diff options
Diffstat (limited to 'poppler/Lexer.h')
| -rw-r--r-- | poppler/Lexer.h | 131 |
1 files changed, 68 insertions, 63 deletions
diff --git a/poppler/Lexer.h b/poppler/Lexer.h index 02b6cdc6..a117dbe0 100644 --- a/poppler/Lexer.h +++ b/poppler/Lexer.h @@ -13,10 +13,11 @@ // All changes made under the Poppler project to this file are licensed // under GPL version 2 or later // -// Copyright (C) 2006, 2007, 2010, 2013 Albert Astals Cid <aacid@kde.org> +// Copyright (C) 2006, 2007, 2010, 2013, 2017-2019 Albert Astals Cid <aacid@kde.org> // Copyright (C) 2006 Krzysztof Kowalczyk <kkowalczyk@gmail.com> // Copyright (C) 2013 Adrian Johnson <ajohnson@redneon.com> // Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de> +// Copyright (C) 2019 Adam Reichold <adam.reichold@t-online.de> // // To see a description of the changes please see the Changelog file that // came with your tarball or type make ChangeLog if you are building from git @@ -26,83 +27,87 @@ #ifndef LEXER_H #define LEXER_H -#ifdef USE_GCC_PRAGMAS -#pragma interface -#endif - #include "Object.h" #include "Stream.h" class XRef; -#define tokBufSize 128 // size of token buffer +#define tokBufSize 128 // size of token buffer //------------------------------------------------------------------------ // Lexer //------------------------------------------------------------------------ -class Lexer { +class POPPLER_PRIVATE_EXPORT Lexer +{ public: - - // Construct a lexer for a single stream. Deletes the stream when - // lexer is deleted. - Lexer(XRef *xrefA, Stream *str); - - // Construct a lexer for a stream or array of streams (assumes obj - // is either a stream or array of streams). - Lexer(XRef *xrefA, Object *obj); - - // Destructor. - ~Lexer(); - - // Get the next object from the input stream. - Object *getObj(Object *obj, int objNum = -1); - Object *getObj(Object *obj, const char *cmdA, int objNum); - - // Skip to the beginning of the next line in the input stream. - void skipToNextLine(); - - // Skip over one character. - void skipChar() { getChar(); } - - // Get stream. - Stream *getStream() - { return curStr.isStream() ? curStr.getStream() : (Stream *)NULL; } - - // Get current position in file. This is only used for error - // messages. - Goffset getPos() - { return curStr.isStream() ? curStr.streamGetPos() : -1; } - - // Set position in file. - void setPos(Goffset pos, int dir = 0) - { if (curStr.isStream()) curStr.streamSetPos(pos, dir); } - - // Returns true if <c> is a whitespace character. - static GBool isSpace(int c); - - - // often (e.g. ~30% on PDF Refernce 1.6 pdf file from Adobe site) getChar - // is called right after lookChar. In order to avoid expensive re-doing - // getChar() of underlying stream, we cache the last value found by - // lookChar() in lookCharLastValueCached. A special value - // LOOK_VALUE_NOT_CACHED that should never be part of stream indicates - // that no value was cached - static const int LOOK_VALUE_NOT_CACHED = -3; - int lookCharLastValueCached; + // Construct a lexer for a single stream. Deletes the stream when + // lexer is deleted. + Lexer(XRef *xrefA, Stream *str); + + // Construct a lexer for a stream or array of streams (assumes obj + // is either a stream or array of streams). + Lexer(XRef *xrefA, Object *obj); + + // Destructor. + ~Lexer(); + + Lexer(const Lexer &) = delete; + Lexer &operator=(const Lexer &) = delete; + + // Get the next object from the input stream. + Object getObj(int objNum = -1); + Object getObj(const char *cmdA, int objNum); + template<typename T> + Object getObj(T) = delete; + + // Skip to the beginning of the next line in the input stream. + void skipToNextLine(); + + // Skip over one character. + void skipChar() { getChar(); } + + // Get stream. + Stream *getStream() { return curStr.isStream() ? curStr.getStream() : nullptr; } + + // Get current position in file. This is only used for error + // messages. + Goffset getPos() const { return curStr.isStream() ? curStr.getStream()->getPos() : -1; } + + // Set position in file. + void setPos(Goffset pos) + { + if (curStr.isStream()) { + curStr.getStream()->setPos(pos); + } + } + + // Returns true if <c> is a whitespace character. + static bool isSpace(int c); + + // often (e.g. ~30% on PDF Refernce 1.6 pdf file from Adobe site) getChar + // is called right after lookChar. In order to avoid expensive re-doing + // getChar() of underlying stream, we cache the last value found by + // lookChar() in lookCharLastValueCached. A special value + // LOOK_VALUE_NOT_CACHED that should never be part of stream indicates + // that no value was cached + static const int LOOK_VALUE_NOT_CACHED = -3; + int lookCharLastValueCached; + + XRef *getXRef() const { return xref; } + bool hasXRef() const { return xref != nullptr; } private: + int getChar(bool comesFromLook = false); + int lookChar(); - int getChar(GBool comesFromLook = gFalse); - int lookChar(); - - Array *streams; // array of input streams - int strPtr; // index of current stream - Object curStr; // current stream - GBool freeArray; // should lexer free the streams array? - char tokBuf[tokBufSize]; // temporary token buffer + Array *streams; // array of input streams + int strPtr; // index of current stream + Object curStr; // current stream + bool freeArray; // should lexer free the streams array? + char tokBuf[tokBufSize]; // temporary token buffer - XRef *xref; + XRef *xref; }; #endif |