ref: a7aae8f84b13e63661a445b50e89703e315e79d1
parent: e8dad5a39e2622074659ef68f02ecf2f9f2451bd
author: Tor Andersson <tor.andersson@artifex.com>
date: Wed Jul 5 09:23:44 EDT 2017
Clamp to INT_MIN/INT_MAX explicitly in jsV_numbertointeger. Don't rely on undefined behaviour casting Infinity or out of range doubles to integer.
--- a/jsvalue.c
+++ b/jsvalue.c
@@ -9,10 +9,12 @@
int jsV_numbertointeger(double n)
{
- double sign = n < 0 ? -1 : 1;
+ if (n == 0) return 0;
if (isnan(n)) return 0;
- if (n == 0 || isinf(n)) return n;
- return sign * floor(fabs(n));
+ n = (n < 0) ? -floor(-n) : floor(n);
+ if (n < INT_MIN) return INT_MIN;
+ if (n > INT_MAX) return INT_MAX;
+ return (int)n;
}
int jsV_numbertoint32(double n)