core/src/fxcrt/fx_extension.cpp - pdfium - Git at Google

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

 #include "../../include/fxcrt/fx_ext.h"
 #include "extension.h"
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
 #include <wincrypt.h>
 #else
 #include <ctime>
 #endif
 FX_HFILE FX_File_Open(const CFX_ByteStringC& fileName, FX_DWORD dwMode)
 {
     IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
     if (pFA && !pFA->Open(fileName, dwMode)) {
         pFA->Release();
         return NULL;
     }
     return (FX_HFILE)pFA;
 }
 FX_HFILE FX_File_Open(const CFX_WideStringC& fileName, FX_DWORD dwMode)
 {
     IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
     if (pFA && !pFA->Open(fileName, dwMode)) {
         pFA->Release();
         return NULL;
     }
     return (FX_HFILE)pFA;
 }
 void FX_File_Close(FX_HFILE hFile)
 {
     FXSYS_assert(hFile != NULL);
     ((IFXCRT_FileAccess*)hFile)->Close();
     ((IFXCRT_FileAccess*)hFile)->Release();
 }
 FX_FILESIZE FX_File_GetSize(FX_HFILE hFile)
 {
     FXSYS_assert(hFile != NULL);
     return ((IFXCRT_FileAccess*)hFile)->GetSize();
 }
 FX_FILESIZE FX_File_GetPosition(FX_HFILE hFile)
 {
     FXSYS_assert(hFile != NULL);
     return ((IFXCRT_FileAccess*)hFile)->GetPosition();
 }
 FX_FILESIZE FX_File_SetPosition(FX_HFILE hFile, FX_FILESIZE pos)
 {
     FXSYS_assert(hFile != NULL);
     return ((IFXCRT_FileAccess*)hFile)->SetPosition(pos);
 }
 size_t FX_File_Read(FX_HFILE hFile, void* pBuffer, size_t szBuffer)
 {
     FXSYS_assert(hFile != NULL);
     return ((IFXCRT_FileAccess*)hFile)->Read(pBuffer, szBuffer);
 }
 size_t FX_File_ReadPos(FX_HFILE hFile, void* pBuffer, size_t szBuffer, FX_FILESIZE pos)
 {
     FXSYS_assert(hFile != NULL);
     return ((IFXCRT_FileAccess*)hFile)->ReadPos(pBuffer, szBuffer, pos);
 }
 size_t FX_File_Write(FX_HFILE hFile, const void* pBuffer, size_t szBuffer)
 {
     FXSYS_assert(hFile != NULL);
     return ((IFXCRT_FileAccess*)hFile)->Write(pBuffer, szBuffer);
 }
 size_t FX_File_WritePos(FX_HFILE hFile, const void* pBuffer, size_t szBuffer, FX_FILESIZE pos)
 {
     FXSYS_assert(hFile != NULL);
     return ((IFXCRT_FileAccess*)hFile)->WritePos(pBuffer, szBuffer, pos);
 }
 FX_BOOL FX_File_Flush(FX_HFILE hFile)
 {
     FXSYS_assert(hFile != NULL);
     return ((IFXCRT_FileAccess*)hFile)->Flush();
 }
 FX_BOOL FX_File_Truncate(FX_HFILE hFile, FX_FILESIZE szFile)
 {
     FXSYS_assert(hFile != NULL);
     return ((IFXCRT_FileAccess*)hFile)->Truncate(szFile);
 }
 IFX_FileStream* FX_CreateFileStream(const FX_CHAR* filename, FX_DWORD dwModes)
 {
     IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
     if (!pFA) {
         return NULL;
     }
     if (!pFA->Open(filename, dwModes)) {
