diff options
Diffstat (limited to 'lib/stdlib/src')
27 files changed, 3262 insertions, 628 deletions
diff --git a/lib/stdlib/src/Makefile b/lib/stdlib/src/Makefile index bf836203ec..8b156929d7 100644 --- a/lib/stdlib/src/Makefile +++ b/lib/stdlib/src/Makefile @@ -121,6 +121,7 @@ MODULES= \ timer \ unicode \ unicode_util \ + uri_string \ win32reg \ zip diff --git a/lib/stdlib/src/base64.erl b/lib/stdlib/src/base64.erl index 5885745fb1..c8cf6fdffe 100644 --- a/lib/stdlib/src/base64.erl +++ b/lib/stdlib/src/base64.erl @@ -113,9 +113,9 @@ encode_binary(Bin) -> Data :: ascii_binary(). decode(Bin) when is_binary(Bin) -> - decode_binary(<<>>, Bin); + decode_binary(Bin, <<>>); decode(List) when is_list(List) -> - list_to_binary(decode_l(List)). + decode_list(List, <<>>). -spec mime_decode(Base64) -> Data when Base64 :: ascii_string() | ascii_binary(), @@ -186,31 +186,41 @@ mime_decode_to_string(List) when is_list(List) -> bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad, bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad}). -decode_binary(Result0, <<C:8,T0/bits>>) -> - case element(C, ?DECODE_MAP) of - bad -> - erlang:error({badarg,C}); - ws -> - decode_binary(Result0, T0); - eq -> - case strip_ws(T0) of - <<$=:8,T/binary>> -> - <<>> = strip_ws(T), - Split = byte_size(Result0) - 1, - <<Result:Split/bytes,_:4>> = Result0, - Result; - T -> - <<>> = strip_ws(T), - Split = byte_size(Result0) - 1, - <<Result:Split/bytes,_:2>> = Result0, - Result - end; - Bits -> - decode_binary(<<Result0/bits,Bits:6>>, T0) +decode_binary(<<C1:8, Cs/bits>>, A) -> + case element(C1, ?DECODE_MAP) of + ws -> decode_binary(Cs, A); + B1 -> decode_binary(Cs, A, B1) end; -decode_binary(Result, <<>>) -> - true = is_binary(Result), - Result. +decode_binary(<<>>, A) -> + A. + +decode_binary(<<C2:8, Cs/bits>>, A, B1) -> + case element(C2, ?DECODE_MAP) of + ws -> decode_binary(Cs, A, B1); + B2 -> decode_binary(Cs, A, B1, B2) + end. + +decode_binary(<<C3:8, Cs/bits>>, A, B1, B2) -> + case element(C3, ?DECODE_MAP) of + ws -> decode_binary(Cs, A, B1, B2); + B3 -> decode_binary(Cs, A, B1, B2, B3) + end. + +decode_binary(<<C4:8, Cs/bits>>, A, B1, B2, B3) -> + case element(C4, ?DECODE_MAP) of + ws -> decode_binary(Cs, A, B1, B2, B3); + eq when B3 =:= eq -> only_ws_binary(Cs, <<A/binary,B1:6,(B2 bsr 4):2>>); + eq -> only_ws_binary(Cs, <<A/binary,B1:6,B2:6,(B3 bsr 2):4>>); + B4 -> decode_binary(Cs, <<A/binary,B1:6,B2:6,B3:6,B4:6>>) + end. + +only_ws_binary(<<>>, A) -> + A; +only_ws_binary(<<C:8, Cs/bits>>, A) -> + case element(C, ?DECODE_MAP) of + ws -> only_ws_binary(Cs, A); + _ -> erlang:error(function_clause) + end. %% Skipping pad character if not at end of string. Also liberal about %% excess padding and skipping of other illegal (non-base64 alphabet) @@ -262,6 +272,42 @@ mime_decode_binary_after_eq(Result0, <<>>, Eq) -> Result end. +decode_list([C1 | Cs], A) -> + case element(C1, ?DECODE_MAP) of + ws -> decode_list(Cs, A); + B1 -> decode_list(Cs, A, B1) + end; +decode_list([], A) -> + A. + +decode_list([C2 | Cs], A, B1) -> + case element(C2, ?DECODE_MAP) of + ws -> decode_list(Cs, A, B1); + B2 -> decode_list(Cs, A, B1, B2) + end. + +decode_list([C3 | Cs], A, B1, B2) -> + case element(C3, ?DECODE_MAP) of + ws -> decode_list(Cs, A, B1, B2); + B3 -> decode_list(Cs, A, B1, B2, B3) + end. + +decode_list([C4 | Cs], A, B1, B2, B3) -> + case element(C4, ?DECODE_MAP) of + ws -> decode_list(Cs, A, B1, B2, B3); + eq when B3 =:= eq -> only_ws(Cs, <<A/binary,B1:6,(B2 bsr 4):2>>); + eq -> only_ws(Cs, <<A/binary,B1:6,B2:6,(B3 bsr 2):4>>); + B4 -> decode_list(Cs, <<A/binary,B1:6,B2:6,B3:6,B4:6>>) + end. + +only_ws([], A) -> + A; +only_ws([C | Cs], A) -> + case element(C, ?DECODE_MAP) of + ws -> only_ws(Cs, A); + _ -> erlang:error(function_clause) + end. + decode([], A) -> A; decode([$=,$=,C2,C1|Cs], A) -> Bits2x6 = (b64d(C1) bsl 18) bor (b64d(C2) bsl 12), @@ -292,16 +338,6 @@ strip_spaces([$\r|Cs], A) -> strip_spaces(Cs, A); strip_spaces([$\n|Cs], A) -> strip_spaces(Cs, A); strip_spaces([C|Cs], A) -> strip_spaces(Cs, [C | A]). -strip_ws(<<$\t,T/binary>>) -> - strip_ws(T); -strip_ws(<<$\n,T/binary>>) -> - strip_ws(T); -strip_ws(<<$\r,T/binary>>) -> - strip_ws(T); -strip_ws(<<$\s,T/binary>>) -> - strip_ws(T); -strip_ws(T) -> T. - %% Skipping pad character if not at end of string. Also liberal about %% excess padding and skipping of other illegal (non-base64 alphabet) %% characters. See section 3.3 of RFC4648 diff --git a/lib/stdlib/src/c.erl b/lib/stdlib/src/c.erl index c04a201ce1..9a447af5b7 100644 --- a/lib/stdlib/src/c.erl +++ b/lib/stdlib/src/c.erl @@ -668,19 +668,23 @@ lm() -> [l(M) || M <- mm()]. %% erlangrc(Home) -%% Try to run a ".erlang" file, first in the current directory -%% else in home directory. +%% Try to run a ".erlang" file in home directory. + +-spec erlangrc() -> {ok, file:filename()} | {error, term()}. erlangrc() -> case init:get_argument(home) of {ok,[[Home]]} -> erlangrc([Home]); _ -> - f_p_e(["."], ".erlang") + {error, enoent} end. -erlangrc([Home]) -> - f_p_e([".",Home], ".erlang"). +-spec erlangrc(PathList) -> {ok, file:filename()} | {error, term()} + when PathList :: [Dir :: file:name()]. + +erlangrc([Home|_]=Paths) when is_list(Home) -> + f_p_e(Paths, ".erlang"). error(Fmt, Args) -> error_logger:error_msg(Fmt, Args). @@ -692,11 +696,11 @@ f_p_e(P, F) -> {error, E={Line, _Mod, _Term}} -> error("file:path_eval(~tp,~tp): error on line ~p: ~ts~n", [P, F, Line, file:format_error(E)]), - ok; + {error, E}; {error, E} -> error("file:path_eval(~tp,~tp): ~ts~n", [P, F, file:format_error(E)]), - ok; + {error, E}; Other -> Other end. diff --git a/lib/stdlib/src/epp.erl b/lib/stdlib/src/epp.erl index 31d0d499e3..00e6a10d8a 100644 --- a/lib/stdlib/src/epp.erl +++ b/lib/stdlib/src/epp.erl @@ -479,7 +479,7 @@ com_enc(_B, _Fun, _N, L, Ps) -> com_enc_end([L | Ps]). com_enc_end(Ps0) -> - Ps = lists:reverse([lists:reverse(string:to_lower(P)) || P <- Ps0]), + Ps = lists:reverse([lists:reverse(lowercase(P)) || P <- Ps0]), com_encoding(Ps). com_encoding(["latin","1"|_]) -> @@ -489,6 +489,9 @@ com_encoding(["utf","8"|_]) -> com_encoding(_) -> throw(no). % Don't try any further +lowercase(S) -> + unicode:characters_to_list(string:lowercase(S)). + normalize_typed_record_fields([]) -> {typed, []}; normalize_typed_record_fields(Fields) -> diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl index 9cd4727dc3..f58cb35cea 100644 --- a/lib/stdlib/src/erl_lint.erl +++ b/lib/stdlib/src/erl_lint.erl @@ -3910,10 +3910,9 @@ check_format_string(Fmt) -> extract_sequences(Fmt, []). extract_sequences(Fmt, Need0) -> - case string:chr(Fmt, $~) of - 0 -> {ok,lists:reverse(Need0)}; %That's it - Pos -> - Fmt1 = string:substr(Fmt, Pos+1), %Skip ~ + case string:find(Fmt, [$~]) of + nomatch -> {ok,lists:reverse(Need0)}; %That's it + [$~|Fmt1] -> case extract_sequence(1, Fmt1, Need0) of {ok,Need1,Rest} -> extract_sequences(Rest, Need1); Error -> Error diff --git a/lib/stdlib/src/erl_pp.erl b/lib/stdlib/src/erl_pp.erl index ee5e7a11bf..367dbefb82 100644 --- a/lib/stdlib/src/erl_pp.erl +++ b/lib/stdlib/src/erl_pp.erl @@ -237,13 +237,20 @@ lform({attribute,Line,Name,Arg}, Opts) -> lform({function,Line,Name,Arity,Clauses}, Opts) -> lfunction({function,Line,Name,Arity,Clauses}, Opts); %% These are specials to make it easier for the compiler. -lform({error,E}, _Opts) -> - leaf(format("~p\n", [{error,E}])); -lform({warning,W}, _Opts) -> - leaf(format("~p\n", [{warning,W}])); +lform({error,_}=E, Opts) -> + message(E, Opts); +lform({warning,_}=W, Opts) -> + message(W, Opts); lform({eof,_Line}, _Opts) -> $\n. +message(M, #options{encoding = Encoding}) -> + F = case Encoding of + latin1 -> "~p\n"; + unicode -> "~tp\n" + end, + leaf(format(F, [M])). + lattribute({attribute,_Line,type,Type}, Opts) -> [typeattr(type, Type, Opts),leaf(".\n")]; lattribute({attribute,_Line,opaque,Type}, Opts) -> @@ -598,8 +605,6 @@ lexpr({'fun',_,{clauses,Cs},Extra}, _Prec, Opts) -> lexpr({named_fun,_,Name,Cs,Extra}, _Prec, Opts) -> {force_nl,fun_info(Extra), {list,[{first,['fun', " "],fun_clauses(Cs, Opts, {named, Name})},'end']}}; -lexpr({'query',_,Lc}, _Prec, Opts) -> - {list,[{step,leaf("query"),lexpr(Lc, 0, Opts)},'end']}; lexpr({call,_,{remote,_,{atom,_,M},{atom,_,F}=N}=Name,Args}, Prec, Opts) -> case erl_internal:bif(M, F, length(Args)) of true -> @@ -904,7 +909,7 @@ maybe_paren(_P, _Prec, Expr) -> Expr. leaf(S) -> - {leaf,chars_size(S),S}. + {leaf,string:length(S),S}. %%% Do the formatting. Currently nothing fancy. Could probably have %%% done it in one single pass. @@ -964,7 +969,7 @@ f({seq,Before,After,Sep,LItems}, I0, ST, WT, PP) -> Sizes = BSizeL ++ SizeL, NSepChars = if is_list(Sep), Sep =/= [] -> - erlang:max(0, length(CharsL)-1); + erlang:max(0, length(CharsL)-1); % not string:length true -> 0 end, @@ -1120,7 +1125,7 @@ incr(I, Incr) -> I+Incr. indentation(E, I) when I < 0 -> - chars_size(E); + string:length(E); indentation(E, I0) -> I = io_lib_format:indentation(E, I0), case has_nl(E) of @@ -1157,19 +1162,19 @@ write_a_string(S, I, PP) -> write_a_string([], _N, _Len, _PP) -> []; write_a_string(S, N, Len, PP) -> - SS = string:sub_string(S, 1, N), + SS = string:slice(S, 0, N), Sl = write_string(SS, PP), - case (chars_size(Sl) > Len) and (N > ?MIN_SUBSTRING) of + case (string:length(Sl) > Len) and (N > ?MIN_SUBSTRING) of true -> write_a_string(S, N-1, Len, PP); false -> [flat_leaf(Sl) | - write_a_string(lists:nthtail(length(SS), S), Len, Len, PP)] + write_a_string(string:slice(S, string:length(SS)), Len, Len, PP)] end. flat_leaf(S) -> L = lists:flatten(S), - {leaf,length(L),L}. + {leaf,string:length(L),L}. write_value(V, PP) -> (PP#pp.value_fun)(V). @@ -1190,15 +1195,6 @@ write_char(C, PP) -> a0() -> erl_anno:new(0). -chars_size([C | Es]) when is_integer(C) -> - 1 + chars_size(Es); -chars_size([E | Es]) -> - chars_size(E) + chars_size(Es); -chars_size([]) -> - 0; -chars_size(B) when is_binary(B) -> - byte_size(B). - -define(N_SPACES, 30). spacetab() -> diff --git a/lib/stdlib/src/erl_scan.erl b/lib/stdlib/src/erl_scan.erl index 47223b129c..4774c4bf19 100644 --- a/lib/stdlib/src/erl_scan.erl +++ b/lib/stdlib/src/erl_scan.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2015. All Rights Reserved. +%% Copyright Ericsson AB 1996-2017. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -752,7 +752,7 @@ scan_string(Cs, St, Line, Col, Toks, {Wcs,Str,Line0,Col0}) -> {char_error,Ncs,Error,Nline,Ncol,EndCol} -> scan_error(Error, Nline, Ncol, Nline, EndCol, Ncs); {error,Nline,Ncol,Nwcs,Ncs} -> - Estr = string:substr(Nwcs, 1, 16), % Expanded escape chars. + Estr = string:slice(Nwcs, 0, 16), % Expanded escape chars. scan_error({string,$\",Estr}, Line0, Col0, Nline, Ncol, Ncs); %" {Ncs,Nline,Ncol,Nstr,Nwcs} -> Anno = anno(Line0, Col0, St, Nstr), @@ -767,7 +767,7 @@ scan_qatom(Cs, St, Line, Col, Toks, {Wcs,Str,Line0,Col0}) -> {char_error,Ncs,Error,Nline,Ncol,EndCol} -> scan_error(Error, Nline, Ncol, Nline, EndCol, Ncs); {error,Nline,Ncol,Nwcs,Ncs} -> - Estr = string:substr(Nwcs, 1, 16), % Expanded escape chars. + Estr = string:slice(Nwcs, 0, 16), % Expanded escape chars. scan_error({string,$\',Estr}, Line0, Col0, Nline, Ncol, Ncs); %' {Ncs,Nline,Ncol,Nstr,Nwcs} -> case catch list_to_atom(Nwcs) of diff --git a/lib/stdlib/src/escript.erl b/lib/stdlib/src/escript.erl index 2b9d8ff65b..132f8efbbe 100644 --- a/lib/stdlib/src/escript.erl +++ b/lib/stdlib/src/escript.erl @@ -224,8 +224,8 @@ return_sections(S, Bin) -> normalize_section(Name, undefined) -> {Name, undefined}; normalize_section(shebang, "#!" ++ Chars) -> - Chopped = string:strip(Chars, right, $\n), - Stripped = string:strip(Chopped, both), + Chopped = string:trim(Chars, trailing, "$\n"), + Stripped = string:trim(Chopped, both), if Stripped =:= ?SHEBANG -> {shebang, default}; @@ -233,8 +233,8 @@ normalize_section(shebang, "#!" ++ Chars) -> {shebang, Stripped} end; normalize_section(comment, Chars) -> - Chopped = string:strip(Chars, right, $\n), - Stripped = string:strip(string:strip(Chopped, left, $%), both), + Chopped = string:trim(Chars, trailing, "$\n"), + Stripped = string:trim(string:trim(Chopped, leading, "$%"), both), if Stripped =:= ?COMMENT -> {comment, default}; @@ -242,8 +242,8 @@ normalize_section(comment, Chars) -> {comment, Stripped} end; normalize_section(emu_args, "%%!" ++ Chars) -> - Chopped = string:strip(Chars, right, $\n), - Stripped = string:strip(Chopped, both), + Chopped = string:trim(Chars, trailing, "$\n"), + Stripped = string:trim(Chopped, both), {emu_args, Stripped}; normalize_section(Name, Chars) -> {Name, Chars}. diff --git a/lib/stdlib/src/ets.erl b/lib/stdlib/src/ets.erl index 1db004c91e..b6548626f3 100644 --- a/lib/stdlib/src/ets.erl +++ b/lib/stdlib/src/ets.erl @@ -1719,7 +1719,7 @@ get_line(P, Default) -> line_string(Binary) when is_binary(Binary) -> unicode:characters_to_list(Binary); line_string(Other) -> Other. -nonl(S) -> string:strip(S, right, $\n). +nonl(S) -> string:trim(S, trailing, "$\n"). print_number(Tab, Key, Num) -> Os = ets:lookup(Tab, Key), @@ -1748,7 +1748,7 @@ do_display_item(_Height, Width, I, Opos) -> L = to_string(I), L2 = if length(L) > Width - 8 -> - string:substr(L, 1, Width-13) ++ " ..."; + string:slice(L, 0, Width-13) ++ " ..."; true -> L end, diff --git a/lib/stdlib/src/filelib.erl b/lib/stdlib/src/filelib.erl index d7c313f214..0f90b3fc33 100644 --- a/lib/stdlib/src/filelib.erl +++ b/lib/stdlib/src/filelib.erl @@ -365,11 +365,18 @@ do_list_dir(Dir, Mod) -> eval_list_dir(Dir, Mod). %%% Compiling a wildcard. + +%% Define characters used for escaping a \. +-define(ESCAPE_PREFIX, $@). +-define(ESCAPE_CHARACTER, [?ESCAPE_PREFIX,$e]). +-define(ESCAPED_ESCAPE_PREFIX, [?ESCAPE_PREFIX,?ESCAPE_PREFIX]). + %% Only for debugging. compile_wildcard(Pattern) when is_list(Pattern) -> {compiled_wildcard,?HANDLE_ERROR(compile_wildcard(Pattern, "."))}. -compile_wildcard(Pattern, Cwd0) -> +compile_wildcard(Pattern0, Cwd0) -> + Pattern = convert_escapes(Pattern0), [Root|Rest] = filename:split(Pattern), case filename:pathtype(Root) of relative -> @@ -409,7 +416,8 @@ compile_join({cwd,Cwd}, File0) -> compile_join({root,PrefixLen,Root}, File) -> {root,PrefixLen,filename:join(Root, File)}. -compile_part(Part) -> +compile_part(Part0) -> + Part = wrap_escapes(Part0), compile_part(Part, false, []). compile_part_to_sep(Part) -> @@ -445,6 +453,8 @@ compile_part([${|Rest], Upto, Result) -> error -> compile_part(Rest, Upto, [${|Result]) end; +compile_part([{escaped,X}|Rest], Upto, Result) -> + compile_part(Rest, Upto, [X|Result]); compile_part([X|Rest], Upto, Result) -> compile_part(Rest, Upto, [X|Result]); compile_part([], _Upto, Result) -> @@ -461,6 +471,8 @@ compile_charset1([Lower, $-, Upper|Rest], Ordset) when Lower =< Upper -> compile_charset1(Rest, compile_range(Lower, Upper, Ordset)); compile_charset1([$]|Rest], Ordset) -> {ok, {one_of, gb_sets:from_ordset(Ordset)}, Rest}; +compile_charset1([{escaped,X}|Rest], Ordset) -> + compile_charset1(Rest, ordsets:add_element(X, Ordset)); compile_charset1([X|Rest], Ordset) -> compile_charset1(Rest, ordsets:add_element(X, Ordset)); compile_charset1([], _Ordset) -> @@ -486,6 +498,32 @@ compile_alt(Pattern, Result) -> error end. +%% Convert backslashes to an illegal Unicode character to +%% protect in from filename:split/1. + +convert_escapes([?ESCAPE_PREFIX|T]) -> + ?ESCAPED_ESCAPE_PREFIX ++ convert_escapes(T); +convert_escapes([$\\|T]) -> + ?ESCAPE_CHARACTER ++ convert_escapes(T); +convert_escapes([H|T]) -> + [H|convert_escapes(T)]; +convert_escapes([]) -> + []. + +%% Wrap each escape in a tuple to remove the special meaning for +%% the character that follows. + +wrap_escapes(?ESCAPED_ESCAPE_PREFIX ++ T) -> + [?ESCAPE_PREFIX|wrap_escapes(T)]; +wrap_escapes(?ESCAPE_CHARACTER ++ [C|T]) -> + [{escaped,C}|wrap_escapes(T)]; +wrap_escapes(?ESCAPE_CHARACTER) -> + []; +wrap_escapes([H|T]) -> + [H|wrap_escapes(T)]; +wrap_escapes([]) -> + []. + badpattern(Reason) -> error({badpattern,Reason}). diff --git a/lib/stdlib/src/filename.erl b/lib/stdlib/src/filename.erl index ee807dfd09..a322bd002d 100644 --- a/lib/stdlib/src/filename.erl +++ b/lib/stdlib/src/filename.erl @@ -34,6 +34,38 @@ %% we flatten the arguments immediately on function entry as that makes %% it easier to ensure that the code works. +%% +%% *** Requirements on Raw Filename Format *** +%% +%% These requirements are due to the 'filename' module +%% in stdlib. This since it is documented that it +%% should be able to operate on raw filenames as well +%% as ordinary filenames. +%% +%% A raw filename *must* be a byte sequence where: +%% 1. Codepoints 0-127 (7-bit ascii) *must* be encoded +%% as a byte with the corresponding value. That is, +%% the most significant bit in the byte encoding the +%% codepoint is never set. +%% 2. Codepoints greater than 127 *must* be encoded +%% with the most significant bit set in *every* byte +%% encoding it. +%% +%% Latin1 and UTF-8 meet these requirements while +%% UTF-16 and UTF-32 don't. +%% +%% On Windows filenames are natively stored as malformed +%% UTF-16LE (lonely surrogates may appear). A more correct +%% description than UTF-16 would be an array of 16-bit +%% words... In order to meet the requirements of the +%% raw file format we convert the malformed UTF-16LE to +%% malformed UTF-8 which meet the requirements. +%% +%% Note that these requirements are today only OTP +%% internal (erts-stdlib internal) requirements that +%% could be changed. +%% + -export([absname/1, absname/2, absname_join/2, basename/1, basename/2, dirname/1, extension/1, join/1, join/2, pathtype/1, @@ -41,6 +73,7 @@ safe_relative_path/1]). -export([find_src/1, find_src/2]). % deprecated -export([basedir/2, basedir/3]). +-export([validate/1]). %% Undocumented and unsupported exports. -export([append/2]). @@ -1053,10 +1086,10 @@ basedir_linux(Type) -> user_log -> getenv("XDG_CACHE_HOME", ?basedir_linux_user_log, true); site_data -> Base = getenv("XDG_DATA_DIRS",?basedir_linux_site_data,false), - string:tokens(Base,":"); + string:lexemes(Base, ":"); site_config -> Base = getenv("XDG_CONFIG_DIRS",?basedir_linux_site_config,false), - string:tokens(Base,":") + string:lexemes(Base, ":") end. -define(basedir_darwin_user_data, "Library/Application Support"). @@ -1152,3 +1185,72 @@ basedir_os_type() -> {win32,_} -> windows; _ -> linux end. + +%% +%% validate/1 +%% + +-spec validate(FileName) -> boolean() when + FileName :: file:name_all(). + +validate(FileName) when is_binary(FileName) -> + %% Raw filename... + validate_bin(FileName); +validate(FileName) when is_list(FileName); + is_atom(FileName) -> + validate_list(FileName, + file:native_name_encoding(), + os:type()). + +validate_list(FileName, Enc, Os) -> + try + true = validate_list(FileName, Enc, Os, 0) > 0 + catch + _ : _ -> false + end. + +validate_list([], _Enc, _Os, Chars) -> + Chars; +validate_list(C, Enc, Os, Chars) when is_integer(C) -> + validate_char(C, Enc, Os), + Chars+1; +validate_list(A, Enc, Os, Chars) when is_atom(A) -> + validate_list(atom_to_list(A), Enc, Os, Chars); +validate_list([H|T], Enc, Os, Chars) -> + NewChars = validate_list(H, Enc, Os, Chars), + validate_list(T, Enc, Os, NewChars). + +%% C is always an integer... +% validate_char(C, _, _) when not is_integer(C) -> +% throw(invalid); +validate_char(C, _, _) when C < 1 -> + throw(invalid); %% No negative or null characters... +validate_char(C, latin1, _) when C > 255 -> + throw(invalid); +validate_char(C, utf8, _) when C >= 16#110000 -> + throw(invalid); +validate_char(C, utf8, {win32, _}) when C > 16#ffff -> + throw(invalid); %% invalid win wchar... +validate_char(_C, utf8, {win32, _}) -> + ok; %% Range below is accepted on windows... +validate_char(C, utf8, _) when 16#D800 =< C, C =< 16#DFFF -> + throw(invalid); %% invalid unicode range... +validate_char(_, _, _) -> + ok. + +validate_bin(Bin) -> + %% Raw filename. That is, we do not interpret + %% the encoding, but we still do not accept + %% null characters... + try + true = validate_bin(Bin, 0) > 0 + catch + _ : _ -> false + end. + +validate_bin(<<>>, Bs) -> + Bs; +validate_bin(<<0, _Rest/binary>>, _Bs) -> + throw(invalid); %% No null characters allowed... +validate_bin(<<_B, Rest/binary>>, Bs) -> + validate_bin(Rest, Bs+1). diff --git a/lib/stdlib/src/gen_server.erl b/lib/stdlib/src/gen_server.erl index 7daa7a9fe4..ac172325b5 100644 --- a/lib/stdlib/src/gen_server.erl +++ b/lib/stdlib/src/gen_server.erl @@ -116,23 +116,27 @@ %%%========================================================================= -callback init(Args :: term()) -> - {ok, State :: term()} | {ok, State :: term(), timeout() | hibernate} | + {ok, State :: term()} | {ok, State :: term(), timeout() | hibernate | {continue, term()}} | {stop, Reason :: term()} | ignore. -callback handle_call(Request :: term(), From :: {pid(), Tag :: term()}, State :: term()) -> {reply, Reply :: term(), NewState :: term()} | - {reply, Reply :: term(), NewState :: term(), timeout() | hibernate} | + {reply, Reply :: term(), NewState :: term(), timeout() | hibernate | {continue, term()}} | {noreply, NewState :: term()} | - {noreply, NewState :: term(), timeout() | hibernate} | + {noreply, NewState :: term(), timeout() | hibernate | {continue, term()}} | {stop, Reason :: term(), Reply :: term(), NewState :: term()} | {stop, Reason :: term(), NewState :: term()}. -callback handle_cast(Request :: term(), State :: term()) -> {noreply, NewState :: term()} | - {noreply, NewState :: term(), timeout() | hibernate} | + {noreply, NewState :: term(), timeout() | hibernate | {continue, term()}} | {stop, Reason :: term(), NewState :: term()}. -callback handle_info(Info :: timeout | term(), State :: term()) -> {noreply, NewState :: term()} | - {noreply, NewState :: term(), timeout() | hibernate} | + {noreply, NewState :: term(), timeout() | hibernate | {continue, term()}} | + {stop, Reason :: term(), NewState :: term()}. +-callback handle_continue(Info :: term(), State :: term()) -> + {noreply, NewState :: term()} | + {noreply, NewState :: term(), timeout() | hibernate | {continue, term()}} | {stop, Reason :: term(), NewState :: term()}. -callback terminate(Reason :: (normal | shutdown | {shutdown, term()} | term()), @@ -149,7 +153,7 @@ Status :: term(). -optional_callbacks( - [handle_info/2, terminate/2, code_change/3, format_status/2]). + [handle_info/2, handle_continue/2, terminate/2, code_change/3, format_status/2]). %%% ----------------------------------------------------------------- %%% Starts a generic server. @@ -309,7 +313,7 @@ enter_loop(Mod, Options, State, ServerName, Timeout) -> Name = gen:get_proc_name(ServerName), Parent = gen:get_parent(), Debug = gen:debug_options(Name, Options), - HibernateAfterTimeout = gen:hibernate_after(Options), + HibernateAfterTimeout = gen:hibernate_after(Options), loop(Parent, Name, State, Mod, Timeout, HibernateAfterTimeout, Debug). %%%======================================================================== @@ -374,6 +378,19 @@ init_it(Mod, Args) -> %%% --------------------------------------------------- %%% The MAIN loop. %%% --------------------------------------------------- + +loop(Parent, Name, State, Mod, {continue, Continue} = Msg, HibernateAfterTimeout, Debug) -> + Reply = try_dispatch(Mod, handle_continue, Continue, State), + case Debug of + [] -> + handle_common_reply(Reply, Parent, Name, undefined, Msg, Mod, + HibernateAfterTimeout, State); + _ -> + Debug1 = sys:handle_debug(Debug, fun print_event/3, Name, Msg), + handle_common_reply(Reply, Parent, Name, undefined, Msg, Mod, + HibernateAfterTimeout, State, Debug1) + end; + loop(Parent, Name, State, Mod, hibernate, HibernateAfterTimeout, Debug) -> proc_lib:hibernate(?MODULE,wake_hib,[Parent, Name, State, Mod, HibernateAfterTimeout, Debug]); diff --git a/lib/stdlib/src/gen_statem.erl b/lib/stdlib/src/gen_statem.erl index 1110d18af6..cd6312855d 100644 --- a/lib/stdlib/src/gen_statem.erl +++ b/lib/stdlib/src/gen_statem.erl @@ -296,7 +296,7 @@ (Reason :: term()). %% Format the callback module state in some sensible that is -%% often condensed way. For StatusOption =:= 'normal' the perferred +%% often condensed way. For StatusOption =:= 'normal' the preferred %% return term is [{data,[{"State",FormattedState}]}], and for %% StatusOption =:= 'terminate' it is just FormattedState. -callback format_status( @@ -510,8 +510,6 @@ call(ServerRef, Request, Timeout) -> parse_timeout(Timeout) -> case Timeout of - {clean_timeout,infinity} -> - {dirty_timeout,infinity}; {clean_timeout,_} -> Timeout; {dirty_timeout,_} -> diff --git a/lib/stdlib/src/io_lib.erl b/lib/stdlib/src/io_lib.erl index 9d447418f8..3c8430b820 100644 --- a/lib/stdlib/src/io_lib.erl +++ b/lib/stdlib/src/io_lib.erl @@ -963,7 +963,18 @@ limit_tail(Other, D) -> %% maps:from_list() creates a map with the same internal ordering of %% the selected associations as in Map. limit_map(Map, D) -> - maps:from_list(erts_internal:maps_to_list(Map, D)). + limit_map(maps:iterator(Map), D, []). + +limit_map(_I, 0, Acc) -> + maps:from_list(Acc); +limit_map(I, D, Acc) -> + case maps:next(I) of + {K, V, NextI} -> + limit_map(NextI, D-1, [{K,V} | Acc]); + none -> + maps:from_list(Acc) + end. + %% maps:from_list(limit_map_body(erts_internal:maps_to_list(Map, D), D)). %% limit_map_body(_, 0) -> [{'...', '...'}]; diff --git a/lib/stdlib/src/io_lib_format.erl b/lib/stdlib/src/io_lib_format.erl index 4b2d15c8b3..e345810ca0 100644 --- a/lib/stdlib/src/io_lib_format.erl +++ b/lib/stdlib/src/io_lib_format.erl @@ -380,7 +380,7 @@ float_e(_Fl, {Ds,E}, P) -> {Fs,false} -> [Fs|float_exp(E-1)] end. -%% float_man([Digit], Icount, Dcount) -> {[Chars],CarryFlag}. +%% float_man([Digit], Icount, Dcount) -> {[Char],CarryFlag}. %% Generate the characters in the mantissa from the digits with Icount %% characters before the '.' and Dcount decimals. Handle carry and let %% caller decide what to do at top. @@ -395,7 +395,7 @@ float_man([D|Ds], I, Dc) -> {Cs,false} -> {[D|Cs],false} end; float_man([], I, Dc) -> %Pad with 0's - {string:chars($0, I, [$.|string:chars($0, Dc)]),false}. + {lists:duplicate(I, $0) ++ [$.|lists:duplicate(Dc, $0)],false}. float_man([D|_], 0) when D >= $5 -> {[],true}; float_man([_|_], 0) -> {[],false}; @@ -405,7 +405,7 @@ float_man([D|Ds], Dc) -> {Cs,true} -> {[D+1|Cs],false}; {Cs,false} -> {[D|Cs],false} end; -float_man([], Dc) -> {string:chars($0, Dc),false}. %Pad with 0's +float_man([], Dc) -> {lists:duplicate(Dc, $0),false}. %Pad with 0's %% float_exp(Exponent) -> [Char]. %% Generate the exponent of a floating point number. Always include sign. @@ -429,7 +429,7 @@ fwrite_f(Fl, F, Adj, P, Pad) when P >= 1 -> float_f(Fl, Fd, P) when Fl < 0.0 -> [$-|float_f(-Fl, Fd, P)]; float_f(Fl, {Ds,E}, P) when E =< 0 -> - float_f(Fl, {string:chars($0, -E+1, Ds),1}, P); %Prepend enough 0's + float_f(Fl, {lists:duplicate(-E+1, $0)++Ds,1}, P); %Prepend enough 0's float_f(_Fl, {Ds,E}, P) -> case float_man(Ds, E, P) of {Fs,true} -> "1" ++ Fs; %Handle carry @@ -751,7 +751,7 @@ adjust(Data, Pad, right) -> [Pad|Data]. flat_trunc(List, N) when is_integer(N), N >= 0 -> string:slice(List, 0, N). -%% A deep version of string:chars/2,3 +%% A deep version of lists:duplicate/2 chars(_C, 0) -> []; diff --git a/lib/stdlib/src/io_lib_pretty.erl b/lib/stdlib/src/io_lib_pretty.erl index 505613b80e..89e1931d2d 100644 --- a/lib/stdlib/src/io_lib_pretty.erl +++ b/lib/stdlib/src/io_lib_pretty.erl @@ -478,9 +478,19 @@ print_length(Term, _D, _RF, _Enc, _Str) -> print_length_map(_Map, 1, _RF, _Enc, _Str) -> {"#{...}", 6}; print_length_map(Map, D, RF, Enc, Str) when is_map(Map) -> - Pairs = print_length_map_pairs(erts_internal:maps_to_list(Map, D), D, RF, Enc, Str), + Pairs = print_length_map_pairs(limit_map(maps:iterator(Map), D, []), D, RF, Enc, Str), {{map, Pairs}, list_length(Pairs, 3)}. +limit_map(_I, 0, Acc) -> + Acc; +limit_map(I, D, Acc) -> + case maps:next(I) of + {K, V, NextI} -> + limit_map(NextI, D-1, [{K,V} | Acc]); + none -> + Acc + end. + print_length_map_pairs([], _D, _RF, _Enc, _Str) -> []; print_length_map_pairs(_Pairs, 1, _RF, _Enc, _Str) -> diff --git a/lib/stdlib/src/lib.erl b/lib/stdlib/src/lib.erl index c6eb0d7915..a7980cc294 100644 --- a/lib/stdlib/src/lib.erl +++ b/lib/stdlib/src/lib.erl @@ -646,7 +646,7 @@ pp_arguments(PF, As, I, Enc) -> Ll = length(L), A = list_to_atom(lists:duplicate(Ll, $a)), S0 = unicode:characters_to_list(PF([A | T], I+1), Enc), - brackets_to_parens([$[,L,string:sub_string(S0, 2+Ll)], Enc); + brackets_to_parens([$[,L,string:slice(S0, 1+Ll)], Enc); _ -> brackets_to_parens(PF(As, I+1), Enc) end. diff --git a/lib/stdlib/src/maps.erl b/lib/stdlib/src/maps.erl index 5dafdb282a..a13f340709 100644 --- a/lib/stdlib/src/maps.erl +++ b/lib/stdlib/src/maps.erl @@ -23,7 +23,8 @@ -export([get/3, filter/2,fold/3, map/2, size/1, update_with/3, update_with/4, - without/2, with/2]). + without/2, with/2, + iterator/1, next/1]). %% BIFs -export([get/2, find/2, from_list/1, @@ -31,6 +32,15 @@ new/0, put/3, remove/2, take/2, to_list/1, update/3, values/1]). +-opaque iterator() :: {term(), term(), iterator()} + | none | nonempty_improper_list(integer(),map()). + +-export_type([iterator/0]). + +-dialyzer({no_improper_lists, iterator/1}). + +-define(IS_ITERATOR(I), is_tuple(I) andalso tuple_size(I) == 3; I == none; is_integer(hd(I)) andalso is_map(tl(I))). + %% Shadowed by erl_bif_types: maps:get/2 -spec get(Key,Map) -> Value when Key :: term(), @@ -39,7 +49,6 @@ get(_,_) -> erlang:nif_error(undef). - -spec find(Key,Map) -> {ok, Value} | error when Key :: term(), Map :: map(), @@ -114,14 +123,20 @@ remove(_,_) -> erlang:nif_error(undef). take(_,_) -> erlang:nif_error(undef). -%% Shadowed by erl_bif_types: maps:to_list/1 -spec to_list(Map) -> [{Key,Value}] when Map :: map(), Key :: term(), Value :: term(). -to_list(_) -> erlang:nif_error(undef). +to_list(Map) when is_map(Map) -> + to_list_internal(erts_internal:map_next(0, Map, [])); +to_list(Map) -> + erlang:error({badmap,Map},[Map]). +to_list_internal([Iter, Map | Acc]) when is_integer(Iter) -> + to_list_internal(erts_internal:map_next(Iter, Map, Acc)); +to_list_internal(Acc) -> + Acc. %% Shadowed by erl_bif_types: maps:update/3 -spec update(Key,Value,Map1) -> Map2 when @@ -192,47 +207,80 @@ get(Key,Map,Default) -> erlang:error({badmap,Map},[Key,Map,Default]). --spec filter(Pred,Map1) -> Map2 when +-spec filter(Pred,MapOrIter) -> Map when Pred :: fun((Key, Value) -> boolean()), Key :: term(), Value :: term(), - Map1 :: map(), - Map2 :: map(). + MapOrIter :: map() | iterator(), + Map :: map(). filter(Pred,Map) when is_function(Pred,2), is_map(Map) -> - maps:from_list([{K,V}||{K,V}<-maps:to_list(Map),Pred(K,V)]); + maps:from_list(filter_1(Pred, iterator(Map))); +filter(Pred,Iterator) when is_function(Pred,2), ?IS_ITERATOR(Iterator) -> + maps:from_list(filter_1(Pred, Iterator)); filter(Pred,Map) -> erlang:error(error_type(Map),[Pred,Map]). - --spec fold(Fun,Init,Map) -> Acc when +filter_1(Pred, Iter) -> + case next(Iter) of + {K, V, NextIter} -> + case Pred(K,V) of + true -> + [{K,V} | filter_1(Pred, NextIter)]; + false -> + filter_1(Pred, NextIter) + end; + none -> + [] + end. + +-spec fold(Fun,Init,MapOrIter) -> Acc when Fun :: fun((K, V, AccIn) -> AccOut), Init :: term(), Acc :: term(), AccIn :: term(), AccOut :: term(), - Map :: map(), + MapOrIter :: map() | iterator(), K :: term(), V :: term(). fold(Fun,Init,Map) when is_function(Fun,3), is_map(Map) -> - lists:foldl(fun({K,V},A) -> Fun(K,V,A) end,Init,maps:to_list(Map)); + fold_1(Fun,Init,iterator(Map)); +fold(Fun,Init,Iterator) when is_function(Fun,3), ?IS_ITERATOR(Iterator) -> + fold_1(Fun,Init,Iterator); fold(Fun,Init,Map) -> erlang:error(error_type(Map),[Fun,Init,Map]). --spec map(Fun,Map1) -> Map2 when +fold_1(Fun, Acc, Iter) -> + case next(Iter) of + {K, V, NextIter} -> + fold_1(Fun, Fun(K,V,Acc), NextIter); + none -> + Acc + end. + +-spec map(Fun,MapOrIter) -> Map when Fun :: fun((K, V1) -> V2), - Map1 :: map(), - Map2 :: map(), + MapOrIter :: map() | iterator(), + Map :: map(), K :: term(), V1 :: term(), V2 :: term(). map(Fun,Map) when is_function(Fun, 2), is_map(Map) -> - maps:from_list([{K,Fun(K,V)}||{K,V}<-maps:to_list(Map)]); + maps:from_list(map_1(Fun, iterator(Map))); +map(Fun,Iterator) when is_function(Fun, 2), ?IS_ITERATOR(Iterator) -> + maps:from_list(map_1(Fun, Iterator)); map(Fun,Map) -> erlang:error(error_type(Map),[Fun,Map]). +map_1(Fun, Iter) -> + case next(Iter) of + {K, V, NextIter} -> + [{K, Fun(K, V)} | map_1(Fun, NextIter)]; + none -> + [] + end. -spec size(Map) -> non_neg_integer() when Map :: map(). @@ -242,6 +290,26 @@ size(Map) when is_map(Map) -> size(Val) -> erlang:error({badmap,Val},[Val]). +-spec iterator(Map) -> Iterator when + Map :: map(), + Iterator :: iterator(). + +iterator(M) when is_map(M) -> [0 | M]; +iterator(M) -> erlang:error({badmap, M}, [M]). + +-spec next(Iterator) -> {Key, Value, NextIterator} | 'none' when + Iterator :: iterator(), + Key :: term(), + Value :: term(), + NextIterator :: iterator(). +next({K, V, I}) -> + {K, V, I}; +next([Path | Map]) when is_integer(Path), is_map(Map) -> + erts_internal:map_next(Path, Map, iterator); +next(none) -> + none; +next(Iter) -> + erlang:error(badarg, [Iter]). -spec without(Ks,Map1) -> Map2 when Ks :: [K], @@ -250,11 +318,10 @@ size(Val) -> K :: term(). without(Ks,M) when is_list(Ks), is_map(M) -> - lists:foldl(fun(K, M1) -> ?MODULE:remove(K, M1) end, M, Ks); + lists:foldl(fun(K, M1) -> maps:remove(K, M1) end, M, Ks); without(Ks,M) -> erlang:error(error_type(M),[Ks,M]). - -spec with(Ks, Map1) -> Map2 when Ks :: [K], Map1 :: map(), @@ -263,17 +330,17 @@ without(Ks,M) -> with(Ks,Map1) when is_list(Ks), is_map(Map1) -> Fun = fun(K, List) -> - case ?MODULE:find(K, Map1) of - {ok, V} -> - [{K, V} | List]; - error -> - List - end - end, - ?MODULE:from_list(lists:foldl(Fun, [], Ks)); + case maps:find(K, Map1) of + {ok, V} -> + [{K, V} | List]; + error -> + List + end + end, + maps:from_list(lists:foldl(Fun, [], Ks)); with(Ks,M) -> erlang:error(error_type(M),[Ks,M]). -error_type(M) when is_map(M) -> badarg; +error_type(M) when is_map(M); ?IS_ITERATOR(M) -> badarg; error_type(V) -> {badmap, V}. diff --git a/lib/stdlib/src/otp_internal.erl b/lib/stdlib/src/otp_internal.erl index 5b488cc677..122b476ddb 100644 --- a/lib/stdlib/src/otp_internal.erl +++ b/lib/stdlib/src/otp_internal.erl @@ -609,6 +609,52 @@ obsolete_1(filename, find_src, 2) -> obsolete_1(erlang, hash, 2) -> {removed, {erlang, phash2, 2}, "20.0"}; +%% Added in OTP-21 +obsolete_1(string, len, 1) -> + {deprecated, "deprecated; use string:length/3 instead"}; +obsolete_1(string, concat, 2) -> + {deprecated, "deprecated; use [Str1,Str2] instead"}; +obsolete_1(string, str, 2) -> + {deprecated, "deprecated; use string:find/2 instead"}; +obsolete_1(string, rstr, 2) -> + {deprecated, "deprecated; use string:find/3 instead"}; +obsolete_1(string, chr, 2) -> + {deprecated, "deprecated; use string:find/2 instead"}; +obsolete_1(string, rchr, 2) -> + {deprecated, "deprecated; use string:find/3 instead"}; +obsolete_1(string, span, 2) -> + {deprecated, "deprecated; use string:take/2 instead"}; +obsolete_1(string, cspan, 2) -> + {deprecated, "deprecated; use string:take/3 instead"}; +obsolete_1(string, substr, _) -> + {deprecated, "deprecated; use string:slice/3 instead"}; +obsolete_1(string, tokens, 2) -> + {deprecated, "deprecated; use string:lexemes/2 instead"}; +obsolete_1(string, chars, _) -> + {deprecated, "deprecated; use lists:duplicate/2 instead"}; +obsolete_1(string, copies, _) -> + {deprecated, "deprecated; use lists:duplicate/2 instead"}; +obsolete_1(string, words, _) -> + {deprecated, "deprecated; use string:lexemes/2 instead"}; +obsolete_1(string, strip, _) -> + {deprecated, "deprecated; use string:trim/3 instead"}; +obsolete_1(string, sub_word, _) -> + {deprecated, "deprecated; use string:nth_lexeme/3 instead"}; +obsolete_1(string, sub_string, _) -> + {deprecated, "deprecated; use string:slice/3 instead"}; +obsolete_1(string, left, _) -> + {deprecated, "deprecated; use string:pad/3 instead"}; +obsolete_1(string, right, _) -> + {deprecated, "deprecated; use string:pad/3 instead"}; +obsolete_1(string, centre, _) -> + {deprecated, "deprecated; use string:pad/3 instead"}; +obsolete_1(string, join, _) -> + {deprecated, "deprecated; use lists:join/2 instead"}; +obsolete_1(string, to_upper, _) -> + {deprecated, "deprecated; use string:uppercase/1 or string:titlecase/1 instead"}; +obsolete_1(string, to_lower, _) -> + {deprecated, "deprecated; use string:lowercase/1 or string:casefold/1 instead"}; + %% not obsolete obsolete_1(_, _, _) -> diff --git a/lib/stdlib/src/pool.erl b/lib/stdlib/src/pool.erl index 05950a1d7c..b12ff205b1 100644 --- a/lib/stdlib/src/pool.erl +++ b/lib/stdlib/src/pool.erl @@ -25,7 +25,7 @@ %% with the least load !!!! %% This function is callable from any node including the master %% That is part of the pool -%% nodes are scheduled on a per usgae basis and per load basis, +%% nodes are scheduled on a per usage basis and per load basis, %% Whenever we use a node, we put at the end of the queue, and whenever %% a node report a change in load, we insert it accordingly @@ -197,7 +197,7 @@ pure_insert({Load,Node},[{L,N}|Tail]) when Load < L -> pure_insert(L,[H|T]) -> [H|pure_insert(L,T)]. %% Really should not measure the contributions from -%% the back ground processes here .... which we do :-( +%% the background processes here .... which we do :-( %% We don't have to monitor the master, since we're slaves anyway statistic_collector() -> @@ -213,7 +213,7 @@ statistic_collector(I) -> stat_loop(M, 999999) end. -%% Do not tell the master about our load if it has not changed +%% Do not tell the master about our load if it has not changed stat_loop(M, Old) -> sleep(2000), diff --git a/lib/stdlib/src/rand.erl b/lib/stdlib/src/rand.erl index 7a8a5e6d4a..362e98006e 100644 --- a/lib/stdlib/src/rand.erl +++ b/lib/stdlib/src/rand.erl @@ -21,8 +21,8 @@ %% Multiple PRNG module for Erlang/OTP %% Copyright (c) 2015-2016 Kenji Rikitake %% -%% exrop (xoroshiro116+) added and statistical distribution -%% improvements by the Erlang/OTP team 2017 +%% exrop (xoroshiro116+) added, statistical distribution +%% improvements and uniform_real added by the Erlang/OTP team 2017 %% ===================================================================== -module(rand). @@ -30,10 +30,14 @@ -export([seed_s/1, seed_s/2, seed/1, seed/2, export_seed/0, export_seed_s/1, uniform/0, uniform/1, uniform_s/1, uniform_s/2, + uniform_real/0, uniform_real_s/1, jump/0, jump/1, normal/0, normal/2, normal_s/1, normal_s/3 ]). +%% Debug +-export([make_float/3, float2str/1, bc64/1]). + -compile({inline, [exs64_next/1, exsplus_next/1, exs1024_next/1, exs1024_calc/2, exrop_next/1, exrop_next_s/2, @@ -60,6 +64,10 @@ %% N i evaluated 3 times (?BSL((Bits), (X), (N)) bor ((X) bsr ((Bits)-(N))))). +-define( + BC(V, N), + bc((V), ?BIT((N) - 1), N)). + %%-define(TWO_POW_MINUS53, (math:pow(2, -53))). -define(TWO_POW_MINUS53, 1.11022302462515657e-16). @@ -84,14 +92,21 @@ %% The 'bits' field indicates how many bits the integer %% returned from 'next' has got, i.e 'next' shall return %% an random integer in the range 0..(2^Bits - 1). -%% At least 53 bits is required for the floating point -%% producing fallbacks. This field is only used when -%% the 'uniform' or 'uniform_n' fields are not defined. +%% At least 55 bits is required for the floating point +%% producing fallbacks, but 56 bits would be more future proof. %% %% The fields 'next', 'uniform' and 'uniform_n' -%% implement the algorithm. If 'uniform' or 'uinform_n' +%% implement the algorithm. If 'uniform' or 'uniform_n' %% is not present there is a fallback using 'next' and either -%% 'bits' or the deprecated 'max'. +%% 'bits' or the deprecated 'max'. The 'next' function +%% must generate a word with at least 56 good random bits. +%% +%% The 'weak_low_bits' field indicate how many bits are of +%% lesser quality and they will not be used by the floating point +%% producing functions, nor by the range producing functions +%% when more bits are needed, to avoid weak bits in the middle +%% of the generated bits. The lowest bits from the range +%% functions still have the generator's quality. %% -type alg_handler() :: #{type := alg(), @@ -148,11 +163,7 @@ %% For ranges larger than the algorithm bit size uniform_range(Range, #{next:=Next, bits:=Bits} = Alg, R, V) -> - WeakLowBits = - case Alg of - #{weak_low_bits:=WLB} -> WLB; - #{} -> 0 - end, + WeakLowBits = maps:get(weak_low_bits, Alg, 0), %% Maybe waste the lowest bit(s) when shifting in new bits Shift = Bits - WeakLowBits, ShiftMask = bnot ?MASK(WeakLowBits), @@ -297,7 +308,7 @@ uniform_s({#{bits:=Bits, next:=Next} = Alg, R0}) -> {(V bsr (Bits - 53)) * ?TWO_POW_MINUS53, {Alg, R1}}; uniform_s({#{max:=Max, next:=Next} = Alg, R0}) -> {V, R1} = Next(R0), - %% Old broken algorithm with non-uniform density + %% Old algorithm with non-uniform density {V / (Max + 1), {Alg, R1}}. @@ -317,7 +328,7 @@ uniform_s(N, {#{bits:=Bits, next:=Next} = Alg, R0}) ?uniform_range(N, Alg, R1, V, MaxMinusN, I); uniform_s(N, {#{max:=Max, next:=Next} = Alg, R0}) when is_integer(N), 1 =< N -> - %% Old broken algorithm with skewed probability + %% Old algorithm with skewed probability %% and gap in ranges > Max {V, R1} = Next(R0), if @@ -328,6 +339,189 @@ uniform_s(N, {#{max:=Max, next:=Next} = Alg, R0}) {trunc(F * N) + 1, {Alg, R1}} end. +%% uniform_real/0: returns a random float X where 0.0 < X =< 1.0, +%% updating the state in the process dictionary. + +-spec uniform_real() -> X :: float(). +uniform_real() -> + {X, Seed} = uniform_real_s(seed_get()), + _ = seed_put(Seed), + X. + +%% uniform_real_s/1: given a state, uniform_s/1 +%% returns a random float X where 0.0 < X =< 1.0, +%% and a new state. +%% +%% This function does not use the same form of uniformity +%% as the uniform_s/1 function. +%% +%% Instead, this function does not generate numbers with equal +%% distance in the interval, but rather tries to keep all mantissa +%% bits random also for small numbers, meaning that the distance +%% between possible numbers decreases when the numbers +%% approaches 0.0, as does the possibility for a particular +%% number. Hence uniformity is preserved. +%% +%% To generate 56 bits at the time instead of 53 is actually +%% a speed optimization since the probability to have to +%% generate a second word decreases by 1/2 for every extra bit. +%% +%% This function generates normalized numbers, so the smallest number +%% that can be generated is 2^-1022 with the distance 2^-1074 +%% to the next