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
|
/* Copyright (C) 1991-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <setjmp.h>
#include <stdlib.h>
static jmp_buf env;
static int last_value = -1, lose = 0;
static void
jump (int val)
{
longjmp (env, val);
}
int
main (void)
{
int value;
value = setjmp (env);
if (value != last_value + 1)
{
fputs("Shouldn't have ", stdout);
lose = 1;
}
last_value = value;
switch (value)
{
case 0:
puts("Saved environment.");
jump (0);
default:
printf ("Jumped to %d.\n", value);
if (value < 10)
jump (value + 1);
}
if (!lose && value == 10)
{
/* Do a second test, this time without `setjmp' being a macro.
This is not required by ISO C but we have this for compatibility. */
#undef setjmp
extern int setjmp (jmp_buf);
last_value = -1;
lose = 0;
value = setjmp (env);
if (value != last_value + 1)
{
fputs("Shouldn't have ", stdout);
lose = 1;
}
last_value = value;
switch (value)
{
case 0:
puts("Saved environment.");
jump (0);
default:
printf ("Jumped to %d.\n", value);
if (value < 10)
jump (value + 1);
}
}
if (!lose && value == 10)
{
/* And again for the `_setjmp' function. */
#ifndef _setjmp
extern int _setjmp (jmp_buf);
#endif
last_value = -1;
lose = 0;
value = _setjmp (env);
if (value != last_value + 1)
{
fputs("Shouldn't have ", stdout);
lose = 1;
}
last_value = value;
switch (value)
{
case 0:
puts("Saved environment.");
jump (0);
default:
printf ("Jumped to %d.\n", value);
if (value < 10)
jump (value + 1);
}
}
if (lose || value != 10)
puts ("Test FAILED!");
else
puts ("Test succeeded!");
return lose ? EXIT_FAILURE : EXIT_SUCCESS;
}
|
GitWeb