diff options
Diffstat (limited to 'core/fpdfapi/fpdf_cmaps/fpdf_cmaps.cpp')
-rw-r--r-- | core/fpdfapi/fpdf_cmaps/fpdf_cmaps.cpp | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/core/fpdfapi/fpdf_cmaps/fpdf_cmaps.cpp b/core/fpdfapi/fpdf_cmaps/fpdf_cmaps.cpp new file mode 100644 index 0000000000..eed376db71 --- /dev/null +++ b/core/fpdfapi/fpdf_cmaps/fpdf_cmaps.cpp @@ -0,0 +1,192 @@ +// 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 "core/fpdfapi/fpdf_cmaps/cmap_int.h" + +#include "core/fpdfapi/fpdf_font/font_int.h" +#include "core/include/fpdfapi/fpdf_module.h" +#include "core/include/fpdfapi/fpdf_resource.h" + +void FPDFAPI_FindEmbeddedCMap(const char* name, + int charset, + int coding, + const FXCMAP_CMap*& pMap) { + pMap = NULL; + CPDF_FontGlobals* pFontGlobals = + CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals(); + const FXCMAP_CMap* pCMaps = + pFontGlobals->m_EmbeddedCharsets[charset].m_pMapList; + int nCMaps = pFontGlobals->m_EmbeddedCharsets[charset].m_Count; + for (int i = 0; i < nCMaps; i++) { + if (FXSYS_strcmp(name, pCMaps[i].m_Name)) { + continue; + } + pMap = &pCMaps[i]; + break; + } +} +extern "C" { +static int compareWord(const void* p1, const void* p2) { + return (*(FX_WORD*)p1) - (*(FX_WORD*)p2); +} +}; +extern "C" { +static int compareWordRange(const void* key, const void* element) { + if (*(FX_WORD*)key < *(FX_WORD*)element) { + return -1; + } + if (*(FX_WORD*)key > ((FX_WORD*)element)[1]) { + return 1; + } + return 0; +} +}; +extern "C" { +static int compareDWordRange(const void* p1, const void* p2) { + FX_DWORD key = *(FX_DWORD*)p1; + FX_WORD hiword = (FX_WORD)(key >> 16); + FX_WORD* element = (FX_WORD*)p2; + if (hiword < element[0]) { + return -1; + } + if (hiword > element[0]) { + return 1; + } + FX_WORD loword = (FX_WORD)key; + if (loword < element[1]) { + return -1; + } + if (loword > element[2]) { + return 1; + } + return 0; +} +}; +extern "C" { +static int compareDWordSingle(const void* p1, const void* p2) { + FX_DWORD key = *(FX_DWORD*)p1; + FX_DWORD value = ((*(FX_WORD*)p2) << 16) | ((FX_WORD*)p2)[1]; + if (key < value) { + return -1; + } + if (key > value) { + return 1; + } + return 0; +} +}; +FX_WORD FPDFAPI_CIDFromCharCode(const FXCMAP_CMap* pMap, FX_DWORD charcode) { + if (charcode >> 16) { + while (1) { + if (pMap->m_DWordMapType == FXCMAP_CMap::Range) { + FX_WORD* found = + (FX_WORD*)FXSYS_bsearch(&charcode, pMap->m_pDWordMap, + pMap->m_DWordCount, 8, compareDWordRange); + if (found) { + return found[3] + (FX_WORD)charcode - found[1]; + } + } else if (pMap->m_DWordMapType == FXCMAP_CMap::Single) { + FX_WORD* found = + (FX_WORD*)FXSYS_bsearch(&charcode, pMap->m_pDWordMap, + pMap->m_DWordCount, 6, compareDWordSingle); + if (found) { + return found[2]; + } + } + if (pMap->m_UseOffset == 0) { + return 0; + } + pMap = pMap + pMap->m_UseOffset; + } + return 0; + } + FX_WORD code = (FX_WORD)charcode; + while (1) { + if (!pMap->m_pWordMap) { + return 0; + } + if (pMap->m_WordMapType == FXCMAP_CMap::Single) { + FX_WORD* found = (FX_WORD*)FXSYS_bsearch( + &code, pMap->m_pWordMap, pMap->m_WordCount, 4, compareWord); + if (found) { + return found[1]; + } + } else if (pMap->m_WordMapType == FXCMAP_CMap::Range) { + FX_WORD* found = (FX_WORD*)FXSYS_bsearch( + &code, pMap->m_pWordMap, pMap->m_WordCount, 6, compareWordRange); + if (found) { + return found[2] + code - found[0]; + } + } + if (pMap->m_UseOffset == 0) { + return 0; + } + pMap = pMap + pMap->m_UseOffset; + } + return 0; +} +FX_DWORD FPDFAPI_CharCodeFromCID(const FXCMAP_CMap* pMap, FX_WORD cid) { + while (1) { + if (pMap->m_WordMapType == FXCMAP_CMap::Single) { + const FX_WORD* pCur = pMap->m_pWordMap; + const FX_WORD* pEnd = pMap->m_pWordMap + pMap->m_WordCount * 2; + while (pCur < pEnd) { + if (pCur[1] == cid) { + return pCur[0]; + } + pCur += 2; + } + } else if (pMap->m_WordMapType == FXCMAP_CMap::Range) { + const FX_WORD* pCur = pMap->m_pWordMap; + const FX_WORD* pEnd = pMap->m_pWordMap + pMap->m_WordCount * 3; + while (pCur < pEnd) { + if (cid >= pCur[2] && cid <= pCur[2] + pCur[1] - pCur[0]) { + return pCur[0] + cid - pCur[2]; + } + pCur += 3; + } + } + if (pMap->m_UseOffset == 0) { + return 0; + } + pMap = pMap + pMap->m_UseOffset; + } + while (1) { + if (pMap->m_DWordMapType == FXCMAP_CMap::Range) { + const FX_WORD* pCur = pMap->m_pDWordMap; + const FX_WORD* pEnd = pMap->m_pDWordMap + pMap->m_DWordCount * 4; + while (pCur < pEnd) { + if (cid >= pCur[3] && cid <= pCur[3] + pCur[2] - pCur[1]) { + return (((FX_DWORD)pCur[0] << 16) | pCur[1]) + cid - pCur[3]; + } + pCur += 4; + } + } else if (pMap->m_DWordMapType == FXCMAP_CMap::Single) { + const FX_WORD* pCur = pMap->m_pDWordMap; + const FX_WORD* pEnd = pMap->m_pDWordMap + pMap->m_DWordCount * 3; + while (pCur < pEnd) { + if (pCur[2] == cid) { + return ((FX_DWORD)pCur[0] << 16) | pCur[1]; + } + pCur += 3; + } + } + if (pMap->m_UseOffset == 0) { + return 0; + } + pMap = pMap + pMap->m_UseOffset; + } + return 0; +} + +void FPDFAPI_LoadCID2UnicodeMap(CIDSet charset, + const FX_WORD*& pMap, + FX_DWORD& count) { + CPDF_FontGlobals* pFontGlobals = + CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals(); + pMap = pFontGlobals->m_EmbeddedToUnicodes[charset].m_pMap; + count = pFontGlobals->m_EmbeddedToUnicodes[charset].m_Count; +} |