/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Library General Public

License as published by the Free Software Foundation; either

version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with this library; if not, write to the Free

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Sam Lantinga

slouken@libsdl.org

*/

#ifdef SAVE_RCSID

static char rcsid =

"@(#) $Id$";

#endif

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/* System dependent library loading routines */

#include <stdio.h>

#if defined(USE_DLOPEN)

# include <dlfcn.h>

#elif defined(WIN32)

# include <windows.h>

#elif defined(__BEOS__)

# include <be/kernel/image.h>

#elif defined(macintosh)

# include <string.h>

# include <Strings.h>

# include <CodeFragments.h>

# include <Errors.h>

#else

/*#error Unsupported dynamic link environment*/

#endif /* system type */

#include "SDL_error.h"

#include "SDL_loadso.h"

void *SDL_LoadObject(const char *sofile)

{

void *handle = NULL;

const char *loaderror = "SDL_LoadObject() not implemented";

#if defined(USE_DLOPEN)

/* * */

handle = dlopen(sofile, RTLD_NOW);

loaderror = (char *)dlerror();

#elif defined(WIN32)

/* * */

char errbuf[512];

handle = (void *)LoadLibrary(sofile);

/* Generate an error message if all loads failed */

if ( handle == NULL ) {

FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |

FORMAT_MESSAGE_FROM_SYSTEM),

NULL, GetLastError(),

MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),

errbuf, SDL_TABLESIZE(errbuf), NULL);

loaderror = errbuf;

}

#elif defined(__BEOS__)

/* * */

image_id library_id;

library_id = load_add_on(sofile);

if ( library_id == B_ERROR ) {

loaderror = "BeOS error";

} else {

handle = (void *)(library_id);

}

#elif defined(macintosh)

/* * */

CFragConnectionID library_id;

Ptr mainAddr;

Str255 errName;

OSErr error;

char psofile[512];

strncpy(psofile, sofile, SDL_TABLESIZE(psofile));

psofile[SDL_TABLESIZE(psofile)-1] = '\0';

error = GetSharedLibrary(C2PStr(psofile), kCompiledCFragArch,

kLoadCFrag, &library_id, &mainAddr, errName);

switch (error) {

case noErr:

break;

case cfragNoLibraryErr:

loaderror = "Library not found";

break;

case cfragUnresolvedErr:

loaderror = "Unabled to resolve symbols";

break;

case cfragNoPrivateMemErr:

case cfragNoClientMemErr:

loaderror = "Out of memory";

break;

default:

loaderror = "Unknown Code Fragment Manager error";

break;

}

if ( loaderror == NULL ) {

handle = (void *)(library_id);

}

#endif /* system type */

if ( handle == NULL ) {

SDL_SetError("Failed loading %s: %s", sofile, loaderror);

}

return(handle);

}

void *SDL_LoadFunction(void *handle, const char *name)

{

void *symbol = NULL;

const char *loaderror = "SDL_LoadFunction not implemented";

#if defined(USE_DLOPEN)

/* * */

symbol = dlsym(handle, name);

if ( symbol == NULL ) {

loaderror = (char *)dlerror();

}

#elif defined(WIN32)

/* * */

char errbuf[512];

symbol = (void *)GetProcAddress((HMODULE)handle, name);

if ( symbol == NULL ) {

FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |

FORMAT_MESSAGE_FROM_SYSTEM),

NULL, GetLastError(),

MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),

errbuf, SDL_TABLESIZE(errbuf), NULL);

loaderror = errbuf;

}

#elif defined(__BEOS__)

/* * */

image_id library_id = (image_id)handle;

if ( get_image_symbol(library_id,

name, B_SYMBOL_TYPE_TEXT, &symbol) != B_NO_ERROR ) {

loaderror = "Symbol not found";

}

#elif defined(macintosh)

/* * */

CFragSymbolClass class;

CFragConnectionID library_id = (CFragConnectionID)handle;

char pname[512];

strncpy(pname, name, SDL_TABLESIZE(pname));

pname[SDL_TABLESIZE(pname)-1] = '\0';

if ( FindSymbol(library_id, C2PStr(pname),

(char **)&symbol, &class) != noErr ) {

loaderror = "Symbol not found";

}

#endif /* system type */

if ( symbol == NULL ) {

SDL_SetError("Failed loading %s: %s", name, loaderror);

}

return(symbol);

}

void SDL_UnloadObject(void *handle)

{

if ( handle == NULL ) {

return;

}

#if defined(USE_DLOPEN)

/* * */

dlclose(handle);

#elif defined(WIN32)

/* * */

FreeLibrary((HMODULE)handle);

#elif defined(__BEOS__)

/* * */

image_id library_id = (image_id)handle;

unload_add_on(library_id);

#elif defined(macintosh)

/* * */

CFragConnectionID library_id = (CFragConnectionID)handle;

CloseConnection(library_id);

#endif /* system type */

}