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‘seek’ now accepts ‘SEEK_DATA’ and ‘SEEK_HOLE’ where supported.

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* libguile/ports.c (scm_seek): Let SEEK_DATA and SEEK_HOLE through.
(scm_init_ice_9_ports): Define ‘SEEK_DATA’ and ‘SEEK_HOLE’.
* module/ice-9/ports.scm: Export ‘SEEK_DATA’ and ‘SEEK_HOLE’ when
defined.
* test-suite/tests/ports.test ("size of sparse file")
("SEEK_DATA while on data", "SEEK_DATA while in hole")
("SEEK_HOLE while in hole"): New tests.
* NEWS: Update.
This commit is contained in:
Ludovic Courtès 2024-04-15 19:48:10 +02:00
parent 4a0c2433d9
commit 696acfc9e5
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5 changed files with 119 additions and 10 deletions
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7
NEWS
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@ -30,6 +30,13 @@ and 'never, with 'auto being the default.
This speeds up copying large files a lot while saving the disk space.
** 'seek' can now navigate holes in sparse files
On systems that support it, such as GNU/Linux, the new SEEK_DATA and
SEEK_HOLE values can now be passed to the 'seek' procedure to change
file offset to the next piece of data or to the next hole in sparse
files. See "Random Access" in the manual for details.
* Bug fixes
** (ice-9 suspendable-ports) incorrect UTF-8 decoding