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zlib: clean up some dead code
Cleanup unused `if 0'-ed functions, which have been dead since 2006 (commits87c2ce3b93("lib/zlib*: cleanups") by Adrian Bunk and4f3865fb57("zlib_inflate: Upgrade library code to a recent version") by Richard Purdie): - zlib_deflateSetDictionary - zlib_deflateParams - zlib_deflateCopy - zlib_inflateSync - zlib_syncsearch - zlib_inflateSetDictionary - zlib_inflatePrime Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Sergey Senozhatsky
Linus Torvalds
parent
0f9859ca92
commit
62e7ca5280
3 changed files with 0 additions and 393 deletions
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@ -493,64 +493,6 @@ extern int deflateInit2 (z_streamp strm,
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method). msg is set to null if there is no error message. deflateInit2 does
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not perform any compression: this will be done by deflate().
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*/
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#if 0
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extern int zlib_deflateSetDictionary (z_streamp strm,
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const Byte *dictionary,
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uInt dictLength);
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#endif
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/*
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Initializes the compression dictionary from the given byte sequence
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without producing any compressed output. This function must be called
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immediately after deflateInit, deflateInit2 or deflateReset, before any
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call of deflate. The compressor and decompressor must use exactly the same
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dictionary (see inflateSetDictionary).
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The dictionary should consist of strings (byte sequences) that are likely
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to be encountered later in the data to be compressed, with the most commonly
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used strings preferably put towards the end of the dictionary. Using a
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dictionary is most useful when the data to be compressed is short and can be
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predicted with good accuracy; the data can then be compressed better than
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with the default empty dictionary.
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Depending on the size of the compression data structures selected by
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deflateInit or deflateInit2, a part of the dictionary may in effect be
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discarded, for example if the dictionary is larger than the window size in
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deflate or deflate2. Thus the strings most likely to be useful should be
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put at the end of the dictionary, not at the front.
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Upon return of this function, strm->adler is set to the Adler32 value
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of the dictionary; the decompressor may later use this value to determine
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which dictionary has been used by the compressor. (The Adler32 value
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applies to the whole dictionary even if only a subset of the dictionary is
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actually used by the compressor.)
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deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
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parameter is invalid (such as NULL dictionary) or the stream state is
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inconsistent (for example if deflate has already been called for this stream
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or if the compression method is bsort). deflateSetDictionary does not
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perform any compression: this will be done by deflate().
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*/
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#if 0
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extern int zlib_deflateCopy (z_streamp dest, z_streamp source);
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#endif
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/*
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Sets the destination stream as a complete copy of the source stream.
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This function can be useful when several compression strategies will be
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tried, for example when there are several ways of pre-processing the input
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data with a filter. The streams that will be discarded should then be freed
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by calling deflateEnd. Note that deflateCopy duplicates the internal
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compression state which can be quite large, so this strategy is slow and
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can consume lots of memory.
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deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
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enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
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(such as zalloc being NULL). msg is left unchanged in both source and
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destination.
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*/
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extern int zlib_deflateReset (z_streamp strm);
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/*
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@ -568,27 +510,6 @@ static inline unsigned long deflateBound(unsigned long s)
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return s + ((s + 7) >> 3) + ((s + 63) >> 6) + 11;
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}
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#if 0
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extern int zlib_deflateParams (z_streamp strm, int level, int strategy);
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#endif
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/*
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Dynamically update the compression level and compression strategy. The
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interpretation of level and strategy is as in deflateInit2. This can be
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used to switch between compression and straight copy of the input data, or
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to switch to a different kind of input data requiring a different
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strategy. If the compression level is changed, the input available so far
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is compressed with the old level (and may be flushed); the new level will
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take effect only at the next call of deflate().
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Before the call of deflateParams, the stream state must be set as for
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a call of deflate(), since the currently available input may have to
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be compressed and flushed. In particular, strm->avail_out must be non-zero.
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deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
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stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
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if strm->avail_out was zero.
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*/
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/*
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extern int inflateInit2 (z_streamp strm, int windowBits);
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@ -631,45 +552,6 @@ extern int inflateInit2 (z_streamp strm, int windowBits);
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and avail_out are unchanged.)
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*/
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extern int zlib_inflateSetDictionary (z_streamp strm,
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const Byte *dictionary,
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uInt dictLength);
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/*
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Initializes the decompression dictionary from the given uncompressed byte
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sequence. This function must be called immediately after a call of inflate,
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if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
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can be determined from the adler32 value returned by that call of inflate.
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The compressor and decompressor must use exactly the same dictionary (see
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deflateSetDictionary). For raw inflate, this function can be called
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immediately after inflateInit2() or inflateReset() and before any call of
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inflate() to set the dictionary. The application must insure that the
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dictionary that was used for compression is provided.
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inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
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parameter is invalid (such as NULL dictionary) or the stream state is
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inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
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expected one (incorrect adler32 value). inflateSetDictionary does not
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perform any decompression: this will be done by subsequent calls of
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inflate().
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*/
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#if 0
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extern int zlib_inflateSync (z_streamp strm);
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#endif
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/*
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Skips invalid compressed data until a full flush point (see above the
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description of deflate with Z_FULL_FLUSH) can be found, or until all
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available input is skipped. No output is provided.
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inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
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if no more input was provided, Z_DATA_ERROR if no flush point has been found,
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or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
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case, the application may save the current current value of total_in which
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indicates where valid compressed data was found. In the error case, the
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application may repeatedly call inflateSync, providing more input each time,
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until success or end of the input data.
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*/
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extern int zlib_inflateReset (z_streamp strm);
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/*
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This function is equivalent to inflateEnd followed by inflateInit,
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