reading_composer: fix slider reading description

When slider values are not initialized or are set to zero,
this can result in division by 0.0 that can give unpredictable
values. Add some checks before division.

Change-Id: Ib269c962519191fcc3699076542ca021228cd1ef

diff --git a/src/reading_composer.c b/src/reading_composer.c
index 1806056fb6643d9c476c339f529279ff73bf88f8..076bb1965f6ac80c84f972673795cd6b869a7a66 100644 (file)
--- a/src/reading_composer.c
+++ b/src/reading_composer.c
@@ -46,7 +46,16 @@ TIZEN_PROD_STATIC void add_slider_description(Eina_Strbuf *buf, AtspiAccessibleR
        int max_val = (int)((rm->upper + add_for_rounding) * mul_for_rounding);
        int min_val = (int)((rm->lower + add_for_rounding) * mul_for_rounding);
 
-       int percent = ((val - min_val) / (double)(abs(max_val - min_val))) * 100;
+       int percent;
+       if (min_val >= max_val)
+               percent = 0;
+       else if (val <= min_val)
+               percent = 0;
+       else if (val >= max_val)
+               percent = 100;
+       else
+               percent = ((val - min_val) / (double)(abs(max_val - min_val))) * 100;
+
        char buf_percent[64] = "\0";
 
        g_snprintf(buf_percent, sizeof(buf_percent), "%d", percent);