Split the over-large module.c

src/Makefile.am

@@ -295,7 +295,9 @@ SOURCES_libvlc_common = \
 	misc/block.c \
 	modules/modules.h \
 	modules/modules.c \
+	modules/cache.c \
 	modules/entry.c \
+	modules/os.c \
 	misc/threads.c \
 	misc/stats.c \
 	misc/cpu.c \

src/modules/cache.c

+/*****************************************************************************
+ * cache.c: Plugins cache
+ *****************************************************************************
+ * Copyright (C) 2001-2007 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Sam Hocevar <sam@zoy.org>
+ *          Ethan C. Baldridge <BaldridgeE@cadmus.com>
+ *          Hans-Peter Jansen <hpj@urpla.net>
+ *          Gildas Bazin <gbazin@videolan.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#include <vlc/vlc.h>
+#include "libvlc.h"
+
+/* Some faulty libcs have a broken struct dirent when _FILE_OFFSET_BITS
+ * is set to 64. Don't try to be cleverer. */
+#ifdef _FILE_OFFSET_BITS
+#undef _FILE_OFFSET_BITS
+#endif
+
+#include <stdlib.h>                                      /* free(), strtol() */
+#include <stdio.h>                                              /* sprintf() */
+#include <string.h>                                              /* strdup() */
+
+#ifdef HAVE_DIRENT_H
+#   include <dirent.h>
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+#   include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+#   include <sys/stat.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#   include <unistd.h>
+#endif
+
+#if !defined(HAVE_DYNAMIC_PLUGINS)
+    /* no support for plugins */
+#elif defined(HAVE_DL_DYLD)
+#   if defined(HAVE_MACH_O_DYLD_H)
+#       include <mach-o/dyld.h>
+#   endif
+#elif defined(HAVE_DL_BEOS)
+#   if defined(HAVE_IMAGE_H)
+#       include <image.h>
+#   endif
+#elif defined(HAVE_DL_WINDOWS)
+#   include <windows.h>
+#elif defined(HAVE_DL_DLOPEN)
+#   if defined(HAVE_DLFCN_H) /* Linux, BSD, Hurd */
+#       include <dlfcn.h>
+#   endif
+#   if defined(HAVE_SYS_DL_H)
+#       include <sys/dl.h>
+#   endif
+#elif defined(HAVE_DL_SHL_LOAD)
+#   if defined(HAVE_DL_H)
+#       include <dl.h>
+#   endif
+#endif
+
+#include "config/config.h"
+
+#include "vlc_charset.h"
+
+#include "modules/modules.h"
+#include "modules/builtin.h"
+
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+#ifdef HAVE_DYNAMIC_PLUGINS
+static int    CacheLoadConfig  ( module_t *, FILE * );
+static void   CacheSaveConfig  ( module_t *, FILE * );
+static char * CacheName        ( void );
+
+/* Sub-version number
+ * (only used to avoid breakage in dev version when cache structure changes) */
+#define CACHE_SUBVERSION_NUM 3
+
+/*****************************************************************************
+ * LoadPluginsCache: loads the plugins cache file
+ *****************************************************************************
+ * This function will load the plugin cache if present and valid. This cache
+ * will in turn be queried by AllocateAllPlugins() to see if it needs to
+ * actually load the dynamically loadable module.
+ * This allows us to only fully load plugins when they are actually used.
