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StreamDisciplines
This commit is contained in:
Norayr Chilingarian
parent
26711501d0
commit
ab6cd805d5
2 changed files with 250 additions and 4 deletions
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@ -31,7 +31,7 @@
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MODULE ulmIndirectDisciplines;
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MODULE ulmIndirectDisciplines;
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IMPORT Disciplines := ulmDisciplines, Forwarders := ulmForwarders;
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IMPORT Disciplines := ulmDisciplines, Forwarders := ulmForwarders, SYSTEM;
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TYPE
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TYPE
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Object* = Disciplines.Object;
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Object* = Disciplines.Object;
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@ -72,7 +72,7 @@ MODULE ulmIndirectDisciplines;
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VAR
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VAR
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disc: IndDiscipline;
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disc: IndDiscipline;
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BEGIN
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BEGIN
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WHILE Disciplines.Seek(object, discID, disc) DO
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WHILE Disciplines.Seek(object, discID, SYSTEM.VAL(Disciplines.Discipline, disc)) DO
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object := disc.forwardTo;
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object := disc.forwardTo;
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END;
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END;
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Disciplines.Add(object, discipline);
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Disciplines.Add(object, discipline);
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@ -88,7 +88,7 @@ MODULE ulmIndirectDisciplines;
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Disciplines.Remove(object, id);
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Disciplines.Remove(object, id);
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EXIT
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EXIT
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END;
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END;
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IF ~Disciplines.Seek(object, discID, disc) THEN
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IF ~Disciplines.Seek(object, discID, SYSTEM.VAL(Disciplines.Discipline, disc)) THEN
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EXIT
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EXIT
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END;
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END;
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object := disc.forwardTo;
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object := disc.forwardTo;
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@ -104,7 +104,7 @@ MODULE ulmIndirectDisciplines;
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IF Disciplines.Seek(object, id, discipline) THEN
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IF Disciplines.Seek(object, id, discipline) THEN
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RETURN TRUE
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RETURN TRUE
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END;
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END;
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IF ~Disciplines.Seek(object, discID, disc) THEN
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IF ~Disciplines.Seek(object, discID, SYSTEM.VAL(Disciplines.Discipline, disc)) THEN
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RETURN FALSE
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RETURN FALSE
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END;
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END;
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object := disc.forwardTo;
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object := disc.forwardTo;
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246
src/lib/ulm/ulmStreamDisciplines.Mod
Normal file
246
src/lib/ulm/ulmStreamDisciplines.Mod
Normal file
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@ -0,0 +1,246 @@
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(* Ulm's Oberon Library
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Copyright (C) 1989-1994 by University of Ulm, SAI, D-89069 Ulm, Germany
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----------------------------------------------------------------------------
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Ulm's Oberon Library is free software; you can redistribute it
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and/or modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either version
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2 of the License, or (at your option) any later version.
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Ulm's Oberon Library is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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----------------------------------------------------------------------------
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E-mail contact: oberon@mathematik.uni-ulm.de
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----------------------------------------------------------------------------
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$Id: StreamDisci.om,v 1.2 1994/07/04 14:53:25 borchert Exp $
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----------------------------------------------------------------------------
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$Log: StreamDisci.om,v $
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Revision 1.2 1994/07/04 14:53:25 borchert
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parameter for indentation width added
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Revision 1.1 1994/02/22 20:10:34 borchert
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Initial revision
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----------------------------------------------------------------------------
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AFB 10/91
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----------------------------------------------------------------------------
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*)
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MODULE StreamDisciplines;
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(* definition of general-purpose disciplines for streams *)
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IMPORT ASCII, Disciplines := IndirectDisciplines, Events, Sets, Streams;
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TYPE
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LineTerminator* = ARRAY 4 OF CHAR;
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VAR
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badfieldsepset*: Events.EventType;
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TYPE
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StreamDiscipline = POINTER TO StreamDisciplineRec;
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StreamDisciplineRec =
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RECORD
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(Disciplines.DisciplineRec)
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lineterm: LineTerminator;
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fieldseps: Sets.CharSet;
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fieldsep: CHAR; (* one of them *)
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whitespace: Sets.CharSet;
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indentwidth: INTEGER;
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END;
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VAR
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id: Disciplines.Identifier;
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(* default values *)
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defaultFieldSeps: Sets.CharSet;
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defaultFieldSep: CHAR;
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defaultLineTerm: LineTerminator;
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defaultWhiteSpace: Sets.CharSet;
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defaultIndentWidth: INTEGER;
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PROCEDURE InitDiscipline(VAR disc: StreamDiscipline);
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BEGIN
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NEW(disc); disc.id := id;
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disc.fieldseps := defaultFieldSeps;
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disc.fieldsep := defaultFieldSep;
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disc.lineterm := defaultLineTerm;
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disc.whitespace := defaultWhiteSpace;
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disc.indentwidth := defaultIndentWidth;
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END InitDiscipline;
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PROCEDURE SetLineTerm*(s: Streams.Stream; lineterm: LineTerminator);
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF ~Disciplines.Seek(s, id, disc) THEN
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InitDiscipline(disc);
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END;
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disc.lineterm := lineterm;
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Disciplines.Add(s, disc);
