ffi_example.swift

let libobjc = dlopen("/usr/lib/libobjc.A.dylib", RTLD_LAZY)!


let i_objc_getClass = FFIFunctionInvocation(symbol: "objc_getClass", handle: libobjc, returnType: .pointer, parameterTypes: [.pointer])

/*do {
    let NSProcessInfo_text = "NSProcessInfo".utf8CString
    var arg0: UnsafePointer<CChar>!
    NSProcessInfo_text.withUnsafeBufferPointer {
        arg0 = $0.baseAddress!
    }
    
    i_objc_getClass.setArgument(&arg0, atIndex: 0)
    
    _NSProcessInfo = i_objc_getClass.invoke()
}*/

var NSString_ptr: Int
var NSString_name = "NSString".utf8CString

var arg_a0: UnsafePointer<CChar>!
NSString_name.withUnsafeBufferPointer { ptr in
    arg_a0 = ptr.baseAddress!
}
i_objc_getClass.setArgument(&arg_a0, atIndex: 0)

//var NSString_ptr: Int = i_objc_getClass.invoke()
NSString_ptr = i_objc_getClass.invoke() as Int


var NSProcessInfo_ptr: Int
var NSProcessInfo_name = "NSProcessInfo".utf8CString

var arg_b0: UnsafePointer<CChar>!
NSProcessInfo_name.withUnsafeBufferPointer { ptr in
    arg_b0 = ptr.baseAddress!
}
i_objc_getClass.setArgument(&arg_b0, atIndex: 0)

NSProcessInfo_ptr = i_objc_getClass.invoke()











let i_class_getName = FFIFunctionInvocation(symbol: "class_getName", handle: libobjc, returnType: .pointer, parameterTypes: [.pointer])

i_class_getName.setArgument(&NSProcessInfo_ptr, atIndex: 0)

let retval: UnsafePointer<CChar> = i_class_getName.invoke()
puts(retval)






//let i_sel_getUid = FFIFunctionInvocation(symbol: "sel_getUid", handle: libobjc, returnType: .pointer, parameterTypes: [.pointer])





var _sel_processInfo = sel_getUid("processInfo")
var _sel_description = sel_getUid("description")
var _sel_UTF8String  = sel_getUid("UTF8String");




let i_objc_msgSend = FFIFunctionInvocation(symbol: "objc_msgSend", handle: libobjc, returnType: .pointer, parameterTypes: [.pointer, .pointer], isVariadic: true)

i_objc_msgSend.setArgument(&NSProcessInfo_ptr, atIndex: 0)
i_objc_msgSend.setArgument(&_sel_processInfo, atIndex: 1)

var processInfo: Int = i_objc_msgSend.invoke()

print("pi", processInfo)


i_objc_msgSend.setArgument(&processInfo, atIndex: 0)
i_objc_msgSend.setArgument(&_sel_description, atIndex: 1)

var desc: Int = i_objc_msgSend.invoke()


i_objc_msgSend.setArgument(&desc, atIndex: 0)
i_objc_msgSend.setArgument(&_sel_UTF8String, atIndex: 1)

var desc_utf8: UnsafePointer<CChar> = i_objc_msgSend.invoke()

puts(desc_utf8)