+ *****************************************************************************/
+void CacheLoad( vlc_object_t *p_this )
+{
+    char *psz_filename, *psz_cachedir;
+    FILE *file;
+    int i, j, i_size, i_read;
+    char p_cachestring[sizeof("cache " COPYRIGHT_MESSAGE)];
+    char p_cachelang[6], p_lang[6];
+    int i_cache;
+    module_cache_t **pp_cache = 0;
+    int32_t i_file_size, i_marker;
+    libvlc_global_data_t *p_libvlc_global = vlc_global();
+
+    psz_cachedir = p_this->p_libvlc->psz_cachedir;
+    if( !psz_cachedir ) /* XXX: this should never happen */
+    {
+        msg_Err( p_this, "Unable to get cache directory" );
+        return;
+    }
+
+    i_size = asprintf( &psz_filename, "%s"DIR_SEP"%s",
+                       psz_cachedir, CacheName() );
+    if( i_size <= 0 )
+    {
+        msg_Err( p_this, "out of memory" );
+        return;
+    }
+
+    if( p_libvlc_global->p_module_bank->b_cache_delete )
+    {
+#if !defined( UNDER_CE )
+        unlink( psz_filename );
+#else
+        wchar_t psz_wf[MAX_PATH];
+        MultiByteToWideChar( CP_ACP, 0, psz_filename, -1, psz_wf, MAX_PATH );
+        DeleteFile( psz_wf );
+#endif
+        msg_Dbg( p_this, "removing plugins cache file %s", psz_filename );
+        free( psz_filename );
+        return;
+    }
+
+    msg_Dbg( p_this, "loading plugins cache file %s", psz_filename );
+
+    file = utf8_fopen( psz_filename, "rb" );
+    if( !file )
+    {
+        msg_Warn( p_this, "could not open plugins cache file %s for reading",
+                  psz_filename );
+        free( psz_filename );
+        return;
+    }
+    free( psz_filename );
+
+    /* Check the file size */
+    i_read = fread( &i_file_size, 1, sizeof(i_file_size), file );
+    if( i_read != sizeof(i_file_size) )
+    {
+        msg_Warn( p_this, "This doesn't look like a valid plugins cache "
+                  "(too short)" );
+        fclose( file );
+        return;
+    }
+
+    fseek( file, 0, SEEK_END );
+    if( ftell( file ) != i_file_size )
+    {
+        msg_Warn( p_this, "This doesn't look like a valid plugins cache "
+                  "(corrupted size)" );
+        fclose( file );
+        return;
+    }
+    fseek( file, sizeof(i_file_size), SEEK_SET );
+
+    /* Check the file is a plugins cache */
+    i_size = sizeof("cache " COPYRIGHT_MESSAGE) - 1;
+    i_read = fread( p_cachestring, 1, i_size, file );
+    if( i_read != i_size ||
+        memcmp( p_cachestring, "cache " COPYRIGHT_MESSAGE, i_size ) )
+    {
+        msg_Warn( p_this, "This doesn't look like a valid plugins cache" );
+        fclose( file );
+        return;
+    }
+
+    /* Check Sub-version number */
+    i_read = fread( &i_marker, 1, sizeof(i_marker), file );
+    if( i_read != sizeof(i_marker) || i_marker != CACHE_SUBVERSION_NUM )
+    {
+        msg_Warn( p_this, "This doesn't look like a valid plugins cache "
+                  "(corrupted header)" );
+        fclose( file );
+        return;
+    }
+
+    /* Check the language hasn't changed */
+    sprintf( p_lang, "%5.5s", _("C") ); i_size = 5;
+    i_read = fread( p_cachelang, 1, i_size, file );
+    if( i_read != i_size || memcmp( p_cachelang, p_lang, i_size ) )
+    {
+        msg_Warn( p_this, "This doesn't look like a valid plugins cache "
+                  "(language changed)" );
+        fclose( file );
+        return;
+    }
+
+    /* Check header marker */
+    i_read = fread( &i_marker, 1, sizeof(i_marker), file );
