src/SDL_loadso.c
author Ryan C. Gordon <icculus@icculus.org>
Thu, 29 Sep 2005 09:43:00 +0000
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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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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/* System dependent library loading routines                           */
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#include <stdio.h>
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#if defined(USE_DLOPEN)
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# include <dlfcn.h>
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#elif defined(WIN32) || defined(_WIN32_WCE)
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# include <windows.h>
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#elif defined(__BEOS__)
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# include <be/kernel/image.h>
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#elif defined(macintosh)
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# include <string.h>
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#define OLDP2C 1
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# include <Strings.h>
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# include <CodeFragments.h>
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# include <Errors.h>
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#elif defined(__MINT__) && defined(ENABLE_LDG)
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# include <gem.h>
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# include <ldg.h>
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#else
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/*#error Unsupported dynamic link environment*/
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#endif /* system type */
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#include "SDL_types.h"
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#include "SDL_error.h"
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#include "SDL_loadso.h"
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void *SDL_LoadObject(const char *sofile)
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{
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	void *handle = NULL;
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	const char *loaderror = "SDL_LoadObject() not implemented";
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#if defined(USE_DLOPEN)
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/* * */
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	handle = dlopen(sofile, RTLD_NOW);
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	loaderror = (char *)dlerror();
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#elif defined(_WIN32_WCE)
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/* * */
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	char errbuf[512];
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	wchar_t *errbuf_t = malloc(512 * sizeof(wchar_t));
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	wchar_t *sofile_t = malloc((MAX_PATH+1) * sizeof(wchar_t));
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	MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, sofile, -1, sofile_t, MAX_PATH);
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	handle = (void *)LoadLibrary(sofile_t);
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	/* Generate an error message if all loads failed */
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	if ( handle == NULL ) {
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		FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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					FORMAT_MESSAGE_FROM_SYSTEM),
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				NULL, GetLastError(), 
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				MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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				errbuf_t, SDL_TABLESIZE(errbuf), NULL);
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		WideCharToMultiByte(CP_ACP, 0, errbuf_t, -1, errbuf, 511, NULL, NULL);
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		loaderror = errbuf;
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	}
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	free(sofile_t);
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	free(errbuf_t);
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#elif defined(WIN32)
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/* * */
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	char errbuf[512];
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	handle = (void *)LoadLibrary(sofile);
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	/* Generate an error message if all loads failed */
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	if ( handle == NULL ) {
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		FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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					FORMAT_MESSAGE_FROM_SYSTEM),
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				NULL, GetLastError(), 
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				MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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				errbuf, SDL_TABLESIZE(errbuf), NULL);
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		loaderror = errbuf;
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	}
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#elif defined(__BEOS__)
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/* * */
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	image_id library_id;
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	library_id = load_add_on(sofile);
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	if ( library_id == B_ERROR ) {
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		loaderror = "BeOS error";
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	} else {
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		handle = (void *)(library_id);
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	}
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#elif defined(macintosh)
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/* * */
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	CFragConnectionID library_id;
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	Ptr mainAddr;
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	Str255 errName;
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	OSErr error;
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	char psofile[512];
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	strncpy(psofile, sofile, SDL_TABLESIZE(psofile));
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	psofile[SDL_TABLESIZE(psofile)-1] = '\0';
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	error = GetSharedLibrary(C2PStr(psofile), kCompiledCFragArch,
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			kLoadCFrag, &library_id, &mainAddr, errName);
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	switch (error) {
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		case noErr:
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   126
			loaderror = NULL;
294
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			break;
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   128
		case cfragNoLibraryErr:
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			loaderror = "Library not found";
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			break;
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   131
		case cfragUnresolvedErr:
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			loaderror = "Unabled to resolve symbols";
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   133
			break;
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   134
		case cfragNoPrivateMemErr:
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   135
		case cfragNoClientMemErr:
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   136
			loaderror = "Out of memory";
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   137
			break;
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   138
		default:
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			loaderror = "Unknown Code Fragment Manager error";
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   140
			break;
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   141
	}
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	if ( loaderror == NULL ) {
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		handle = (void *)(library_id);
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   144
	}
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   145
#elif defined(__MINT__) && defined(ENABLE_LDG)
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   146
/* * */
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	handle = (void *)ldg_open((char *)sofile, ldg_global);
294
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#endif /* system type */
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   149
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	if ( handle == NULL ) {
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		SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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   152
	}
