kc3-lang/libxml2/result/XPath/expr/functions
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Hash : 4bebb030
Author :
Date : 2016-04-21T13:41:09
Rework XPath rounding functions Use the C library's floor and ceil functions. The old code was overly complicated for no apparent reason and could result in undefined behavior when handling NaNs (found with afl-fuzz and UBSan). Fix wrong comment in xmlXPathRoundFunction. The implementation was already following the spec and rounding half up.
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result/XPath/expr/functions
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======================== Expression: true() Object is a Boolean : true ======================== Expression: false() Object is a Boolean : false ======================== Expression: number("1.5") Object is a number : 1.5 ======================== Expression: number('abc') Object is a number : NaN ======================== Expression: -number('abc') Object is a number : NaN ======================== Expression: floor(0.1) Object is a number : 0 ======================== Expression: floor(-0.1) Object is a number : -1 ======================== Expression: floor(-0) Object is a number : 0 ======================== Expression: floor(0) Object is a number : 0 ======================== Expression: floor(5.2) Object is a number : 5 ======================== Expression: floor(-5.2) Object is a number : -6 ======================== Expression: floor(100000000000000000000) Object is a number : 1e+20 ======================== Expression: floor(-100000000000000000000) Object is a number : -1e+20 ======================== Expression: floor(0 div 0) Object is a number : NaN ======================== Expression: floor(1 div 0) Object is a number : Infinity ======================== Expression: floor(-1 div 0) Object is a number : -Infinity ======================== Expression: ceiling(0.1) Object is a number : 1 ======================== Expression: ceiling(-0.1) Object is a number : 0 ======================== Expression: ceiling(-0) Object is a number : 0 ======================== Expression: ceiling(0) Object is a number : 0 ======================== Expression: ceiling(5.2) Object is a number : 6 ======================== Expression: ceiling(-5.2) Object is a number : -5 ======================== Expression: ceiling(100000000000000000000) Object is a number : 1e+20 ======================== Expression: ceiling(-100000000000000000000) Object is a number : -1e+20 ======================== Expression: ceiling(0 div 0) Object is a number : NaN ======================== Expression: ceiling(1 div 0) Object is a number : Infinity ======================== Expression: ceiling(-1 div 0) Object is a number : -Infinity ======================== Expression: round(0.1) Object is a number : 0 ======================== Expression: round(5.2) Object is a number : 5 ======================== Expression: round(5.5) Object is a number : 6 ======================== Expression: round(5.6) Object is a number : 6 ======================== Expression: round(-0.1) Object is a number : 0 ======================== Expression: round(-5.2) Object is a number : -5 ======================== Expression: round(-5.5) Object is a number : -5 ======================== Expression: round(-5.6) Object is a number : -6 ======================== Expression: round(0.5) Object is a number : 1 ======================== Expression: round(-0.5) Object is a number : 0 ======================== Expression: round(100000000000000000000) Object is a number : 1e+20 ======================== Expression: round(-100000000000000000000) Object is a number : -1e+20 ======================== Expression: round(0 div 0) Object is a number : NaN ======================== Expression: round(1 div 0) Object is a number : Infinity ======================== Expression: round(-1 div 0) Object is a number : -Infinity