+    if( i_read != sizeof(i_marker) ||
+        i_marker != ftell( file ) - (int)sizeof(i_marker) )
+    {
+        msg_Warn( p_this, "This doesn't look like a valid plugins cache "
+                  "(corrupted header)" );
+        fclose( file );
+        return;
+    }
+
+    p_libvlc_global->p_module_bank->i_loaded_cache = 0;
+    if (fread( &i_cache, 1, sizeof(i_cache), file ) != sizeof(i_cache) )
+    {
+        msg_Warn( p_this, "This doesn't look like a valid plugins cache "
+                  "(file too short)" );
+        fclose( file );
+        return;
+    }
+
+    if( i_cache )
+        pp_cache = p_libvlc_global->p_module_bank->pp_loaded_cache =
+                   malloc( i_cache * sizeof(void *) );
+
+#define LOAD_IMMEDIATE(a) \
+    if( fread( (void *)&a, sizeof(char), sizeof(a), file ) != sizeof(a) ) goto error
+#define LOAD_STRING(a) \
+{ \
+    a = NULL; \
+    if( ( fread( &i_size, sizeof(i_size), 1, file ) != 1 ) \
+     || ( i_size > 16384 ) ) \
+        goto error; \
+    if( i_size ) { \
+        char *psz = malloc( i_size ); \
+        if( fread( psz, i_size, 1, file ) != 1 ) { \
+            free( psz ); \
+            goto error; \
+        } \
+        if( psz[i_size-1] ) { \
+            free( psz ); \
+            goto error; \
+        } \
+        a = psz; \
+    } \
+}
+
+    for( i = 0; i < i_cache; i++ )
+    {
+        uint16_t i_size;
+        int i_submodules;
+
+        pp_cache[i] = malloc( sizeof(module_cache_t) );
+        p_libvlc_global->p_module_bank->i_loaded_cache++;
+
+        /* Load common info */
+        LOAD_STRING( pp_cache[i]->psz_file );
+        LOAD_IMMEDIATE( pp_cache[i]->i_time );
+        LOAD_IMMEDIATE( pp_cache[i]->i_size );
+        LOAD_IMMEDIATE( pp_cache[i]->b_junk );
+        pp_cache[i]->b_used = VLC_FALSE;
+
+        if( pp_cache[i]->b_junk ) continue;
+
+        pp_cache[i]->p_module = vlc_module_create( p_this );
+
+        /* Load additional infos */
+        LOAD_STRING( pp_cache[i]->p_module->psz_object_name );
+        LOAD_STRING( pp_cache[i]->p_module->psz_shortname );
+        LOAD_STRING( pp_cache[i]->p_module->psz_longname );
+        LOAD_STRING( pp_cache[i]->p_module->psz_help );
+        for( j = 0; j < MODULE_SHORTCUT_MAX; j++ )
+        {
+            LOAD_STRING( pp_cache[i]->p_module->pp_shortcuts[j] ); // FIX
+        }
+        LOAD_STRING( pp_cache[i]->p_module->psz_capability );
+        LOAD_IMMEDIATE( pp_cache[i]->p_module->i_score );
+        LOAD_IMMEDIATE( pp_cache[i]->p_module->i_cpu );
+        LOAD_IMMEDIATE( pp_cache[i]->p_module->b_unloadable );
+        LOAD_IMMEDIATE( pp_cache[i]->p_module->b_reentrant );
+        LOAD_IMMEDIATE( pp_cache[i]->p_module->b_submodule );
+
+        /* Config stuff */
+        if( CacheLoadConfig( pp_cache[i]->p_module, file ) != VLC_SUCCESS )
+            goto error;
+
+        LOAD_STRING( pp_cache[i]->p_module->psz_filename );
+
+        LOAD_IMMEDIATE( i_submodules );
+
+        while( i_submodules-- )
+        {
+            module_t *p_module = vlc_submodule_create( pp_cache[i]->p_module );
+            LOAD_STRING( p_module->psz_object_name );
+            LOAD_STRING( p_module->psz_shortname );
+            LOAD_STRING( p_module->psz_longname );
+            LOAD_STRING( p_module->psz_help );
+            for( j = 0; j < MODULE_SHORTCUT_MAX; j++ )
+            {
+                LOAD_STRING( p_module->pp_shortcuts[j] ); // FIX
+            }
+            LOAD_STRING( p_module->psz_capability );
