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Diffstat (limited to 'lib/stdlib/doc/src/zip.xml')
| -rw-r--r-- | lib/stdlib/doc/src/zip.xml | 683 |
1 files changed, 369 insertions, 314 deletions
diff --git a/lib/stdlib/doc/src/zip.xml b/lib/stdlib/doc/src/zip.xml index 09a6587583..de23608046 100644 --- a/lib/stdlib/doc/src/zip.xml +++ b/lib/stdlib/doc/src/zip.xml @@ -28,98 +28,130 @@ <docno>1</docno> <approved></approved> <checked></checked> - <date>05-11-02</date> + <date>2005-11-02</date> <rev>PA1</rev> - <file>zip.sgml</file> + <file>zip.xml</file> </header> <module>zip</module> - <modulesummary>Utility for reading and creating 'zip' archives.</modulesummary> + <modulesummary>Utility for reading and creating 'zip' archives. + </modulesummary> <description> - <p>The <c>zip</c> module archives and extracts files to and from a zip - archive. The zip format is specified by the "ZIP Appnote.txt" file - available on PKWare's website www.pkware.com.</p> + <p>This module archives and extracts files to and from a zip + archive. The zip format is specified by the "ZIP Appnote.txt" file, + available on the PKWARE web site + <url href="http://www.pkware.com">www.pkware.com</url>.</p> <p>The zip module supports zip archive versions up to 6.1. However, password-protection and Zip64 are not supported.</p> - <p>By convention, the name of a zip file should end in "<c>.zip</c>". - To abide to the convention, you'll need to add "<c>.zip</c>" yourself - to the name.</p> - <p>Zip archives are created with the - <seealso marker="#zip_2">zip/2</seealso> or the - <seealso marker="#zip_2">zip/3</seealso> function. (They are - also available as <c>create</c>, to resemble the <c>erl_tar</c> - module.)</p> - <p>To extract files from a zip archive, use the - <seealso marker="#unzip_1">unzip/1</seealso> or the - <seealso marker="#unzip_2">unzip/2</seealso> function. (They are - also available as <c>extract</c>.)</p> - <p>To fold a function over all files in a zip archive, use the - <seealso marker="#foldl_3">foldl_3</seealso> function.</p> - <p>To return a list of the files in a zip archive, use the - <seealso marker="#list_dir_1">list_dir/1</seealso> or the - <seealso marker="#list_dir_2">list_dir/2</seealso> function. (They - are also available as <c>table</c>.)</p> - <p>To print a list of files to the Erlang shell, - use either the <seealso marker="#t_1">t/1</seealso> or - <seealso marker="#tt_1">tt/1</seealso> function.</p> - <p>In some cases, it is desirable to open a zip archive, and to - unzip files from it file by file, without having to reopen the - archive. The functions - <seealso marker="#zip_open">zip_open</seealso>, - <seealso marker="#zip_get">zip_get</seealso>, - <seealso marker="#zip_list_dir">zip_list_dir</seealso> and - <seealso marker="#zip_close">zip_close</seealso> do this.</p> + <p>By convention, the name of a zip file is to end with <c>.zip</c>. + To abide to the convention, add <c>.zip</c> to the filename.</p> + <list type="bulleted"> + <item> + <p>To create zip archives, use function + <seealso marker="#zip/2"><c>zip/2</c></seealso> or + <seealso marker="#zip/2"><c>zip/3</c></seealso>. They are + also available as <c>create/2,3</c>, to resemble the + <seealso marker="erl_tar"><c>erl_tar</c></seealso> module.</p> + </item> + <item> + <p>To extract files from a zip archive, use function + <seealso marker="#unzip/1"><c>unzip/1</c></seealso> or + <seealso marker="#unzip/2"><c>unzip/2</c></seealso>. They are + also available as <c>extract/1,2</c>, to resemble the + <seealso marker="erl_tar"><c>erl_tar</c></seealso> module.</p> + </item> + <item> + <p>To fold a function over all files in a zip archive, use function + <seealso marker="#foldl/3"><c>foldl/3</c></seealso>.</p> + </item> + <item> + <p>To return a list of the files in a zip archive, use function + <seealso marker="#list_dir/1"><c>list_dir/1</c></seealso> or + <seealso marker="#list_dir/2"><c>list_dir/2</c></seealso>. They are + also available as <c>table/1,2</c>, to resemble the + <seealso marker="erl_tar"><c>erl_tar</c></seealso> module.