src/vtx2ascii-src/vtx_assert.h

   1 /* $Id: vtx_assert.h,v 1.1 1996/10/01 21:25:20 mb Exp mb $
   2  *
   3  * Copyright (c) 1994-96 Martin Buck  <martin-2.buck@student.uni-ulm.de>
   4  * Read COPYING for more information
   5  */
   6
   7 /* This header file provides an alternative to the standard assert: You can
   8  * choose wheter or not your program should dump core when an assertion
   9  * fails. If you don't define ASSERT_DUMP_CORE, your program will print the
  10  * `failed assertion'-message and call exit(1) without a coredump.
  11  *
  12  * The reason for this is that you can lock up your X-server when assert
  13  * calls abort() at the wrong time (probably during grabs). If you can't
  14  * login on a serial line or over the network to kill the X-server, you will
  15  * have to reboot your machine (I once experienced this with another
  16  * application -- not even XFree's ZapServer-key did work)!
  17  *
  18  * There has been a report that in VideoteXt an assertion fails when a
  19  * station broadcasts a multipage-extension-table. I wasn't able to
  20  * reproduce this and I don't think that this was the reason for the abort,
  21  * but I decided to use this alternative assert just to make sure VideoteXt
  22  * doesn't do bad things[tm] to your machine :-)
  23  *
  24  * But if you get `failed assertion'-messages, *please* report them to me!
  25  */
  26
  27 #include <stdio.h>
  28
  29 #undef assert
  30 #undef __assert
  31
  32 #ifdef NDEBUG
  33 #define assert(ignore) ((void) 0)
  34 #else
  35
  36 #define assert(exp) ((void) ((exp) ? 0 : __assert (#exp, __FILE__, __LINE__)))
  37
  38 #ifdef ASSERT_DUMP_CORE
  39 #define __assert(exp, file, lineno)  \
  40     (fprintf (stderr, "%s:%u: failed assertion `%s'\n", file, lineno, exp), abort (), 0)
  41 #else
  42 #define __assert(exp, file, lineno)  \
  43     (fprintf (stderr, "%s:%u: failed assertion `%s'\nTerminating\n", file, lineno, exp), \
  44     exit (1), 0)
  45 #endif
  46 #endif