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 "../../../include/fpdfapi/fpdf_resource.h" 8 #include "../../../include/fpdfapi/fpdf_module.h" 9 #include "../fpdf_font/font_int.h" 10 #include "cmap_int.h" 11 void FPDFAPI_FindEmbeddedCMap(const char* name, int charset, int coding, const FXCMAP_CMap*& pMap) 12 { 13 pMap = NULL; 14 CPDF_FontGlobals* pFontGlobals = CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals(); 15 const FXCMAP_CMap* pCMaps = pFontGlobals->m_EmbeddedCharsets[charset].m_pMapList; 16 int nCMaps = pFontGlobals->m_EmbeddedCharsets[charset].m_Count; 17 for (int i = 0; i < nCMaps; i ++) { 18 if (FXSYS_strcmp(name, pCMaps[i].m_Name)) { 19 continue; 20 } 21 pMap = &pCMaps[i]; 22 break; 23 } 24 } 25 extern "C" { 26 static int compareWord(const void* p1, const void* p2) 27 { 28 return (*(FX_WORD*)p1) - (*(FX_WORD*)p2); 29 } 30 }; 31 extern "C" { 32 static int compareWordRange(const void* key, const void* element) 33 { 34 if (*(FX_WORD*)key < * (FX_WORD*)element) { 35 return -1; 36 } 37 if (*(FX_WORD*)key > ((FX_WORD*)element)[1]) { 38 return 1; 39 } 40 return 0; 41 } 42 }; 43 extern "C" { 44 static int compareDWordRange(const void* p1, const void* p2) 45 { 46 FX_DWORD key = *(FX_DWORD*)p1; 47 FX_WORD hiword = (FX_WORD)(key >> 16); 48 FX_WORD* element = (FX_WORD*)p2; 49 if (hiword < element[0]) { 50 return -1; 51 } 52 if (hiword > element[0]) { 53 return 1; 54 } 55 FX_WORD loword = (FX_WORD)key; 56 if (loword < element[1]) { 57 return -1; 58 } 59 if (loword > element[2]) { 60 return 1; 61 } 62 return 0; 63 } 64 }; 65 extern "C" { 66 static int compareDWordSingle(const void* p1, const void* p2) 67 { 68 FX_DWORD key = *(FX_DWORD*)p1; 69 FX_DWORD value = ((*(FX_WORD*)p2) << 16) | ((FX_WORD*)p2)[1]; 70 if (key < value) { 71 return -1; 72 } 73 if (key > value) { 74 return 1; 75 } 76 return 0; 77 } 78 }; 79 FX_WORD FPDFAPI_CIDFromCharCode(const FXCMAP_CMap* pMap, FX_DWORD charcode) 80 { 81 if (charcode >> 16) { 82 while (1) { 83 if (pMap->m_DWordMapType == FXCMAP_CMap::Range) { 84 FX_WORD* found = (FX_WORD*)FXSYS_bsearch(&charcode, pMap->m_pDWordMap, pMap->m_DWordCount, 8, compareDWordRange); 85 if (found) { 86 return found[3] + (FX_WORD)charcode - found[1]; 87 } 88 } else if (pMap->m_DWordMapType == FXCMAP_CMap::Single) { 89 FX_WORD* found = (FX_WORD*)FXSYS_bsearch(&charcode, pMap->m_pDWordMap, pMap->m_DWordCount, 6, compareDWordSingle); 90 if (found) { 91 return found[2]; 92 } 93 } 94 if (pMap->m_UseOffset == 0) { 95 return 0; 96 } 97 pMap = pMap + pMap->m_UseOffset; 98 } 99 return 0; 100 } 101 FX_WORD code = (FX_WORD)charcode; 102 while (1) { 103 if (pMap->m_pWordMap == NULL) { 104 return 0; 105 } 106 if (pMap->m_WordMapType == FXCMAP_CMap::Single) { 107 FX_WORD* found = (FX_WORD*)FXSYS_bsearch(&code, pMap->m_pWordMap, pMap->m_WordCount, 4, compareWord); 108 if (found) { 109 return found[1]; 110 } 111 } else if (pMap->m_WordMapType == FXCMAP_CMap::Range) { 112 FX_WORD* found = (FX_WORD*)FXSYS_bsearch(&code, pMap->m_pWordMap, pMap->m_WordCount, 6, compareWordRange); 113 if (found) { 114 return found[2] + code - found[0]; 115 } 116 } 117 if (pMap->m_UseOffset == 0) { 118 return 0; 119 } 120 pMap = pMap + pMap->m_UseOffset; 121 } 122 return 0; 123 } 124 FX_DWORD FPDFAPI_CharCodeFromCID(const FXCMAP_CMap* pMap, FX_WORD cid) 125 { 126 while (1) { 127 if (pMap->m_WordMapType == FXCMAP_CMap::Single) { 128 const FX_WORD *pCur = pMap->m_pWordMap; 129 const FX_WORD *pEnd = pMap->m_pWordMap + pMap->m_WordCount * 2; 130 while (pCur < pEnd) { 131 if (pCur[1] == cid) { 132 return pCur[0]; 133 } 134 pCur += 2; 135 } 136 } else if (pMap->m_WordMapType == FXCMAP_CMap::Range) { 137 const FX_WORD *pCur = pMap->m_pWordMap; 138 const FX_WORD *pEnd = pMap->m_pWordMap + pMap->m_WordCount * 3; 139 while (pCur < pEnd) { 140 if (cid >= pCur[2] && cid <= pCur[2] + pCur[1] - pCur[0]) { 141 return pCur[0] + cid - pCur[2]; 142 } 143 pCur += 3; 144 } 145 } 146 if (pMap->m_UseOffset == 0) { 147 return 0; 148 } 149 pMap = pMap + pMap->m_UseOffset; 150 } 151 while (1) { 152 if (pMap->m_DWordMapType == FXCMAP_CMap::Range) { 153 const FX_WORD *pCur = pMap->m_pDWordMap; 154 const FX_WORD *pEnd = pMap->m_pDWordMap + pMap->m_DWordCount * 4; 155 while (pCur < pEnd) { 156 if (cid >= pCur[3] && cid <= pCur[3] + pCur[2] - pCur[1]) { 157 return (((FX_DWORD)pCur[0] << 16) | pCur[1]) + cid - pCur[3]; 158 } 159 pCur += 4; 160 } 161 } else if (pMap->m_DWordMapType == FXCMAP_CMap::Single) { 162 const FX_WORD *pCur = pMap->m_pDWordMap; 163 const FX_WORD *pEnd = pMap->m_pDWordMap + pMap->m_DWordCount * 3; 164 while (pCur < pEnd) { 165 if (pCur[2] == cid) { 166 return ((FX_DWORD)pCur[0] << 16) | pCur[1]; 167 } 168 pCur += 3; 169 } 170 } 171 if (pMap->m_UseOffset == 0) { 172 return 0; 173 } 174 pMap = pMap + pMap->m_UseOffset; 175 } 176 return 0; 177 } 178 void FPDFAPI_LoadCID2UnicodeMap(int charset, const FX_WORD*& pMap, FX_DWORD& count) 179 { 180 CPDF_FontGlobals* pFontGlobals = CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals(); 181 pMap = pFontGlobals->m_EmbeddedToUnicodes[charset].m_pMap; 182 count = pFontGlobals->m_EmbeddedToUnicodes[charset].m_Count; 183 } 184
