Open Plugins search by langids

On language change Stored plugins may fail to run due
to hashing on lang dependent string

allows searching by langid when the supplied key is LANG_PTR

Fixes error on hash flush where previous entry was not restored

Adds routine to update file in-place (for ATA targets)
Other targets make a temp file to copy entries

breaking changes:
ROCKBOXDIR is no longer hashed since
/.rockbox directory may soon be able to be changed
packed attribute added to op data structure -- oops

Change-Id: Ieead26609559b9c5bdadc6a95227cb2bfbb9f71c

1 files changed, 12 insertions, 1 deletions

diff --git a/apps/open_plugin.h b/apps/open_plugin.h
index 8c09c4ac58..e1d49bf329 100644
--- a/apps/open_plugin.h
+++ b/apps/open_plugin.h
@@ -32,17 +32,28 @@
 #ifndef __PCTOOL__
 /* open_plugin path lookup */
 #define OPEN_PLUGIN_DAT PLUGIN_DIR "/plugin.dat"
+#define OPEN_RBPLUGIN_DAT PLUGIN_DIR "/rb_plugins.dat"
 #define OPEN_PLUGIN_BUFSZ MAX_PATH
 #define OPEN_PLUGIN_NAMESZ 32
+
+enum {
+    OPEN_PLUGIN_LANG_INVALID    = (-1),
+    OPEN_PLUGIN_LANG_IGNORE     = (-2),
+    OPEN_PLUGIN_LANG_IGNOREALL  = (-3),
+    OPEN_PLUGIN_NOT_FOUND     = (-1),
+    OPEN_PLUGIN_NEEDS_FLUSHED = (-2)
+};
+
 struct open_plugin_entry_t
 {
+/* hash and lang_id need to be the first items */
     uint32_t hash;
     int32_t  lang_id;
     char name[OPEN_PLUGIN_NAMESZ+1];
     /*char key[OPEN_PLUGIN_BUFSZ+1];*/
     char path[OPEN_PLUGIN_BUFSZ+1];
     char param[OPEN_PLUGIN_BUFSZ+1];
-};
+}__attribute__((packed));
 
 inline static void open_plugin_get_hash(const char *key, uint32_t *hash)
 {