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|
#############################################################################
##
## This file is part of GAP, a system for computational discrete algebra.
##
## Copyright of GAP belongs to its developers, whose names are too numerous
## to list here. Please refer to the COPYRIGHT file for details.
##
## SPDX-License-Identifier: GPL-2.0-or-later
##
## Custom streams for HPC-GAP
##
#############################################################################
##
#F # # # # # # # # # # # # # input text custom # # # # # # # # # # # # # # #
##
#############################################################################
##
#V InputTextCustomType
##
InputTextCustomType := NewType(
StreamsFamily,
IsInputTextStream and IsInputTextCustomRep );
#############################################################################
##
#M InputTextCustom( <state>, <read>, <close> )
##
InstallGlobalFunction( InputTextCustom,
function(state, read, close)
return Objectify( InputTextCustomType,
rec(
state := state,
read := read,
close := close,
pos := 0,
endofinput := false,
buffer := ""
) );
end);
#############################################################################
##
#M CloseStream( <input-text-custom> )
##
InstallMethod( CloseStream,
"input text custom",
[ IsInputTextStream and IsInputTextCustomRep ],
function( stream )
if not stream!.close(stream!.state) then
TryNextMethod();
fi;
end );
#############################################################################
##
#M IsEndOfStream( <input-text-custom> )
##
InstallMethod( IsEndOfStream,
"input text custom",
[ IsInputTextStream and IsInputTextCustomRep ],
function( stream )
return stream!.endofinput and Length(stream!.buffer) = 0;
end );
#############################################################################
##
#M PositionStream( <input-text-custom> )
##
InstallMethod( PositionStream,
"input text custom",
[ IsInputTextStream and IsInputTextCustomRep ],
function(stream)
return stream!.pos;
end);
#############################################################################
##
#M PrintObj( <input-text-custom> )
##
InstallMethod( PrintObj,
"input text custom",
[ IsInputTextCustomRep ],
function( obj )
Print( "InputTextCustom( ... )" );
end );
#############################################################################
##
#M ReadAll( <input-text-custom> )
##
InstallMethod( ReadAll,
"input text custom",
[ IsInputTextStream and IsInputTextCustomRep ],
function( stream )
local chunk;
stream!.endofinput := false;
while not stream!.endofinput do
chunk := stream!.read(stream!.state);
if chunk = "" then
stream!.endofinput := true;
else
Append(stream!.buffer, chunk);
fi;
od;
chunk := stream!.buffer;
stream!.pos := stream!.pos + Length(chunk);
stream!.buffer := "";
return Immutable(chunk);
end );
InstallMethod( ReadAll,
"input text custom and limit",
[ IsInputTextStream and IsInputTextCustomRep, IsInt ],
function( stream, limit )
local chunk;;
if limit < 0 then
Error("ReadAll: negative limit is not allowed");
fi;
stream!.endofinput := false;
while not stream!.endofinput and Length(stream!.buffer) < limit do
chunk := stream!.read(stream!.state);
Append(stream!.buffer, chunk);
if chunk = "" then
stream!.endofinput := true;
fi;
od;
chunk := stream!.buffer{[1..Minimum(limit, Length(stream!.buffer))]};
stream!.pos := stream!.pos + Length(chunk);
stream!.buffer := stream!.buffer{[Length(chunk)+1..Length(stream!.buffer)]};
return Immutable(chunk);
end );
#############################################################################
##
#M ReadByte( <input-text-custom> )
##
InstallMethod( ReadByte,
"input text custom",
[ IsInputTextStream and IsInputTextCustomRep ],
function( stream )
if stream!.buffer = "" then
stream!.buffer := stream!.read(stream!.state);
if stream!.buffer = "" then
stream!.endofinput := true;
return fail;
fi;
fi;
stream!.pos := stream!.pos + 1;
return INT_CHAR(Remove(stream!.buffer, 1));
end );
#############################################################################
##
#M ReadLine( <input-text-custom> )
##
InstallMethod( ReadLine,
"input text custom",
[ IsInputTextStream and IsInputTextCustomRep ],
function ( stream )
local pos, chunk;
