Comments (5)
The behavior of (setf flexi-stream-position) isn't documented anywhere. You should use FILE-POSITION.
from flexi-streams.
Hi. Thanks for a quick response. file-position
does not report correct flexi-stream position after peek-byte
, nor does it set the correct position. This is per documentation, I think, "FILE-POSITION for flexi streams will work as if the function had been applied to the underlying stream." Suppose I'm reading in a file, use peek-byte
at times, and then I want to shift the position in the flexi-stream. Neither flexi-stream-position
nor file-position
can currently do it, I think.
from flexi-streams.
Is the issue with double buffering? I.e. file-position should clear the flexi-stream buffer of unread bytes?
from flexi-streams.
Suppose I am reading a stream, using peek-byte
sometimes, and now I want to jump back a number of bytes. If file-position
would clear the buffer of unread bytes, I can do that, but the code will look counterintuitive. First, read the current position with flexi-stream-position
. Second, set the new position with file-position
. Would it not be more intuitive to use (setf (flexi-stream-position) ...)
for that?
I'm not at all familiar with flexi-stream, just started playing with it this week. What I was looking for is to have peek-byte
functionality and the ability to move back and forth within the stream, like it exists with file-position
in standard streams. Well, (setf (flexi-stream-position) ...)
is at least listed in the documentation, so I gave it a spin, but it does something different. I don't have a strong opinion on how best to implement the functionality I discuss.
from flexi-streams.
flexi-stream-position is not really properly documented, so the most intuitive thing would be not to have it and only rely on file-position. Which, at the moment, doesn't play well with the buffering that flexi-streams is performing.
from flexi-streams.
Related Issues (20)
- Support for Java's "modified" UTF-8
- flexi-stream not of type stream on ABCL HOT 4
- Warnings issued when building with SBCL
- flexi-streams.asd defines multiple ASDF system definitions HOT 28
- Probably, an error in octets-to-string HOT 2
- Probably, an error in octets-to-string HOT 10
- How do convert to a string or byte array? HOT 1
- Building with SBCL HOT 1
- flexi-stream-position not updated after read-sequence
- flexi-stream-position not supported for vector-input-stream
- Undefined STREAM var? HOT 1
- README mentions CL-INTERPOL
- peek-char method of flexi-streams:in-memory-stream HOT 2
- :POSITION/:BOUND broken on current Quicklisp version HOT 12
- string output stream? HOT 9
- Pathname from stream HOT 1
- Trying to write octets to a flexi-stream fails. HOT 4
- Poor performance? HOT 16
- Tests broken on SBCL 2.4.4 HOT 2
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from flexi-streams.