Function str_base64

src/base/str.cpp:688–738

}

void str_base64(char *dst, int dst_size, const void *data_raw, int data_size)
{
	static const char DIGITS[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

	const unsigned char *data = (const unsigned char *)data_raw;
	unsigned value = 0;
	int num_bits = 0;
	int i = 0;
	int o = 0;

	dst_size -= 1;
	dst[dst_size] = 0;
	while(true)
	{
		if(num_bits < 6 && i < data_size)
		{
			value = (value << 8) | data[i];
			num_bits += 8;
			i += 1;
		}
		if(o == dst_size)
		{
			return;
		}
		if(num_bits > 0)
		{
			unsigned padded;
			if(num_bits >= 6)
			{
				padded = (value >> (num_bits - 6)) & 0x3f;
			}
			else
			{
				padded = (value << (6 - num_bits)) & 0x3f;
			}
			dst[o] = DIGITS[padded];
			num_bits -= 6;
			o += 1;
		}
		else if(o % 4 != 0)
		{
			dst[o] = '=';
			o += 1;
		}
		else
		{
			dst[o] = 0;
			return;
		}
	}
}

static int base64_digit_value(char digit)
{