fix segfault

[carveJwlIkooP6JGAAIwe30JlM.git] / addon.c

diff --git a/addon.c b/addon.c
index 7e03050c9435f8d6e20ffde6314dc77f58e5c147..09cb43bce8271b20043442e0a3d0509e73a6ad70 100644 (file)
--- a/addon.c
+++ b/addon.c
@@ -69,7 +69,10 @@ static u32 addon_match( addon_alias *alias ){
    return 0xffffffff;
 }
 
-static void addon_alias_uid( addon_alias *alias, char buf[76] ){
+/*
+ * Create a string version of addon alias in buf
+ */
+static void addon_alias_uid( addon_alias *alias, char buf[ADDON_UID_MAX] ){
    if( alias->workshop_id ){
       snprintf( buf, 128, "sr%03d-steam-"PRINTF_U64, 
             alias->type, alias->workshop_id );
@@ -80,6 +83,42 @@ static void addon_alias_uid( addon_alias *alias, char buf[76] ){
    }
 }
 
+/*
+ * parse uid to alias. returns 1 if successful
+ */
+static int addon_uid_to_alias( char uid[ADDON_UID_MAX], addon_alias *alias ){
+/*           1
+ * 01234567890123
+ * sr&&&-@@@@@-#*
+ *    |    |   |
+ *  type   |   id
+ *         |
+ *     location
+ */
+   if( strlen(uid) < 13 ) return 0;
+   if( !((uid[0] == 's') && (uid[1] == 'r')) ) return 0;
+
+   char type[4];
+   memcpy( type, uid+2, 3 );
+   type[3] = '\0';
+   alias->type = atoi(type);
+
+   char location[6];
+   memcpy( location, uid+6, 5 );
+   location[5] = '\0';
+
+   if( !strcmp(location,"steam") )
+      alias->workshop_id = atoll( uid+12 );
+   else if( !strcmp(location,"local") ){
+      alias->workshop_id = 0;
+      vg_strncpy( uid+12, alias->foldername, 64, k_strncpy_always_add_null );
+   }
+   else
+      return 0;
+
+   return 1;
+}
+
 static void addon_system_init( void ){
    u32 reg_size   = sizeof(addon_reg)*ADDON_MOUNTED_MAX;
    addon_system.registry = vg_linear_alloc( vg_mem.rtmemory, reg_size );
@@ -678,6 +717,23 @@ static u16 addon_cache_create_viewer( enum addon_type type, u16 reg_id ){
    return cache_id;
 }
 
+static u16 addon_cache_create_viewer_from_uid( enum addon_type type,
+                                               char uid[ADDON_UID_MAX] ){
+   addon_alias q;
+   if( !addon_uid_to_alias( uid, &q ) ) return 0;
+   if( q.type != type ) return 0;
+
+   u32 reg_id = addon_match( &q );
+
+   if( reg_id == 0xffffffff ){
+      vg_warn( "We dont have the addon '%s' installed.\n", uid );
+      return 0;
+   }
+   else {
+      return addon_cache_create_viewer( type, reg_id );
+   }
+}
+
 static void addon_cache_watch( enum addon_type type, u16 cache_id ){
    if( !cache_id ) return;