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mem.c revision 1.20 
      1 /*	$NetBSD: mem.c,v 1.20 2022/05/20 21:18:54 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)
     40 __RCSID("$NetBSD: mem.c,v 1.20 2022/05/20 21:18:54 rillig Exp $");
     41 #endif
     42 
     43 #include <stdarg.h>
     44 #include <stdlib.h>
     45 #include <string.h>
     46 #include <unistd.h>
     47 
     48 #include "lint.h"
     49 
     50 #if defined(IS_LINT1) || defined(IS_LINT2)
     51 size_t
     52 mem_block_size(void)
     53 {
     54 	unsigned int pagesize;
     55 
     56 	pagesize = (unsigned int)getpagesize();
     57 	return (MBLKSIZ + pagesize - 1) / pagesize * pagesize;
     58 }
     59 #endif
     60 
     61 static void *
     62 not_null(void *ptr)
     63 {
     64 
     65 	if (ptr == NULL)
     66 		errx(1, "virtual memory exhausted");
     67 	return ptr;
     68 }
     69 
     70 void *
     71 xmalloc(size_t s)
     72 {
     73 
     74 	return not_null(malloc(s));
     75 }
     76 
     77 void *
     78 xcalloc(size_t n, size_t s)
     79 {
     80 
     81 	return not_null(calloc(n, s));
     82 }
     83 
     84 void *
     85 xrealloc(void *p, size_t s)
     86 {
     87 
     88 	return not_null(realloc(p, s));
     89 }
     90 
     91 char *
     92 xstrdup(const char *s)
     93 {
     94 
     95 	return not_null(strdup(s));
     96 }
     97 
     98 #if defined(IS_XLINT)
     99 char *
    100 xasprintf(const char *fmt, ...)
    101 {
    102 	char *str;
    103 	int e;
    104 	va_list ap;
    105 
    106 	va_start(ap, fmt);
    107 	e = vasprintf(&str, fmt, ap);
    108 	va_end(ap);
    109 	if (e < 0)
    110 		(void)not_null(NULL);
    111 	return str;
    112 }
    113 #endif
    114