fn readAtLeast(self: Self, buffer: []u8, len: usize) Error!usize

Returns the number of bytes read, calling the underlying read function the minimal number of times until the buffer has at least len bytes filled. If the number read is less than len it means the stream reached the end. Reaching the end of the stream is not an error condition.

Parameters

self: Self,
buffer: []u8,
len: usize,