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/*
* The functions in this file have completely been stolen
* from the Mutt mail user agent, with some slight
* modifications by Thomas Roessler <roessler@guug.de> to
* use them in the "little brother database".
*
* The following copyright notice applies:
*
* Copyright (C) 1996-8 Michael R. Elkins <me@cs.hmc.edu>
*
* This program is free software; you can
* redistribute it and/or modify it under the terms
* of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of
* the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "helpers.h"
void *safe_calloc (size_t nmemb, size_t size)
{
void *p;
if (!nmemb || !size)
return NULL;
if (!(p = calloc (nmemb, size)))
{
perror ("Out of memory");
sleep (1);
exit (1);
}
return p;
}
void *safe_malloc (unsigned int siz)
{
void *p;
if (siz == 0)
return 0;
if ((p = (void *) malloc (siz)) == 0)
{
perror ("Out of memory!");
sleep (1);
exit (1);
}
return (p);
}
void safe_realloc (void **p, size_t siz)
{
void *r;
if (siz == 0)
{
if (*p)
{
free (*p);
*p = NULL;
}
return;
}
if (*p)
r = (void *) realloc (*p, siz);
else
{
/* realloc(NULL, nbytes) doesn't seem to work under SunOS 4.1.x */
r = (void *) malloc (siz);
}
if (!r)
{
perror ("Out of memory!");
sleep (1);
exit (1);
}
*p = r;
}
void safe_free (void *ptr)
{
void **p = (void **)ptr;
if (*p)
{
free (*p);
*p = 0;
}
}
char *safe_strdup (const char *s)
{
char *p;
size_t l;
if (!s || !*s) return 0;
l = strlen (s) + 1;
p = (char *)safe_malloc (l);
memcpy (p, s, l);
return (p);
}
size_t safe_strlen(const char *a)
{
return a ? strlen (a) : 0;
}
int safe_strcmp(const char *a, const char *b)
{
return strcmp(NONULL(a), NONULL(b));
}
static inline int ascii_isupper (int c)
{
return (c >= 'A') && (c <= 'Z');
}
static inline int ascii_tolower (int c)
{
if (ascii_isupper (c))
return c | 32;
return c;
}
int ascii_strcasecmp (const char *a, const char *b)
{
int i;
if (a == b)
return 0;
if (a == NULL && b)
return -1;
if (b == NULL && a)
return 1;
for (;; a++, b++)
{
if ((i = ascii_tolower (*a) - ascii_tolower (*b)))
return i;
/* test for NUL here rather that in the for loop in order to detect unqual
* length strings (see http://dev.mutt.org/trac/ticket/3601)
*/
if (!*a)
break;
}
return 0;
}
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