mbazaliy / SWRoute

Function hooking in Swift

SWRoute is a tiny Swift wrapper over rd_route(). It allows you to route (hook) quite any function/method with another function/method or even a closure.

If you're curious how it works, check our my blog post „Function hooking in Swift“.

Exported interface

class SwiftRoute {
    class func replace<MethodT>(function targetMethod : MethodT, with replacement : MethodT) -> Int
}

Arguments

Argument	Type (in/out)	Description
function	in	(required) a function/method to override
with	in	(required) any other function/method or closure to overrride a function with

Return value

KERN_SUCCESS (== 0) upon success, > 0 otherwise.

Example usage

(see SWRouteTests/SWRouteTests.swift for more)

class DemoClass {
    func demoMethod(arg: Int) -> Int {
        return (42 + arg);
    }
}

var err = SwiftRoute.replace(function: DemoClass().demoMethod, with: {
    (arg : Int) -> Int in
        return (90 + arg)
})
XCTAssert(err == Int(KERN_SUCCESS), "", file: __FILE__, line: __LINE__)
XCTAssert(DemoClass().demoMethod(arg) == (90 + arg), "", file: __FILE__, line: __LINE__)

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If you found any bug(s) or something, please open an issue or a pull request — I'd appreciate your help! (^,,^)

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Dmitry Rodionov, 2014
[e-mail]