gecko/xpcom/ds/nsWhitespaceTokenizer.h

108 lines
2.5 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#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.
*/
bool 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;
bool 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.
*/
bool 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;
bool isWhitespace(char aChar)
{
return aChar <= ' ' &&
(aChar == ' ' || aChar == '\n' ||
aChar == '\r'|| aChar == '\t');
}
};
#endif /* __nsWhitespaceTokenizer_h */