move some files out of the llvm-mc tool into the MCParser library so

other tools can link it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94131 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 304 deletions

diff --git a/tools/llvm-mc/AsmLexer.cpp b/tools/llvm-mc/AsmLexer.cpp
deleted file mode 100644
index de61e7f5b7..0000000000
--- a/tools/llvm-mc/AsmLexer.cpp
+++ /dev/null
@@ -1,304 +0,0 @@
-//===- AsmLexer.cpp - Lexer for Assembly Files ----------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This class implements the lexer for assembly files.
-//
-//===----------------------------------------------------------------------===//
-
-#include "AsmLexer.h"
-#include "llvm/Support/SMLoc.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include <cerrno>
-#include <cstdio>
-#include <cstdlib>
-using namespace llvm;
-
-AsmLexer::AsmLexer(const MCAsmInfo &_MAI) : MAI(_MAI)  {
-  CurBuf = NULL;
-  CurPtr = NULL;
-  TokStart = 0;
-}
-
-AsmLexer::~AsmLexer() {
-}
-
-void AsmLexer::setBuffer(const MemoryBuffer *buf, const char *ptr) {
-  CurBuf = buf;
-  
-  if (ptr)
-    CurPtr = ptr;
-  else
-    CurPtr = CurBuf->getBufferStart();
-  
-  TokStart = 0;
-}
-
-SMLoc AsmLexer::getLoc() const {
-  return SMLoc::getFromPointer(TokStart);
-}
-
-/// ReturnError - Set the error to the specified string at the specified
-/// location.  This is defined to always return AsmToken::Error.
-AsmToken AsmLexer::ReturnError(const char *Loc, const std::string &Msg) {
-  SetError(SMLoc::getFromPointer(Loc), Msg);
-  
-  return AsmToken(AsmToken::Error, StringRef(Loc, 0));
-}
-
-int AsmLexer::getNextChar() {
-  char CurChar = *CurPtr++;
-  switch (CurChar) {
-  default:
-    return (unsigned char)CurChar;
-  case 0:
-    // A nul character in the stream is either the end of the current buffer or
-    // a random nul in the file.  Disambiguate that here.
-    if (CurPtr-1 != CurBuf->getBufferEnd())
-      return 0;  // Just whitespace.
-    
-    // Otherwise, return end of file.
-    --CurPtr;  // Another call to lex will return EOF again.  
-    return EOF;
-  }
-}
-
-/// LexIdentifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
-AsmToken AsmLexer::LexIdentifier() {
-  while (isalnum(*CurPtr) || *CurPtr == '_' || *CurPtr == '$' ||
-         *CurPtr == '.' || *CurPtr == '@')
-    ++CurPtr;
-  return AsmToken(AsmToken::Identifier, StringRef(TokStart, CurPtr - TokStart));
-}
-
-/// LexSlash: Slash: /
-///           C-Style Comment: /* ... */
-AsmToken AsmLexer::LexSlash() {
-  switch (*CurPtr) {
-  case '*': break; // C style comment.
-  case '/': return ++CurPtr, LexLineComment();
-  default:  return AsmToken(AsmToken::Slash, StringRef(CurPtr, 1));
-  }
-
-  // C Style comment.
-  ++CurPtr;  // skip the star.
-  while (1) {
-    int CurChar = getNextChar();
-    switch (CurChar) {
-    case EOF:
-      return ReturnError(TokStart, "unterminated comment");
-    case '*':
-      // End of the comment?
-      if (CurPtr[0] != '/') break;
-      
-      ++CurPtr;   // End the */.
-      return LexToken();
-    }
-  }
-}
-
-/// LexLineComment: Comment: #[^\n]*
-///                        : //[^\n]*
-AsmToken AsmLexer::LexLineComment() {
-  // FIXME: This is broken if we happen to a comment at the end of a file, which
-  // was .included, and which doesn't end with a newline.
-  int CurChar = getNextChar();
-  while (CurChar != '\n' && CurChar != '\n' && CurChar != EOF)
-    CurChar = getNextChar();
-  
-  if (CurChar == EOF)
-    return AsmToken(AsmToken::Eof, StringRef(CurPtr, 0));
-  return AsmToken(AsmToken::EndOfStatement, StringRef(CurPtr, 0));
-}
-
-
-/// LexDigit: First character is [0-9].