         pFA->Release();
         return NULL;
     }
     return new CFX_CRTFileStream(pFA);
 }
 IFX_FileStream* FX_CreateFileStream(const FX_WCHAR* filename, FX_DWORD dwModes)
 {
     IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
     if (!pFA) {
         return NULL;
     }
     if (!pFA->Open(filename, dwModes)) {
         pFA->Release();
         return NULL;
     }
     return new CFX_CRTFileStream(pFA);
 }
 IFX_FileWrite* FX_CreateFileWrite(const FX_CHAR* filename)
 {
     return FX_CreateFileStream(filename, FX_FILEMODE_Truncate);
 }
 IFX_FileWrite* FX_CreateFileWrite(const FX_WCHAR* filename)
 {
     return FX_CreateFileStream(filename, FX_FILEMODE_Truncate);
 }
 IFX_FileRead* FX_CreateFileRead(const FX_CHAR* filename)
 {
     return FX_CreateFileStream(filename, FX_FILEMODE_ReadOnly);
 }
 IFX_FileRead* FX_CreateFileRead(const FX_WCHAR* filename)
 {
     return FX_CreateFileStream(filename, FX_FILEMODE_ReadOnly);
 }
 IFX_MemoryStream* FX_CreateMemoryStream(uint8_t* pBuffer, size_t dwSize, FX_BOOL bTakeOver)
 {
     return new CFX_MemoryStream(pBuffer, dwSize, bTakeOver);
 }
 IFX_MemoryStream* FX_CreateMemoryStream(FX_BOOL bConsecutive)
 {
     return new CFX_MemoryStream(bConsecutive);
 }
 #ifdef __cplusplus
 extern "C" {
 #endif
 FX_FLOAT FXSYS_tan(FX_FLOAT a)
 {
     return (FX_FLOAT)tan(a);
 }
 FX_FLOAT FXSYS_logb(FX_FLOAT b, FX_FLOAT x)
 {
     return FXSYS_log(x) / FXSYS_log(b);
 }
 FX_FLOAT FXSYS_strtof(const FX_CHAR* pcsStr, int32_t iLength, int32_t *pUsedLen)
 {
     FXSYS_assert(pcsStr != NULL);
     if (iLength < 0) {
         iLength = (int32_t)FXSYS_strlen(pcsStr);
     }
     CFX_WideString ws = CFX_WideString::FromLocal(pcsStr, iLength);
     return FXSYS_wcstof(ws.c_str(), iLength, pUsedLen);
 }
 FX_FLOAT FXSYS_wcstof(const FX_WCHAR* pwsStr, int32_t iLength, int32_t *pUsedLen)
 {
     FXSYS_assert(pwsStr != NULL);
     if (iLength < 0) {
         iLength = (int32_t)FXSYS_wcslen(pwsStr);
     }
     if (iLength == 0) {
         return 0.0f;
     }
     int32_t iUsedLen = 0;
     FX_BOOL bNegtive = FALSE;
     switch (pwsStr[iUsedLen]) {
         case '-':
             bNegtive = TRUE;
         case '+':
             iUsedLen++;
             break;
     }
     FX_FLOAT fValue = 0.0f;
     while (iUsedLen < iLength) {
         FX_WCHAR wch = pwsStr[iUsedLen];
         if (wch >= L'0' && wch <= L'9') {
             fValue = fValue * 10.0f + (wch - L'0');
         } else {
             break;
         }
         iUsedLen++;
     }
     if (iUsedLen < iLength && pwsStr[iUsedLen] == L'.') {
         FX_FLOAT fPrecise = 0.1f;
         while (++iUsedLen < iLength) {
             FX_WCHAR wch = pwsStr[iUsedLen];
             if (wch >= L'0' && wch <= L'9') {
