1. 16 1月, 2017 1 次提交
  2. 03 1月, 2017 3 次提交
  3. 02 1月, 2017 1 次提交
  4. 01 1月, 2017 1 次提交
  5. 31 12月, 2016 2 次提交
  6. 04 12月, 2016 3 次提交
    • M
      Speed up deflation for level 0 (storing). · 9dc5a858
      Mark Adler 提交于
      The previous code slid the window and the hash table and copied
      every input byte three times in order to just write the data as
      stored blocks with no compression. This commit minimizes sliding
      and copying, especially for large input and output buffers.
      
      Level 0 compression is now more than 20 times faster than before
      the commit.
      
      Most of the speedup is due to deferring hash table slides until
      deflateParams() is called to change the compression level away
      from 0. More speedup is due to copying directly from next_in to
      next_out when the amounts of available input data and output space
      permit it, avoiding the intermediate pending buffer. Additionally,
      only the last 32K of the used input data is copied back to the
      sliding window when large input buffers are provided.
      9dc5a858
    • M
      Assure that deflateParams() will not switch functions mid-block. · 7161ad76
      Mark Adler 提交于
      This alters the specification in zlib.h, so that deflateParams()
      will not change any parameters if there is not enough output space
      in the event that a block is emitted in order to allow switching
      the compression function.
      7161ad76
    • M
      Fix bugs in creating a very large gzip header. · 9674807c
      Mark Adler 提交于
      9674807c
  7. 30 10月, 2016 1 次提交
  8. 28 10月, 2016 1 次提交
    • M
      Fix bug when level 0 used with Z_HUFFMAN or Z_RLE. · 94575859
      Mark Adler 提交于
      Compression level 0 requests no compression, using only stored
      blocks. When Z_HUFFMAN or Z_RLE was used with level 0 (granted,
      an odd choice, but permitted), the resulting blocks were mostly
      fixed or dynamic. The reason is that deflate_stored() was not
      being called in that case. The compressed data was valid, but it
      was not what the application requested. This commit assures that
      only stored blocks are emitted for compression level 0, regardless
      of the strategy selected.
      94575859
  9. 25 10月, 2016 2 次提交
    • M
      Do a more thorough check of the state for every stream call. · b516b4bd
      Mark Adler 提交于
      This verifies that the state has been initialized, that it is the
      expected type of state, deflate or inflate, and that at least the
      first several bytes of the internal state have not been clobbered.
      b516b4bd
    • M
      Reject a window size of 256 bytes if not using the zlib wrapper. · 049578f0
      Mark Adler 提交于
      There is a bug in deflate for windowBits == 8 (256-byte window).
      As a result, zlib silently changes a request for 8 to a request
      for 9 (512-byte window), and sets the zlib header accordingly so
      that the decompressor knows to use a 512-byte window. However if
      deflateInit2() is used for raw deflate or gzip streams, then there
      is no indication that the request was not honored, and the
      application might assume that it can use a 256-byte window when
      decompressing. This commit returns an error if the user requests
      a 256-byte window when using raw deflate or gzip encoding.
      049578f0
  10. 15 10月, 2016 1 次提交
  11. 12 10月, 2016 1 次提交
  12. 22 9月, 2016 1 次提交
    • M
      Remove dummy structure declarations for old buggy compilers. · 3fb251b3
      Mark Adler 提交于
      While woolly mammoths still roamed the Earth and before Atlantis
      sunk into the ocean, there were C compilers that could not handle
      forward structure references, e.g. "struct name;". zlib dutifully
      provided a work-around for such compilers. That work-around is no
      longer needed, and, per the recommendation of a security audit of
      the zlib code by Trail of Bits and TrustInSoft, in support of the
      Mozilla Foundation, should be removed since what a compiler will
      do with this is technically undefined. From the report: "there is
      no telling what interactions the bug could have in the future with
      link-time optimizations and type-based alias analyses, both
      features that are present (but not default) in clang."
      3fb251b3
  13. 02 8月, 2015 1 次提交
    • M
      Align deflateParams() and its documentation in zlib.h. · 43bfaba3
      Mark Adler 提交于
      This updates the documentation to reflect the behavior of
      deflateParams() when it is not able to compress all of the input
      data provided so far due to insufficient output space.  It also
      assures that data provided is compressed before the parameter
      changes, even if at the beginning of the stream.
      43bfaba3
  14. 29 7月, 2015 2 次提交
  15. 06 7月, 2015 1 次提交
  16. 24 5月, 2013 1 次提交
  17. 03 5月, 2013 1 次提交
  18. 29 4月, 2013 1 次提交
  19. 14 4月, 2013 1 次提交
  20. 13 4月, 2013 1 次提交
  21. 25 3月, 2013 2 次提交
  22. 13 8月, 2012 1 次提交
    • M
      Clean up the usage of z_const and respect const usage within zlib. · 62d6112a
      Mark Adler 提交于
      This patch allows zlib to compile cleanly with the -Wcast-qual gcc
      warning enabled, but only if ZLIB_CONST is defined, which adds
      const to next_in and msg in z_stream and in the in_func prototype.
      A --const option is added to ./configure which adds -DZLIB_CONST
      to the compile flags, and adds -Wcast-qual to the compile flags
      when ZLIBGCCWARN is set in the environment.
      62d6112a
  23. 03 5月, 2012 1 次提交
  24. 13 2月, 2012 1 次提交
  25. 30 1月, 2012 1 次提交
  26. 17 1月, 2012 1 次提交
  27. 15 1月, 2012 1 次提交
  28. 14 1月, 2012 1 次提交
    • M
      Insert the first two strings in the hash table after a flush. · 4f5779a8
      Mark Adler 提交于
      This allows deflate to generate the same output when continuing after
      a Z_SYNC_FLUSH vs. using deflateSetDictionary() after a Z_FULL_FLUSH
      or a deflateReset().  It also slightly improves compression when
      flushing by providing two more strings to possibly match at the start
      of the new block.
      4f5779a8
  29. 08 1月, 2012 2 次提交
  30. 29 12月, 2011 2 次提交