Diffstat (limited to 'noncore/unsupported/qpdf/xpdf/Lexer.h') (more/less context) (ignore whitespace changes)
-rw-r--r-- | noncore/unsupported/qpdf/xpdf/Lexer.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/noncore/unsupported/qpdf/xpdf/Lexer.h b/noncore/unsupported/qpdf/xpdf/Lexer.h new file mode 100644 index 0000000..5edbeda --- a/dev/null +++ b/noncore/unsupported/qpdf/xpdf/Lexer.h | |||
@@ -0,0 +1,74 @@ | |||
1 | //======================================================================== | ||
2 | // | ||
3 | // Lexer.h | ||
4 | // | ||
5 | // Copyright 1996 Derek B. Noonburg | ||
6 | // | ||
7 | //======================================================================== | ||
8 | |||
9 | #ifndef LEXER_H | ||
10 | #define LEXER_H | ||
11 | |||
12 | #ifdef __GNUC__ | ||
13 | #pragma interface | ||
14 | #endif | ||
15 | |||
16 | #include "Object.h" | ||
17 | #include "Stream.h" | ||
18 | |||
19 | class XRef; | ||
20 | |||
21 | #define tokBufSize 128 // size of token buffer | ||
22 | |||
23 | //------------------------------------------------------------------------ | ||
24 | // Lexer | ||
25 | //------------------------------------------------------------------------ | ||
26 | |||
27 | class Lexer { | ||
28 | public: | ||
29 | |||
30 | // Construct a lexer for a single stream. Deletes the stream when | ||
31 | // lexer is deleted. | ||
32 | Lexer(XRef *xref, Stream *str); | ||
33 | |||
34 | // Construct a lexer for a stream or array of streams (assumes obj | ||
35 | // is either a stream or array of streams). | ||
36 | Lexer(XRef *xref, Object *obj); | ||
37 | |||
38 | // Destructor. | ||
39 | ~Lexer(); | ||
40 | |||
41 | // Get the next object from the input stream. | ||
42 | Object *getObj(Object *obj); | ||
43 | |||
44 | // Skip to the beginning of the next line in the input stream. | ||
45 | void skipToNextLine(); | ||
46 | |||
47 | // Skip over one character. | ||
48 | void skipChar() { getChar(); } | ||
49 | |||
50 | // Get stream. | ||
51 | Stream *getStream() | ||
52 | { return curStr.isNone() ? (Stream *)NULL : curStr.getStream(); } | ||
53 | |||
54 | // Get current position in file. | ||
55 | int getPos() | ||
56 | { return curStr.isNone() ? -1 : curStr.streamGetPos(); } | ||
57 | |||
58 | // Set position in file. | ||
59 | void setPos(int pos) | ||
60 | { if (!curStr.isNone()) curStr.streamSetPos(pos); } | ||
61 | |||
62 | private: | ||
63 | |||
64 | int getChar(); | ||
65 | int lookChar(); | ||
66 | |||
67 | Array *streams; // array of input streams | ||
68 | int strPtr; // index of current stream | ||
69 | Object curStr; // current stream | ||
70 | GBool freeArray; // should lexer free the streams array? | ||
71 | char tokBuf[tokBufSize];// temporary token buffer | ||
72 | }; | ||
73 | |||
74 | #endif | ||