1 /* common.h - Common functions
3 Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
4 Copyright (C) 2008-2014 Daniel Baumann <mail@daniel-baumann.ch>
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 The complete text of the GNU General Public License
20 can be found in /usr/share/common-licenses/GPL-3 file.
26 void die(const char *msg, ...)
27 __attribute((noreturn, format(printf, 1, 2)));
29 /* Displays a prinf-style message and terminates the program. */
31 void pdie(const char *msg, ...)
32 __attribute((noreturn, format(printf, 1, 2)));
34 /* Like die, but appends an error message according to the state of errno. */
36 void *alloc(int size);
38 /* mallocs SIZE bytes and returns a pointer to the data. Terminates the program
41 void *qalloc(void **root, int size);
43 /* Like alloc, but registers the data area in a list described by ROOT. */
45 void qfree(void **root);
47 /* Deallocates all qalloc'ed data areas described by ROOT. */
49 int min(int a, int b);
51 /* Returns the smaller integer value of a and b. */
53 char get_key(const char *valid, const char *prompt);
55 /* Displays PROMPT and waits for user input. Only characters in VALID are
56 accepted. Terminates the program on EOF. Returns the character. */