                 fValue += (wch - L'0') * fPrecise;
                 fPrecise *= 0.1f;
             } else {
                 break;
             }
         }
     }
     if (pUsedLen) {
         *pUsedLen = iUsedLen;
     }
     return bNegtive ? -fValue : fValue;
 }
 FX_WCHAR* FXSYS_wcsncpy(FX_WCHAR* dstStr, const FX_WCHAR* srcStr, size_t count)
 {
     FXSYS_assert(dstStr != NULL && srcStr != NULL && count > 0);
     for (size_t i = 0; i < count; ++i)
         if ((dstStr[i] = srcStr[i]) == L'\0') {
             break;
         }
     return dstStr;
 }
 int32_t FXSYS_wcsnicmp(const FX_WCHAR* s1, const FX_WCHAR* s2, size_t count)
 {
     FXSYS_assert(s1 != NULL && s2 != NULL && count > 0);
     FX_WCHAR wch1 = 0, wch2 = 0;
     while (count-- > 0) {
         wch1 = (FX_WCHAR)FXSYS_tolower(*s1++);
         wch2 = (FX_WCHAR)FXSYS_tolower(*s2++);
         if (wch1 != wch2) {
             break;
         }
     }
     return wch1 - wch2;
 }
 int32_t FXSYS_strnicmp(const FX_CHAR* s1, const FX_CHAR* s2, size_t count)
 {
     FXSYS_assert(s1 != NULL && s2 != NULL && count > 0);
     FX_CHAR ch1 = 0, ch2 = 0;
     while (count-- > 0) {
         ch1 = (FX_CHAR)FXSYS_tolower(*s1++);
         ch2 = (FX_CHAR)FXSYS_tolower(*s2++);
         if (ch1 != ch2) {
             break;
         }
     }
     return ch1 - ch2;
 }
 FX_DWORD FX_HashCode_String_GetA(const FX_CHAR* pStr, int32_t iLength, FX_BOOL bIgnoreCase)
 {
     FXSYS_assert(pStr != NULL);
     if (iLength < 0) {
         iLength = (int32_t)FXSYS_strlen(pStr);
     }
     const FX_CHAR* pStrEnd = pStr + iLength;
     FX_DWORD dwHashCode = 0;
     if (bIgnoreCase) {
         while (pStr < pStrEnd) {
             dwHashCode = 31 * dwHashCode + FXSYS_tolower(*pStr++);
         }
     } else {
         while (pStr < pStrEnd) {
             dwHashCode = 31 * dwHashCode + *pStr ++;
         }
     }
     return dwHashCode;
 }
 FX_DWORD FX_HashCode_String_GetW(const FX_WCHAR* pStr, int32_t iLength, FX_BOOL bIgnoreCase)
 {
     FXSYS_assert(pStr != NULL);
     if (iLength < 0) {
         iLength = (int32_t)FXSYS_wcslen(pStr);
     }
     const FX_WCHAR* pStrEnd = pStr + iLength;
     FX_DWORD dwHashCode = 0;
     if (bIgnoreCase) {
         while (pStr < pStrEnd) {
             dwHashCode = 1313 * dwHashCode + FXSYS_tolower(*pStr++);
         }
     } else {
         while (pStr < pStrEnd) {
             dwHashCode = 1313 * dwHashCode + *pStr ++;
         }
     }
     return dwHashCode;
 }
 #ifdef __cplusplus
 }
 #endif
 #ifdef __cplusplus
 extern "C" {
 #endif
 void* FX_Random_MT_Start(FX_DWORD dwSeed)
 {
     FX_LPMTRANDOMCONTEXT pContext = FX_Alloc(FX_MTRANDOMCONTEXT, 1);
     pContext->mt[0] = dwSeed;
