buffers: improve put-buf and fill-buf.

* stream.h (struct strm_ops): put_buf and fill_buf function
pointers get third argument to indicate starting position
of read and write.
(put_buf, fill_buf): Declarations updated.

* stream.c (unimpl_put_buf, unimpl_fill_buf): Third argument
added.
(generic_put_buf, generic_fill_buf, stdio_put_buf,
stdio_fill_buf): Implement position
argument.
(delegate_put_buf, delegate_fill_buf): Take third argument,
pass it down.
(put_buf, fill_buf): New position argument in second position.
Defaulted to zero. Passed down.
(stream_init): Updated registration of put-buf and fill-buf.

* txr.1: Updated documentation.

0 files changed, 0 insertions, 0 deletions