libexec/rtld-aout/support.c

   1 /*
   2  * Generic "support" routines to replace those obtained from libiberty for ld.
   3  *
   4  * I've collected these from random bits of (published) code I've written
   5  * over the years, not that they are a big deal.  peter@freebsd.org
   6  *-
   7  * Copyright (C) 1996
   8  *      Peter Wemm.  All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *-
  31  * $FreeBSD$
  32  */
  33 #include <sys/types.h>
  34 #include <string.h>
  35 #include <stdlib.h>
  36 #include <err.h>
  37
  38 #include "support.h"
  39
  40 char *
  41 concat(s1, s2, s3)
  42         const char *s1, *s2, *s3;
  43 {
  44         int len = 1;
  45         char *s;
  46         if (s1)
  47                 len += strlen(s1);
  48         if (s2)
  49                 len += strlen(s2);
  50         if (s3)
  51                 len += strlen(s3);
  52         s = xmalloc(len);
  53         s[0] = '\0';
  54         if (s1)
  55                 strcat(s, s1);
  56         if (s2)
  57                 strcat(s, s2);
  58         if (s3)
  59                 strcat(s, s3);
  60         return s;
  61 }
  62
  63 void *
  64 xmalloc(n)
  65         size_t n;
  66 {
  67         char *p = malloc(n);
  68
  69         if (p == NULL)
  70                 errx(1, "Could not allocate memory");
  71
  72         return p;
  73 }
  74
  75 void *
  76 xrealloc(p, n)
  77         void *p;
  78         size_t n;
  79 {
  80         p = realloc(p, n);
  81
  82         if (p == NULL)
  83                 errx(1, "Could not allocate memory");
  84
  85         return p;
  86 }