diff options
Diffstat (limited to 'filters/kword/pdf/xpdf/xpdf/CharCodeToUnicode.cpp')
| -rw-r--r-- | filters/kword/pdf/xpdf/xpdf/CharCodeToUnicode.cpp | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/filters/kword/pdf/xpdf/xpdf/CharCodeToUnicode.cpp b/filters/kword/pdf/xpdf/xpdf/CharCodeToUnicode.cpp new file mode 100644 index 000000000..1a01b37d6 --- /dev/null +++ b/filters/kword/pdf/xpdf/xpdf/CharCodeToUnicode.cpp @@ -0,0 +1,392 @@ +//======================================================================== +// +// CharCodeToUnicode.cpp +// +// Copyright 2001-2002 Glyph & Cog, LLC +// +//======================================================================== + +#include <aconf.h> + +#ifdef USE_GCC_PRAGMAS +#pragma implementation +#endif + +#include <stdio.h> +#include <string.h> +#include "gmem.h" +#include "gfile.h" +#include "GString.h" +#include "Error.h" +#include "GlobalParams.h" +#include "PSTokenizer.h" +#include "CharCodeToUnicode.h" + +//------------------------------------------------------------------------ + +#define maxUnicodeString 8 + +struct CharCodeToUnicodeString { + CharCode c; + Unicode u[maxUnicodeString]; + int len; +}; + +//------------------------------------------------------------------------ + +static int getCharFromString(void *data) { + char *p; + int c; + + p = *(char **)data; + if (*p) { + c = *p++; + *(char **)data = p; + } else { + c = EOF; + } + return c; +} + +static int getCharFromFile(void *data) { + return fgetc((FILE *)data); +} + +//------------------------------------------------------------------------ + +CharCodeToUnicode *CharCodeToUnicode::parseCIDToUnicode(GString *collectionA) { + FILE *f; + Unicode *mapA; + CharCode size, mapLenA; + char buf[64]; + Unicode u; + CharCodeToUnicode *ctu; + + if (!(f = globalParams->getCIDToUnicodeFile(collectionA))) { + error(-1, "Couldn't find cidToUnicode file for the '%s' collection", + collectionA->getCString()); + return NULL; + } + + size = 32768; + mapA = (Unicode *)gmalloc(size * sizeof(Unicode)); + mapLenA = 0; + + while (getLine(buf, sizeof(buf), f)) { + if (mapLenA == size) { + size *= 2; + mapA = (Unicode *)grealloc(mapA, size * sizeof(Unicode)); + } + if (sscanf(buf, "%x", &u) == 1) { + mapA[mapLenA] = u; + } else { + error(-1, "Bad line (%d) in cidToUnicode file for the '%s' collection", + (int)(mapLenA + 1), collectionA->getCString()); + mapA[mapLenA] = 0; + } + ++mapLenA; + } + fclose(f); + + ctu = new CharCodeToUnicode(collectionA->copy(), mapA, mapLenA, gTrue, + NULL, 0); + gfree(mapA); + return ctu; +} + +CharCodeToUnicode *CharCodeToUnicode::make8BitToUnicode(Unicode *toUnicode) { + return new CharCodeToUnicode(NULL, toUnicode, 256, gTrue, NULL, 0); +} + +CharCodeToUnicode *CharCodeToUnicode::parseCMap(GString *buf, int nBits) { + CharCodeToUnicode *ctu; + char *p; + + ctu = new CharCodeToUnicode(NULL); + p = buf->getCString(); + ctu->parseCMap1(&getCharFromString, &p, nBits); + return ctu; +} + +void CharCodeToUnicode::parseCMap1(int (*getCharFunc)(void *), void *data, + int nBits) { + PSTokenizer *pst; + char tok1[256], tok2[256], tok3[256]; + int nDigits, n1, n2, n3; + CharCode oldLen, i; + CharCode code1, code2; + Unicode u; + char uHex[5]; + int j; + GString *name; + FILE *f; + + nDigits = nBits / 4; + pst = new