1 /*
   2  * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 #include <dlfcn.h>
  26 #include <stdlib.h>

  27 #include "jvm_md.h"
  28 #include "gtk_interface.h"
  29 
  30 GtkApi* gtk2_load(JNIEnv *env, const char* lib_name);
  31 GtkApi* gtk3_load(JNIEnv *env, const char* lib_name);
  32 
  33 gboolean gtk2_check(const char* lib_name, int flags);
  34 gboolean gtk3_check(const char* lib_name, int flags);
  35 
  36 GtkApi *gtk;
  37 
  38 typedef struct {
  39     GtkVersion version;
  40     const char* name;
  41     const char* vname;
  42     GtkApi* (*load)(JNIEnv *env, const char* lib_name);
  43     gboolean (*check)(const char* lib_name, int flags);
  44 } GtkLib;
  45 
  46 static GtkLib libs[] = {
  47     {
  48         GTK_2,
  49         JNI_LIB_NAME("gtk-x11-2.0"),
  50         VERSIONED_JNI_LIB_NAME("gtk-x11-2.0", "0"),
  51         &gtk2_load,
  52         &gtk2_check
  53     },
  54     {
  55         GTK_3,
  56         JNI_LIB_NAME("gtk-3"),
  57         VERSIONED_JNI_LIB_NAME("gtk-3", "0"),
  58         &gtk3_load,
  59         &gtk3_check
  60     },
  61     {
  62         0,
  63         NULL,
  64         NULL,
  65         NULL,
  66         NULL
  67     }
  68 };
  69 

















  70 static GtkLib* get_loaded() {
  71     GtkLib* lib = libs;
  72     while(!gtk && lib->version) {
  73         if (lib->check(lib->vname, RTLD_NOLOAD)) {
  74             return lib;
  75         }
  76         if (lib->check(lib->name, RTLD_NOLOAD)) {
  77             return lib;
  78         }
  79         lib++;
  80     }
  81     return NULL;
  82 }
  83 
  84 gboolean gtk_load(JNIEnv *env, GtkVersion version, gboolean verbose) {
  85     if (gtk == NULL) {
  86         GtkLib* lib = get_loaded();
  87         if (lib) {



  88             if (version != GTK_ANY && lib->version != version) {
  89                 if (verbose) {
  90                     fprintf(stderr, "WARNING: Cannot load GTK%d library: \
  91                          GTK%d has already been loaded\n", version, lib->version);
  92                 }
  93                 return FALSE;
  94             }
  95             if (verbose) {
  96                 fprintf(stderr, "Looking for GTK%d library...\n", version);
  97             }
  98             gtk = lib->load(env, lib->vname);
  99             if (!gtk) {
 100                 gtk = lib->load(env, lib->name);
 101             }
 102         } else {
 103             lib = libs;
 104             while (!gtk && lib->version) {
 105                 if (version == GTK_ANY || lib->version == version) {
 106                     if (verbose) {
 107                         fprintf(stderr, "Looking for GTK%d library...\n",
 108                                                                   lib->version);
 109                     }
 110                     gtk = lib->load(env, lib->vname);
 111                     if (!gtk) {
 112                         gtk = lib->load(env, lib->name);
 113                     }
 114                     if (verbose && !gtk) {
 115                         fprintf(stderr, "Not found.\n");
 116                     }
 117                 }
 118                 lib++;
 119             }
 120             lib--;
 121         }
 122         if (verbose) {
 123             if (gtk) {
 124                 fprintf(stderr, "GTK%d library loaded.\n", lib->version);
 125             } else {
 126                 fprintf(stderr, "Failed to load GTK library.\n");
 127             }
 128         }
 129     }
 130     return gtk != NULL;
 131 }
 132 
 133 static gboolean check_version(GtkVersion version, int flags) {
 134     GtkLib* lib = libs;
 135     while (lib->version) {
 136         if (version == GTK_ANY || lib->version == version) {
 137             if (lib->check(lib->vname, flags)) {
 138                 return TRUE;
 139             }
 140             if (lib->check(lib->name, flags)) {
 141                 return TRUE;
 142             }
 143         }
 144         lib++;
 145     }
 146     return FALSE;
 147 }
 148 
 149 gboolean gtk_check_version(GtkVersion version) {
 150     if (gtk) {
 151         return TRUE;
 152     }
 153     if (check_version(version, RTLD_NOLOAD)) {
 154         return TRUE;

 155     }
 156     return check_version(version, RTLD_LAZY | RTLD_LOCAL);
 157 }
 158 
--- EOF ---