     FX_DWORD &i = pContext->mti;
     FX_DWORD* pBuf = pContext->mt;
     for (i = 1; i < MT_N; i ++) {
         pBuf[i] = (1812433253UL * (pBuf[i - 1] ^ (pBuf[i - 1] >> 30)) + i);
     }
     pContext->bHaveSeed = TRUE;
     return pContext;
 }
 FX_DWORD FX_Random_MT_Generate(void* pContext)
 {
     FXSYS_assert(pContext != NULL);
     FX_LPMTRANDOMCONTEXT pMTC = (FX_LPMTRANDOMCONTEXT)pContext;
     FX_DWORD v;
     static FX_DWORD mag[2] = {0, MT_Matrix_A};
     FX_DWORD &mti = pMTC->mti;
     FX_DWORD* pBuf = pMTC->mt;
     if ((int)mti < 0 || mti >= MT_N) {
         if (mti > MT_N && !pMTC->bHaveSeed) {
             return 0;
         }
         FX_DWORD kk;
         for (kk = 0; kk < MT_N - MT_M; kk ++) {
             v = (pBuf[kk] & MT_Upper_Mask) | (pBuf[kk + 1] & MT_Lower_Mask);
             pBuf[kk] = pBuf[kk + MT_M] ^ (v >> 1) ^ mag[v & 1];
         }
         for (; kk < MT_N - 1; kk ++) {
             v = (pBuf[kk] & MT_Upper_Mask) | (pBuf[kk + 1] & MT_Lower_Mask);
             pBuf[kk] = pBuf[kk + (MT_M - MT_N)] ^ (v >> 1) ^ mag[v & 1];
         }
         v = (pBuf[MT_N - 1] & MT_Upper_Mask) | (pBuf[0] & MT_Lower_Mask);
         pBuf[MT_N - 1] = pBuf[MT_M - 1] ^ (v >> 1) ^ mag[v & 1];
         mti = 0;
     }
     v = pBuf[mti ++];
     v ^= (v >> 11);
     v ^= (v << 7) & 0x9d2c5680UL;
     v ^= (v << 15) & 0xefc60000UL;
     v ^= (v >> 18);
     return v;
 }
 void FX_Random_MT_Close(void* pContext)
 {
     FXSYS_assert(pContext != NULL);
     FX_Free(pContext);
 }
 void FX_Random_GenerateMT(FX_DWORD* pBuffer, int32_t iCount)
 {
     FX_DWORD dwSeed;
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
     if (!FX_GenerateCryptoRandom(&dwSeed, 1)) {
         FX_Random_GenerateBase(&dwSeed, 1);
     }
 #else
     FX_Random_GenerateBase(&dwSeed, 1);
 #endif
     void* pContext = FX_Random_MT_Start(dwSeed);
     while (iCount -- > 0) {
         *pBuffer ++ = FX_Random_MT_Generate(pContext);
     }
     FX_Random_MT_Close(pContext);
 }
 void FX_Random_GenerateBase(FX_DWORD* pBuffer, int32_t iCount)
 {
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
     SYSTEMTIME st1, st2;
     ::GetSystemTime(&st1);
     do {
         ::GetSystemTime(&st2);
     } while (FXSYS_memcmp32(&st1, &st2, sizeof(SYSTEMTIME)) == 0);
     FX_DWORD dwHash1 = FX_HashCode_String_GetA((const FX_CHAR*)&st1, sizeof(st1), TRUE);
     FX_DWORD dwHash2 = FX_HashCode_String_GetA((const FX_CHAR*)&st2, sizeof(st2), TRUE);
     ::srand((dwHash1 << 16) | (FX_DWORD)dwHash2);
 #else
     time_t tmLast = time(NULL), tmCur;
     while ((tmCur = time(NULL)) == tmLast);
     ::srand((tmCur << 16) | (tmLast & 0xFFFF));
 #endif
     while (iCount -- > 0) {
         *pBuffer ++ = (FX_DWORD)((::rand() << 16) | (::rand() & 0xFFFF));
