42_KFS/libbozo/src/stdlib/atoll.c

#include "../../headers/ctype.h"

long long atoll(const char *str)
{
	const char *start = str;
	long long ret = 0;

	while (*start != '\0') {
		if (isdigit(*str))
			ret = ret * 10 + *str - '0';
	}
	return ret;
}