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/APSInt.h" 19 #include "llvm/ADT/APFloat.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 std::string TheError; 46 public: 47 explicit LLLexer(MemoryBuffer *StartBuf, SourceMgr &SM, SMDiagnostic &, 48 LLVMContext &C); ~LLLexer()49 ~LLLexer() {} 50 Lex()51 lltok::Kind Lex() { 52 return CurKind = LexToken(); 53 } 54 55 typedef SMLoc LocTy; getLoc()56 LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); } getKind()57 lltok::Kind getKind() const { return CurKind; } getStrVal()58 const std::string &getStrVal() const { return StrVal; } getTyVal()59 Type *getTyVal() const { return TyVal; } getUIntVal()60 unsigned getUIntVal() const { return UIntVal; } getAPSIntVal()61 const APSInt &getAPSIntVal() const { return APSIntVal; } getAPFloatVal()62 const APFloat &getAPFloatVal() const { return APFloatVal; } 63 64 65 bool Error(LocTy L, const Twine &Msg) const; Error(const Twine & Msg)66 bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); } 67 std::string getFilename() const; 68 69 private: 70 lltok::Kind LexToken(); 71 72 int getNextChar(); 73 void SkipLineComment(); 74 lltok::Kind ReadString(lltok::Kind kind); 75 bool ReadVarName(); 76 77 lltok::Kind LexIdentifier(); 78 lltok::Kind LexDigitOrNegative(); 79 lltok::Kind LexPositive(); 80 lltok::Kind LexAt(); 81 lltok::Kind LexExclaim(); 82 lltok::Kind LexPercent(); 83 lltok::Kind LexQuote(); 84 lltok::Kind Lex0x(); 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 94