</p> + </item> + <item> + <p>To print a list of files to the Erlang shell, use function + <seealso marker="#t/1"><c>t/1</c></seealso> or + <seealso marker="#tt/1"><c>tt/1</c></seealso>.</p> + </item> + <item> + <p>Sometimes it is desirable to open a zip archive, and to + unzip files from it file by file, without having to reopen the + archive. This can be done by functions + <seealso marker="#zip_open/1"><c>zip_open/1,2</c></seealso>, + <seealso marker="#zip_get/1"><c>zip_get/1,2</c></seealso>, + <seealso marker="#zip_list_dir/1"><c>zip_list_dir/1</c></seealso>, and + <seealso marker="#zip_close/1"><c>zip_close/1</c></seealso>.</p> + </item> + </list> </description> <section> - <title>LIMITATIONS</title> - <p>Zip64 archives are not currently supported.</p> - <p>Password-protected and encrypted archives are not currently - supported</p> - <p>Only the DEFLATE (zlib-compression) and the STORE (uncompressed - data) zip methods are supported.</p> - <p>The size of the archive is limited to 2 G-byte (32 bits).</p> - <p>Comments for individual files is not supported when creating zip - archives. The zip archive comment for the whole zip archive is - supported.</p> - <p>There is currently no support for altering an existing zip archive. - To add or remove a file from an archive, the whole archive must be - recreated.</p> + <title>Limitations</title> + <list type="bulleted"> + <item> + <p>Zip64 archives are not supported.</p> + </item> + <item> + <p>Password-protected and encrypted archives are not supported.</p> + </item> + <item> + <p>Only the DEFLATE (zlib-compression) and the STORE (uncompressed + data) zip methods are supported.</p> + </item> + <item> + <p>The archive size is limited to 2 GB (32 bits).</p> + </item> + <item> + <p>Comments for individual files are not supported when creating zip + archives. The zip archive comment for the whole zip archive is + supported.</p> + </item> + <item> + <p>Changing a zip archive is not supported. + To add or remove a file from an archive, the whole archive must be + recreated.</p> + </item> + </list> </section> <datatypes> <datatype> <name name="zip_comment"/> <desc> - <p>The record <c>zip_comment</c> just contains the archive comment for - a zip archive</p> + <p>The record <c>zip_comment</c> only contains the archive comment for + a zip archive.</p> </desc> </datatype> <datatype> <name name="zip_file"/> <desc> - <p>The record <c>zip_file</c> contains the following fields.</p> + <p>The record <c>zip_file</c> contains the following fields:</p> <taglist> <tag><c>name</c></tag> <item> - <p>the name of the file</p> + <p>The filename</p> </item> <tag><c>info</c></tag> <item> - <p>file info as in - <seealso marker="kernel:file#read_file_info/1">file:read_file_info/1</seealso></p> + <p>File information as in + <seealso marker="kernel:file#read_file_info/1"> + <c>file:read_file_info/1</c></seealso> + in <c>Kernel</c></p> </item> <tag><c>comment</c></tag> <item> - <p>the comment for the file in the zip archive</p> + <p>The comment for the file in the zip archive</p> </item> <tag><c>offset</c></tag> <item> - <p>the offset of the file in the zip archive (used internally)</p> + <p>The file offset in the zip archive (used internally)</p> </item> <tag><c>comp_size</c></tag> <item> - <p>the compressed size of the file (the uncompressed size is found - in <c>info</c>)</p> + <p>The size of the compressed file (the size of the uncompressed + file is found in <c>info</c>)</p> </item> </taglist> </desc> @@ -133,224 +165,44 @@ <datatype> <name name="create_option"/> <desc> - <p>These options are described in <seealso marker="#zip_options">create/3</seealso>.</p> + <p>These options are described in <seealso marker="#zip_options"> + <c>create/3</c></seealso>.