Struct ZipLocalFileHeader

pub struct ZipLocalFileHeader<'a> {

    pub version_required_to_extract: u16,
    pub general_purpose_flags: u16,
    pub compression_method: u16,
    pub last_mod_time: u16,
    pub last_mod_date: u16,
    pub crc32: u32,
    pub compressed_size: u32,
    pub uncompressed_size: u32,
    pub file_name_length: u16,
    pub extra_field_length: u16,
    pub file_name_raw: Vec<u8>,
    pub extra_field: Vec<u8>,
    pub compressed_data: Cow<'a, [u8]>,
    pub data_descriptor: Option<ZipDataDescriptor>,
    pub starting_position_with_signature: u64,
    pub starting_position_without_signature: u64,
}

An entry of local header of ZIP file

Fields

version_required_to_extract: u16

As the name implies; see 4.4.3 in https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT

Unaffected by file renaming

general_purpose_flags: u16

See 4.4.4 in https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT

bit #n reprents 1 << n in little endian

Unaffected by file renaming

compression_method: u16

As the name implies; see 4.4.5 in https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT

Unaffected by file renaming

last_mod_time: u16

As the name implies; see 4.4.6 in https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT

MS-DOS time: http://www.ffortune.net/calen/calen/etime.htm (Japanese)

Unaffected by file renaming

last_mod_date: u16

As the name implies; see 4.4.6 in https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT

MS-DOS time: http://www.ffortune.net/calen/calen/etime.htm (Japanese)

Unaffected by file renaming

crc32: u32

See 4.4.7 in https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT

Unaffected by file renaming

compressed_size: u32

As the name implies. Note that the file name is not included.

uncompressed_size: u32

As the name implies. Note that the file name is not included.

file_name_length: u16

As the name implies.

extra_field_length: u16

As the name implies.

file_name_raw: Vec<u8>

Byte sequence of the file name.

extra_field: Vec<u8>

Byte sequence of extra field

compressed_data: Cow<'a, [u8]>

File content

data_descriptor: Option<ZipDataDescriptor>

Data descriptor just after the file content (exists only when bit #3 of general purpose flag is set)

starting_position_with_signature: u64

ローカルファイルヘッダの開始位置 (マジックナンバー) / (magick number of) local file header starting position

starting_position_without_signature: u64

ローカルファイルヘッダの開始位置 (マジックナンバーすぐ次) / Local file header starting position (next to magick number)

Implementations

impl ZipLocalFileHeader<'_>

pub fn set_utf8_encoded_flag(&mut self)

Sets bit #11 of general purpose bit to indicate that the file name & comment are encoded in UTF-8.

pub fn set_file_name_from_slice(&mut self, name: &Vec<u8>)

Replaces the file name.

Arguments

• name - Slice of new name

pub fn read_and_generate_from_signature<T: ReadBytesExt + Seek>( read: &mut T, ) -> Result<Self, ZipReadError>

Reads local file header from the cjurrent position.

Arguments

• read - file handler (must be at the start of the signature)

pub fn from_central_directory<T: ReadBytesExt + Seek>( read: &mut T, cd: &ZipCDEntry, ) -> Result<Self, ZipReadError>

Examines the signature, reads the local file header and returns an instance that represents it

Arguments

• read - file handler (must be at the head of the signature)

pub fn write<T: WriteBytesExt>(&self, write: &mut T) -> Result<u64>

Writes the content of this local file header to file and returns the number of bytes written.

Arguments

• write - file handler