Function read [src]
Reads data from the connection into the given buffer.
Prototype
pub fn read(conn: *Connection, buffer: []u8) ReadError!usize Parameters
conn: *Connectionbuffer: []u8 Possible Errors
Source
pub fn read(conn: *Connection, buffer: []u8) ReadError!usize {
const available_read = conn.read_end - conn.read_start;
const available_buffer = buffer.len;
if (available_read > available_buffer) { // partially read buffered data
@memcpy(buffer[0..available_buffer], conn.read_buf[conn.read_start..conn.read_end][0..available_buffer]);
conn.read_start += @intCast(available_buffer);
return available_buffer;
} else if (available_read > 0) { // fully read buffered data
@memcpy(buffer[0..available_read], conn.read_buf[conn.read_start..conn.read_end]);
conn.read_start += available_read;
return available_read;
}
var iovecs = [2]std.posix.iovec{
.{ .base = buffer.ptr, .len = buffer.len },
.{ .base = &conn.read_buf, .len = conn.read_buf.len },
};
const nread = try conn.readvDirect(&iovecs);
if (nread > buffer.len) {
conn.read_start = 0;
conn.read_end = @intCast(nread - buffer.len);
return buffer.len;
}
return nread;
}