pos := Position(stream!.buffer, '\n');
stream!.endofinput := false;
while pos = fail and not stream!.endofinput do
chunk := stream!.read(stream!.state);
if chunk = "" then
stream!.endofinput := true;
else
Append(stream!.buffer, chunk);
pos := Position(stream!.buffer, '\n');
fi;
od;
if stream!.buffer = "" then
return fail;
fi;
if pos = fail then
pos := Length(stream!.buffer);
fi;
chunk := stream!.buffer{[1..pos]};
stream!.buffer := stream!.buffer{[pos+1..Length(stream!.buffer)]};
stream!.pos := stream!.pos+pos+1;
return chunk;
end );
#############################################################################
##
#M RewindStream( <input-text-custom> )
##
InstallMethod( RewindStream,
"input text custom",
[ IsInputTextStream and IsInputTextCustomRep ],
ReturnFail );
#############################################################################
##
#M SeekPositionStream( <input-text-custom> )
##
InstallMethod( SeekPositionStream,
"input text custom",
[ IsInputTextStream and IsInputTextCustomRep,
IsInt ],
ReturnFail );
#############################################################################
##
#F # # # # # # # # # # # # output text custom # # # # # # # # # # # # # # #
##
#############################################################################
##
#R IsOutputTextCustomRep
##
DeclareRepresentation(
"IsOutputTextCustomRep",
IsComponentObjectRep,
["state", "write", "close", "buffer", "formatting"] );
#############################################################################
##
#V OutputTextCustomType
##
OutputTextCustomType := NewType(
StreamsFamily,
IsOutputTextStream and IsOutputTextCustomRep );
#############################################################################
##
#M OutputTextCustom( <state>, <write>, <close> )
##
InstallGlobalFunction( OutputTextCustom,
function( state, write, close )
return Objectify( OutputTextCustomType, rec (
state := state,
write := write,
close := close,
buffer := "",
formatting := false,
) );
end );
#############################################################################
##
#M CloseStream( <output-text-custom> )
##
InstallMethod( CloseStream,
"output text custom",
[ IsOutputTextStream and IsOutputTextCustomRep ],
function( stream )
if not stream!.close(stream!.state) then
TryNextMethod();
fi;
end );
#############################################################################
##
#M PrintObj( <output-text-custom> )
##
InstallMethod( PrintObj,
"output text custom",
[ IsOutputTextCustomRep ],
function( obj )
Print( "OutputTextCustom( ... )" );
end );
#############################################################################
##
#M WriteAll( <output-text-custom>, <custom> )
##
InstallMethod( WriteAll,
"output text custom",
[ IsOutputTextStream and IsOutputTextCustomRep,
IsString ],
function( stream, string )
Append( stream!.buffer, string );
stream!.write(stream!.state, stream!.buffer);
stream!.buffer := "";
return true;
end );
#############################################################################
##
#M WriteByte( <output-text-custom>, <byte> )
##
InstallMethod( WriteByte,
"output text custom",
[ IsOutputTextStream and IsOutputTextCustomRep,
IsInt ],
function( stream, byte )
if byte < 0 or 255 < byte then
Error( "<byte> must an integer between 0 and 255" );
fi;
if byte = 3 then
if stream!.buffer <> "" then
stream!.write(stream!.state, stream!.buffer);
stream!.buffer := "";
fi;
else
Add( stream!.buffer, CHAR_INT(byte) );
if byte = 10 then
stream!.write(stream!.state, stream!.buffer);
stream!.buffer := "";
fi;
fi;
return true;
end );
#############################################################################
##
#M PrintFormattingStatus( <output-text-custom> )
##
InstallMethod( PrintFormattingStatus, "output text custom",
[IsOutputTextCustomRep and IsOutputTextStream],
str -> str!.formatting);
#############################################################################
##
#M SetPrintFormattingStatus( <output-text-custom>, <status> )
##
InstallMethod( SetPrintFormattingStatus, "output text custom",
[IsOutputTextCustomRep and IsOutputTextStream,
IsBool],
function( str, stat)
if stat = fail then
Error("Print formatting status must be true or false");
else
str!.formatting := stat;
fi;
end);
|
