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1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2014 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #include "../../include/fxcrt/fx_ext.h" | 7 #include "../../include/fxcrt/fx_ext.h" |
8 #include "extension.h" | 8 #include "extension.h" |
9 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ | 9 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ |
10 #include <wincrypt.h> | 10 #include <wincrypt.h> |
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268 } | 268 } |
269 #ifdef __cplusplus | 269 #ifdef __cplusplus |
270 } | 270 } |
271 #endif | 271 #endif |
272 #ifdef __cplusplus | 272 #ifdef __cplusplus |
273 extern "C" { | 273 extern "C" { |
274 #endif | 274 #endif |
275 FX_LPVOID FX_Random_MT_Start(FX_DWORD dwSeed) | 275 FX_LPVOID FX_Random_MT_Start(FX_DWORD dwSeed) |
276 { | 276 { |
277 FX_LPMTRANDOMCONTEXT pContext = FX_Alloc(FX_MTRANDOMCONTEXT, 1); | 277 FX_LPMTRANDOMCONTEXT pContext = FX_Alloc(FX_MTRANDOMCONTEXT, 1); |
278 if (!pContext) { | |
279 return NULL; | |
280 } | |
281 pContext->mt[0] = dwSeed; | 278 pContext->mt[0] = dwSeed; |
282 FX_DWORD &i = pContext->mti; | 279 FX_DWORD &i = pContext->mti; |
283 FX_LPDWORD pBuf = pContext->mt; | 280 FX_LPDWORD pBuf = pContext->mt; |
284 for (i = 1; i < MT_N; i ++) { | 281 for (i = 1; i < MT_N; i ++) { |
285 pBuf[i] = (1812433253UL * (pBuf[i - 1] ^ (pBuf[i - 1] >> 30)) + i); | 282 pBuf[i] = (1812433253UL * (pBuf[i - 1] ^ (pBuf[i - 1] >> 30)) + i); |
286 } | 283 } |
287 pContext->bHaveSeed = TRUE; | 284 pContext->bHaveSeed = TRUE; |
288 return pContext; | 285 return pContext; |
289 } | 286 } |
290 FX_DWORD FX_Random_MT_Generate(FX_LPVOID pContext) | 287 FX_DWORD FX_Random_MT_Generate(FX_LPVOID pContext) |
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376 { | 373 { |
377 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ | 374 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ |
378 FX_GenerateCryptoRandom(pBuffer, iCount); | 375 FX_GenerateCryptoRandom(pBuffer, iCount); |
379 #else | 376 #else |
380 FX_Random_GenerateBase(pBuffer, iCount); | 377 FX_Random_GenerateBase(pBuffer, iCount); |
381 #endif | 378 #endif |
382 } | 379 } |
383 #ifdef __cplusplus | 380 #ifdef __cplusplus |
384 } | 381 } |
385 #endif | 382 #endif |
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