Function itoa64

src/fl/stl/charconv.cpp.hpp:103–136

}

int itoa64(i64 value, char *sp, int radix) {
    char tmp[32]; // Buffer for 64-bit integer (max 65 chars for base 2 + sign)
    char *tp = tmp;
    int i;
    u64 v;

    int sign = (radix == 10 && value < 0);
    if (sign)
        v = -static_cast<u64>(value);
    else
        v = static_cast<u64>(value);

    while (v || tp == tmp) {
        i = v % radix;
        v = radix ? v / radix : 0;
        if (i < 10)
            *tp++ = i + '0';
        else
            *tp++ = i + 'a' - 10;
    }

    int len = tp - tmp;

    if (sign) {
        *sp++ = '-';
        len++;
    }

    while (tp > tmp)
        *sp++ = *--tp;

    *sp = '\0';  // Null-terminate the string
    return len;
}

int utoa32(u32 value, char *sp, int radix) {
    char tmp[16]; // be careful with the length of the buffer