-///   Local Label: [0-9][:]
-///   Forward/Backward Label: [0-9][fb]
-///   Binary integer: 0b[01]+
-///   Octal integer: 0[0-7]+
-///   Hex integer: 0x[0-9a-fA-F]+
-///   Decimal integer: [1-9][0-9]*
-/// TODO: FP literal.
-AsmToken AsmLexer::LexDigit() {
-  if (*CurPtr == ':')
-    return ReturnError(TokStart, "FIXME: local label not implemented");
-  if (*CurPtr == 'f' || *CurPtr == 'b')
-    return ReturnError(TokStart, "FIXME: directional label not implemented");
-  
-  // Decimal integer: [1-9][0-9]*
-  if (CurPtr[-1] != '0') {
-    while (isdigit(*CurPtr))
-      ++CurPtr;
-    return AsmToken(AsmToken::Integer, StringRef(TokStart, CurPtr - TokStart), 
-                    strtoll(TokStart, 0, 10));
-  }
-  
-  if (*CurPtr == 'b') {
-    ++CurPtr;
-    const char *NumStart = CurPtr;
-    while (CurPtr[0] == '0' || CurPtr[0] == '1')
-      ++CurPtr;
-    
-    // Requires at least one binary digit.
-    if (CurPtr == NumStart)
-      return ReturnError(CurPtr-2, "Invalid binary number");
-    return AsmToken(AsmToken::Integer, StringRef(TokStart, CurPtr - TokStart),
-                    strtoll(NumStart, 0, 2));
-  }
- 
-  if (*CurPtr == 'x') {
-    ++CurPtr;
-    const char *NumStart = CurPtr;
-    while (isxdigit(CurPtr[0]))
-      ++CurPtr;
-    
-    // Requires at least one hex digit.
-    if (CurPtr == NumStart)
-      return ReturnError(CurPtr-2, "Invalid hexadecimal number");
-
-    unsigned long long Result;
-    if (StringRef(TokStart, CurPtr - TokStart).getAsInteger(0, Result))
-      return ReturnError(CurPtr-2, "Invalid hexadecimal number");
-      
-    return AsmToken(AsmToken::Integer, StringRef(TokStart, CurPtr - TokStart),
-                    (int64_t)Result);
-  }
-  
-  // Must be an octal number, it starts with 0.
-  while (*CurPtr >= '0' && *CurPtr <= '7')
-    ++CurPtr;
-  return AsmToken(AsmToken::Integer, StringRef(TokStart, CurPtr - TokStart),
-                  strtoll(TokStart, 0, 8));
-}
-
-/// LexQuote: String: "..."
-AsmToken AsmLexer::LexQuote() {
-  int CurChar = getNextChar();
-  // TODO: does gas allow multiline string constants?
-  while (CurChar != '"') {
-    if (CurChar == '\\') {
-      // Allow \", etc.
-      CurChar = getNextChar();
-    }
-    
-    if (CurChar == EOF)
-      return ReturnError(TokStart, "unterminated string constant");
-
-    CurChar = getNextChar();
-  }
-  
-  return AsmToken(AsmToken::String, StringRef(TokStart, CurPtr - TokStart));
-}
-
-StringRef AsmLexer::LexUntilEndOfStatement() {
-  TokStart = CurPtr;
-
-  while (!isAtStartOfComment(*CurPtr) && // Start of line comment.
-	  *CurPtr != ';' &&  // End of statement marker.
-         *CurPtr != '\n' &&
-         *CurPtr != '\r' &&
-         (*CurPtr != 0 || CurPtr != CurBuf->getBufferEnd())) {
-    ++CurPtr;
-  }
-  return StringRef(TokStart, CurPtr-TokStart);
-}
-
-bool AsmLexer::isAtStartOfComment(char Char) {
-  // FIXME: This won't work for multi-character comment indicators like "//".
-  return Char == *MAI.getCommentString();
-}
-
-AsmToken AsmLexer::LexToken() {
-  TokStart = CurPtr;
-  // This always consumes at least one character.
-  int CurChar = getNextChar();
-  
-  if (isAtStartOfComment(CurChar))
-    return LexLineComment();
-
-  switch (CurChar) {
-  default:
-    // Handle identifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
-    if (isalpha(CurChar) || CurChar == '_' || CurChar == '.')
-      return LexIdentifier();
-    
-    // Unknown character, emit an error.
