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Diffstat (limited to 'REORG.TODO/manual/examples/setjmp.c')
-rw-r--r-- | REORG.TODO/manual/examples/setjmp.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/REORG.TODO/manual/examples/setjmp.c b/REORG.TODO/manual/examples/setjmp.c new file mode 100644 index 0000000000..20b5064914 --- /dev/null +++ b/REORG.TODO/manual/examples/setjmp.c @@ -0,0 +1,49 @@ +/* Introduction to Non-Local Exits + Copyright (C) 1991-2017 Free Software Foundation, Inc. + + This program 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 2 + of the License, or (at your option) any later version. + + This program 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 this program; if not, if not, see <http://www.gnu.org/licenses/>. +*/ + +#include <setjmp.h> +#include <stdlib.h> +#include <stdio.h> + +jmp_buf main_loop; + +void +abort_to_main_loop (int status) +{ + longjmp (main_loop, status); +} + +int +main (void) +{ + while (1) + if (setjmp (main_loop)) + puts ("Back at main loop...."); + else + do_command (); +} + + +void +do_command (void) +{ + char buffer[128]; + if (fgets (buffer, 128, stdin) == NULL) + abort_to_main_loop (-1); + else + exit (EXIT_SUCCESS); +} |