Adobe Extending Flash Professional CS4 Uživatelský manuál stáhnout pdf (Strana 553)

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EXTENDING FLASH CS4 PROFESSIONAL

C-Level Extensibility

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.

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