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., 51 Franklin Street - Fifth Floor,
18 Boston, MA 02110-1301, USA. */
19
20 /*
21
22 @deftypefn Replacement void* xmalloc (size_t)
23
24 Allocate memory without fail. If @code{malloc} fails, this will print
25 a message to @code{stderr} (using the name set by
26 @code{xmalloc_set_program_name},
27 if any) and then call @code{xexit}. Note that it is therefore safe for
28 a program to contain @code{#define malloc xmalloc} in its source.
29
30 @end deftypefn
31
32 @deftypefn Replacement void* xrealloc (void *@var{ptr}, size_t @var{size})
33 Reallocate memory without fail. This routine functions like @code{realloc},
34 but will behave the same as @code{xmalloc} if memory cannot be found.
35
36 @end deftypefn
37
38 @deftypefn Replacement void* xcalloc (size_t @var{nelem}, size_t @var{elsize})
39
40 Allocate memory without fail, and set it to zero. This routine functions
41 like @code{calloc}, but will behave the same as @code{xmalloc} if memory
42 cannot be found.
43
44 @end deftypefn
45
46 @deftypefn Replacement void xmalloc_set_program_name (const char *@var{name})
47
48 You can use this to set the name of the program used by
49 @code{xmalloc_failed} when printing a failure message.
50
51 @end deftypefn
52
53 @deftypefn Replacement void xmalloc_failed (size_t)
54
55 This function is not meant to be called by client code, and is listed
56 here for completeness only. If any of the allocation routines fail, this
57 function will be called to print an error message and terminate execution.
58
59 @end deftypefn
60
61 */
62
63 #ifdef HAVE_CONFIG_H
64 #include "config.h"
65 #endif
66 #include "ansidecl.h"
67 #include "libiberty.h"
68
69 #include <stdio.h>
70
71 #include <stddef.h>
72
73 #if VMS
74 #include <stdlib.h>
75 #include <unixlib.h>
76 #else
77 /* For systems with larger pointers than ints, these must be declared. */
78 # if HAVE_STDLIB_H && HAVE_UNISTD_H && HAVE_DECL_MALLOC \
79 && HAVE_DECL_REALLOC && HAVE_DECL_CALLOC && HAVE_DECL_SBRK
80 # include <stdlib.h>
81 # include <unistd.h>
82 # else
83 # ifdef __cplusplus
84 extern "C" {
85 # endif /* __cplusplus */
86 void *malloc (size_t);
87 void *realloc (void *, size_t);
88 void *calloc (size_t, size_t);
89 void *sbrk (ptrdiff_t);
90 # ifdef __cplusplus
91 }
92 # endif /* __cplusplus */
93 # endif /* HAVE_STDLIB_H ... */
94 #endif /* VMS */
95
96 /* The program name if set. */
97 static const char *name = "";
98
99 void
xmalloc_set_program_name(const char * s)100 xmalloc_set_program_name (const char *s)
101 {
102 name = s;
103 }
104
105 void
xmalloc_failed(size_t size)106 xmalloc_failed (size_t size)
107 {
108 fprintf (stderr,
109 "\n%s%sout of memory allocating %lu bytes\n",
110 name, *name ? ": " : "",
111 (unsigned long) size);
112 xexit (1);
113 }
114
115 PTR
xmalloc(size_t size)116 xmalloc (size_t size)
117 {
118 PTR newmem;
119
120 if (size == 0)
121 size = 1;
122 newmem = malloc (size);
123 if (!newmem)
124 xmalloc_failed (size);
125
126 return (newmem);
127 }
128
129 PTR
xcalloc(size_t nelem,size_t elsize)130 xcalloc (size_t nelem, size_t elsize)
131 {
132 PTR newmem;
133
134 if (nelem == 0 || elsize == 0)
135 nelem = elsize = 1;
136
137 newmem = calloc (nelem, elsize);
138 if (!newmem)
139 xmalloc_failed (nelem * elsize);
140
141 return (newmem);
142 }
143
144 PTR
xrealloc(PTR oldmem,size_t size)145 xrealloc (PTR oldmem, size_t size)
146 {
147 PTR newmem;
148
149 if (size == 0)
150 size = 1;
151 if (!oldmem)
152 newmem = malloc (size);
153 else
154 newmem = realloc (oldmem, size);
155 if (!newmem)
156 xmalloc_failed (size);
157
158 return (newmem);
159 }
160