Adobe Extending Flash Professional CS5 - Manual (Page 559)

537 EXTENDING FLASH PROFESSIONAL
C-Level Extensibility
Last updated 5/2/2011
Arguments
JSContext *cx, jsval v, double *dp
• The cx argument is the opaque JSContext pointer that passed to the JavaScript function.
• The v argument is the jsval structure from which the double is to be extracted.
• The dp argument is a pointer to an 8-byte double. This function stores the converted value in *dp .
Returns
A Boolean value:
JS_TRUE indicates success; JS_FALSE indicates failure.
JSBool JS_ValueToBoolean()
Usage
JSBool JS_ValueToBoolean(JSContext *cx, jsval v, JSBool *bp);
Description
Method; extracts a function argument from a
jsval structure, converts it to a Boolean value (if possible), and passes
the converted value back to the caller.
Arguments
JSContext *cx, jsval v, JSBool *bp
• The cx argument is the opaque JSContext pointer that passes to the JavaScript function.
• The v argument is the jsval structure from which the Boolean value is to be extracted.
• The bp argument is a pointer to a JSBool Boolean value. This function stores the converted value in *bp .
Returns
A Boolean value:
JS_TRUE indicates success; JS_FALSE indicates failure.
JSBool JS_ValueToObject()
Usage
JSBool JS_ValueToObject(JSContext *cx, jsval v, JSObject **op);
Description
Method; extracts a function argument from a
jsval structure, converts it to an object (if possible), and passes the
converted value back to the caller. If the object is an array, use JS_GetArrayLength() and JS_GetElement() to read
its contents.
Arguments
JSContext *cx, jsval v, JSObject **op
• The cx argument is the opaque JSContext pointer that passes to the JavaScript function.
• The v argument is the jsval structure from which the object is to be extracted.
• The op argument is a pointer to a JSObject pointer. This function stores the converted value in *op .