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| author | Ludovic Courtès <ludo@gnu.org> | 2016-07-27 11:44:34 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2016-07-27 12:45:01 +0200 |
| commit | d00240c36e7bcf73f63e9e21c6ecec6f86d354ab (patch) | |
| tree | 72ae3809692a65691dd5bfe23ecc2f5d728e70a7 | |
| parent | 46bd451520d7a318e8b52a4a500d146403b8dcb8 (diff) | |
| download | patches-d00240c36e7bcf73f63e9e21c6ecec6f86d354ab.tar patches-d00240c36e7bcf73f63e9e21c6ecec6f86d354ab.tar.gz | |
zlib: Clarify when 'gzread!' can return zero.
* guix/zlib.scm (gzread!): Augment docstring to clarify when zero is
returned (based on reading zlib code).
(make-gzip-input-port)[read!]: Remove scary comment.
| -rw-r--r-- | guix/zlib.scm | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/guix/zlib.scm b/guix/zlib.scm index 51e5e9e426..40f5294ceb 100644 --- a/guix/zlib.scm +++ b/guix/zlib.scm @@ -92,7 +92,8 @@ closes FD." (let ((proc (zlib-procedure int "gzread" (list '* '* unsigned-int)))) (lambda* (gzfile bv #:optional (start 0) (count (bytevector-length bv))) "Read up to COUNT bytes from GZFILE into BV at offset START. Return the -number of uncompressed bytes actually read." +number of uncompressed bytes actually read; it is zero if COUNT is zero or if +the end-of-stream has been reached." (let ((ret (proc (gzip-file->pointer gzfile) (bytevector->pointer bv start) count))) @@ -172,7 +173,6 @@ buffer increases decompression speed." (gzdopen (fileno port) "r")) (define (read! bv start count) - ;; XXX: Can 'gzread!' return zero even though we haven't reached the EOF? (gzread! gzfile bv start count)) (unless (= buffer-size %default-buffer-size) |