JSBool JS_ValueToObject()

Description

Extracts a function argument from a jsval , 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

• cx is the opaque JSContext pointer that passed to the JavaScript function.
• v is the jsval from which the object is to be extracted.
• op is a pointer to a ( JSObject * ). This function stores the converted value in *op .

Returns

A Boolean value that indicates success ( JS_TRUE ) or failure ( JS_FALSE ).

JSBool JS_StringToValue()

Description

Stores a string return value in a jsval. It allocates a new JavaScript string object.

Arguments

JSContext *cx , char *bytes , size_t sz , jsval *vp

• cx is the opaque JSContext pointer that passed to the JavaScript function.
• bytes is the string to be stored in the jsval . The string data is copied, so the caller should free the string when it is no longer needed. If the string size is not specified (see the sz argument), the string must be null-terminated.
• sz is the size of the string, in bytes. If sz is 0, the length of the null-terminated string is computed automatically.
• vp is a pointer to the jsval into which the contents of the string should be copied.

Returns

A Boolean value that indicates success ( JS_TRUE ) or failure ( JS_FALSE ).

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