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sub fatal_tryWalk;
sub fatal_truncated ;
sub info ;
sub warning ;
sub error ;
sub debug ;
sub fatal ;
sub topLevelFatal ;
sub internalFatal;
sub need ;
sub decimalHex;

use constant MAX64 => 0xFFFFFFFFFFFFFFFF ;
use constant MAX32 => 0xFFFFFFFF ;
use constant MAX16 => 0xFFFF ;

# Compression types
use constant ZIP_CM_STORE                      => 0 ;
use constant ZIP_CM_IMPLODE                    => 6 ;
use constant ZIP_CM_DEFLATE                    => 8 ;
use constant ZIP_CM_BZIP2                      => 12 ;
use constant ZIP_CM_LZMA                       => 14 ;
use constant ZIP_CM_REFERENCE                  => 92 ;
use constant ZIP_CM_PPMD                       => 98 ;
use constant ZIP_CM_AES                        => 99 ; # Not really c compression method

# General Purpose Flag
use constant ZIP_GP_FLAG_ENCRYPTED_MASK        => (1 << 0) ;
use constant ZIP_GP_FLAG_STREAMING_MASK        => (1 << 3) ;
use constant ZIP_GP_FLAG_PATCHED_MASK          => (1 << 5) ;
use constant ZIP_GP_FLAG_STRONG_ENCRYPTED_MASK => (1 << 6) ;
use constant ZIP_GP_FLAG_LZMA_EOS_PRESENT      => (1 << 1) ;
use constant ZIP_GP_FLAG_LANGUAGE_ENCODING     => (1 << 11) ;
use constant ZIP_GP_FLAG_PKWARE_ENHANCED_COMP  => (1 << 12) ;
use constant ZIP_GP_FLAG_ENCRYPTED_CD          => (1 << 13) ;

# All the encryption flags
use constant ZIP_GP_FLAG_ALL_ENCRYPT            => (ZIP_GP_FLAG_ENCRYPTED_MASK | ZIP_GP_FLAG_STRONG_ENCRYPTED_MASK | ZIP_GP_FLAG_ENCRYPTED_CD );

# Internal File Attributes
use constant ZIP_IFA_TEXT_MASK                 => 1;

# Signatures for each of the headers
use constant ZIP_LOCAL_HDR_SIG                 => 0x04034b50;
use constant ZIP_DATA_HDR_SIG                  => 0x08074b50;
use constant ZIP_CENTRAL_HDR_SIG               => 0x02014b50;
use constant ZIP_END_CENTRAL_HDR_SIG           => 0x06054b50;
use constant ZIP64_END_CENTRAL_REC_HDR_SIG     => 0x06064b50;
use constant ZIP64_END_CENTRAL_LOC_HDR_SIG     => 0x07064b50;
use constant ZIP_DIGITAL_SIGNATURE_SIG         => 0x05054b50;
use constant ZIP_ARCHIVE_EXTRA_DATA_RECORD_SIG => 0x08064b50;
use constant ZIP_SINGLE_SEGMENT_MARKER         => 0x30304b50; # APPNOTE 6.3.10, sec 8.5.4

