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strutil.c
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strutil.c
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/*
* GZX - George's ZX Spectrum Emulator
* String utility functions
*
* Copyright (c) 1999-2018 Jiri Svoboda
* All rights reserved.
*
* 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <stdlib.h>
#include <string.h>
#include "strutil.h"
/** Case-insensitive strcmp.
*
* @param a First string
* @param b Second string
* @return Less than zero, zero, greater than zero, if a < b, a == b, a > b,
* respectively.
*/
int strcmpci(const char *a, const char *b)
{
while (*a && *b && tolower(*a) == tolower(*b)) {
a++;
b++;
}
return tolower(*a) - tolower(*b);
}
/** Duplicate string.
*
* @param s String
* @return Copy of string or @c NULL if out of memory
*/
char *strdupl(const char *s)
{
char *ns;
size_t len;
len = strlen(s);
ns = malloc(len + 1);
if (ns == NULL)
return NULL;
memcpy(ns, s, len + 1);
return ns;
}