Please note, this is a STATIC archive of website from 03 Nov 2016, does not collect or store any user information, there is no "phishing" involved.


This article covers features introduced in SpiderMonkey 17

Compare double value and int32_t value.


JS_DoubleIsInt32(double d, int32_t *ip);
Name Type Description
d double A double value to compare
ip int32_t * A pointer to int32_t value to compare


JS_DoubleIsInt32 returns true if d i sequal to *ip.

(comment from mozilla::NumberEqualsInt32) Casting a floating-point value that doesn't truncate to int32_t, to int32_t, induces undefined behavior. We should definitely fix this (bug 744965), but as apparently it "works" in practice, it's not a pressing concern now.

See Also

Document Tags and Contributors

 Contributors to this page: arai, Sheppy, markg
 Last updated by: arai,