# Windows file attributes -- see https://learn.microsoft.com/en-us/windows/win32/fileio/file-attribute-constants
use constant WIN_FILE_ATTRIBUTE_READONLY                => 0x0001;
use constant WIN_FILE_ATTRIBUTE_HIDDEN                  => 0x0002;
use constant WIN_FILE_ATTRIBUTE_SYSTEM                  => 0x0004;
use constant WIN_FILE_ATTRIBUTE_LABEL                   => 0x0008; # Unused?
use constant WIN_FILE_ATTRIBUTE_DIRECTORY               => 0x0010;
use constant WIN_FILE_ATTRIBUTE_ARCHIVE                 => 0x0020;
use constant WIN_FILE_ATTRIBUTE_DEVICE_OR_SYMBOLIC_LINK => 0x0040; # Not clear if this is used for a symbolic link. Needs a real use case to verify.
use constant WIN_FILE_ATTRIBUTE_NORMAL_OR_EXECUTABLE    => 0x0080; # Not clear if this is used for a executable. Needs a real use case to verify.
use constant WIN_FILE_ATTRIBUTE_TEMPORARY               => 0x0100;
use constant WIN_FILE_ATTRIBUTE_SPARSE_FILE             => 0x0200;
use constant WIN_FILE_ATTRIBUTE_REPARSE_POINT           => 0x0400;
use constant WIN_FILE_ATTRIBUTE_COMPRESSED              => 0x0800;
use constant WIN_FILE_ATTRIBUTE_OFFLINE                 => 0x1000;
use constant WIN_FILE_ATTRIBUTE_NOT_CONTENT_INDEXED     => 0x2000;
use constant WIN_FILE_ATTRIBUTE_ENCRYPTED               => 0x4000;

# Windows symlink covers multiple bits
use constant WIN_FILE_ATTRIBUTE_SYMBOLIC_LINK_MASK  => WIN_FILE_ATTRIBUTE_REPARSE_POINT;

# The Symbolic Link Mask may become this if I can find a real use case.
# use constant WIN_FILE_ATTRIBUTE_SYMBOLIC_LINK_MASK  => WIN_FILE_ATTRIBUTE_DEVICE_OR_SYMBOLIC_LINK | WIN_FILE_ATTRIBUTE_REPARSE_POINT;

# Extra sizes
use constant ZIP_EXTRA_HEADER_SIZE          => 2 ;
use constant ZIP_EXTRA_MAX_SIZE             => 0xFFFF ;
use constant ZIP_EXTRA_SUBFIELD_ID_SIZE     => 2 ;
use constant ZIP_EXTRA_SUBFIELD_LEN_SIZE    => 2 ;
use constant ZIP_EXTRA_SUBFIELD_HEADER_SIZE => ZIP_EXTRA_SUBFIELD_ID_SIZE +
                                               ZIP_EXTRA_SUBFIELD_LEN_SIZE;
use constant ZIP_EXTRA_SUBFIELD_MAX_SIZE    => ZIP_EXTRA_MAX_SIZE -
                                               ZIP_EXTRA_SUBFIELD_HEADER_SIZE;

use constant ZIP_EOCD_MIN_SIZE              => 22 ;
use constant ZIP_CENTRAL_HDR_MIN_SIZE       => 46 ;

use constant ZIP_LD_FILENAME_OFFSET         => 30;
use constant ZIP_CD_FILENAME_OFFSET         => 46;

my %ZIP_CompressionMethods =
    (
          0 => 'Stored',
          1 => 'Shrunk',
          2 => 'Reduced compression factor 1',
          3 => 'Reduced compression factor 2',
          4 => 'Reduced compression factor 3',
          5 => 'Reduced compression factor 4',
          6 => 'Imploded',
          7 => 'Tokenized',
          8 => 'Deflated',
          9 => 'Deflate64',
         10 => 'PKWARE Data Compression Library Imploding',
         11 => 'Reserved by PKWARE',
         12 => 'BZIP2',
         13 => 'Reserved by PKWARE',
         14 => 'LZMA',
         15 => 'Reserved by PKWARE',
         16 => 'IBM z/OS CMPSC Compression',
         17 => 'Reserved by PKWARE',
         18 => 'IBM/TERSE or Xceed BWT', # APPNOTE has IBM/TERSE. Xceed reuses it unofficially
         19 => 'IBM LZ77 z Architecture (PFS)',
         20 => 'Zstandard (Deprecated) or Ipaq8', # Deprecated ZStandard and see https://encode.su/threads/1048-info-zip-lpaq8
         92 => 'Reference', # Winzip Only from version 25
         93 => 'Zstandard',
         94 => 'MP3',
         95 => 'XZ',
         96 => 'WinZip JPEG Compression',
         97 => 'WavPack compressed data',
         98 => 'PPMd version I, Rev 1',