Module: Zipping::PKHeader

Defined in:
lib/zipping.rb

Class Method Summary collapse

Class Method Details

.pk0102(dp) ⇒ Object

0102: central directory



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# File 'lib/zipping.rb', line 420

def self.pk0102(dp)
  # dp: info of an entry
  [
    ZS_c_pk0102,
    ZS_c_ver_made,
    (dp[:deflated] ? ZS_c_ver_nocomp : ZS_c_ver_deflate),
    (dp[:deflated] ? ZS_c_opt_0708 : ZS_c_opt_none),
    (dp[:deflated] ? ZS_c_comp_deflate : ZS_c_comp_none),
    dp[:filetime].to_binary_dos_time,
    dp[:filetime].to_binary_dos_date,
    dp[:crc],
    dp[:complen],
    dp[:uncomplen],
    dp[:binary_name].length,
    ZS_c_int2_zero,
    ZS_c_int2_zero,
    ZS_c_int2_zero,
    ZS_c_int2_zero,
    (dp[:type] == :symlink ? ZS_c_oattr_symlink : dp[:type] == :dir ? ZS_c_oattr_dir : ZS_c_oattr_file),
    dp[:offset]
  ]
end

.pk0304(filetime, namelen, deflated, crc = nil, compsize = nil, uncompsize = nil) ⇒ Object

0304: header of entries



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# File 'lib/zipping.rb', line 444

def self.pk0304(filetime, namelen, deflated, crc = nil, compsize = nil, uncompsize = nil)
  [
    ZS_c_pk0304,
    (deflated ? ZS_c_ver_deflate : ZS_c_ver_nocomp),
    (deflated ? ZS_c_opt_0708 : ZS_c_opt_none),
    (deflated ? ZS_c_comp_deflate : ZS_c_comp_none),
    filetime.to_binary_dos_time,
    filetime.to_binary_dos_date,
    (crc || ZS_c_int4_zero),
    (compsize || ZS_c_int4_zero),
    (uncompsize || ZS_c_int4_zero),
    namelen,
    ZS_c_int2_zero
  ]
end

.pk0506(entry_count, dirsize, offset) ⇒ Object

0506: end of central directory



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# File 'lib/zipping.rb', line 461

def self.pk0506(entry_count, dirsize, offset)
  # entry_count: count of entries in zip
  # dirsize: sum of central directory sizes
  # offset: byte offset of the first central directory
  [
    ZS_c_pk0506,
    ZS_c_int2_zero,
    ZS_c_int2_zero,
    entry_count,
    entry_count,
    dirsize,
    offset,
    ZS_c_int2_zero
  ]
end

.pk0708(crc, compsize, uncompsize) ⇒ Object

0708: optional trailer of entries



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# File 'lib/zipping.rb', line 478

def self.pk0708(crc, compsize, uncompsize)
  # crc: CRC32 for uncompressed data
  # compsize: size of compressed data
  # uncompsize: size of uncompressed data
  [
    ZS_c_pk0708,
    crc,
    compsize,
    uncompsize
  ]
end