| |
| package IO::Compress::Zlib::Constants ; |
| |
| use strict ; |
| use warnings; |
| use bytes; |
| |
| require Exporter; |
| |
| our ($VERSION, @ISA, @EXPORT); |
| |
| $VERSION = '2.011'; |
| |
| @ISA = qw(Exporter); |
| |
| @EXPORT= qw( |
| |
| ZLIB_HEADER_SIZE |
| ZLIB_TRAILER_SIZE |
| |
| ZLIB_CMF_CM_OFFSET |
| ZLIB_CMF_CM_BITS |
| ZLIB_CMF_CM_DEFLATED |
| |
| ZLIB_CMF_CINFO_OFFSET |
| ZLIB_CMF_CINFO_BITS |
| ZLIB_CMF_CINFO_MAX |
| |
| ZLIB_FLG_FCHECK_OFFSET |
| ZLIB_FLG_FCHECK_BITS |
| |
| ZLIB_FLG_FDICT_OFFSET |
| ZLIB_FLG_FDICT_BITS |
| |
| ZLIB_FLG_LEVEL_OFFSET |
| ZLIB_FLG_LEVEL_BITS |
| |
| ZLIB_FLG_LEVEL_FASTEST |
| ZLIB_FLG_LEVEL_FAST |
| ZLIB_FLG_LEVEL_DEFAULT |
| ZLIB_FLG_LEVEL_SLOWEST |
| |
| ZLIB_FDICT_SIZE |
| |
| ); |
| |
| # Constant names derived from RFC1950 |
| |
| 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; |
| |
| 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; |