+            LOAD_IMMEDIATE( p_module->i_score );
+            LOAD_IMMEDIATE( p_module->i_cpu );
+            LOAD_IMMEDIATE( p_module->b_unloadable );
+            LOAD_IMMEDIATE( p_module->b_reentrant );
+        }
+    }
+
+    fclose( file );
+    return;
+
+ error:
+
+    msg_Warn( p_this, "plugins cache not loaded (corrupted)" );
+
+    /* TODO: cleanup */
+    p_libvlc_global->p_module_bank->i_loaded_cache = 0;
+
+    fclose( file );
+    return;
+}
+
+
+static int CacheLoadConfig( module_t *p_module, FILE *file )
+{
+    uint32_t i_lines;
+    uint16_t i_size;
+
+    /* Calculate the structure length */
+    LOAD_IMMEDIATE( p_module->i_config_items );
+    LOAD_IMMEDIATE( p_module->i_bool_items );
+
+    LOAD_IMMEDIATE( i_lines );
+
+    /* Allocate memory */
+    if (i_lines)
+    {
+        p_module->p_config =
+            (module_config_t *)calloc( i_lines, sizeof(module_config_t) );
+        if( p_module->p_config == NULL )
+        {
+            p_module->confsize = 0;
+            msg_Err( p_module, "config error: can't duplicate p_config" );
+            return VLC_ENOMEM;
+        }
+    }
+    p_module->confsize = i_lines;
+
+    /* Do the duplication job */
+    for (size_t i = 0; i < i_lines; i++ )
+    {
+        LOAD_IMMEDIATE( p_module->p_config[i] );
+
+        LOAD_STRING( p_module->p_config[i].psz_type );
+        LOAD_STRING( p_module->p_config[i].psz_name );
+        LOAD_STRING( p_module->p_config[i].psz_text );
+        LOAD_STRING( p_module->p_config[i].psz_longtext );
+        LOAD_STRING( p_module->p_config[i].psz_current );
+
+        if (IsConfigStringType (p_module->p_config[i].i_type))
+        {
+            LOAD_STRING (p_module->p_config[i].orig.psz);
+            p_module->p_config[i].value.psz =
+                    (p_module->p_config[i].orig.psz != NULL)
+                        ? strdup (p_module->p_config[i].orig.psz) : NULL;
+            p_module->p_config[i].saved.psz = NULL;
+        }
+        else
+        {
+            memcpy (&p_module->p_config[i].value, &p_module->p_config[i].orig,
+                    sizeof (p_module->p_config[i].value));
+            memcpy (&p_module->p_config[i].saved, &p_module->p_config[i].orig,
+                    sizeof (p_module->p_config[i].saved));
+        }
+
+        p_module->p_config[i].b_dirty = VLC_FALSE;
+
+        p_module->p_config[i].p_lock = &p_module->object_lock;
+
+        if( p_module->p_config[i].i_list )
+        {
+            if( p_module->p_config[i].ppsz_list )
+            {
+                int j;
+                p_module->p_config[i].ppsz_list =
+                    malloc( (p_module->p_config[i].i_list+1) * sizeof(char *));
+                if( p_module->p_config[i].ppsz_list )
+                {
+                    for( j = 0; j < p_module->p_config[i].i_list; j++ )
+                        LOAD_STRING( p_module->p_config[i].ppsz_list[j] );
+                    p_module->p_config[i].ppsz_list[j] = NULL;
+                }
+            }
+            if( p_module->p_config[i].ppsz_list_text )
+            {
+                int j;
+                p_module->p_config[i].ppsz_list_text =
+                    malloc( (p_module->p_config[i].i_list+1) * sizeof(char *));
+                if( p_module->p_config[i].ppsz_list_text )
+                {
+                  for( j = 0; j < p_module->p_config[i].i_list; j++ )
+                      LOAD_STRING( p_module->p_config[i].ppsz_list_text[j] );
