Diffstat (limited to 'noncore/unsupported/qpdf/xpdf/Stream.cc') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | noncore/unsupported/qpdf/xpdf/Stream.cc | 215 |
1 files changed, 187 insertions, 28 deletions
diff --git a/noncore/unsupported/qpdf/xpdf/Stream.cc b/noncore/unsupported/qpdf/xpdf/Stream.cc index 18490d4..c558478 100644 --- a/noncore/unsupported/qpdf/xpdf/Stream.cc +++ b/noncore/unsupported/qpdf/xpdf/Stream.cc @@ -1,11 +1,11 @@ //======================================================================== // // Stream.cc // -// Copyright 1996 Derek B. Noonburg +// Copyright 1996-2002 Glyph & Cog, LLC // //======================================================================== #ifdef __GNUC__ #pragma implementation #endif @@ -300,13 +300,13 @@ FilterStream::~FilterStream() { } void FilterStream::close() { str->close(); } -void FilterStream::setPos(int pos) { +void FilterStream::setPos(Guint pos, int dir) { error(-1, "Internal: called setPos() on FilterStream"); } //------------------------------------------------------------------------ // ImageStream //------------------------------------------------------------------------ @@ -551,60 +551,74 @@ GBool StreamPredictor::getNextLine() { } //------------------------------------------------------------------------ // FileStream //------------------------------------------------------------------------ -FileStream::FileStream(FILE *fA, int startA, int lengthA, Object *dictA): +FileStream::FileStream(FILE *fA, Guint startA, GBool limitedA, + Guint lengthA, Object *dictA): BaseStream(dictA) { f = fA; start = startA; + limited = limitedA; length = lengthA; bufPtr = bufEnd = buf; bufPos = start; - savePos = -1; + savePos = 0; + saved = gFalse; } FileStream::~FileStream() { close(); } -Stream *FileStream::makeSubStream(int startA, int lengthA, Object *dictA) { - return new FileStream(f, startA, lengthA, dictA); +Stream *FileStream::makeSubStream(Guint startA, GBool limitedA, + Guint lengthA, Object *dictA) { + return new FileStream(f, startA, limitedA, lengthA, dictA); } void FileStream::reset() { - savePos = (int)ftell(f); +#if HAVE_FSEEK64 + savePos = (Guint)ftell64(f); + fseek64(f, start, SEEK_SET); +#else + savePos = (Guint)ftell(f); fseek(f, start, SEEK_SET); +#endif + saved = gTrue; bufPtr = bufEnd = buf; bufPos = start; #ifndef NO_DECRYPTION if (decrypt) decrypt->reset(); #endif } void FileStream::close() { - if (savePos >= 0) { + if (saved) { +#if HAVE_FSEEK64 + fseek64(f, savePos, SEEK_SET); +#else fseek(f, savePos, SEEK_SET); - savePos = -1; +#endif + saved = gFalse; } } GBool FileStream::fillBuf() { int n; #ifndef NO_DECRYPTION char *p; #endif bufPos += bufEnd - buf; bufPtr = bufEnd = buf; - if (length >= 0 && bufPos >= start + length) { + if (limited && bufPos >= start + length) { return gFalse; } - if (length >= 0 && bufPos + fileStreamBufSize > start + length) { + if (limited && bufPos + fileStreamBufSize > start + length) { n = start + length - bufPos; } else { n = fileStreamBufSize; } n = fread(buf, 1, n, f); bufEnd = buf + n; @@ -618,66 +632,165 @@ GBool FileStream::fillBuf() { } } #endif return gTrue; } -void FileStream::setPos(int pos) { - long size; +void FileStream::setPos(Guint pos, int dir) { + Guint size; - if (pos >= 0) { + if (dir >= 0) { +#if HAVE_FSEEK64 + fseek64(f, pos, SEEK_SET); +#else fseek(f, pos, SEEK_SET); +#endif bufPos = pos; } else { +#if HAVE_FSEEK64 + fseek64(f, 0, SEEK_END); + size = (Guint)ftell64(f); +#else fseek(f, 0, SEEK_END); - size = ftell(f); - if (pos < -size) - pos = (int)(-size); + size = (Guint)ftell(f); +#endif + if (pos > size) + pos = (Guint)size; #ifdef __CYGWIN32__ //~ work around a bug in cygwin's implementation of fseek rewind(f); #endif - fseek(f, pos, SEEK_END); - bufPos = (int)ftell(f); +#if HAVE_FSEEK64 + fseek64(f, -(int)pos, SEEK_END); + bufPos = (Guint)ftell64(f); +#else + fseek(f, -(int)pos, SEEK_END); + bufPos = (Guint)ftell(f); +#endif } bufPtr = bufEnd = buf; } void FileStream::moveStart(int delta) { start += delta; bufPtr = bufEnd = buf; bufPos = start; } //------------------------------------------------------------------------ +// MemStream +//------------------------------------------------------------------------ + +MemStream::MemStream(char *bufA, Guint lengthA, Object *dictA): + BaseStream(dictA) { + buf = bufA; + needFree = gFalse; + length = lengthA; + bufEnd = buf + length; + bufPtr = buf; +} + +MemStream::~MemStream() { + if (needFree) { + gfree(buf); + } +} + +Stream *MemStream::makeSubStream(Guint start, GBool limited, + Guint lengthA, Object *dictA) { + Guint newLength; + + if (!limited || start + lengthA > length) { + newLength = length - start; + } else { + newLength = lengthA; + } + return new MemStream(buf + start, newLength, dictA); +} + +void MemStream::reset() { + bufPtr = buf; +#ifndef NO_DECRYPTION + if (decrypt) { + decrypt->reset(); + } +#endif +} + +void MemStream::close() { +} + +void MemStream::setPos(Guint pos, int dir) { + if (dir >= 0) { + if (pos > length) { + bufPtr = bufEnd; + } else { + bufPtr = buf + pos; + } + } else { + if (pos > length) { + bufPtr = buf; + } else { + bufPtr = bufEnd - pos; + } + } +} + +void MemStream::moveStart(int delta) { + buf += delta; + bufPtr = buf; +} + +#ifndef NO_DECRYPTION +void MemStream::doDecryption(Guchar *fileKey, int keyLength, + int objNum, int objGen) { + char *newBuf; + char *p, *q; + + this->BaseStream::doDecryption(fileKey, keyLength, objNum, objGen); + if (decrypt) { + newBuf = (char *)gmalloc(bufEnd - buf); + for (p = buf, q = newBuf; p < bufEnd; ++p, ++q) { + *q = (char)decrypt->decryptByte((Guchar)*p); + } + bufEnd = newBuf + (bufEnd - buf); + bufPtr = newBuf + (bufPtr - buf); + buf = newBuf; + needFree = gTrue; + } +} +#endif + +//------------------------------------------------------------------------ // EmbedStream //------------------------------------------------------------------------ EmbedStream::EmbedStream(Stream *strA, Object *dictA): BaseStream(dictA) { str = strA; } EmbedStream::~EmbedStream() { } -Stream *EmbedStream::makeSubStream(int start, int length, Object *dictA) { +Stream *EmbedStream::makeSubStream(Guint start, GBool limited, + Guint length, Object *dictA) { error(-1, "Internal: called makeSubStream() on EmbedStream"); return NULL; } -void EmbedStream::setPos(int pos) { +void EmbedStream::setPos(Guint pos, int dir) { error(-1, "Internal: called setPos() on EmbedStream"); } -int EmbedStream::getStart() { +Guint EmbedStream::getStart() { error(-1, "Internal: called getStart() on EmbedStream"); return 0; } -void EmbedStream::moveStart(int start) { +void EmbedStream::moveStart(int delta) { error(-1, "Internal: called moveStart() on EmbedStream"); } //------------------------------------------------------------------------ // ASCIIHexStream //------------------------------------------------------------------------ @@ -956,17 +1069,13 @@ void LZWStream::reset() { error(getPos(), "Couldn't popen '%s'", zCmd->getCString()); unlink(zName->getCString()); delete zName; return; } #else // HAVE_POPEN -#ifdef VMS - if (!system(zCmd->getCString())) { -#else - if (system(zCmd->getCString())) { -#endif + if (!executeCommand(zCmd->getCString())) { error(getPos(), "Couldn't execute '%s'", zCmd->getCString()); unlink(zName->getCString()); delete zName; return; } zName->del(zName->getLength() - 2, 2); @@ -3284,12 +3393,62 @@ int FixedLengthEncoder::lookChar() { if (length >= 0 && count >= length) return EOF; return str->getChar(); } //------------------------------------------------------------------------ +// ASCIIHexEncoder +//------------------------------------------------------------------------ + +ASCIIHexEncoder::ASCIIHexEncoder(Stream *strA): + FilterStream(strA) { + bufPtr = bufEnd = buf; + lineLen = 0; + eof = gFalse; +} + +ASCIIHexEncoder::~ASCIIHexEncoder() { + if (str->isEncoder()) { + delete str; + } +} + +void ASCIIHexEncoder::reset() { + str->reset(); + bufPtr = bufEnd = buf; + lineLen = 0; + eof = gFalse; +} + +void ASCIIHexEncoder::close() { +} + +GBool ASCIIHexEncoder::fillBuf() { + static char *hex = "0123456789abcdef"; + int c; + + if (eof) { + return gFalse; + } + bufPtr = bufEnd = buf; + if ((c = str->getChar()) == EOF) { + *bufEnd++ = '>'; + eof = gTrue; + } else { + if (lineLen >= 64) { + *bufEnd++ = '\n'; + lineLen = 0; + } + *bufEnd++ = hex[(c >> 4) & 0x0f]; + *bufEnd++ = hex[c & 0x0f]; + lineLen += 2; + } + return gTrue; +} + +//------------------------------------------------------------------------ // ASCII85Encoder //------------------------------------------------------------------------ ASCII85Encoder::ASCII85Encoder(Stream *strA): FilterStream(strA) { bufPtr = bufEnd = buf; |