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-rw-r--r--lib/kernel/src/file_io_server.erl145
1 files changed, 66 insertions, 79 deletions
diff --git a/lib/kernel/src/file_io_server.erl b/lib/kernel/src/file_io_server.erl
index 0bcb1a658b..bf8b9e2747 100644
--- a/lib/kernel/src/file_io_server.erl
+++ b/lib/kernel/src/file_io_server.erl
@@ -3,16 +3,17 @@
%%
%% Copyright Ericsson AB 2000-2013. All Rights Reserved.
%%
-%% The contents of this file are subject to the Erlang Public License,
-%% Version 1.1, (the "License"); you may not use this file except in
-%% compliance with the License. You should have received a copy of the
-%% Erlang Public License along with this software. If not, it can be
-%% retrieved online at http://www.erlang.org/.
+%% 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
%%
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and limitations
-%% under the License.
+%% 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%
%%
@@ -162,29 +163,29 @@ server_loop(#state{mref = Mref} = State) ->
{file_request, From, ReplyAs, Request} when is_pid(From) ->
case file_request(Request, State) of
{reply, Reply, NewState} ->
- file_reply(From, ReplyAs, Reply),
+ _ = file_reply(From, ReplyAs, Reply),
server_loop(NewState);
{error, Reply, NewState} ->
%% error is the same as reply, except that
%% it breaks the io_request_loop further down
- file_reply(From, ReplyAs, Reply),
+ _ = file_reply(From, ReplyAs, Reply),
server_loop(NewState);
{stop, Reason, Reply, _NewState} ->
- file_reply(From, ReplyAs, Reply),
+ _ = file_reply(From, ReplyAs, Reply),
exit(Reason)
end;
{io_request, From, ReplyAs, Request} when is_pid(From) ->
case io_request(Request, State) of
{reply, Reply, NewState} ->
- io_reply(From, ReplyAs, Reply),
+ _ = io_reply(From, ReplyAs, Reply),
server_loop(NewState);
{error, Reply, NewState} ->
%% error is the same as reply, except that
%% it breaks the io_request_loop further down
- io_reply(From, ReplyAs, Reply),
+ _ = io_reply(From, ReplyAs, Reply),
server_loop(NewState);
{stop, Reason, Reply, _NewState} ->
- io_reply(From, ReplyAs, Reply),
+ _ = io_reply(From, ReplyAs, Reply),
exit(Reason)
end;
{'DOWN', Mref, _, _, Reason} ->
@@ -307,18 +308,18 @@ io_request({get_chars,Enc,_Prompt,N},
#state{}=State) ->
get_chars(N, Enc, State);
-%%
-%% This optimization gives almost nothing - needs more working...
-%% Disabled for now. /PaN
-%%
-%% io_request({get_line,Enc,_Prompt},
-%% #state{unic=latin1}=State) ->
-%% get_line(Enc,State);
-
-io_request({get_line,Enc,_Prompt},
- #state{}=State) ->
- get_chars(io_lib, collect_line, [], Enc, State);
-
+io_request({get_line,OutEnc,_Prompt}, #state{buf=Buf, read_mode=Mode, unic=InEnc} = State0) ->
+ try
+ %% Minimize the encoding conversions
+ WorkEnc = case InEnc of
+ {_,_} -> OutEnc; %% utf16 or utf32
+ _ -> InEnc %% Byte oriented utf8 or latin1
+ end,
+ {Res, State} = get_line(start, convert_enc(Buf, InEnc, WorkEnc), WorkEnc, State0),
+ {reply, cast(Res, Mode, WorkEnc, OutEnc), State}
+ catch exit:ExError ->
+ {stop,ExError,{error,ExError},State0#state{buf= <<>>}}
+ end;
io_request({setopts, Opts},
#state{}=State) when is_list(Opts) ->
@@ -386,56 +387,40 @@ put_chars(Chars, InEncoding, #state{handle=Handle, unic=OutEncoding}=State) ->
{stop,normal,{error,{no_translation, InEncoding, OutEncoding}},State}
end.
-%%
-%% Process the I/O request get_line for latin1 encoding of file specially
-%% Unfortunately this function gives almost nothing, it needs more work
-%% I disable it for now /PaN
-%%
-%% srch(<<>>,_,_) ->
-%% nomatch;
-%% srch(<<X:8,_/binary>>,X,N) ->
-%% {match,N};
-%% srch(<<_:8,T/binary>>,X,N) ->
-%% srch(T,X,N+1).
