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glibc/setjmp/tst-setjmp.c
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/* Copyright (C) 1991-2016 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); | |
} | |
static int | |
do_test (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; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |