one-line util stuff (kinda)

butils.c

#include <stdio.h>
#include <math.h>

int isLower(char chr) {return chr >= 'a' && chr <= 'z';}
int isUpper(char chr) {return chr >= 'A' && chr <= 'Z';}
int isAlpha(char chr) {return isUpper(chr) || isLower(chr);}
char toLower(char chr) {return isUpper(chr) ? chr - ('A' - 'a') : chr;}
char toUpper(char chr) {return isLower(chr) ? chr + ('A' - 'a') : chr;}
int fib(int n) {return n < 2 ? n ? fib(n - 1) + fib(n - 2);}

// nice seg fault skid lmao
unsigned long long hash(char *str)
{
	unsigned long long h = 0;
	for (int i = 0; i < 8; i++)
	{
		if (*(str + i) == '\0')
		{
			break;
		}
		h += (*(str + i) * pow(sizeof(char) * 8, i));
	}
	return h;
}