#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();
TokStart = 0;
}
+AsmLexer::~AsmLexer() {
+}
+
SMLoc AsmLexer::getLoc() const {
return SMLoc::getFromPointer(TokStart);
}
-void AsmLexer::PrintMessage(SMLoc Loc, const std::string &Msg) const {
- SrcMgr.PrintMessage(Loc, Msg);
+void AsmLexer::PrintMessage(SMLoc Loc, const std::string &Msg,
+ const char *Type) const {
+ SrcMgr.PrintMessage(Loc, Msg, Type);
}
/// 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) {
- SrcMgr.PrintMessage(SMLoc::getFromPointer(Loc), Msg);
- return asmtok::Error;
+/// location. This is defined to always return AsmToken::Error.
+AsmToken AsmLexer::ReturnError(const char *Loc, const std::string &Msg) {
+ SrcMgr.PrintMessage(SMLoc::getFromPointer(Loc), Msg, "error");
+ return AsmToken(AsmToken::Error, StringRef(Loc, 0));
+}
+
+/// EnterIncludeFile - Enter the specified file. This prints an error and
+/// returns true on failure.
+bool AsmLexer::EnterIncludeFile(const std::string &Filename) {
+ int NewBuf = SrcMgr.AddIncludeFile(Filename, SMLoc::getFromPointer(CurPtr));
+ if (NewBuf == -1)
+ return true;
+
+ // Save the line number and lex buffer of the includer.
+ CurBuffer = NewBuf;
+ CurBuf = SrcMgr.getMemoryBuffer(CurBuffer);
+ CurPtr = CurBuf->getBufferStart();
+ return false;
}
+
int AsmLexer::getNextChar() {
char CurChar = *CurPtr++;
switch (CurChar) {
CurBuffer = SrcMgr.FindBufferContainingLoc(ParentIncludeLoc);
CurBuf = SrcMgr.getMemoryBuffer(CurBuffer);
CurPtr = ParentIncludeLoc.getPointer();
+
+ // Reset the token start pointer to the start of the new file.
+ TokStart = CurPtr;
+
return getNextChar();
}
}
/// LexIdentifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
-asmtok::TokKind AsmLexer::LexIdentifier() {
+AsmToken AsmLexer::LexIdentifier() {
while (isalnum(*CurPtr) || *CurPtr == '_' || *CurPtr == '$' ||
*CurPtr == '.' || *CurPtr == '@')
++CurPtr;
- CurStrVal.assign(TokStart, CurPtr);
- return asmtok::Identifier;
+ return AsmToken(AsmToken::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(AsmToken::Percent, StringRef(CurPtr, 1)); // Single %.
while (isalnum(*CurPtr))
++CurPtr;
- CurStrVal.assign(TokStart, CurPtr); // Include %
- return asmtok::Register;
+
+ return AsmToken(AsmToken::Register, StringRef(TokStart, CurPtr - TokStart));
}
/// LexSlash: Slash: /
/// C-Style Comment: /* ... */
-asmtok::TokKind AsmLexer::LexSlash() {
- if (*CurPtr != '*')
- return asmtok::Slash;
+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.
}
}
-/// LexHash: Comment: #[^\n]*
-asmtok::TokKind AsmLexer::LexHash() {
+/// 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 asmtok::Eof;
- return asmtok::EndOfStatement;
+ return AsmToken(AsmToken::Eof, StringRef(CurPtr, 0));
+ return AsmToken(AsmToken::EndOfStatement, StringRef(CurPtr, 0));
}
/// 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')
if (CurPtr[-1] != '0') {
while (isdigit(*CurPtr))
++CurPtr;
- CurIntVal = strtoll(TokStart, 0, 10);
- return asmtok::IntVal;
+ return AsmToken(AsmToken::Integer, StringRef(TokStart, CurPtr - TokStart),
+ strtoll(TokStart, 0, 10));
}
if (*CurPtr == 'b') {
// 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(AsmToken::Integer, StringRef(TokStart, CurPtr - TokStart),
+ strtoll(NumStart, 0, 2));
}
if (*CurPtr == 'x') {
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(AsmToken::Integer, 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(AsmToken::Integer, 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 != '"') {
CurChar = getNextChar();
}
- CurStrVal.assign(TokStart, CurPtr); // include quotes.
- return asmtok::String;
+ return AsmToken(AsmToken::String, StringRef(TokStart, CurPtr - TokStart));
}
+StringRef AsmLexer::LexUntilEndOfStatement() {
+ TokStart = CurPtr;
+
+ while (*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);
+}
-asmtok::TokKind AsmLexer::LexToken() {
+AsmToken AsmLexer::LexToken() {
TokStart = CurPtr;
// This always consumes at least one character.
int CurChar = getNextChar();
// Unknown character, emit an error.
return ReturnError(TokStart, "invalid character in input");
- case EOF: return asmtok::Eof;
+ case EOF: return AsmToken(AsmToken::Eof, StringRef(TokStart, 0));
case 0:
case ' ':
case '\t':
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 '$': return asmtok::Dollar;
- case '|': return asmtok::Pipe;
- case '^': return asmtok::Caret;
- case '&': return asmtok::Amp;
- case '!': return asmtok::Exclaim;
+ case ';': return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 1));
+ case ':': return AsmToken(AsmToken::Colon, StringRef(TokStart, 1));
+ case '+': return AsmToken(AsmToken::Plus, StringRef(TokStart, 1));
+ case '-': return AsmToken(AsmToken::Minus, StringRef(TokStart, 1));
+ case '~': return AsmToken(AsmToken::Tilde, StringRef(TokStart, 1));
+ case '(': return AsmToken(AsmToken::LParen, StringRef(TokStart, 1));
+ case ')': return AsmToken(AsmToken::RParen, StringRef(TokStart, 1));
+ case '*': return AsmToken(AsmToken::Star, StringRef(TokStart, 1));
+ case ',': return AsmToken(AsmToken::Comma, StringRef(TokStart, 1));
+ case '$': 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 LexPercent();
case '/': return LexSlash();
- case '#': return LexHash();
+ case '#': return LexLineComment();
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 '<':
- if (*CurPtr == '<') {
- ++CurPtr;
- return asmtok::LessLess;
+ 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));
}
- // Don't have any use for bare '<' yet.
- return ReturnError(TokStart, "invalid character in input");
case '>':
- if (*CurPtr == '>') {
- ++CurPtr;
- return asmtok::GreaterGreater;
+ 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));
}
- // Don't have any use for bare '>' yet.
- return ReturnError(TokStart, "invalid character in input");
// TODO: Quoted identifiers (objc methods etc)
// local labels: [0-9][:]
projects / oota-llvm.git / blobdiff