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); ~LLLexer()48 ~LLLexer() {} 49 Lex()50 lltok::Kind Lex() { 51 return CurKind = LexToken(); 52 } 53 54 typedef SMLoc LocTy; getLoc()55 LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); } getKind()56 lltok::Kind getKind() const { return CurKind; } getStrVal()57 const std::string &getStrVal() const { return StrVal; } getTyVal()58 Type *getTyVal() const { return TyVal; } getUIntVal()59 unsigned getUIntVal() const { return UIntVal; } getAPSIntVal()60 const APSInt &getAPSIntVal() const { return APSIntVal; } getAPFloatVal()61 const APFloat &getAPFloatVal() const { return APFloatVal; } 62 63 64 bool Error(LocTy L, const Twine &Msg) const; Error(const Twine & Msg)65 bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); } 66 67 void Warning(LocTy WarningLoc, const Twine &Msg) const; Warning(const Twine & Msg)68 void Warning(const Twine &Msg) const { return Warning(getLoc(), Msg); } 69 70 std::string getFilename() const; 71 72 private: 73 lltok::Kind LexToken(); 74 75 int getNextChar(); 76 void SkipLineComment(); 77 lltok::Kind ReadString(lltok::Kind kind); 78 bool ReadVarName(); 79 80 lltok::Kind LexIdentifier(); 81 lltok::Kind LexDigitOrNegative(); 82 lltok::Kind LexPositive(); 83 lltok::Kind LexAt(); 84 lltok::Kind LexDollar(); 85 lltok::Kind LexExclaim(); 86 lltok::Kind LexPercent(); 87 lltok::Kind LexQuote(); 88 lltok::Kind Lex0x(); 89 lltok::Kind LexHash(); 90 91 uint64_t atoull(const char *Buffer, const char *End); 92 uint64_t HexIntToVal(const char *Buffer, const char *End); 93 void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]); 94 void FP80HexToIntPair(const char *Buff, const char *End, uint64_t Pair[2]); 95 }; 96 } // end namespace llvm 97 98 #endif 99