зеркало из https://github.com/mozilla/gecko-dev.git
89 строки
2.4 KiB
C++
89 строки
2.4 KiB
C++
/*================================================================*
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Copyright © 1998 Rick Gessner. All Rights Reserved.
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*================================================================*/
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#include "CCPPTokenizer.h"
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#include "CScanner.h"
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#include "CToken.h"
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#include "tokens.h"
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#include <ctype.h>
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CCPPTokenizer::CCPPTokenizer() : mTokens(0) {
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}
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/********************************************************
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* Process: Destroy the tokenizer
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* Usage:
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* Calls:
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* Notes:
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*********************************************************/
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CCPPTokenizer::~CCPPTokenizer() {
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CToken* theToken=0;
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while(theToken=(CToken*)mTokens.Pop()){
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delete theToken;
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}
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}
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int consumeToken(CScanner& aScanner,CToken** aToken){
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static nsCAutoString gOperatorChars("/?.<>[]{}~^+=-!%&*(),|:");
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PRUnichar theChar=0;
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int result=aScanner.getChar(theChar);
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if(kNoError==result){
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if((isspace(theChar)) || (theChar>=kSpace)) {
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if('#'==theChar)
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*aToken=(CToken*)new CCompilerDirectiveToken();
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else if((theChar=='_') || (isalpha(theChar)))
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*aToken=(CToken*)new CIdentifierToken();
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else if(isdigit(theChar))
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*aToken=(CToken*)new CNumberToken();
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else if((kLF==theChar) || (kCR==theChar))
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*aToken=(CToken*)new CNewlineToken();
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else if(isspace(theChar))
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*aToken=(CToken*)new CWhitespaceToken();
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else if(-1<gOperatorChars.Find(theChar)) {
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PRUnichar nextChar;
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aScanner.peek(nextChar);
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if((kForwardSlash==theChar) && ((kForwardSlash==nextChar) || (kAsterisk==nextChar))){
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*aToken=(CToken*)new CCommentToken(nextChar);
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}
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else *aToken=(CToken*)new COperatorToken();
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}
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else if((kQuote==theChar) || (kApostrophe==theChar))
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*aToken=(CToken*)new CQuotedStringToken();
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else if(kSemicolon==theChar) {
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*aToken=(CToken*)new CSemicolonToken();
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}
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if(*aToken){
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result=(*aToken)->consume(theChar,aScanner);
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}
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}
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}
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return result;
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}
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int CCPPTokenizer::tokenize(CScanner& aScanner){
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int result=0;
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while(kNoError==result){
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CToken* theToken=0;
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result=consumeToken(aScanner,&theToken);
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if(theToken) {
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//theToken->debugDumpSource(cout);
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mTokens.Push(theToken);
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}
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}
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return result;
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}
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CToken* CCPPTokenizer::getTokenAt(int anIndex){
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if((anIndex>=0) && (anIndex<mTokens.GetSize())){
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return (CToken*)mTokens.ObjectAt(anIndex);
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}
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return 0;
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}
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