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# std.zip

Read/write data in the zip archive format. Makes use of the etc.c.zlib compression library.
Bugs:

- Multi-disk zips not supported.
- Only Zip version 20 formats are supported.
- Only supports compression modes 0 (no compression) and 8 (deflate).
- Does not support encryption.
- Bugzilla 592
- Bugzilla 2137

Example:

    // Read existing zip file.
    import std.digest.crc, std.file, std.stdio, std.zip;

    void main(string[] args)
    {
       // read a zip file into memory
       auto zip = new ZipArchive(read(args[1]));
       writeln("Archive: ", args[1]);
       writefln("%-10s  %-8s  Name", "Length", "CRC-32");
       // iterate over all zip members
       foreach (name, am; zip.directory)
       {
           // print some data about each member
           writefln("%10s  %08x  %s", am.expandedSize, am.crc32, name);
           assert(am.expandedData.length == 0);
           // decompress the archive member
           zip.expand(am);
           assert(am.expandedData.length == am.expandedSize);
       }
    }

    // Create and write new zip file.
    import std.file: write;
    import std.string: representation;

    void main()
    {
       char[] data = "Test data.\n".dup;
       // Create an ArchiveMember for the test file.
       ArchiveMember am = new ArchiveMember();
       am.name = "test.txt";
       am.expandedData(data.representation);
       // Create an archive and add the member.
       ZipArchive zip = new ZipArchive();
       zip.addMember(am);
       // Build the archive
       void[] compressed_data = zip.build();
       // Write to a file
       write("test.zip", compressed_data);
    }

License:
Boost License 1.0.
Authors:
Walter Bright

Source: std/zip.d

class ZipException: object.Exception;
  Thrown on error.
enum CompressionMethod: ushort;
  Compression method used by ArchiveMember
  none
    No compression, just archiving
  deflate
    Deflate algorithm. Use zlib library to compress
class ArchiveMember;
  A member of the ZipArchive.
  string name;
    Read/Write: Usually the file name of the archive member; it is used to index the archive directory for the member. Each member must have a unique name[]. Do not change without removing member from the directory first.
  ubyte[] extra;
    Read/Write: extra data for this member.
  string comment;
    Read/Write: comment associated with this member.
  ushort flags;
    Read/Write: normally set to 0
  ushort internalAttributes;
    Read/Write
  @property ushort extractVersion();
    Read Only
  @property uint crc32();
    Read Only: cyclic redundancy check (CRC) value
  @property uint compressedSize();
    Read Only: size of data of member in compressed form.
  @property uint expandedSize();
    Read Only: size of data of member in expanded form.
  @property ushort diskNumber();
    Read Only: should be 0.
  @property ubyte[] compressedData();
    Read Only: data of member in compressed form.
  @property ubyte[] expandedData();
    Read data of member in uncompressed form.
  @property void expandedData(ubyte[] ed);
    Write data of member in uncompressed form.
  @property void fileAttributes(uint attr);
    Set the OS specific file attributes, as obtained by std.file.getAttributes or std.file.DirEntry.attributes, for this archive member.
  const @property uint fileAttributes();
    Get the OS specific file attributes for the archive member.
    Returns:
    The file attributes or 0 if the file attributes were encoded for an incompatible OS (Windows vs. Posix).
  @property void time(SysTime time);
  @property void time(DosFileTime time);
    Set the last modification time for this member.
  const @property DosFileTime time();
    Get the last modification time for this member.
  @property CompressionMethod compressionMethod();
    Read compression method used for this member
    See Also:
    CompressionMethod
  @property void compressionMethod(CompressionMethod cm);
    Write compression method used for this member
    See Also:
    CompressionMethod
class ZipArchive;
  Object representing the entire archive. ZipArchives are collections of ArchiveMembers.
  string comment;
    Read/Write: the archive comment. Must be less than 65536 bytes in length.
  @property ubyte[] data();
    Read Only: array representing the entire contents of the archive.
  @property uint diskNumber();
    Read Only: 0 since multi-disk zip archives are not supported.
  @property uint diskStartDir();
    Read Only: 0 since multi-disk zip archives are not supported
  @property uint numEntries();
  @property uint totalEntries();
    Read Only: number of ArchiveMembers in the directory.
  @property bool isZip64();
    True when the archive is in Zip64 format.
  @property void isZip64(bool value);
    Set this to true to force building a Zip64 archive.
  @property ArchiveMember[string] directory();
    Read Only: array indexed by the name of each member of the archive. All the members of the archive can be accessed with a foreach loop:

    Example:

        ZipArchive archive = new ZipArchive(data);
        foreach (ArchiveMember am; archive.directory)
        {
            writefln("member name is '%s'", am.name);
        }

  this();
    Constructor to use when creating a new archive.
  void addMember(ArchiveMember de);
    Add de to the archive.
  void deleteMember(ArchiveMember de);
    Delete de from the archive.
  void[] build();
    Construct an archive out of the current members of the archive.
    Fills in the properties data[], diskNumber, diskStartDir, numEntries, totalEntries, and directory[]. For each ArchiveMember, fills in properties crc32, compressedSize, compressedData[].
    Returns:
    array representing the entire archive.
  this(void[] buffer);
    Constructor to use when reading an existing archive.
    Fills in the properties data[], diskNumber, diskStartDir, numEntries, totalEntries, comment[], and directory[]. For each ArchiveMember, fills in properties madeVersion, extractVersion, flags, compressionMethod, time, crc32, compressedSize, expandedSize, compressedData[], diskNumber, internalAttributes, externalAttributes, name[], extra[], comment[]. Use expand() to get the expanded data for each ArchiveMember.
    Parameters:

    void[] buffer | the entire contents of the archive.

  ubyte[] expand(ArchiveMember de);
    Decompress the contents of archive member de and return the expanded data.
    Fills in properties extractVersion, flags, compressionMethod, time, crc32, compressedSize, expandedSize, expandedData[], name[], extra[].

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