/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

#include <stdio.h>
#include <stdlib.h>
#include <linux/fb.h>
#include <fcntl.h>
#ifndef __USE_GNU       // required for dladdr() & Dl_info
#define __USE_GNU
#endif
#include <dlfcn.h>
#include <sys/ioctl.h>

#include <string.h>
#include <strings.h>
#include <stdlib.h>

#include <assert.h>

#include <gtk/gtk.h>

#include "wrapper.h"

int wrapper_debug = 0;
int wrapper_loaded = 0;
int wrapper_gtk_version = 0;
int wrapper_gtk_versionDebug = 0;

int wrapper_load_symbols(int version, int verbose) {
    if (wrapper_loaded) {
        return wrapper_gtk_version;
    }

    wrapper_gtk_versionDebug = verbose;
    wrapper_debug = verbose; //DAVE remove before commit

    int success = 1;

    if (version == 3) {
        wrapper_gtk_version = 3;
    } else if (version == 0 || version == 2) {
        wrapper_gtk_version = 2;
    } else {
        fprintf(stderr,"Unrecognized GTK version requested, falling back to v 2.0\n");
        fflush(stderr);
        wrapper_gtk_version = 2;
    }

    if (wrapper_gtk_versionDebug) {
        fprintf(stderr,"Loading GTK libraries version %d\n",version);
    }
    if (wrapper_load_symbols_gtk(wrapper_gtk_version) != 0 ) {
        if (version == 0) {
            // specific version not set, try the other
            wrapper_gtk_version = wrapper_gtk_version == 2 ? 3 : 2;
            if (wrapper_gtk_versionDebug) {
                fprintf(stderr,"Warning: trying alternate GTK version %d\n",
                    wrapper_gtk_version);
                fflush(stderr);
            }
            if (wrapper_load_symbols_gtk(wrapper_gtk_version) != 0 ) {
                success = 0;
            }
        }
    }

    if (success && wrapper_load_symbols_gdk(wrapper_gtk_version) != 0 ) {
        success = 0;
    }

    if (success && wrapper_load_symbols_pix(wrapper_gtk_version) != 0 ) {
        success = 0;
    }

    if (!success) {
        fprintf (stderr, "Fatal Error: Could not resolve symbols in GTK libraries %d \n",version);
        fflush(stderr);
        exit(-10);
    }

    wrapper_loaded = 1;

    return version;
}