This article covers features introduced in SpiderMonkey 17
Compare double value and int32_t value.
Syntax
bool 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 |
Description
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.