1 package IO::Compress::Zip::Constants;
8 our ($VERSION, @ISA, @EXPORT, %GZIP_OS_Names);
35 GZIP_FEXTRA_HEADER_SIZE
37 GZIP_FEXTRA_SUBFIELD_HEADER_SIZE
38 GZIP_FEXTRA_SUBFIELD_ID_SIZE
39 GZIP_FEXTRA_SUBFIELD_LEN_SIZE
40 GZIP_FEXTRA_SUBFIELD_MAX_SIZE
42 GZIP_FNAME_INVALID_CHAR_RE
43 GZIP_FCOMMENT_INVALID_CHAR_RE
62 # Constants for the Zip Local Header
64 use constant ZIP_ID_SIZE => 4 ;
65 use constant ZIP_LOCAL_ID => 0x02014B50;
66 use constant ZIP_LOCAL_ID1 => 0x04;
67 use constant ZIP_LOCAL_ID2 => 0x03;
68 use constant ZIP_LOCAL_ID3 => 0x4B;
69 use constant ZIP_LOCAL_ID4 => 0x50;
71 use constant ZIP_MIN_HEADER_SIZE => 30 ;
72 use constant ZIP_TRAILER_SIZE => 0 ;
75 use constant GZIP_FLG_DEFAULT => 0x00 ;
76 use constant GZIP_FLG_FTEXT => 0x01 ;
77 use constant GZIP_FLG_FHCRC => 0x02 ; # called CONTINUATION in gzip
78 use constant GZIP_FLG_FEXTRA => 0x04 ;
79 use constant GZIP_FLG_FNAME => 0x08 ;
80 use constant GZIP_FLG_FCOMMENT => 0x10 ;
81 #use constant GZIP_FLG_ENCRYPTED => 0x20 ; # documented in gzip sources
82 use constant GZIP_FLG_RESERVED => (0x20 | 0x40 | 0x80) ;
84 use constant GZIP_MTIME_DEFAULT => 0x00 ;
85 use constant GZIP_FEXTRA_DEFAULT => 0x00 ;
86 use constant GZIP_FEXTRA_HEADER_SIZE => 2 ;
87 use constant GZIP_FEXTRA_MAX_SIZE => 0xFFFF ;
88 use constant GZIP_FEXTRA_SUBFIELD_HEADER_SIZE => 4 ;
89 use constant GZIP_FEXTRA_SUBFIELD_ID_SIZE => 2 ;
90 use constant GZIP_FEXTRA_SUBFIELD_LEN_SIZE => 2 ;
91 use constant GZIP_FEXTRA_SUBFIELD_MAX_SIZE => 0xFFFF ;
93 use constant GZIP_FNAME_INVALID_CHAR_RE => qr/[\x00-\x1F\x7F-\x9F]/;
94 use constant GZIP_FCOMMENT_INVALID_CHAR_RE => qr/[\x00-\x09\x11-\x1F\x7F-\x9F]/;
96 use constant GZIP_FHCRC_SIZE => 2 ; # aka CONTINUATION in gzip
98 use constant GZIP_CM_DEFLATED => 8 ;
100 use constant GZIP_NULL_BYTE => "\x00";
101 use constant GZIP_ISIZE_MAX => 0xFFFFFFFF ;
102 use constant GZIP_ISIZE_MOD_VALUE => GZIP_ISIZE_MAX + 1 ;
104 # OS Names sourced from http://www.gzip.org/format.txt
106 use constant GZIP_OS_DEFAULT=> 0xFF ;
114 6 => 'HPFS (OS/2, NT)',
121 13 => 'Acorn RISCOS',
122 14 => 'VFAT file system (Win95, NT)',
127 GZIP_OS_DEFAULT => 'Unknown',
130 use constant GZIP_MINIMUM_HEADER => pack("C4 V C C",
131 GZIP_ID1, GZIP_ID2, GZIP_CM_DEFLATED, GZIP_FLG_DEFAULT,
132 GZIP_MTIME_DEFAULT, GZIP_FEXTRA_DEFAULT, GZIP_OS_DEFAULT) ;