#include "header.h"

void int_to_hex_string(uint64_t value, char *out, uint8_t num_digits) {				// num_digits : number of digit of the output, ex 2 for 3FF (1023) -> FF
    for (uint8_t i = 0; i < num_digits; ++i) {
        uint8_t shift = (num_digits - 1 - i) * 4;
        out[i] = INT_TO_HEX_CHAR((value >> shift) & 0x0F);
    }
    out[num_digits] = '\0';
}

void int_to_string_base(uint64_t value, char *buffer, uint8_t base) {				// buffer must have the right size
    if (base < 2 || base > 36) {
        buffer[0] = '\0';															// unsupported base
        return;
    }

    // handle zero case
    if (value == 0) {
        buffer[0] = '0';
        buffer[1] = '\0';
		return;
    }

	uint8_t size = 0;
	uint64_t copy = value;

	while (copy) {
		copy /= base;
		size++;
	}

    buffer[size] = '\0';															// null-terminate the string
    size--;																			// adjust index for last digit

	while (value) {
		uint8_t digit = value % base;
		buffer[size] = digit < 10 ? ('0' + digit) : ('A' + digit - 10);
		value /= base;
		size--;
	}
}