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END SetLineTerm;
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PROCEDURE GetLineTerm*(s: Streams.Stream; VAR lineterm: LineTerminator);
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(* default line terminator is ASCII.nl *)
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF Disciplines.Seek(s, id, disc) THEN
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lineterm := disc.lineterm;
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ELSE
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lineterm := defaultLineTerm;
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END;
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END GetLineTerm;
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PROCEDURE SetFieldSepSet*(s: Streams.Stream; fieldsepset: Sets.CharSet);
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(* cardinality of fieldsepset must be >= 1 *)
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VAR
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disc: StreamDiscipline;
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ch: CHAR; found: BOOLEAN;
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fieldsep: CHAR;
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event: Events.Event;
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BEGIN
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ch := 0X;
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LOOP (* seek for the first element inside fieldsepset *)
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IF Sets.CharIn(fieldsepset, ch) THEN
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found := TRUE; fieldsep := ch; EXIT
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END;
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IF ch = MAX(CHAR) THEN
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found := FALSE; EXIT
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END;
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ch := CHR(ORD(ch) + 1);
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END;
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IF ~found THEN
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NEW(event);
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event.message := "StreamDisciplines.SetFieldSepSet: empty fieldsepset";
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event.type := badfieldsepset;
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Events.Raise(event);
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RETURN
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END;
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IF ~Disciplines.Seek(s, id, disc) THEN
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InitDiscipline(disc);
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END;
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disc.fieldseps := fieldsepset;
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disc.fieldsep := fieldsep;
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Disciplines.Add(s, disc);
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END SetFieldSepSet;
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PROCEDURE GetFieldSepSet*(s: Streams.Stream; VAR fieldsepset: Sets.CharSet);
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(* default field separators are ASCII.tab and ASCII.sp *)
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF Disciplines.Seek(s, id, disc) THEN
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fieldsepset := disc.fieldseps;
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ELSE
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fieldsepset := defaultFieldSeps;
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END;
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END GetFieldSepSet;
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PROCEDURE SetFieldSep*(s: Streams.Stream; fieldsep: CHAR);
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF ~Disciplines.Seek(s, id, disc) THEN
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InitDiscipline(disc);
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END;
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Sets.InclChar(disc.fieldseps, fieldsep);
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disc.fieldsep := fieldsep;
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Disciplines.Add(s, disc);
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END SetFieldSep;
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PROCEDURE GetFieldSep*(s: Streams.Stream; VAR fieldsep: CHAR);
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(* default field separator is ASCII.tab;
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if a set of field separators has been given via SetFieldSepSet,
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one of them is returned
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*)
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF Disciplines.Seek(s, id, disc) THEN
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fieldsep := disc.fieldsep;
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ELSE
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fieldsep := defaultFieldSep;
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END;
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END GetFieldSep;
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PROCEDURE GetWhiteSpace*(s: Streams.Stream; VAR whitespace: Sets.CharSet);
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(* default: ASCII.tab, ASCII.sp, ASCII.np and ASCII.nl *)
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF Disciplines.Seek(s, id, disc) THEN
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whitespace := disc.whitespace;
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ELSE
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whitespace := defaultWhiteSpace;
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END;
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END GetWhiteSpace;
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PROCEDURE SetWhiteSpace*(s: Streams.Stream; whitespace: Sets.CharSet);
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF ~Disciplines.Seek(s, id, disc) THEN
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InitDiscipline(disc);
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END;
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disc.whitespace := whitespace;
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Disciplines.Add(s, disc);
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END SetWhiteSpace;
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PROCEDURE SetIndentationWidth*(s: Streams.Stream; indentwidth: INTEGER);
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF indentwidth >= 0 THEN
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IF ~Disciplines.Seek(s, id, disc) THEN
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InitDiscipline(disc);
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END;
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disc.indentwidth := indentwidth;
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Disciplines.Add(s, disc);
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END;
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END SetIndentationWidth;
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PROCEDURE GetIndentationWidth*(s: Streams.Stream; VAR indentwidth: INTEGER);
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF Disciplines.Seek(s, id, disc) THEN
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indentwidth := disc.indentwidth;
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ELSE
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indentwidth := defaultIndentWidth;
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END;
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END GetIndentationWidth;
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PROCEDURE IncrIndentationWidth*(s: Streams.Stream; incr: INTEGER);
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VAR
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disc: StreamDiscipline;
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BEGIN
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IF ~Disciplines.Seek(s, id, disc) THEN
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InitDiscipline(disc);
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END;
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IF disc.indentwidth + incr >= 0 THEN
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INC(disc.indentwidth, incr);;
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END;
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Disciplines.Add(s, disc);
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END IncrIndentationWidth;
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BEGIN
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Events.Define(badfieldsepset);
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id := Disciplines.Unique();
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Sets.InitSet(defaultFieldSeps);
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Sets.InclChar(defaultFieldSeps, ASCII.tab);
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Sets.InclChar(defaultFieldSeps, ASCII.sp);
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defaultFieldSep := ASCII.tab;
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defaultLineTerm[0] := ASCII.nl; defaultLineTerm[1] := 0X;
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Sets.InitSet(defaultWhiteSpace);
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Sets.InclChar(defaultWhiteSpace, ASCII.tab);
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Sets.InclChar(defaultWhiteSpace, ASCII.sp);
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Sets.InclChar(defaultWhiteSpace, ASCII.np);
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Sets.InclChar(defaultWhiteSpace, ASCII.nl);
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defaultIndentWidth := 0;
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END StreamDisciplines.
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