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[glibc.git] / assert / assert.c
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1 /* Copyright (C) 1991, 1994, 1995, 1996, 1998 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 Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <assert.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <sysdep.h>
23 #include <libintl.h>
26 const char *__assert_program_name;
28 #ifdef USE_IN_LIBIO
29 # include <libio/iolibio.h>
30 # define fflush(s) _IO_fflush (s)
31 #endif
33 /* This function, when passed a string containing an asserted
34 expression, a filename, and a line number, prints a message
35 on the standard error stream of the form:
36 a.c:10: foobar: Assertion `a == b' failed.
37 It then aborts program execution via a call to `abort'. */
39 #ifdef FATAL_PREPARE_INCLUDE
40 # include FATAL_PREPARE_INCLUDE
41 #endif
43 void
44 __assert_fail (const char *assertion, const char *file, unsigned int line,
45 const char *function)
47 #ifdef FATAL_PREPARE
48 FATAL_PREPARE;
49 #endif
51 /* Print the message. */
52 (void) fprintf (stderr, _("%s%s%s:%u: %s%sAssertion `%s' failed.\n"),
53 __assert_program_name ? __assert_program_name : "",
54 __assert_program_name ? ": " : "",
55 file, line,
56 function ? function : "", function ? ": " : "",
57 assertion);
58 (void) fflush (stderr);
60 abort ();
63 #ifdef HAVE_GNU_LD
65 #include <string.h>
67 static void
68 set_progname (int argc, char **argv, char **envp)
70 char *p;
72 if (argv && argv[0])
74 p = strrchr (argv[0], '/');
75 if (p == NULL)
76 __assert_program_name = argv[0];
77 else
78 __assert_program_name = p + 1;
81 (void) &set_progname; /* Avoid "defined but not used" warning. */
84 text_set_element (__libc_subinit, set_progname);
86 #endif