     }
 }
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
 FX_BOOL FX_GenerateCryptoRandom(FX_DWORD* pBuffer, int32_t iCount)
 {
     HCRYPTPROV hCP = NULL;
     if (!::CryptAcquireContext(&hCP, NULL, NULL, PROV_RSA_FULL, 0) || hCP == NULL) {
         return FALSE;
     }
     ::CryptGenRandom(hCP, iCount * sizeof(FX_DWORD), (uint8_t*)pBuffer);
     ::CryptReleaseContext(hCP, 0);
     return TRUE;
 }
 #endif
 void FX_Random_GenerateCrypto(FX_DWORD* pBuffer, int32_t iCount)
 {
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
     FX_GenerateCryptoRandom(pBuffer, iCount);
 #else
     FX_Random_GenerateBase(pBuffer, iCount);
 #endif
 }
 #ifdef __cplusplus
 }
 #endif
	// Copyright 2014 PDFium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

	#include "../../include/fxcrt/fx_ext.h"
	#include "extension.h"
	#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
	#include <wincrypt.h>
	#else
	#include <ctime>
	#endif
	FX_HFILE FX_File_Open(const CFX_ByteStringC& fileName, FX_DWORD dwMode)
	{
	IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
	if (pFA && !pFA->Open(fileName, dwMode)) {
	pFA->Release();
	return NULL;
	}
	return (FX_HFILE)pFA;
	}
	FX_HFILE FX_File_Open(const CFX_WideStringC& fileName, FX_DWORD dwMode)
	{
	IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
	if (pFA && !pFA->Open(fileName, dwMode)) {
	pFA->Release();
	return NULL;
	}
	return (FX_HFILE)pFA;
	}
	void FX_File_Close(FX_HFILE hFile)
	{
	FXSYS_assert(hFile != NULL);
	((IFXCRT_FileAccess*)hFile)->Close();
	((IFXCRT_FileAccess*)hFile)->Release();
	}
	FX_FILESIZE FX_File_GetSize(FX_HFILE hFile)
	{
	FXSYS_assert(hFile != NULL);
	return ((IFXCRT_FileAccess*)hFile)->GetSize();
	}
	FX_FILESIZE FX_File_GetPosition(FX_HFILE hFile)
	{
	FXSYS_assert(hFile != NULL);
	return ((IFXCRT_FileAccess*)hFile)->GetPosition();
	}
	FX_FILESIZE FX_File_SetPosition(FX_HFILE hFile, FX_FILESIZE pos)
	{
	FXSYS_assert(hFile != NULL);
	return ((IFXCRT_FileAccess*)hFile)->SetPosition(pos);
	}
	size_t FX_File_Read(FX_HFILE hFile, void* pBuffer, size_t szBuffer)
	{
	FXSYS_assert(hFile != NULL);
	return ((IFXCRT_FileAccess*)hFile)->Read(pBuffer, szBuffer);
	}
	size_t FX_File_ReadPos(FX_HFILE hFile, void* pBuffer, size_t szBuffer, FX_FILESIZE pos)
	{
	FXSYS_assert(hFile != NULL);
	return ((IFXCRT_FileAccess*)hFile)->ReadPos(pBuffer, szBuffer, pos);
	}
	size_t FX_File_Write(FX_HFILE hFile, const void* pBuffer, size_t szBuffer)
	{
	FXSYS_assert(hFile != NULL);
	return ((IFXCRT_FileAccess*)hFile)->Write(pBuffer, szBuffer);
	}
	size_t FX_File_WritePos(FX_HFILE hFile, const void* pBuffer, size_t szBuffer, FX_FILESIZE pos)
	{
	FXSYS_assert(hFile != NULL);
	return ((IFXCRT_FileAccess*)hFile)->WritePos(pBuffer, szBuffer, pos);
