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comparison lib/AsmParser/LLLexer.h @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children 54457678186b
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-1:000000000000 0:95c75e76d11b
1 //===- LLLexer.h - Lexer for LLVM Assembly Files ----------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // 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 "LLToken.h"
18 #include "llvm/ADT/APFloat.h"
19 #include "llvm/ADT/APSInt.h"
20 #include "llvm/Support/SourceMgr.h"
21 #include <string>
22
23 namespace llvm {
24 class MemoryBuffer;
25 class Type;
26 class SMDiagnostic;
27 class LLVMContext;
28
29 class LLLexer {
30 const char *CurPtr;
31 MemoryBuffer *CurBuf;
32 SMDiagnostic &ErrorInfo;
33 SourceMgr &SM;
34 LLVMContext &Context;
35
36 // Information about the current token.
37 const char *TokStart;
38 lltok::Kind CurKind;
39 std::string StrVal;
40 unsigned UIntVal;
41 Type *TyVal;
42 APFloat APFloatVal;
43 APSInt APSIntVal;
44
45 public:
46 explicit LLLexer(MemoryBuffer *StartBuf, SourceMgr &SM, SMDiagnostic &,
47 LLVMContext &C);
48 ~LLLexer() {}
49
50 lltok::Kind Lex() {
51 return CurKind = LexToken();
52 }
53
54 typedef SMLoc LocTy;
55 LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); }
56 lltok::Kind getKind() const { return CurKind; }
57 const std::string &getStrVal() const { return StrVal; }
58 Type *getTyVal() const { return TyVal; }
59 unsigned getUIntVal() const { return UIntVal; }
60 const APSInt &getAPSIntVal() const { return APSIntVal; }
61 const APFloat &getAPFloatVal() const { return APFloatVal; }
62
63
64 bool Error(LocTy L, const Twine &Msg) const;
65 bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); }
66 std::string getFilename() const;
67
68 private:
69 lltok::Kind LexToken();
70
71 int getNextChar();
72 void SkipLineComment();
73 lltok::Kind ReadString(lltok::Kind kind);
74 bool ReadVarName();
75
76 lltok::Kind LexIdentifier();
77 lltok::Kind LexDigitOrNegative();
78 lltok::Kind LexPositive();
79 lltok::Kind LexAt();
80 lltok::Kind LexExclaim();
81 lltok::Kind LexPercent();
82 lltok::Kind LexQuote();
83 lltok::Kind Lex0x();
84 lltok::Kind LexHash();
85
86 uint64_t atoull(const char *Buffer, const char *End);
87 uint64_t HexIntToVal(const char *Buffer, const char *End);
88 void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
89 void FP80HexToIntPair(const char *Buff, const char *End, uint64_t Pair[2]);
90 };
91 } // end namespace llvm
92
93 #endif