1 /*
2  *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3  *
4  *  Copyright (c) 1997-2021 ircd-hybrid development team
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to the Free Software
18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19  *  USA
20  */
21 
22 /*! \file memory.c
23  * \brief Memory utilities.
24  * \version $Id: memory.c 9858 2021-01-01 04:43:42Z michael $
25  */
26 
27 #include "stdinc.h"
28 #include "irc_string.h"
29 #include "memory.h"
30 #include "restart.h"
31 
32 
33 /*
34  * xcalloc - allocate memory, call outofmemory on failure
35  */
36 void *
xcalloc(size_t size)37 xcalloc(size_t size)
38 {
39   void *ret = calloc(1, size);
40 
41   if (ret == NULL)
42     outofmemory();
43 
44   return ret;
45 }
46 
47 /*
48  * xrealloc - reallocate memory, call outofmemory on failure
49  */
50 void *
xrealloc(void * x,size_t y)51 xrealloc(void *x, size_t y)
52 {
53   void *ret = realloc(x, y);
54 
55   if (y && ret == NULL)
56     outofmemory();
57 
58   return ret;
59 }
60 
61 void
xfree(void * x)62 xfree(void *x)
63 {
64   free(x);
65 }
66 
67 void *
xstrdup(const char * s)68 xstrdup(const char *s)
69 {
70   void *ret = malloc(strlen(s) + 1);
71 
72   if (ret == NULL)
73     outofmemory();
74 
75   strcpy(ret, s);
76 
77   return ret;
78 }
79 
80 void *
xstrndup(const char * s,size_t len)81 xstrndup(const char *s, size_t len)
82 {
83   void *ret = malloc(len + 1);
84 
85   if (ret == NULL)
86     outofmemory();
87 
88   strlcpy(ret, s, len + 1);
89 
90   return ret;
91 }
92 
93 /* outofmemory()
94  *
95  * input        - NONE
96  * output       - NONE
97  * side effects - simply try to report there is a problem.
98  *                Abort if it was called more than once
99  */
100 void
outofmemory(void)101 outofmemory(void)
102 {
103   static bool was_here = false;
104 
105   if (was_here == false)
106     was_here = true;
107   else
108     abort();
109 
110   server_die("out of memory", true);
111 }
112