LLLexer.h revision 8e3a8e0452695643d04c21e15c94b802aef81bae 
1//===- LLLexer.h - Lexer for LLVM Assembly Files ----------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by Chris Lattner and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This class represents the Lexer for .ll files.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LIB_ASMPARSER_LLLEXER_H
15#define LIB_ASMPARSER_LLLEXER_H
16
17#include <vector>
18#include <string>
19#include <iosfwd>
20
21namespace llvm {
22  class MemoryBuffer;
23
24  class LLLexer {
25    const char *CurPtr;
26    unsigned CurLineNo;
27    MemoryBuffer *CurBuf;
28
29    const char *TokStart;
30
31    std::string TheError;
32  public:
33    LLLexer(MemoryBuffer *StartBuf);
34    ~LLLexer() {}
35
36    const char *getTokStart() const { return TokStart; }
37    unsigned getTokLength() const { return CurPtr-TokStart; }
38    unsigned getLineNo() const { return CurLineNo; }
39    std::string getFilename() const;
40    int LexToken();
41
42    const std::string getError() const { return TheError; }
43
44  private:
45    int getNextChar();
46    void SkipLineComment();
47    int LexIdentifier();
48    int LexDigitOrNegative();
49    int LexPositive();
50    int LexAt();
51    int LexPercent();
52    int LexQuote();
53    int Lex0x();
54  };
55} // end namespace llvm
56
57#endif
58