</p> </desc> </datatype> <datatype> - <name name="handle"/> + <name name="handle"/> <desc> - <p>As returned by <seealso marker="#zip_open/2">zip_open/2</seealso>.</p> + <p>As returned by + <seealso marker="#zip_open/2"><c>zip_open/2</c></seealso>.</p> </desc> </datatype> </datatypes> + <funcs> <func> - <name name="zip" arity="2"/> - <name name="zip" arity="3"/> - <name name="create" arity="2"/> - <name name="create" arity="3"/> - <fsummary>Create a zip archive with options</fsummary> - <desc> - <p>The <marker id="zip_2"></marker><c>zip</c> function creates a - zip archive containing the files specified in <c><anno>FileList</anno></c>.</p> - <p>As synonyms, the functions <c>create/2</c> and <c>create/3</c> - are provided, to make it resemble the <c>erl_tar</c> module.</p> - <p>The file-list is a list of files, with paths relative to the - current directory, they will be stored with this path in the - archive. Files may also be specified with data in binaries, - to create an archive directly from data.</p> - <p>Files will be compressed using the DEFLATE compression, as - described in the Appnote.txt file. However, files will be - stored without compression if they already are compressed. - The <c>zip/2</c> and <c>zip/3</c> functions check the file extension - to see whether the file should be stored without compression. - Files with the following extensions are not compressed: - <c>.Z</c>, <c>.zip</c>, <c>.zoo</c>, <c>.arc</c>, <c>.lzh</c>, - <c>.arj</c>.</p> - <p>It is possible to override the default behavior and - explicitly control what types of files that should be - compressed by using the <c>{compress, <anno>What</anno>}</c> and - <c>{uncompress, <anno>What</anno>}</c> options. It is possible to have - several <c>compress</c> and <c>uncompress</c> options. In - order to trigger compression of a file, its extension must - match with the - <c>compress</c> condition and must not match the - <c>uncompress</c> condition. For example if <c>compress</c> is - set to <c>["gif", "jpg"]</c> and <c>uncompress</c> is set to - <c>["jpg"]</c>, only files with <c>"gif"</c> as extension will - be compressed. No other files will be compressed.</p> - <marker id="zip_options"></marker> - <p>The following options are available:</p> - <taglist> - <tag><c>cooked</c></tag> - <item> - <p>By default, the <c>open/2</c> function will open the - zip file in <c>raw</c> mode, which is faster but does not allow - a remote (erlang) file server to be used. Adding <c>cooked</c> - to the mode list will override the default and open the zip file - without the <c>raw</c> option. The same goes for the files - added.</p> - </item> - <tag><c>verbose</c></tag> - <item> - <p>Print an informational message about each file - being added.</p> - </item> - <tag><c>memory</c></tag> - <item> - <p>The output will not be to a file, but instead as a tuple - <c>{<anno>FileName</anno>, binary()}</c>. The binary will be a full zip - archive with header, and can be extracted with for instance - <c>unzip/2</c>.</p> - </item> - <tag><c>{comment, <anno>Comment</anno>}</c></tag> - <item> - <p>Add a comment to the zip-archive.</p> - </item> - <tag><c>{cwd, <anno>CWD</anno>}</c></tag> - <item> - <p>Use the given directory as current directory, it will be - prepended to file names when adding them, although it will not - be in the zip-archive. (Acting like a file:set_cwd/1, but - without changing the global cwd property.)</p> - </item> - <tag><c>{compress, <anno>What</anno>}</c></tag> - <item> - <p>Controls what types of files will be - compressed. It is by default set to <c>all</c>. The - following values of <c>What</c> are allowed:</p> - <taglist> - <tag><c>all</c></tag> - <item><p> means that all files will be compressed (as long - as they pass the <c>uncompress</c> condition).</p></item> - <tag><c>[<anno>Extension</anno>]</c></tag> - <item><p>means that only files with exactly these extensions - will be compressed.