Method Stdio.Buffer()->unread()

Method unread

int(0..)|int(-1..-1) unread(int(0..) n)

Description

Rewind the buffer n bytes.

Returns

This function returns how many more bytes of buffer is available to rewind, or -1 on error.

Note

Unless you add new data to the buffer using any of the add functions you can always rewind.

You can call unread(0) to see how much.