assert/assert.c

   1 /* Copyright (C) 1991,1994,1995,1996,1998,2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <assert.h>
  20 #include <libintl.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <sysdep.h>
  24
  25
  26 extern const char *__progname;
  27
  28 #ifdef USE_IN_LIBIO
  29 # include <wchar.h>
  30 # include <libio/iolibio.h>
  31 # define fflush(s) _IO_fflush (s)
  32 #endif
  33
  34 /* This function, when passed a string containing an asserted
  35    expression, a filename, and a line number, prints a message
  36    on the standard error stream of the form:
  37         a.c:10: foobar: Assertion `a == b' failed.
  38    It then aborts program execution via a call to `abort'.  */
  39
  40 #ifdef FATAL_PREPARE_INCLUDE
  41 # include FATAL_PREPARE_INCLUDE
  42 #endif
  43
  44 void
  45 __assert_fail (const char *assertion, const char *file, unsigned int line,
  46                const char *function)
  47 {
  48   char *buf;
  49
  50 #ifdef FATAL_PREPARE
  51   FATAL_PREPARE;
  52 #endif
  53
  54   (void) __asprintf (&buf, _("%s%s%s:%u: %s%sAssertion `%s' failed.\n"),
  55                      __progname, __progname[0] ? ": " : "",
  56                      file, line,
  57                      function ? function : "", function ? ": " : "",
  58                      assertion);
  59
  60   /* Print the message.  */
  61 #ifdef USE_IN_LIBIO
  62   if (_IO_fwide (stderr, 0) > 0)
  63     (void) __fwprintf (stderr, L"%s", buf);
  64   else
  65 #endif
  66     (void) fputs (buf, stderr);
  67
  68   (void) fflush (stderr);
  69
  70   /* We have to free the buffer since the appplication might catch the
  71      SIGABRT.  */
  72   free (buf);
  73
  74   abort ();
  75 }