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d26e3629 KY |
1 | /* Shared general utility routines for GDB, the GNU debugger. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 1986-2014 Free Software Foundation, Inc. |
d26e3629 KY |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
727605ca | 20 | #include "common-defs.h" |
d26e3629 | 21 | |
d26e3629 KY |
22 | /* The xmalloc() (libiberty.h) family of memory management routines. |
23 | ||
24 | These are like the ISO-C malloc() family except that they implement | |
25 | consistent semantics and guard against typical memory management | |
26 | problems. */ | |
27 | ||
28 | /* NOTE: These are declared using PTR to ensure consistency with | |
29 | "libiberty.h". xfree() is GDB local. */ | |
30 | ||
31 | PTR /* ARI: PTR */ | |
32 | xmalloc (size_t size) | |
33 | { | |
34 | void *val; | |
35 | ||
36 | /* See libiberty/xmalloc.c. This function need's to match that's | |
37 | semantics. It never returns NULL. */ | |
38 | if (size == 0) | |
39 | size = 1; | |
40 | ||
41 | val = malloc (size); /* ARI: malloc */ | |
42 | if (val == NULL) | |
43 | malloc_failure (size); | |
44 | ||
45 | return val; | |
46 | } | |
47 | ||
48 | PTR /* ARI: PTR */ | |
49 | xrealloc (PTR ptr, size_t size) /* ARI: PTR */ | |
50 | { | |
51 | void *val; | |
52 | ||
53 | /* See libiberty/xmalloc.c. This function need's to match that's | |
54 | semantics. It never returns NULL. */ | |
55 | if (size == 0) | |
56 | size = 1; | |
57 | ||
58 | if (ptr != NULL) | |
59 | val = realloc (ptr, size); /* ARI: realloc */ | |
60 | else | |
61 | val = malloc (size); /* ARI: malloc */ | |
62 | if (val == NULL) | |
63 | malloc_failure (size); | |
64 | ||
65 | return val; | |
66 | } | |
67 | ||
68 | PTR /* ARI: PTR */ | |
69 | xcalloc (size_t number, size_t size) | |
70 | { | |
71 | void *mem; | |
72 | ||
73 | /* See libiberty/xmalloc.c. This function need's to match that's | |
74 | semantics. It never returns NULL. */ | |
75 | if (number == 0 || size == 0) | |
76 | { | |
77 | number = 1; | |
78 | size = 1; | |
79 | } | |
80 | ||
81 | mem = calloc (number, size); /* ARI: xcalloc */ | |
82 | if (mem == NULL) | |
83 | malloc_failure (number * size); | |
84 | ||
85 | return mem; | |
86 | } | |
87 | ||
88 | void * | |
89 | xzalloc (size_t size) | |
90 | { | |
91 | return xcalloc (1, size); | |
92 | } | |
93 | ||
94 | void | |
95 | xfree (void *ptr) | |
96 | { | |
97 | if (ptr != NULL) | |
98 | free (ptr); /* ARI: free */ | |
99 | } | |
100 | ||
101 | /* Like asprintf/vasprintf but get an internal_error if the call | |
102 | fails. */ | |
103 | ||
104 | char * | |
105 | xstrprintf (const char *format, ...) | |
106 | { | |
107 | char *ret; | |
108 | va_list args; | |
109 | ||
110 | va_start (args, format); | |
111 | ret = xstrvprintf (format, args); | |
112 | va_end (args); | |
113 | return ret; | |
114 | } | |
115 | ||
116 | char * | |
117 | xstrvprintf (const char *format, va_list ap) | |
118 | { | |
119 | char *ret = NULL; | |
120 | int status = vasprintf (&ret, format, ap); | |
121 | ||
122 | /* NULL is returned when there was a memory allocation problem, or | |
123 | any other error (for instance, a bad format string). A negative | |
124 | status (the printed length) with a non-NULL buffer should never | |
125 | happen, but just to be sure. */ | |
126 | if (ret == NULL || status < 0) | |
127 | internal_error (__FILE__, __LINE__, _("vasprintf call failed")); | |
128 | return ret; | |
129 | } | |
130 | ||
d26e3629 KY |
131 | int |
132 | xsnprintf (char *str, size_t size, const char *format, ...) | |
133 | { | |
134 | va_list args; | |
135 | int ret; | |
136 | ||
137 | va_start (args, format); | |
138 | ret = vsnprintf (str, size, format, args); | |
139 | gdb_assert (ret < size); | |
140 | va_end (args); | |
141 | ||
142 | return ret; | |
143 | } | |
baea0dae PA |
144 | |
145 | char * | |
146 | savestring (const char *ptr, size_t len) | |
147 | { | |
148 | char *p = (char *) xmalloc (len + 1); | |
149 | ||
150 | memcpy (p, ptr, len); | |
151 | p[len] = 0; | |
152 | return p; | |
153 | } |