/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#ifdef SDL_LOADSO_MACOS

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* System dependent library loading routines                           */

#include <stdio.h>
#include <string.h>
#define OLDP2C 1
#include <Strings.h>
#include <CodeFragments.h>
#include <Errors.h>

#include "SDL_loadso.h"

void *
SDL_LoadObject(const char *sofile)
{
    void *handle = NULL;
    const char *loaderror = NULL;
    CFragConnectionID library_id;
    Ptr mainAddr;
    Str255 errName;
    OSErr error;
    char psofile[512];

    SDL_strlcpy(psofile, sofile, SDL_arraysize(psofile));
    error = GetSharedLibrary(C2PStr(psofile), kCompiledCFragArch,
                             kLoadCFrag, &library_id, &mainAddr, errName);
    switch (error) {
    case noErr:
        loaderror = NULL;
        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);
    } else {
        SDL_SetError("Failed loading %s: %s", sofile, loaderror);
    }
    return (handle);
}

void *
SDL_LoadFunction(void *handle, const char *name)
{
    void *symbol = NULL;
    const char *loaderror = NULL;
    CFragSymbolClass class;
    CFragConnectionID library_id = (CFragConnectionID) handle;
    char pname[512];

    SDL_strlcpy(pname, name, SDL_arraysize(pname));
    if (FindSymbol(library_id, C2PStr(pname),
                   (char **) &symbol, &class) != noErr) {
        loaderror = "Symbol not found";
    }

    if (symbol == NULL) {
        SDL_SetError("Failed loading %s: %s", name, loaderror);
    }
    return (symbol);
}

void
SDL_UnloadObject(void *handle)
{
    CFragConnectionID library_id;
    if (handle != NULL) {
        library_id = (CFragConnectionID) handle;
        CloseConnection(&library_id);
    }
}

#endif /* SDL_LOADSO_MACOS */
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