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dbd692a66e
- This provides the AsmLexer interface to the target specific assembly parsers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76460 91177308-0d34-0410-b5e6-96231b3b80d8
123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
//===- AsmLexer.h - Lexer for 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 declares the lexer for assembly files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ASMLEXER_H
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#define ASMLEXER_H
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#include "llvm/MC/MCAsmLexer.h"
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#include "llvm/Support/DataTypes.h"
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#include <string>
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#include <cassert>
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namespace llvm {
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class MemoryBuffer;
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class SourceMgr;
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class SMLoc;
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namespace asmtok {
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enum TokKind {
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// Markers
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Eof, Error,
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// String values.
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Identifier,
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Register,
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String,
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// Integer values.
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IntVal,
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// No-value.
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EndOfStatement,
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Colon,
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Plus, Minus, Tilde,
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Slash, // '/'
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LParen, RParen,
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Star, Comma, Dollar, Equal, EqualEqual,
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Pipe, PipePipe, Caret,
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Amp, AmpAmp, Exclaim, ExclaimEqual, Percent,
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Less, LessEqual, LessLess, LessGreater,
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Greater, GreaterEqual, GreaterGreater
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};
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}
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/// AsmLexer - Lexer class for assembly files.
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class AsmLexer : public MCAsmLexer {
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SourceMgr &SrcMgr;
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const char *CurPtr;
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const MemoryBuffer *CurBuf;
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// A llvm::StringSet<>, which provides uniqued and null-terminated strings.
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void *TheStringSet;
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// Information about the current token.
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const char *TokStart;
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asmtok::TokKind CurKind;
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const char *CurStrVal; // This is valid for Identifier.
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int64_t CurIntVal;
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/// CurBuffer - This is the current buffer index we're lexing from as managed
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/// by the SourceMgr object.
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int CurBuffer;
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void operator=(const AsmLexer&); // DO NOT IMPLEMENT
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AsmLexer(const AsmLexer&); // DO NOT IMPLEMENT
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public:
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AsmLexer(SourceMgr &SrcMgr);
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~AsmLexer();
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asmtok::TokKind Lex() {
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return CurKind = LexToken();
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}
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asmtok::TokKind getKind() const { return CurKind; }
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bool is(asmtok::TokKind K) const { return CurKind == K; }
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bool isNot(asmtok::TokKind K) const { return CurKind != K; }
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const char *getCurStrVal() const {
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assert((CurKind == asmtok::Identifier || CurKind == asmtok::Register ||
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CurKind == asmtok::String) &&
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"This token doesn't have a string value");
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return CurStrVal;
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}
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int64_t getCurIntVal() const {
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assert(CurKind == asmtok::IntVal && "This token isn't an integer");
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return CurIntVal;
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}
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SMLoc getLoc() const;
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/// EnterIncludeFile - Enter the specified file. This returns true on failure.
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bool EnterIncludeFile(const std::string &Filename);
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void PrintMessage(SMLoc Loc, const std::string &Msg, const char *Type) const;
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private:
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int getNextChar();
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asmtok::TokKind ReturnError(const char *Loc, const std::string &Msg);
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/// LexToken - Read the next token and return its code.
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asmtok::TokKind LexToken();
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asmtok::TokKind LexIdentifier();
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asmtok::TokKind LexPercent();
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asmtok::TokKind LexSlash();
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asmtok::TokKind LexLineComment();
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asmtok::TokKind LexDigit();
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asmtok::TokKind LexQuote();
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};
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} // end namespace llvm
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#endif
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