PSTokenizer(getCharFunc, data); + pst->getToken(tok1, sizeof(tok1), &n1); + while (pst->getToken(tok2, sizeof(tok2), &n2)) { + if (!strcmp(tok2, "usecmap")) { + if (tok1[0] == '/') { + name = new GString(tok1 + 1); + if ((f = globalParams->findToUnicodeFile(name))) { + parseCMap1(&getCharFromFile, f, nBits); + fclose(f); + } else { + error(-1, "Couldn't find ToUnicode CMap file for '%s'", + name->getCString()); + } + delete name; + } + pst->getToken(tok1, sizeof(tok1), &n1); + } else if (!strcmp(tok2, "beginbfchar")) { + while (pst->getToken(tok1, sizeof(tok1), &n1)) { + if (!strcmp(tok1, "endbfchar")) { + break; + } + if (!pst->getToken(tok2, sizeof(tok2), &n2) || + !strcmp(tok2, "endbfchar")) { + error(-1, "Illegal entry in bfchar block in ToUnicode CMap"); + break; + } + if (!(n1 == 2 + nDigits && tok1[0] == '<' && tok1[n1 - 1] == '>' && + tok2[0] == '<' && tok2[n2 - 1] == '>')) { + error(-1, "Illegal entry in bfchar block in ToUnicode CMap"); + continue; + } + tok1[n1 - 1] = tok2[n2 - 1] = '\0'; + if (sscanf(tok1 + 1, "%x", &code1) != 1) { + error(-1, "Illegal entry in bfchar block in ToUnicode CMap"); + continue; + } + if (code1 >= mapLen) { + oldLen = mapLen; + mapLen = (code1 + 256) & ~255; + map = (Unicode *)grealloc(map, mapLen * sizeof(Unicode)); + for (i = oldLen; i < mapLen; ++i) { + map[i] = 0; + } + } + if (n2 == 6) { + if (sscanf(tok2 + 1, "%x", &u) != 1) { + error(-1, "Illegal entry in bfchar block in ToUnicode CMap"); + continue; + } + map[code1] = u; + } else { + map[code1] = 0; + if (sMapLen == sMapSize) { + sMapSize += 8; + sMap = (CharCodeToUnicodeString *) + grealloc(sMap, sMapSize * sizeof(CharCodeToUnicodeString)); + } + sMap[sMapLen].c = code1; + sMap[sMapLen].len = (n2 - 2) / 4; + for (j = 0; j < sMap[sMapLen].len && j < maxUnicodeString; ++j) { + strncpy(uHex, tok2 + 1 + j*4, 4); + uHex[4] = '\0'; + if (sscanf(uHex, "%x", &sMap[sMapLen].u[j]) != 1) { + error(-1, "Illegal entry in bfchar block in ToUnicode CMap"); + } + } + ++sMapLen; + } + } + pst->getToken(tok1, sizeof(tok1), &n1); + } else if (!strcmp(tok2, "beginbfrange")) { + while (pst->getToken(tok1, sizeof(tok1), &n1)) { + if (!strcmp(tok1, "endbfrange")) { + break; + } + if (!pst->getToken(tok2, sizeof(tok2), &n2) || + !strcmp(tok2, "endbfrange") || + !pst->getToken(tok3, sizeof(tok3), &n3) || + !strcmp(tok3, "endbfrange")) { + error(-1, "Illegal entry in bfrange block in ToUnicode CMap"); + break; + } + if (!(n1 == 2 + nDigits && tok1[0] == '<' && tok1[n1 - 1] == '>' && + n2 == 2 + nDigits && tok2[0] == '<' && tok2[n2 - 1] == '>' && + tok3[0] == '<' && tok3[n3 - 1] == '>')) { + error(-1, "Illegal entry in bfrange block in ToUnicode CMap"); + continue; + } + tok1[n1 - 1] = tok2[n2 - 1] = tok3[n3 - 1] = '\0'; + if (sscanf(tok1 + 1, "%x", &code1) != 1 || + sscanf(tok2 + 1, "%x", &code2) != 1) { + error(-1, "Illegal entry in bfrange block in ToUnicode CMap"); + continue; + } + if (code2 >= mapLen) { + oldLen = mapLen; + mapLen = (code2 + 256) & ~255; + map = (Unicode *)grealloc(map, mapLen * sizeof(Unicode)); + for (i = oldLen; i < mapLen; ++i) { + map[i] = 0; + } + } + if (n3 == 6) { + if (sscanf(tok3 + 1, "%x", &u) != 1) { + error(-1, "Illegal entry in bfrange block in ToUnicode CMap"); + continue; + } + for (; code1 <= code2; ++code1) { + map[code1] = u++; + } + } else { + if (sMapLen + (int)(code2 - code1 + 1) > sMapSize) { + sMapSize = (sMapSize + (code2 - code1 + 1) + 7) & ~7; + sMap = (CharCodeToUnicodeString *) + grealloc(sMap, sMapSize * sizeof(CharCodeToUnicodeString)); + } + for (i = 0; code1 <= code2; ++code1, ++i) { + map[code1] = 0; + sMap[sMapLen].c = code1; + sMap[sMapLen].len = (n3 - 2) / 4; + for (j = 0; j < sMap[sMapLen].len && j < maxUnicodeString; ++j) { + strncpy(uHex, tok3 + 1 + j*4, 4); + uHex[4] = '\0'; + if (sscanf(uHex, "%x", &sMap[sMapLen].u[j]) != 1) { + error(-1, "Illegal entry in bfrange block in ToUnicode CMap"); + } + } + sMap[sMapLen].u[sMap[sMapLen].len - 1] += i; + ++sMapLen; + } + } + } + pst->getToken(tok1, sizeof(tok1), &n1); + } else { + strcpy(tok1, tok2); + } + } + delete pst; +} + +CharCodeToUnicode::CharCodeToUnicode(GString *collectionA) { + CharCode i; + + collection = collectionA; + mapLen = 256; + map = (Unicode *)gmalloc(mapLen * sizeof(Unicode)); + for (i = 0; i < mapLen; ++i) { + map[i] = 0; + } + sMap = NULL; + sMapLen = sMapSize = 0; + refCnt = 1; +} + +CharCodeToUnicode::CharCodeToUnicode(GString *collectionA, Unicode *mapA, + CharCode mapLenA, GBool copyMap, + CharCodeToUnicodeString *sMapA, + int sMapLenA) { + collection = collectionA; + mapLen = mapLenA; + if (copyMap) { + map = (Unicode *)gmalloc(mapLen * sizeof(Unicode)); + memcpy(map, mapA, mapLen * sizeof(Unicode)); + } else { + map = mapA; + } + sMap = sMapA; + sMapLen = sMapSize = sMapLenA; + refCnt = 1; +} + +CharCodeToUnicode::~CharCodeToUnicode() { + if (collection) { + delete collection; + } + gfree(map); + if (sMap) { + gfree(sMap); + } +} + +void CharCodeToUnicode::incRefCnt() { + ++refCnt; +} + +void CharCodeToUnicode::decRefCnt() { + if (--refCnt == 0) { + delete this; + } +} + +GBool CharCodeToUnicode::match(GString *collectionA) { + return collection && !collection->cmp(collectionA); +} + +int CharCodeToUnicode::mapToUnicode(CharCode c, Unicode *u, int size) { + int i, j; + + if (c >= mapLen) { + return 0; + } + if (map[c]) { + u[0] = map[c]; + return 1; + } + for (i = 0; i < sMapLen; ++i) { + if (sMap[i].c == c) { + for (j = 0; j < sMap[i].len && j < size; ++j) { + u[j] = sMap[i].u[j]; + } + return j; + } + } + return 0; +} + +//------------------------------------------------------------------------ + +CIDToUnicodeCache::CIDToUnicodeCache() { + int i; + + for (i = 0; i < cidToUnicodeCacheSize; ++i) { + cache[i] = NULL; + } +} + +CIDToUnicodeCache::~CIDToUnicodeCache() { + int i; + + for (i = 0; i < cidToUnicodeCacheSize; ++i) { + if (cache[i]) { + cache[i]->decRefCnt(); + } + } +} + +CharCodeToUnicode *CIDToUnicodeCache::getCIDToUnicode(GString *collection) { + CharCodeToUnicode *ctu; + int i, j; + + if (cache[0] && cache[0]->match(collection)) { + cache[0]->incRefCnt(); + return cache[0]; + } + for (i = 1; i < cidToUnicodeCacheSize; ++i) { + if (cache[i] && cache[i]->match(collection)) { + ctu = cache[i]; + for (j = i; j >= 1; --j) { + cache[j] = cache[j - 1]; + } + cache[0] = ctu; + ctu->incRefCnt(); + return ctu; + } + } + if ((ctu = CharCodeToUnicode::parseCIDToUnicode(collection))) { + if (cache[cidToUnicodeCacheSize - 1]) { + cache[cidToUnicodeCacheSize - 1]->decRefCnt(); + } + for (j = cidToUnicodeCacheSize - 1; j >= 1; --j) { + cache[j] = cache[j - 1]; + } + cache[0] = ctu; + ctu->incRefCnt(); + return ctu; + } + return NULL; +} |