Function base64

src/common/utils.cpp:1660–1685

converts bytes to BASE64 representation

// converts bytes to BASE64 representation
void base64(Firebird::string& b64, const Firebird::UCharBuffer& bin)
{
	b64.erase();
	const unsigned char* f = bin.begin();
	for (int i = bin.getCount(); i > 0; i -= 3, f += 3)
	{
		if (i >= 3)
		{
			const ULONG l = (ULONG(f[0]) << 16) | (ULONG(f[1]) <<  8) | f[2];
			b64 += conv_bin2ascii(l >> 18);
			b64 += conv_bin2ascii(l >> 12);
			b64 += conv_bin2ascii(l >> 6);
			b64 += conv_bin2ascii(l);
		}
		else
		{
			ULONG l = ULONG(f[0]) << 16;
			if (i == 2)
				l |= (ULONG(f[1]) << 8);
			b64 += conv_bin2ascii(l >> 18);
			b64 += conv_bin2ascii(l >> 12);
			b64 += (i == 1 ? '=' : conv_bin2ascii(l >> 6));
			b64 += '=';
		}
	}
}

void random64(Firebird::string& randomValue, FB_SIZE_T length)
{