to smallest number, compared to 2^-53 for uniform_s/1. +%% +%% This concept of uniformity should work better for applications +%% where you need to calculate 1.0/X or math:log(X) since those +%% operations benefits from larger precision approaching 0.0, +%% and that this function does not return 0.0 nor denormalized +%% numbers very close to 0.0. The log() operation in The Box-Muller +%% transformation for normal distribution is an example of this. +%% +%%-define(TWO_POW_MINUS55, (math:pow(2, -55))). +%%-define(TWO_POW_MINUS110, (math:pow(2, -110))). +%%-define(TWO_POW_MINUS55, 2.7755575615628914e-17). +%%-define(TWO_POW_MINUS110, 7.7037197775489436e-34). +%% +-spec uniform_real_s(State :: state()) -> {X :: float(), NewState :: state()}. +uniform_real_s({#{bits:=Bits, next:=Next} = Alg, R0}) -> + %% Generate a 56 bit number without using the weak low bits. + %% + %% Be sure to use only 53 bits when multiplying with + %% math:pow(2.0, -N) to avoid rounding which would make + %% "even" floats more probable than "odd". + %% + {V1, R1} = Next(R0), + M1 = V1 bsr (Bits - 56), + if + ?BIT(55) =< M1 -> + %% We have 56 bits - waste 3 + {(M1 bsr 3) * math:pow(2.0, -53), {Alg, R1}}; + ?BIT(54) =< M1 -> + %% We have 55 bits - waste 2 + {(M1 bsr 2) * math:pow(2.0, -54), {Alg, R1}}; + ?BIT(53) =< M1 -> + %% We have 54 bits - waste 1 + {(M1 bsr 1) * math:pow(2.0, -55), {Alg, R1}}; + ?BIT(52) =< M1 -> + %% We have 53 bits - use all + {M1 * math:pow(2.0, -56), {Alg, R1}}; + true -> + %% Need more bits + {V2, R2} = Next(R1), + uniform_real_s(Alg, Next, M1, -56, R2, V2, Bits) + end; +uniform_real_s({#{max:=_, next:=Next} = Alg, R0}) -> + %% Generate a 56 bit number. + %% Ignore the weak low bits for these old algorithms, + %% just produce something reasonable. + %% + %% Be sure to use only 53 bits when multiplying with + %% math:pow(2.0, -N) to avoid rounding which would make + %% "even" floats more probable than "odd". + %% + {V1, R1} = Next(R0), + M1 = ?MASK(56, V1), + if + ?BIT(55) =< M1 -> + %% We have 56 bits - waste 3 + {(M1 bsr 3) * math:pow(2.0, -53), {Alg, R1}}; + ?BIT(54) =< M1 -> + %% We have 55 bits - waste 2 + {(M1 bsr 2) * math:pow(2.0, -54), {Alg, R1}}; + ?BIT(53) =< M1 -> + %% We have 54 bits - waste 1 + {(M1 bsr 1) * math:pow(2.0, -55), {Alg, R1}}; + ?BIT(52) =< M1 -> + %% We have 53 bits - use all + {M1 * math:pow(2.0, -56), {Alg, R1}}; + true -> + %% Need more bits + {V2, R2} = Next(R1), + uniform_real_s(Alg, Next, M1, -56, R2, V2, 56) + end. + +uniform_real_s(Alg, _Next, M0, -1064, R1, V1, Bits) -> % 19*56 + %% This is a very theoretical bottom case. + %% The odds of getting here is about 2^-1008, + %% through a white box test case, or thanks to + %% a malfunctioning PRNG producing 18 56-bit zeros in a row. + %% + %% Fill up to 53 bits, we have at most 52 + B0 = (53 - ?BC(M0, 52)), % Missing bits + {(((M0 bsl B0) bor (V1 bsr (Bits - B0))) * math:pow(2.0, -1064 - B0)), + {Alg, R1}}; +uniform_real_s(Alg, Next, M0, BitNo, R1, V1, Bits) -> + if + %% Optimize the most probable. + %% Fill up to 53 bits. + ?BIT(51) =< M0 -> + %% We have 52 bits in M0 - need 1 + {(((M0 bsl 1) bor (V1 bsr (Bits - 1))) + * math:pow(2.0, BitNo - 1)), + {Alg, R1}}; + ?BIT(50) =< M0 -> + %% We have 51 bits in M0 - need 2 + {(((M0 bsl 2) bor (V1 bsr (Bits - 2))) + * math:pow(2.0, BitNo - 2)), + {Alg, R1}}; + ?BIT(49) =< M0 -> + %% We have 50 bits in M0 - need 3 + {(((M0 bsl 3) bor (V1 bsr (Bits - 3))) + * math:pow(2.0, BitNo - 3)), + {Alg, R1}}; + M0 == 0 -> + M1 = V1 bsr (Bits - 56), + if + ?BIT(55) =< M1 -> + %% We have 56 bits - waste 3 + {(M1 bsr 3) * math:pow(2.0, BitNo - 53), {Alg, R1}}; + ?BIT(54) =< M1 -> + %% We have 55 bits - waste 2 + {(M1 bsr 2) * math:pow(2.0, BitNo - 54), {Alg, R1}}; + ?BIT(53) =< M1 -> + %% We have 54 bits - waste 1 + {(M1 bsr 1) * math:pow(2.0, BitNo - 55), {Alg, R1}}; + ?BIT(52) =< M1 -> + %% We have 53 bits - use all + {M1 * math:pow(2.0, BitNo - 56), {Alg, R1}}; + BitNo =:= -1008 -> + %% Endgame + %% For the last round we can not have 14 zeros or more + %% at the top of M1 because then we will underflow, + %% so we need at least 43 bits + if + ?BIT(42) =< M1 -> + %% We have 43 bits - get the last bits + uniform_real_s(Alg, Next, M1, BitNo - 56, R1); + true -> + %% Would underflow 2^-1022 - start all over + %% + %% We could just crash here since the odds for + %% the PRNG being broken is much higher than + %% for a good PRNG generating this many zeros + %% in a row. Maybe we should write an error + %% report or call this a system limit...? + uniform_real_s({Alg, R1}) + end; + true -> + %% Need more bits + uniform_real_s(Alg, Next, M1, BitNo - 56, R1) + end; + true -> + %% Fill up to 53 bits + B0 = 53 - ?BC(M0, 49), % Number of bits we need to append + {(((M0 bsl B0) bor (V1 bsr (Bits - B0))) + * math:pow(2.0, BitNo - B0)), + {Alg, R1}} + end. +%% +uniform_real_s(#{bits:=Bits} = Alg, Next, M0, BitNo, R0) -> + {V1, R1} = Next(R0), + uniform_real_s(Alg, Next, M0, BitNo, R1, V1, Bits); +uniform_real_s(#{max:=_} = Alg, Next, M0, BitNo, R0) -> + {V1, R1} = Next(R0), + uniform_real_s(Alg, Next, M0, BitNo, R1, ?MASK(56, V1), 56). + %% jump/1: given a state, jump/1 %% returns a new state which is equivalent to that %% after a large number of call defined for each algorithm. @@ -1025,3 +1219,42 @@ normal_fi(Indx) -> 1.0214971439701471e-02,8.6165827693987316e-03,7.0508754713732268e-03, 5.5224032992509968e-03,4.0379725933630305e-03,2.6090727461021627e-03, 1.2602859304985975e-03}). + +%%%bitcount64(0) -> 0; +%%%bitcount64(V) -> 1 + bitcount(V, 64). +%%% +%%%-define( +%%% BITCOUNT(V, N), +%%% bitcount(V, N) -> +%%% if +%%% (1 bsl ((N) bsr 1)) =< (V) -> +%%% ((N) bsr 1) + bitcount((V) bsr ((N) bsr 1), ((N) bsr 1)); +%%% true -> +%%% bitcount((V), ((N) bsr 1)) +%%% end). +%%%?BITCOUNT(V, 64); +%%%?BITCOUNT(V, 32); +%%%?BITCOUNT(V, 16); +%%%?BITCOUNT(V, 8); +%%%?BITCOUNT(V, 4); +%%%?BITCOUNT(V, 2); +%%%bitcount(_, 1) -> 0. + +bc64(V) -> ?BC(V, 64). + +%% Linear from high bit - higher probability first gives faster execution +bc(V, B, N) when B =< V -> N; +bc(V, B, N) -> bc(V, B bsr 1, N - 1). + +make_float(S, E, M) -> + <<F/float>> = <<S:1, E:11, M:52>>, + F. + +float2str(N) -> + <<S:1, E:11, M:52>> = <<(float(N))/float>>, + lists:flatten( + io_lib:format( + "~c~c.~13.16.0bE~b", + [case S of 1 -> $-; 0 -> $+ end, + case E of 0 -> $0; _ -> $1 end, + M, E - 16#3ff])). diff --git a/lib/stdlib/src/slave.erl b/lib/stdlib/src/slave.erl index d7cf6386f5..b3f3206d67 100644 --- a/lib/stdlib/src/slave.erl +++ b/lib/stdlib/src/slave.erl @@ -320,7 +320,7 @@ mk_cmd(Host, Name, Args, Waiter, Prog0) -> %% emulator and flags as the test node. The return from lib:progname() %% could then typically be '/<full_path_to>/cerl -gcov'). quote_progname(Progname) -> - do_quote_progname(string:tokens(to_list(Progname)," ")). + do_quote_progname(string:lexemes(to_list(Progname)," ")). do_quote_progname([Prog]) -> "\""++Prog++"\""; diff --git a/lib/stdlib/src/stdlib.app.src b/lib/stdlib/src/stdlib.app.src index 3c449d3cb9..5fb48acfab 100644 --- a/lib/stdlib/src/stdlib.app.src +++ b/lib/stdlib/src/stdlib.app.src @@ -101,13 +101,14 @@ timer, unicode, unicode_util, + uri_string, win32reg, zip]}, {registered,[timer_server,rsh_starter,take_over_monitor,pool_master, dets]}, {applications, [kernel]}, {env, []}, - {runtime_dependencies, ["sasl-3.0","kernel-5.0","erts-9.0","crypto-3.3", + {runtime_dependencies, ["sasl-3.0","kernel-6.0","erts-10.0","crypto-3.3", "compiler-5.0"]} ]}. diff --git a/lib/stdlib/src/stdlib.appup.src b/lib/stdlib/src/stdlib.appup.src index 800c2c61f3..e4e3fb83e9 100644 --- a/lib/stdlib/src/stdlib.appup.src +++ b/lib/stdlib/src/stdlib.appup.src @@ -18,9 +18,7 @@ %% %CopyrightEnd% {"%VSN%", %% Up from - max one major revision back - [{<<"3\\.[0-3](\\.[0-9]+)*">>,[restart_new_emulator]}, % OTP-19.* - {<<"3\\.4(\\.[0-9]+)*">>,[restart_new_emulator]}], % OTP-20.* + [{<<"3\\.4(\\.[0-9]+)*">>,[restart_new_emulator]}], % OTP-20.* %% Down to - max one major revision back - [{<<"3\\.[0-3](\\.[0-9]+)*">>,[restart_new_emulator]}, % OTP-19.* - {<<"3\\.4(\\.[0-9]+)*">>,[restart_new_emulator]}] % OTP-20.* + [{<<"3\\.4(\\.[0-9]+)*">>,[restart_new_emulator]}] % OTP-20.* }. diff --git a/lib/stdlib/src/string.erl b/lib/stdlib/src/string.erl index ab041ff53c..e01bb7d85e 100644 --- a/lib/stdlib/src/string.erl +++ b/lib/stdlib/src/string.erl @@ -88,6 +88,15 @@ %%% May be removed -export([list_to_float/1, list_to_integer/1]). +-deprecated([{len,1},{concat,2}, + {str,2},{chr,2},{rchr,2},{rstr,2}, + {span,2},{cspan,2},{substr,'_'},{tokens,2}, + {chars,'_'}, + {copies,2},{words,'_'},{strip,'_'}, + {sub_word,'_'},{left,'_'},{right,'_'}, + {sub_string,'_'},{centre,'_'},{join,2}, + {to_upper,1}, {to_lower,1} + ]). %% Uses bifs: string:list_to_float/1 and string:list_to_integer/1 -spec list_to_float(String) -> {Float, Rest} | {'error', Reason} when diff --git a/lib/stdlib/src/supervisor.erl b/lib/stdlib/src/supervisor.erl index 7920e55930..e56415650f 100644 --- a/lib/stdlib/src/supervisor.erl +++ b/lib/stdlib/src/supervisor.erl @@ -31,7 +31,6 @@ %% Internal exports -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3, format_status/2]). --export([try_again_restart/2]). %% For release_handler only -export([get_callback_module/1]). @@ -79,6 +78,7 @@ | {RestartStrategy :: strategy(), Intensity :: non_neg_integer(), Period :: pos_integer()}. +-type children() :: {Ids :: [child_id()], Db :: #{child_id() => child_rec()}}. %%-------------------------------------------------------------------------- %% Defaults @@ -96,7 +96,7 @@ pid = undefined :: child() | {restarting, pid() | undefined} | [pid()], - name :: child_id(), + id :: child_id(), mfargs :: mfargs(), restart_type :: restart(), shutdown :: shutdown(), @@ -104,16 +104,11 @@ modules = [] :: modules()}). -type child_rec() :: #child{}. --define(DICTS, dict). --define(DICT, dict:dict). --define(SETS, sets). --define(SET, sets:set). - -record(state, {name, strategy :: strategy() | 'undefined', - children = [] :: [child_rec()], - dynamics :: {'dict', ?DICT(pid(), list())} - | {'set', ?SET(pid())} + children = {[],#{}} :: children(), % Ids in start order + dynamics :: {'maps', #{pid() => list()}} + | {'sets', sets:set(pid())} | 'undefined', intensity :: non_neg_integer() | 'undefined', period :: pos_integer() | 'undefined', @@ -124,6 +119,9 @@ -type state() :: #state{}. -define(is_simple(State), State#state.strategy =:= simple_one_for_one). +-define(is_temporary(_Child_), _Child_#child.restart_type=:=temporary). +-define(is_transient(_Child_), _Child_#child.restart_type=:=transient). +-define(is_permanent(_Child_), _Child_#child.restart_type=:=permanent). -callback init(Args :: term()) -> {ok, {SupFlags :: sup_flags(), [ChildSpec :: child_spec()]}} @@ -179,16 +177,16 @@ start_child(Supervisor, ChildSpec) -> | {'error', Error}, Error :: 'running' | 'restarting' | 'not_found' | 'simple_one_for_one' | term(). -restart_child(Supervisor, Name) -> - call(Supervisor, {restart_child, Name}). +restart_child(Supervisor, Id) -> + call(Supervisor, {restart_child, Id}). -spec delete_child(SupRef, Id) -> Result when SupRef :: sup_ref(), Id :: child_id(), Result :: 'ok' | {'error', Error}, Error :: 'running' | 'restarting' | 'not_found' | 'simple_one_for_one'. -delete_child(Supervisor, Name) -> - call(Supervisor, {delete_child, Name}). +delete_child(Supervisor, Id) -> + call(Supervisor, {delete_child, Id}). %%----------------------------------------------------------------- %% Func: terminate_child/2 @@ -202,16 +200,16 @@ delete_child(Supervisor, Name) -> Id :: pid() | child_id(), Result :: 'ok' | {'error', Error}, Error :: 'not_found' | 'simple_one_for_one'. -terminate_child(Supervisor, Name) -> - call(Supervisor, {terminate_child, Name}). +terminate_child(Supervisor, Id) -> + call(Supervisor, {terminate_child, Id}). -spec get_childspec(SupRef, Id) -> Result when SupRef :: sup_ref(), Id :: pid() | child_id(), Result :: {'ok', child_spec()} | {'error', Error}, Error :: 'not_found'. -get_childspec(Supervisor, Name) -> - call(Supervisor, {get_childspec, Name}). +get_childspec(Supervisor, Id) -> + call(Supervisor, {get_childspec, Id}). -spec which_children(SupRef) -> [{Id,Child,Type,Modules}] when SupRef :: sup_ref(), @@ -246,17 +244,6 @@ check_childspecs(ChildSpecs) when is_list(ChildSpecs) -> check_childspecs(X) -> {error, {badarg, X}}. %%%----------------------------------------------------------------- -%%% Called by restart/2 --spec try_again_restart(SupRef, Child) -> ok when - SupRef :: sup_ref(), - Child :: child_id() | pid(). -try_again_restart(Supervisor, Child) -> - cast(Supervisor, {try_again_restart, Child}). - -cast(Supervisor, Req) -> - gen_server:cast(Supervisor, Req). - -%%%----------------------------------------------------------------- %%% Called by release_handler during upgrade -spec get_callback_module(Pid) -> Module when Pid :: pid(), @@ -325,7 +312,7 @@ init_children(State, StartSpec) -> init_dynamic(State, [StartSpec]) -> case check_startspec([StartSpec]) of {ok, Children} -> - {ok, State#state{children = Children}}; + {ok, dyn_init(State#state{children = Children})}; Error -> {stop, {start_spec, Error}} end; @@ -334,35 +321,34 @@ init_dynamic(_State, StartSpec) -> %%----------------------------------------------------------------- %% Func: start_children/2 -%% Args: Children = [child_rec()] in start order +%% Args: Children = children() % Ids in start order %% SupName = {local, atom()} | {global, atom()} | {pid(), Mod} -%% Purpose: Start all children. The new list contains #child's +%% Purpose: Start all children. The new map contains #child's %% with pids. %% Returns: {ok, NChildren} | {error, NChildren, Reason} -%% NChildren = [child_rec()] in termination order (reversed -%% start order) +%% NChildren = children() % Ids in termination order +%% (reversed start order) %%----------------------------------------------------------------- -start_children(Children, SupName) -> start_children(Children, [], SupName). - -start_children([Child|Chs], NChildren, SupName) -> - case do_start_child(SupName, Child) of - {ok, undefined} when Child#child.restart_type =:= temporary -> - start_children(Chs, NChildren, SupName); - {ok, Pid} -> - start_children(Chs, [Child#child{pid = Pid}|NChildren], SupName); - {ok, Pid, _Extra} -> - start_children(Chs, [Child#child{pid = Pid}|NChildren], SupName); - {error, Reason} -> - report_error(start_error, Reason, Child, SupName), - {error, lists:reverse(Chs) ++ [Child | NChildren], - {failed_to_start_child,Child#child.name,Reason}} - end; -start_children([], NChildren, _SupName) -> - {ok, NChildren}. +start_children(Children, SupName) -> + Start = + fun(Id,Child) -> + case do_start_child(SupName, Child) of + {ok, undefined} when ?is_temporary(Child) -> + remove; + {ok, Pid} -> + {update,Child#child{pid = Pid}}; + {ok, Pid, _Extra} -> + {update,Child#child{pid = Pid}}; + {error, Reason} -> + report_error(start_error, Reason, Child, SupName), + {abort,{failed_to_start_child,Id,Reason}} + end + end, + children_map(Start,Children). do_start_child(SupName, Child) -> #child{mfargs = {M, F, Args}} = Child, - case catch apply(M, F, Args) of + case do_start_child_i(M, F, Args) of {ok, Pid} when is_pid(Pid) -> NChild = Child#child{pid = Pid}, report_progress(NChild, SupName), @@ -371,10 +357,8 @@ do_start_child(SupName, Child) -> NChild = Child#child{pid = Pid}, report_progress(NChild, SupName), {ok, Pid, Extra}; - ignore -> - {ok, undefined}; - {error, What} -> {error, What}; - What -> {error, What} + Other -> + Other end. do_start_child_i(M, F, A) -> @@ -400,17 +384,17 @@ do_start_child_i(M, F, A) -> -spec handle_call(call(), term(), state()) -> {'reply', term(), state()}. handle_call({start_child, EArgs}, _From, State) when ?is_simple(State) -> - Child = hd(State#state.children), + Child = get_dynamic_child(State), #child{mfargs = {M, F, A}} = Child, Args = A ++ EArgs, case do_start_child_i(M, F, Args) of {ok, undefined} -> {reply, {ok, undefined}, State}; {ok, Pid} -> - NState = save_dynamic_child(Child#child.restart_type, Pid, Args, State), + NState = dyn_store(Pid, Args, State), {reply, {ok, Pid}, NState}; {ok, Pid, Extra} -> - NState = save_dynamic_child(Child#child.restart_type, Pid, Args, State), + NState = dyn_store(Pid, Args, State), {reply, {ok, Pid, Extra}, NState}; What -> {reply, What, State} @@ -426,121 +410,94 @@ handle_call({start_child, ChildSpec}, _From, State) -> end; %% terminate_child for simple_one_for_one can only be done with pid -handle_call({terminate_child, Name}, _From, State) when not is_pid(Name), - ?is_simple(State) -> +handle_call({terminate_child, Id}, _From, State) when not is_pid(Id), + ?is_simple(State) -> {reply, {error, simple_one_for_one}, State}; -handle_call({terminate_child, Name}, _From, State) -> - case get_child(Name, State, ?is_simple(State)) of - {value, Child} -> - case do_terminate(Child, State#state.name) of - #child{restart_type=RT} when RT=:=temporary; ?is_simple(State) -> - {reply, ok, state_del_child(Child, State)}; - NChild -> - {reply, ok, replace_child(NChild, State)} - end; - false -> +handle_call({terminate_child, Id}, _From, State) -> + case find_child(Id, State) of + {ok, Child} -> + do_terminate(Child, State#state.name), + {reply, ok, del_child(Child, State)}; + error -> {reply, {error, not_found}, State} end; %% restart_child request is invalid for simple_one_for_one supervisors -handle_call({restart_child, _Name}, _From, State) when ?is_simple(State) -> +handle_call({restart_child, _Id}, _From, State) when ?is_simple(State) -> {reply, {error, simple_one_for_one}, State}; -handle_call({restart_child, Name}, _From, State) -> - case get_child(Name, State) of - {value, Child} when Child#child.pid =:= undefined -> +handle_call({restart_child, Id}, _From, State) -> + case find_child(Id, State) of + {ok, Child} when Child#child.pid =:= undefined -> case do_start_child(State#state.name, Child) of {ok, Pid} -> - NState = replace_child(Child#child{pid = Pid}, State), + NState = set_pid(Pid, Id, State), {reply, {ok, Pid}, NState}; {ok, Pid, Extra} -> - NState = replace_child(Child#child{pid = Pid}, State), + NState = set_pid(Pid, Id, State), {reply, {ok, Pid, Extra}, NState}; Error -> {reply, Error, State} end; - {value, #child{pid=?restarting(_)}} -> + {ok, #child{pid=?restarting(_)}} -> {reply, {error, restarting}, State}; - {value, _} -> + {ok, _} -> {reply, {error, running}, State}; _ -> {reply, {error, not_found}, State} end; %% delete_child request is invalid for simple_one_for_one supervisors -handle_call({delete_child, _Name}, _From, State) when ?is_simple(State) -> +handle_call({delete_child, _Id}, _From, State) when ?is_simple(State) -> {reply, {error, simple_one_for_one}, State}; -handle_call({delete_child, Name}, _From, State) -> - case get_child(Name, State) of - {value, Child} when Child#child.pid =:= undefined -> - NState = remove_child(Child, State), +handle_call({delete_child, Id}, _From, State) -> + case find_child(Id, State) of + {ok, Child} when Child#child.pid =:= undefined -> + NState = remove_child(Id, State), {reply, ok, NState}; - {value, #child{pid=?restarting(_)}} -> + {ok, #child{pid=?restarting(_)}} -> {reply, {error, restarting}, State}; - {value, _} -> + {ok, _} -> {reply, {error, running}, State}; _ -> {reply, {error, not_found}, State} end; -handle_call({get_childspec, Name}, _From, State) -> - case get_child(Name, State, ?is_simple(State)) of - {value, Child} -> +handle_call({get_childspec, Id}, _From, State) -> + case find_child(Id, State) of + {ok, Child} -> {reply, {ok, child_to_spec(Child)}, State}; - false -> + error -> {reply, {error, not_found}, State} end; -handle_call(which_children, _From, #state{children = [#child{restart_type = temporary, - child_type = CT, - modules = Mods}]} = - State) when ?is_simple(State) -> - Reply = lists:map(fun(Pid) -> {undefined, Pid, CT, Mods} end, - ?SETS:to_list(dynamics_db(temporary, State#state.dynamics))), - {reply, Reply, State}; - -handle_call(which_children, _From, #state{children = [#child{restart_type = RType, - child_type = CT, - modules = Mods}]} = - State) when ?is_simple(State) -> - Reply = lists:map(fun({?restarting(_),_}) -> {undefined,restarting,CT,Mods}; - ({Pid, _}) -> {undefined, Pid, CT, Mods} end, - ?DICTS:to_list(dynamics_db(RType, State#state.dynamics))), +handle_call(which_children, _From, State) when ?is_simple(State) -> + #child{child_type = CT,modules = Mods} = get_dynamic_child(State), + Reply = dyn_map(fun(?restarting(_)) -> {undefined, restarting, CT, Mods}; + (Pid) -> {undefined, Pid, CT, Mods} + end, State), {reply, Reply, State}; handle_call(which_children, _From, State) -> Resp = - lists:map(fun(#child{pid = ?restarting(_), name = Name, - child_type = ChildType, modules = Mods}) -> - {Name, restarting, ChildType, Mods}; - (#child{pid = Pid, name = Name, - child_type = ChildType, modules = Mods}) -> - {Name, Pid, ChildType, Mods} - end, - State#state.children), + children_to_list( + fun(Id,#child{pid = ?restarting(_), + child_type = ChildType, modules = Mods}) -> + {Id, restarting, ChildType, Mods}; + (Id,#child{pid = Pid, + child_type = ChildType, modules = Mods}) -> + {Id, Pid, ChildType, Mods} + end, + State#state.children), {reply, Resp, State}; - -handle_call(count_children, _From, #state{children = [#child{restart_type = temporary, - child_type = CT}]} = State) - when ?is_simple(State) -> - Sz = ?SETS:size(dynamics_db(temporary, State#state.dynamics)), - Reply = case CT of - supervisor -> [{specs, 1}, {active, Sz}, - {supervisors, Sz}, {workers, 0}]; - worker -> [{specs, 1}, {active, Sz}, - {supervisors, 0}, {workers, Sz}] - end, - {reply, Reply, State}; - -handle_call(count_children, _From, #state{dynamic_restarts = Restarts, - children = [#child{restart_type = RType, - child_type = CT}]} = State) +handle_call(count_children, _From, #state{dynamic_restarts = Restarts} = State) when ?is_simple(State) -> - Sz = ?DICTS:size(dynamics_db(RType, State#state.dynamics)), - Active = Sz - Restarts, + #child{child_type = CT} = get_dynamic_child(State), + Sz = dyn_size(State), + Active = Sz - Restarts, % Restarts is always 0 for temporary children Reply = case CT of supervisor -> [{specs, 1}, {active, Active}, {supervisors, Sz}, {workers, 0}]; @@ -552,16 +509,15 @@ handle_call(count_children, _From, #state{dynamic_restarts = Restarts, handle_call(count_children, _From, State) -> %% Specs and children are together on the children list... {Specs, Active, Supers, Workers} = - lists:foldl(fun(Child, Counts) -> - count_child(Child, Counts) - end, {0,0,0,0}, State#state.children), + children_fold(fun(_Id, Child, Counts) -> + count_child(Child, Counts) + end, {0,0,0,0}, State#state.children), %% Reformat counts to a property list. Reply = [{specs, Specs}, {active, Active}, {supervisors, Supers}, {workers, Workers}], {reply, Reply, State}. - count_child(#child{pid = Pid, child_type = worker}, {Specs, Active, Supers, Workers}) -> case is_pid(Pid) andalso is_process_alive(Pid) of @@ -575,34 +531,15 @@ count_child(#child{pid = Pid, child_type = supervisor}, false -> {Specs+1, Active, Supers+1, Workers} end. - %%% If a restart attempt failed, this message is cast %%% from restart/2 in order to give gen_server the chance to %%% check it's inbox before trying again. --spec handle_cast({try_again_restart, child_id() | pid()}, state()) -> +-spec handle_cast({try_again_restart, child_id() | {'restarting',pid()}}, state()) -> {'noreply', state()} | {stop, shutdown, state()}. -handle_cast({try_again_restart,Pid}, #state{children=[Child]}=State) - when ?is_simple(State) -> - RT = Child#child.restart_type, - RPid = restarting(Pid), - case dynamic_child_args(RPid, RT, State#state.dynamics) of - {ok, Args} -> - {M, F, _} = Child#child.mfargs, - NChild = Child#child{pid = RPid, mfargs = {M, F, Args}}, - case restart(NChild,State) of - {ok, State1} -> - {noreply, State1}; - {shutdown, State1} -> - {stop, shutdown, State1} - end; - error -> - {noreply, State} - end; - -handle_cast({try_again_restart,Name}, State) -> - case lists:keyfind(Name,#child.name,State#state.children) of - Child = #child{pid=?restarting(_)} -> +handle_cast({try_again_restart,TryAgainId}, State) -> + case find_child_and_args(TryAgainId, State) of + {ok, Child = #child{pid=?restarting(_)}} -> case restart(Child,State) of {ok, State1} -> {noreply, State1}; @@ -637,10 +574,8 @@ handle_info(Msg, State) -> %% -spec terminate(term(), state()) -> 'ok'. -terminate(_Reason, #state{children=[Child]} = State) when ?is_simple(State) -> - terminate_dynamic_children(Child, dynamics_db(Child#child.restart_type, - State#state.dynamics), - State#state.name); +terminate(_Reason, State) when ?is_simple(State) -> + terminate_dynamic_children(State); terminate(_Reason, State) -> terminate_children(State#state.children, State#state.name). @@ -675,8 +610,8 @@ code_change(_, State, _) -> update_childspec(State, StartSpec) when ?is_simple(State) -> case check_startspec(StartSpec) of - {ok, [Child]} -> - {ok, State#state{children = [Child]}}; + {ok, {[_],_}=Children} -> + {ok, State#state{children = Children}}; Error -> {error, Error} end; @@ -690,39 +625,36 @@ update_childspec(State, StartSpec) -> {error, Error} end. -update_childspec1([Child|OldC], Children, KeepOld) -> - case update_chsp(Child, Children) of - {ok,NewChildren} -> - update_childspec1(OldC, NewChildren, KeepOld); +update_childspec1({[Id|OldIds], OldDb}, {Ids,Db}, KeepOld) -> + case update_chsp(maps:get(Id,OldDb), Db) of + {ok,NewDb} -> + update_childspec1({OldIds,OldDb}, {Ids,NewDb}, KeepOld); false -> - update_childspec1(OldC, Children, [Child|KeepOld]) + update_childspec1({OldIds,OldDb}, {Ids,Db}, [Id|KeepOld]) end; -update_childspec1([], Children, KeepOld) -> +update_childspec1({[],OldDb}, {Ids,Db}, KeepOld) -> + KeepOldDb = maps:with(KeepOld,OldDb), %% Return them in (kept) reverse start order. - lists:reverse(Children ++ KeepOld). - -update_chsp(OldCh, Children) -> - case lists:map(fun(Ch) when OldCh#child.name =:= Ch#child.name -> - Ch#child{pid = OldCh#child.pid}; - (Ch) -> - Ch - end, - Children) of - Children -> - false; % OldCh not found in new spec. - NewC -> - {ok, NewC} + {lists:reverse(Ids ++ KeepOld),maps:merge(KeepOldDb,Db)}. + +update_chsp(#child{id=Id}=OldChild, NewDb) -> + case maps:find(Id, NewDb) of + {ok,Child} -> + {ok,NewDb#{Id => Child#child{pid = OldChild#child.pid}}}; + error -> % Id not found in new spec. + false end. + %%% --------------------------------------------------- %%% Start a new child. %%% --------------------------------------------------- handle_start_child(Child, State) -> - case get_child(Child#child.name, State) of - false -> + case find_child(Child#child.id, State) of + error -> case do_start_child(State#state.name, Child) of - {ok, undefined} when Child#child.restart_type =:= temporary -> + {ok, undefined} when ?is_temporary(Child) -> {{ok, undefined}, State}; {ok, Pid} -> {{ok, Pid}, save_child(Child#child{pid = Pid}, State)}; @@ -731,9 +663,9 @@ handle_start_child(Child, State) -> {error, What} -> {{error, {What, Child}}, State} end; - {value, OldChild} when is_pid(OldChild#child.pid) -> + {ok, OldChild} when is_pid(OldChild#child.pid) -> {{error, {already_started, OldChild#child.pid}}, State}; - {value, _OldChild} -> + {ok, _OldChild} -> {{error, already_present}, State} end. @@ -742,63 +674,45 @@ handle_start_child(Child, State) -> %%% Returns: {ok, state()} | {shutdown, state()} %%% --------------------------------------------------- -restart_child(Pid, Reason, #state{children = [Child]} = State) when ?is_simple(State) -> - RestartType = Child#child.restart_type, - case dynamic_child_args(Pid, RestartType, State#state.dynamics) of - {ok, Args} -> - {M, F, _} = Child#child.mfargs, - NChild = Child#child{pid = Pid, mfargs = {M, F, Args}}, - do_restart(RestartType, Reason, NChild, State); - error -> - {ok, State} - end; - restart_child(Pid, Reason, State) -> - Children = State#state.children, - case lists:keyfind(Pid, #child.pid, Children) of - #child{restart_type = RestartType} = Child -> - do_restart(RestartType, Reason, Child, State); - false -> + case find_child_and_args(Pid, State) of + {ok, Child} -> + do_restart(Reason, Child, State); + error -> {ok, State} end. -do_restart(permanent, Reason, Child, State) -> +do_restart(Reason, Child, State) when ?is_permanent(Child) -> report_error(child_terminated, Reason, Child, State#state.name), restart(Child, State); -do_restart(_, normal, Child, State) -> - NState = state_del_child(Child, State), +do_restart(normal, Child, State) -> + NState = del_child(Child, State), {ok, NState}; -do_restart(_, shutdown, Child, State) -> - NState = state_del_child(Child, State), +do_restart(shutdown, Child, State) -> + NState = del_child(Child, State), {ok, NState}; -do_restart(_, {shutdown, _Term}, Child, State) -> - NState = state_del_child(Child, State), +do_restart({shutdown, _Term}, Child, State) -> + NState = del_child(Child, State), {ok, NState}; -do_restart(transient, Reason, Child, State) -> +do_restart(Reason, Child, State) when ?is_transient(Child) -> report_error(child_terminated, Reason, Child, State#state.name), restart(Child, State); -do_restart(temporary, Reason, Child, State) -> +do_restart(Reason, Child, State) when ?is_temporary(Child) -> report_error(child_terminated, Reason, Child, State#state.name), - NState = state_del_child(Child, State), + NState = del_child(Child, State), {ok, NState}. restart(Child, State) -> case add_restart(State) of {ok, NState} -> case restart(NState#state.strategy, Child, NState) of - {try_again,NState2} -> + {{try_again, TryAgainId}, NState2} -> %% Leaving control back to gen_server before %% trying again. This way other incoming requsts %% for the supervisor can be handled - e.g. a %% shutdown request for the supervisor or the %% child. - Id = if ?is_simple(State) -> Child#child.pid; - true -> Child#child.name - end, - ok = try_again_restart(self(), Id), - {ok,NState2}; - {try_again, NState2, #child{name=ChName}} -> - ok = try_again_restart(self(), ChName), + try_again_restart(TryAgainId), {ok,NState2}; Other -> Other @@ -806,124 +720,111 @@ restart(Child, State) -> {terminate, NState} -> report_error(shutdown, reached_max_restart_intensity, Child, State#state.name), - {shutdown, remove_child(Child, NState)} + {shutdown, del_child(Child, NState)} end. restart(simple_one_for_one, Child, State0) -> #child{pid = OldPid, mfargs = {M, F, A}} = Child, - State = case OldPid of + State1 = case OldPid of ?restarting(_) -> NRes = State0#state.dynamic_restarts - 1, State0#state{dynamic_restarts = NRes}; _ -> State0 end, - Dynamics = ?DICTS:erase(OldPid, dynamics_db(Child#child.restart_type, - State#state.dynamics)), + State2 = dyn_erase(OldPid, State1), case do_start_child_i(M, F, A) of {ok, Pid} -> - DynamicsDb = {dict, ?DICTS:store(Pid, A, Dynamics)}, - NState = State#state{dynamics = DynamicsDb}, + NState = dyn_store(Pid, A, State2), {ok, NState}; {ok, Pid, _Extra} -> - DynamicsDb = {dict, ?DICTS:store(Pid, A, Dynamics)}, - NState = State#state{dynamics = DynamicsDb}, + NState = dyn_store(Pid, A, State2), {ok, NState}; {error, Error} -> - NRestarts = State#state.dynamic_restarts + 1, - DynamicsDb = {dict, ?DICTS:store(restarting(OldPid), A, Dynamics)}, - NState = State#state{dynamic_restarts = NRestarts, - dynamics = DynamicsDb}, - report_error(start_error, Error, Child, State#state.name), - {try_again, NState} + ROldPid = restarting(OldPid), + NRestarts = State2#state.dynamic_restarts + 1, + State3 = State2#state{dynamic_restarts = NRestarts}, + NState = dyn_store(ROldPid, A, State3), + report_error(start_error, Error, Child, NState#state.name), + {{try_again, ROldPid}, NState} end; -restart(one_for_one, Child, State) -> +restart(one_for_one, #child{id=Id} = Child, State) -> OldPid = Child#child.pid, case do_start_child(State#state.name, Child) of {ok, Pid} -> - NState = replace_child(Child#child{pid = Pid}, State), + NState = set_pid(Pid, Id, State), {ok, NState}; {ok, Pid, _Extra} -> - NState = replace_child(Child#child{pid = Pid}, State), + NState = set_pid(Pid, Id, State), {ok, NState}; {error, Reason} -> - NState = replace_child(Child#child{pid = restarting(OldPid)}, State), + NState = set_pid(restarting(OldPid), Id, State), report_error(start_error, Reason, Child, State#state.name), - {try_again, NState} - end; -restart(rest_for_one, Child, State) -> - {ChAfter, ChBefore} = split_child(Child#child.pid, State#state.children), - ChAfter2 = terminate_children(ChAfter, State#state.name), - case start_children(ChAfter2, State#state.name) of - {ok, ChAfter3} -> - {ok, State#state{children = ChAfter3 ++ ChBefore}}; - {error, ChAfter3, {failed_to_start_child, ChName, _Reason}} - when ChName =:= Child#child.name -> - NChild = Child#child{pid=restarting(Child#child.pid)}, - NState = State#state{children = ChAfter3 ++ ChBefore}, - {try_again, replace_child(NChild,NState)}; - {error, ChAfter3, {failed_to_start_child, ChName, _Reason}} -> - NChild = lists:keyfind(ChName, #child.name, ChAfter3), - NChild2 = NChild#child{pid=?restarting(undefined)}, - NState = State#state{children = ChAfter3 ++ ChBefore}, - {try_again, replace_child(NChild2,NState), NChild2} + {{try_again,Id}, NState} end; -restart(one_for_all, Child, State) -> - Children1 = del_child(Child#child.pid, State#state.children), - Children2 = terminate_children(Children1, State#state.name), - case start_children(Children2, State#state.name) of - {ok, NChs} -> - {ok, State#state{children = NChs}}; - {error, NChs, {failed_to_start_child, ChName, _Reason}} - when ChName =:= Child#child.name -> - NChild = Child#child{pid=restarting(Child#child.pid)}, - NState = State#state{children = NChs}, - {try_again, replace_child(NChild,NState)}; - {error, NChs, {failed_to_start_child, ChName, _Reason}} -> - NChild = lists:keyfind(ChName, #child.name, NChs), - NChild2 = NChild#child{pid=?restarting(undefined)}, - NState = State#state{children = NChs}, - {try_again, replace_child(NChild2,NState), NChild2} +restart(rest_for_one, #child{id=Id} = Child, #state{name=SupName} = State) -> + {ChAfter, ChBefore} = split_child(Id, State#state.children), + {Return, ChAfter2} = restart_multiple_children(Child, ChAfter, SupName), + {Return, State#state{children = append(ChAfter2,ChBefore)}}; +restart(one_for_all, Child, #state{name=SupName} = State) -> + Children1 = del_child(Child#child.id, State#state.children), + {Return, NChildren} = restart_multiple_children(Child, Children1, SupName), + {Return, State#state{children = NChildren}}. + +restart_multiple_children(Child, Children, SupName) -> + Children1 = terminate_children(Children, SupName), + case start_children(Children1, SupName) of + {ok, NChildren} -> + {ok, NChildren}; + {error, NChildren, {failed_to_start_child, FailedId, _Reason}} -> + NewPid = if FailedId =:= Child#child.id -> + restarting(Child#child.pid); + true -> + ?restarting(undefined) + end, + {{try_again, FailedId}, set_pid(NewPid,FailedId,NChildren)} end. restarting(Pid) when is_pid(Pid) -> ?restarting(Pid); restarting(RPid) -> RPid. +-spec try_again_restart(child_id() | {'restarting',pid()}) -> 'ok'. +try_again_restart(TryAgainId) -> + gen_server:cast(self(), {try_again_restart, TryAgainId}). + %%----------------------------------------------------------------- %% Func: terminate_children/2 -%% Args: Children = [child_rec()] in termination order +%% Args: Children = children() % Ids in termination order %% SupName = {local, atom()} | {global, atom()} | {pid(),Mod} -%% Returns: NChildren = [child_rec()] in -%% startup order (reversed termination order) +%% Returns: NChildren = children() % Ids in startup order +%% % (reversed termination order) %%----------------------------------------------------------------- terminate_children(Children, SupName) -> - terminate_children(Children, SupName, []). - -%% Temporary children should not be restarted and thus should -%% be skipped when building the list of terminated children, although -%% we do want them to be shut down as many functions from this module -%% use this function to just clear everything. -terminate_children([Child = #child{restart_type=temporary} | Children], SupName, Res) -> - _ = do_terminate(Child, SupName), - terminate_children(Children, SupName, Res); -terminate_children([Child | Children], SupName, Res) -> - NChild = do_terminate(Child, SupName), - terminate_children(Children, SupName, [NChild | Res]); -terminate_children([], _SupName, Res) -> - Res. + Terminate = + fun(_Id,Child) when ?is_temporary(Child) -> + %% Temporary children should not be restarted and thus should + %% be skipped when building the list of terminated children. + do_terminate(Child, SupName), + remove; + (_Id,Child) -> + do_terminate(Child, SupName), + {update,Child#child{pid=undefined}} + end, + {ok,NChildren} = children_map(Terminate, Children), + NChildren. do_terminate(Child, SupName) when is_pid(Child#child.pid) -> case shutdown(Child#child.pid, Child#child.shutdown) of ok -> ok; - {error, normal} when Child#child.restart_type =/= permanent -> + {error, normal} when not (?is_permanent(Child)) -> ok; {error, OtherReason} -> report_error(shutdown_error, OtherReason, Child, SupName) end, - Child#child{pid = undefined}; -do_terminate(Child, _SupName) -> - Child#child{pid = undefined}. + ok; +do_terminate(_Child, _SupName) -> + ok. %%----------------------------------------------------------------- %% Shutdowns a child. We must check the EXIT value @@ -996,66 +897,50 @@ monitor_child(Pid) -> ok end. - %%----------------------------------------------------------------- -%% Func: terminate_dynamic_children/3 -%% Args: Child = child_rec() -%% Dynamics = ?DICT() | ?SET() -%% SupName = {local, atom()} | {global, atom()} | {pid(),Mod} +%% Func: terminate_dynamic_children/1 +%% Args: State %% Returns: ok %% -%% %% Shutdown all dynamic children. This happens when the supervisor is %% stopped. Because the supervisor can have millions of dynamic children, we -%% can have an significative overhead here. +%% can have a significative overhead here. %%----------------------------------------------------------------- -terminate_dynamic_children(Child, Dynamics, SupName) -> - {Pids, EStack0} = monitor_dynamic_children(Child, Dynamics), - Sz = ?SETS:size(Pids), +terminate_dynamic_children(State) -> + Child = get_dynamic_child(State), + {Pids, EStack0} = monitor_dynamic_children(Child,State), + Sz = sets:size(Pids), EStack = case Child#child.shutdown of brutal_kill -> - ?SETS:fold(fun(P, _) -> exit(P, kill) end, ok, Pids), + sets:fold(fun(P, _) -> exit(P, kill) end, ok, Pids), wait_dynamic_children(Child, Pids, Sz, undefined, EStack0); infinity -> - ?SETS:fold(fun(P, _) -> exit(P, shutdown) end, ok, Pids), + sets:fold(fun(P, _) -> exit(P, shutdown) end, ok, Pids), wait_dynamic_children(Child, Pids, Sz, undefined, EStack0); Time -> - ?SETS:fold(fun(P, _) -> exit(P, shutdown) end, ok, Pids), + sets:fold(fun(P, _) -> exit(P, shutdown) end, ok, Pids), TRef = erlang:start_timer(Time, self(), kill), wait_dynamic_children(Child, Pids, Sz, TRef, EStack0) end, %% Unroll stacked errors and report them - ?DICTS:fold(fun(Reason, Ls, _) -> - report_error(shutdown_error, Reason, - Child#child{pid=Ls}, SupName) - end, ok, EStack). - - -monitor_dynamic_children(#child{restart_type=temporary}, Dynamics) -> - ?SETS:fold(fun(P, {Pids, EStack}) -> - case monitor_child(P) of - ok -> - {?SETS:add_element(P, Pids), EStack}; - {error, normal} -> - {Pids, EStack}; - {error, Reason} -> - {Pids, ?DICTS:append(Reason, P, EStack)} - end - end, {?SETS:new(), ?DICTS:new()}, Dynamics); -monitor_dynamic_children(#child{restart_type=RType}, Dynamics) -> - ?DICTS:fold(fun(P, _, {Pids, EStack}) when is_pid(P) -> - case monitor_child(P) of - ok -> - {?SETS:add_element(P, Pids), EStack}; - {error, normal} when RType =/= permanent -> - {Pids, EStack}; - {error, Reason} -> - {Pids, ?DICTS:append(Reason, P, EStack)} - end; - (?restarting(_), _, {Pids, EStack}) -> - {Pids, EStack} - end, {?SETS:new(), ?DICTS:new()}, Dynamics). - + dict:fold(fun(Reason, Ls, _) -> + report_error(shutdown_error, Reason, + Child#child{pid=Ls}, State#state.name) + end, ok, EStack). + +monitor_dynamic_children(Child,State) -> + dyn_fold(fun(P,{Pids, EStack}) when is_pid(P) -> + case monitor_child(P) of + ok -> + {sets:add_element(P, Pids), EStack}; + {error, normal} when not (?is_permanent(Child)) -> + {Pids, EStack}; + {error, Reason} -> + {Pids, dict:append(Reason, P, EStack)} + end; + (?restarting(_), {Pids, EStack}) -> + {Pids, EStack} + end, {sets:new(), dict:new()}, State). wait_dynamic_children(_Child, _Pids, 0, undefined, EStack) -> EStack; @@ -1073,39 +958,38 @@ wait_dynamic_children(#child{shutdown=brutal_kill} = Child, Pids, Sz, TRef, EStack) -> receive {'DOWN', _MRef, process, Pid, killed} -> - wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1, + wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1, TRef, EStack); {'DOWN', _MRef, process, Pid, Reason} -> - wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1, - TRef, ?DICTS:append(Reason, Pid, EStack)) + wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1, + TRef, dict:append(Reason, Pid, EStack)) end; -wait_dynamic_children(#child{restart_type=RType} = Child, Pids, Sz, - TRef, EStack) -> +wait_dynamic_children(Child, Pids, Sz, TRef, EStack) -> receive {'DOWN', _MRef, process, Pid, shutdown} -> - wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1, + wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1, TRef, EStack); {'DOWN', _MRef, process, Pid, {shutdown, _}} -> - wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1, + wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1, TRef, EStack); - {'DOWN', _MRef, process, Pid, normal} when RType =/= permanent -> - wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1, + {'DOWN', _MRef, process, Pid, normal} when not (?is_permanent(Child)) -> + wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1, TRef, EStack); {'DOWN', _MRef, process, Pid, Reason} -> - wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1, - TRef, ?DICTS:append(Reason, Pid, EStack)); + wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1, + TRef, dict:append(Reason, Pid, EStack)); {timeout, TRef, kill} -> - ?SETS:fold(fun(P, _) -> exit(P, kill) end, ok, Pids), + sets:fold(fun(P, _) -> exit(P, kill) end, ok, Pids), wait_dynamic_children(Child, Pids, Sz, undefined, EStack) end. %%----------------------------------------------------------------- -%% Child/State manipulating