From f28539265d753bbaa473cb488e951bfe47304a01 Mon Sep 17 00:00:00 2001
From: Rickard Green <rickard@erlang.org>
Date: Thu, 12 Oct 2017 16:28:31 +0200
Subject: Revert "Merge branch 'rickard/null-char-filenames/ERL-370/OTP-14543'
 into maint"

This reverts commit 0717a2194e863f3a78595184ccc5637697f03353, reversing
changes made to 71a40658a0cef8b3e25df3a8e48a72d0563a89bf.
---
 lib/stdlib/src/filename.erl | 70 ---------------------------------------------
 1 file changed, 70 deletions(-)

(limited to 'lib/stdlib/src/filename.erl')

diff --git a/lib/stdlib/src/filename.erl b/lib/stdlib/src/filename.erl
index 1c3ab6d274..9bf4290916 100644
--- a/lib/stdlib/src/filename.erl
+++ b/lib/stdlib/src/filename.erl
@@ -41,7 +41,6 @@
          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]).
@@ -1136,72 +1135,3 @@ 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).
-- 
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