	}
	FX_BOOL FX_File_Flush(FX_HFILE hFile)
	{
	FXSYS_assert(hFile != NULL);
	return ((IFXCRT_FileAccess*)hFile)->Flush();
	}
	FX_BOOL FX_File_Truncate(FX_HFILE hFile, FX_FILESIZE szFile)
	{
	FXSYS_assert(hFile != NULL);
	return ((IFXCRT_FileAccess*)hFile)->Truncate(szFile);
	}
	IFX_FileStream* FX_CreateFileStream(const FX_CHAR* filename, FX_DWORD dwModes)
	{
	IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
	if (!pFA) {
	return NULL;
	}
	if (!pFA->Open(filename, dwModes)) {
	pFA->Release();
	return NULL;
	}
	return new CFX_CRTFileStream(pFA);
	}
	IFX_FileStream* FX_CreateFileStream(const FX_WCHAR* filename, FX_DWORD dwModes)
	{
	IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
	if (!pFA) {
	return NULL;
	}
	if (!pFA->Open(filename, dwModes)) {
	pFA->Release();
	return NULL;
	}
	return new CFX_CRTFileStream(pFA);
	}
	IFX_FileWrite* FX_CreateFileWrite(const FX_CHAR* filename)
	{
	return FX_CreateFileStream(filename, FX_FILEMODE_Truncate);
	}
	IFX_FileWrite* FX_CreateFileWrite(const FX_WCHAR* filename)
	{
	return FX_CreateFileStream(filename, FX_FILEMODE_Truncate);
	}
	IFX_FileRead* FX_CreateFileRead(const FX_CHAR* filename)
	{
	return FX_CreateFileStream(filename, FX_FILEMODE_ReadOnly);
	}
	IFX_FileRead* FX_CreateFileRead(const FX_WCHAR* filename)
	{
	return FX_CreateFileStream(filename, FX_FILEMODE_ReadOnly);
	}
	IFX_MemoryStream* FX_CreateMemoryStream(uint8_t* pBuffer, size_t dwSize, FX_BOOL bTakeOver)
	{
	return new CFX_MemoryStream(pBuffer, dwSize, bTakeOver);
	}
	IFX_MemoryStream* FX_CreateMemoryStream(FX_BOOL bConsecutive)
	{
	return new CFX_MemoryStream(bConsecutive);
	}
	#ifdef __cplusplus
	extern "C" {
	#endif
	FX_FLOAT FXSYS_tan(FX_FLOAT a)
	{
	return (FX_FLOAT)tan(a);
	}
	FX_FLOAT FXSYS_logb(FX_FLOAT b, FX_FLOAT x)
	{
	return FXSYS_log(x) / FXSYS_log(b);
	}
	FX_FLOAT FXSYS_strtof(const FX_CHAR* pcsStr, int32_t iLength, int32_t *pUsedLen)
	{
	FXSYS_assert(pcsStr != NULL);
	if (iLength < 0) {
	iLength = (int32_t)FXSYS_strlen(pcsStr);
	}
	CFX_WideString ws = CFX_WideString::FromLocal(pcsStr, iLength);
	return FXSYS_wcstof(ws.c_str(), iLength, pUsedLen);
	}
	FX_FLOAT FXSYS_wcstof(const FX_WCHAR* pwsStr, int32_t iLength, int32_t *pUsedLen)
	{
	FXSYS_assert(pwsStr != NULL);
	if (iLength < 0) {
	iLength = (int32_t)FXSYS_wcslen(pwsStr);
	}
	if (iLength == 0) {
	return 0.0f;
	}
	int32_t iUsedLen = 0;
	FX_BOOL bNegtive = FALSE;
	switch (pwsStr[iUsedLen]) {
	case '-':
	bNegtive = TRUE;
	case '+':
	iUsedLen++;
	break;
	}
	FX_FLOAT fValue = 0.0f;
	while (iUsedLen < iLength) {
	FX_WCHAR wch = pwsStr[iUsedLen];
	if (wch >= L'0' && wch <= L'9') {
	fValue = fValue * 10.0f + (wch - L'0');
	} else {
	break;
	}
	iUsedLen++;
	}
