diff options
Diffstat (limited to 'xfa/fgas/crt/fgas_encode.cpp')
| -rw-r--r-- | xfa/fgas/crt/fgas_encode.cpp | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/xfa/fgas/crt/fgas_encode.cpp b/xfa/fgas/crt/fgas_encode.cpp new file mode 100644 index 0000000000..138b4b1f5e --- /dev/null +++ b/xfa/fgas/crt/fgas_encode.cpp @@ -0,0 +1,193 @@ +// 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 "xfa/fgas/crt/fgas_codepage.h" + +void FX_SwapByteOrder(FX_WCHAR* pStr, int32_t iLength) { + FXSYS_assert(pStr != NULL); + if (iLength < 0) { + iLength = FXSYS_wcslen(pStr); + } + FX_WORD wch; + if (sizeof(FX_WCHAR) > 2) { + while (iLength-- > 0) { + wch = (FX_WORD)*pStr; + wch = (wch >> 8) | (wch << 8); + wch &= 0x00FF; + *pStr++ = wch; + } + } else { + while (iLength-- > 0) { + wch = (FX_WORD)*pStr; + wch = (wch >> 8) | (wch << 8); + *pStr++ = wch; + } + } +} +void FX_SwapByteOrderCopy(const FX_WCHAR* pSrc, + FX_WCHAR* pDst, + int32_t iLength) { + FXSYS_assert(pSrc != NULL && pDst != NULL); + if (iLength < 0) { + iLength = FXSYS_wcslen(pSrc); + } + FX_WORD wch; + if (sizeof(FX_WCHAR) > 2) { + while (iLength-- > 0) { + wch = (FX_WORD)*pSrc++; + wch = (wch >> 8) | (wch << 8); + wch &= 0x00FF; + *pDst++ = wch; + } + } else { + while (iLength-- > 0) { + wch = (FX_WORD)*pSrc++; + wch = (wch >> 8) | (wch << 8); + *pDst++ = wch; + } + } +} +void FX_UTF16ToWChar(void* pBuffer, int32_t iLength) { + FXSYS_assert(pBuffer != NULL && iLength > 0); + if (sizeof(FX_WCHAR) == 2) { + return; + } + FX_WORD* pSrc = (FX_WORD*)pBuffer; + FX_WCHAR* pDst = (FX_WCHAR*)pBuffer; + while (--iLength >= 0) { + pDst[iLength] = (FX_WCHAR)pSrc[iLength]; + } +} +void FX_UTF16ToWCharCopy(const FX_WORD* pUTF16, + FX_WCHAR* pWChar, + int32_t iLength) { + FXSYS_assert(pUTF16 != NULL && pWChar != NULL && iLength > 0); + if (sizeof(FX_WCHAR) == 2) { + FXSYS_memcpy(pWChar, pUTF16, iLength * sizeof(FX_WCHAR)); + } else { + while (--iLength >= 0) { + pWChar[iLength] = (FX_WCHAR)pUTF16[iLength]; + } + } +} +void FX_WCharToUTF16(void* pBuffer, int32_t iLength) { + FXSYS_assert(pBuffer != NULL && iLength > 0); + if (sizeof(FX_WCHAR) == 2) { + return; + } + const FX_WCHAR* pSrc = (const FX_WCHAR*)pBuffer; + FX_WORD* pDst = (FX_WORD*)pBuffer; + while (--iLength >= 0) { + *pDst++ = (FX_WORD)*pSrc++; + } +} +void FX_WCharToUTF16Copy(const FX_WCHAR* pWChar, + FX_WORD* pUTF16, + int32_t iLength) { + FXSYS_assert(pWChar != NULL && pUTF16 != NULL && iLength > 0); + if (sizeof(FX_WCHAR) == 2) { + FXSYS_memcpy(pUTF16, pWChar, iLength * sizeof(FX_WCHAR)); + } else { + while (--iLength >= 0) { + *pUTF16++ = (FX_WORD)*pWChar++; + } + } +} +inline FX_DWORD FX_DWordFromBytes(const uint8_t* pStr) { + return FXBSTR_ID(pStr[3], pStr[2], pStr[1], pStr[0]); +} +inline FX_WORD FX_WordFromBytes(const uint8_t* pStr) { + return (pStr[1] << 8 | pStr[0]); +} +int32_t FX_DecodeString(FX_WORD wCodePage, + const FX_CHAR* pSrc, + int32_t* pSrcLen, + FX_WCHAR* pDst, + int32_t* pDstLen, + FX_BOOL bErrBreak) { + if (wCodePage == FX_CODEPAGE_UTF8) { + return FX_UTF8Decode(pSrc, pSrcLen, pDst, pDstLen); + } + return -1; +} +int32_t FX_UTF8Decode(const FX_CHAR* pSrc, + int32_t* pSrcLen, + FX_WCHAR* pDst, + int32_t* pDstLen) { + if (pSrcLen == NULL || pDstLen == NULL) { + return -1; + } + int32_t iSrcLen = *pSrcLen; + if (iSrcLen < 1) { + *pSrcLen = *pDstLen = 0; + return 1; + } + int32_t iDstLen = *pDstLen; + FX_BOOL bValidDst = (pDst != NULL && iDstLen > 0); + FX_DWORD dwCode = 0; + int32_t iPending = 0; + int32_t iSrcNum = 0, iDstNum = 0; + int32_t k = 0; + int32_t iIndex = 0; + k = 1; + while (iIndex < iSrcLen) { + uint8_t byte = (uint8_t) * (pSrc + iIndex); + if (byte < 0x80) { + iPending = 0; + k = 1; + iDstNum++; + iSrcNum += k; + if (bValidDst) { + *pDst++ = byte; + if (iDstNum >= iDstLen) { + break; + } + } + } else if (byte < 0xc0) { + if (iPending < 1) { + break; + } + iPending--; + dwCode |= (byte & 0x3f) << (iPending * 6); + if (iPending == 0) { + iDstNum++; + iSrcNum += k; + if (bValidDst) { + *pDst++ = dwCode; + if (iDstNum >= iDstLen) { + break; + } + } + } + } else if (byte < 0xe0) { + iPending = 1; + k = 2; + dwCode = (byte & 0x1f) << 6; + } else if (byte < 0xf0) { + iPending = 2; + k = 3; + dwCode = (byte & 0x0f) << 12; + } else if (byte < 0xf8) { + iPending = 3; + k = 4; + dwCode = (byte & 0x07) << 18; + } else if (byte < 0xfc) { + iPending = 4; + k = 5; + dwCode = (byte & 0x03) << 24; + } else if (byte < 0xfe) { + iPending = 5; + k = 6; + dwCode = (byte & 0x01) << 30; + } else { + break; + } + iIndex++; + } + *pSrcLen = iSrcNum; + *pDstLen = iDstNum; + return 1; +} |