kolibrios/programs/develop/open watcom/trunk/clib/memory/memicmp.c

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
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*    The Original Code and all software distributed under the License are
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
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****************************************************************************/


#include "variety.h"
#include <string.h>
#include <ctype.h>

_WCRTLINK int memicmp( const void *in_s1, const void *in_s2, size_t len )
    {
        const unsigned char *   s1 = (const unsigned char *)in_s1;
        const unsigned char *   s2 = (const unsigned char *)in_s2;
        unsigned char           c1;
        unsigned char           c2;

        for( ; len; --len )  {
            c1 = *s1;
            c2 = *s2;
            if( c1 >= 'A'  &&  c1 <= 'Z' )  c1 += 'a' - 'A';
            if( c2 >= 'A'  &&  c2 <= 'Z' )  c2 += 'a' - 'A';
            if( c1 != c2 ) return( c1 - c2 );
            ++s1;
            ++s2;
        }
        return( 0 );    /* both operands are equal */
    }