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   153
	return(handle);
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   154
}
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   155
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   156
void *SDL_LoadFunction(void *handle, const char *name)
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{
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   158
	void *symbol = NULL;
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   159
	const char *loaderror = "SDL_LoadFunction not implemented";
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   160
#if defined(USE_DLOPEN)
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   161
/* * */
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	symbol = dlsym(handle, name);
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   163
	if ( symbol == NULL ) {
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		loaderror = (char *)dlerror();
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   165
	}
1152
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   166
#elif defined(_WIN32_WCE)
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/* * */
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   168
	char errbuf[512];
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   169
	int length = strlen(name);
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   170
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   171
	wchar_t *name_t = malloc((length + 1) * sizeof(wchar_t));
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   172
	wchar_t *errbuf_t = malloc(512 * sizeof(wchar_t));
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   173
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   174
	MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, name, -1, name_t, length);
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   175
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   176
	symbol = (void *)GetProcAddress((HMODULE)handle, name_t);
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   177
	if ( symbol == NULL ) {
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   178
		FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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   179
					FORMAT_MESSAGE_FROM_SYSTEM),
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   180
				NULL, GetLastError(), 
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   181
				MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
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   182
				errbuf_t, SDL_TABLESIZE(errbuf), NULL);
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   183
		WideCharToMultiByte(CP_ACP, 0, errbuf_t, -1, errbuf, 511, NULL, NULL);
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   184
		loaderror = errbuf;
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   185
	}
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   186
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diff changeset
   187
	free(name_t);
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
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   188
	free(errbuf_t);
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diff changeset
   189
294
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   190
#elif defined(WIN32)
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   191
/* * */
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   192
	char errbuf[512];
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   193
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   194
	symbol = (void *)GetProcAddress((HMODULE)handle, name);
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   195
	if ( symbol == NULL ) {
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   196
		FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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   197
					FORMAT_MESSAGE_FROM_SYSTEM),
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   198
				NULL, GetLastError(), 
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   199
				MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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   200
				errbuf, SDL_TABLESIZE(errbuf), NULL);
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   201
		loaderror = errbuf;
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   202
	}
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   203
#elif defined(__BEOS__)
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   204
/* * */
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   205
	image_id library_id = (image_id)handle;
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   206
	if ( get_image_symbol(library_id,
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   207
		name, B_SYMBOL_TYPE_TEXT, &symbol) != B_NO_ERROR ) {
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   208
		loaderror = "Symbol not found";
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diff changeset
   209
	}
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   210
#elif defined(macintosh)
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   211
/* * */
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   212
	CFragSymbolClass class;
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   213
	CFragConnectionID library_id = (CFragConnectionID)handle;
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   214
	char pname[512];
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   215
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   216
	strncpy(pname, name, SDL_TABLESIZE(pname));
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   217
	pname[SDL_TABLESIZE(pname)-1] = '\0';
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   218
	if ( FindSymbol(library_id, C2PStr(pname),
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   219
	                (char **)&symbol, &class) != noErr ) {
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   220
		loaderror = "Symbol not found";
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diff changeset
   221
	}
651
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diff changeset
   222
#elif defined(__MINT__) && defined(ENABLE_LDG)
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   223
/* * */
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   224
	symbol = (void *)ldg_find((char *)name, (LDG *)handle);
294
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   225
#endif /* system type */
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   226
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   227
	if ( symbol == NULL ) {
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   228
		SDL_SetError("Failed loading %s: %s", name, loaderror);
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   229
	}
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   230
	return(symbol);
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   231
}
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   232
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   233
void SDL_UnloadObject(void *handle)
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   234
{
336
745873ea091f BeOS compile fix for shared object loading code
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diff changeset
   235
#if defined(__BEOS__)
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   236
	image_id library_id;
707
c67d4fb10a45 *** empty log message ***
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   237
#elif defined(macintosh)
c67d4fb10a45 *** empty log message ***
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   238
	CFragConnectionID library_id;
336
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   239
#endif
294
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   240
	if ( handle == NULL ) {
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   241
		return;
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   242
	}
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   243
#if defined(USE_DLOPEN)
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/* * */
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	dlclose(handle);
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   246
#elif defined(WIN32)
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   247
/* * */
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	FreeLibrary((HMODULE)handle);
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   249
#elif defined(__BEOS__)
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   250
/* * */
336
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   251
	library_id = (image_id)handle;
294
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   252
	unload_add_on(library_id);
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   253
#elif defined(macintosh)
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/* * */
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	library_id = (CFragConnectionID)handle;
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	CloseConnection(&library_id);
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#elif defined(__MINT__) && defined(ENABLE_LDG)
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/* * */
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	ldg_close((LDG *)handle, ldg_global);
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#endif /* system type */
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}