gecko-dev/xpcom/ds/nsWhitespaceTokenizer.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 TransforMiiX XSLT processor code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Peter Van der Beken <peterv@propagandism.org>
*
* 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 ***** */
#ifndef __nsWhitespaceTokenizer_h
#define __nsWhitespaceTokenizer_h
#include "nsDependentSubstring.h"
class nsWhitespaceTokenizer
{
public:
nsWhitespaceTokenizer(const nsSubstring& aSource)
{
aSource.BeginReading(mIter);
aSource.EndReading(mEnd);
while (mIter != mEnd && isWhitespace(*mIter)) {
++mIter;
}
}
/**
* Checks if any more tokens are available.
*/
PRBool hasMoreTokens()
{
return mIter != mEnd;
}
/**
* Returns the next token.
*/
const nsDependentSubstring nextToken()
{
nsSubstring::const_char_iterator begin = mIter;
while (mIter != mEnd && !isWhitespace(*mIter)) {
++mIter;
}
nsSubstring::const_char_iterator end = mIter;
while (mIter != mEnd && isWhitespace(*mIter)) {
++mIter;
}
return Substring(begin, end);
}
private:
nsSubstring::const_char_iterator mIter, mEnd;
PRBool isWhitespace(PRUnichar aChar)
{
return aChar <= ' ' &&
(aChar == ' ' || aChar == '\n' ||
aChar == '\r'|| aChar == '\t');
}
};
class nsCWhitespaceTokenizer
{
public:
nsCWhitespaceTokenizer(const nsCSubstring& aSource)
{
aSource.BeginReading(mIter);
aSource.EndReading(mEnd);
while (mIter != mEnd && isWhitespace(*mIter)) {
++mIter;
}
}
/**
* Checks if any more tokens are available.
*/
PRBool hasMoreTokens()
{
return mIter != mEnd;
}
/**
* Returns the next token.
*/
const nsDependentCSubstring nextToken()
{
nsCSubstring::const_char_iterator begin = mIter;
while (mIter != mEnd && !isWhitespace(*mIter)) {
++mIter;
}
nsCSubstring::const_char_iterator end = mIter;
while (mIter != mEnd && isWhitespace(*mIter)) {
++mIter;
}
return Substring(begin, end);
}
private:
nsCSubstring::const_char_iterator mIter, mEnd;
PRBool isWhitespace(char aChar)
{
return aChar <= ' ' &&
(aChar == ' ' || aChar == '\n' ||
aChar == '\r'|| aChar == '\t');
}
};
#endif /* __nsWhitespaceTokenizer_h */