</p></item> - <tag><c>{add,[<anno>Extension</anno>]}</c></tag> - <item><p>adds these extensions to the list of compress - extensions.</p></item> - <tag><c>{del,[<anno>Extension</anno>]}</c></tag> - <item><p>deletes these extensions from the list of compress - extensions.</p></item> - </taglist> - </item> - <tag><c>{uncompress, <anno>What</anno>}</c></tag> - <item> - <p>Controls what types of files will be uncompressed. It is by - default set to <c>[".Z", ".zip", ".zoo", ".arc", ".lzh", ".arj"]</c>. - The following values of <c>What</c> are allowed:</p> - <taglist> - <tag><c>all</c></tag> - <item><p> means that no files will be compressed.</p></item> - <tag><c>[<anno>Extension</anno>]</c></tag> - <item><p>means that files with these extensions will be - uncompressed.</p></item> - <tag><c>{add,[<anno>Extension</anno>]}</c></tag> - <item><p>adds these extensions to the list of uncompress - extensions.</p></item> - <tag><c>{del,[<anno>Extension</anno>]}</c></tag> - <item><p>deletes these extensions from the list of uncompress - extensions.</p></item> - </taglist> - </item> - </taglist> - </desc> - </func> - <func> - <name name="unzip" arity="1"/> - <name name="unzip" arity="2"/> - <name name="extract" arity="1"/> - <name name="extract" arity="2"/> - <fsummary>Extract files from a zip archive</fsummary> - <desc> - <p>The <marker id="unzip_1"></marker><c>unzip/1</c> function extracts - all files from a zip archive. - The <marker id="unzip_2"></marker><c>unzip/2</c> function provides - options to extract some files, and more.</p> - <p>If the <c><anno>Archive</anno></c> argument is given as a binary, - the contents of the binary is assumed to be a zip archive, - otherwise it should be a filename.</p> - <p>The following options are available:</p> - <taglist> - <tag><c>{file_list, <anno>FileList</anno>}</c></tag> - <item> - <p>By default, all files will be extracted from the zip - archive. With the <c>{file_list, <anno>FileList</anno>}</c> option, - the <c>unzip/2</c> function will only extract the files - whose names are included in <c><anno>FileList</anno></c>. The full - paths, including the names of all sub directories within - the zip archive, must be specified.</p> - </item> - <tag><c>cooked</c></tag> - <item> - <p>By default, the <c>open/2</c> function will open the - zip file in <c>raw</c> mode, which is faster but does not allow - a remote (erlang) file server to be used. Adding <c>cooked</c> - to the mode list will override the default and open the zip file - without the <c>raw</c> option. The same goes for the files - extracted.</p> - </item> - <tag><c>keep_old_files</c></tag> - <item> - <p>By default, all existing files with the same name as file in - the zip archive will be overwritten. With the <c>keep_old_files</c> - option, the <c>unzip/2</c> function will not overwrite any existing - files. Note that even with the <c>memory</c> option given, which - means that no files will be overwritten, files existing will be - excluded from the result.</p> - </item> - <tag><c>verbose</c></tag> - <item> - <p>Print an informational message as each file is being - extracted.</p> - </item> - <tag><c>memory</c></tag> - <item> - <p>Instead of extracting to the current directory, the - <c>memory</c> option will give the result as a list of tuples - <c>{Filename, Binary}</c>, where <c>Binary</c> is a binary - containing the extracted data of the file named <c>Filename</c> - in the zip archive.</p> - </item> - <tag><c>{cwd, CWD}</c></tag> - <item> - <p>Use the given directory as current directory, it will be - prepended to file names when extracting them from the - zip-archive. (Acting like a file:set_cwd/1, but without - changing the global cwd property.)</p> - </item> - </taglist> - </desc> - </func> - <func> <name name="foldl" arity="3"/> - <fsummary>Fold a function over all files in a zip archive</fsummary> + <fsummary>Fold a function over all files in a zip archive.