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- package IO::Compress::Zlib::Constants ;
-
- use strict ;
- use warnings;
- use bytes;
-
- require Exporter;
-
- our ($VERSION, @ISA, @EXPORT);
-
- $VERSION = '2.015';
-
- @ISA = qw(Exporter);
-
- @EXPORT= qw(
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- ZLIB_HEADER_SIZE
- ZLIB_TRAILER_SIZE
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- ZLIB_CMF_CM_OFFSET
- ZLIB_CMF_CM_BITS
- ZLIB_CMF_CM_DEFLATED
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- ZLIB_CMF_CINFO_OFFSET
- ZLIB_CMF_CINFO_BITS
- ZLIB_CMF_CINFO_MAX
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- ZLIB_FLG_FCHECK_OFFSET
- ZLIB_FLG_FCHECK_BITS
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- ZLIB_FLG_FDICT_OFFSET
- ZLIB_FLG_FDICT_BITS
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- ZLIB_FLG_LEVEL_OFFSET
- ZLIB_FLG_LEVEL_BITS
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- ZLIB_FLG_LEVEL_FASTEST
- ZLIB_FLG_LEVEL_FAST
- ZLIB_FLG_LEVEL_DEFAULT
- ZLIB_FLG_LEVEL_SLOWEST
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- ZLIB_FDICT_SIZE
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- );
-
- # Constant names derived from RFC1950
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- use constant ZLIB_HEADER_SIZE => 2;
- use constant ZLIB_TRAILER_SIZE => 4;
-
- use constant ZLIB_CMF_CM_OFFSET => 0;
- use constant ZLIB_CMF_CM_BITS => 0xF ; # 0b1111
- use constant ZLIB_CMF_CM_DEFLATED => 8;
-
- use constant ZLIB_CMF_CINFO_OFFSET => 4;
- use constant ZLIB_CMF_CINFO_BITS => 0xF ; # 0b1111;
- use constant ZLIB_CMF_CINFO_MAX => 7;
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- use constant ZLIB_FLG_FCHECK_OFFSET => 0;
- use constant ZLIB_FLG_FCHECK_BITS => 0x1F ; # 0b11111;
-
- use constant ZLIB_FLG_FDICT_OFFSET => 5;
- use constant ZLIB_FLG_FDICT_BITS => 0x1 ; # 0b1;
-
- use constant ZLIB_FLG_LEVEL_OFFSET => 6;
- use constant ZLIB_FLG_LEVEL_BITS => 0x3 ; # 0b11;
-
- use constant ZLIB_FLG_LEVEL_FASTEST => 0;
- use constant ZLIB_FLG_LEVEL_FAST => 1;
- use constant ZLIB_FLG_LEVEL_DEFAULT => 2;
- use constant ZLIB_FLG_LEVEL_SLOWEST => 3;
-
- use constant ZLIB_FDICT_SIZE => 4;
-
-
- 1;
-