From 196b770a96920e93dff514b9173d290bf73d0a81 Mon Sep 17 00:00:00 2001
From: Miika Pekkarinen <miipekk@ihme.org>
Date: Sat, 27 May 2006 11:21:08 +0000
Subject: [PATCH] Init dircache after applying settings and use a splash.
 Possible prevent some type of buffer overflow with tagcache.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9997 a1c6a512-1295-4272-9138-f99709370657
---
 apps/main.c     | 37 ++++++++++++++++---------------------
 apps/tagcache.c |  4 ++--
 2 files changed, 18 insertions(+), 23 deletions(-)

diff --git a/apps/main.c b/apps/main.c
index 84c77ab1c9..3878e3a9c4 100644
--- a/apps/main.c
+++ b/apps/main.c
@@ -106,33 +106,25 @@ void init_dircache(void)
     int font_w, font_h;
     int result;
     char buf[32];
+    bool clear = false;
     
     dircache_init();
     if (global_settings.dircache)
     {
-        /* Print "Scanning disk..." to the display. */
-        lcd_getstringsize("A", &font_w, &font_h);
-        lcd_putsxy((LCD_WIDTH/2) - ((strlen(str(LANG_DIRCACHE_BUILDING))*font_w)/2),
-                    LCD_HEIGHT-font_h*3, str(LANG_DIRCACHE_BUILDING));
-        lcd_update();
-
+        if (global_settings.dircache_size == 0)
+        {
+            gui_syncsplash(0, true, str(LANG_DIRCACHE_BUILDING));
+            clear = true;
+        }
+        
         result = dircache_build(global_settings.dircache_size);
         if (result < 0)
+            gui_syncsplash(0, true, "Failed! Result: %d", result);
+        
+        if (clear)
         {
-            snprintf(buf, sizeof(buf),
-                     "Failed! Result: %d",
-                     result);
-            lcd_getstringsize("A", &font_w, &font_h);
-            lcd_putsxy((LCD_WIDTH/2) - ((strlen(buf)*font_w)/2),
-                        LCD_HEIGHT-font_h*2, buf);
-        }
-        else
-        {
-            /* Clean the text when we are done. */
-            lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
-            lcd_fillrect(0, LCD_HEIGHT-font_h*3, LCD_WIDTH, font_h);
-            lcd_set_drawmode(DRMODE_SOLID);
-            lcd_update();
+            backlight_on();
+            show_logo();
         }
     }
 }
@@ -170,7 +162,10 @@ void init_tagcache(void)
     tagtree_init();
 
     if (clear)
+    {
+        backlight_on();
         show_logo();
+    }
 }
 
 #ifdef SIMULATOR
@@ -389,9 +384,9 @@ void init(void)
         settings_load(SETTINGS_ALL);
 
     
-    init_dircache();
     gui_sync_wps_init();
     settings_apply();
+    init_dircache();
     init_tagcache();
 
     status_init();
diff --git a/apps/tagcache.c b/apps/tagcache.c
index 127c6aa63a..f4e139aafa 100644
--- a/apps/tagcache.c
+++ b/apps/tagcache.c
@@ -1427,7 +1427,6 @@ static int build_index(int index_type, struct tagcache_header *h, int tmpfd)
     
     tempbufidx = 0;
     tempbuf_pos = TAGFILE_MAX_ENTRIES * sizeof(struct tempbuf_searchidx);
-    memset(tempbuf+tempbuf_pos, 0, LOOKUP_BUF_DEPTH * sizeof(void **));
     tempbuf_pos += LOOKUP_BUF_DEPTH * sizeof(void **);
     tempbuf_left = tempbuf_size - tempbuf_pos - 8;
     if (tempbuf_left - TAGFILE_ENTRY_AVG_LENGTH * TAGFILE_MAX_ENTRIES < 0)
@@ -1438,6 +1437,7 @@ static int build_index(int index_type, struct tagcache_header *h, int tmpfd)
 
     lookup = (struct tempbuf_searchidx **)
         (tempbuf + sizeof(struct tempbuf_searchidx)*TAGFILE_MAX_ENTRIES);
+    memset(lookup, 0, LOOKUP_BUF_DEPTH * sizeof(void **));
     
     /* Open the index file, which contains the tag names. */
     snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, index_type);
@@ -2024,7 +2024,7 @@ static bool allocate_tagcache(void)
         sizeof(struct ramcache_header) + TAG_COUNT*sizeof(void *);
     logf("tagcache: %d bytes allocated.", stat.ramcache_allocated);
     logf("at: 0x%04x", audiobuf);
-    audiobuf += (long)((stat.ramcache_allocated & ~0x03) + 0x04);
+    audiobuf += (long)((stat.ramcache_allocated & ~0x03) + 128);
 
     return true;
 }