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superclass: object% |
An editor-stream-in-base% object is used by an
editor-stream-in% object to perform low-level reading of
data.
The editor-stream-in-base% class is never instantiated directly, but the derived class editor-stream-in-bytes-base% can be instantiated. New derived classes must override all of the methods described in this section.
Returns #t if there has been an error reading from the
stream, #f otherwise.
method
→ exact-nonnegative-integer? data : (and/c vector? (not immutable?))
Like read-bytes, but fills a supplied
vector with Latin-1 characters instead of filling a byte string. This method
is implemented by default via read-bytes.
method
(send an-editor-stream-in-base read-bytes bstr)
→ exact-nonnegative-integer? bstr : (and/c bytes? (not immutable?))
Reads bytes to fill the supplied byte string. The return value is the
number of bytes read, which may be less than the number
requested if the stream is emptied. If the stream is emptied, the
next call to bad? must return
#t.
Reads a single byte and return it, or returns #f if no more
bytes are available. The default implementation of this method uses
read-bytes.
method
pos : exact-nonnegative-integer?
Moves to the specified absolute position in the stream.
method
n : exact-nonnegative-integer?
Skips past the next n characters in the stream.
method
→ exact-nonnegative-integer?
Returns the current stream position.