forked from OSchip/llvm-project
93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
//===- LLLexer.h - Lexer for LLVM Assembly Files ----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class represents the Lexer for .ll files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LIB_ASMPARSER_LLLEXER_H
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#define LIB_ASMPARSER_LLLEXER_H
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#include "LLToken.h"
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#include "llvm/ADT/APSInt.h"
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#include "llvm/ADT/APFloat.h"
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#include "llvm/Support/SourceMgr.h"
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#include <string>
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namespace llvm {
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class MemoryBuffer;
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class Type;
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class SMDiagnostic;
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class LLVMContext;
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class LLLexer {
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const char *CurPtr;
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MemoryBuffer *CurBuf;
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SMDiagnostic &ErrorInfo;
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SourceMgr &SM;
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LLVMContext &Context;
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// Information about the current token.
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const char *TokStart;
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lltok::Kind CurKind;
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std::string StrVal;
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unsigned UIntVal;
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Type *TyVal;
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APFloat APFloatVal;
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APSInt APSIntVal;
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public:
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explicit LLLexer(MemoryBuffer *StartBuf, SourceMgr &SM, SMDiagnostic &,
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LLVMContext &C);
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~LLLexer() {}
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lltok::Kind Lex() {
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return CurKind = LexToken();
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}
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typedef SMLoc LocTy;
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LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); }
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lltok::Kind getKind() const { return CurKind; }
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const std::string &getStrVal() const { return StrVal; }
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Type *getTyVal() const { return TyVal; }
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unsigned getUIntVal() const { return UIntVal; }
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const APSInt &getAPSIntVal() const { return APSIntVal; }
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const APFloat &getAPFloatVal() const { return APFloatVal; }
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bool Error(LocTy L, const Twine &Msg) const;
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bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); }
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std::string getFilename() const;
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private:
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lltok::Kind LexToken();
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int getNextChar();
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void SkipLineComment();
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lltok::Kind ReadString(lltok::Kind kind);
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bool ReadVarName();
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lltok::Kind LexIdentifier();
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lltok::Kind LexDigitOrNegative();
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lltok::Kind LexPositive();
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lltok::Kind LexAt();
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lltok::Kind LexExclaim();
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lltok::Kind LexPercent();
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lltok::Kind LexQuote();
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lltok::Kind Lex0x();
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uint64_t atoull(const char *Buffer, const char *End);
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uint64_t HexIntToVal(const char *Buffer, const char *End);
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void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
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void FP80HexToIntPair(const char *Buff, const char *End, uint64_t Pair[2]);
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};
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} // end namespace llvm
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#endif
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