	if (iUsedLen < iLength && pwsStr[iUsedLen] == L'.') {
	FX_FLOAT fPrecise = 0.1f;
	while (++iUsedLen < iLength) {
	FX_WCHAR wch = pwsStr[iUsedLen];
	if (wch >= L'0' && wch <= L'9') {
	fValue += (wch - L'0') * fPrecise;
	fPrecise *= 0.1f;
	} else {
	break;
	}
	}
	}
	if (pUsedLen) {
	*pUsedLen = iUsedLen;
	}
	return bNegtive ? -fValue : fValue;
	}
	FX_WCHAR* FXSYS_wcsncpy(FX_WCHAR* dstStr, const FX_WCHAR* srcStr, size_t count)
	{
	FXSYS_assert(dstStr != NULL && srcStr != NULL && count > 0);
	for (size_t i = 0; i < count; ++i)
	if ((dstStr[i] = srcStr[i]) == L'\0') {
	break;
	}
	return dstStr;
	}
	int32_t FXSYS_wcsnicmp(const FX_WCHAR* s1, const FX_WCHAR* s2, size_t count)
	{
	FXSYS_assert(s1 != NULL && s2 != NULL && count > 0);
	FX_WCHAR wch1 = 0, wch2 = 0;
	while (count-- > 0) {
	wch1 = (FX_WCHAR)FXSYS_tolower(*s1++);
	wch2 = (FX_WCHAR)FXSYS_tolower(*s2++);
	if (wch1 != wch2) {
	break;
	}
	}
	return wch1 - wch2;
	}
	int32_t FXSYS_strnicmp(const FX_CHAR* s1, const FX_CHAR* s2, size_t count)
	{
	FXSYS_assert(s1 != NULL && s2 != NULL && count > 0);
	FX_CHAR ch1 = 0, ch2 = 0;
	while (count-- > 0) {
	ch1 = (FX_CHAR)FXSYS_tolower(*s1++);
	ch2 = (FX_CHAR)FXSYS_tolower(*s2++);
	if (ch1 != ch2) {
	break;
	}
	}
	return ch1 - ch2;
	}
	FX_DWORD FX_HashCode_String_GetA(const FX_CHAR* pStr, int32_t iLength, FX_BOOL bIgnoreCase)
	{
	FXSYS_assert(pStr != NULL);
	if (iLength < 0) {
	iLength = (int32_t)FXSYS_strlen(pStr);
	}
	const FX_CHAR* pStrEnd = pStr + iLength;
	FX_DWORD dwHashCode = 0;
	if (bIgnoreCase) {
	while (pStr < pStrEnd) {
	dwHashCode = 31 * dwHashCode + FXSYS_tolower(*pStr++);
	}
	} else {
	while (pStr < pStrEnd) {
	dwHashCode = 31 * dwHashCode + *pStr ++;
	}
	}
	return dwHashCode;
	}
	FX_DWORD FX_HashCode_String_GetW(const FX_WCHAR* pStr, int32_t iLength, FX_BOOL bIgnoreCase)
	{
	FXSYS_assert(pStr != NULL);
	if (iLength < 0) {
	iLength = (int32_t)FXSYS_wcslen(pStr);
	}
	const FX_WCHAR* pStrEnd = pStr + iLength;
	FX_DWORD dwHashCode = 0;
	if (bIgnoreCase) {
	while (pStr < pStrEnd) {
	dwHashCode = 1313 * dwHashCode + FXSYS_tolower(*pStr++);
	}
	} else {
	while (pStr < pStrEnd) {
	dwHashCode = 1313 * dwHashCode + *pStr ++;
	}
	}
	return dwHashCode;
	}
	#ifdef __cplusplus
	}
	#endif
	#ifdef __cplusplus
	extern "C" {
	#endif
	void* FX_Random_MT_Start(FX_DWORD dwSeed)
	{
	FX_LPMTRANDOMCONTEXT pContext = FX_Alloc(FX_MTRANDOMCONTEXT, 1);
	pContext->mt[0] = dwSeed;
	FX_DWORD &i = pContext->mti;
	FX_DWORD* pBuf = pContext->mt;
	for (i = 1; i < MT_N; i ++) {
	pBuf[i] = (1812433253UL * (pBuf[i - 1] ^ (pBuf[i - 1] >> 30)) + i);
	}
	pContext->bHaveSeed = TRUE;
	return pContext;
	}
	FX_DWORD FX_Random_MT_Generate(void* pContext)
	{
	FXSYS_assert(pContext != NULL);
	FX_LPMTRANDOMCONTEXT pMTC = (FX_LPMTRANDOMCONTEXT)pContext;
