//
//  Created by Ofri Wolfus on 13/06/05.
//
//  Copyright (c) 2005 Ofri Wolfus. All rights reserved.
//  Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
//    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
//    * Neither the name of Ofri Wolfus nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#import "OWRuntimePatching.h"
#import <objc/objc-class.h>

//Renames originalSelector instance method of inClass to newSelector.
BOOL renameInstnaceMethod(Class inClass, SEL originalSelector, SEL newSelector) {
	Method method = NULL;
	
	//Look for the method
	method = class_getInstanceMethod(inClass, originalSelector);
	if(method != NULL) {
		//Rename the method
		method->method_name = newSelector;
		return YES;
	}
	else
		return NO;
}

//Renames originalSelector class method of inClass to newSelector.
BOOL renameClassMethod(Class inClass, SEL originalSelector, SEL newSelector) {
	Method method = NULL;
	
	//Look for the method
	method = class_getClassMethod(inClass, originalSelector);
	if(method != NULL) {
		//Rename the method
		method->method_name = newSelector;
		return YES;
	}
	else
		return NO;
}


//Rplaces the IMP of originalSelector instance method of classOne with the imp of newSelector of classTwo.
//Returns the original IMP of originalSelector.
IMP replaceInstanceIMP(Class classOne, SEL originalSelector, Class classTwo, SEL newSelector) {
	Method	originalMethod = NULL;
	Method	newMethod = NULL;
	IMP		originalIMP = NULL;
	
	//Find the original method
	originalMethod = class_getInstanceMethod(classOne, originalSelector);
	//Find the new method
	newMethod = class_getInstanceMethod(classTwo, newSelector);
	
	if(originalMethod != NULL && newMethod != NULL) {
		//Save the original IMP
		originalIMP = originalMethod->method_imp;
		//Replace the IMPs
		originalMethod->method_imp = newMethod->method_imp;
	}
	
	return originalIMP;
}

//Rplaces the IMP of originalSelector class method of classOne with the imp of newSelector of classTwo.
//Returns the original IMP of originalSelector.
IMP replaceClassIMP(Class classOne, SEL originalSelector, Class classTwo, SEL newSelector) {
	Method	originalMethod = NULL;
	Method	newMethod = NULL;
	IMP		originalIMP = NULL;
	
	//Find the original method
	originalMethod = class_getClassMethod(classOne, originalSelector);
	//Find the new method
	newMethod = class_getClassMethod(classTwo, newSelector);
	
	if(originalMethod != NULL && newMethod != NULL) {
		//Save the original IMP
		originalIMP = originalMethod->method_imp;
		//Replace the IMPs
		originalMethod->method_imp = newMethod->method_imp;
	}
	
	return originalIMP;
}