%% %% %CopyrightBegin% %% %% Copyright Ericsson AB 2006-2010. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. %% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. %% %% %CopyrightEnd% %% -module(zip). %% Basic api -export([unzip/1, unzip/2, extract/1, extract/2, zip/2, zip/3, create/2, create/3, foldl/3, list_dir/1, list_dir/2, table/1, table/2, t/1, tt/1]). %% unzipping peicemeal -export([openzip_open/1, openzip_open/2, openzip_get/1, openzip_get/2, openzip_t/1, openzip_tt/1, openzip_list_dir/1, openzip_list_dir/2, openzip_close/1]). %% openzip_add/2]). %% zip server -export([zip_open/1, zip_open/2, zip_get/1, zip_get/2, zip_t/1, zip_tt/1, zip_list_dir/1, zip_list_dir/2, zip_close/1]). %% just for debugging zip server, not documented, not tested, not to be used -export([zip_get_state/1]). %% includes -include("file.hrl"). % #file_info -include("zip.hrl"). % #zip_file, #zip_comment %% max bytes fed to zlib -define(WRITE_BLOCK_SIZE, 8*1024). %% for debugging, to turn off catch -define(CATCH, catch). %% option sets -record(unzip_opts, { output, % output object (fun) input, % input object (fun) file_filter, % file filter (boolean fun) open_opts, % options passed to file:open feedback, % feeback (fun) cwd % directory to relate paths to }). -record(zip_opts, { output, % output object (fun) input, % input object (fun) comment, % zip-file comment open_opts, % options passed to file:open feedback, % feeback (fun) cwd, % directory to relate paths to compress, % compress files with these suffixes uncompress % uncompress files with these suffixes }). -record(list_dir_opts, { input, % input object (fun) raw_iterator, % applied to each dir entry open_opts % options passed to file:open }). -record(openzip_opts, { output, % output object (fun) open_opts, % file:open options cwd % directory to relate paths to }). % openzip record, state for an open zip-file -record(openzip, { zip_comment, % zip archive comment files, % filenames, infos, comments and offsets in, % archive handle input, % archive io object (fun) output, % output io object (fun) zlib, % handle to open zlib cwd % directory to relate paths to }). % Things that I would like to add to the public record #zip_file, % but can't as it would make things fail at upgrade. % Instead we use {#zip_file,#zip_file_extra} internally. -record(zip_file_extra, { crc32 % checksum }). %% max bytes read from files and archives (and fed to zlib) -define(READ_BLOCK_SIZE, 16*1024). %% -record(primzip_file, { %% name, %% offset, %% chunk_size %% }). %% -record(primzip, { %% zlib, % handle to the zlib port from zlib:open %% input, % fun/2 for file/memory input %% in, % input (file handle or binary) %% files % [#primzip_file] %% }). %% ZIP-file format records and defines %% compression methods -define(STORED, 0). -define(UNCOMPRESSED, 0). -define(SHRUNK, 1). -define(REDUCED_1, 2). -define(REDUCED_2, 3). -define(REDUCED_3, 4). -define(REDUCED_4, 5). -define(IMPLODED, 6). -define(TOKENIZED, 7). -define(DEFLATED, 8). -define(DEFLATED_64, 9). -define(PKWARE_IMPLODED, 10). -define(PKWARE_RESERVED, 11). -define(BZIP2_COMPRESSED, 12). %% zip-file records -define(LOCAL_FILE_MAGIC,16#04034b50). -define(LOCAL_FILE_HEADER_SZ,(4+2+2+2+2+2+4+4+4+2+2)). -define(LOCAL_FILE_HEADER_CRC32_OFFSET, 4+2+2+2+2+2). -record(local_file_header, {version_needed, gp_flag, comp_method, last_mod_time, last_mod_date, crc32, comp_size, uncomp_size, file_name_length, extra_field_length}). -define(CENTRAL_FILE_HEADER_SZ,(4+2+2+2+2+2+2+4+4+4+2+2+2+2+2+4+4)). -define(CENTRAL_DIR_MAGIC, 16#06054b50). -define(CENTRAL_DIR_SZ, (4+2+2+2+2+4+4+2)). -define(CENTRAL_DIR_DIGITAL_SIG_MAGIC, 16#05054b50). -define(CENTRAL_DIR_DIGITAL_SIG_SZ, (4+2)). -define(CENTRAL_FILE_MAGIC, 16#02014b50). -record(cd_file_header, {version_made_by, version_needed, gp_flag, comp_method, last_mod_time, last_mod_date, crc32, comp_size, uncomp_size, file_name_length, extra_field_length, file_comment_length, disk_num_start, internal_attr, external_attr, local_header_offset}). %% Unix extra fields (not yet supported) -define(UNIX_EXTRA_FIELD_TAG, 16#000d). -record(unix_extra_field, {atime, mtime, uid, gid}). %% extended timestamps (not yet supported) -define(EXTENDED_TIMESTAMP_TAG, 16#5455). %% -record(extended_timestamp, {mtime, %% atime, %% ctime}). -define(END_OF_CENTRAL_DIR_MAGIC, 16#06054b50). -define(END_OF_CENTRAL_DIR_SZ, (4+2+2+2+2+4+4+2)). -record(eocd, {disk_num, start_disk_num, entries_on_disk, entries, size, offset, zip_comment_length}). %% Open a zip archive with options %% openzip_open(F) -> openzip_open(F, []). openzip_open(F, Options) -> case ?CATCH do_openzip_open(F, Options) of {ok, OpenZip} -> {ok, OpenZip}; Error -> {error, Error} end. do_openzip_open(F, Options) -> Opts = get_openzip_options(Options), #openzip_opts{output = Output, open_opts = OpO, cwd = CWD} = Opts, Input = get_zip_input(F), In0 = Input({open, F, OpO -- [write]}, []), {[#zip_comment{comment = C} | Files], In1} = get_central_dir(In0, fun raw_file_info_etc/5, Input), Z = zlib:open(), {ok, #openzip{zip_comment = C, files = Files, in = In1, input = Input, output = Output, zlib = Z, cwd = CWD}}. %% retrieve all files from an open archive openzip_get(OpenZip) -> case ?CATCH do_openzip_get(OpenZip) of {ok, Result} -> {ok, Result}; Error -> {error, Error} end. do_openzip_get(#openzip{files = Files, in = In0, input = Input, output = Output, zlib = Z, cwd = CWD}) -> ZipOpts = #unzip_opts{output = Output, input = Input, file_filter = fun all/1, open_opts = [], feedback = fun silent/1, cwd = CWD}, R = get_z_files(Files, Z, In0, ZipOpts, []), {ok, R}; do_openzip_get(_) -> throw(einval). %% retrieve a