1 //========================================================================
5 // Copyright 1996-2003 Glyph & Cog, LLC
7 //========================================================================
14 #ifdef USE_GCC_PRAGMAS
23 #define tokBufSize 128 // size of token buffer
25 //------------------------------------------------------------------------
27 //------------------------------------------------------------------------
32 // Construct a lexer for a single stream. Deletes the stream when
34 Lexer(XRef *xref, Stream *str);
36 // Construct a lexer for a stream or array of streams (assumes obj
37 // is either a stream or array of streams).
38 Lexer(XRef *xref, Object *obj);
43 // Get the next object from the input stream.
44 Object *getObj(Object *obj);
46 // Skip to the beginning of the next line in the input stream.
47 void skipToNextLine();
49 // Skip over one character.
50 void skipChar() { getChar(); }
54 { return curStr.isNone() ? (Stream *)NULL : curStr.getStream(); }
56 // Get current position in file. This is only used for error
57 // messages, so it returns an int instead of a Guint.
59 { return curStr.isNone() ? -1 : (int)curStr.streamGetPos(); }
61 // Set position in file.
62 void setPos(Guint pos, int dir = 0)
63 { if (!curStr.isNone()) curStr.streamSetPos(pos, dir); }
65 // Returns true if <c> is a whitespace character.
66 static GBool isSpace(int c);
73 Array *streams; // array of input streams
74 int strPtr; // index of current stream
75 Object curStr; // current stream
76 GBool freeArray; // should lexer free the streams array?
77 char tokBuf[tokBufSize]; // temporary token buffer