Fix freeze/crash problems when scrolling very long strings (like filenames or tags).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11789 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 4 insertions, 3 deletions

diff --git a/firmware/bidi.c b/firmware/bidi.c
index a6f6b8c5d9..b5851f298e 100644
--- a/firmware/bidi.c
+++ b/firmware/bidi.c
@@ -131,8 +131,8 @@ void arabjoin(unsigned short * stringprt, int length){
 unsigned short *bidi_l2v(const unsigned char *str, int orientation)
 {
     int length = utf8length(str);
-    static unsigned short  utf16_buf[MAX_PATH+1];
-    static unsigned short  bidi_buf[MAX_PATH+1];
+    static unsigned short  utf16_buf[SCROLL_LINE_SIZE];
+    static unsigned short  bidi_buf[SCROLL_LINE_SIZE];
     unsigned short *heb_str, *target, *tmp; // *broken_str
     int block_start, block_end, block_type, block_length, i;
     //long max_chars=0;
diff --git a/firmware/export/lcd.h b/firmware/export/lcd.h
index 1ccbc513d2..3e1ea4430b 100644
--- a/firmware/export/lcd.h
+++ b/firmware/export/lcd.h
@@ -367,9 +367,10 @@ extern void lcd_bitmap_transparent(const fb_data *src, int x, int y,
 /* internal usage, but in multiple drivers */
 #ifdef HAVE_LCD_BITMAP
 #define SCROLL_SPACING 3
+#define SCROLL_LINE_SIZE    (MAX_PATH + LCD_WIDTH/2 + SCROLL_SPACING + 2)
 
 struct scrollinfo {
-    char line[MAX_PATH + LCD_WIDTH/2 + SCROLL_SPACING + 2];
+    char line[SCROLL_LINE_SIZE];
     int len;    /* length of line in chars */
     int width;  /* length of line in pixels */
     int offset;