/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include <string.h>

#define INCL_DOSMODULEMGR
#define INCL_DOSMISC
#include <os2.h>

#include "mad.h"
#include "madimp.h"

mad_status MADSysLoad(char *path, mad_client_routines *cli,
                      mad_imp_routines **imp, unsigned long *sys_hdl)
{
    HMODULE             dll;
    mad_imp_routines    *(*init_func)(mad_status *, mad_client_routines *);
    mad_status          status;
    char                madname[CCHMAXPATH] = "";
    char                madpath[CCHMAXPATH] = "";

    /* To prevent conflicts with the 16-bit MAD DLLs, the 32-bit versions have the "D32"
     * extension. We will search for them along the PATH (not in LIBPATH);
     */
    strcpy(madname, path);
    strcat(madname, ".D32");
    if (DosSearchPath(SEARCH_IGNORENETERRS | SEARCH_ENVIRONMENT | SEARCH_CUR_DIRECTORY,
            "PATH", madname, madpath, sizeof(madpath)) != 0)
        return MS_ERR | MS_FOPEN_FAILED;

    if (DosLoadModule(NULL, 0, madpath, &dll) != 0) {
        return MS_ERR | MS_FOPEN_FAILED;
    }
    if (DosQueryProcAddr(dll, 0, "MADLOAD", (PFN FAR *)&init_func) != 0) {
        DosFreeModule(dll);
        return MS_ERR | MS_INVALID_MAD;
    }
    *imp = init_func(&status, cli);
    if (*imp == NULL) {
        DosFreeModule(dll);
        return status;
    }
    *sys_hdl = dll;
    return MS_OK;
}

void MADSysUnload(unsigned long sys_hdl)
{
    DosFreeModule(sys_hdl);
}

