diff options
Diffstat (limited to 'kpdf/xpdf/xpdf/Parser.cc')
| -rw-r--r-- | kpdf/xpdf/xpdf/Parser.cc | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/kpdf/xpdf/xpdf/Parser.cc b/kpdf/xpdf/xpdf/Parser.cc deleted file mode 100644 index 65a43d94..00000000 --- a/kpdf/xpdf/xpdf/Parser.cc +++ /dev/null @@ -1,227 +0,0 @@ -//======================================================================== -// -// Parser.cc -// -// Copyright 1996-2003 Glyph & Cog, LLC -// -//======================================================================== - -#include <aconf.h> - -#ifdef USE_GCC_PRAGMAS -#pragma implementation -#endif - -#include <stddef.h> -#include "Object.h" -#include "Array.h" -#include "Dict.h" -#include "Decrypt.h" -#include "Parser.h" -#include "XRef.h" -#include "Error.h" - -Parser::Parser(XRef *xrefA, Lexer *lexerA, GBool allowStreamsA) { - xref = xrefA; - lexer = lexerA; - inlineImg = 0; - allowStreams = allowStreamsA; - lexer->getObj(&buf1); - lexer->getObj(&buf2); -} - -Parser::~Parser() { - buf1.free(); - buf2.free(); - delete lexer; -} - -Object *Parser::getObj(Object *obj, Guchar *fileKey, - CryptAlgorithm encAlgorithm, int keyLength, - int objNum, int objGen) { - char *key; - Stream *str; - Object obj2; - int num; - DecryptStream *decrypt; - GString *s, *s2; - int c; - - // refill buffer after inline image data - if (inlineImg == 2) { - buf1.free(); - buf2.free(); - lexer->getObj(&buf1); - lexer->getObj(&buf2); - inlineImg = 0; - } - - // array - if (buf1.isCmd("[")) { - shift(); - obj->initArray(xref); - while (!buf1.isCmd("]") && !buf1.isEOF()) - obj->arrayAdd(getObj(&obj2, fileKey, encAlgorithm, keyLength, - objNum, objGen)); - if (buf1.isEOF()) - error(getPos(), "End of file inside array"); - shift(); - - // dictionary or stream - } else if (buf1.isCmd("<<")) { - shift(objNum); - obj->initDict(xref); - while (!buf1.isCmd(">>") && !buf1.isEOF()) { - if (!buf1.isName()) { - error(getPos(), "Dictionary key must be a name object"); - shift(); - } else { - key = copyString(buf1.getName()); - shift(); - if (buf1.isEOF() || buf1.isError()) { - gfree(key); - break; - } - obj->dictAdd(key, getObj(&obj2, fileKey, encAlgorithm, keyLength, - objNum, objGen)); - } - } - if (buf1.isEOF()) - error(getPos(), "End of file inside dictionary"); - // stream objects are not allowed inside content streams or - // object streams - if (allowStreams && buf2.isCmd("stream")) { - if ((str = makeStream(obj, fileKey, encAlgorithm, keyLength, - objNum, objGen))) { - obj->initStream(str); - } else { - obj->free(); - obj->initError(); - } - } else { - shift(); - } - - // indirect reference or integer - } else if (buf1.isInt()) { - num = buf1.getInt(); - shift(); - if (buf1.isInt() && buf2.isCmd("R")) { - obj->initRef(num, buf1.getInt()); - shift(); - shift(); - } else { - obj->initInt(num); - } - - // string - } else if (buf1.isString() && fileKey) { - s = buf1.getString(); - s2 = new GString(); - obj2.initNull(); - decrypt = new DecryptStream(new MemStream(s->getCString(), 0, - s->getLength(), &obj2), - fileKey, encAlgorithm, keyLength, - objNum, objGen); - decrypt->reset(); - while ((c = decrypt->getChar()) != EOF) { - s2->append((char)c); - } - delete decrypt; - obj->initString(s2); - shift(); - - // simple object - } else { - buf1.copy(obj); - shift(); - } - - return obj; -} - -Stream *Parser::makeStream(Object *dict, Guchar *fileKey, - CryptAlgorithm encAlgorithm, int keyLength, - int objNum, int objGen) { - Object obj; - BaseStream *baseStr; - Stream *str; - Guint pos, endPos, length; - - // get stream start position - lexer->skipToNextLine(); - pos = lexer->getPos(); - - // get length - dict->dictLookup("Length", &obj); - if (obj.isInt()) { - length = (Guint)obj.getInt(); - obj.free(); - } else { - error(getPos(), "Bad 'Length' attribute in stream"); - obj.free(); - return NULL; - } - - // check for length in damaged file - if (xref && xref->getStreamEnd(pos, &endPos)) { - length = endPos - pos; - } - - // in badly damaged PDF files, we can run off the end of the input - // stream immediately after the "stream" token - if (!lexer->getStream()) { - return NULL; - } - baseStr = lexer->getStream()->getBaseStream(); - - // skip over stream data - lexer->setPos(pos + length); - - // refill token buffers and check for 'endstream' - shift(); // kill '>>' - shift(); // kill 'stream' - if (buf1.isCmd("endstream")) { - shift(); - } else { - error(getPos(), "Missing 'endstream'"); - // kludge for broken PDF files: just add 5k to the length, and - // hope its enough - length += 5000; - } - - // make base stream - str = baseStr->makeSubStream(pos, gTrue, length, dict); - - // handle decryption - if (fileKey) { - str = new DecryptStream(str, fileKey, encAlgorithm, keyLength, - objNum, objGen); - } - - // get filters - str = str->addFilters(dict); - - return str; -} - -void Parser::shift(int objNum) { - if (inlineImg > 0) { - if (inlineImg < 2) { - ++inlineImg; - } else { - // in a damaged content stream, if 'ID' shows up in the middle - // of a dictionary, we need to reset - inlineImg = 0; - } - } else if (buf2.isCmd("ID")) { - lexer->skipChar(); // skip char after 'ID' command - inlineImg = 1; - } - buf1.free(); - buf1 = buf2; - if (inlineImg > 0) // don't buffer inline image data - buf2.initNull(); - else - lexer->getObj(&buf2, objNum); -} |