</fsummary> <desc> - <p>The <marker id="foldl_3"></marker> <c>foldl/3</c> function - calls <c><anno>Fun</anno>(<anno>FileInArchive</anno>, <anno>GetInfo - </anno>, <anno>GetBin</anno>, <anno>AccIn</anno>)</c> on - successive files in the <c>Archive</c>, starting with - <c><anno>AccIn</anno> - == <anno>Acc0</anno></c>. <c><anno>FileInArchive</anno></c> is - the name that the file - has in the archive. <c><anno>GetInfo</anno></c> is a fun that - returns info - about the the file. <c><anno>GetBin</anno></c> returns the contents - of the - file. Both <c><anno>GetInfo</anno></c> and <c><anno>GetBin</anno></c> - must be called - within the <c><anno>Fun</anno></c>. Their behavior is undefined if - they are - called outside the context of the <c><anno>Fun</anno></c>. - The <c><anno>Fun</anno></c> - must return a new accumulator which is passed to the next - call. <c>foldl/3</c> returns the final value of the - accumulator. <c><anno>Acc0</anno></c> is returned if the archive is - empty. It is not necessary to iterate over all files in the - archive. The iteration may be ended prematurely in a - controlled manner by throwing an exception.</p> - - <p>For example:</p> + <p>Calls <c><anno>Fun</anno>(<anno>FileInArchive</anno>, <anno>GetInfo + </anno>, <anno>GetBin</anno>, <anno>AccIn</anno>)</c> on + successive files in the <c>Archive</c>, starting with + <c><anno>AccIn</anno> == <anno>Acc0</anno></c>.</p> + <p><c><anno>FileInArchive</anno></c> is the name that the file + has in the archive.</p> + <p><c><anno>GetInfo</anno></c> is a fun that returns information + about the file.</p> + <p><c><anno>GetBin</anno></c> returns the file contents.</p> + <p>Both <c><anno>GetInfo</anno></c> and <c><anno>GetBin</anno></c> + must be called within the <c><anno>Fun</anno></c>. Their behavior is + undefined if they are called outside the context of + <c><anno>Fun</anno></c>.</p> + <p>The <c><anno>Fun</anno></c> must return a new accumulator, which is + passed to the next call. <c>foldl/3</c> returns the final accumulator + value. <c><anno>Acc0</anno></c> is returned if the archive is + empty. It is not necessary to iterate over all files in the archive. + The iteration can be ended prematurely in a controlled manner + by throwing an exception.</p> + <p><em>Example:</em></p> <pre> > <input>Name = "dummy.zip".</input> "dummy.zip" @@ -380,97 +232,300 @@ </pre> </desc> </func> + <func> <name name="list_dir" arity="1"/> <name name="list_dir" arity="2"/> <name name="table" arity="1" /> <name name="table" arity="2"/> - <fsummary>Retrieve the name of all files in a zip archive</fsummary> + <fsummary>Retrieve the name of all files in a zip archive.</fsummary> <desc> - <p>The <marker id="list_dir_1"></marker><c>list_dir/1</c> - function retrieves the names of all files in the zip archive - <c><anno>Archive</anno></c>. The <marker id="list_dir_2"></marker> - <c>list_dir/2</c> function provides options.</p> - <p>As synonyms, the functions <c>table/2</c> and <c>table/3</c> - are provided, to make it resemble the <c>erl_tar</c> module.</p> + <p><c>list_dir/1</c> retrieves all filenames in the zip archive + <c><anno>Archive</anno></c>.</p> + <p><c>list_dir/2</c> provides options.</p> + <p><c>table/1</c> and <c>table/2</c> are provided as synonyms + to resemble the + <seealso marker="erl_tar"><c>erl_tar</c></seealso> module.</p> <p>The result value is the tuple <c>{ok, List}</c>, where <c>List</c> contains the zip archive comment as the first element.</p> - <p>The following options are available:</p> + <p>One option is available:</p> <taglist> <tag><c>cooked</c></tag> <item> - <p>By default, the <c>open/2</c> function will open the - zip file in <c>raw</c> mode, which is faster but does not allow - a remote (erlang) file server to be used. Adding <c>cooked</c> - to the mode list will override the default and open the zip file - without the <c>raw</c> option.