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The C-level API
The C-level extensibility API consists of the following functions
typedef JSBool (*JSNative)(JSContext *cx, JSObject *obj, unsigned int argc, jsval *argv, jsval *rval)
Description
This function signature describes C-level implementations of JavaScript functions in the following situations:
- cx is a pointer to an opaque JSContext structure, which must be passed to some of the functions in the JavaScript API. This variable holds the interpreter's execution context.
- obj is a pointer to the object in whose context the script executes. While the script is running, the this keyword is equal to this object.
- argc is the number of arguments being passed to the function.
- argv is a pointer to an array of jsvals . The array is argc elements in length.
- rval is a pointer to a single jsval . The function's return value should be written to *rval .
The function returns JS_TRUE upon success or JS_FALSE upon failure. If the function returns JS_FALSE , the current script stops executing and an error message appears.
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