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[glibc/history.git] / setjmp / tst-setjmp.c
blob35d9638ad8938e2988723b273717e2fea94576d0
1 /* Copyright (C) 1991, 1992, 1997, 1998, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <stdio.h>
20 #include <setjmp.h>
21 #include <stdlib.h>
23 static jmp_buf env;
24 static int last_value = -1, lose = 0;
26 static void
27 jump (int val)
29 longjmp (env, val);
32 int
33 main (void)
35 int value;
37 value = setjmp (env);
38 if (value != last_value + 1)
40 fputs("Shouldn't have ", stdout);
41 lose = 1;
43 last_value = value;
44 switch (value)
46 case 0:
47 puts("Saved environment.");
48 jump (0);
49 default:
50 printf ("Jumped to %d.\n", value);
51 if (value < 10)
52 jump (value + 1);
55 if (!lose && value == 10)
57 /* Do a second test, this time without `setjmp' being a macro.
58 This is not required by ISO C but we have this for compatibility. */
59 #undef setjmp
60 extern int setjmp (jmp_buf);
62 last_value = -1;
63 lose = 0;
65 value = setjmp (env);
66 if (value != last_value + 1)
68 fputs("Shouldn't have ", stdout);
69 lose = 1;
71 last_value = value;
72 switch (value)
74 case 0:
75 puts("Saved environment.");
76 jump (0);
77 default:
78 printf ("Jumped to %d.\n", value);
79 if (value < 10)
80 jump (value + 1);
84 if (!lose && value == 10)
86 /* And again for the `_setjmp' function. */
87 #ifndef _setjmp
88 extern int _setjmp (jmp_buf);
89 #endif
90 last_value = -1;
91 lose = 0;
93 value = _setjmp (env);
94 if (value != last_value + 1)
96 fputs("Shouldn't have ", stdout);
97 lose = 1;
99 last_value = value;
100 switch (value)
102 case 0:
103 puts("Saved environment.");
104 jump (0);
105 default:
106 printf ("Jumped to %d.\n", value);
107 if (value < 10)
108 jump (value + 1);
112 if (lose || value != 10)
113 puts ("Test FAILED!");
114 else
115 puts ("Test succeeded!");
117 return lose ? EXIT_FAILURE : EXIT_SUCCESS;