWriter->ppbData, pWriter->pcbData, scz); |
| 663 | } |
| 664 | |
| 665 | extern "C" HRESULT BuffWriterWriteStringAnsi( |
| 666 | __in BUFF_WRITER* pWriter, |
| 667 | __in_z_opt LPCSTR scz |
| 668 | ) |
| 669 | { |
| 670 | return BuffWriteStringAnsi(pWriter->ppbData, pWriter->pcbData, scz); |
| 671 | } |
| 672 | |
| 673 | extern "C" HRESULT BuffWriterWriteStream( |
| 674 | __in BUFF_WRITER* pWriter, |
| 675 | __in_bcount(cbStream) const BYTE* pbStream, |
| 676 | __in SIZE_T cbStream |
| 677 | ) |
| 678 | { |
| 679 | return BuffWriteStream(pWriter->ppbData, pWriter->pcbData, pbStream, cbStream); |
| 680 | } |
| 681 | |
| 682 | |
| 683 | // helper functions |
| 684 | |
| 685 | static HRESULT EnsureBufferSize( |
| 686 | __deref_inout_bcount(cbSize) BYTE** ppbBuffer, |
| 687 | __in SIZE_T cbSize |
| 688 | ) |
| 689 | { |
| 690 | HRESULT hr = S_OK; |
| 691 | SIZE_T cbTarget = ((cbSize / BUFFER_INCREMENT) + 1) * BUFFER_INCREMENT; |
| 692 | SIZE_T cbCurrent = 0; |
| 693 | |
| 694 | if (*ppbBuffer) |
| 695 | { |
| 696 | hr = MemSizeChecked(*ppbBuffer, &cbCurrent); |
| 697 | BuffExitOnFailure(hr, "Failed to get current buffer size."); |
| 698 | |
| 699 | if (cbCurrent < cbTarget) |
| 700 | { |
| 701 | LPVOID pv = MemReAlloc(*ppbBuffer, cbTarget, TRUE); |
| 702 | BuffExitOnNull(pv, hr, E_OUTOFMEMORY, "Failed to reallocate buffer."); |
| 703 | *ppbBuffer = (BYTE*)pv; |
| 704 | } |
| 705 | } |
| 706 | else |
| 707 | { |
| 708 | *ppbBuffer = (BYTE*)MemAlloc(cbTarget, TRUE); |
| 709 | BuffExitOnNull(*ppbBuffer, hr, E_OUTOFMEMORY, "Failed to allocate buffer."); |
| 710 | } |
| 711 | |
| 712 | LExit: |
| 713 | return hr; |
| 714 | } |