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Clarify how gzopen() appends in zlib.h comments.

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Mark Adler 2011-10-02 12:09:29 -07:00
parent 00c836e325
commit be959acf80
1 changed files with 7 additions and 0 deletions
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7
zlib.h
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@ -1201,6 +1201,13 @@ ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
written be appended to the file. "+" will result in an error, since reading
and writing to the same gzip file is not supported.
These functions, as well as gzip, will read and decode a sequence of gzip
streams in a file. The append function of gzopen() can be used to create
such a file. (Also see gzflush() for another way to do this.) When
appending, gzopen does not test whether the file begins with a gzip stream,
nor does it look for the end of the gzip streams to begin appending. gzopen
will simply append a gzip stream to the existing file.
gzopen can be used to read a file which is not in gzip format; in this
case gzread will directly read from the file without decompression.