1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/* xmalloc.c -- safe versions of malloc and realloc */
/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of GNU Readline, a library for reading lines
of text with interactive input and history editing.
Readline is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 1, or (at your option) any
later version.
Readline is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with Readline; see the file COPYING. If not, write to the Free
Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#if defined (HAVE_CONFIG_H)
#include <config.h>
#endif
#include "bashtypes.h"
#include <stdio.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#if defined (HAVE_STDLIB_H)
# include <stdlib.h>
#else
# include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */
#include "error.h"
#if !defined (PTR_T)
# if defined (__STDC__)
# define PTR_T void *
# else
# define PTR_T char *
# endif /* !__STDC__ */
#endif /* !PTR_T */
#if defined (HAVE_SBRK) && !defined (SBRK_DECLARED)
extern char *sbrk();
#endif
static PTR_T lbreak;
static int brkfound;
static size_t allocated;
/* **************************************************************** */
/* */
/* Memory Allocation and Deallocation. */
/* */
/* **************************************************************** */
#if defined (HAVE_SBRK)
static size_t
findbrk ()
{
if (brkfound == 0)
{
lbreak = (PTR_T)sbrk (0);
brkfound++;
}
return (char *)sbrk (0) - (char *)lbreak;
}
#endif
/* Return a pointer to free()able block of memory large enough
to hold BYTES number of bytes. If the memory cannot be allocated,
print an error message and abort. */
char *
xmalloc (bytes)
size_t bytes;
{
char *temp;
temp = (char *)malloc (bytes);
if (temp == 0)
{
#if defined (HAVE_SBRK)
allocated = findbrk ();
fatal_error ("xmalloc: cannot allocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
#else
fatal_error ("xmalloc: cannot allocate %lu bytes", (unsigned long)bytes);
#endif /* !HAVE_SBRK */
}
return (temp);
}
char *
xrealloc (pointer, bytes)
PTR_T pointer;
size_t bytes;
{
char *temp;
temp = pointer ? (char *)realloc (pointer, bytes) : (char *)malloc (bytes);
if (temp == 0)
{
#if defined (HAVE_SBRK)
allocated = findbrk ();
fatal_error ("xrealloc: cannot reallocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
#else
fatal_error ("xmalloc: cannot allocate %lu bytes", (unsigned long)bytes);
#endif /* !HAVE_SBRK */
}
return (temp);
}
/* Use this as the function to call when adding unwind protects so we
don't need to know what free() returns. */
void
xfree (string)
char *string;
{
if (string)
free (string);
}
|