src/SDL_error_c.h
author Sam Lantinga <slouken@libsdl.org>
Sun, 18 Jul 2004 22:57:40 +0000
changeset 911 04a403e4ccf5
parent 769 b8d311d90021
child 1312 c9b51268668f
permissions -rw-r--r--
Date: Mon, 3 May 2004 03:15:01 +0100
From: David Symmonds
Subject: SDL Typedef Structs

Hi, Thanks for the SDL libraries, I have been using them for about a year
now and they are really brilliant. One thing that I have just found whilst
using them through C++ (and needing forward declarations) is that when you
typedef structs you sometimes use

typedef struct Name
{
...
}Name;

e.g. SDL_Surface


and other times use

typedef struct
{
...
}Name;


e.g. SDL_Rect

The first type works fine, when I define a header file I can just put
'struct Name;' at the top and use the Name throughout. However, the second
type is harder to use in a header, and I haven't found a way yet, other than
to include 'SDL.h' in the header file (undesirable). Would there be any harm
in changing the definition of SDL_Rect and such like to the second form?
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2004 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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 "@(#) $Id$";
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#endif
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/* This file defines a structure that carries language-independent
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   error messages
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*/
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#ifndef _SDL_error_c_h
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#define _SDL_error_c_h
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#define ERR_MAX_STRLEN	128
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#define ERR_MAX_ARGS	5
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typedef struct SDL_error {
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	/* This is a numeric value corresponding to the current error */
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	int error;
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	/* This is a key used to index into a language hashtable containing
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	   internationalized versions of the SDL error messages.  If the key
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	   is not in the hashtable, or no hashtable is available, the key is
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	   used directly as an error message format string.
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	*/
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	unsigned char key[ERR_MAX_STRLEN];
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	/* These are the arguments for the error functions */
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	int argc;
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	union {
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		void *value_ptr;
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#if 0	/* What is a character anyway?  (UNICODE issues) */
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		unsigned char value_c;
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#endif
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		int value_i;
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		double value_f;
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		unsigned char buf[ERR_MAX_STRLEN];
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	} args[ERR_MAX_ARGS];
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} SDL_error;
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#endif /* _SDL_error_c_h */