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