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d26e3629 KY |
1 | /* Shared general utility routines for GDB, the GNU debugger. |
2 | ||
0b302171 | 3 | Copyright (C) 1986, 1988-2012 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 | ||
20 | #ifdef GDBSERVER | |
21 | #include "server.h" | |
22 | #else | |
23 | #include "defs.h" | |
24 | #endif | |
25 | ||
26 | #include "gdb_assert.h" | |
27 | ||
28 | #include <stdlib.h> | |
29 | #include <stdio.h> | |
30 | ||
31 | /* The xmalloc() (libiberty.h) family of memory management routines. | |
32 | ||
33 | These are like the ISO-C malloc() family except that they implement | |
34 | consistent semantics and guard against typical memory management | |
35 | problems. */ | |
36 | ||
37 | /* NOTE: These are declared using PTR to ensure consistency with | |
38 | "libiberty.h". xfree() is GDB local. */ | |
39 | ||
40 | PTR /* ARI: PTR */ | |
41 | xmalloc (size_t size) | |
42 | { | |
43 | void *val; | |
44 | ||
45 | /* See libiberty/xmalloc.c. This function need's to match that's | |
46 | semantics. It never returns NULL. */ | |
47 | if (size == 0) | |
48 | size = 1; | |
49 | ||
50 | val = malloc (size); /* ARI: malloc */ | |
51 | if (val == NULL) | |
52 | malloc_failure (size); | |
53 | ||
54 | return val; | |
55 | } | |
56 | ||
57 | PTR /* ARI: PTR */ | |
58 | xrealloc (PTR ptr, size_t size) /* ARI: PTR */ | |
59 | { | |
60 | void *val; | |
61 | ||
62 | /* See libiberty/xmalloc.c. This function need's to match that's | |
63 | semantics. It never returns NULL. */ | |
64 | if (size == 0) | |
65 | size = 1; | |
66 | ||
67 | if (ptr != NULL) | |
68 | val = realloc (ptr, size); /* ARI: realloc */ | |
69 | else | |
70 | val = malloc (size); /* ARI: malloc */ | |
71 | if (val == NULL) | |
72 | malloc_failure (size); | |
73 | ||
74 | return val; | |
75 | } | |
76 | ||
77 | PTR /* ARI: PTR */ | |
78 | xcalloc (size_t number, size_t size) | |
79 | { | |
80 | void *mem; | |
81 | ||
82 | /* See libiberty/xmalloc.c. This function need's to match that's | |
83 | semantics. It never returns NULL. */ | |
84 | if (number == 0 || size == 0) | |
85 | { | |
86 | number = 1; | |
87 | size = 1; | |
88 | } | |
89 | ||
90 | mem = calloc (number, size); /* ARI: xcalloc */ | |
91 | if (mem == NULL) | |
92 | malloc_failure (number * size); | |
93 | ||
94 | return mem; | |
95 | } | |
96 | ||
97 | void * | |
98 | xzalloc (size_t size) | |
99 | { | |
100 | return xcalloc (1, size); | |
101 | } | |
102 | ||
103 | void | |
104 | xfree (void *ptr) | |
105 | { | |
106 | if (ptr != NULL) | |
107 | free (ptr); /* ARI: free */ | |
108 | } | |
109 | ||
110 | /* Like asprintf/vasprintf but get an internal_error if the call | |
111 | fails. */ | |
112 | ||
113 | char * | |
114 | xstrprintf (const char *format, ...) | |
115 | { | |
116 | char *ret; | |
117 | va_list args; | |
118 | ||
119 | va_start (args, format); | |
120 | ret = xstrvprintf (format, args); | |
121 | va_end (args); | |
122 | return ret; | |
123 | } | |
124 | ||
125 | char * | |
126 | xstrvprintf (const char *format, va_list ap) | |
127 | { | |
128 | char *ret = NULL; | |
129 | int status = vasprintf (&ret, format, ap); | |
130 | ||
131 | /* NULL is returned when there was a memory allocation problem, or | |
132 | any other error (for instance, a bad format string). A negative | |
133 | status (the printed length) with a non-NULL buffer should never | |
134 | happen, but just to be sure. */ | |
135 | if (ret == NULL || status < 0) | |
136 | internal_error (__FILE__, __LINE__, _("vasprintf call failed")); | |
137 | return ret; | |
138 | } | |
139 | ||
d26e3629 KY |
140 | int |
141 | xsnprintf (char *str, size_t size, const char *format, ...) | |
142 | { | |
143 | va_list args; | |
144 | int ret; | |
145 | ||
146 | va_start (args, format); | |
147 | ret = vsnprintf (str, size, format, args); | |
148 | gdb_assert (ret < size); | |
149 | va_end (args); | |
150 | ||
151 | return ret; | |
152 | } |