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First check-in of NxWidgets

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4505 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2012-03-22 21:22:59 +00:00
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libnxwidgets/src/cstringiterator.cxx Normal file
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/****************************************************************************
* NxWidgets/libnxwidgets/src/cgraphicsport.cxx
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX, NxWidgets, nor the names of its contributors
* me be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************
*
* Portions of this package derive from Woopsi (http://woopsi.org/) and
* portions are original efforts. It is difficult to determine at this
* point what parts are original efforts and which parts derive from Woopsi.
* However, in any event, the work of Antony Dzeryn will be acknowledged
* in most NxWidget files. Thanks Antony!
*
* Copyright (c) 2007-2011, Antony Dzeryn
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the names "Woopsi", "Simian Zombie" nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Antony Dzeryn ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Antony Dzeryn BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include "cnxstring.hxx"
#include "cstringiterator.hxx"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Method Implementations
****************************************************************************/
using namespace NXWidgets;
/**
* Constructor. Moves the iterator to the first character in the string.
*
* @param string Pointer to the string that will be iterated over.
*/
CStringIterator::CStringIterator(FAR const CNxString* string)
{
m_pString = string;
m_pCurrentChar = m_pString->getCharArray();
m_currentIndex = 0;
}
/**
* Moves the iterator to the first character in the string.
*
* @param Returns false if the string is empty
*/
bool CStringIterator::moveToFirst()
{
int length = m_pString->getLength();
if (length > 0)
{
m_pCurrentChar = m_pString->getCharArray();
m_currentIndex = 0;
return true;
}
return false;
}
/**
* Moves the iterator to the last character in the string.
*
* @param Returns false if the string is empty
*/
bool CStringIterator::moveToLast(void)
{
int length = m_pString->getLength();
if (length > 0)
{
m_pCurrentChar = m_pString->getCharArray() + length - 1;
m_currentIndex = length - 1;
return true;
}
return false;
}
/**
* Move the iterator to the next character in the string.
*
* @return True if the iterator moved; false if not (indicates end of string).
*/
bool CStringIterator::moveToNext(void)
{
if (m_currentIndex < m_pString->getLength() - 1)
{
m_pCurrentChar++;
m_currentIndex++;
return true;
}
return false;
}
/**
* Move the iterator to the previous character in the string.
*
* @return True if the iterator moved; false if not (indicates start of string).
*/
bool CStringIterator::moveToPrevious(void)
{
if (m_currentIndex > 0)
{
m_pCurrentChar--;
m_currentIndex--;
return true;
}
return false;
}
/**
* Move the iterator to the specified index.
*
* @param index The index to move to.
* @return True if the iterator moved; false if not (indicates end of string).
*/
bool CStringIterator::moveTo(int index)
{
// Abort if index exceeds the size of the string
if (index < m_pString->getLength())
{
// Move to the requested position
m_pCurrentChar = m_pString->getCharArray() + index;
m_currentIndex = index;
return true;
}
return false;
}