file from an open archive openzip_get(FileName, OpenZip) -> case ?CATCH do_openzip_get(FileName, OpenZip) of {ok, Result} -> {ok, Result}; Error -> {error, Error} end. do_openzip_get(F, #openzip{files = Files, in = In0, input = Input, output = Output, zlib = Z, cwd = CWD}) -> %%case lists:keysearch(F, #zip_file.name, Files) of case file_name_search(F, Files) of {#zip_file{offset = Offset},_}=ZFile -> In1 = Input({seek, bof, Offset}, In0), case get_z_file(In1, Z, Input, Output, [], fun silent/1, CWD, ZFile) of {file, R, _In2} -> {ok, R}; _ -> throw(file_not_found) end; _ -> throw(file_not_found) end; do_openzip_get(_, _) -> throw(einval). file_name_search(Name,Files) -> case lists:dropwhile(fun({ZipFile,_}) -> ZipFile#zip_file.name =/= Name end, Files) of [ZFile|_] -> ZFile; [] -> false end. %% %% add a file to an open archive %% openzip_add(File, OpenZip) -> %% case ?CATCH do_openzip_add(File, OpenZip) of %% {ok, Result} -> {ok, Result}; %% Error -> {error, Error} %% end. %% do_openzip_add(File, #open_zip{files = Files, in = In0, %% opts = Opts} = OpenZip0) -> %% throw(nyi), %% Z = zlib:open(), %% R = get_z_files(Files, In0, Z, Opts, []), %% zlib:close(Z), %% {ok, R}; %% do_openzip_add(_, _) -> %% throw(einval). %% get file list from open archive openzip_list_dir(#openzip{zip_comment = Comment, files = Files}) -> {ZipFiles,_Extras} = lists:unzip(Files), {ok, [#zip_comment{comment = Comment} | ZipFiles]}; openzip_list_dir(_) -> {error, einval}. openzip_list_dir(#openzip{files = Files}, [names_only]) -> {ZipFiles,_Extras} = lists:unzip(Files), Names = [Name || {#zip_file{name=Name},_} <- ZipFiles], {ok, Names}; openzip_list_dir(_, _) -> {error, einval}. %% close an open archive openzip_close(#openzip{in = In0, input = Input, zlib = Z}) -> Input(close, In0), zlib:close(Z); openzip_close(_) -> {error, einval}. %% Extract from a zip archive with options %% %% Accepted options: %% verbose, cooked, file_list, keep_old_files, file_filter, memory unzip(F) -> unzip(F, []). unzip(F, Options) -> case ?CATCH do_unzip(F, Options) of {ok, R} -> {ok, R}; Error -> {error, Error} end. do_unzip(F, Options) -> Opts = get_unzip_options(F, Options), #unzip_opts{input = Input, open_opts = OpO} = Opts, In0 = Input({open, F, OpO -- [write]}, []), RawIterator = fun raw_file_info_etc/5, {Info, In1} = get_central_dir(In0, RawIterator, Input), %% get rid of zip-comment Z = zlib:open(), Files = get_z_files(Info, Z, In1, Opts, []), zlib:close(Z), Input(close, In1), {ok, Files}. %% Iterate over all files in a zip archive foldl(Fun, Acc0, Archive) when is_function(Fun, 4) -> ZipFun = fun({Name, GetInfo, GetBin}, A) -> A2 = Fun(Name, GetInfo, GetBin, A), {true, false, A2} end, case prim_zip:open(ZipFun, Acc0, Archive) of {ok, PrimZip, Acc1} -> ok = prim_zip:close(PrimZip), {ok, Acc1}; {error, bad_eocd} -> {error, "Not an archive file"}; {error, Reason} -> {error, Reason} end; foldl(_,_, _) -> {error, einval}. %% Create zip archive name F from Files or binaries %% %% Accepted options: %% verbose, cooked, memory, comment zip(F, Files) -> zip(F, Files, []). zip(F, Files, Options) -> case ?CATCH do_zip(F, Files, Options) of {ok, R} -> {ok, R}; Error -> {error, Error} end. do_zip(F, Files, Options) -> Opts = get_zip_options(Files, Options), #zip_opts{output = Output, open_opts = OpO} = Opts, Out0 = Output({open, F, OpO}, []), Z = zlib:open(), {Out1, LHS, Pos} = put_z_files(Files, Z, Out0, 0, Opts, []), zlib:close(Z), Out2 = put_central_dir(LHS, Pos, Out1, Opts), Out3 = Output({close, F}, Out2), {ok, Out3}. %% List zip directory contents %% %% Accepted options: %% cooked, file_filter, file_output (latter 2 undocumented) list_dir(F) -> list_dir(F, []). list_dir(F, Options) -> case ?CATCH do_list_dir(F, Options) of {ok, R} -> {ok, R}; Error -> {error, Error} end. do_list_dir(F, Options) -> Opts = get_list_dir_options(F, Options), #list_dir_opts{input = Input, open_opts = OpO, raw_iterator = RawIterator} = Opts, In0 = Input({open, F, OpO}, []), {Info, In1} = get_central_dir(In0, RawIterator, Input), Input(close, In1), {ok, Info}. %% Print zip directory in short form t(F) when is_pid(F) -> zip_t(F); t(F) when is_record(F, openzip) -> openzip_t(F); t(F) -> t(F, fun raw_short_print_info_etc/5). t(F, RawPrint) -> case ?CATCH do_t(F, RawPrint) of ok -> ok; Error -> {error, Error} end. do_t(F, RawPrint) -> Input = get_input(F), OpO = [raw], In0 = Input({open, F, OpO}, []), {_Info, In1} = get_central_dir(In0, RawPrint, Input), Input(close, In1), ok. %% Print zip directory in long form (like ls -l) tt(F) when is_pid(F) -> zip_tt(F); tt(F) when is_record(F, openzip) -> openzip_tt(F); tt(F) -> t(F, fun raw_long_print_info_etc/5). %% option utils get_unzip_opt([], Opts) -> Opts; get_unzip_opt([verbose | Rest], Opts) -> get_unzip_opt(Rest, Opts#unzip_opts{feedback = fun verbose_unzip/1}); get_unzip_opt([cooked | Rest], #unzip_opts{open_opts = OpO} = Opts) -> get_unzip_opt(Rest, Opts#unzip_opts{open_opts = OpO -- [raw]}); get_unzip_opt([memory | Rest], Opts) -> get_unzip_opt(Rest, Opts#unzip_opts{output = fun binary_io/2}); get_unzip_opt([{cwd, CWD} | Rest], Opts) -> get_unzip_opt(Rest, Opts#unzip_opts{cwd = CWD}); get_unzip_opt([{file_filter, F} | Rest], Opts) -> Filter1 = fun({ZipFile,_Extra}) -> F(ZipFile) end, Filter2 = fun_and_1(Filter1, Opts#unzip_opts.file_filter), get_unzip_opt(Rest, Opts#unzip_opts{file_filter = Filter2}); get_unzip_opt([{file_list, L} | Rest], Opts) -> FileInList = fun(F) -> file_in_list(F, L) end, Filter = fun_and_1(FileInList, Opts#unzip_opts.file_filter), get_unzip_opt(Rest, Opts#unzip_opts{file_filter = Filter}); get_unzip_opt([keep_old_files | Rest], Opts) -> Keep = fun keep_old_file/1, Filter = fun_and_1(Keep, Opts#unzip_opts.file_filter), get_unzip_opt(Rest, Opts#unzip_opts{file_filter = Filter}); get_unzip_opt([Unknown | _Rest], _Opts) -> throw({bad_option, Unknown}). get_list_dir_opt([], Opts) -> Opts; get_list_dir_opt([cooked | Rest], #list_dir_opts{open_opts = OpO} = Opts) -> get_list_dir_opt(Rest, Opts#list_dir_opts{open_opts = OpO -- [raw]}); get_list_dir_opt([names_only | Rest], Opts) -> get_list_dir_opt(Rest, Opts#list_dir_opts{ raw_iterator = fun(A, B, C, D, E) -> raw_name_only(A, B, C, D, E) end}); %% get_list_dir_opt([{file_output, F} | Rest], Opts) -> %% get_list_dir_opt(Rest, Opts#list_dir_opts{file_output = F}); %% get_list_dir_opt([{file_filter, F} | Rest], Opts) -> %% get_list_dir_opt(Rest, Opts#list_dir_opts{file_filter = F}); get_list_dir_opt([Unknown | _Rest], _Opts) -> throw({bad_option, Unknown}). get_zip_opt([], Opts) -> Opts; get_zip_opt([verbose | Rest], Opts) -> get_zip_opt(Rest, Opts#zip_opts{feedback = fun verbose_zip/1}); get_zip_opt([cooked | Rest], #zip_opts{open_opts = OpO} = Opts) -> get_zip_opt(Rest, Opts#zip_opts{open_opts = OpO -- [raw]}); get_zip_opt([memory | Rest], Opts) -> get_zip_opt(Rest, Opts#zip_opts{output = fun binary_io/2}); get_zip_opt([{cwd, CWD} | Rest], Opts) -> get_zip_opt(Rest, Opts#zip_opts{cwd = CWD}); get_zip_opt([{comment, C} | Rest], Opts) -> get_zip_opt(Rest, Opts#zip_opts{comment = C}); get_zip_opt([{compress, Which} = O| Rest], Opts) -> Which2 = case Which of all -> all; Suffixes when is_list(Suffixes) -> lists:usort(Suffixes); {add, Suffixes} when is_list(Suffixes) -> lists:usort(Opts#zip_opts.compress ++ Suffixes); {del, Suffixes} when is_list(Suffixes) -> lists:usort(Opts#zip_opts.compress -- Suffixes); _ -> throw({bad_option, O}) end, get_zip_opt(Rest, Opts#zip_opts{compress = Which2}); get_zip_opt([{uncompress, Which} = O| Rest], Opts) -> Which2 = case Which of all -> all; Suffixes when is_list(Suffixes) -> lists:usort(Suffixes); {add, Suffixes} when is_list(Suffixes) -> lists:usort(Opts#zip_opts.uncompress ++ Suffixes); {del, Suffixes} when is_list(Suffixes) -> lists:usort(Opts#zip_opts.uncompress -- Suffixes); _ -> throw({bad_option, O}) end, get_zip_opt(Rest, Opts#zip_opts{uncompress = Which2}); get_zip_opt([Unknown | _Rest], _Opts) -> throw({bad_option, Unknown}). %% feedback funs silent(_) -> ok. verbose_unzip(FN) -> io:format("extracting: ~p\n", [FN]). verbose_zip(FN) -> io:format("adding: ~p\n", [FN]). %% file filter funs all(_) -> true. file_in_list({#zip_file{name = FileName},_}, List) -> lists:member(FileName, List); file_in_list(_, _) -> false. keep_old_file({#zip_file{name = FileName},_}) -> not (filelib:is_file(FileName) orelse filelib:is_dir(FileName)); keep_old_file(_) -> false. %% fun combiner fun_and_1(Fun1, Fun2) -> fun(A) -> Fun1(A) andalso Fun2(A) end. %% getting options get_zip_options(Files, Options) -> Suffixes = [".Z", ".zip", ".zoo", ".arc", ".lzh", ".arj"], Opts = #zip_opts{output = fun file_io/2, input = get_zip_input({files, Files}), open_opts = [raw, write], comment = "", feedback = fun silent/1, cwd = "", compress = all, uncompress = Suffixes }, get_zip_opt(Options, Opts). get_unzip_options(F, Options) -> Opts = #unzip_opts{file_filter = fun all/1, output = fun file_io/2, input = get_input(F), open_opts = [raw], feedback = fun silent/1, cwd = "" }, get_unzip_opt(Options, Opts). get_openzip_options(Options) -> Opts = #openzip_opts{open_opts = [raw, read], output = fun file_io/2, cwd = ""}, get_openzip_opt(Options, Opts). get_input(F) when is_binary(F) -> fun binary_io/2; get_input(F) when is_list(F) -> fun file_io/2; get_input(_) -> throw(einval). get_zip_input({F, B}) when is_binary(B), is_list(F) -> fun binary_io/2; get_zip_input({F, B, #file_info{}}) when is_binary(B), is_list(F) -> fun binary_io/2; get_zip_input({F, #file_info{}, B}) when is_binary(B), is_list(F) -> fun binary_io/2; get_zip_input(F) when is_list(F) -> fun file_io/2; get_zip_input({files, []}) -> fun binary_io/2; get_zip_input({files, [File | _]}) -> get_zip_input(File); get_zip_input(_) -> throw(einval). get_list_dir_options(F, Options) -> Opts = #list_dir_opts{raw_iterator = fun raw_file_info_public/5, input = get_input(F), open_opts = [raw]}, get_list_dir_opt(Options, Opts). %% aliases for erl_tar compatibility table(F) -> list_dir(F). table(F, O) -> list_dir(F, O). create(F, Fs) -> zip(F, Fs). create(F, Fs, O) -> zip(F, Fs, O). extract(F) -> unzip(F). extract(F, O) -> unzip(F, O). %% put the central directory, at the end of the zip archive put_central_dir(LHS, Pos, Out0, #zip_opts{output = Output, comment = Comment}) -> {Out1, Sz} = put_cd_files_loop(LHS, Output, Out0, 0), put_eocd(length(LHS), Pos, Sz, Comment, Output, Out1). put_cd_files_loop([], _Output, Out, Sz) -> {Out, Sz}; put_cd_files_loop([{LH, Name, Pos} | LHRest], Output, Out0, Sz0) -> CDFH = cd_file_header_from_lh_and_pos(LH, Pos), BCDFH = cd_file_header_to_bin(CDFH), B = [<<?CENTRAL_FILE_MAGIC:32/little>>, BCDFH, Name], Out1 = Output({write, B}, Out0), Sz1 = Sz0 + ?CENTRAL_FILE_HEADER_SZ + LH#local_file_header.file_name_length, put_cd_files_loop(LHRest, Output, Out1, Sz1). %% put end marker of central directory, the last record in the archive put_eocd(N, Pos, Sz, Comment, Output, Out0) -> %% BComment = list_to_binary(Comment), CommentSz = length(Comment), % size(BComment), EOCD = #eocd{disk_num = 0, start_disk_num = 0, entries_on_disk = N, entries = N, size = Sz, offset = Pos, zip_comment_length = CommentSz}, BEOCD = eocd_to_bin(EOCD), B = [<<?END_OF_CENTRAL_DIR_MAGIC:32/little>>, BEOCD, Comment], % BComment], Output({write, B}, Out0). get_filename({Name, _}, Type) -> get_filename(Name, Type); get_filename({Name, _, _}, Type) -> get_filename(Name, Type); get_filename(Name, regular) -> Name; get_filename(Name, directory) -> %% Ensure trailing slash case lists:reverse(Name) of [$/ | _Rev] -> Name; Rev -> lists:reverse([$/ | Rev]) end. add_cwd(_CWD, {_Name, _} = F) -> F; add_cwd("", F) -> F; add_cwd(CWD, F) -> filename:join(CWD, F). %% already compressed data should be stored as is in archive, %% a simple name-match is used to check for this %% files smaller than 10 bytes are also stored, not compressed get_comp_method(_, N, _, _) when is_integer(N), N < 10 -> ?STORED; get_comp_method(_, _, _, directory) -> ?STORED; get_comp_method(F, _, #zip_opts{compress = Compress, uncompress = Uncompress}, _) -> Ext = filename:extension(F), Test = fun(Which) -> (Which =:= all) orelse lists:member(Ext, Which) end, case Test(Compress) andalso not Test(Uncompress) of true -> ?DEFLATED; false -> ?STORED end. put_z_files([], _Z, Out, Pos, _Opts, Acc) -> {Out, lists:reverse(Acc, []), Pos}; put_z_files([F | Rest], Z, Out0, Pos0, #zip_opts{input = Input, output = Output, open_opts = OpO, feedback = FB, cwd = CWD} = Opts, Acc) -> In0 = [], F1 = add_cwd(CWD, F), FileInfo = Input({file_info, F1}, In0), Type = FileInfo#file_info.type, UncompSize = case Type of regular -> FileInfo#file_info.size; directory -> 0 end, FileName = get_filename(F, Type), CompMethod = get_comp_method(FileName, UncompSize, Opts, Type), LH = local_file_header_from_info_method_name(FileInfo, UncompSize, CompMethod, FileName), BLH = local_file_header_to_bin(LH), B = [<<?LOCAL_FILE_MAGIC:32/little>>, BLH], Out1 = Output({write, B}, Out0), Out2 = Output({write, FileName}, Out1), {Out3, CompSize, CRC} = put_z_file(CompMethod, UncompSize, Out2, F1, 0, Input, Output, OpO, Z, Type), FB(FileName), Patch = <<CRC:32/little, CompSize:32/little>>, Out4 = Output({pwrite, Pos0 + ?LOCAL_FILE_HEADER_CRC32_OFFSET, Patch}, Out3), Out5 = Output({seek, eof, 0}, Out4), Pos1 = Pos0 + ?LOCAL_FILE_HEADER_SZ + LH#local_file_header.file_name_length, Pos2 = Pos1 + CompSize, LH2 = LH#local_file_header{comp_size = CompSize, crc32 = CRC}, ThisAcc = [{LH2, FileName, Pos0}], {Out6, SubAcc, Pos3} = case Type of regular -> {Out5, ThisAcc, Pos2}; directory -> Files = Input({list_dir, F1}, []), RevFiles = reverse_join_files(F, Files, []), put_z_files(RevFiles, Z, Out5, Pos2, Opts, ThisAcc) end, Acc2 = lists:reverse(SubAcc) ++ Acc, put_z_files(Rest, Z, Out6, Pos3, Opts, Acc2). reverse_join_files(Dir, [File | Files], Acc) -> reverse_join_files(Dir, Files, [filename:join([Dir, File]) | Acc]); reverse_join_files(_Dir, [], Acc) -> Acc. %% flag for zlib -define(MAX_WBITS, 15). %% compress a file put_z_file(_Method, Sz, Out, _F, Pos, _Input, _Output, _OpO, _Z, directory) -> {Out, Pos + Sz, 0}; put_z_file(_Method, 0, Out, _F, Pos, _Input, _Output, _OpO, _Z, regular) -> {Out, Pos, 0}; put_z_file(?STORED, UncompSize, Out0, F, Pos0, Input, Output, OpO, Z, regular) -> In0 = [], In1 = Input({open, F, OpO -- [write]}, In0), CRC0 = zlib:crc32(Z, <<>>), {Data, In2} = Input({read, UncompSize}, In1), Out1 = Output({write, Data}, Out0), CRC = zlib:crc32(Z, CRC0, Data), Input(close, In2), {Out1, Pos0+erlang:iolist_size(Data), CRC}; put_z_file(?DEFLATED, UncompSize, Out0, F, Pos0, Input, Output, OpO, Z, regular) -> In0 = [], In1 = Input({open, F, OpO -- [write]}, In0), ok = zlib:deflateInit(Z, default, deflated, -?MAX_WBITS, 8, default), {Out1, Pos1} = put_z_data_loop(UncompSize, In1, Out0, Pos0, Input, Output, Z), CRC = zlib:crc32(Z), ok = zlib:deflateEnd(Z), Input(close, In1), {Out1, Pos1, CRC}. %% zlib is finished with the last chunk compressed get_sync(N, N) -> finish; get_sync(_, _) -> full. %% compress data put_z_data_loop(0, _In, Out, Pos, _Input, _Output, _Z) -> {Out, Pos}; put_z_data_loop(UncompSize, In0, Out0, Pos0, Input, Output, Z) -> N = erlang:min(?WRITE_BLOCK_SIZE, UncompSize), case Input({read, N}, In0) of {eof, _In1} -> {Out0, Pos0}; {Uncompressed, In1} -> Compressed = zlib:deflate(Z, Uncompressed, get_sync(N, UncompSize)), Sz = erlang:iolist_size(Compressed), Out1 = Output({write, Compressed}, Out0), put_z_data_loop(UncompSize - N, In1, Out1, Pos0 + Sz, Input, Output, Z) end. %% raw iterators over central dir %% name only raw_name_only(CD, FileName, _FileComment, _BExtraField, Acc) when is_record(CD, cd_file_header) -> [FileName | Acc]; raw_name_only(EOCD, _, _Comment, _, Acc) when is_record(EOCD, eocd) -> Acc. %% for printing directory (t/1) raw_short_print_info_etc(CD, FileName, _FileComment, _BExtraField, Acc) when is_record(CD, cd_file_header) -> print_file_name(FileName), Acc; raw_short_print_info_etc(EOCD, X, Comment, Y, Acc) when is_record(EOCD, eocd) -> raw_long_print_info_etc(EOCD, X, Comment, Y, Acc). print_file_name(FileName) -> io:format("~s\n", [FileName]). %% for printing directory (tt/1) raw_long_print_info_etc(#cd_file_header{comp_size = CompSize, uncomp_size = UncompSize, last_mod_date = LMDate, last_mod_time = LMTime}, FileName, FileComment, _BExtraField, Acc) -> MTime = dos_date_time_to_datetime(LMDate, LMTime), print_header(CompSize, MTime, UncompSize, FileName, FileComment), Acc; raw_long_print_info_etc(EOCD, _, Comment, _, Acc) when is_record(EOCD, eocd) -> print_comment(Comment), Acc. print_header(CompSize, MTime, UncompSize, FileName, FileComment) -> io:format("~8w ~s ~8w ~2w% ~s ~s\n", [CompSize, time_to_string(MTime), UncompSize, get_percent(CompSize, UncompSize), FileName, FileComment]). print_comment("") -> ok; print_comment(Comment) -> io:format("Archive comment: ~s\n", [Comment]). get_percent(_, 0) -> 100; get_percent(CompSize, Size) -> round(CompSize * 100 / Size). %% time formatting ("borrowed" from erl_tar.erl) time_to_string({{Y, Mon, Day}, {H, Min, _}}) -> io_lib:format("~s ~2w ~s:~s ~w", [month(Mon), Day, two_d(H), two_d(Min), Y]). two_d(N) -> tl(integer_to_list(N + 100)). month(1) -> "Jan"; month(2) -> "Feb"; month(3) -> "Mar"; month(4) -> "Apr"; month(5) -> "May"; month(6) -> "Jun"; month(7) -> "Jul"; month(8) -> "Aug"; month(9) -> "Sep"; month(10) -> "Oct"; month(11) -> "Nov"; month(12) -> "Dec". %% zip header functions cd_file_header_from_lh_and_pos(LH, Pos) -> #local_file_header{version_needed = VersionNeeded, gp_flag = GPFlag, comp_method = CompMethod, last_mod_time = LastModTime, last_mod_date = LastModDate, crc32 = CRC32, comp_size = CompSize, uncomp_size = UncompSize, file_name_length = FileNameLength, extra_field_length = ExtraFieldLength} = LH, #cd_file_header{version_made_by = 20, version_needed = VersionNeeded, gp_flag = GPFlag, comp_method = CompMethod, last_mod_time = LastModTime, last_mod_date = LastModDate, crc32 = CRC32, comp_size = CompSize, uncomp_size = UncompSize, file_name_length = FileNameLength, extra_field_length = ExtraFieldLength, file_comment_length = 0, % FileCommentLength, disk_num_start = 1, % DiskNumStart, internal_attr = 0, % InternalAttr, external_attr = 0, % ExternalAttr, local_header_offset = Pos}. cd_file_header_to_bin( #cd_file_header{version_made_by = VersionMadeBy, version_needed = VersionNeeded, gp_flag = GPFlag, comp_method = CompMethod, last_mod_time = LastModTime, last_mod_date = LastModDate, crc32 = CRC32, comp_size = CompSize, uncomp_size = UncompSize, file_name_length = FileNameLength, extra_field_length = ExtraFieldLength, file_comment_length = FileCommentLength, disk_num_start = DiskNumStart, internal_attr = InternalAttr, external_attr = ExternalAttr, local_header_offset = LocalHeaderOffset}) -> <<VersionMadeBy:16/little, VersionNeeded:16/little, GPFlag:16/little, CompMethod:16/little, LastModTime:16/little, LastModDate:16/little, CRC32:32/little, CompSize:32/little, UncompSize:32/little, FileNameLength:16/little, ExtraFieldLength:16/little, FileCommentLength:16/little, DiskNumStart:16/little, InternalAttr:16/little, ExternalAttr:32/little, LocalHeaderOffset:32/little>>. local_file_header_to_bin( #local_file_header{version_needed = VersionNeeded, gp_flag = GPFlag, comp_method = CompMethod, last_mod_time = LastModTime, last_mod_date = LastModDate, crc32 = CRC32, comp_size = CompSize, uncomp_size = UncompSize, file_name_length = FileNameLength, extra_field_length = ExtraFieldLength}) -> <<VersionNeeded:16/little, GPFlag:16/little, CompMethod:16/little, LastModTime:16/little, LastModDate:16/little, CRC32:32/little, CompSize:32/little, UncompSize:32/little, FileNameLength:16/little, ExtraFieldLength:16/little>>. eocd_to_bin(#eocd{disk_num = DiskNum, start_disk_num = StartDiskNum, entries_on_disk = EntriesOnDisk, entries = Entries, size = Size, offset = Offset, zip_comment_length = ZipCommentLength}) -> <<DiskNum:16/little, StartDiskNum:16/little, EntriesOnDisk:16/little, Entries:16/little, Size:32/little, Offset:32/little, ZipCommentLength:16/little>>. %% put together a local file header local_file_header_from_info_method_name(#file_info{mtime = MTime}, UncompSize, CompMethod, Name) -> {ModDate, ModTime} = dos_date_time_from_datetime(MTime), #local_file_header{version_needed = 20, gp_flag = 0, comp_method = CompMethod, last_mod_time = ModTime, last_mod_date = ModDate, crc32 = -1, comp_size = -1, uncomp_size = UncompSize, file_name_length = length(Name), extra_field_length = 0}. %% small, simple, stupid zip-archive server server_loop(OpenZip) -> receive {From, {open, Archive, Options}} -> case openzip_open(Archive, Options) of {ok, NewOpenZip} -> From ! {self(), {ok, self()}}, server_loop(NewOpenZip); Error -> From ! {self(), Error} end; {From, close} -> From ! {self(), openzip_close(OpenZip)}; {From, get} -> From ! {self(), openzip_get(OpenZip)}, server_loop(OpenZip); {From, {get, FileName}} -> From ! {self(), openzip_get(FileName, OpenZip)}, server_loop(OpenZip); {From, list_dir} -> From ! {self(), openzip_list_dir(OpenZip)}, server_loop(OpenZip); {From, {list_dir, Opts}} -> From ! {self(), openzip_list_dir(OpenZip, Opts)}, server_loop(OpenZip); {From, get_state} -> From ! {self(), OpenZip}, server_loop(OpenZip); _ -> {error, bad_msg} end. zip_open(Archive) -> zip_open(Archive, []). zip_open(Archive, Options) -> Pid = spawn(fun() -> server_loop(not_open) end), request(self(), Pid, {open, Archive, Options}). zip_get(Pid) when is_pid(Pid) -> request(self(), Pid, get). zip_close(Pid) when is_pid(Pid) -> request(self(), Pid, close). zip_get(FileName, Pid) when is_pid(Pid) -> request(self(), Pid, {get, FileName}). zip_list_dir(Pid) when is_pid(Pid) -> request(self(), Pid, list_dir). zip_list_dir(Pid, Opts) when is_pid(Pid) -> request(self(), Pid, {list_dir, Opts}). zip_get_state(Pid) when is_pid(Pid) -> request(self(), Pid, get_state). request(Self, Pid, Req) -> Pid ! {Self, Req}, receive {Pid, R} -> R end. zip_t(Pid) when is_pid(Pid) -> Openzip = request(self(), Pid, get_state), openzip_t(Openzip). zip_tt(Pid) when is_pid(Pid) -> Openzip = request(self(), Pid, get_state), openzip_tt(Openzip). openzip_tt(#openzip{zip_comment = ZipComment, files = Files}) -> print_comment(ZipComment), lists_foreach(fun({#zip_file{comp_size = CompSize, name = FileName, comment = FileComment, info = FI},_}) -> #file_info{size = UncompSize, mtime = MTime} = FI, print_header(CompSize, MTime, UncompSize, FileName, FileComment) end, Files), ok. openzip_t(#openzip{zip_comment = ZipComment, files = Files}) -> print_comment(ZipComment), lists_foreach(fun({#zip_file{name = FileName},_}) -> print_file_name(FileName) end, Files), ok. lists_foreach(_, []) -> ok; lists_foreach(F, [Hd|Tl]) -> F(Hd), lists_foreach(F, Tl). %% option utils get_openzip_opt([], Opts) -> Opts; get_openzip_opt([cooked | Rest], #openzip_opts{open_opts = OO} = Opts) -> get_openzip_opt(Rest, Opts#openzip_opts{open_opts = OO -- [raw]}); get_openzip_opt([memory | Rest], Opts) -> get_openzip_opt(Rest, Opts#openzip_opts{output = fun binary_io/2}); get_openzip_opt([{cwd, CWD} | Rest], Opts) -> get_openzip_opt(Rest, Opts#openzip_opts{cwd = CWD}); get_openzip_opt([Unknown | _Rest], _Opts) -> throw({bad_option, Unknown}). %% get the central directory from the archive get_central_dir(In0, RawIterator, Input) -> {B, In1} = get_end_of_central_dir(In0, ?END_OF_CENTRAL_DIR_SZ, Input), {EOCD, BComment} = eocd_and_comment_from_bin(B), In2 = Input({seek, bof, EOCD#eocd.offset}, In1), N = EOCD#eocd.entries, Acc0 = [], Out0 = RawIterator(EOCD, "", binary_to_list(BComment), <<>>, Acc0), get_cd_loop(N, In2, RawIterator, Input, Out0). get_cd_loop(0, In, _RawIterator, _Input, Acc) -> {lists:reverse(Acc), In}; get_cd_loop(N, In0, RawIterator, Input, Acc0) -> {B, In1} = Input({read, ?CENTRAL_FILE_HEADER_SZ}, In0), BCD = case B of <<?CENTRAL_FILE_MAGIC:32/little, XBCD/binary>> -> XBCD; _ -> throw(bad_central_directory) end, CD = cd_file_header_from_bin(BCD), FileNameLen = CD#cd_file_header.file_name_length, ExtraLen = CD#cd_file_header.extra_field_length, CommentLen = CD#cd_file_header.file_comment_length, ToRead = FileNameLen + ExtraLen + CommentLen, {B2, In2} = Input({read, ToRead}, In1), {FileName, Comment, BExtra} = get_name_extra_comment(B2, FileNameLen, ExtraLen, CommentLen), Acc1 = RawIterator(CD, FileName, Comment, BExtra, Acc0), get_cd_loop(N-1, In2, RawIterator, Input, Acc1). get_name_extra_comment(B, FileNameLen, ExtraLen, CommentLen) -> case B of <<BFileName:FileNameLen/binary, BExtra:ExtraLen/binary, BComment:CommentLen/binary>> -> {binary_to_list(BFileName), binary_to_list(BComment), BExtra}; _ -> throw(bad_central_directory) end. %% get end record, containing the offset to the central directory %% the end record is always at the end of the file BUT alas it is %% of variable size (yes that's dumb!) get_end_of_central_dir(_In, Sz, _Input) when Sz > 16#ffff -> throw(bad_eocd); get_end_of_central_dir(In0, Sz, Input) -> In1 = Input({seek, eof, -Sz}, In0), {B, In2} = Input({read, Sz}, In1), case find_eocd_header(B) of none -> get_end_of_central_dir(In2, Sz+Sz, Input); Header -> {Header, In2} end. %% find the end record by matching for it find_eocd_header(<<?END_OF_CENTRAL_DIR_MAGIC:32/little, Rest/binary>>) -> Rest; find_eocd_header(<<_:8, Rest/binary>>) when byte_size(Rest) > ?END_OF_CENTRAL_DIR_SZ-4 -> find_eocd_header(Rest); find_eocd_header(_) -> none. %% from a central directory record, filter and accumulate what we need %% with zip_file_extra raw_file_info_etc(CD, FileName, FileComment, BExtraField, Acc) when is_record(CD, cd_file_header) -> #cd_file_header{comp_size = CompSize, local_header_offset = Offset, crc32 = CRC} = CD, FileInfo = cd_file_header_to_file_info(FileName, CD, BExtraField), [{#zip_file{name = FileName, info = FileInfo, comment = FileComment, offset = Offset, comp_size = CompSize}, #zip_file_extra{crc32 = CRC}} | Acc]; raw_file_info_etc(EOCD, _, Comment, _, Acc) when is_record(EOCD, eocd) -> [#zip_comment{comment = Comment} | Acc]. %% without zip_file_extra raw_file_info_public(CD, FileName, FileComment, BExtraField, Acc0) -> [H1|T] = raw_file_info_etc(CD,FileName,FileComment,BExtraField,Acc0), H2 = case H1 of {ZF,Extra} when is_record(Extra,zip_file_extra) -> ZF; Other -> Other end, [H2|T]. %% make a file_info from a central directory header cd_file_header_to_file_info(FileName, #cd_file_header{uncomp_size = UncompSize, last_mod_time = ModTime, last_mod_date = ModDate}, ExtraField) -> T = dos_date_time_to_datetime(ModDate, ModTime), Type = case lists:last(FileName) of $/ -> directory; _ -> regular end, FI = #file_info{size = UncompSize, type = Type, access = read_write, atime = T, mtime = T, ctime = T, mode = 8#066, links = 1, major_device = 0, minor_device = 0, inode = 0, uid = 0, gid = 0}, add_extra_info(FI, ExtraField). %% add extra info to file (some day when we implement it) add_extra_info(FI, <<?EXTENDED_TIMESTAMP_TAG:16/little, _Rest/binary>>) -> FI; % not yet supported, some other day... add_extra_info(FI, <<?UNIX_EXTRA_FIELD_TAG:16/little, Rest/binary>>) -> _UnixExtra = unix_extra_field_and_var_from_bin(Rest), FI; % not yet supported, and not widely used add_extra_info(FI, _) -> FI. %% get all files using file list %% (the offset list is already filtered on which file to get... isn't it?) get_z_files([], _Z, _In, _Opts, Acc) -> lists:reverse(Acc); get_z_files([#zip_comment{comment = _} | Rest], Z, In, Opts, Acc) -> get_z_files(Rest, Z, In, Opts, Acc); get_z_files([{#zip_file{offset = Offset},_} = ZFile | Rest], Z, In0, #unzip_opts{input = Input, output = Output, open_opts = OpO, file_filter = Filter, feedback = FB, cwd = CWD} = Opts, Acc0) -> case Filter(ZFile) of true -> In1 = Input({seek, bof, Offset}, In0), {In2, Acc1} = case get_z_file(In1, Z, Input, Output, OpO, FB, CWD, ZFile) of {file, GZD, Inx} -> {Inx, [GZD | Acc0]}; {dir, Inx} -> {Inx, Acc0} end, get_z_files(Rest, Z, In2, Opts, Acc1); _ -> get_z_files(Rest, Z, In0, Opts, Acc0) end. %% get a file from the archive, reading chunks get_z_file(In0, Z, Input, Output, OpO, FB, CWD, {ZipFile,Extra}) -> case Input({read, ?LOCAL_FILE_HEADER_SZ}, In0) of {eof, In1} -> {eof, In1}; %% Local File Header {<<?LOCAL_FILE_MAGIC:32/little, B/binary>>, In1} -> LH = local_file_header_from_bin(B), #local_file_header{gp_flag = GPFlag, comp_method = CompMethod, file_name_length = FileNameLen, extra_field_length = ExtraLen} = LH, {CompSize,CRC32} = case GPFlag band 8 =:= 8 of true -> {ZipFile#zip_file.comp_size, Extra#zip_file_extra.crc32}; false -> {LH#local_file_header.comp_size, LH#local_file_header.crc32} end, {BFileN, In3} = Input({read, FileNameLen + ExtraLen}, In1), {FileName, _} = get_file_name_extra(FileNameLen, ExtraLen, BFileN), FileName1 = add_cwd(CWD, FileName), case lists:last(FileName) of $/ -> %% perhaps this should always be done? Output({ensure_dir,FileName1},[]), {dir, In3}; _ -> %% FileInfo = local_file_header_to_file_info(LH) %%{Out, In4, CRC, UncompSize} = {Out, In4, CRC, _UncompSize} = get_z_data(CompMethod, In3, FileName1, CompSize, Input, Output, OpO, Z), In5 = skip_z_data_descriptor(GPFlag, Input, In4), %% TODO This should be fixed some day: %% In5 = Input({set_file_info, FileName, FileInfo#file_info{size=UncompSize}}, In4), FB(FileName), CRC =:= CRC32 orelse throw({bad_crc, FileName}), {file, Out, In5} end; _ -> throw(bad_local_file_header) end. get_file_name_extra(FileNameLen, ExtraLen, B) -> case B of <<BFileName:FileNameLen/binary, BExtra:ExtraLen/binary>> -> {binary_to_list(BFileName), BExtra}; _ -> throw(bad_file_header) end. %% get compressed or stored data get_z_data(?DEFLATED, In0, FileName, CompSize, Input, Output, OpO, Z) -> ok = zlib:inflateInit(Z, -?MAX_WBITS), Out0 = Output({open, FileName, [write | OpO]}, []), {In1, Out1, UncompSize} = get_z_data_loop(CompSize, 0, In0, Out0, Input, Output, Z), CRC = zlib:crc32(Z), ?CATCH zlib:inflateEnd(Z), Out2 = Output({close, FileName}, Out1), {Out2, In1, CRC, UncompSize}; get_z_data(?STORED, In0, FileName, CompSize, Input, Output, OpO, Z) -> Out0 = Output({open, FileName, [write | OpO]}, []), CRC0 = zlib:crc32(Z, <<>>), {In1, Out1, CRC} = copy_data_loop(CompSize, In0, Out0, Input, Output, CRC0, Z), Out2 = Output({close, FileName}, Out1), {Out2, In1, CRC, CompSize}; get_z_data(_, _, _, _, _, _, _, _) -> throw(bad_file_header). copy_data_loop(0, In, Out, _Input, _Output, CRC, _Z) -> {In, Out, CRC}; copy_data_loop(CompSize, In0, Out0, Input, Output, CRC0, Z) -> N = erlang:min(?READ_BLOCK_SIZE, CompSize), case Input({read, N}, In0) of {eof, In1} -> {Out0, In1}; {Uncompressed, In1} -> CRC1 = zlib:crc32(Z, CRC0, Uncompressed), Out1 = Output({write, Uncompressed}, Out0), copy_data_loop(CompSize-N, In1, Out1, Input, Output, CRC1, Z) end. get_z_data_loop(0, UncompSize, In, Out, _Input, _Output, _Z) -> {In, Out, UncompSize}; get_z_data_loop(CompSize, UncompSize, In0, Out0, Input, Output, Z) -> N = erlang:min(?READ_BLOCK_SIZE, CompSize), case Input({read, N}, In0) of {eof, In1} -> {Out0, In1}; {Compressed, In1} -> Uncompressed = zlib:inflate(Z, Compressed), Out1 = Output({write, Uncompressed}, Out0), get_z_data_loop(CompSize-N, UncompSize + iolist_size(Uncompressed), In1, Out1, Input, Output, Z) end. %% skip data descriptor if any skip_z_data_descriptor(GPFlag, Input, In0) when GPFlag band 8 =:= 8 -> Input({seek, cur, 12}, In0); skip_z_data_descriptor(_GPFlag, _Input, In0) -> In0. %% convert between erlang datetime and the MSDOS date and time %% that's stored in the zip archive %% MSDOS Time MSDOS Date %% bit 0 - 4 5 - 10 11 - 15 16 - 20 21 - 24 25 - 31 %% value second minute hour day (1 - 31) month (1 - 12) years from 1980 dos_date_time_to_datetime(DosDate, DosTime) -> <<Hour:5, Min:6, Sec:5>> = <<DosTime:16>>, <<YearFrom1980:7, Month:4, Day:5>> = <<DosDate:16>>, {{YearFrom1980+1980, Month, Day}, {Hour, Min, Sec}}. dos_date_time_from_datetime({{Year, Month, Day}, {Hour, Min, Sec}}) -> YearFrom1980 = Year-1980, <<DosTime:16>> = <<Hour:5, Min:6, Sec:5>>, <<DosDate:16>> = <<YearFrom1980:7, Month:4, Day:5>>, {DosDate, DosTime}. unix_extra_field_and_var_from_bin(<<TSize:16/little, ATime:32/little, MTime:32/little, UID:16/little, GID:16/little, Var:TSize/binary>>) -> {#unix_extra_field{atime = ATime, mtime = MTime, uid = UID, gid = GID}, Var}; unix_extra_field_and_var_from_bin(_) -> throw(bad_unix_extra_field). %% A pwrite-like function for iolists (used by memory-option) split_iolist(B, Pos) when is_binary(B) -> split_binary(B, Pos); split_iolist(L, Pos) when is_list(L) -> splitter([], L, Pos). splitter(Left, Right, 0) -> {Left, Right}; splitter(Left, [A | Right], RelPos) when is_list(A) or is_binary(A) -> Sz = erlang:iolist_size(A), case Sz > RelPos of true -> {Leftx, Rightx} = split_iolist(A, RelPos), {[Left | Leftx], [Rightx, Right]}; _ -> splitter([Left | A], Right, RelPos - Sz) end; splitter(Left, [A | Right], RelPos) when is_integer(A) -> splitter([Left, A], Right, RelPos - 1); splitter(Left, Right, RelPos) when is_binary(Right) -> splitter(Left, [Right], RelPos). skip_iolist(B, Pos) when is_binary(B) -> case B of <<_:Pos/binary, Bin/binary>> -> Bin; _ -> <<>> end; skip_iolist(L, Pos) when is_list(L) -> skipper(L, Pos). skipper(Right, 0) -> Right; skipper([A | Right], RelPos) when is_list(A) or is_binary(A) -> Sz = erlang:iolist_size(A), case Sz > RelPos of true -> Rightx = skip_iolist(A, RelPos), [Rightx, Right]; _ -> skip_iolist(Right, RelPos - Sz) end; skipper([A | Right], RelPos) when is_integer(A) -> skip_iolist(Right, RelPos - 1). pwrite_iolist(Iolist, Pos, Bin) -> {Left, Right} = split_iolist(Iolist, Pos), Sz = erlang:iolist_size(Bin), R = skip_iolist(Right, Sz), [Left, Bin | R]. pwrite_binary(B, Pos, Bin) -> erlang:iolist_to_binary(pwrite_iolist(B, Pos, Bin)). %% ZIP header manipulations eocd_and_comment_from_bin(<<DiskNum:16/little, StartDiskNum:16/little, EntriesOnDisk:16/little, Entries:16/little, Size:32/little, Offset:32/little, ZipCommentLength:16/little, Comment:ZipCommentLength/binary>>) -> {#eocd{disk_num = DiskNum, start_disk_num = StartDiskNum, entries_on_disk = EntriesOnDisk, entries = Entries, size = Size, offset = Offset, zip_comment_length = ZipCommentLength}, Comment}; eocd_and_comment_from_bin(_) -> throw(bad_eocd). cd_file_header_from_bin(<<VersionMadeBy:16/little, VersionNeeded:16/little, GPFlag:16/little, CompMethod:16/little, LastModTime:16/little, LastModDate:16/little, CRC32:32/little, CompSize:32/little, UncompSize:32/little, FileNameLength:16/little, ExtraFieldLength:16/little, FileCommentLength:16/little, DiskNumStart:16/little, InternalAttr:16/little, ExternalAttr:32/little, LocalHeaderOffset:32/little>>) -> #cd_file_header{version_made_by = VersionMadeBy, version_needed = VersionNeeded, gp_flag = GPFlag, comp_method = CompMethod, last_mod_time = LastModTime, last_mod_date = LastModDate, crc32 = CRC32, comp_size = CompSize, uncomp_size = UncompSize, file_name_length = FileNameLength, extra_field_length = ExtraFieldLength, file_comment_length = FileCommentLength, disk_num_start = DiskNumStart, internal_attr = InternalAttr, external_attr = ExternalAttr, local_header_offset = LocalHeaderOffset}; cd_file_header_from_bin(_) -> throw(bad_cd_file_header). local_file_header_from_bin(<<VersionNeeded:16/little, GPFlag:16/little, CompMethod:16/little, LastModTime:16/little, LastModDate:16/little, CRC32:32/little, CompSize:32/little, UncompSize:32/little, FileNameLength:16/little, ExtraFieldLength:16/little>>) -> #local_file_header{version_needed = VersionNeeded, gp_flag = GPFlag, comp_method = CompMethod, last_mod_time = LastModTime, last_mod_date = LastModDate, crc32 = CRC32, comp_size = CompSize, uncomp_size = UncompSize, file_name_length = FileNameLength, extra_field_length = ExtraFieldLength}; local_file_header_from_bin(_) -> throw(bad_local_file_header). %% make a file_info from a local directory header %% local_file_header_to_file_info( %% #local_file_header{last_mod_time = ModTime, %% last_mod_date = ModDate, %% uncomp_size = UncompSize}) -> %% T = dos_date_time_to_datetime(ModDate, ModTime), %% FI = #file_info{size = UncompSize, %% type = regular, %% access = read_write, %% atime = T, %% mtime = T, %% ctime = T, %% mode = 8#066, %% links = 1, %% major_device = 0, %% minor_device = 0, %% inode = 0, %% uid = 0, %% gid = 0}, %% FI. %% io functions binary_io({file_info, {_Filename, _B, #file_info{} = FI}}, _A) -> FI; binary_io({file_info, {_Filename, #file_info{} = FI, _B}}, _A) -> FI; binary_io({file_info, {_Filename, B}}, A) -> binary_io({file_info, B}, A); binary_io({file_info, B}, _) -> {Type, Size} = if is_binary(B) -> {regular, byte_size(B)}; B =:= directory -> {directory, 0} end, Now = calendar:local_time(), #file_info{size = Size, type = Type, access = read_write, atime = Now, mtime = Now, ctime = Now, mode = 0, links = 1, major_device = 0, minor_device = 0, inode = 0, uid = 0, gid = 0}; binary_io({open, {_Filename, B, _FI}, _Opts}, _) when is_binary(B) -> {0, B}; binary_io({open, {_Filename, _FI, B}, _Opts}, _) when is_binary(B) -> {0, B}; binary_io({open, {_Filename, B}, _Opts}, _) when is_binary(B) -> {0, B}; binary_io({open, B, _Opts}, _) when is_binary(B) -> {0, B}; binary_io({open, Filename, _Opts}, _) when is_list(Filename) -> {0, <<>>}; binary_io({read, N}, {Pos, B}) when Pos >= byte_size(B) -> {eof, {Pos+N, B}}; binary_io({read, N}, {Pos, B}) when Pos + N > byte_size(B) -> <<_:Pos/binary, Read/binary>> = B, {Read, {byte_size(B), B}}; binary_io({pread, Pos, N}, {OldPos, B}) -> case B of <<_:Pos/binary, Read:N/binary, _Rest/binary>> -> {Read, {Pos+N, B}}; _ -> {eof, {OldPos, B}} end; binary_io({read, N}, {Pos, B}) -> <<_:Pos/binary, Read:N/binary, _/binary>> = B, {Read, {Pos+N, B}}; binary_io({seek, bof, Pos}, {_OldPos, B}) -> {Pos, B}; binary_io({seek, cur, Pos}, {OldPos, B}) -> {OldPos + Pos, B}; binary_io({seek, eof, Pos}, {_OldPos, B}) -> {byte_size(B) + Pos, B}; binary_io({pwrite, Pos, Data}, {OldPos, B}) -> {OldPos, pwrite_binary(B, Pos, Data)}; binary_io({write, Data}, {Pos, B}) -> {Pos + erlang:iolist_size(Data), pwrite_binary(B, Pos, Data)}; binary_io(close, {_Pos, B}) -> B; binary_io({close, FN}, {_Pos, B}) -> {FN, B}; binary_io({list_dir, _F}, _B) -> []; binary_io({set_file_info, _F, _FI}, B) -> B; binary_io({ensure_dir, _Dir}, B) -> B. file_io({file_info, F}, _) -> case file:read_file_info(F) of {ok, Info} -> Info; {error, E} -> throw(E) end; file_io({open, FN, Opts}, _) -> case lists:member(write, Opts) of true -> ok = filelib:ensure_dir(FN); _ -> ok end, case file:open(FN, Opts++[binary]) of {ok, H} -> H; {error, E} -> throw(E) end; file_io({read, N}, H) -> case file:read(H, N) of {ok, B} -> {B, H}; eof -> {eof, H}; {error, E} -> throw(E) end; file_io({pread, Pos, N}, H) -> case file:pread(H, Pos, N) of {ok, B} -> {B, H}; eof -> {eof, H}; {error, E} -> throw(E) end; file_io({seek, S, Pos}, H) -> case file:position(H, {S, Pos}) of {ok, _NewPos} -> H; {error, Error} -> throw(Error) end; file_io({write, Data}, H) -> case file:write(H, Data) of ok -> H; {error, Error} -> throw(Error) end; file_io({pwrite, Pos, Data}, H) -> case file:pwrite(H, Pos, Data) of ok -> H; {error, Error} -> throw(Error) end; file_io({close, FN}, H) -> case file:close(H) of ok -> FN; {error, Error} -> throw(Error) end; file_io(close, H) -> file_io({close, ok}, H); file_io({list_dir, F}, _H) -> case file:list_dir(F) of {ok, Files} -> Files; {error, Error} -> throw(Error) end; file_io({set_file_info, F, FI}, H) -> case file:write_file_info(F, FI) of ok -> H; {error, Error} -> throw(Error) end; file_io({ensure_dir, Dir}, H) -> ok = filelib:ensure_dir(Dir), H.