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1 | /* Shared general utility routines for GDB, the GNU debugger. |
2 | ||
3 | Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, | |
4 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, | |
5 | 2009, 2010, 2011 Free Software Foundation, Inc. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #ifdef GDBSERVER | |
23 | #include "server.h" | |
24 | #else | |
25 | #include "defs.h" | |
26 | #endif | |
27 | ||
28 | #include "gdb_assert.h" | |
29 | ||
30 | #include <stdlib.h> | |
31 | #include <stdio.h> | |
32 | ||
33 | /* The xmalloc() (libiberty.h) family of memory management routines. | |
34 | ||
35 | These are like the ISO-C malloc() family except that they implement | |
36 | consistent semantics and guard against typical memory management | |
37 | problems. */ | |
38 | ||
39 | /* NOTE: These are declared using PTR to ensure consistency with | |
40 | "libiberty.h". xfree() is GDB local. */ | |
41 | ||
42 | PTR /* ARI: PTR */ | |
43 | xmalloc (size_t size) | |
44 | { | |
45 | void *val; | |
46 | ||
47 | /* See libiberty/xmalloc.c. This function need's to match that's | |
48 | semantics. It never returns NULL. */ | |
49 | if (size == 0) | |
50 | size = 1; | |
51 | ||
52 | val = malloc (size); /* ARI: malloc */ | |
53 | if (val == NULL) | |
54 | malloc_failure (size); | |
55 | ||
56 | return val; | |
57 | } | |
58 | ||
59 | PTR /* ARI: PTR */ | |
60 | xrealloc (PTR ptr, size_t size) /* ARI: PTR */ | |
61 | { | |
62 | void *val; | |
63 | ||
64 | /* See libiberty/xmalloc.c. This function need's to match that's | |
65 | semantics. It never returns NULL. */ | |
66 | if (size == 0) | |
67 | size = 1; | |
68 | ||
69 | if (ptr != NULL) | |
70 | val = realloc (ptr, size); /* ARI: realloc */ | |
71 | else | |
72 | val = malloc (size); /* ARI: malloc */ | |
73 | if (val == NULL) | |
74 | malloc_failure (size); | |
75 | ||
76 | return val; | |
77 | } | |
78 | ||
79 | PTR /* ARI: PTR */ | |
80 | xcalloc (size_t number, size_t size) | |
81 | { | |
82 | void *mem; | |
83 | ||
84 | /* See libiberty/xmalloc.c. This function need's to match that's | |
85 | semantics. It never returns NULL. */ | |
86 | if (number == 0 || size == 0) | |
87 | { | |
88 | number = 1; | |
89 | size = 1; | |
90 | } | |
91 | ||
92 | mem = calloc (number, size); /* ARI: xcalloc */ | |
93 | if (mem == NULL) | |
94 | malloc_failure (number * size); | |
95 | ||
96 | return mem; | |
97 | } | |
98 | ||
99 | void * | |
100 | xzalloc (size_t size) | |
101 | { | |
102 | return xcalloc (1, size); | |
103 | } | |
104 | ||
105 | void | |
106 | xfree (void *ptr) | |
107 | { | |
108 | if (ptr != NULL) | |
109 | free (ptr); /* ARI: free */ | |
110 | } | |
111 | ||
112 | /* Like asprintf/vasprintf but get an internal_error if the call | |
113 | fails. */ | |
114 | ||
115 | char * | |
116 | xstrprintf (const char *format, ...) | |
117 | { | |
118 | char *ret; | |
119 | va_list args; | |
120 | ||
121 | va_start (args, format); | |
122 | ret = xstrvprintf (format, args); | |
123 | va_end (args); | |
124 | return ret; | |
125 | } | |
126 | ||
127 | char * | |
128 | xstrvprintf (const char *format, va_list ap) | |
129 | { | |
130 | char *ret = NULL; | |
131 | int status = vasprintf (&ret, format, ap); | |
132 | ||
133 | /* NULL is returned when there was a memory allocation problem, or | |
134 | any other error (for instance, a bad format string). A negative | |
135 | status (the printed length) with a non-NULL buffer should never | |
136 | happen, but just to be sure. */ | |
137 | if (ret == NULL || status < 0) | |
138 | internal_error (__FILE__, __LINE__, _("vasprintf call failed")); | |
139 | return ret; | |
140 | } | |
141 | ||
142 | void | |
143 | xasprintf (char **ret, const char *format, ...) | |
144 | { | |
145 | va_list args; | |
146 | ||
147 | va_start (args, format); | |
148 | (*ret) = xstrvprintf (format, args); | |
149 | va_end (args); | |
150 | } | |
151 | ||
152 | void | |
153 | xvasprintf (char **ret, const char *format, va_list ap) | |
154 | { | |
155 | (*ret) = xstrvprintf (format, ap); | |
156 | } | |
157 | ||
158 | int | |
159 | xsnprintf (char *str, size_t size, const char *format, ...) | |
160 | { | |
161 | va_list args; | |
162 | int ret; | |
163 | ||
164 | va_start (args, format); | |
165 | ret = vsnprintf (str, size, format, args); | |
166 | gdb_assert (ret < size); | |
167 | va_end (args); | |
168 | ||
169 | return ret; | |
170 | } |