Added plugin loader. Moved games, demos and the text viewer to loadable plugins. Copy your *.rock files to /.rockbox/rocks/

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3769 a1c6a512-1295-4272-9138-f99709370657

apps/plugin.c

@@ -0,0 +1,221 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 Björn Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+#include "button.h"
+#include "lcd.h"
+#include "dir.h"
+#include "file.h"
+#include "kernel.h"
+#include "sprintf.h"
+#include "screens.h"
+#include "misc.h"
+#include "mas.h"
+#include "plugin.h"
+#include "lang.h"
+
+#ifdef SIMULATOR
+#include <dlfcn.h>
+#define PREFIX(_x_) x11_ ## _x_
+#else
+#define PREFIX(_x_) _x_
+#endif
+
+static int plugin_test(int api_version, int model);
+
+static struct plugin_api rockbox_api = {
+    PLUGIN_API_VERSION,
+
+    plugin_test,
+    
+    /* lcd */
+    lcd_clear_display,
+    lcd_puts,
+    lcd_puts_scroll,
+    lcd_stop_scroll,
+#ifdef HAVE_LCD_CHARCELLS
+    lcd_define_pattern,
+#else
+    lcd_putsxy,
+    lcd_bitmap,
+    lcd_drawline,
+    lcd_clearline,
+    lcd_drawpixel,
+    lcd_clearpixel,
+    lcd_setfont,
+    lcd_clearrect,
+    lcd_fillrect,
+    lcd_drawrect,
+    lcd_invertrect,
+    lcd_getstringsize,
+    lcd_update,
+    lcd_update_rect,
+#ifndef SIMULATOR
+    lcd_roll,
+#endif
+#endif
+
+    /* button */
+    button_get,
+    button_get_w_tmo,
+
+    /* file */
+    PREFIX(open),
+    PREFIX(close),
+    read,
+    lseek,
+    PREFIX(creat),
+    write,
+    remove,
+    rename,
+    ftruncate,
+    PREFIX(filesize),
+    fprintf,
+    read_line,
+
+    /* dir */
+    PREFIX(opendir),
+    PREFIX(closedir),
+    PREFIX(readdir),
+
+    /* kernel */
+    PREFIX(sleep),
+    usb_screen,
+    &current_tick,
+
+    /* strings and memory */
+    snprintf,
+    strcpy,
+    strlen,
+    memset,
+    memcpy,
+
+    /* sound */
+#ifndef SIMULATOR
+#ifdef HAVE_MAS3587F
+    mas_codec_readreg,
+#endif
+#endif
+    
+    /* misc */
+    srand,
+    rand,
+    splash,
+};
+
+int plugin_load(char* plugin, void* parameter)
+{
+    enum plugin_status (*plugin_start)(struct plugin_api* api, void* param);
+    int rc;
+    char buf[64];
+#ifdef SIMULATOR
+    void* pd;
+    char path[256];
+#else
+    extern unsigned char pluginbuf[];
+    int fd;
+#endif
+
+    lcd_clear_display();
+#ifdef HAVE_LCD_BITMAP
+    lcd_setmargins(0,0);
+    lcd_update();
+#endif
+#ifdef SIMULATOR
+    snprintf(path, sizeof path, "archos%s", plugin);
+    pd = dlopen(path, RTLD_NOW);
+    if (!pd) {
+        snprintf(buf, sizeof buf, "Can't open %s", plugin);
+        splash(HZ*2, 0, true, buf);
+        dlclose(pd);
+        return -1;
+    }
+
+    plugin_start = dlsym(pd, "plugin_start");
+    if (!plugin_start) {
+        plugin_start = dlsym(pd, "_plugin_start");
+        if (!plugin_start) {
+            splash(HZ*2, 0, true, "Can't find entry point");
+            dlclose(pd);
+            return -1;
+        }
+    }
+#else
+    fd = open(plugin, O_RDONLY);
+    if (fd < 0) {
+        snprintf(buf, sizeof buf, str(LANG_PLUGIN_CANT_OPEN), plugin);
+        splash(HZ*2, 0, true, buf);
+        return fd;
+    }
+
+    plugin_start = (void*)&pluginbuf;
+    rc = read(fd, plugin_start, 0x8000);
+    close(fd);
+    if (rc < 0) {
+        /* read error */
+        snprintf(buf, sizeof buf, str(LANG_READ_FAILED), plugin);
+        splash(HZ*2, 0, true, buf);
+        return -1;
+    }
+    if (rc == 0) {
+        /* loaded a 0-byte plugin, implying it's not for this model */
+        splash(HZ*2, 0, true, str(LANG_PLUGIN_WRONG_MODEL));
+        return -1;
+    }
+#endif
+
+    rc = plugin_start(&rockbox_api, parameter);
+    switch (rc) {
+        case PLUGIN_OK:
+            break;
+
+        case PLUGIN_USB_CONNECTED:
+            return PLUGIN_USB_CONNECTED;
+
+        case PLUGIN_WRONG_API_VERSION:
+            splash(HZ*2, 0, true, str(LANG_PLUGIN_WRONG_VERSION));
+            break;
+
+        case PLUGIN_WRONG_MODEL:
+            splash(HZ*2, 0, true, str(LANG_PLUGIN_WRONG_MODEL));
+            break;
+
+        default:
+            splash(HZ*2, 0, true, str(LANG_PLUGIN_ERROR));
+            break;
+    }
+
+#ifdef SIMULATOR
+    dlclose(pd);
+#endif
+    
+    return PLUGIN_OK;
+}
+
+int plugin_test(int api_version, int model)
+{
+    if (api_version != PLUGIN_API_VERSION)
+        return PLUGIN_WRONG_API_VERSION;
+
+    if (model != MODEL)
+        return PLUGIN_WRONG_MODEL;
+
+    return PLUGIN_OK;
+}