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/*
* Copyright (c) 2003 Rozhuk Ivan <rozhuk.im@gmail.com>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
*/
#if !defined(AFX_MEMORYCOMPARE__H__INCLUDED_)
#define AFX_MEMORYCOMPARE__H__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// If the string pointed to by lpString1 is less than the string pointed
// to by lpString2, the return value is negative.
// If the string pointed to by lpString1 is greater than the string pointed
// to by lpString2, the return value is positive.
// If the strings are equal, the return value is zero.
//
// lpString1<lpString2 >> ret=1=CSTR_LESS_THAN
// lpString1=lpString2 >> ret=2=CSTR_EQUAL
// lpString1>lpString2 >> ret=3=CSTR_GREATER_THAN
#define CMEM_EQUAL 0
#define CMEM_GREATER_THAN 1
#define CMEM_LESS_THAN 2
__inline unsigned int MemoryCompare(const void *pBuff1,size_t dwBuff1Size,const void *pBuff2,size_t dwBuff2Size)
{
unsigned int uiRet;
if (dwBuff1Size==dwBuff2Size)
{
if (pBuff1==pBuff2)
{
uiRet=CMEM_EQUAL;
}else{
if (pBuff1 && pBuff2)
{
int iRet;
iRet=memcmp(pBuff1,pBuff2,dwBuff1Size);
if (iRet==0)
{
uiRet=CMEM_EQUAL;
}else{
if (iRet<0)
{
uiRet=CMEM_GREATER_THAN;
}else{
uiRet=CMEM_LESS_THAN;
}
}
}else{
if (pBuff1)
{//pBuff2==NULL
uiRet=CMEM_GREATER_THAN;
}else{//pBuff1==NULL
uiRet=CMEM_LESS_THAN;
}
}
}
}else{
if (dwBuff1Size<dwBuff2Size)
{
uiRet=CMEM_LESS_THAN;
}else{
uiRet=CMEM_GREATER_THAN;
}
}
return(uiRet);
}
#endif // !defined(AFX_MEMORYCOMPARE__H__INCLUDED_)
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