-%% get_line(OutEnc, #state{handle=Handle,buf = <<>>,unic=latin1}=State) ->
-%% case ?PRIM_FILE:read(Handle,?READ_SIZE_BINARY) of
-%% {ok, B} ->
-%% get_line(OutEnc, State#state{buf = B});
-%% eof ->
-%% {reply,eof,State};
-%% {error,Reason}=Error ->
-%% {stop,Reason,Error,State}
-%% end;
-%% get_line(OutEnc, #state{handle=Handle,buf=Buf,read_mode=ReadMode,unic=latin1}=State) ->
-%% case srch(Buf,$\n,0) of
-%% nomatch ->
-%% case ?PRIM_FILE:read(Handle,?READ_SIZE_BINARY) of
-%% {ok, B} ->
-%% get_line(OutEnc,State#state{buf = <<Buf/binary,B/binary>>});
-%% eof ->
-%% std_reply(cast(Buf, ReadMode,latin1,OutEnc), State);
-%% {error,Reason}=Error ->
-%% {stop,Reason,Error,State#state{buf= <<>>}}
-%% end;
-%% {match,Pos} when Pos >= 1->
-%% PosP1 = Pos + 1,
-%% <<Res0:PosP1/binary,NewBuf/binary>> = Buf,
-%% PosM1 = Pos - 1,
-%% Res = case Res0 of
-%% <<Chomped:PosM1/binary,$\r:8,$\n:8>> ->
-%% cat(Chomped, <<"\n">>, ReadMode,latin1,OutEnc);
-%% _Other ->
-%% cast(Res0, ReadMode,latin1,OutEnc)
-%% end,
-%% {reply,Res,State#state{buf=NewBuf}};
-%% {match,Pos} ->
-%% PosP1 = Pos + 1,
-%% <<Res:PosP1/binary,NewBuf/binary>> = Buf,
-%% {reply,Res,State#state{buf=NewBuf}}
-%% end;
-%% get_line(_, #state{}=State) ->
-%% {error,{error,get_line},State}.
-
+get_line(S, {<<>>, Cont}, OutEnc,
+ #state{handle=Handle, read_mode=Mode, unic=InEnc}=State) ->
+ case ?PRIM_FILE:read(Handle, read_size(Mode)) of
+ {ok,Bin} ->
+ get_line(S, convert_enc([Cont, Bin], InEnc, OutEnc), OutEnc, State);
+ eof ->
+ get_line(S, {eof, Cont}, OutEnc, State);
+ {error,Reason}=Error ->
+ {stop,Reason,Error,State}
+ end;
+get_line(S0, {Buf, BCont}, OutEnc, #state{unic=InEnc}=State) ->
+ case io_lib:collect_line(S0, Buf, OutEnc, []) of
+ {stop, Result, Cont0} ->
+ %% Convert both buffers back to file InEnc encoding
+ {Cont, <<>>} = convert_enc(Cont0, OutEnc, InEnc),
+ {Result, State#state{buf=cast_binary([Cont, BCont])}};
+ S ->
+ get_line(S, {<<>>, BCont}, OutEnc, State)
+ end.
+
+convert_enc(Bins, Enc, Enc) ->
+ {cast_binary(Bins), <<>>};
+convert_enc(eof, _, _) ->
+ {<<>>, <<>>};
+convert_enc(Bin, InEnc, OutEnc) ->
+ case unicode:characters_to_binary(Bin, InEnc, OutEnc) of
+ Res when is_binary(Res) ->
+ {Res, <<>>};
+ {incomplete, Res, Cont} ->
+ {Res, Cont};
+ {error, _, _} ->
+ exit({no_translation, InEnc, OutEnc})
+ end.
+
%%
%% Process the I/O request get_chars
%%
@@ -640,8 +625,6 @@ invalid_unicode_error(Mod, Func, XtraArg, S) ->
%% Convert error code to make it look as before
err_func(io_lib, get_until, {_,F,_}) ->
- F;
-err_func(_, F, _) ->
F.
@@ -713,6 +696,8 @@ cat(B1, B2, list, latin1,_) ->
binary_to_list(B1)++binary_to_list(B2).
%% Cast binary to list or binary
+cast(eof, _, _, _) ->
+ eof;
cast(B, binary, latin1, latin1) ->
B;
cast(B, binary, InEncoding, OutEncoding) ->
@@ -736,6 +721,8 @@ cast(B, list, InEncoding, OutEncoding) ->
%% Convert buffer to binary
cast_binary(Binary) when is_binary(Binary) ->
Binary;
+cast_binary([<<>>|List]) ->
+ cast_binary(List);
cast_binary(List) when is_list(List) ->
list_to_binary(List);
cast_binary(_EOF) ->
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 13:52:34 +0000