</p> + <p>By default, this function opens the zip file in + <c>raw</c> mode, which is faster but does not allow a remote + (Erlang) file server to be used. Adding <c>cooked</c> to the + mode list overrides the default + and opens the zip file without option <c>raw</c>.</p> </item> </taglist> </desc> </func> + <func> <name name="t" arity="1"/> - <fsummary>Print the name of each file in a zip archive</fsummary> + <fsummary>Print the name of each file in a zip archive.</fsummary> <desc> - <p>The <marker id="t_1"></marker><c>t/1</c> function prints the names - of all files in the zip archive <c><anno>Archive</anno></c> to the Erlang shell. - (Similar to "<c>tar t</c>".)</p> + <p>Prints all filenames in the zip archive <c><anno>Archive</anno></c> + to the Erlang shell. (Similar to <c>tar t</c>.)</p> </desc> </func> + <func> <name name="tt" arity="1"/> - <fsummary>Print name and information for each file in a zip archive</fsummary> + <fsummary>Print name and information for each file in a zip archive. + </fsummary> <desc> - <p>The <marker id="tt_1"></marker><c>tt/1</c> function prints names and - information about all files in the zip archive <c><anno>Archive</anno></c> to - the Erlang shell. (Similar to "<c>tar tv</c>".)</p> + <p>Prints filenames and information about all files in the zip archive + <c><anno>Archive</anno></c> to the Erlang shell. + (Similar to <c>tar tv</c>.)</p> </desc> </func> + <func> - <name name="zip_open" arity="1"/> - <name name="zip_open" arity="2"/> - <fsummary>Open an archive and return a handle to it</fsummary> + <name name="unzip" arity="1"/> + <name name="unzip" arity="2"/> + <name name="extract" arity="1"/> + <name name="extract" arity="2"/> + <fsummary>Extract files from a zip archive.</fsummary> <desc> - <p>The <marker id="zip_open"></marker><c>zip_open</c> function - opens a - zip archive, and reads and saves its directory. This - means that subsequently reading files from the archive will be - faster than unzipping files one at a time with <c>unzip</c>.</p> - <p>The archive must be closed with <c>zip_close/1</c>.</p> - <p>The <c><anno>ZipHandle</anno></c> will be closed if the - process which originally opened the archive dies.</p> + <p><c>unzip/1</c> extracts all files from a zip archive.</p> + <p><c>unzip/2</c> provides options to extract some files, and more.</p> + <p><c>extract/1</c> and <c>extract/2</c> are provided as synonyms + to resemble module + <seealso marker="erl_tar"><c>erl_tar</c></seealso>.</p> + <p>If argument <c><anno>Archive</anno></c> is specified as a binary, + the contents of the binary is assumed to be a zip archive, + otherwise a filename.</p> + <p>Options:</p> + <taglist> + <tag><c>{file_list, <anno>FileList</anno>}</c></tag> + <item> + <p>By default, all files are extracted from the zip + archive. With option <c>{file_list, <anno>FileList</anno>}</c>, + function <c>unzip/2</c> only extracts the files + whose names are included in <c><anno>FileList</anno></c>. The full + paths, including the names of all subdirectories within + the zip archive, must be specified.</p> + </item> + <tag><c>cooked</c></tag> + <item> + <p>By default, this function opens the + zip file in <c>raw</c> mode, which is faster but does not allow + a remote (Erlang) file server to be used. Adding <c>cooked</c> + to the mode list overrides the default and opens the zip file + without option <c>raw</c>. The same applies for the files + extracted.</p> + </item> + <tag><c>keep_old_files</c></tag> + <item> + <p>By default, all files with the same name as files in + the zip archive are overwritten. With option <c>keep_old_files</c> + set, function <c>unzip/2</c> does not overwrite existing files. + Notice that + even with option <c>memory</c> specified, which + means that no files are overwritten, existing files are + excluded from the result.</p> + </item> + <tag><c>verbose</c></tag> + <item> + <p>Prints an informational message for each extracted file.