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llvm-mc: Factor AsmToken class out of AsmLexer.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77292 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
2009-07-28 03:00:54 +00:00
parent d6aa02de10
commit cb358b63a7
2 changed files with 108 additions and 83 deletions
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119
tools/llvm-mc/AsmLexer.cpp
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@@ -20,10 +20,11 @@
#include <cstdlib>
using namespace llvm;
AsmLexer::AsmLexer(SourceMgr &SM) : SrcMgr(SM) {
AsmLexer::AsmLexer(SourceMgr &SM) : SrcMgr(SM) {
CurBuffer = 0;
CurBuf = SrcMgr.getMemoryBuffer(CurBuffer);
CurPtr = CurBuf->getBufferStart();
CurTok = AsmToken(asmtok::Error, StringRef(CurPtr, 0));
TokStart = 0;
}
@@ -41,9 +42,9 @@ void AsmLexer::PrintMessage(SMLoc Loc, const std::string &Msg,
/// ReturnError - Set the error to the specified string at the specified
/// location. This is defined to always return asmtok::Error.
asmtok::TokKind AsmLexer::ReturnError(const char *Loc, const std::string &Msg) {
AsmToken AsmLexer::ReturnError(const char *Loc, const std::string &Msg) {
SrcMgr.PrintMessage(SMLoc::getFromPointer(Loc), Msg, "error");
return asmtok::Error;
return AsmToken(asmtok::Error, StringRef(Loc, 0));
}
/// EnterIncludeFile - Enter the specified file. This prints an error and
@@ -94,35 +95,31 @@ int AsmLexer::getNextChar() {
}
/// LexIdentifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
asmtok::TokKind AsmLexer::LexIdentifier() {
AsmToken AsmLexer::LexIdentifier() {
while (isalnum(*CurPtr) || *CurPtr == '_' || *CurPtr == '$' ||
*CurPtr == '.' || *CurPtr == '@')
++CurPtr;
// Unique string.
CurStrVal = StringRef(TokStart, CurPtr - TokStart);
return asmtok::Identifier;
return AsmToken(asmtok::Identifier, StringRef(TokStart, CurPtr - TokStart));
}
/// LexPercent: Register: %[a-zA-Z0-9]+
asmtok::TokKind AsmLexer::LexPercent() {
AsmToken AsmLexer::LexPercent() {
if (!isalnum(*CurPtr))
return asmtok::Percent; // Single %.
return AsmToken(asmtok::Percent, StringRef(CurPtr, 1)); // Single %.
while (isalnum(*CurPtr))
++CurPtr;
// Unique string.
CurStrVal = StringRef(TokStart, CurPtr - TokStart);
return asmtok::Register;
return AsmToken(asmtok::Register, StringRef(TokStart, CurPtr - TokStart));
}
/// LexSlash: Slash: /
/// C-Style Comment: /* ... */
asmtok::TokKind AsmLexer::LexSlash() {
AsmToken AsmLexer::LexSlash() {
switch (*CurPtr) {
case '*': break; // C style comment.
case '/': return ++CurPtr, LexLineComment();
default: return asmtok::Slash;
default: return AsmToken(asmtok::Slash, StringRef(CurPtr, 1));
}
// C Style comment.
@@ -144,14 +141,16 @@ asmtok::TokKind AsmLexer::LexSlash() {
/// LexLineComment: Comment: #[^\n]*
/// : //[^\n]*
asmtok::TokKind AsmLexer::LexLineComment() {
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 asmtok::Eof;
return asmtok::EndOfStatement;
return AsmToken(asmtok::Eof, StringRef(CurPtr, 0));
return AsmToken(asmtok::EndOfStatement, StringRef(CurPtr, 0));
}
@@ -163,7 +162,7 @@ asmtok::TokKind AsmLexer::LexLineComment() {
/// Hex integer: 0x[0-9a-fA-F]+
/// Decimal integer: [1-9][0-9]*
/// TODO: FP literal.
