glibc/assert/assert.c

/* Copyright (C) 1991, 1994, 1995, 1996, 1998 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysdep.h>


const char *__assert_program_name;

#ifdef USE_IN_LIBIO
# include <libio/iolibio.h>
# define fflush(s) _IO_fflush (s)
#endif

/* This function, when passed a string containing an asserted
   expression, a filename, and a line number, prints a message
   on the standard error stream of the form:
   	a.c:10: foobar: Assertion `a == b' failed.
   It then aborts program execution via a call to `abort'.  */

#ifdef FATAL_PREPARE_INCLUDE
# include FATAL_PREPARE_INCLUDE
#endif

void
__assert_fail (const char *assertion, const char *file, unsigned int line,
	       const char *function)
{
#ifdef FATAL_PREPARE
  FATAL_PREPARE;
#endif

  /* Print the message.  */
  (void) fprintf (stderr, _("%s%s%s:%u: %s%sAssertion `%s' failed.\n"),
		  __assert_program_name ? __assert_program_name : "",
		  __assert_program_name ? ": " : "",
		  file, line,
		  function ? function : "", function ? ": " : "",
		  assertion);
  (void) fflush (stderr);

  abort ();
}

#ifdef	HAVE_GNU_LD

#include <string.h>

static void
set_progname (int argc, char **argv, char **envp)
{
  char *p;

  if (argv && argv[0])
    {
      p = strrchr (argv[0], '/');
      if (p == NULL)
	__assert_program_name = argv[0];
      else
	__assert_program_name = p + 1;
    }

  (void) &set_progname;		/* Avoid "defined but not used" warning.  */
}

text_set_element (__libc_subinit, set_progname);

#endif