#include <stdbool.h>
#include "string.h"

void* memcpy(void* restrict dstptr, const void* restrict srcptr, int size)
{
	unsigned char* dst = (unsigned char*) dstptr;
	const unsigned char* src = (const unsigned char*) srcptr;
	for ( int i = 0; i < size; i++ )
		dst[i] = src[i];
	return dstptr;
}

// extra function for non-null terminated 
// length 0 for null terminated strings;
int strcmp_l(char *str1, char *str2, int length)
{
    int i=0;
    while(true)
    {

	if(str1[i]!=str2[i])return str1[i]-str2[i];
	i++;
	if(i==length) return 0;
	
	if( length==0 && (str1[i]==0 || str2[i]==0 ) )
	    return str1[i]-str2[i];

    }

}

strcmp(char *str1, char *str2)
{
    return strcmp_l(str1,str2,0);
}

int strlen(const char* string)
{
	int result = 0;
	while ( string[result] )result++;
	return result;
}