Adobe Extending Dreamweaver CS4 Manuale Utente Scaricare il pdf (Pagina 362)

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EXTENDING DREAMWEAVER CS4

C-level extensibility

long JS_GetArrayLength()

Description

Given a pointer to an array object, this function gets the number of elements in the array.

Arguments

JSContext *cx, JSObject*obj

• The cx argument is the opaque JSContext pointer that passes to the JavaScript function.

• The obj argument is a pointer to an array object.

Returns

The number of elements in the array or -1 upon failure.

JSBool JS_GetElement()

Description

This function reads a single element of an array object.

Arguments

JSContext *cx, JSObject *obj, unsigned int index, JSVal *v

• The cx argument is the opaque JSContext pointer that passes to the JavaScript function.

• The obj argument is a pointer to an array object.

• The index argument is an integer index into the array. The first element is index0, and the last element is index

(

length - 1).

• The v argument is a pointer to a jsval where the contents of the JSVal structure in the array should be copied.

Returns

A Boolean value: JS_TRUE indicates success; JS_FALSE indicates failure.

JSBool JS_SetElement()

Description

This function writes a single element of an array object.

Arguments

JSContext *cx, JSObject *obj, unsigned int index, JSVal *v

• The cx argument is the opaque JSContext pointer that passes to the JavaScript function.

• The obj argument is a pointer to an array object.

• The index argument is an integer index into the array. The first element is index0, and the last element is index

(

length - 1).

• The v argument is a pointer to a JSVal structure whose contents should be copied to the JSVal in the array.

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Adobe Extending Dreamweaver CS4 Manuale Utente Pagina 362