filetree.c move static and stack allocated buffers around

it makes more sense to make the main buffer static and make the
second (infrequently needed) buffer as stack allocated

Change-Id: Ide7c1a7a312124e47a23ed0ab75a90d7b8be982e

3 files changed, 17 insertions, 15 deletions

diff --git a/apps/filetree.c b/apps/filetree.c
index 5c6443cc34..66e4a68398 100644
--- a/apps/filetree.c
+++ b/apps/filetree.c
@@ -435,7 +435,8 @@ static void ft_load_font(char *file)
 int ft_enter(struct tree_context* c)
 {
     int rc = GO_TO_PREVIOUS;
-    char buf[MAX_PATH];
+    static char buf[MAX_PATH];
+
     struct entry* file = tree_get_entry_at(c, c->selected_item);
     if (!file)
     {
@@ -634,17 +635,18 @@ int ft_enter(struct tree_context* c)
             case FILE_ATTR_LUA:
             case FILE_ATTR_OPX:
             {
-                char *plugin = buf, *argument = NULL, lua_path[MAX_PATH];
+                char *plugin = buf, *argument = NULL;
+                char plugin_path[MAX_PATH];
                 int ret;
 
                 if ((file_attr & FILE_ATTR_MASK) == FILE_ATTR_LUA) {
-                    snprintf(lua_path, sizeof(lua_path)-1, "%s/lua.rock", VIEWERS_DIR); /* Use a #define here ? */
-                    plugin = lua_path;
+                    snprintf(plugin_path, sizeof(plugin_path)-1, "%s/lua.rock", VIEWERS_DIR); /* Use a #define here ? */
+                    plugin = plugin_path;
                     argument = buf;
                 }
                 else if ((file_attr & FILE_ATTR_MASK) == FILE_ATTR_OPX) {
-                    snprintf(lua_path, sizeof(lua_path)-1, "%s/open_plugins.rock", VIEWERS_DIR); /* Use a #define here ? */
-                    plugin = lua_path;
+                    snprintf(plugin_path, sizeof(plugin_path)-1, "%s/open_plugins.rock", VIEWERS_DIR); /* Use a #define here ? */
+                    plugin = plugin_path;
                     argument = buf;
                 }
 
@@ -685,7 +687,8 @@ int ft_enter(struct tree_context* c)
             default:
             {
                 const char* plugin;
-
+                char plugin_path[MAX_PATH];
+                const char *argument = buf;
                 if (global_settings.party_mode && audio_status()) {
                     splash(HZ, ID2P(LANG_PARTY_MODE));
                     break;
@@ -698,10 +701,10 @@ int ft_enter(struct tree_context* c)
                     return rc;
                 }
 
-                plugin = filetype_get_plugin(file);
+                plugin = filetype_get_plugin(file, plugin_path, sizeof(plugin_path));
                 if (plugin)
                 {
-                    switch (plugin_load(plugin,buf))
+                    switch (plugin_load(plugin, argument))
                     {
                         case PLUGIN_USB_CONNECTED:
                             rc = GO_TO_FILEBROWSER;
diff --git a/apps/filetypes.c b/apps/filetypes.c
index 530ab18683..3724f57a9b 100644
--- a/apps/filetypes.c
+++ b/apps/filetypes.c
@@ -531,17 +531,16 @@ int filetype_get_icon(int attr)
     return filetypes[index].icon;
 }
 
-char* filetype_get_plugin(const struct entry* file)
+char* filetype_get_plugin(const struct entry* file, char *buffer, size_t buffer_len)
 {
-    static char plugin_name[MAX_PATH];
     int index = find_attr(file->attr);
-    if (index < 0)
+    if (index < 0 || !buffer)
         return NULL;
     if (filetypes[index].plugin == NULL)
         return NULL;
-    snprintf(plugin_name, MAX_PATH, "%s/%s.%s", 
+    snprintf(buffer, buffer_len, "%s/%s.%s", 
              PLUGIN_DIR, filetypes[index].plugin, ROCK_EXTENSION);
-    return plugin_name;
+    return buffer;
 }
 
 bool filetype_supported(int attr)
diff --git a/apps/filetypes.h b/apps/filetypes.h
index 23f259b3ca..efe9f3f5df 100644
--- a/apps/filetypes.h
+++ b/apps/filetypes.h
@@ -73,7 +73,7 @@ int filetype_get_color(const char* name, int attr);
 #endif
 int filetype_get_icon(int attr);
 /* return the plugin filename associated with the file */
-char* filetype_get_plugin(const struct entry* file);
+char* filetype_get_plugin(const struct entry* file, char *buffer, size_t buffer_len);
 
 /* returns true if the attr is supported */
 bool  filetype_supported(int attr);