gecko-dev/tools/dreftool/tokens.cpp

178 строки
5.1 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 "tokens.h"
#include "CScanner.h"
#include "nsString.h"
static nsCAutoString gIdentChars("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_");
static nsCAutoString gDigits("0123456789");
static nsCAutoString gWhitespace(" \n\r\t\b");
static nsCAutoString gNewlines("\r\n");
int CIdentifierToken::consume(char aChar, CScanner& aScanner) {
mTextValue=aChar;
int result=aScanner.readWhile(mTextValue,gIdentChars,false);
return result;
};
int CNumberToken::consume(char aChar, CScanner& aScanner) {
mTextValue=aChar;
int result=aScanner.readWhile(mTextValue,gDigits,false);
return result;
};
int CWhitespaceToken::consume(char aChar, CScanner& aScanner) {
mTextValue=aChar;
int result=aScanner.readWhile(mTextValue,gWhitespace,false);
return result;
};
bool validOperator(nsAFlatCString& aString) {
bool result=false;
int len=aString.Length();
switch(len) {
case 1: return true;
case 3:
result=(aString.Equals(NS_LITERAL_CSTRING("<<=")) ||
aString.Equals(NS_LITERAL_CSTRING(">>=")));
break;
default:
switch(aString[0]) {
case '+': case '=':
case '&': case '|':
case '<': case '>':
if((aString[1]==aString[0]) || (aString[1]=='='))
result=true;
break;
case '-':
if((aString[1]==aString[0]) || (aString[1]=='>'))
result=true;
break;
case ':':
if((len==2) && (aString[1]==aString[0]))
result=true;
break;
case '*':
case '/':
case '^':
case '!':
case '~':
case '%':
if((aString[1]=='='))
result=true;
break;
case '(':
result=aString[1]==')'; break;
case '[':
result=aString[1]==']'; break;
default:
break;
}
break;
}
return result;
}
int COperatorToken::consume(char aChar, CScanner& aScanner) {
int result=0;
mTextValue=aChar;
while((validOperator(mTextValue)) && (kNoError==result)){
result=aScanner.getChar(aChar);
mTextValue+=aChar;
}
if(kNoError==result) {
mTextValue.Truncate(mTextValue.Length()-1);
aScanner.push(aChar);
}
return result;
};
int CCommentToken::consume(char aChar, CScanner& aScanner) {
int result=0;
if('/'==mTextValue[1]) {
result=aScanner.readUntil(mTextValue,gNewlines,false);
}
else {
bool done=false;
nsCAutoString temp("/");
while(!done){
result = aScanner.readUntil(mTextValue,temp,true);
if (kNoError!=result)
break;
char theChar=mTextValue[mTextValue.Length()-2];
done=('*'==theChar);
}
}
return result;
};
int CCompilerDirectiveToken::consume(char aChar, CScanner& aScanner) {
mTextValue=aChar;
int result=aScanner.readUntil(mTextValue,gNewlines,false);
return result;
};
int CSemicolonToken::consume(char aChar, CScanner& aScanner) {
int result=0;
mTextValue=aChar;
return result;
};
int CNewlineToken::consume(char aChar, CScanner& aScanner) {
mTextValue=aChar;
int result=aScanner.readWhile(mTextValue,gNewlines,false);
return result;
};
int CQuotedStringToken::consume(char aChar, CScanner& aScanner) {
mTextValue=aChar;
int result=aScanner.readUntil(mTextValue,aChar,true);
return result;
};