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DoubleToRational(): avoid casting NaN to uint32 (fixes #227)

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Even Rouault 2020-12-12 15:31:05 +01:00
parent 39d6c91ffd
commit 9a935c7e23
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GPG Key ID: 33EBBFC47B3DD87D
1 changed files with 2 additions and 1 deletions
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libtiff/tif_dirwrite.c
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@ -2826,7 +2826,8 @@ void DoubleToRational(double value, uint32 *num, uint32 *denom)
unsigned long long ullNum, ullDenom, ullNum2, ullDenom2; unsigned long long ullNum, ullDenom, ullNum2, ullDenom2;
/*-- Check for negative values. If so it is an error. */ /*-- Check for negative values. If so it is an error. */
if (value < 0) { /* Test written that way to catch NaN */
if (!(value >= 0)) {
*num = *denom = 0; *num = *denom = 0;
TIFFErrorExt(0, "TIFFLib: DoubleToRational()", " Negative Value for Unsigned Rational given."); TIFFErrorExt(0, "TIFFLib: DoubleToRational()", " Negative Value for Unsigned Rational given.");
return; return;