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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
  const pure nothrow @nogc @property @safe ushort `extractVersion`();
    Read Only
  const pure nothrow @nogc @property @safe uint `crc32`();
    Read Only: cyclic redundancy check (CRC) value
  const pure nothrow @nogc @property @safe uint `compressedSize`();
    Read Only: size of data of member in compressed form.
  const pure nothrow @nogc @property @safe uint `expandedSize`();
    Read Only: size of data of member in expanded form.
  const pure nothrow @nogc @property @safe ushort `diskNumber`();
    Read Only: should be 0.
  pure nothrow @nogc @property @safe ubyte[] `compressedData`();
    Read Only: data of member in compressed form.
  pure nothrow @nogc @property @safe ubyte[] `expandedData`();
    Read data of member in uncompressed form.
  @property @safe void `expandedData`(ubyte[] `ed`);
    Write data of member in uncompressed form.
  @property @safe 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 nothrow @nogc @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`);
  pure nothrow @nogc @property @safe void `time`(DosFileTime `time`);
    Set the last modification time for this member.
  const pure nothrow @nogc @property @safe DosFileTime `time`();
    Get the last modification time for this member.
  const pure nothrow @nogc @property @safe CompressionMethod `compressionMethod`();
    Read compression method used for this member
    See Also:
    CompressionMethod
  pure @property @safe void `compressionMethod`(CompressionMethod `cm`);
    Write compression method used for this member
    See Also:
    CompressionMethod
  const pure nothrow @nogc @property @safe uint `index`();
    The index of this archive member within the archive.
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.
  pure nothrow @nogc @property @safe ubyte[] `data`();
    Read Only: array representing the entire contents of the archive.
  const pure nothrow @nogc @property @safe uint `diskNumber`();
    Read Only: 0 since multi-disk zip archives are not supported.
  const pure nothrow @nogc @property @safe uint `diskStartDir`();
    Read Only: 0 since multi-disk zip archives are not supported
  const pure nothrow @nogc @property @safe uint `numEntries`();
  const pure nothrow @nogc @property @safe uint `totalEntries`();
    Read Only: number of ArchiveMembers in the directory.
  const pure nothrow @nogc @property @safe bool `isZip64`();
    True when the archive is in Zip64 format.
  pure nothrow @nogc @property @safe void `isZip64`(bool `value`);
    Set this to true to force building a Zip64 archive.
  pure nothrow @nogc @property @safe 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);
        }

  pure nothrow @nogc @safe this();
    Constructor to use when creating a new archive.
  @safe void `addMember`(ArchiveMember `de`);
    Add de to the archive. The file is compressed on the fly.
  @safe void `deleteMember`(ArchiveMember `de`);
    Delete de from the archive.
  pure @safe 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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