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/* $Id: kHlpMemICompAscii.c 29 2009-07-01 20:30:29Z bird $ */
/** @file
* kHlpString - kHlpMemICompAscii.
*/
/*
* Copyright (c) 2006-2007 Knut St. Osmundsen <bird-kStuff-spamix@anduin.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <k/kHlpString.h>
KHLP_DECL(int) kHlpMemICompAscii(const void *pv1, const void *pv2, KSIZE cb)
{
union
{
const void *pv;
const KU8 *pb;
const KUPTR *pu;
} u1, u2;
u1.pv = pv1;
u2.pv = pv2;
if (cb >= 32)
{
while (cb > sizeof(KUPTR))
{
if (*u1.pu != *u2.pu)
break; /* hand it on to the byte-by-byte routine. */
u1.pu++;
u2.pu++;
cb -= sizeof(KUPTR);
}
}
while (cb-- > 0)
{
if (u1.pb != u2.pb)
{
KU8 ch1 = *u1.pb;
KU8 ch2 = *u2.pb;
if (ch1 <= 'Z' && ch1 >= 'A')
ch1 += 'a' - 'A';
if (ch2 <= 'Z' && ch2 >= 'A')
ch2 += 'a' - 'A';
if (ch1 != ch2)
return ch1 > ch2 ? 1 : -1;
}
u1.pb++;
u2.pb++;
}
return 0;
}
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