- Avoid division by zero in TRACKBAR_GetTicPos

- Manage negative range TRACKBAR_DrawOneTic

- Avoid division by zero in TRACKBAR_GetTicPos
76707020 · Stephan BEUZE · Alexandre Julliard · 2123c137 · 76707020
Commit 76707020 authored Aug 05, 2003 by Stephan BEUZE Committed by Alexandre Julliard Aug 05, 2003
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trackbar.c dlls/comctl32/trackbar.c +2 -1

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--- a/dlls/comctl32/trackbar.c
+++ b/dlls/comctl32/trackbar.c
@@ -442,7 +442,7 @@ TRACKBAR_DrawOneTic (TRACKBAR_INFO *infoPtr, HDC hdc, LONG ticPos, int flags)
    }

    range = infoPtr->lRangeMax - infoPtr->lRangeMin;
-    if (range == 0)
+    if (range <= 0)
      range = 1; /* to avoid division by zero */

    if (flags & TIC_SELECTIONMARK) {
@@ -966,6 +966,7 @@ TRACKBAR_GetTicPos (TRACKBAR_INFO *infoPtr, INT iTic)

    tic   = TRACKBAR_GetTic (infoPtr, iTic);
    range = infoPtr->lRangeMax - infoPtr->lRangeMin;
+    if (range <= 0) range = 1;
    width = infoPtr->rcChannel.right - infoPtr->rcChannel.left;
    pos   = infoPtr->rcChannel.left + (width * tic) / range;