allegro_error man page on DragonFly

allegro_error man page on DragonFly

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allegro_error(3)		Allegro manual		      allegro_error(3)

NAME
       allegro_error - Stores the last Allegro error message.

SYNOPSIS
       #include <allegro.h>

       extern char allegro_error[ALLEGRO_ERROR_SIZE];

DESCRIPTION
       Text string used by set_gfx_mode(), install_sound() and other functions
       to report error messages. If they fail and you want to  tell  the  user
       why,  this is the place to look for a description of the problem. Exam‐
       ple:

	  void abort_on_error(const char *message)
	  {
	     if (screen != NULL)
		set_gfx_mode(GFX_TEXT, 0, 0, 0, 0);

	     allegro_message("%s.\nLast Allegro error `%s'\n",
			     message, allegro_error);
	     exit(-1);
	  }
	  ...
	     if (some_allegro_function() == ERROR_CODE)
		abort_on_error("Error calling some function!");

SEE ALSO
       set_gfx_mode(3), install_sound(3)

Allegro				 version 4.4.2		      allegro_error(3)

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