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| 1 // Copyright 2014 PDFium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
| 6 | |
| 7 #include "xfa/fgas/crt/fgas_codepage.h" | |
| 8 | |
| 9 void FX_SwapByteOrder(FX_WCHAR* pStr, int32_t iLength) { | |
| 10 ASSERT(pStr != NULL); | |
| 11 if (iLength < 0) { | |
| 12 iLength = FXSYS_wcslen(pStr); | |
| 13 } | |
| 14 uint16_t wch; | |
| 15 if (sizeof(FX_WCHAR) > 2) { | |
| 16 while (iLength-- > 0) { | |
| 17 wch = (uint16_t)*pStr; | |
| 18 wch = (wch >> 8) | (wch << 8); | |
| 19 wch &= 0x00FF; | |
| 20 *pStr++ = wch; | |
| 21 } | |
| 22 } else { | |
| 23 while (iLength-- > 0) { | |
| 24 wch = (uint16_t)*pStr; | |
| 25 wch = (wch >> 8) | (wch << 8); | |
| 26 *pStr++ = wch; | |
| 27 } | |
| 28 } | |
| 29 } | |
| 30 void FX_SwapByteOrderCopy(const FX_WCHAR* pSrc, | |
| 31 FX_WCHAR* pDst, | |
| 32 int32_t iLength) { | |
| 33 ASSERT(pSrc != NULL && pDst != NULL); | |
| 34 if (iLength < 0) { | |
| 35 iLength = FXSYS_wcslen(pSrc); | |
| 36 } | |
| 37 uint16_t wch; | |
| 38 if (sizeof(FX_WCHAR) > 2) { | |
| 39 while (iLength-- > 0) { | |
| 40 wch = (uint16_t)*pSrc++; | |
| 41 wch = (wch >> 8) | (wch << 8); | |
| 42 wch &= 0x00FF; | |
| 43 *pDst++ = wch; | |
| 44 } | |
| 45 } else { | |
| 46 while (iLength-- > 0) { | |
| 47 wch = (uint16_t)*pSrc++; | |
| 48 wch = (wch >> 8) | (wch << 8); | |
| 49 *pDst++ = wch; | |
| 50 } | |
| 51 } | |
| 52 } | |
| 53 void FX_UTF16ToWChar(void* pBuffer, int32_t iLength) { | |
| 54 ASSERT(pBuffer != NULL && iLength > 0); | |
| 55 if (sizeof(FX_WCHAR) == 2) { | |
| 56 return; | |
| 57 } | |
| 58 uint16_t* pSrc = (uint16_t*)pBuffer; | |
| 59 FX_WCHAR* pDst = (FX_WCHAR*)pBuffer; | |
| 60 while (--iLength >= 0) { | |
| 61 pDst[iLength] = (FX_WCHAR)pSrc[iLength]; | |
| 62 } | |
| 63 } | |
| 64 void FX_UTF16ToWCharCopy(const uint16_t* pUTF16, | |
| 65 FX_WCHAR* pWChar, | |
| 66 int32_t iLength) { | |
| 67 ASSERT(pUTF16 != NULL && pWChar != NULL && iLength > 0); | |
| 68 if (sizeof(FX_WCHAR) == 2) { | |
| 69 FXSYS_memcpy(pWChar, pUTF16, iLength * sizeof(FX_WCHAR)); | |
| 70 } else { | |
| 71 while (--iLength >= 0) { | |
| 72 pWChar[iLength] = (FX_WCHAR)pUTF16[iLength]; | |
| 73 } | |
| 74 } | |
| 75 } | |
| 76 void FX_WCharToUTF16(void* pBuffer, int32_t iLength) { | |
| 77 ASSERT(pBuffer != NULL && iLength > 0); | |
| 78 if (sizeof(FX_WCHAR) == 2) { | |
| 79 return; | |
| 80 } | |
| 81 const FX_WCHAR* pSrc = (const FX_WCHAR*)pBuffer; | |
| 82 uint16_t* pDst = (uint16_t*)pBuffer; | |
| 83 while (--iLength >= 0) { | |
| 84 *pDst++ = (uint16_t)*pSrc++; | |
| 85 } | |
| 86 } | |
| 87 void FX_WCharToUTF16Copy(const FX_WCHAR* pWChar, | |
| 88 uint16_t* pUTF16, | |
| 89 int32_t iLength) { | |
| 90 ASSERT(pWChar != NULL && pUTF16 != NULL && iLength > 0); | |
| 91 if (sizeof(FX_WCHAR) == 2) { | |
| 92 FXSYS_memcpy(pUTF16, pWChar, iLength * sizeof(FX_WCHAR)); | |
| 93 } else { | |
| 94 while (--iLength >= 0) { | |
| 95 *pUTF16++ = (uint16_t)*pWChar++; | |
