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Fix overflow in Fl_Valuator::precision(int) to 0...9 (STR #3280).

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git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11317 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Albrecht Schlosser 2016-03-08 13:48:30 +00:00
parent ca54afe5f4
commit ad230031f5
1 changed files with 12 additions and 3 deletions
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15
src/Fl_Valuator.cxx
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@ -51,10 +51,19 @@ void Fl_Valuator::step(double s) {
while (fabs(s-A/B) > epsilon && B<=(0x7fffffff/10)) {B *= 10; A = rint(s*B);}
}
/** Sets the step value to 1/10<SUP>digits</SUP>.*/
void Fl_Valuator::precision(int p) {
/** Sets the step value to 1.0 / 10<SUP>digits</SUP>.
Precision \p digits is limited to 0...9 to avoid internal overflow errors.
Values outside this range are clamped.
\note For negative values of \p digits the step value is set to
\p A = 1.0 and \p B = 1, i.e. 1.0/1 = 1.
*/
void Fl_Valuator::precision(int digits) {
if (digits > 9) digits = 9;
else if (digits < 0) digits = 0;
A = 1.0;
for (B = 1; p--;) B *= 10;
for (B = 1; digits--;) B *= 10;
}
/** Asks for partial redraw */
void Fl_Valuator::value_damage() {damage(FL_DAMAGE_EXPOSE);} // by default do partial-redraw