libiberty/xmalloc.c

   1 /* memory allocation routines with error checking.
   2    Copyright 1989, 90, 91, 92, 93, 94 Free Software Foundation, Inc.
   3
   4 This file is part of the libiberty library.
   5 Libiberty is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Library General Public
   7 License as published by the Free Software Foundation; either
   8 version 2 of the License, or (at your option) any later version.
   9
  10 Libiberty is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with libiberty; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23 #include "ansidecl.h"
  24 #include "libiberty.h"
  25
  26 #include <stdio.h>
  27
  28 #ifdef __STDC__
  29 #include <stddef.h>
  30 #else
  31 #define size_t unsigned long
  32 #define ptrdiff_t long
  33 #endif
  34
  35 #if VMS
  36 #include <stdlib.h>
  37 #include <unixlib.h>
  38 #else
  39 /* For systems with larger pointers than ints, these must be declared.  */
  40 PTR malloc PARAMS ((size_t));
  41 PTR realloc PARAMS ((PTR, size_t));
  42 PTR calloc PARAMS ((size_t, size_t));
  43 PTR sbrk PARAMS ((ptrdiff_t));
  44 #endif
  45
  46 /* The program name if set.  */
  47 static const char *name = "";
  48
  49 #ifdef HAVE_SBRK
  50 /* The initial sbrk, set when the program name is set. Not used for win32
  51    ports other than cygwin32.  */
  52 static char *first_break = NULL;
  53 #endif /* HAVE_SBRK */
  54
  55 void
  56 xmalloc_set_program_name (s)
  57      const char *s;
  58 {
  59   name = s;
  60 #ifdef HAVE_SBRK
  61   /* Win32 ports other than cygwin32 don't have brk() */
  62   if (first_break == NULL)
  63     first_break = (char *) sbrk (0);
  64 #endif /* HAVE_SBRK */
  65 }
  66
  67 PTR
  68 xmalloc (size)
  69     size_t size;
  70 {
  71   PTR newmem;
  72
  73   if (size == 0)
  74     size = 1;
  75   newmem = malloc (size);
  76   if (!newmem)
  77     {
  78 #ifdef HAVE_SBRK
  79       extern char **environ;
  80       size_t allocated;
  81
  82       if (first_break != NULL)
  83         allocated = (char *) sbrk (0) - first_break;
  84       else
  85         allocated = (char *) sbrk (0) - (char *) &environ;
  86       fprintf (stderr,
  87                "\n%s%sCannot allocate %lu bytes after allocating %lu bytes\n",
  88                name, *name ? ": " : "",
  89                (unsigned long) size, (unsigned long) allocated);
  90 #else /* HAVE_SBRK */
  91       fprintf (stderr,
  92               "\n%s%sCannot allocate %lu bytes\n",
  93               name, *name ? ": " : "",
  94               (unsigned long) size);
  95 #endif /* HAVE_SBRK */
  96       xexit (1);
  97     }
  98   return (newmem);
  99 }
 100
 101 PTR
 102 xcalloc (nelem, elsize)
 103   size_t nelem, elsize;
 104 {
 105   PTR newmem;
 106
 107   if (nelem == 0 || elsize == 0)
 108     nelem = elsize = 1;
 109
 110   newmem = calloc (nelem, elsize);
 111   if (!newmem)
 112     {
 113 #ifdef HAVE_SBRK
 114       extern char **environ;
 115       size_t allocated;
 116
 117       if (first_break != NULL)
 118         allocated = (char *) sbrk (0) - first_break;
 119       else
 120         allocated = (char *) sbrk (0) - (char *) &environ;
 121       fprintf (stderr,
 122                "\n%s%sCannot allocate %lu bytes after allocating %lu bytes\n",
 123                name, *name ? ": " : "",
 124                (unsigned long) (nelem * elsize), (unsigned long) allocated);
 125 #else /* HAVE_SBRK */
 126       fprintf (stderr,
 127               "\n%s%sCannot allocate %lu bytes\n",
 128               name, *name ? ": " : "",
 129               (unsigned long) (nelem * elsize));
 130 #endif /* HAVE_SBRK */
 131       xexit (1);
 132     }
 133   return (newmem);
 134 }
 135
 136 PTR
 137 xrealloc (oldmem, size)
 138     PTR oldmem;
 139     size_t size;
 140 {
 141   PTR newmem;
 142
 143   if (size == 0)
 144     size = 1;
 145   if (!oldmem)
 146     newmem = malloc (size);
 147   else
 148     newmem = realloc (oldmem, size);
 149   if (!newmem)
 150     {
 151 #ifdef HAVE_SBRK
 152       extern char **environ;
 153       size_t allocated;
 154
 155       if (first_break != NULL)
 156         allocated = (char *) sbrk (0) - first_break;
 157       else
 158         allocated = (char *) sbrk (0) - (char *) &environ;
 159       fprintf (stderr,
 160                "\n%s%sCannot reallocate %lu bytes after allocating %lu bytes\n",
 161                name, *name ? ": " : "",
 162                (unsigned long) size, (unsigned long) allocated);
 163 #else /* HAVE_SBRK */
 164       fprintf (stderr,
 165               "\n%s%sCannot reallocate %lu bytes\n",
 166               name, *name ? ": " : "",
 167               (unsigned long) size);
 168 #endif /* HAVE_SBRK */
 169       xexit (1);
 170     }
 171   return (newmem);
 172 }