+                  p_module->p_config[i].ppsz_list_text[j] = NULL;
+                }
+            }
+            if( p_module->p_config[i].pi_list )
+            {
+                p_module->p_config[i].pi_list =
+                    malloc( (p_module->p_config[i].i_list + 1) * sizeof(int) );
+                if( p_module->p_config[i].pi_list )
+                {
+                    for (int j = 0; j < p_module->p_config[i].i_list; j++)
+                        LOAD_IMMEDIATE( p_module->p_config[i].pi_list[j] );
+                }
+            }
+        }
+
+        if( p_module->p_config[i].i_action )
+        {
+            p_module->p_config[i].ppf_action =
+                malloc( p_module->p_config[i].i_action * sizeof(void *) );
+            p_module->p_config[i].ppsz_action_text =
+                malloc( p_module->p_config[i].i_action * sizeof(char *) );
+
+            for (int j = 0; j < p_module->p_config[i].i_action; j++)
+            {
+                p_module->p_config[i].ppf_action[j] = 0;
+                LOAD_STRING( p_module->p_config[i].ppsz_action_text[j] );
+            }
+        }
+
+        LOAD_IMMEDIATE( p_module->p_config[i].pf_callback );
+    }
+
+    return VLC_SUCCESS;
+
+ error:
+
+    return VLC_EGENERIC;
+}
+
+/*****************************************************************************
+ * SavePluginsCache: saves the plugins cache to a file
+ *****************************************************************************/
+void CacheSave( vlc_object_t *p_this )
+{
+    static char const psz_tag[] =
+        "Signature: 8a477f597d28d172789f06886806bc55\r\n"
+        "# This file is a cache directory tag created by VLC.\r\n"
+        "# For information about cache directory tags, see:\r\n"
+        "#   http://www.brynosaurus.com/cachedir/\r\n";
+
+    char *psz_cachedir;
+    FILE *file;
+    int i, j, i_cache;
+    module_cache_t **pp_cache;
+    int32_t i_file_size = 0;
+    libvlc_global_data_t *p_libvlc_global = vlc_global();
+
+    psz_cachedir = p_this->p_libvlc->psz_cachedir;
+    if( !psz_cachedir ) /* XXX: this should never happen */
+    {
+        msg_Err( p_this, "Unable to get cache directory" );
+        return;
+    }
+
+    char psz_filename[sizeof(DIR_SEP) + 32 + strlen(psz_cachedir)];
+    config_CreateDir( p_this, psz_cachedir );
+
+    snprintf( psz_filename, sizeof( psz_filename ),
+              "%s"DIR_SEP"CACHEDIR.TAG", psz_cachedir );
+    file = utf8_fopen( psz_filename, "wb" );
+    if( file )
+    {
+        fwrite( psz_tag, 1, strlen(psz_tag), file );
+        fclose( file );
+    }
+
+    snprintf( psz_filename, sizeof( psz_filename ),
+              "%s"DIR_SEP"%s", psz_cachedir, CacheName() );
+    msg_Dbg( p_this, "saving plugins cache file %s", psz_filename );
+
+    file = utf8_fopen( psz_filename, "wb" );
+    if( !file )
+    {
+        msg_Warn( p_this, "could not open plugins cache file %s for writing",
+                  psz_filename );
+        return;
+    }
+
+    /* Empty space for file size */
+    fwrite( &i_file_size, sizeof(char), sizeof(i_file_size), file );
+
+    /* Contains version number */
+    fprintf( file, "%s", "cache " COPYRIGHT_MESSAGE );
+
+    /* Sub-version number (to avoid breakage in the dev version when cache
+     * structure changes) */
+    i_file_size = CACHE_SUBVERSION_NUM;
+    fwrite( &i_file_size, sizeof(char), sizeof(i_file_size), file );
+
+    /* Language */
+    fprintf( file, "%5.5s", _("C") );
+