asmtok::TokKind AsmLexer::LexDigit() {
AsmToken AsmLexer::LexDigit() {
if (*CurPtr == ':')
return ReturnError(TokStart, "FIXME: local label not implemented");
if (*CurPtr == 'f' || *CurPtr == 'b')
@@ -173,8 +172,8 @@ asmtok::TokKind AsmLexer::LexDigit() {
if (CurPtr[-1] != '0') {
while (isdigit(*CurPtr))
++CurPtr;
CurIntVal = strtoll(TokStart, 0, 10);
return asmtok::IntVal;
return AsmToken(asmtok::IntVal, StringRef(TokStart, CurPtr - TokStart),
strtoll(TokStart, 0, 10));
}
if (*CurPtr == 'b') {
@@ -186,8 +185,8 @@ asmtok::TokKind AsmLexer::LexDigit() {
// Requires at least one binary digit.
if (CurPtr == NumStart)
return ReturnError(CurPtr-2, "Invalid binary number");
CurIntVal = strtoll(NumStart, 0, 2);
return asmtok::IntVal;
return AsmToken(asmtok::IntVal, StringRef(TokStart, CurPtr - TokStart),
strtoll(NumStart, 0, 2));
}
if (*CurPtr == 'x') {
@@ -201,29 +200,28 @@ asmtok::TokKind AsmLexer::LexDigit() {
return ReturnError(CurPtr-2, "Invalid hexadecimal number");
errno = 0;
CurIntVal = strtoll(NumStart, 0, 16);
if (errno == EINVAL)
return ReturnError(CurPtr-2, "Invalid hexadecimal number");
if (errno == ERANGE) {
errno = 0;
CurIntVal = (int64_t)strtoull(NumStart, 0, 16);
if (errno == EINVAL)
return ReturnError(CurPtr-2, "Invalid hexadecimal number");
if (errno == ERANGE)
return ReturnError(CurPtr-2, "Hexadecimal number out of range");
}
return asmtok::IntVal;
return AsmToken(asmtok::IntVal, StringRef(TokStart, CurPtr - TokStart),
(int64_t) strtoull(NumStart, 0, 16));
}
// Must be an octal number, it starts with 0.
while (*CurPtr >= '0' && *CurPtr <= '7')
++CurPtr;
CurIntVal = strtoll(TokStart, 0, 8);
return asmtok::IntVal;
return AsmToken(asmtok::IntVal, StringRef(TokStart, CurPtr - TokStart),
strtoll(TokStart, 0, 8));
}
/// LexQuote: String: "..."
asmtok::TokKind AsmLexer::LexQuote() {
AsmToken AsmLexer::LexQuote() {
int CurChar = getNextChar();
// TODO: does gas allow multiline string constants?
while (CurChar != '"') {
@@ -238,13 +236,11 @@ asmtok::TokKind AsmLexer::LexQuote() {
CurChar = getNextChar();
}
// Unique string, include quotes for now.
CurStrVal = StringRef(TokStart, CurPtr - TokStart);
return asmtok::String;
return AsmToken(asmtok::String, StringRef(TokStart, CurPtr - TokStart));
}
asmtok::TokKind AsmLexer::LexToken() {
AsmToken AsmLexer::LexToken() {
TokStart = CurPtr;
// This always consumes at least one character.
int CurChar = getNextChar();
@@ -257,7 +253,7 @@ asmtok::TokKind AsmLexer::LexToken() {
// Unknown character, emit an error.
return ReturnError(TokStart, "invalid character in input");
case EOF: return asmtok::Eof;
case EOF: return AsmToken(asmtok::Eof, StringRef(TokStart, 0));
case 0:
case ' ':
case '\t':
@@ -265,33 +261,33 @@ asmtok::TokKind AsmLexer::LexToken() {
return LexToken();
case '\n': // FALL THROUGH.
case '\r': // FALL THROUGH.
