Jeremy Legendre jslegendre

All about that NSLife

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jslegendre / argToCFString.c

Created February 3, 2018 05:18

Create CFString from CLI arguments in C

	/***************************
	Compile with:
	gcc -framework CoreFoundation
	****************************/

	#include <CoreFoundation/CoreFoundation.h>

	int main(int argc, char** argv) {
	CFStringRef myCFString = CFStringCreateWithCString(NULL, argv[1], kCFStringEncodingMacRoman);
	/* Use myCFString */

jslegendre / class_printMethods.m

Created January 13, 2018 00:27

Print all methods of a class

	void class_printMethods(Class cl) {
	unsigned int methodCount = 0;
	Method *methods = class_copyMethodList(cl, &methodCount);
	printf("Methods for %s: \n", class_getName(cl));
	for (int i = 0; i < methodCount; i++) {
	Method method = methods[i];
	printf("%s : %s \n",
	sel_getName(method_getName(method)),
	method_getTypeEncoding(method));
	}

jslegendre / class_printProperties.m

Created January 13, 2018 00:26

Console log all properties of a class

	void class_printProperties(Class cl) {
	unsigned int propCount;
	objc_property_t *props = class_copyPropertyList(cl, &propCount);
	printf("Properties for %s: \n", class_getName(cl));
	for (int i = 0; i < propCount; i++) {
	objc_property_t prop = props[i];
	printf("%s : %s \n",
	property_getName(prop),
	property_getAttributes(prop));
	}

jslegendre / class_printIvars.m

Created January 13, 2018 00:22

A function to quickly write a list of the instance variables of a class to the console.

	void class_printIvars(Class cl) {
	unsigned int ivarCount;
	Ivar *ivars = class_copyIvarList(cl, &ivarCount);
	printf("Ivars for %s: \n", class_getName(cl));
	for (int i = 0; i < ivarCount; i++) {
	Ivar ivar = ivars[i];
	printf("%s : %s \n",
	ivar_getName(ivar),
	ivar_getTypeEncoding(ivar));
	}

jslegendre / class_getIvarFromString.m

Last active January 13, 2018 00:12

Natively, the objective-c runtime does not have a function to get an instance variable by name so I wrote a function to do so. This works great for inspecting 'concrete' classes.

	Ivar class_getIvarFromString(Class cl, NSString *__ivar) {
	unsigned int count;
	Ivar *ivars = class_copyIvarList(cl, &count);
	for (int i = 0; i < count; i++) {
	Ivar ivar = ivars[i];
	NSString *ivarName = [NSString stringWithUTF8String:ivar_getName(ivar)];
	if([ivarName isEqualToString:__ivar]) {
	free(ivars);
	return ivar;
	}

jslegendre / wavplot.py

Last active November 29, 2017 03:07

WAV to Plot from scratch in Python. I know this can be done using SciPy or various other libraries but I wanted to learn more about wav data so I did this from scratch. Added bonus to doing this myself is that I could specify how accurately I wanted the data to be in order to speed up time on large files. Currently, this only works on 16bit mono…

	import os
	import sys
	import numpy as np
	import struct
	import warnings

	path="sample.wav"
	#get the file size in bytes
	fileSize=os.path.getsize(path)