-    return ReturnError(TokStart, "invalid character in input");
-  case EOF: return AsmToken(AsmToken::Eof, StringRef(TokStart, 0));
-  case 0:
-  case ' ':
-  case '\t':
-    // Ignore whitespace.
-    return LexToken();
-  case '\n': // FALL THROUGH.
-  case '\r': // FALL THROUGH.
-  case ';': return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 1));
-  case ':': return AsmToken(AsmToken::Colon, StringRef(TokStart, 1));
-  case '+': return AsmToken(AsmToken::Plus, StringRef(TokStart, 1));
-  case '-': return AsmToken(AsmToken::Minus, StringRef(TokStart, 1));
-  case '~': return AsmToken(AsmToken::Tilde, StringRef(TokStart, 1));
-  case '(': return AsmToken(AsmToken::LParen, StringRef(TokStart, 1));
-  case ')': return AsmToken(AsmToken::RParen, StringRef(TokStart, 1));
-  case '[': return AsmToken(AsmToken::LBrac, StringRef(TokStart, 1));
-  case ']': return AsmToken(AsmToken::RBrac, StringRef(TokStart, 1));
-  case '{': return AsmToken(AsmToken::LCurly, StringRef(TokStart, 1));
-  case '}': return AsmToken(AsmToken::RCurly, StringRef(TokStart, 1));
-  case '*': return AsmToken(AsmToken::Star, StringRef(TokStart, 1));
-  case ',': return AsmToken(AsmToken::Comma, StringRef(TokStart, 1));
-  case '$': return AsmToken(AsmToken::Dollar, StringRef(TokStart, 1));
-  case '=': 
-    if (*CurPtr == '=')
-      return ++CurPtr, AsmToken(AsmToken::EqualEqual, StringRef(TokStart, 2));
-    return AsmToken(AsmToken::Equal, StringRef(TokStart, 1));
-  case '|': 
-    if (*CurPtr == '|')
-      return ++CurPtr, AsmToken(AsmToken::PipePipe, StringRef(TokStart, 2));
-    return AsmToken(AsmToken::Pipe, StringRef(TokStart, 1));
-  case '^': return AsmToken(AsmToken::Caret, StringRef(TokStart, 1));
-  case '&': 
-    if (*CurPtr == '&')
-      return ++CurPtr, AsmToken(AsmToken::AmpAmp, StringRef(TokStart, 2));
-    return AsmToken(AsmToken::Amp, StringRef(TokStart, 1));
-  case '!': 
-    if (*CurPtr == '=')
-      return ++CurPtr, AsmToken(AsmToken::ExclaimEqual, StringRef(TokStart, 2));
-    return AsmToken(AsmToken::Exclaim, StringRef(TokStart, 1));
-  case '%': return AsmToken(AsmToken::Percent, StringRef(TokStart, 1));
-  case '/': return LexSlash();
-  case '#': return AsmToken(AsmToken::Hash, StringRef(TokStart, 1));
-  case '"': return LexQuote();
-  case '0': case '1': case '2': case '3': case '4':
-  case '5': case '6': case '7': case '8': case '9':
-    return LexDigit();
-  case '<':
-    switch (*CurPtr) {
-    case '<': return ++CurPtr, AsmToken(AsmToken::LessLess, 
-                                        StringRef(TokStart, 2));
-    case '=': return ++CurPtr, AsmToken(AsmToken::LessEqual, 
-                                        StringRef(TokStart, 2));
-    case '>': return ++CurPtr, AsmToken(AsmToken::LessGreater, 
-                                        StringRef(TokStart, 2));
-    default: return AsmToken(AsmToken::Less, StringRef(TokStart, 1));
-    }
-  case '>':
-    switch (*CurPtr) {
-    case '>': return ++CurPtr, AsmToken(AsmToken::GreaterGreater, 
-                                        StringRef(TokStart, 2));
-    case '=': return ++CurPtr, AsmToken(AsmToken::GreaterEqual, 
-                                        StringRef(TokStart, 2));
-    default: return AsmToken(AsmToken::Greater, StringRef(TokStart, 1));
-    }
-      
-  // TODO: Quoted identifiers (objc methods etc)
-  // local labels: [0-9][:]
-  // Forward/backward labels: [0-9][fb]
-  // Integers, fp constants, character constants.
-  }
-}