case ';': return asmtok::EndOfStatement;
case ':': return asmtok::Colon;
case '+': return asmtok::Plus;
case '-': return asmtok::Minus;
case '~': return asmtok::Tilde;
case '(': return asmtok::LParen;
case ')': return asmtok::RParen;
case '*': return asmtok::Star;
case ',': return asmtok::Comma;
case '$': return asmtok::Dollar;
case ';': return AsmToken(asmtok::EndOfStatement, StringRef(TokStart, 1));
case ':': return AsmToken(asmtok::Colon, StringRef(TokStart, 1));
case '+': return AsmToken(asmtok::Plus, StringRef(TokStart, 1));
case '-': return AsmToken(asmtok::Minus, StringRef(TokStart, 1));
case '~': return AsmToken(asmtok::Tilde, StringRef(TokStart, 1));
case '(': return AsmToken(asmtok::LParen, StringRef(TokStart, 1));
case ')': return AsmToken(asmtok::RParen, StringRef(TokStart, 1));
case '*': return AsmToken(asmtok::Star, StringRef(TokStart, 1));
case ',': return AsmToken(asmtok::Comma, StringRef(TokStart, 1));
case '$': return AsmToken(asmtok::Dollar, StringRef(TokStart, 1));
case '=':
if (*CurPtr == '=')
return ++CurPtr, asmtok::EqualEqual;
return asmtok::Equal;
return ++CurPtr, AsmToken(asmtok::EqualEqual, StringRef(TokStart, 2));
return AsmToken(asmtok::Equal, StringRef(TokStart, 1));
case '|':
if (*CurPtr == '|')
return ++CurPtr, asmtok::PipePipe;
return asmtok::Pipe;
case '^': return asmtok::Caret;
return ++CurPtr, AsmToken(asmtok::PipePipe, StringRef(TokStart, 2));
return AsmToken(asmtok::Pipe, StringRef(TokStart, 1));
case '^': return AsmToken(asmtok::Caret, StringRef(TokStart, 1));
case '&':
if (*CurPtr == '&')
return ++CurPtr, asmtok::AmpAmp;
return asmtok::Amp;
return ++CurPtr, AsmToken(asmtok::AmpAmp, StringRef(TokStart, 2));
return AsmToken(asmtok::Amp, StringRef(TokStart, 1));
case '!':
if (*CurPtr == '=')
return ++CurPtr, asmtok::ExclaimEqual;
return asmtok::Exclaim;
return ++CurPtr, AsmToken(asmtok::ExclaimEqual, StringRef(TokStart, 2));
return AsmToken(asmtok::Exclaim, StringRef(TokStart, 1));
case '%': return LexPercent();
case '/': return LexSlash();
case '#': return LexLineComment();
@@ -301,16 +297,21 @@ asmtok::TokKind AsmLexer::LexToken() {
return LexDigit();
case '<':
switch (*CurPtr) {
case '<': return ++CurPtr, asmtok::LessLess;
case '=': return ++CurPtr, asmtok::LessEqual;
case '>': return ++CurPtr, asmtok::LessGreater;
default: return asmtok::Less;
case '<': return ++CurPtr, AsmToken(asmtok::LessLess,
StringRef(TokStart, 2));
case '=': return ++CurPtr, AsmToken(asmtok::LessEqual,
StringRef(TokStart, 2));
case '>': return ++CurPtr, AsmToken(asmtok::LessGreater,
StringRef(TokStart, 2));
default: return AsmToken(asmtok::Less, StringRef(TokStart, 1));
}
case '>':
switch (*CurPtr) {
case '>': return ++CurPtr, asmtok::GreaterGreater;
case '=': return ++CurPtr, asmtok::GreaterEqual;
default: return asmtok::Greater;
case '>': return ++CurPtr, AsmToken(asmtok::GreaterGreater,
StringRef(TokStart, 2));
case '=': return ++CurPtr, AsmToken(asmtok::GreaterEqual,
StringRef(TokStart, 2));
default: return AsmToken(asmtok::Greater, StringRef(TokStart, 1));
}
// TODO: Quoted identifiers (objc methods etc)