// Each duration attribute needs to be converted to zigzag form. Use an array to make it

// easy to do the same encoding ops on all three values.

uint64_t zigzag_values[3];

// We need vint sizes for each attribute.

size_t vint_sizes[3];

zigzag_values[0] = cass::encode_zig_zag(value.months);

zigzag_values[1] = cass::encode_zig_zag(value.days);

zigzag_values[2] = cass::encode_zig_zag(value.nanos);

// We also need the total size of all three vint's.

size_t data_size = 0;

for (int i = 0; i < 3; ++i) {

vint_sizes[i] = cass::vint_size(zigzag_values[i]);

data_size += vint_sizes[i];

}

// Allocate our data buffer and then start populating it. If we're including the length,

// allocate extra space for that.

Buffer buf(with_length ? sizeof(int32_t) + data_size : data_size);

// Write the length if with_length is set; this means subsequent data is written afterwards

// in buf. Use pos to set our next write position properly regardless of with_length. Since we

// don't write sequentially to the buffer (we jump around a bit) the easiest thing to do is grab

// a pointer to the underlying data buffer and manipulate it.

size_t pos = with_length ? buf.encode_int32(0, data_size) : 0;

char* cur_byte = buf.data() + pos;

for (int i = 0; i < 3; ++i) {

cur_byte = encode_vint(cur_byte, zigzag_values[i], vint_sizes[i]);

}

return buf;