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/* nbdkit
* Copyright (C) 2013-2020 Red Hat Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of Red Hat 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 RED HAT 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 RED HAT 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.
*/
/* Case insensitive string comparison functions (like strcasecmp,
* strncasecmp) which work correctly in any locale. They can only be
* used for comparison when one or both strings is 7 bit ASCII.
*/
#ifndef NBDKIT_ASCII_STRING_H
#define NBDKIT_ASCII_STRING_H
#include "ascii-ctype.h"
static inline int
ascii_strcasecmp (const char *s1, const char *s2)
{
const unsigned char *us1 = (const unsigned char *)s1;
const unsigned char *us2 = (const unsigned char *)s2;
while (ascii_tolower (*us1) == ascii_tolower (*us2)) {
if (*us1++ == '\0')
return 0;
us2++;
}
return ascii_tolower (*us1) - ascii_tolower (*us2);
}
static inline int
ascii_strncasecmp (const char *s1, const char *s2, size_t n)
{
if (n != 0) {
const unsigned char *us1 = (const unsigned char *)s1;
const unsigned char *us2 = (const unsigned char *)s2;
do {
if (ascii_tolower (*us1) != ascii_tolower (*us2))
return ascii_tolower (*us1) - ascii_tolower (*us2);
if (*us1++ == '\0')
break;
us2++;
} while (--n != 0);
}
return 0;
}
#endif /* NBDKIT_ASCII_STRING_H */
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