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author | Mark Adler <madler@alumni.caltech.edu> | 2017-01-15 08:22:16 -0800 |
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committer | Mark Adler <madler@alumni.caltech.edu> | 2017-01-15 09:29:40 -0800 |
commit | cbbd20302c6e3fb626bee5bd8b4932524049515c (patch) | |
tree | 91a632d17b1f7596af41e10537872ed02ee87d33 /zlib.h | |
parent | 7d9c9d410a7f8c732fdb0cac2b268659d624a6b6 (diff) | |
download | zlib-cbbd20302c6e3fb626bee5bd8b4932524049515c.tar.gz |
Permit immediate deflateParams changes before any deflate input.
This permits deflateParams to change the strategy and level right
after deflateInit, without having to wait until a header has been
written. The parameters can be changed immediately up until the
first deflate call that consumes any input data.
Diffstat (limited to 'zlib.h')
-rw-r--r-- | zlib.h | 9 |
1 files changed, 5 insertions, 4 deletions
@@ -712,10 +712,11 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, used to switch between compression and straight copy of the input data, or to switch to a different kind of input data requiring a different strategy. If the compression approach (which is a function of the level) or the - strategy is changed, then the input available so far is compressed with the - old level and strategy using deflate(strm, Z_BLOCK). There are three - approaches for the compression levels 0, 1..3, and 4..9 respectively. The - new level and strategy will take effect at the next call of deflate(). + strategy is changed, and if any input has been consumed in a previous + deflate() call, then the input available so far is compressed with the old + level and strategy using deflate(strm, Z_BLOCK). There are three approaches + for the compression levels 0, 1..3, and 4..9 respectively. The new level + and strategy will take effect at the next call of deflate(). If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does not have enough output space to complete, then the parameter change will not |