</p> + </item> + <tag><c>memory</c></tag> + <item> + <p>Instead of extracting to the current directory, + the result is given as a list of tuples + <c>{Filename, Binary}</c>, where <c>Binary</c> is a binary + containing the extracted data of file <c>Filename</c> + in the zip archive.</p> + </item> + <tag><c>{cwd, CWD}</c></tag> + <item> + <p>Uses the specified directory as current directory. It is + prepended to filenames when extracting them from the + zip archive. (Acting like + <seealso marker="kernel:file#set_cwd/1"> + <c>file:set_cwd/1</c></seealso> in <c>Kernel</c>, + but without changing the global <c>cwd</c> property.)</p> + </item> + </taglist> </desc> </func> + <func> - <name name="zip_list_dir" arity="1"/> - <fsummary>Return a table of files in open zip archive</fsummary> + <name name="zip" arity="2"/> + <name name="zip" arity="3"/> + <name name="create" arity="2"/> + <name name="create" arity="3"/> + <fsummary>Create a zip archive with options.</fsummary> <desc> - <p>The <marker id="zip_list_dir"></marker> - <c>zip_list_dir/1</c> function - returns the file list of an open zip archive. The first returned - element is the zip archive comment.</p> + <p>Creates a zip archive containing the files specified in + <c><anno>FileList</anno></c>.</p> + <p><c>create/2</c> and <c>create/3</c> are provided as synonyms + to resemble module + <seealso marker="erl_tar"><c>erl_tar</c></seealso>.</p> + <p><c><anno>FileList</anno></c> is a list of files, with paths relative + to the current directory, which are stored with this path in the + archive. Files can also be specified with data in binaries + to create an archive directly from data.</p> + <p>Files are compressed using the DEFLATE compression, as + described in the "Appnote.txt" file. However, files are + stored without compression if they are already compressed. + <c>zip/2</c> and <c>zip/3</c> check the file extension + to determine if the file is to be stored without compression. + Files with the following extensions are not compressed: + <c>.Z</c>, <c>.zip</c>, <c>.zoo</c>, <c>.arc</c>, <c>.lzh</c>, + <c>.arj</c>.</p> + <p>It is possible to override the default behavior and control + what types of files that are to be compressed by using options + <c>{compress, <anno>What</anno>}</c> and + <c>{uncompress, <anno>What</anno>}</c>. It is also possible to use + many <c>compress</c> and <c>uncompress</c> options.</p> + <p>To trigger file compression, its extension must match with the + <c>compress</c> condition and must not match the + <c>uncompress</c> condition. For example, if <c>compress</c> is + set to <c>["gif", "jpg"]</c> and <c>uncompress</c> is set to + <c>["jpg"]</c>, only files with extension <c>"gif"</c> are + compressed.</p> + <marker id="zip_options"></marker> + <p>Options:</p> + <taglist> + <tag><c>cooked</c></tag> + <item> + <p>By default, this function opens the + zip file in mode <c>raw</c>, which is faster but does not allow + a remote (Erlang) file server to be used. Adding <c>cooked</c> + to the mode list overrides the default and opens the zip file + without the <c>raw</c> option. The same applies for the files + added.</p> + </item> + <tag><c>verbose</c></tag> + <item> + <p>Prints an informational message about each added file.</p> + </item> + <tag><c>memory</c></tag> + <item> + <p>The output is not to a file, but instead as a tuple + <c>{<anno>FileName</anno>, binary()}</c>. The binary is a full zip + archive with header and can be extracted with, for example, + <seealso marker="#unzip/2"><c>unzip/2</c></seealso>.</p> + </item> + <tag><c>{comment, <anno>Comment</anno>}</c></tag> + <item> + <p>Adds a comment to the zip archive.</p> + </item> + <tag><c>{cwd, <anno>CWD</anno>}</c></tag> + <item> + <p>Uses the specified directory as current work directory + (<c>cwd</c>). This is prepended to filenames when adding them, + although not in the zip archive (acting like + <seealso marker="kernel:file#set_cwd/1"> + <c>file:set_cwd/1</c></seealso> in <c>Kernel</c>, but without + changing the global <c>cwd</c> property.).