| 96 } | |
| 97 } | |
| 98 } | |
| 99 inline uint32_t FX_DWordFromBytes(const uint8_t* pStr) { | |
| 100 return FXBSTR_ID(pStr[3], pStr[2], pStr[1], pStr[0]); | |
| 101 } | |
| 102 inline uint16_t FX_WordFromBytes(const uint8_t* pStr) { | |
| 103 return (pStr[1] << 8 | pStr[0]); | |
| 104 } | |
| 105 int32_t FX_DecodeString(uint16_t wCodePage, | |
| 106 const FX_CHAR* pSrc, | |
| 107 int32_t* pSrcLen, | |
| 108 FX_WCHAR* pDst, | |
| 109 int32_t* pDstLen, | |
| 110 FX_BOOL bErrBreak) { | |
| 111 if (wCodePage == FX_CODEPAGE_UTF8) { | |
| 112 return FX_UTF8Decode(pSrc, pSrcLen, pDst, pDstLen); | |
| 113 } | |
| 114 return -1; | |
| 115 } | |
| 116 int32_t FX_UTF8Decode(const FX_CHAR* pSrc, | |
| 117 int32_t* pSrcLen, | |
| 118 FX_WCHAR* pDst, | |
| 119 int32_t* pDstLen) { | |
| 120 if (pSrcLen == NULL || pDstLen == NULL) { | |
| 121 return -1; | |
| 122 } | |
| 123 int32_t iSrcLen = *pSrcLen; | |
| 124 if (iSrcLen < 1) { | |
| 125 *pSrcLen = *pDstLen = 0; | |
| 126 return 1; | |
| 127 } | |
| 128 int32_t iDstLen = *pDstLen; | |
| 129 FX_BOOL bValidDst = (pDst != NULL && iDstLen > 0); | |
| 130 uint32_t dwCode = 0; | |
| 131 int32_t iPending = 0; | |
| 132 int32_t iSrcNum = 0, iDstNum = 0; | |
| 133 int32_t k = 0; | |
| 134 int32_t iIndex = 0; | |
| 135 k = 1; | |
| 136 while (iIndex < iSrcLen) { | |
| 137 uint8_t byte = (uint8_t) * (pSrc + iIndex); | |
| 138 if (byte < 0x80) { | |
| 139 iPending = 0; | |
| 140 k = 1; | |
| 141 iDstNum++; | |
| 142 iSrcNum += k; | |
| 143 if (bValidDst) { | |
| 144 *pDst++ = byte; | |
| 145 if (iDstNum >= iDstLen) { | |
| 146 break; | |
| 147 } | |
| 148 } | |
| 149 } else if (byte < 0xc0) { | |
| 150 if (iPending < 1) { | |
| 151 break; | |
| 152 } | |
| 153 iPending--; | |
| 154 dwCode |= (byte & 0x3f) << (iPending * 6); | |
| 155 if (iPending == 0) { | |
| 156 iDstNum++; | |
| 157 iSrcNum += k; | |
| 158 if (bValidDst) { | |
| 159 *pDst++ = dwCode; | |
| 160 if (iDstNum >= iDstLen) { | |
| 161 break; | |
| 162 } | |
| 163 } | |
| 164 } | |
| 165 } else if (byte < 0xe0) { | |
| 166 iPending = 1; | |
| 167 k = 2; | |
| 168 dwCode = (byte & 0x1f) << 6; | |
| 169 } else if (byte < 0xf0) { | |
| 170 iPending = 2; | |
| 171 k = 3; | |
| 172 dwCode = (byte & 0x0f) << 12; | |
| 173 } else if (byte < 0xf8) { | |
| 174 iPending = 3; | |
| 175 k = 4; | |
| 176 dwCode = (byte & 0x07) << 18; | |
| 177 } else if (byte < 0xfc) { | |
| 178 iPending = 4; | |
| 179 k = 5; | |
| 180 dwCode = (byte & 0x03) << 24; | |
| 181 } else if (byte < 0xfe) { | |
| 182 iPending = 5; | |
| 183 k = 6; | |
| 184 dwCode = (byte & 0x01) << 30; | |
| 185 } else { | |
| 186 break; | |
| 187 } | |
| 188 iIndex++; | |
| 189 } | |
| 190 *pSrcLen = iSrcNum; | |
| 191 *pDstLen = iDstNum; | |
| 192 return 1; | |
| 193 } | |
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Chromium Code Reviews
Issue 1992033002:
fgas/ code cleanup. (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master