// distribution boxbackup-0.11.1 (svn version: 2821_2827)
// Box Backup, http://www.boxbackup.org/
// 
// Copyright (c) 2003-2010, Ben Summers and contributors.
// All rights reserved.
// 
// Note that this project uses mixed licensing. Any file with this license
// attached, or where the code LICENSE-DUAL appears on the first line, falls
// under this license. See the file COPYING.txt for more information.
// 
// This file is dual licensed. You may use and distribute it providing that you
// comply EITHER with the terms of the BSD license, OR the GPL license. It is
// not necessary to comply with both licenses, only one.
// 
// The BSD license option follows:
// 
// 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 of the Box Backup 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 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 HOLDER 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.
// 
// [http://en.wikipedia.org/wiki/BSD_licenses#3-clause_license_.28.22New_BSD_License.22.29]
// 
// The GPL license option follows:
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
// 
// [http://www.gnu.org/licenses/old-licenses/gpl-2.0.html#SEC4]
// --------------------------------------------------------------------------
//
// File
//		Name:    ConversionString.cpp
//		Purpose: Conversions to and from strings
//		Created: 9/4/04
//
// --------------------------------------------------------------------------

#include "Box.h"

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>

#include "Conversion.h"
#include "autogen_ConversionException.h"

#include "MemLeakFindOn.h"

// --------------------------------------------------------------------------
//
// Function
//		Name:    BoxConvert::_ConvertStringToInt(const char *, int)
//		Purpose: Convert from string to integer, with range checking.
//				 Always does signed -- no point in unsigned as C++ type checking
//				 isn't up to handling it properly.
//				 If a null pointer is passed in, then returns 0.
//		Created: 9/4/04
//
// --------------------------------------------------------------------------
int32_t BoxConvert::_ConvertStringToInt(const char *pString, int Size)
{
	// Handle null strings gracefully.
	if(pString == 0)
	{
		return 0;
	}

	// Check for initial validity
	if(*pString == '\0')
	{
		THROW_EXCEPTION(ConversionException, CannotConvertEmptyStringToInt)
	}
	
	// Convert.
	char *numEnd = 0;
	errno = 0;			// Some platforms don't reset it.
	long r = ::strtol(pString, &numEnd, 0);

	// Check that all the characters were used
	if(*numEnd != '\0')
	{
		THROW_EXCEPTION(ConversionException, BadStringRepresentationOfInt)
	}
	
	// Error check
	if(r == 0 && errno == EINVAL)
	{
		THROW_EXCEPTION(ConversionException, BadStringRepresentationOfInt)
	}

	// Range check from strtol
	if((r == LONG_MIN || r == LONG_MAX) && errno == ERANGE)
	{
		THROW_EXCEPTION(ConversionException, IntOverflowInConvertFromString)
	}
	
	// Check range for size of integer
	switch(Size)
	{
	case 32:
		{
			// No extra checking needed if long is an int32
			if(sizeof(long) > sizeof(int32_t))
			{
				if(r <= (0 - 0x7fffffffL) || r > 0x7fffffffL)
				{
					THROW_EXCEPTION(ConversionException, IntOverflowInConvertFromString)
				}
			}
			break;
		}

	case 16:
		{
			if(r <= (0 - 0x7fff) || r > 0x7fff)
			{
				THROW_EXCEPTION(ConversionException, IntOverflowInConvertFromString)
			}
			break;
		}
	
	case 8:
		{
			if(r <= (0 - 0x7f) || r > 0x7f)
			{
				THROW_EXCEPTION(ConversionException, IntOverflowInConvertFromString)
			}
			break;
		}
		
	default:
		{
			THROW_EXCEPTION(ConversionException, BadIntSize)
			break;
		}
	}
	
	// Return number
	return r;
}

// --------------------------------------------------------------------------
//
// Function
//		Name:    BoxConvert::_ConvertIntToString(std::string &, int32_t)
//		Purpose: Convert signed interger to a string
//		Created: 9/4/04
//
// --------------------------------------------------------------------------
void BoxConvert::_ConvertIntToString(std::string &rTo, int32_t From)
{
	char text[64];	// size more than enough
	::sprintf(text, "%d", (int)From);
	rTo = text;
}

