Expose public APIs for converting doubles to signed/unsigned int per ECMA spec (bug 631132, r=bzbarsky).

js/src/jsapi.cpp

@@ -520,6 +520,18 @@ JS_DoubleIsInt32(jsdouble d, jsint *ip)
     return JSDOUBLE_IS_INT32(d, (int32_t *)ip);
 }
 
+JS_PUBLIC_API(int32)
+JS_DoubleToInt32(jsdouble d)
+{
+    return js_DoubleToECMAInt32(d);
+}
+
+JS_PUBLIC_API(uint32)
+JS_DoubleToUint32(jsdouble d)
+{
+    return js_DoubleToECMAUint32(d);
+}
+
 JS_PUBLIC_API(JSBool)
 JS_ValueToECMAInt32(JSContext *cx, jsval v, int32 *ip)
 {

js/src/jsapi.h

@@ -664,6 +664,12 @@ JS_ValueToNumber(JSContext *cx, jsval v, jsdouble *dp);
 extern JS_PUBLIC_API(JSBool)
 JS_DoubleIsInt32(jsdouble d, jsint *ip);
 
+extern JS_PUBLIC_API(int32)
+JS_DoubleToInt32(jsdouble d);
+
+extern JS_PUBLIC_API(uint32)
+JS_DoubleToUint32(jsdouble d);
+
 /*
  * Convert a value to a number, then to an int32, according to the ECMA rules
  * for ToInt32.