functions. +%% Access #state.children %%----------------------------------------------------------------- %% Note we do not want to save the parameter list for temporary processes as @@ -1113,114 +997,184 @@ wait_dynamic_children(#child{restart_type=RType} = Child, Pids, Sz, %% Especially for dynamic children to simple_one_for_one supervisors %% it could become very costly as it is not uncommon to spawn %% very many such processes. -save_child(#child{restart_type = temporary, - mfargs = {M, F, _}} = Child, #state{children = Children} = State) -> - State#state{children = [Child#child{mfargs = {M, F, undefined}} |Children]}; -save_child(Child, #state{children = Children} = State) -> - State#state{children = [Child |Children]}. - -save_dynamic_child(temporary, Pid, _, #state{dynamics = Dynamics} = State) -> - DynamicsDb = dynamics_db(temporary, Dynamics), - State#state{dynamics = {set, ?SETS:add_element(Pid, DynamicsDb)}}; -save_dynamic_child(RestartType, Pid, Args, #state{dynamics = Dynamics} = State) -> - DynamicsDb = dynamics_db(RestartType, Dynamics), - State#state{dynamics = {dict, ?DICTS:store(Pid, Args, DynamicsDb)}}. - -dynamics_db(temporary, undefined) -> - ?SETS:new(); -dynamics_db(_, undefined) -> - ?DICTS:new(); -dynamics_db(_, {_Tag, DynamicsDb}) -> - DynamicsDb. - -dynamic_child_args(_Pid, temporary, _DynamicsDb) -> - {ok, undefined}; -dynamic_child_args(Pid, _RT, {dict, DynamicsDb}) -> - ?DICTS:find(Pid, DynamicsDb); -dynamic_child_args(_Pid, _RT, undefined) -> - error. - -state_del_child(#child{pid = Pid, restart_type = temporary}, State) when ?is_simple(State) -> - NDynamics = ?SETS:del_element(Pid, dynamics_db(temporary, State#state.dynamics)), - State#state{dynamics = {set, NDynamics}}; -state_del_child(#child{pid = Pid, restart_type = RType}, State) when ?is_simple(State) -> - NDynamics = ?DICTS:erase(Pid, dynamics_db(RType, State#state.dynamics)), - State#state{dynamics = {dict, NDynamics}}; -state_del_child(Child, State) -> - NChildren = del_child(Child#child.name, State#state.children), - State#state{children = NChildren}. - -del_child(Name, [Ch|Chs]) when Ch#child.name =:= Name, Ch#child.restart_type =:= temporary -> - Chs; -del_child(Name, [Ch|Chs]) when Ch#child.name =:= Name -> - [Ch#child{pid = undefined} | Chs]; -del_child(Pid, [Ch|Chs]) when Ch#child.pid =:= Pid, Ch#child.restart_type =:= temporary -> - Chs; -del_child(Pid, [Ch|Chs]) when Ch#child.pid =:= Pid -> - [Ch#child{pid = undefined} | Chs]; -del_child(Name, [Ch|Chs]) -> - [Ch|del_child(Name, Chs)]; -del_child(_, []) -> - []. +-spec save_child(child_rec(), state()) -> state(). +save_child(#child{mfargs = {M, F, _}} = Child, State) when ?is_temporary(Child) -> + do_save_child(Child#child{mfargs = {M, F, undefined}}, State); +save_child(Child, State) -> + do_save_child(Child, State). + +-spec do_save_child(child_rec(), state()) -> state(). +do_save_child(#child{id = Id} = Child, #state{children = {Ids,Db}} = State) -> + State#state{children = {[Id|Ids],Db#{Id => Child}}}. + +-spec del_child(child_rec(), state()) -> state(); + (child_id(), children()) -> children(). +del_child(#child{pid = Pid}, State) when ?is_simple(State) -> + dyn_erase(Pid,State); +del_child(Child, State) when is_record(Child,child), is_record(State,state) -> + NChildren = del_child(Child#child.id, State#state.children), + State#state{children = NChildren}; +del_child(Id, {Ids,Db}) -> + case maps:get(Id, Db) of + Child when Child#child.restart_type =:= temporary -> + {lists:delete(Id, Ids), maps:remove(Id, Db)}; + Child -> + {Ids, Db#{Id=>Child#child{pid=undefined}}} + end. -%% Chs = [S4, S3, Ch, S1, S0] -%% Ret: {[S4, S3, Ch], [S1, S0]} -split_child(Name, Chs) -> - split_child(Name, Chs, []). - -split_child(Name, [Ch|Chs], After) when Ch#child.name =:= Name -> - {lists:reverse([Ch#child{pid = undefined} | After]), Chs}; -split_child(Pid, [Ch|Chs], After) when Ch#child.pid =:= Pid -> - {lists:reverse([Ch#child{pid = undefined} | After]), Chs}; -split_child(Name, [Ch|Chs], After) -> - split_child(Name, Chs, [Ch | After]); -split_child(_, [], After) -> - {lists:reverse(After), []}. - -get_child(Name, State) -> - get_child(Name, State, false). - -get_child(Pid, State, AllowPid) when AllowPid, is_pid(Pid) -> - get_dynamic_child(Pid, State); -get_child(Name, State, _) -> - lists:keysearch(Name, #child.name, State#state.children). - -get_dynamic_child(Pid, #state{children=[Child], dynamics=Dynamics}) -> - case is_dynamic_pid(Pid, Dynamics) of - true -> - {value, Child#child{pid=Pid}}; - false -> - RPid = restarting(Pid), - case is_dynamic_pid(RPid, Dynamics) of - true -> - {value, Child#child{pid=RPid}}; - false -> +%% In: {[S4, S3, Ch, S1, S0],Db} +%% Ret: {{[S4, S3, Ch],Db1}, {[S1, S0],Db2}} +%% Db1 and Db2 contain the keys in the lists they are associated with. +-spec split_child(child_id(), children()) -> {children(), children()}. +split_child(Id, {Ids,Db}) -> + {IdsAfter,IdsBefore} = split_ids(Id, Ids, []), + DbBefore = maps:with(IdsBefore,Db), + #{Id:=Ch} = DbAfter = maps:with(IdsAfter,Db), + {{IdsAfter,DbAfter#{Id=>Ch#child{pid=undefined}}},{IdsBefore,DbBefore}}. + +split_ids(Id, [Id|Ids], After) -> + {lists:reverse([Id|After]), Ids}; +split_ids(Id, [Other|Ids], After) -> + split_ids(Id, Ids, [Other | After]). + +%% Find the child record for a given Pid (dynamic child) or Id +%% (non-dynamic child). This is called from the API functions. +-spec find_child(pid() | child_id(), state()) -> {ok,child_rec()} | error. +find_child(Pid, State) when is_pid(Pid), ?is_simple(State) -> + case find_dynamic_child(Pid, State) of + error -> + case find_dynamic_child(restarting(Pid), State) of + error -> case erlang:is_process_alive(Pid) of - true -> false; - false -> {value, Child} - end - end + true -> error; + false -> {ok, get_dynamic_child(State)} + end; + Other -> + Other + end; + Other -> + Other + end; +find_child(Id, #state{children = {_Ids,Db}}) -> + maps:find(Id, Db). + +%% Get the child record - either by child id or by pid. If +%% simple_one_for_one, then insert the pid and args into the returned +%% child record. This is called when trying to restart the child. +-spec find_child_and_args(IdOrPid, state()) -> {ok, child_rec()} | error when + IdOrPid :: pid() | {restarting,pid()} | child_id(). +find_child_and_args(Pid, State) when ?is_simple(State) -> + case find_dynamic_child(Pid, State) of + {ok,#child{mfargs={M,F,_}} = Child} -> + {ok, Args} = dyn_args(Pid, State), + {ok, Child#child{mfargs = {M, F, Args}}}; + error -> + error + end; +find_child_and_args(Pid, State) when is_pid(Pid) -> + find_child_by_pid(Pid, State); +find_child_and_args(Id, #state{children={_Ids,Db}}) -> + maps:find(Id, Db). + +%% Given the pid, find the child record for a dynamic child, and +%% include the pid in the returned record. +-spec find_dynamic_child(IdOrPid, state()) -> {ok, child_rec()} | error when + IdOrPid :: pid() | {restarting,pid()} | child_id(). +find_dynamic_child(Pid, State) -> + case dyn_exists(Pid, State) of + true -> + Child = get_dynamic_child(State), + {ok, Child#child{pid=Pid}}; + false -> + error end. -is_dynamic_pid(Pid, {dict, Dynamics}) -> - ?DICTS:is_key(Pid, Dynamics); -is_dynamic_pid(Pid, {set, Dynamics}) -> - ?SETS:is_element(Pid, Dynamics); -is_dynamic_pid(_Pid, undefined) -> - false. - -replace_child(Child, State) -> - Chs = do_replace_child(Child, State#state.children), - State#state{children = Chs}. - -do_replace_child(Child, [Ch|Chs]) when Ch#child.name =:= Child#child.name -> - [Child | Chs]; -do_replace_child(Child, [Ch|Chs]) -> - [Ch|do_replace_child(Child, Chs)]. +%% Given the pid, find the child record for a non-dyanamic child. +-spec find_child_by_pid(IdOrPid, state()) -> {ok,child_rec()} | error when + IdOrPid :: pid() | {restarting,pid()}. +find_child_by_pid(Pid,#state{children={_Ids,Db}}) -> + Fun = fun(_Id,#child{pid=P}=Ch,_) when P =:= Pid -> + throw(Ch); + (_,_,error) -> + error + end, + try maps:fold(Fun,error,Db) + catch throw:Child -> {ok,Child} + end. -remove_child(Child, State) -> - Chs = lists:keydelete(Child#child.name, #child.name, State#state.children), - State#state{children = Chs}. +%% Get the child record from a simple_one_for_one supervisor - no pid +%% It is assumed that the child can always be found +-spec get_dynamic_child(state()) -> child_rec(). +get_dynamic_child(#state{children={[Id],Db}}) -> + #{Id := Child} = Db, + Child. + +%% Update pid in the given child record and store it in the process state +-spec set_pid(term(), child_id(), state()) -> state(); + (term(), child_id(), children()) -> children(). +set_pid(Pid, Id, #state{children=Children} = State) -> + State#state{children = set_pid(Pid, Id, Children)}; +set_pid(Pid, Id, {Ids, Db}) -> + NewDb = maps:update_with(Id, fun(Child) -> Child#child{pid=Pid} end, Db), + {Ids,NewDb}. + +%% Remove the Id and the child record from the process state +-spec remove_child(child_id(), state()) -> state(). +remove_child(Id, #state{children={Ids,Db}} = State) -> + NewIds = lists:delete(Id,Ids), + NewDb = maps:remove(Id,Db), + State#state{children = {NewIds,NewDb}}. + +%% In the order of Ids, traverse the children and update each child +%% according to the return value of the Fun. +%% On error, abort and return the merge of the old and the updated map. +%% NOTE: The returned list of Ids is reverted compared to the input. +-spec children_map(Fun, children()) -> {ok, children()} | + {error,children(),Reason} when + Fun :: fun((child_id(),child_rec()) -> {update,child_rec()} | + remove | + {abort, Reason}), + Reason :: term(). +children_map(Fun,{Ids,Db}) -> + children_map(Fun, Ids, Db, []). + +children_map(Fun,[Id|Ids],Db,Acc) -> + case Fun(Id,maps:get(Id,Db)) of + {update,Child} -> + children_map(Fun,Ids,Db#{Id => Child},[Id|Acc]); + remove -> + children_map(Fun,Ids,maps:remove(Id,Db),Acc); + {abort,Reason} -> + {error,{lists:reverse(Ids)++[Id|Acc],Db},Reason} + end; +children_map(_Fun,[],Db,Acc) -> + {ok,{Acc,Db}}. + +%% In the order of Ids, map over all children and return the list +-spec children_to_list(Fun, children()) -> List when + Fun :: fun((child_id(), child_rec()) -> Elem), + List :: list(Elem), + Elem :: term(). +children_to_list(Fun,{Ids,Db}) -> + children_to_list(Fun, Ids, Db, []). +children_to_list(Fun,[Id|Ids],Db,Acc) -> + children_to_list(Fun,Ids,Db,[Fun(Id,maps:get(Id,Db))|Acc]); +children_to_list(_Fun,[],_Db,Acc) -> + lists:reverse(Acc). + +%% The order is not important - so ignore Ids +-spec children_fold(Fun, Acc0, children()) -> Acc1 when + Fun :: fun((child_id(), child_rec(), AccIn) -> AccOut), + Acc0 :: term(), + Acc1 :: term(), + AccIn :: term(), + AccOut :: term(). +children_fold(Fun,Init,{_Ids,Db}) -> + maps:fold(Fun, Init, Db). + +-spec append(children(), children()) -> children(). +append({Ids1,Db1},{Ids2,Db2}) -> + {Ids1++Ids2,maps:merge(Db1,Db2)}. %%----------------------------------------------------------------- %% Func: init_state/4 @@ -1290,27 +1244,27 @@ supname(N, _) -> N. %%% Returns: {ok, [child_rec()]} | Error %%% ------------------------------------------------------ -check_startspec(Children) -> check_startspec(Children, []). +check_startspec(Children) -> check_startspec(Children, [], #{}). -check_startspec([ChildSpec|T], Res) -> +check_startspec([ChildSpec|T], Ids, Db) -> case check_childspec(ChildSpec) of - {ok, Child} -> - case lists:keymember(Child#child.name, #child.name, Res) of + {ok, #child{id=Id}=Child} -> + case maps:is_key(Id, Db) of %% The error message duplicate_child_name is kept for %% backwards compatibility, although %% duplicate_child_id would be more correct. - true -> {duplicate_child_name, Child#child.name}; - false -> check_startspec(T, [Child | Res]) + true -> {duplicate_child_name, Id}; + false -> check_startspec(T, [Id | Ids], Db#{Id=>Child}) end; Error -> Error end; -check_startspec([], Res) -> - {ok, lists:reverse(Res)}. +check_startspec([], Ids, Db) -> + {ok, {lists:reverse(Ids),Db}}. check_childspec(ChildSpec) when is_map(ChildSpec) -> catch do_check_childspec(maps:merge(?default_child_spec,ChildSpec)); -check_childspec({Name, Func, RestartType, Shutdown, ChildType, Mods}) -> - check_childspec(#{id => Name, +check_childspec({Id, Func, RestartType, Shutdown, ChildType, Mods}) -> + check_childspec(#{id => Id, start => Func, restart => RestartType, shutdown => Shutdown, @@ -1320,15 +1274,15 @@ check_childspec(X) -> {invalid_child_spec, X}. do_check_childspec(#{restart := RestartType, type := ChildType} = ChildSpec)-> - Name = case ChildSpec of - #{id := N} -> N; + Id = case ChildSpec of + #{id := I} -> I; _ -> throw(missing_id) end, Func = case ChildSpec of #{start := F} -> F; _ -> throw(missing_start) end, - validName(Name), + validId(Id), validFunc(Func), validRestartType(RestartType), validChildType(ChildType), @@ -1343,14 +1297,14 @@ do_check_childspec(#{restart := RestartType, _ -> {M,_,_} = Func, [M] end, validMods(Mods), - {ok, #child{name = Name, mfargs = Func, restart_type = RestartType, + {ok, #child{id = Id, mfargs = Func, restart_type = RestartType, shutdown = Shutdown, child_type = ChildType, modules = Mods}}. validChildType(supervisor) -> true; validChildType(worker) -> true; validChildType(What) -> throw({invalid_child_type, What}). -validName(_Name) -> true. +validId(_Id) -> true. validFunc({M, F, A}) when is_atom(M), is_atom(F), @@ -1379,13 +1333,13 @@ validMods(Mods) when is_list(Mods) -> Mods); validMods(Mods) -> throw({invalid_modules, Mods}). -child_to_spec(#child{name = Name, +child_to_spec(#child{id = Id, mfargs = Func, restart_type = RestartType, shutdown = Shutdown, child_type = ChildType, modules = Mods}) -> - #{id => Name, + #{id => Id, start => Func, restart => RestartType, shutdown => Shutdown, @@ -1439,17 +1393,16 @@ report_error(Error, Reason, Child, SupName) -> {offender, extract_child(Child)}], error_logger:error_report(supervisor_report, ErrorMsg). - extract_child(Child) when is_list(Child#child.pid) -> [{nb_children, length(Child#child.pid)}, - {id, Child#child.name}, + {id, Child#child.id}, {mfargs, Child#child.mfargs}, {restart_type, Child#child.restart_type}, {shutdown, Child#child.shutdown}, {child_type, Child#child.child_type}]; extract_child(Child) -> [{pid, Child#child.pid}, - {id, Child#child.name}, + {id, Child#child.id}, {mfargs, Child#child.mfargs}, {restart_type, Child#child.restart_type}, {shutdown, Child#child.shutdown}, @@ -1465,3 +1418,46 @@ format_status(terminate, [_PDict, State]) -> format_status(_, [_PDict, State]) -> [{data, [{"State", State}]}, {supervisor, [{"Callback", State#state.module}]}]. + +%%%----------------------------------------------------------------- +%%% Dynamics database access +dyn_size(#state{dynamics = {Mod,Db}}) -> + Mod:size(Db). + +dyn_erase(Pid,#state{dynamics={sets,Db}}=State) -> + State#state{dynamics={sets,sets:del_element(Pid,Db)}}; +dyn_erase(Pid,#state{dynamics={maps,Db}}=State) -> + State#state{dynamics={maps,maps:remove(Pid,Db)}}. + +dyn_store(Pid,_,#state{dynamics={sets,Db}}=State) -> + State#state{dynamics={sets,sets:add_element(Pid,Db)}}; +dyn_store(Pid,Args,#state{dynamics={maps,Db}}=State) -> + State#state{dynamics={maps,Db#{Pid => Args}}}. + +dyn_fold(Fun,Init,#state{dynamics={sets,Db}}) -> + sets:fold(Fun,Init,Db); +dyn_fold(Fun,Init,#state{dynamics={maps,Db}}) -> + maps:fold(fun(Pid,_,Acc) -> Fun(Pid,Acc) end, Init, Db). + +dyn_map(Fun, #state{dynamics={sets,Db}}) -> + lists:map(Fun, sets:to_list(Db)); +dyn_map(Fun, #state{dynamics={maps,Db}}) -> + lists:map(Fun, maps:keys(Db)). + +dyn_exists(Pid, #state{dynamics={sets, Db}}) -> + sets:is_element(Pid, Db); +dyn_exists(Pid, #state{dynamics={maps, Db}}) -> + maps:is_key(Pid, Db). + +dyn_args(_Pid, #state{dynamics={sets, _Db}}) -> + {ok,undefined}; +dyn_args(Pid, #state{dynamics={maps, Db}}) -> + maps:find(Pid, Db). + +dyn_init(State) -> + dyn_init(get_dynamic_child(State),State). + +dyn_init(Child,State) when ?is_temporary(Child) -> + State#state{dynamics={sets,sets:new()}}; +dyn_init(_Child,State) -> + State#state{dynamics={maps,maps:new()}}. diff --git a/lib/stdlib/src/uri_string.erl b/lib/stdlib/src/uri_string.erl new file mode 100644 index 0000000000..a84679c595 --- /dev/null +++ b/lib/stdlib/src/uri_string.erl @@ -0,0 +1,2069 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2017. All Rights Reserved. +%% +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at +%% +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. +%% +%% %CopyrightEnd% +%% +%% +%% [RFC 3986, Chapter 2.2. Reserved Characters] +%% +%% reserved = gen-delims / sub-delims +%% +%% gen-delims = ":" / "/" / "?" / "#" / "[" / "]" / "@" +%% +%% sub-delims = "!" / "$" / "&" / "'" / "(" / ")" +%% / "*" / "+" / "," / ";" / "=" +%% +%% +%% [RFC 3986, Chapter 2.3. Unreserved Characters] +%% +%% unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~" +%% +%% +%% [RFC 3986, Chapter 3. Syntax Components] +%% +%% The generic URI syntax consists of a hierarchical sequence of +%% components referred to as the scheme, authority, path, query, and +%% fragment. +%% +%% URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ] +%% +%% hier-part = "//" authority path-abempty +%% / path-absolute +%% / path-rootless +%% / path-empty +%% +%% The scheme and path components are required, though the path may be +%% empty (no characters). When authority is present, the path must +%% either be empty or begin with a slash ("/") character. When +%% authority is not present, the path cannot begin with two slash +%% characters ("//"). These restrictions result in five different ABNF +%% rules for a path (Section 3.3), only one of which will match any +%% given URI reference. +%% +%% The following are two example URIs and their component parts: +%% +%% foo://example.com:8042/over/there?name=ferret#nose +%% \_/ \______________/\_________/ \_________/ \__/ +%% | | | | | +%% scheme authority path query fragment +%% | _____________________|__ +%% / \ / \ +%% urn:example:animal:ferret:nose +%% +%% +%% [RFC 3986, Chapter 3.1. Scheme] +%% +%% Each URI begins with a scheme name that refers to a specification for +%% assigning identifiers within that scheme. +%% +%% scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) +%% +%% +%% [RFC 3986, Chapter 3.2. Authority] +%% +%% Many URI schemes include a hierarchical element for a naming +%% authority so that governance of the name space defined by the +%% remainder of the URI is delegated to that authority (which may, in +%% turn, delegate it further). +%% +%% authority = [ userinfo "@" ] host [ ":" port ] +%% +%% +%% [RFC 3986, Chapter 3.2.1. User Information] +%% +%% The userinfo subcomponent may consist of a user name and, optionally, +%% scheme-specific information about how to gain authorization to access +%% the resource. The user information, if present, is followed by a +%% commercial at-sign ("@") that delimits it from the host. +%% +%% userinfo = *( unreserved / pct-encoded / sub-delims / ":" ) +%% +%% +%% [RFC 3986, Chapter 3.2.2. Host] +%% +%% The host subcomponent of authority is identified by an IP literal +%% encapsulated within square brackets, an IPv4 address in dotted- +%% decimal form, or a registered name. +%% +%% host = IP-literal / IPv4address / reg-name +%% +%% IP-literal = "[" ( IPv6address / IPvFuture ) "]" +%% +%% IPvFuture = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" ) +%% +%% IPv6address = 6( h16 ":" ) ls32 +%% / "::" 5( h16 ":" ) ls32 +%% / [ h16 ] "::" 4( h16 ":" ) ls32 +%% / [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32 +%% / [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32 +%% / [ *3( h16 ":" ) h16 ] "::" h16 ":" ls32 +%% / [ *4( h16 ":" ) h16 ] "::" ls32 +%% / [ *5( h16 ":" ) h16 ] "::" h16 +%% / [ *6( h16 ":" ) h16 ] "::" +%% +%% ls32 = ( h16 ":" h16 ) / IPv4address +%% ; least-significant 32 bits of address +%% +%% h16 = 1*4HEXDIG +%% ; 16 bits of address represented in hexadecimal +%% +%% IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet +%% +%% dec-octet = DIGIT ; 0-9 +%% / %x31-39 DIGIT ; 10-99 +%% / "1" 2DIGIT ; 100-199 +%% / "2" %x30-34 DIGIT ; 200-249 +%% / "25" %x30-35 ; 250-255 +%% +%% reg-name = *( unreserved / pct-encoded / sub-delims ) +%% +%% +%% [RFC 3986, Chapter 3.2.2. Port] +%% +%% The port subcomponent of authority is designated by an optional port +%% number in decimal following the host and delimited from it by a +%% single colon (":") character. +%% +%% port = *DIGIT +%% +%% +%% [RFC 3986, Chapter 3.3. Path] +%% +%% The path component contains data, usually organized in hierarchical +%% form, that, along with data in the non-hierarchical query component +%% (Section 3.4), serves to identify a resource within the scope of the +%% URI's scheme and naming authority (if any). The path is terminated +%% by the first question mark ("?") or number sign ("#") character, or +%% by the end of the URI. +%% +%% path = path-abempty ; begins with "/" or is empty +%% / path-absolute ; begins with "/" but not "//" +%% / path-noscheme ; begins with a non-colon segment +%% / path-rootless ; begins with a segment +%% / path-empty ; zero characters +%% +%% path-abempty = *( "/" segment ) +%% path-absolute = "/" [ segment-nz *( "/" segment ) ] +%% path-noscheme = segment-nz-nc *( "/" segment ) +%% path-rootless = segment-nz *( "/" segment ) +%% path-empty = 0<pchar> +%% segment = *pchar +%% segment-nz = 1*pchar +%% segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" ) +%% ; non-zero-length segment without any colon ":" +%% +%% pchar = unreserved / pct-encoded / sub-delims / ":" / "@" +%% +%% +%% [RFC 3986, Chapter 3.4. Query] +%% +%% The query component contains non-hierarchical data that, along with +%% data in the path component (Section 3.3), serves to identify a +%% resource within the scope of the URI's scheme and naming authority +%% (if any). The query component is indicated by the first question +%% mark ("?") character and terminated by a number sign ("#") character +%% or by the end of the URI. +%% +%% query = *( pchar / "/" / "?" ) +%% +%% +%% [RFC 3986, Chapter 3.5. Fragment] +%% +%% The fragment identifier component of a URI allows indirect +%% identification of a secondary resource by reference to a primary +%% resource and additional identifying information. +%% +%% fragment = *( pchar / "/" / "?" ) +%% +%% +%% [RFC 3986, Chapter 4.1. URI Reference] +%% +%% URI-reference is used to denote the most common usage of a resource +%% identifier. +%% +%% URI-reference = URI / relative-ref +%% +%% +%% [RFC 3986, Chapter 4.2. Relative Reference] +%% +%% A relative reference takes advantage of the hierarchical syntax +%% (Section 1.2.3) to express a URI reference relative to the name space +%% of another hierarchical URI. +%% +%% relative-ref = relative-part [ "?" query ] [ "#" fragment ] +%% +%% relative-part = "//" authority path-abempty +%% / path-absolute +%% / path-noscheme +%% / path-empty +%% +%% +%% [RFC 3986, Chapter 4.3. Absolute URI] +%% +%% Some protocol elements allow only the absolute form of a URI without +%% a fragment identifier. For example, defining a base URI for later +%% use by relative references calls for an absolute-URI syntax rule that +%% does not allow a fragment. +%% +%% absolute-URI = scheme ":" hier-part [ "?" query ] +%% +-module(uri_string). + +%%------------------------------------------------------------------------- +%% External API +%%------------------------------------------------------------------------- +-export([compose_query/1, compose_query/2, + dissect_query/1, normalize/1, parse/1, + recompose/1, transcode/2]). +-export_type([error/0, uri_map/0, uri_string/0]). + + +%%------------------------------------------------------------------------- +%% Internal API +%%------------------------------------------------------------------------- +-export([is_host/1, is_path/1]). % suppress warnings + + +%%------------------------------------------------------------------------- +%% Macros +%%------------------------------------------------------------------------- +-define(CHAR(Char), <<Char/utf8>>). +-define(STRING_EMPTY, <<>>). +-define(STRING(MatchStr), <<MatchStr/binary>>). +-define(STRING_REST(MatchStr, Rest), <<MatchStr/utf8, Rest/binary>>). + +-define(DEC2HEX(X), + if ((X) >= 0) andalso ((X) =< 9) -> (X) + $0; + ((X) >= 10) andalso ((X) =< 15) -> (X) + $A - 10 + end). + +-define(HEX2DEC(X), + if ((X) >= $0) andalso ((X) =< $9) -> (X) - $0; + ((X) >= $A) andalso ((X) =< $F) -> (X) - $A + 10; + ((X) >= $a) andalso ((X) =< $f) -> (X) - $a + 10 + end). + + +%%%========================================================================= +%%% API +%%%========================================================================= + +%%------------------------------------------------------------------------- +%% URI compliant with RFC 3986 +%% ASCII %x21 - %x7A ("!" - "z") except +%% %x34 " double quote +%% %x60 < less than +%% %x62 > greater than +%% %x92 \ backslash +%% %x94 ^ caret / circumflex +%% %x96 ` grave / accent +%%------------------------------------------------------------------------- +-type uri_string() :: iodata(). +-type error() :: {error, atom(), term()}. + + +%%------------------------------------------------------------------------- +%% RFC 3986, Chapter 3. Syntax Components +%%------------------------------------------------------------------------- +-type uri_map() :: + #{fragment => unicode:chardata(), + host => unicode:chardata(), + path => unicode:chardata(), + port => non_neg_integer() | undefined, + query => unicode:chardata(), + scheme => unicode:chardata(), + userinfo => unicode:chardata()} | #{}. + + +%%------------------------------------------------------------------------- +%% Normalize URIs +%%------------------------------------------------------------------------- +-spec normalize(URIString) -> NormalizedURI when + URIString :: uri_string(), + NormalizedURI :: uri_string(). +normalize(URIString) -> + %% Percent-encoding normalization and case normalization for + %% percent-encoded triplets are achieved by running parse and + %% recompose on the input URI string. + recompose( + normalize_path_segment( + normalize_scheme_based( + normalize_case( + parse(URIString))))). + + +%%------------------------------------------------------------------------- +%% Parse URIs +%%------------------------------------------------------------------------- +-spec parse(URIString) -> URIMap when + URIString :: uri_string(), + URIMap :: uri_map() + | error(). +parse(URIString) when is_binary(URIString) -> + try parse_uri_reference(URIString, #{}) + catch + throw:{error, Atom, RestData} -> {error, Atom, RestData} + end; +parse(URIString) when is_list(URIString) -> + try + Binary = unicode:characters_to_binary(URIString), + Map = parse_uri_reference(Binary, #{}), + convert_mapfields_to_list(Map) + catch + throw:{error, Atom, RestData} -> {error, Atom, RestData} + end. + + +%%------------------------------------------------------------------------- +%% Recompose URIs +%%------------------------------------------------------------------------- +-spec recompose(URIMap) -> URIString when + URIMap :: uri_map(), + URIString :: uri_string() + | error(). +recompose(Map) -> + case is_valid_map(Map) of + false -> + {error, invalid_map, Map}; + true -> + try + T0 = update_scheme(Map, empty), + T1 = update_userinfo(Map, T0), + T2 = update_host(Map, T1), + T3 = update_port(Map, T2), + T4 = update_path(Map, T3), + T5 = update_query(Map, T4), + update_fragment(Map, T5) + catch + throw:{error, Atom, RestData} -> {error, Atom, RestData} + end + end. + + +%%------------------------------------------------------------------------- +%% Transcode URIs +%%------------------------------------------------------------------------- +-spec transcode(URIString, Options) -> Result when + URIString :: uri_string(), + Options :: [{in_encoding, unicode:encoding()}|{out_encoding, unicode:encoding()}], + Result :: uri_string() + | error(). +transcode(URIString, Options) when is_binary(URIString) -> + try + InEnc = proplists:get_value(in_encoding, Options, utf8), + OutEnc = proplists:get_value(out_encoding, Options, utf8), + List = convert_to_list(URIString, InEnc), + Output = transcode(List, [], InEnc, OutEnc), + convert_to_binary(Output, utf8, OutEnc) + catch + throw:{error, Atom, RestData} -> {error, Atom, RestData} + end; +transcode(URIString, Options) when is_list(URIString) -> + InEnc = proplists:get_value(in_encoding, Options, utf8), + OutEnc = proplists:get_value(out_encoding, Options, utf8), + Flattened = flatten_list(URIString, InEnc), + try transcode(Flattened, [], InEnc, OutEnc) + catch + throw:{error, Atom, RestData} -> {error, Atom, RestData} + end. + + +%%------------------------------------------------------------------------- +%% Functions for working with the query part of a URI as a list +%% of key/value pairs. +%% HTML5 - 4.10.22.6 URL-encoded form data +%%------------------------------------------------------------------------- + +%%------------------------------------------------------------------------- +%% Compose urlencoded query string from a list of unescaped key/value pairs. +%% (application/x-www-form-urlencoded encoding algorithm) +%%------------------------------------------------------------------------- +-spec compose_query(QueryList) -> QueryString when + QueryList :: [{uri_string(), uri_string()}], + QueryString :: uri_string() + | error(). +compose_query(List) -> + compose_query(List, [{encoding, utf8}]). + + +-spec compose_query(QueryList, Options) -> QueryString when + QueryList :: [{uri_string(), uri_string()}], + Options :: [{encoding, atom()}], + QueryString :: uri_string() + | error(). +compose_query([],_Options) -> + []; +compose_query(List, Options) -> + try compose_query(List, Options, false, <<>>) + catch + throw:{error, Atom, RestData} -> {error, Atom, RestData} + end. +%% +compose_query([{Key,Value}|Rest], Options, IsList, Acc) -> + Separator = get_separator(Rest), + K = form_urlencode(Key, Options), + V = form_urlencode(Value, Options), + IsListNew = IsList orelse is_list(Key) orelse is_list(Value), + compose_query(Rest, Options, IsListNew, <<Acc/binary,K/binary,"=",V/binary,Separator/binary>>); +compose_query([], _Options, IsList, Acc) -> + case IsList of + true -> convert_to_list(Acc, utf8); + false -> Acc + end. + + +%%------------------------------------------------------------------------- +%% Dissect a query string into a list of unescaped key/value pairs. +%% (application/x-www-form-urlencoded decoding algorithm) +%%------------------------------------------------------------------------- +-spec dissect_query(QueryString) -> QueryList when + QueryString :: uri_string(), + QueryList :: [{uri_string(), uri_string()}] + | error(). +dissect_query(<<>>) -> + []; +dissect_query([]) -> + []; +dissect_query(QueryString) when is_list(QueryString) -> + try + B = convert_to_binary(QueryString, utf8, utf8), + dissect_query_key(B, true, [], <<>>, <<>>) + catch + throw:{error, Atom, RestData} -> {error, Atom, RestData} + end; +dissect_query(QueryString) -> + try dissect_query_key(QueryString, false, [], <<>>, <<>>) + catch + throw:{error, Atom, RestData} -> {error, Atom, RestData} + end. + + +%%%======================================================================== +%%% Internal functions +%%%======================================================================== + +%%------------------------------------------------------------------------- +%% Converts Map fields to lists +%%------------------------------------------------------------------------- +convert_mapfields_to_list(Map) -> + Fun = fun (_, V) when is_binary(V) -> unicode:characters_to_list(V); + (_, V) -> V end, + maps:map(Fun, Map). + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 4.1. URI Reference] +%% +%% URI-reference is used to denote the most common usage of a resource +%% identifier. +%% +%% URI-reference = URI / relative-ref +%%------------------------------------------------------------------------- +-spec parse_uri_reference(binary(), uri_map()) -> uri_map(). +parse_uri_reference(<<>>, _) -> #{path => <<>>}; +parse_uri_reference(URIString, URI) -> + try parse_scheme_start(URIString, URI) + catch + throw:{_,_,_} -> + parse_relative_part(URIString, URI) + end. + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 4.2. Relative Reference] +%% +%% A relative reference takes advantage of the hierarchical syntax +%% (Section 1.2.3) to express a URI reference relative to the name space +%% of another hierarchical URI. +%% +%% relative-ref = relative-part [ "?" query ] [ "#" fragment ] +%% +%% relative-part = "//" authority path-abempty +%% / path-absolute +%% / path-noscheme +%% / path-empty +%%------------------------------------------------------------------------- +-spec parse_relative_part(binary(), uri_map()) -> uri_map(). +parse_relative_part(?STRING_REST("//", Rest), URI) -> + %% Parse userinfo - "//" is NOT part of authority + try parse_userinfo(Rest, URI) of + {T, URI1} -> + Userinfo = calculate_parsed_userinfo(Rest, T), + URI2 = maybe_add_path(URI1), + URI2#{userinfo => decode_userinfo(Userinfo)} + catch + throw:{_,_,_} -> + {T, URI1} = parse_host(Rest, URI), + Host = calculate_parsed_host_port(Rest, T), + URI2 = maybe_add_path(URI1), + URI2#{host => decode_host(remove_brackets(Host))} + end; +parse_relative_part(?STRING_REST($/, Rest), URI) -> + {T, URI1} = parse_segment(Rest, URI), % path-absolute + Path = calculate_parsed_part(Rest, T), + URI1#{path => decode_path(?STRING_REST($/, Path))}; +parse_relative_part(?STRING_REST($?, Rest), URI) -> + {T, URI1} = parse_query(Rest, URI), % path-empty ?query + Query = calculate_parsed_query_fragment(Rest, T), + URI2 = maybe_add_path(URI1), + URI2#{query => decode_query(Query)}; +parse_relative_part(?STRING_REST($#, Rest), URI) -> + {T, URI1} = parse_fragment(Rest, URI), % path-empty + Fragment = calculate_parsed_query_fragment(Rest, T), + URI2 = maybe_add_path(URI1), + URI2#{fragment => decode_fragment(Fragment)}; +parse_relative_part(?STRING_REST(Char, Rest), URI) -> + case is_segment_nz_nc(Char) of + true -> + {T, URI1} = parse_segment_nz_nc(Rest, URI), % path-noscheme + Path = calculate_parsed_part(Rest, T), + URI1#{path => decode_path(?STRING_REST(Char, Path))}; + false -> throw({error,invalid_uri,[Char]}) + end. + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 3.3. Path] +%% +%% The path component contains data, usually organized in hierarchical +%% form, that, along with data in the non-hierarchical query component +%% (Section 3.4), serves to identify a resource within the scope of the +%% URI's scheme and naming authority (if any). The path is terminated +%% by the first question mark ("?") or number sign ("#") character, or +%% by the end of the URI. +%% +%% path = path-abempty ; begins with "/" or is empty +%% / path-absolute ; begins with "/" but not "//" +%% / path-noscheme ; begins with a non-colon segment +%% / path-rootless ; begins with a segment +%% / path-empty ; zero characters +%% +%% path-abempty = *( "/" segment ) +%% path-absolute = "/" [ segment-nz *( "/" segment ) ] +%% path-noscheme = segment-nz-nc *( "/" segment ) +%% path-rootless = segment-nz *( "/" segment ) +%% path-empty = 0<pchar> +%% segment = *pchar +%% segment-nz = 1*pchar +%% segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" ) +%% ; non-zero-length segment without any colon ":" +%% +%% pchar = unreserved / pct-encoded / sub-delims / ":" / "@" +%%------------------------------------------------------------------------- + +%%------------------------------------------------------------------------- +%% path-abempty +%%------------------------------------------------------------------------- +-spec parse_segment(binary(), uri_map()) -> {binary(), uri_map()}. +parse_segment(?STRING_REST($/, Rest), URI) -> + parse_segment(Rest, URI); % segment +parse_segment(?STRING_REST($?, Rest), URI) -> + {T, URI1} = parse_query(Rest, URI), % ?query + Query = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{query => decode_query(Query)}}; +parse_segment(?STRING_REST($#, Rest), URI) -> + {T, URI1} = parse_fragment(Rest, URI), + Fragment = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{fragment => decode_fragment(Fragment)}}; +parse_segment(?STRING_REST(Char, Rest), URI) -> + case is_pchar(Char) of + true -> parse_segment(Rest, URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_segment(?STRING_EMPTY, URI) -> + {?STRING_EMPTY, URI}. + + +%%------------------------------------------------------------------------- +%% path-noscheme +%%------------------------------------------------------------------------- +-spec parse_segment_nz_nc(binary(), uri_map()) -> {binary(), uri_map()}. +parse_segment_nz_nc(?STRING_REST($/, Rest), URI) -> + parse_segment(Rest, URI); % segment +parse_segment_nz_nc(?STRING_REST($?, Rest), URI) -> + {T, URI1} = parse_query(Rest, URI), % ?query + Query = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{query => decode_query(Query)}}; +parse_segment_nz_nc(?STRING_REST($#, Rest), URI) -> + {T, URI1} = parse_fragment(Rest, URI), + Fragment = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{fragment => decode_fragment(Fragment)}}; +parse_segment_nz_nc(?STRING_REST(Char, Rest), URI) -> + case is_segment_nz_nc(Char) of + true -> parse_segment_nz_nc(Rest, URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_segment_nz_nc(?STRING_EMPTY, URI) -> + {?STRING_EMPTY, URI}. + + +%% Check if char is pchar. +-spec is_pchar(char()) -> boolean(). +is_pchar($%) -> true; % pct-encoded +is_pchar($:) -> true; +is_pchar($@) -> true; +is_pchar(Char) -> is_unreserved(Char) orelse is_sub_delim(Char). + +%% Check if char is segment_nz_nc. +-spec is_segment_nz_nc(char()) -> boolean(). +is_segment_nz_nc($%) -> true; % pct-encoded +is_segment_nz_nc($@) -> true; +is_segment_nz_nc(Char) -> is_unreserved(Char) orelse is_sub_delim(Char). + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 3.1. Scheme] +%% +%% Each URI begins with a scheme name that refers to a specification for +%% assigning identifiers within that scheme. +%% +%% scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) +%%------------------------------------------------------------------------- +-spec parse_scheme_start(binary(), uri_map()) -> uri_map(). +parse_scheme_start(?STRING_REST(Char, Rest), URI) -> + case is_alpha(Char) of + true -> {T, URI1} = parse_scheme(Rest, URI), + Scheme = calculate_parsed_scheme(Rest, T), + URI2 = maybe_add_path(URI1), + URI2#{scheme => ?STRING_REST(Char, Scheme)}; + false -> throw({error,invalid_uri,[Char]}) + end. + +%% Add path component if it missing after parsing the URI. +%% According to the URI specification there is always a +%% path component in every URI-reference and it can be +%% empty. +maybe_add_path(Map) -> + case maps:is_key(path, Map) of + false -> + Map#{path => <<>>}; + _Else -> + Map + end. + + + +-spec parse_scheme(binary(), uri_map()) -> {binary(), uri_map()}. +parse_scheme(?STRING_REST($:, Rest), URI) -> + {_, URI1} = parse_hier(Rest, URI), + {Rest, URI1}; +parse_scheme(?STRING_REST(Char, Rest), URI) -> + case is_scheme(Char) of + true -> parse_scheme(Rest, URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_scheme(?STRING_EMPTY, _URI) -> + throw({error,invalid_uri,<<>>}). + + +%% Check if char is allowed in scheme +-spec is_scheme(char()) -> boolean(). +is_scheme($+) -> true; +is_scheme($-) -> true; +is_scheme($.) -> true; +is_scheme(Char) -> is_alpha(Char) orelse is_digit(Char). + + +%%------------------------------------------------------------------------- +%% hier-part = "//" authority path-abempty +%% / path-absolute +%% / path-rootless +%% / path-empty +%%------------------------------------------------------------------------- +-spec parse_hier(binary(), uri_map()) -> {binary(), uri_map()}. +parse_hier(?STRING_REST("//", Rest), URI) -> + % Parse userinfo - "//" is NOT part of authority + try parse_userinfo(Rest, URI) of + {T, URI1} -> + Userinfo = calculate_parsed_userinfo(Rest, T), + {Rest, URI1#{userinfo => decode_userinfo(Userinfo)}} + catch + throw:{_,_,_} -> + {T, URI1} = parse_host(Rest, URI), + Host = calculate_parsed_host_port(Rest, T), + {Rest, URI1#{host => decode_host(remove_brackets(Host))}} + end; +parse_hier(?STRING_REST($/, Rest), URI) -> + {T, URI1} = parse_segment(Rest, URI), % path-absolute + Path = calculate_parsed_part(Rest, T), + {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}}; +parse_hier(?STRING_REST($?, Rest), URI) -> + {T, URI1} = parse_query(Rest, URI), % path-empty ?query + Query = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{query => decode_query(Query)}}; +parse_hier(?STRING_REST($#, Rest), URI) -> + {T, URI1} = parse_fragment(Rest, URI), % path-empty + Fragment = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{fragment => decode_fragment(Fragment)}}; +parse_hier(?STRING_REST(Char, Rest), URI) -> % path-rootless + case is_pchar(Char) of + true -> % segment_nz + {T, URI1} = parse_segment(Rest, URI), + Path = calculate_parsed_part(Rest, T), + {Rest, URI1#{path => decode_path(?STRING_REST(Char, Path))}}; + false -> throw({error,invalid_uri,[Char]}) + end; +parse_hier(?STRING_EMPTY, URI) -> + {<<>>, URI}. + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 3.2. Authority] +%% +%% Many URI schemes include a hierarchical element for a naming +%% authority so that governance of the name space defined by the +%% remainder of the URI is delegated to that authority (which may, in +%% turn, delegate it further). +%% +%% The authority component is preceded by a double slash ("//") and is +%% terminated by the next slash ("/"), question mark ("?"), or number +%% sign ("#") character, or by the end of the URI. +%% +%% authority = [ userinfo "@" ] host [ ":" port ] +%% +%% +%% [RFC 3986, Chapter 3.2.1. User Information] +%% +%% The userinfo subcomponent may consist of a user name and, optionally, +%% scheme-specific information about how to gain authorization to access +%% the resource. The user information, if present, is followed by a +%% commercial at-sign ("@") that delimits it from the host. +%% +%% userinfo = *( unreserved / pct-encoded / sub-delims / ":" ) +%%------------------------------------------------------------------------- +-spec parse_userinfo(binary(), uri_map()) -> {binary(), uri_map()}. +parse_userinfo(?CHAR($@), URI) -> + {?STRING_EMPTY, URI#{host => <<>>}}; +parse_userinfo(?STRING_REST($@, Rest), URI) -> + {T, URI1} = parse_host(Rest, URI), + Host = calculate_parsed_host_port(Rest, T), + {Rest, URI1#{host => decode_host(remove_brackets(Host))}}; +parse_userinfo(?STRING_REST(Char, Rest), URI) -> + case is_userinfo(Char) of + true -> parse_userinfo(Rest, URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_userinfo(?STRING_EMPTY, _URI) -> + %% URI cannot end in userinfo state + throw({error,invalid_uri,<<>>}). + + +%% Check if char is allowed in userinfo +-spec is_userinfo(char()) -> boolean(). +is_userinfo($%) -> true; % pct-encoded +is_userinfo($:) -> true; +is_userinfo(Char) -> is_unreserved(Char) orelse is_sub_delim(Char). + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 3.2.2. Host] +%% +%% The host subcomponent of authority is identified by an IP literal +%% encapsulated within square brackets, an IPv4 address in dotted- +%% decimal form, or a registered name. +%% +%% host = IP-literal / IPv4address / reg-name +%% +%% IP-literal = "[" ( IPv6address / IPvFuture ) "]" +%% +%% IPvFuture = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" ) +%% +%% IPv6address = 6( h16 ":" ) ls32 +%% / "::" 5( h16 ":" ) ls32 +%% / [ h16 ] "::" 4( h16 ":" ) ls32 +%% / [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32 +%% / [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32 +%% / [ *3( h16 ":" ) h16 ] "::" h16 ":" ls32 +%% / [ *4( h16 ":" ) h16 ] "::" ls32 +%% / [ *5( h16 ":" ) h16 ] "::" h16 +%% / [ *6( h16 ":" ) h16 ] "::" +%% +%% ls32 = ( h16 ":" h16 ) / IPv4address +%% ; least-significant 32 bits of address +%% +%% h16 = 1*4HEXDIG +%% ; 16 bits of address represented in hexadecimal +%% +%% IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet +%% +%% dec-octet = DIGIT ; 0-9 +%% / %x31-39 DIGIT ; 10-99 +%% / "1" 2DIGIT ; 100-199 +%% / "2" %x30-34 DIGIT ; 200-249 +%% / "25" %x30-35 ; 250-255 +%% +%% reg-name = *( unreserved / pct-encoded / sub-delims ) +%%------------------------------------------------------------------------- +-spec parse_host(binary(), uri_map()) -> {binary(), uri_map()}. +parse_host(?STRING_REST($:, Rest), URI) -> + {T, URI1} = parse_port(Rest, URI), + H = calculate_parsed_host_port(Rest, T), + Port = get_port(H), + {Rest, URI1#{port => Port}}; +parse_host(?STRING_REST($/, Rest), URI) -> + {T, URI1} = parse_segment(Rest, URI), % path-abempty + Path = calculate_parsed_part(Rest, T), + {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}}; +parse_host(?STRING_REST($?, Rest), URI) -> + {T, URI1} = parse_query(Rest, URI), % path-empty ?query + Query = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{query => decode_query(Query)}}; +parse_host(?STRING_REST($[, Rest), URI) -> + parse_ipv6_bin(Rest, [], URI); +parse_host(?STRING_REST($#, Rest), URI) -> + {T, URI1} = parse_fragment(Rest, URI), % path-empty + Fragment = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{fragment => decode_fragment(Fragment)}}; +parse_host(?STRING_REST(Char, Rest), URI) -> + case is_digit(Char) of + true -> parse_ipv4_bin(Rest, [Char], URI); + false -> parse_reg_name(?STRING_REST(Char, Rest), URI) + end; +parse_host(?STRING_EMPTY, URI) -> + {?STRING_EMPTY, URI}. + + +-spec parse_reg_name(binary(), uri_map()) -> {binary(), uri_map()}. +parse_reg_name(?STRING_REST($:, Rest), URI) -> + {T, URI1} = parse_port(Rest, URI), + H = calculate_parsed_host_port(Rest, T), + Port = get_port(H), + {Rest, URI1#{port => Port}}; +parse_reg_name(?STRING_REST($/, Rest), URI) -> + {T, URI1} = parse_segment(Rest, URI), % path-abempty + Path = calculate_parsed_part(Rest, T), + {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}}; +parse_reg_name(?STRING_REST($?, Rest), URI) -> + {T, URI1} = parse_query(Rest, URI), % path-empty ?query + Query = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{query => decode_query(Query)}}; +parse_reg_name(?STRING_REST($#, Rest), URI) -> + {T, URI1} = parse_fragment(Rest, URI), % path-empty + Fragment = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{fragment => decode_fragment(Fragment)}}; +parse_reg_name(?STRING_REST(Char, Rest), URI) -> + case is_reg_name(Char) of + true -> parse_reg_name(Rest, URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_reg_name(?STRING_EMPTY, URI) -> + {?STRING_EMPTY, URI}. + +%% Check if char is allowed in reg-name +-spec is_reg_name(char()) -> boolean(). +is_reg_name($%) -> true; +is_reg_name(Char) -> is_unreserved(Char) orelse is_sub_delim(Char). + + +-spec parse_ipv4_bin(binary(), list(), uri_map()) -> {binary(), uri_map()}. +parse_ipv4_bin(?STRING_REST($:, Rest), Acc, URI) -> + _ = validate_ipv4_address(lists:reverse(Acc)), + {T, URI1} = parse_port(Rest, URI), + H = calculate_parsed_host_port(Rest, T), + Port = get_port(H), + {Rest, URI1#{port => Port}}; +parse_ipv4_bin(?STRING_REST($/, Rest), Acc, URI) -> + _ = validate_ipv4_address(lists:reverse(Acc)), + {T, URI1} = parse_segment(Rest, URI), % path-abempty + Path = calculate_parsed_part(Rest, T), + {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}}; +parse_ipv4_bin(?STRING_REST($?, Rest), Acc, URI) -> + _ = validate_ipv4_address(lists:reverse(Acc)), + {T, URI1} = parse_query(Rest, URI), % path-empty ?query + Query = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{query => decode_query(Query)}}; +parse_ipv4_bin(?STRING_REST($#, Rest), Acc, URI) -> + _ = validate_ipv4_address(lists:reverse(Acc)), + {T, URI1} = parse_fragment(Rest, URI), % path-empty + Fragment = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{fragment => decode_fragment(Fragment)}}; +parse_ipv4_bin(?STRING_REST(Char, Rest), Acc, URI) -> + case is_ipv4(Char) of + true -> parse_ipv4_bin(Rest, [Char|Acc], URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_ipv4_bin(?STRING_EMPTY, Acc, URI) -> + _ = validate_ipv4_address(lists:reverse(Acc)), + {?STRING_EMPTY, URI}. + + +%% Check if char is allowed in IPv4 addresses +-spec is_ipv4(char()) -> boolean(). +is_ipv4($.) -> true; +is_ipv4(Char) -> is_digit(Char). + +-spec validate_ipv4_address(list()) -> list(). +validate_ipv4_address(Addr) -> + case inet:parse_ipv4strict_address(Addr) of + {ok, _} -> Addr; + {error, _} -> throw({error,invalid_uri,Addr}) + end. + + +-spec parse_ipv6_bin(binary(), list(), uri_map()) -> {binary(), uri_map()}. +parse_ipv6_bin(?STRING_REST($], Rest), Acc, URI) -> + _ = validate_ipv6_address(lists:reverse(Acc)), + parse_ipv6_bin_end(Rest, URI); +parse_ipv6_bin(?STRING_REST(Char, Rest), Acc, URI) -> + case is_ipv6(Char) of + true -> parse_ipv6_bin(Rest, [Char|Acc], URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_ipv6_bin(?STRING_EMPTY, _Acc, _URI) -> + throw({error,invalid_uri,<<>>}). + +%% Check if char is allowed in IPv6 addresses +-spec is_ipv6(char()) -> boolean(). +is_ipv6($:) -> true; +is_ipv6($.) -> true; +is_ipv6(Char) -> is_hex_digit(Char). + + +-spec parse_ipv6_bin_end(binary(), uri_map()) -> {binary(), uri_map()}. +parse_ipv6_bin_end(?STRING_REST($:, Rest), URI) -> + {T, URI1} = parse_port(Rest, URI), + H = calculate_parsed_host_port(Rest, T), + Port = get_port(H), + {Rest, URI1#{port => Port}}; +parse_ipv6_bin_end(?STRING_REST($/, Rest), URI) -> + {T, URI1} = parse_segment(Rest, URI), % path-abempty + Path = calculate_parsed_part(Rest, T), + {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}}; +parse_ipv6_bin_end(?STRING_REST($?, Rest), URI) -> + {T, URI1} = parse_query(Rest, URI), % path-empty ?query + Query = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{query => decode_query(Query)}}; +parse_ipv6_bin_end(?STRING_REST($#, Rest), URI) -> + {T, URI1} = parse_fragment(Rest, URI), % path-empty + Fragment = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{fragment => decode_fragment(Fragment)}}; +parse_ipv6_bin_end(?STRING_REST(Char, Rest), URI) -> + case is_ipv6(Char) of + true -> parse_ipv6_bin_end(Rest, URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_ipv6_bin_end(?STRING_EMPTY, URI) -> + {?STRING_EMPTY, URI}. + +-spec validate_ipv6_address(list()) -> list(). +validate_ipv6_address(Addr) -> + case inet:parse_ipv6strict_address(Addr) of + {ok, _} -> Addr; + {error, _} -> throw({error,invalid_uri,Addr}) + end. + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 3.2.2. Port] +%% +%% The port subcomponent of authority is designated by an optional port +%% number in decimal following the host and delimited from it by a +%% single colon (":") character. +%% +%% port = *DIGIT +%%------------------------------------------------------------------------- +-spec parse_port(binary(), uri_map()) -> {binary(), uri_map()}. +parse_port(?STRING_REST($/, Rest), URI) -> + {T, URI1} = parse_segment(Rest, URI), % path-abempty + Path = calculate_parsed_part(Rest, T), + {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}}; +parse_port(?STRING_REST($?, Rest), URI) -> + {T, URI1} = parse_query(Rest, URI), % path-empty ?query + Query = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{query => decode_query(Query)}}; +parse_port(?STRING_REST($#, Rest), URI) -> + {T, URI1} = parse_fragment(Rest, URI), % path-empty + Fragment = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{fragment => decode_fragment(Fragment)}}; +parse_port(?STRING_REST(Char, Rest), URI) -> + case is_digit(Char) of + true -> parse_port(Rest, URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_port(?STRING_EMPTY, URI) -> + {?STRING_EMPTY, URI}. + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 3.4. Query] +%% +%% The query component contains non-hierarchical data that, along with +%% data in the path component (Section 3.3), serves to identify a +%% resource within the scope of the URI's scheme and naming authority +%% (if any). The query component is indicated by the first question +%% mark ("?") character and terminated by a number sign ("#") character +%% or by the end of the URI. +%% +%% query = *( pchar / "/" / "?" ) +%%------------------------------------------------------------------------- +-spec parse_query(binary(), uri_map()) -> {binary(), uri_map()}. +parse_query(?STRING_REST($#, Rest), URI) -> + {T, URI1} = parse_fragment(Rest, URI), + Fragment = calculate_parsed_query_fragment(Rest, T), + {Rest, URI1#{fragment => decode_fragment(Fragment)}}; +parse_query(?STRING_REST(Char, Rest), URI) -> + case is_query(Char) of + true -> parse_query(Rest, URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_query(?STRING_EMPTY, URI) -> + {?STRING_EMPTY, URI}. + + +%% Check if char is allowed in query +-spec is_query(char()) -> boolean(). +is_query($/) -> true; +is_query($?) -> true; +is_query(Char) -> is_pchar(Char). + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 3.5. Fragment] +%% +%% The fragment identifier component of a URI allows indirect +%% identification of a secondary resource by reference to a primary +%% resource and additional identifying information. +%% +%% fragment = *( pchar / "/" / "?" ) +%%------------------------------------------------------------------------- +-spec parse_fragment(binary(), uri_map()) -> {binary(), uri_map()}. +parse_fragment(?STRING_REST(Char, Rest), URI) -> + case is_fragment(Char) of + true -> parse_fragment(Rest, URI); + false -> throw({error,invalid_uri,[Char]}) + end; +parse_fragment(?STRING_EMPTY, URI) -> + {?STRING_EMPTY, URI}. + + +%% Check if char is allowed in fragment +-spec is_fragment(char()) -> boolean(). +is_fragment($/) -> true; +is_fragment($?) -> true; +is_fragment(Char) -> is_pchar(Char). + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 2.2. Reserved Characters] +%% +%% reserved = gen-delims / sub-delims +%% +%% gen-delims = ":" / "/" / "?" / "#" / "[" / "]" / "@" +%% +%% sub-delims = "!" / "$" / "&" / "'" / "(" / ")" +%% / "*" / "+" / "," / ";" / "=" +%% +%%------------------------------------------------------------------------- + +%% Check if char is sub-delim. +-spec is_sub_delim(char()) -> boolean(). +is_sub_delim($!) -> true; +is_sub_delim($$) -> true; +is_sub_delim($&) -> true; +is_sub_delim($') -> true; +is_sub_delim($() -> true; +is_sub_delim($)) -> true; + +is_sub_delim($*) -> true; +is_sub_delim($+) -> true; +is_sub_delim($,) -> true; +is_sub_delim($;) -> true; +is_sub_delim($=) -> true; +is_sub_delim(_) -> false. + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 2.3. Unreserved Characters] +%% +%% unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~" +%% +%%------------------------------------------------------------------------- +-spec is_unreserved(char()) -> boolean(). +is_unreserved($-) -> true; +is_unreserved($.) -> true; +is_unreserved($_) -> true; +is_unreserved($~) -> true; +is_unreserved(Char) -> is_alpha(Char) orelse is_digit(Char). + +-spec is_alpha(char()) -> boolean(). +is_alpha(C) + when $A =< C, C =< $Z; + $a =< C, C =< $z -> true; +is_alpha(_) -> false. + +-spec is_digit(char()) -> boolean(). +is_digit(C) + when $0 =< C, C =< $9 -> true; +is_digit(_) -> false. + +-spec is_hex_digit(char()) -> boolean(). +is_hex_digit(C) + when $0 =< C, C =< $9;$a =< C, C =< $f;$A =< C, C =< $F -> true; +is_hex_digit(_) -> false. + + +%% Remove enclosing brackets from binary +-spec remove_brackets(binary()) -> binary(). +remove_brackets(<<$[/utf8, Rest/binary>>) -> + {H,T} = split_binary(Rest, byte_size(Rest) - 1), + case T =:= <<$]/utf8>> of + true -> H; + false -> Rest + end; +remove_brackets(Addr) -> Addr. + + +%%------------------------------------------------------------------------- +%% Helper functions for calculating the parsed binary. +%%------------------------------------------------------------------------- +-spec calculate_parsed_scheme(binary(), binary()) -> binary(). +calculate_parsed_scheme(Input, <<>>) -> + strip_last_char(Input, [$:]); +calculate_parsed_scheme(Input, Unparsed) -> + get_parsed_binary(Input, Unparsed). + + +-spec calculate_parsed_part(binary(), binary()) -> binary(). +calculate_parsed_part(Input, <<>>) -> + strip_last_char(Input, [$?,$#]); +calculate_parsed_part(Input, Unparsed) -> + get_parsed_binary(Input, Unparsed). + + +-spec calculate_parsed_userinfo(binary(), binary()) -> binary(). +calculate_parsed_userinfo(Input, <<>>) -> + strip_last_char(Input, [$?,$#,$@]); +calculate_parsed_userinfo(Input, Unparsed) -> + get_parsed_binary(Input, Unparsed). + + +-spec calculate_parsed_host_port(binary(), binary()) -> binary(). +calculate_parsed_host_port(Input, <<>>) -> + strip_last_char(Input, [$:,$?,$#,$/]); +calculate_parsed_host_port(Input, Unparsed) -> + get_parsed_binary(Input, Unparsed). + + +calculate_parsed_query_fragment(Input, <<>>) -> + strip_last_char(Input, [$#]); +calculate_parsed_query_fragment(Input, Unparsed) -> + get_parsed_binary(Input, Unparsed). + + +get_port(<<>>) -> + undefined; +get_port(B) -> + try binary_to_integer(B) + catch + error:badarg -> + throw({error, invalid_uri, B}) + end. + + +%% Strip last char if it is in list +%% +%% This function is optimized for speed: parse/1 is about 10% faster than +%% with an alternative implementation based on lists and sets. +strip_last_char(<<>>, _) -> <<>>; +strip_last_char(Input, [C0]) -> + case binary:last(Input) of + C0 -> + init_binary(Input); + _Else -> + Input + end; +strip_last_char(Input, [C0,C1]) -> + case binary:last(Input) of + C0 -> + init_binary(Input); + C1 -> + init_binary(Input); + _Else -> + Input + end; +strip_last_char(Input, [C0,C1,C2]) -> + case binary:last(Input) of + C0 -> + init_binary(Input); + C1 -> + init_binary(Input); + C2 -> + init_binary(Input); + _Else -> + Input + end; +strip_last_char(Input, [C0,C1,C2,C3]) -> + case binary:last(Input) of + C0 -> + init_binary(Input); + C1 -> + init_binary(Input); + C2 -> + init_binary(Input); + C3 -> + init_binary(Input); + _Else -> + Input + end. + + +%% Get parsed binary +get_parsed_binary(Input, Unparsed) -> + {First, _} = split_binary(Input, byte_size(Input) - byte_size_exl_head(Unparsed)), + First. + + +%% Return all bytes of the binary except the last one. The binary must be non-empty. +init_binary(B) -> + {Init, _} = + split_binary(B, byte_size(B) - 1), + Init. + + +%% Returns the size of a binary exluding the first element. +%% Used in calls to split_binary(). +-spec byte_size_exl_head(binary()) -> number(). +byte_size_exl_head(<<>>) -> 0; +byte_size_exl_head(Binary) -> byte_size(Binary) + 1. + + +%%------------------------------------------------------------------------- +%% [RFC 3986, Chapter 2.1. Percent-Encoding] +%% +%% A percent-encoding mechanism is used to represent a data octet in a +%% component when that octet's corresponding character is outside the +%% allowed set or is being used as a delimiter of, or within, the +%% component. A percent-encoded octet is encoded as a character +%% triplet, consisting of the percent character "%" followed by the two +%% hexadecimal digits representing that octet's numeric value. For +%% example, "%20" is the percent-encoding for the binary octet +%% "00100000" (ABNF: %x20), which in US-ASCII corresponds to the space +%% character (SP). Section 2.4 describes when percent-encoding and +%% decoding is applied. +%% +%% pct-encoded = "%" HEXDIG HEXDIG +%%------------------------------------------------------------------------- +-spec decode_userinfo(binary()) -> binary(). +decode_userinfo(Cs) -> + check_utf8(decode(Cs, fun is_userinfo/1, <<>>)). + +-spec decode_host(binary()) -> binary(). +decode_host(Cs) -> + check_utf8(decode(Cs, fun is_host/1, <<>>)). + +-spec decode_path(binary()) -> binary(). +decode_path(Cs) -> + check_utf8(decode(Cs, fun is_path/1, <<>>)). + +-spec decode_query(binary()) -> binary(). +decode_query(Cs) -> + check_utf8(decode(Cs, fun is_query/1, <<>>)). + +-spec decode_fragment(binary()) -> binary(). +decode_fragment(Cs) -> + check_utf8(decode(Cs, fun is_fragment/1, <<>>)). + + +%% Returns Cs if it is utf8 encoded. +check_utf8(Cs) -> + case unicode:characters_to_list(Cs) of + {incomplete,_,_} -> + throw({error,invalid_utf8,Cs}); + {error,_,_} -> + throw({error,invalid_utf8,Cs}); + _ -> Cs + end. + +%%------------------------------------------------------------------------- +%% Percent-encode +%%------------------------------------------------------------------------- + +%% Only validates as scheme cannot have percent-encoded characters +-spec encode_scheme(list()|binary()) -> list() | binary(). +encode_scheme([]) -> + throw({error,invalid_scheme,""}); +encode_scheme(<<>>) -> + throw({error,invalid_scheme,<<>>}); +encode_scheme(Scheme) -> + case validate_scheme(Scheme) of + true -> Scheme; + false -> throw({error,invalid_scheme,Scheme}) + end. + +-spec encode_userinfo(list()|binary()) -> list() | binary(). +encode_userinfo(Cs) -> + encode(Cs, fun is_userinfo/1). + +-spec encode_host(list()|binary()) -> list() | binary(). +encode_host(Cs) -> + case classify_host(Cs) of + regname -> Cs; + ipv4 -> Cs; + ipv6 -> bracket_ipv6(Cs); + other -> encode(Cs, fun is_reg_name/1) + end. + +-spec encode_path(list()|binary()) -> list() | binary(). +encode_path(Cs) -> + encode(Cs, fun is_path/1). + +-spec encode_query(list()|binary()) -> list() | binary(). +encode_query(Cs) -> + encode(Cs, fun is_query/1). + +-spec encode_fragment(list()|binary()) -> list() | binary(). +encode_fragment(Cs) -> + encode(Cs, fun is_fragment/1). + +%%------------------------------------------------------------------------- +%% Helper funtions for percent-decode +%%------------------------------------------------------------------------- +decode(<<$%,C0,C1,Cs/binary>>, Fun, Acc) -> + case is_hex_digit(C0) andalso is_hex_digit(C1) of + true -> + B = ?HEX2DEC(C0)*16+?HEX2DEC(C1), + decode(Cs, Fun, <<Acc/binary, B>>); + false -> throw({error,invalid_percent_encoding,<<$%,C0,C1>>}) + end; +decode(<<C,Cs/binary>>, Fun, Acc) -> + case Fun(C) of + true -> decode(Cs, Fun, <<Acc/binary, C>>); + false -> throw({error,invalid_percent_encoding,<<C,Cs/binary>>}) + end; +decode(<<>>, _Fun, Acc) -> + Acc. + +%% Check if char is allowed in host +-spec is_host(char()) -> boolean(). +is_host($:) -> true; +is_host(Char) -> is_unreserved(Char) orelse is_sub_delim(Char). + +%% Check if char is allowed in path +-spec is_path(char()) -> boolean(). +is_path($/) -> true; +is_path(Char) -> is_pchar(Char). + + +%%------------------------------------------------------------------------- +%% Helper functions for percent-encode +%%------------------------------------------------------------------------- +-spec encode(list()|binary(), fun()) -> list() | binary(). +encode(Component, Fun) when is_list(Component) -> + B = unicode:characters_to_binary(Component), + unicode:characters_to_list(encode(B, Fun, <<>>)); +encode(Component, Fun) when is_binary(Component) -> + encode(Component, Fun, <<>>). +%% +encode(<<Char/utf8, Rest/binary>>, Fun, Acc) -> + C = encode_codepoint_binary(Char, Fun), + encode(Rest, Fun, <<Acc/binary,C/binary>>); +encode(<<Char, Rest/binary>>, _Fun, _Acc) -> + throw({error,invalid_input,<<Char,Rest/binary>>}); +encode(<<>>, _Fun, Acc) -> + Acc. + + +-spec encode_codepoint_binary(integer(), fun()) -> binary(). +encode_codepoint_binary(C, Fun) -> + case Fun(C) of + false -> percent_encode_binary(C); + true -> <<C>> + end. + + +-spec percent_encode_binary(integer()) -> binary(). +percent_encode_binary(Code) -> + percent_encode_binary(<<Code/utf8>>, <<>>). + + +percent_encode_binary(<<A:4,B:4,Rest/binary>>, Acc) -> + percent_encode_binary(Rest, <<Acc/binary,$%,(?DEC2HEX(A)),(?DEC2HEX(B))>>); +percent_encode_binary(<<>>, Acc) -> + Acc. + + +%%------------------------------------------------------------------------- +%%------------------------------------------------------------------------- +validate_scheme([]) -> true; +validate_scheme([H|T]) -> + case