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mem.c revision 1.15 
      1 /*	$NetBSD: mem.c,v 1.15 2021/08/01 18:13:53 rillig Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994, 1995 Jochen Pohl
      5  * All Rights Reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Jochen Pohl for
     18  *	The NetBSD Project.
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #if HAVE_NBTOOL_CONFIG_H
     35 #include "nbtool_config.h"
     36 #endif
     37 
     38 #include <sys/cdefs.h>
     39 #if defined(__RCSID) && !defined(lint)
     40 __RCSID("$NetBSD: mem.c,v 1.15 2021/08/01 18:13:53 rillig Exp $");
     41 #endif
     42 
     43 #include <stdarg.h>
     44 #include <stdlib.h>
     45 #include <string.h>
     46 
     47 #include "lint.h"
     48 
     49 static void __attribute__((noreturn))
     50 nomem(void)
     51 {
     52 
     53 	errx(1, "virtual memory exhausted");
     54 }
     55 
     56 void *
     57 xmalloc(size_t s)
     58 {
     59 	void	*p;
     60 
     61 	if ((p = malloc(s)) == NULL)
     62 		nomem();
     63 	return p;
     64 }
     65 
     66 void *
     67 xcalloc(size_t n, size_t s)
     68 {
     69 	void	*p;
     70 
     71 	if ((p = calloc(n, s)) == NULL)
     72 		nomem();
     73 	return p;
     74 }
     75 
     76 void *
     77 xrealloc(void *p, size_t s)
     78 {
     79 	void *n;
     80 
     81 	if ((n = realloc(p, s)) == NULL) {
     82 		free(p);
     83 		nomem();
     84 	}
     85 	return n;
     86 }
     87 
     88 char *
     89 xstrdup(const char *s)
     90 {
     91 	char	*s2;
     92 
     93 	if ((s2 = strdup(s)) == NULL)
     94 		nomem();
     95 	return s2;
     96 }
     97 
     98 char *
     99 xasprintf(const char *fmt, ...)
    100 {
    101 	char *str;
    102 	int e;
    103 	va_list ap;
    104 
    105 	va_start(ap, fmt);
    106 	e = vasprintf(&str, fmt, ap);
    107 	va_end(ap);
    108 	if (e < 0)
    109 		nomem();
    110 	return str;
    111 }
    112