gecko-dev/tools/dreftool/CCPPTokenizer.cpp

123 строки
3.9 KiB
C++

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Dreftool.
*
* The Initial Developer of the Original Code is
* Rick Gessner <rick@gessner.com>.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Kenneth Herron <kjh-5727@comcast.net>
* Bernd Mielke <bmlk@gmx.de>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "CCPPTokenizer.h"
#include "CScanner.h"
#include "CToken.h"
#include "tokens.h"
#include <ctype.h>
CCPPTokenizer::CCPPTokenizer() : mTokens(0) {
}
/********************************************************
* Process: Destroy the tokenizer
* Usage:
* Calls:
* Notes:
*********************************************************/
CCPPTokenizer::~CCPPTokenizer() {
CToken* theToken=0;
while((theToken=(CToken*)mTokens.Pop())){
delete theToken;
}
}
int consumeToken(CScanner& aScanner,CToken** aToken){
static nsCAutoString gOperatorChars("/?.<>[]{}~^+=-!%&*(),|:");
char theChar=0;
int result=aScanner.getChar(theChar);
if(kNoError==result){
if((isspace(theChar)) || (theChar>=kSpace)) {
if('#'==theChar)
*aToken=(CToken*)new CCompilerDirectiveToken();
else if((theChar=='_') || (isalpha(theChar)))
*aToken=(CToken*)new CIdentifierToken();
else if(isdigit(theChar))
*aToken=(CToken*)new CNumberToken();
else if((kLF==theChar) || (kCR==theChar))
*aToken=(CToken*)new CNewlineToken();
else if(isspace(theChar))
*aToken=(CToken*)new CWhitespaceToken();
else if(-1<gOperatorChars.FindChar(theChar)) {
PRUnichar nextChar;
aScanner.peek(nextChar);
if((kForwardSlash==theChar) && ((kForwardSlash==nextChar) || (kAsterisk==nextChar))){
*aToken=(CToken*)new CCommentToken(nextChar);
}
else *aToken=(CToken*)new COperatorToken();
}
else if((kQuote==theChar) || (kApostrophe==theChar))
*aToken=(CToken*)new CQuotedStringToken();
else if(kSemicolon==theChar) {
*aToken=(CToken*)new CSemicolonToken();
}
if(*aToken){
result=(*aToken)->consume(theChar,aScanner);
}
}
}
return result;
}
int32 CCPPTokenizer::tokenize(CScanner& aScanner){
int result=0;
while(kNoError==result){
CToken* theToken=0;
result=consumeToken(aScanner,&theToken);
if(theToken) {
mTokens.Push(theToken);
}
}
return result;
}
CToken* CCPPTokenizer::getTokenAt(int anIndex){
if((anIndex>=0) && (anIndex<mTokens.GetSize())){
return (CToken*)mTokens.ObjectAt(anIndex);
}
return 0;
}