is_scheme(H) of + true -> validate_scheme(T); + false -> false + end; +validate_scheme(<<>>) -> true; +validate_scheme(<<H, Rest/binary>>) -> + case is_scheme(H) of + true -> validate_scheme(Rest); + false -> false + end. + + +%%------------------------------------------------------------------------- +%% Classifies hostname into the following categories: +%% regname, ipv4 - address does not contain reserved characters to be +%% percent-encoded +%% ipv6 - address does not contain reserved characters but it shall be +%% encolsed in brackets +%% other - address shall be percent-encoded +%%------------------------------------------------------------------------- +classify_host([]) -> other; +classify_host(Addr) when is_binary(Addr) -> + A = unicode:characters_to_list(Addr), + classify_host_ipv6(A); +classify_host(Addr) -> + classify_host_ipv6(Addr). + +classify_host_ipv6(Addr) -> + case is_ipv6_address(Addr) of + true -> ipv6; + false -> classify_host_ipv4(Addr) + end. + +classify_host_ipv4(Addr) -> + case is_ipv4_address(Addr) of + true -> ipv4; + false -> classify_host_regname(Addr) + end. + +classify_host_regname([]) -> regname; +classify_host_regname([H|T]) -> + case is_reg_name(H) of + true -> classify_host_regname(T); + false -> other + end. + +is_ipv4_address(Addr) -> + case inet:parse_ipv4strict_address(Addr) of + {ok, _} -> true; + {error, _} -> false + end. + +is_ipv6_address(Addr) -> + case inet:parse_ipv6strict_address(Addr) of + {ok, _} -> true; + {error, _} -> false + end. + +bracket_ipv6(Addr) when is_binary(Addr) -> + concat(<<$[,Addr/binary>>,<<$]>>); +bracket_ipv6(Addr) when is_list(Addr) -> + [$[|Addr] ++ "]". + + +%%------------------------------------------------------------------------- +%% Helper funtions for recompose +%%------------------------------------------------------------------------- + +%%------------------------------------------------------------------------- +%% Checks if input Map has valid combination of fields that can be +%% recomposed into a URI. +%% +%% The implementation is based on a decision tree that fulfills the +%% following rules: +%% - 'path' shall always be present in the input map +%% URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ] +%% hier-part = "//" authority path-abempty +%% / path-absolute +%% / path-rootless +%% / path-empty +%% - 'host' shall be present in the input map when 'path' starts with +%% two slashes ("//") +%% path = path-abempty ; begins with "/" or is empty +%% / path-absolute ; begins with "/" but not "//" +%% / path-noscheme ; begins with a non-colon segment +%% / path-rootless ; begins with a segment +%% / path-empty ; zero characters +%% path-abempty = *( "/" segment ) +%% segment = *pchar +%% - 'host' shall be present if userinfo or port is present in input map +%% authority = [ userinfo "@" ] host [ ":" port ] +%% - All fields shall be valid (scheme, userinfo, host, port, path, query +%% or fragment). +%%------------------------------------------------------------------------- +is_valid_map(#{path := Path} = Map) -> + ((starts_with_two_slash(Path) andalso is_valid_map_host(Map)) + orelse + (maps:is_key(userinfo, Map) andalso is_valid_map_host(Map)) + orelse + (maps:is_key(port, Map) andalso is_valid_map_host(Map)) + orelse + all_fields_valid(Map)); +is_valid_map(#{}) -> + false. + + +is_valid_map_host(Map) -> + maps:is_key(host, Map) andalso all_fields_valid(Map). + + +all_fields_valid(Map) -> + Fun = fun(scheme, _, Acc) -> Acc; + (userinfo, _, Acc) -> Acc; + (host, _, Acc) -> Acc; + (port, _, Acc) -> Acc; + (path, _, Acc) -> Acc; + (query, _, Acc) -> Acc; + (fragment, _, Acc) -> Acc; + (_, _, _) -> false + end, + maps:fold(Fun, true, Map). + + +starts_with_two_slash([$/,$/|_]) -> + true; +starts_with_two_slash(?STRING_REST("//", _)) -> + true; +starts_with_two_slash(_) -> false. + + +update_scheme(#{scheme := Scheme}, _) -> + add_colon_postfix(encode_scheme(Scheme)); +update_scheme(#{}, _) -> + empty. + + +update_userinfo(#{userinfo := Userinfo}, empty) -> + add_auth_prefix(encode_userinfo(Userinfo)); +update_userinfo(#{userinfo := Userinfo}, URI) -> + concat(URI,add_auth_prefix(encode_userinfo(Userinfo))); +update_userinfo(#{}, empty) -> + empty; +update_userinfo(#{}, URI) -> + URI. + + +update_host(#{host := Host}, empty) -> + add_auth_prefix(encode_host(Host)); +update_host(#{host := Host} = Map, URI) -> + concat(URI,add_host_prefix(Map, encode_host(Host))); +update_host(#{}, empty) -> + empty; +update_host(#{}, URI) -> + URI. + + +%% URI cannot be empty for ports. E.g. ":8080" is not a valid URI +update_port(#{port := undefined}, URI) -> + concat(URI, <<":">>); +update_port(#{port := Port}, URI) -> + concat(URI,add_colon(encode_port(Port))); +update_port(#{}, URI) -> + URI. + + +update_path(#{path := Path}, empty) -> + encode_path(Path); +update_path(#{path := Path}, URI) -> + concat(URI,encode_path(Path)); +update_path(#{}, empty) -> + empty; +update_path(#{}, URI) -> + URI. + + +update_query(#{query := Query}, empty) -> + encode_query(Query); +update_query(#{query := Query}, URI) -> + concat(URI,add_question_mark(encode_query(Query))); +update_query(#{}, empty) -> + empty; +update_query(#{}, URI) -> + URI. + + +update_fragment(#{fragment := Fragment}, empty) -> + add_hashmark(encode_fragment(Fragment)); +update_fragment(#{fragment := Fragment}, URI) -> + concat(URI,add_hashmark(encode_fragment(Fragment))); +update_fragment(#{}, empty) -> + ""; +update_fragment(#{}, URI) -> + URI. + +%%------------------------------------------------------------------------- +%% Concatenates its arguments that can be lists and binaries. +%% The result is a list if at least one of its argument is a list and +%% binary otherwise. +%%------------------------------------------------------------------------- +concat(A, B) when is_binary(A), is_binary(B) -> + <<A/binary, B/binary>>; +concat(A, B) when is_binary(A), is_list(B) -> + unicode:characters_to_list(A) ++ B; +concat(A, B) when is_list(A) -> + A ++ maybe_to_list(B). + +add_hashmark(Comp) when is_binary(Comp) -> + <<$#, Comp/binary>>; +add_hashmark(Comp) when is_list(Comp) -> + [$#|Comp]. + +add_question_mark(Comp) when is_binary(Comp) -> + <<$?, Comp/binary>>; +add_question_mark(Comp) when is_list(Comp) -> + [$?|Comp]. + +add_colon(Comp) when is_binary(Comp) -> + <<$:, Comp/binary>>. + +add_colon_postfix(Comp) when is_binary(Comp) -> + <<Comp/binary,$:>>; +add_colon_postfix(Comp) when is_list(Comp) -> + Comp ++ ":". + +add_auth_prefix(Comp) when is_binary(Comp) -> + <<"//", Comp/binary>>; +add_auth_prefix(Comp) when is_list(Comp) -> + [$/,$/|Comp]. + +add_host_prefix(#{userinfo := _}, Host) when is_binary(Host) -> + <<$@,Host/binary>>; +add_host_prefix(#{}, Host) when is_binary(Host) -> + <<"//",Host/binary>>; +add_host_prefix(#{userinfo := _}, Host) when is_list(Host) -> + [$@|Host]; +add_host_prefix(#{}, Host) when is_list(Host) -> + [$/,$/|Host]. + +maybe_to_list(Comp) when is_binary(Comp) -> unicode:characters_to_list(Comp); +maybe_to_list(Comp) -> Comp. + +encode_port(Port) -> + integer_to_binary(Port). + +%%------------------------------------------------------------------------- +%% Helper functions for transcode +%%------------------------------------------------------------------------- + +%%------------------------------------------------------------------------- +%% uri_string:transcode(<<"x%00%00%00%F6"/utf32>>). +%% 1. Convert (transcode/2) input to list form (list of unicode codepoints) +%% "x%00%00%00%F6" +%% 2. Accumulate characters until percent-encoded segment (transcode/4). +%% Acc = "x" +%% 3. Convert percent-encoded triplets to binary form (transcode_pct/4) +%% <<0,0,0,246>> +%% 4. Transcode in-encoded binary to out-encoding (utf32 -> utf8): +%% <<195,182>> +%% 5. Percent-encode out-encoded binary: +%% <<"%C3%B6"/utf8>> = <<37,67,51,37,66,54>> +%% 6. Convert binary to list form, reverse it and append the accumulator +%% "6B%3C%" + "x" +%% 7. Reverse Acc and return it +%%------------------------------------------------------------------------- +transcode([$%,_C0,_C1|_Rest] = L, Acc, InEnc, OutEnc) -> + transcode_pct(L, Acc, <<>>, InEnc, OutEnc); +transcode([_C|_Rest] = L, Acc, InEnc, OutEnc) -> + transcode(L, Acc, [], InEnc, OutEnc). +%% +transcode([$%,_C0,_C1|_Rest] = L, Acc, List, InEncoding, OutEncoding) -> + transcode_pct(L, List ++ Acc, <<>>, InEncoding, OutEncoding); +transcode([C|Rest], Acc, List, InEncoding, OutEncoding) -> + transcode(Rest, Acc, [C|List], InEncoding, OutEncoding); +transcode([], Acc, List, _InEncoding, _OutEncoding) -> + lists:reverse(List ++ Acc). + + +%% Transcode percent-encoded segment +transcode_pct([$%,C0,C1|Rest] = L, Acc, B, InEncoding, OutEncoding) -> + case is_hex_digit(C0) andalso is_hex_digit(C1) of + true -> + Int = ?HEX2DEC(C0)*16+?HEX2DEC(C1), + transcode_pct(Rest, Acc, <<B/binary, Int>>, InEncoding, OutEncoding); + false -> throw({error, invalid_percent_encoding,L}) + end; +transcode_pct([_C|_Rest] = L, Acc, B, InEncoding, OutEncoding) -> + OutBinary = convert_to_binary(B, InEncoding, OutEncoding), + PctEncUtf8 = percent_encode_segment(OutBinary), + Out = lists:reverse(convert_to_list(PctEncUtf8, utf8)), + transcode(L, Out ++ Acc, [], InEncoding, OutEncoding); +transcode_pct([], Acc, B, InEncoding, OutEncoding) -> + OutBinary = convert_to_binary(B, InEncoding, OutEncoding), + PctEncUtf8 = percent_encode_segment(OutBinary), + Out = convert_to_list(PctEncUtf8, utf8), + lists:reverse(Acc) ++ Out. + + +%% Convert to binary +convert_to_binary(Binary, InEncoding, OutEncoding) -> + case unicode:characters_to_binary(Binary, InEncoding, OutEncoding) of + {error, _List, RestData} -> + throw({error, invalid_input, RestData}); + {incomplete, _List, RestData} -> + throw({error, invalid_input, RestData}); + Result -> + Result + end. + + +%% Convert to list +convert_to_list(Binary, InEncoding) -> + case unicode:characters_to_list(Binary, InEncoding) of + {error, _List, RestData} -> + throw({error, invalid_input, RestData}); + {incomplete, _List, RestData} -> + throw({error, invalid_input, RestData}); + Result -> + Result + end. + + +%% Flatten input list +flatten_list([], _) -> + []; +flatten_list(L, InEnc) -> + flatten_list(L, InEnc, []). +%% +flatten_list([H|T], InEnc, Acc) when is_binary(H) -> + L = convert_to_list(H, InEnc), + flatten_list(T, InEnc, lists:reverse(L) ++ Acc); +flatten_list([H|T], InEnc, Acc) when is_list(H) -> + flatten_list(H ++ T, InEnc, Acc); +flatten_list([H|T], InEnc, Acc) -> + flatten_list(T, InEnc, [H|Acc]); +flatten_list([], _InEnc, Acc) -> + lists:reverse(Acc); +flatten_list(Arg, _, _) -> + throw({error, invalid_input, Arg}). + + +percent_encode_segment(Segment) -> + percent_encode_binary(Segment, <<>>). + + +%%------------------------------------------------------------------------- +%% Helper functions for compose_query +%%------------------------------------------------------------------------- + +%% Returns separator to be used between key-value pairs +get_separator(L) when length(L) =:= 0 -> + <<>>; +get_separator(_L) -> + <<"&">>. + + +%% HTML5 - 4.10.22.6 URL-encoded form data - encoding +form_urlencode(Cs, [{encoding, latin1}]) when is_list(Cs) -> + B = convert_to_binary(Cs, utf8, utf8), + html5_byte_encode(base10_encode(B)); +form_urlencode(Cs, [{encoding, latin1}]) when is_binary(Cs) -> + html5_byte_encode(base10_encode(Cs)); +form_urlencode(Cs, [{encoding, Encoding}]) + when is_list(Cs), Encoding =:= utf8; Encoding =:= unicode -> + B = convert_to_binary(Cs, utf8, Encoding), + html5_byte_encode(B); +form_urlencode(Cs, [{encoding, Encoding}]) + when is_binary(Cs), Encoding =:= utf8; Encoding =:= unicode -> + html5_byte_encode(Cs); +form_urlencode(Cs, [{encoding, Encoding}]) when is_list(Cs); is_binary(Cs) -> + throw({error,invalid_encoding, Encoding}); +form_urlencode(Cs, _) -> + throw({error,invalid_input, Cs}). + + +%% For each character in the entry's name and value that cannot be expressed using +%% the selected character encoding, replace the character by a string consisting of +%% a U+0026 AMPERSAND character (&), a "#" (U+0023) character, one or more ASCII +%% digits representing the Unicode code point of the character in base ten, and +%% finally a ";" (U+003B) character. +base10_encode(Cs) -> + base10_encode(Cs, <<>>). +%% +base10_encode(<<>>, Acc) -> + Acc; +base10_encode(<<H/utf8,T/binary>>, Acc) when H > 255 -> + Base10 = convert_to_binary(integer_to_list(H,10), utf8, utf8), + base10_encode(T, <<Acc/binary,"&#",Base10/binary,$;>>); +base10_encode(<<H/utf8,T/binary>>, Acc) -> + base10_encode(T, <<Acc/binary,H>>). + + +html5_byte_encode(B) -> + html5_byte_encode(B, <<>>). +%% +html5_byte_encode(<<>>, Acc) -> + Acc; +html5_byte_encode(<<$ ,T/binary>>, Acc) -> + html5_byte_encode(T, <<Acc/binary,$+>>); +html5_byte_encode(<<H,T/binary>>, Acc) -> + case is_url_char(H) of + true -> + html5_byte_encode(T, <<Acc/binary,H>>); + false -> + <<A:4,B:4>> = <<H>>, + html5_byte_encode(T, <<Acc/binary,$%,(?DEC2HEX(A)),(?DEC2HEX(B))>>) + end; +html5_byte_encode(H, _Acc) -> + throw({error,invalid_input, H}). + + +%% Return true if input char can appear in form-urlencoded string +%% Allowed chararacters: +%% 0x2A, 0x2D, 0x2E, 0x30 to 0x39, 0x41 to 0x5A, +%% 0x5F, 0x61 to 0x7A +is_url_char(C) + when C =:= 16#2A; C =:= 16#2D; + C =:= 16#2E; C =:= 16#5F; + 16#30 =< C, C =< 16#39; + 16#41 =< C, C =< 16#5A; + 16#61 =< C, C =< 16#7A -> true; +is_url_char(_) -> false. + + +%%------------------------------------------------------------------------- +%% Helper functions for dissect_query +%%------------------------------------------------------------------------- +dissect_query_key(<<$=,T/binary>>, IsList, Acc, Key, Value) -> + dissect_query_value(T, IsList, Acc, Key, Value); +dissect_query_key(<<"&#",T/binary>>, IsList, Acc, Key, Value) -> + dissect_query_key(T, IsList, Acc, <<Key/binary,"&#">>, Value); +dissect_query_key(<<$&,_T/binary>>, _IsList, _Acc, _Key, _Value) -> + throw({error, missing_value, "&"}); +dissect_query_key(<<H,T/binary>>, IsList, Acc, Key, Value) -> + dissect_query_key(T, IsList, Acc, <<Key/binary,H>>, Value); +dissect_query_key(B, _, _, _, _) -> + throw({error, missing_value, B}). + + +dissect_query_value(<<$&,T/binary>>, IsList, Acc, Key, Value) -> + K = form_urldecode(IsList, Key), + V = form_urldecode(IsList, Value), + dissect_query_key(T, IsList, [{K,V}|Acc], <<>>, <<>>); +dissect_query_value(<<H,T/binary>>, IsList, Acc, Key, Value) -> + dissect_query_value(T, IsList, Acc, Key, <<Value/binary,H>>); +dissect_query_value(<<>>, IsList, Acc, Key, Value) -> + K = form_urldecode(IsList, Key), + V = form_urldecode(IsList, Value), + lists:reverse([{K,V}|Acc]). + + +%% Form-urldecode input based on RFC 1866 [8.2.1] +form_urldecode(true, B) -> + Result = base10_decode(form_urldecode(B, <<>>)), + convert_to_list(Result, utf8); +form_urldecode(false, B) -> + base10_decode(form_urldecode(B, <<>>)); +form_urldecode(<<>>, Acc) -> + Acc; +form_urldecode(<<$+,T/binary>>, Acc) -> + form_urldecode(T, <<Acc/binary,$ >>); +form_urldecode(<<$%,C0,C1,T/binary>>, Acc) -> + case is_hex_digit(C0) andalso is_hex_digit(C1) of + true -> + V = ?HEX2DEC(C0)*16+?HEX2DEC(C1), + form_urldecode(T, <<Acc/binary, V>>); + false -> + L = convert_to_list(<<$%,C0,C1,T/binary>>, utf8), + throw({error, invalid_percent_encoding, L}) + end; +form_urldecode(<<H/utf8,T/binary>>, Acc) -> + form_urldecode(T, <<Acc/binary,H/utf8>>); +form_urldecode(<<H,_/binary>>, _Acc) -> + throw({error, invalid_character, [H]}). + +base10_decode(Cs) -> + base10_decode(Cs, <<>>). +% +base10_decode(<<>>, Acc) -> + Acc; +base10_decode(<<"&#",T/binary>>, Acc) -> + base10_decode_unicode(T, Acc); +base10_decode(<<H/utf8,T/binary>>, Acc) -> + base10_decode(T,<<Acc/binary,H/utf8>>); +base10_decode(<<H,_/binary>>, _) -> + throw({error, invalid_input, [H]}). + + +base10_decode_unicode(B, Acc) -> + base10_decode_unicode(B, 0, Acc). +%% +base10_decode_unicode(<<H/utf8,T/binary>>, Codepoint, Acc) when $0 =< H, H =< $9 -> + Res = Codepoint * 10 + (H - $0), + base10_decode_unicode(T, Res, Acc); +base10_decode_unicode(<<$;,T/binary>>, Codepoint, Acc) -> + base10_decode(T, <<Acc/binary,Codepoint/utf8>>); +base10_decode_unicode(<<H,_/binary>>, _, _) -> + throw({error, invalid_input, [H]}). + + +%%------------------------------------------------------------------------- +%% Helper functions for normalize +%%------------------------------------------------------------------------- + +%% 6.2.2.1. Case Normalization +normalize_case(#{scheme := Scheme, host := Host} = Map) -> + Map#{scheme => to_lower(Scheme), + host => to_lower(Host)}; +normalize_case(#{host := Host} = Map) -> + Map#{host => to_lower(Host)}; +normalize_case(#{scheme := Scheme} = Map) -> + Map#{scheme => to_lower(Scheme)}; +normalize_case(#{} = Map) -> + Map. + + +to_lower(Cs) when is_list(Cs) -> + B = convert_to_binary(Cs, utf8, utf8), + convert_to_list(to_lower(B), utf8); +to_lower(Cs) when is_binary(Cs) -> + to_lower(Cs, <<>>). +%% +to_lower(<<C,Cs/binary>>, Acc) when $A =< C, C =< $Z -> + to_lower(Cs, <<Acc/binary,(C + 32)>>); +to_lower(<<C,Cs/binary>>, Acc) -> + to_lower(Cs, <<Acc/binary,C>>); +to_lower(<<>>, Acc) -> + Acc. + + +%% 6.2.2.3. Path Segment Normalization +%% 5.2.4. Remove Dot Segments +normalize_path_segment(Map) -> + Path = maps:get(path, Map, undefined), + Map#{path => remove_dot_segments(Path)}. + + +remove_dot_segments(Path) when is_binary(Path) -> + remove_dot_segments(Path, <<>>); +remove_dot_segments(Path) when is_list(Path) -> + B = convert_to_binary(Path, utf8, utf8), + B1 = remove_dot_segments(B, <<>>), + convert_to_list(B1, utf8). +%% +remove_dot_segments(<<>>, Output) -> + Output; +remove_dot_segments(<<"../",T/binary>>, Output) -> + remove_dot_segments(T, Output); +remove_dot_segments(<<"./",T/binary>>, Output) -> + remove_dot_segments(T, Output); +remove_dot_segments(<<"/./",T/binary>>, Output) -> + remove_dot_segments(<<$/,T/binary>>, Output); +remove_dot_segments(<<"/.">>, Output) -> + remove_dot_segments(<<$/>>, Output); +remove_dot_segments(<<"/../",T/binary>>, Output) -> + Out1 = remove_last_segment(Output), + remove_dot_segments(<<$/,T/binary>>, Out1); +remove_dot_segments(<<"/..">>, Output) -> + Out1 = remove_last_segment(Output), + remove_dot_segments(<<$/>>, Out1); +remove_dot_segments(<<$.>>, Output) -> + remove_dot_segments(<<>>, Output); +remove_dot_segments(<<"..">>, Output) -> + remove_dot_segments(<<>>, Output); +remove_dot_segments(Input, Output) -> + {First, Rest} = first_path_segment(Input), + remove_dot_segments(Rest, <<Output/binary,First/binary>>). + + +first_path_segment(Input) -> + F = first_path_segment(Input, <<>>), + split_binary(Input, byte_size(F)). +%% +first_path_segment(<<$/,T/binary>>, Acc) -> + first_path_segment_end(<<T/binary>>, <<Acc/binary,$/>>); +first_path_segment(<<C,T/binary>>, Acc) -> + first_path_segment_end(<<T/binary>>, <<Acc/binary,C>>). + + +first_path_segment_end(<<>>, Acc) -> + Acc; +first_path_segment_end(<<$/,_/binary>>, Acc) -> + Acc; +first_path_segment_end(<<C,T/binary>>, Acc) -> + first_path_segment_end(<<T/binary>>, <<Acc/binary,C>>). + + +remove_last_segment(<<>>) -> + <<>>; +remove_last_segment(B) -> + {Init, Last} = split_binary(B, byte_size(B) - 1), + case Last of + <<$/>> -> + Init; + _Char -> + remove_last_segment(Init) + end. + + +%% RFC 3986, 6.2.3. Scheme-Based Normalization +normalize_scheme_based(Map) -> + Scheme = maps:get(scheme, Map, undefined), + Port = maps:get(port, Map, undefined), + Path= maps:get(path, Map, undefined), + normalize_scheme_based(Map, Scheme, Port, Path). +%% +normalize_scheme_based(Map, Scheme, Port, Path) + when Scheme =:= "http"; Scheme =:= <<"http">> -> + normalize_http(Map, Port, Path); +normalize_scheme_based(Map, Scheme, Port, Path) + when Scheme =:= "https"; Scheme =:= <<"https">> -> + normalize_https(Map, Port, Path); +normalize_scheme_based(Map, Scheme, Port, _Path) + when Scheme =:= "ftp"; Scheme =:= <<"ftp">> -> + normalize_ftp(Map, Port); +normalize_scheme_based(Map, Scheme, Port, _Path) + when Scheme =:= "ssh"; Scheme =:= <<"ssh">> -> + normalize_ssh_sftp(Map, Port); +normalize_scheme_based(Map, Scheme, Port, _Path) + when Scheme =:= "sftp"; Scheme =:= <<"sftp">> -> + normalize_ssh_sftp(Map, Port); +normalize_scheme_based(Map, Scheme, Port, _Path) + when Scheme =:= "tftp"; Scheme =:= <<"tftp">> -> + normalize_tftp(Map, Port); +normalize_scheme_based(Map, _, _, _) -> + Map. + + +normalize_http(Map, Port, Path) -> + M1 = normalize_port(Map, Port, 80), + normalize_http_path(M1, Path). + + +normalize_https(Map, Port, Path) -> + M1 = normalize_port(Map, Port, 443), + normalize_http_path(M1, Path). + + +normalize_ftp(Map, Port) -> + normalize_port(Map, Port, 21). + + +normalize_ssh_sftp(Map, Port) -> + normalize_port(Map, Port, 22). + + +normalize_tftp(Map, Port) -> + normalize_port(Map, Port, 69). + + +normalize_port(Map, Port, Default) -> + case Port of + Default -> + maps:remove(port, Map); + _Else -> + Map + end. + + +normalize_http_path(Map, Path) -> + case Path of + "" -> + Map#{path => "/"}; + <<>> -> + Map#{path => <<"/">>}; + _Else -> + Map + end. |