	FX_DWORD v;
	static FX_DWORD mag[2] = {0, MT_Matrix_A};
	FX_DWORD &mti = pMTC->mti;
	FX_DWORD* pBuf = pMTC->mt;
	if ((int)mti < 0 \|\| mti >= MT_N) {
	if (mti > MT_N && !pMTC->bHaveSeed) {
	return 0;
	}
	FX_DWORD kk;
	for (kk = 0; kk < MT_N - MT_M; kk ++) {
	v = (pBuf[kk] & MT_Upper_Mask) \| (pBuf[kk + 1] & MT_Lower_Mask);
	pBuf[kk] = pBuf[kk + MT_M] ^ (v >> 1) ^ mag[v & 1];
	}
	for (; kk < MT_N - 1; kk ++) {
	v = (pBuf[kk] & MT_Upper_Mask) \| (pBuf[kk + 1] & MT_Lower_Mask);
	pBuf[kk] = pBuf[kk + (MT_M - MT_N)] ^ (v >> 1) ^ mag[v & 1];
	}
	v = (pBuf[MT_N - 1] & MT_Upper_Mask) \| (pBuf[0] & MT_Lower_Mask);
	pBuf[MT_N - 1] = pBuf[MT_M - 1] ^ (v >> 1) ^ mag[v & 1];
	mti = 0;
	}
	v = pBuf[mti ++];
	v ^= (v >> 11);
	v ^= (v << 7) & 0x9d2c5680UL;
	v ^= (v << 15) & 0xefc60000UL;
	v ^= (v >> 18);
	return v;
	}
	void FX_Random_MT_Close(void* pContext)
	{
	FXSYS_assert(pContext != NULL);
	FX_Free(pContext);
	}
	void FX_Random_GenerateMT(FX_DWORD* pBuffer, int32_t iCount)
	{
	FX_DWORD dwSeed;
	#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
	if (!FX_GenerateCryptoRandom(&dwSeed, 1)) {
	FX_Random_GenerateBase(&dwSeed, 1);
	}
	#else
	FX_Random_GenerateBase(&dwSeed, 1);
	#endif
	void* pContext = FX_Random_MT_Start(dwSeed);
	while (iCount -- > 0) {
	*pBuffer ++ = FX_Random_MT_Generate(pContext);
	}
	FX_Random_MT_Close(pContext);
	}
	void FX_Random_GenerateBase(FX_DWORD* pBuffer, int32_t iCount)
	{
	#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
	SYSTEMTIME st1, st2;
	::GetSystemTime(&st1);
	do {
	::GetSystemTime(&st2);
	} while (FXSYS_memcmp32(&st1, &st2, sizeof(SYSTEMTIME)) == 0);
	FX_DWORD dwHash1 = FX_HashCode_String_GetA((const FX_CHAR*)&st1, sizeof(st1), TRUE);
	FX_DWORD dwHash2 = FX_HashCode_String_GetA((const FX_CHAR*)&st2, sizeof(st2), TRUE);
	::srand((dwHash1 << 16) \| (FX_DWORD)dwHash2);
	#else
	time_t tmLast = time(NULL), tmCur;
	while ((tmCur = time(NULL)) == tmLast);
	::srand((tmCur << 16) \| (tmLast & 0xFFFF));
	#endif
	while (iCount -- > 0) {
	*pBuffer ++ = (FX_DWORD)((::rand() << 16) \| (::rand() & 0xFFFF));
	}
	}
	#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
	FX_BOOL FX_GenerateCryptoRandom(FX_DWORD* pBuffer, int32_t iCount)
	{
	HCRYPTPROV hCP = NULL;
	if (!::CryptAcquireContext(&hCP, NULL, NULL, PROV_RSA_FULL, 0) \|\| hCP == NULL) {
	return FALSE;
	}
	::CryptGenRandom(hCP, iCount * sizeof(FX_DWORD), (uint8_t*)pBuffer);
	::CryptReleaseContext(hCP, 0);
	return TRUE;
	}
	#endif
	void FX_Random_GenerateCrypto(FX_DWORD* pBuffer, int32_t iCount)
	{
	#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
	FX_GenerateCryptoRandom(pBuffer, iCount);
	#else
	FX_Random_GenerateBase(pBuffer, iCount);
	#endif
	}
	#ifdef __cplusplus
	}
	#endif