</p> + </item> + <tag><c>{compress, <anno>What</anno>}</c></tag> + <item> + <p>Controls what types of files to be compressed. Defaults to + <c>all</c>. The following values of <c>What</c> are allowed:</p> + <taglist> + <tag><c>all</c></tag> + <item> + <p>All files are compressed (as long + as they pass the <c>uncompress</c> condition).</p> + </item> + <tag><c>[<anno>Extension</anno>]</c></tag> + <item> + <p>Only files with exactly these extensions + are compressed.</p> + </item> + <tag><c>{add,[<anno>Extension</anno>]}</c></tag> + <item> + <p>Adds these extensions to the list of compress + extensions.</p> + </item> + <tag><c>{del,[<anno>Extension</anno>]}</c></tag> + <item> + <p>Deletes these extensions from the list of compress + extensions.</p> + </item> + </taglist> + </item> + <tag><c>{uncompress, <anno>What</anno>}</c></tag> + <item> + <p>Controls what types of files to be uncompressed. Defaults to + <c>[".Z", ".zip", ".zoo", ".arc", ".lzh", ".arj"]</c>. + The following values of <c>What</c> are allowed:</p> + <taglist> + <tag><c>all</c></tag> + <item> + <p>No files are compressed.</p> + </item> + <tag><c>[<anno>Extension</anno>]</c></tag> + <item> + <p>Files with these extensions are uncompressed.</p> + </item> + <tag><c>{add,[<anno>Extension</anno>]}</c></tag> + <item> + <p>Adds these extensions to the list of uncompress + extensions.</p> + </item> + <tag><c>{del,[<anno>Extension</anno>]}</c></tag> + <item> + <p>Deletes these extensions from the list of uncompress + extensions.</p> + </item> + </taglist> + </item> + </taglist> </desc> </func> + + <func> + <name name="zip_close" arity="1"/> + <fsummary>Close an open archive.</fsummary> + <desc> + <p>Closes a zip archive, previously opened with + <seealso marker="#zip_open/1"><c>zip_open/1,2</c></seealso>. + All resources are closed, and the handle is not to be used after + closing.</p> + </desc> + </func> + <func> <name name="zip_get" arity="1"/> <name name="zip_get" arity="2"/> - <fsummary>Extract files from an open archive</fsummary> + <fsummary>Extract files from an open archive.</fsummary> <desc> - <p>The <marker id="zip_get"></marker><c>zip_get</c> function extracts - one or all files from an open archive.</p> - <p>The files will be unzipped to memory or to file, depending on - the options given to the <c>zip_open</c> function when the - archive was opened.</p> + <p>Extracts one or all files from an open archive.</p> + <p>The files are unzipped to memory or to file, depending on + the options specified to function + <seealso marker="#zip_open/1"><c>zip_open/1,2</c></seealso> + when opening the archive.</p> </desc> </func> + <func> - <name name="zip_close" arity="1"/> - <fsummary>Close an open archive</fsummary> + <name name="zip_list_dir" arity="1"/> + <fsummary>Return a table of files in open zip archive.</fsummary> <desc> - <p>The <marker id="zip_close"></marker><c>zip_close/1</c> function - closes a zip archive, previously opened with <c>zip_open</c>. All - resources are closed, and the handle should not be used after - closing.</p> + <p>Returns the file list of an open zip archive. The first returned + element is the zip archive comment.</p> + </desc> + </func> + + <func> + <name name="zip_open" arity="1"/> + <name name="zip_open" arity="2"/> + <fsummary>Open an archive and return a handle to it.</fsummary> + <desc> + <p>Opens a zip archive, and reads and saves its directory. This + means that later reading files from the archive is + faster than unzipping files one at a time with + <seealso marker="#unzip/1"><c>unzip/1,2</c></seealso>.</p> + <p>The archive must be closed with + <seealso marker="#zip_close/1"><c>zip_close/1</c></seealso>.</p> + <p>The <c><anno>ZipHandle</anno></c> is closed if the + process that originally opened the archive dies.</p> </desc> </func> </funcs> |