+    /* Header marker */
+    i_file_size = ftell( file );
+    fwrite( &i_file_size, sizeof(char), sizeof(i_file_size), file );
+
+    i_cache = p_libvlc_global->p_module_bank->i_cache;
+    pp_cache = p_libvlc_global->p_module_bank->pp_cache;
+
+    fwrite( &i_cache, sizeof(char), sizeof(i_cache), file );
+
+#define SAVE_IMMEDIATE(a) \
+    fwrite( &a, sizeof(char), sizeof(a), file )
+#define SAVE_STRING(a) \
+    { i_size = a ? strlen( a ) + 1 : 0; \
+      fwrite( &i_size, sizeof(char), sizeof(i_size), file ); \
+      if( a ) fwrite( a, sizeof(char), i_size, file ); \
+    } while(0)
+
+    for( i = 0; i < i_cache; i++ )
+    {
+        uint16_t i_size;
+        uint32_t i_submodule;
+
+        /* Save common info */
+        SAVE_STRING( pp_cache[i]->psz_file );
+        SAVE_IMMEDIATE( pp_cache[i]->i_time );
+        SAVE_IMMEDIATE( pp_cache[i]->i_size );
+        SAVE_IMMEDIATE( pp_cache[i]->b_junk );
+
+        if( pp_cache[i]->b_junk ) continue;
+
+        /* Save additional infos */
+        SAVE_STRING( pp_cache[i]->p_module->psz_object_name );
+        SAVE_STRING( pp_cache[i]->p_module->psz_shortname );
+        SAVE_STRING( pp_cache[i]->p_module->psz_longname );
+        SAVE_STRING( pp_cache[i]->p_module->psz_help );
+        for( j = 0; j < MODULE_SHORTCUT_MAX; j++ )
+        {
+            SAVE_STRING( pp_cache[i]->p_module->pp_shortcuts[j] ); // FIX
+        }
+        SAVE_STRING( pp_cache[i]->p_module->psz_capability );
+        SAVE_IMMEDIATE( pp_cache[i]->p_module->i_score );
+        SAVE_IMMEDIATE( pp_cache[i]->p_module->i_cpu );
+        SAVE_IMMEDIATE( pp_cache[i]->p_module->b_unloadable );
+        SAVE_IMMEDIATE( pp_cache[i]->p_module->b_reentrant );
+        SAVE_IMMEDIATE( pp_cache[i]->p_module->b_submodule );
+
+        /* Config stuff */
+        CacheSaveConfig( pp_cache[i]->p_module, file );
+
+        SAVE_STRING( pp_cache[i]->p_module->psz_filename );
+
+        i_submodule = pp_cache[i]->p_module->i_children;
+        SAVE_IMMEDIATE( i_submodule );
+        for( i_submodule = 0;
+             i_submodule < (unsigned)pp_cache[i]->p_module->i_children;
+             i_submodule++ )
+        {
+            module_t *p_module =
+                (module_t *)pp_cache[i]->p_module->pp_children[i_submodule];
+
+            SAVE_STRING( p_module->psz_object_name );
+            SAVE_STRING( p_module->psz_shortname );
+            SAVE_STRING( p_module->psz_longname );
+            SAVE_STRING( p_module->psz_help );
+            for( j = 0; j < MODULE_SHORTCUT_MAX; j++ )
+            {
+                SAVE_STRING( p_module->pp_shortcuts[j] ); // FIX
+            }
+            SAVE_STRING( p_module->psz_capability );
+            SAVE_IMMEDIATE( p_module->i_score );
+            SAVE_IMMEDIATE( p_module->i_cpu );
+            SAVE_IMMEDIATE( p_module->b_unloadable );
+            SAVE_IMMEDIATE( p_module->b_reentrant );
+        }
+    }
+
+    /* Fill-up file size */
+    i_file_size = ftell( file );
+    fseek( file, 0, SEEK_SET );
+    fwrite( &i_file_size, sizeof(char), sizeof(i_file_size), file );
+
+    fclose( file );
+}
+
+static void CacheSaveConfig( module_t *p_module, FILE *file )
+{
+    uint32_t i_lines = p_module->confsize;
+    uint16_t i_size;
+
+    SAVE_IMMEDIATE( p_module->i_config_items );
+    SAVE_IMMEDIATE( p_module->i_bool_items );
+    SAVE_IMMEDIATE( i_lines );
+
+    for (size_t i = 0; i < i_lines ; i++)
+    {
+        SAVE_IMMEDIATE( p_module->p_config[i] );