libc
/* $Id$ */
/* Copyright (c) 2007-2018 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS System libc */
/* 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 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 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. */
#include "ctype.h"
#include "strings.h"
/* ffs */
int ffs(int i)
{
const size_t bits = sizeof(i) * 8;
size_t j;
for(j = 0; j < bits; j++)
if((i << (bits - j - 1)) != 0)
return j;
return 0;
}
/* strcasecmp */
int strcasecmp(char const * s1, char const * s2)
{
unsigned char const * u1;
unsigned char const * u2;
u1 = (unsigned char const *)s1;
u2 = (unsigned char const *)s2;
while(*u1 && *u2 && tolower(*u1) == tolower(*u2))
{
u1++;
u2++;
}
return *u1 - *u2;
}
/* strncasecmp */
int strncasecmp(char const * s1, char const * s2, size_t n)
{
unsigned char const * u1;
unsigned char const * u2;
u1 = (unsigned char const *)s1;
u2 = (unsigned char const *)s2;
while(--n && *u1 && *u2 && tolower(*u1) == tolower(*u2))
{
u1++;
u2++;
}
return *u1 - *u2;
}