(*
Copyright 2021, 2022 Anton Krotov
This file is part of CEdit.
CEdit is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
CEdit is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with CEdit. If not, see <http://www.gnu.org/licenses/>.
*)
MODULE Lines;
IMPORT
List, SYSTEM, API, Utils;
CONST
WCHAR_SIZE = 2;
SPACE* = 20X;
TAB* = 9X;
NUL* = 0FDD0X;
TAB1* = 0FDD1X;
TYPE
tLine* = POINTER TO RECORD (List.tItem)
ptr: INTEGER;
length*: INTEGER;
modified*, saved*, temp, label*: BOOLEAN;
cin*, cout*, pos*: INTEGER
END;
PmovInt = PROCEDURE (VAR v: INTEGER; x: INTEGER);
PmovBool = PROCEDURE (line: tLine; VAR v: BOOLEAN; x: BOOLEAN);
PmovPtr = PROCEDURE (VAR v: List.tItem; x: List.tItem);
PTypedPtr = PROCEDURE (p: List.tItem);
PUntypedPtr = PROCEDURE (p: INTEGER);
VAR
_movInt: PmovInt;
_movBool, _movBool2: PmovBool;
_movPtr: PmovPtr;
_typedPtr: PTypedPtr;
_untypedPtr: PUntypedPtr;
pMaxLength, tab*: INTEGER;
tabs*: BOOLEAN;
PROCEDURE movInt (VAR v: INTEGER; x: INTEGER);
BEGIN
_movInt(v, x)
END movInt;
PROCEDURE movBool (line: tLine; VAR v: BOOLEAN; x: BOOLEAN);
BEGIN
_movBool(line, v, x)
END movBool;
PROCEDURE movBool2 (line: tLine; VAR v: BOOLEAN; x: BOOLEAN);
BEGIN
_movBool2(line, v, x)
END movBool2;
PROCEDURE movPtr (VAR v: List.tItem; x: List.tItem);
BEGIN
_movPtr(v, x)
END movPtr;
PROCEDURE malloc (size: INTEGER): INTEGER;
VAR
maxLength: INTEGER;
BEGIN
ASSERT(pMaxLength # 0);
SYSTEM.GET(pMaxLength, maxLength);
IF size > maxLength THEN
SYSTEM.PUT(pMaxLength, size)
END;
size := size*WCHAR_SIZE + 4;
INC(size, (-size) MOD 32)
RETURN API._NEW(size)
END malloc;
PROCEDURE free (line: tLine; newPtr: INTEGER);
BEGIN
IF line.ptr # 0 THEN
IF line.temp THEN
line.ptr := API._DISPOSE(line.ptr)
ELSE
line.ptr := 0
END
END;
IF ~line.temp THEN
movInt(line.ptr, newPtr);
IF newPtr # 0 THEN
_untypedPtr(newPtr)
END
END;
line.ptr := newPtr
END free;
PROCEDURE create* (temp: BOOLEAN): tLine;
VAR
line: tLine;
BEGIN
NEW(line);
line.label := FALSE;
ASSERT(line # NIL);
IF ~temp THEN
_typedPtr(line)
END;
line.next := NIL;
line.prev := NIL;
IF ~temp THEN
movPtr(line.next, NIL);
movPtr(line.prev, NIL)
END;
line.ptr := malloc(1);
ASSERT(line.ptr # 0);
IF ~temp THEN
_untypedPtr(line.ptr);
movInt(line.ptr, line.ptr)
END;
SYSTEM.PUT16(line.ptr, 0);
line.length := 0;
IF ~temp THEN
movInt(line.length, 0)
END;
line.temp := temp;
line.modified := FALSE;
line.saved := FALSE;
IF ~temp THEN
movBool(line, line.modified, FALSE);
movBool(line, line.saved, FALSE)
END;
line.cin := 0;
line.cout := 0;
line.pos := 0
RETURN line
END create;
PROCEDURE destroy* (VAR line: tLine);
BEGIN
IF line.temp THEN
free(line, 0);
DISPOSE(line)
ELSE
line := NIL
END
END destroy;
PROCEDURE resize* (line: tLine; size: INTEGER);
BEGIN
ASSERT(line.temp);
IF size > 0 THEN
line.ptr := API._DISPOSE(line.ptr);
size := size*WCHAR_SIZE + 4;
INC(size, (-size) MOD 32);
line.ptr := API._NEW(size)
ELSE
destroy(line)
END
END resize;
PROCEDURE getChar* (line: tLine; i: INTEGER): WCHAR;
VAR
res: WCHAR;
BEGIN
IF i >= line.length THEN
res := 0X
ELSE
SYSTEM.GET(line.ptr + i*WCHAR_SIZE, res)
END
RETURN res
END getChar;
PROCEDURE tabWidth (line: tLine; pos: INTEGER): INTEGER;
VAR
n: INTEGER;
BEGIN
n := pos;
IF getChar(line, pos) = TAB THEN
INC(pos);
WHILE getChar(line, pos) = TAB1 DO
INC(pos)
END
END
RETURN pos - n
END tabWidth;
PROCEDURE save* (line: tLine);
BEGIN
IF ~line.temp THEN
movBool2(line, line.saved, TRUE);
movBool2(line, line.modified, FALSE)
END;
line.modified := FALSE;
line.saved := TRUE
END save;
PROCEDURE isSpace* (c: WCHAR): BOOLEAN;
RETURN (c = SPACE) OR (c = TAB) OR (c = TAB1)
END isSpace;
PROCEDURE trimLength* (line: tLine): INTEGER;
VAR
i: INTEGER;
BEGIN
i := line.length - 1;
WHILE (i >= 0) & isSpace(getChar(line, i)) DO
DEC(i)
END
RETURN i + 1
END trimLength;
PROCEDURE getPChar* (line: tLine; i: INTEGER): INTEGER;
RETURN line.ptr + i*WCHAR_SIZE
END getPChar;
PROCEDURE setChar* (line: tLine; i: INTEGER; c: WCHAR);
BEGIN
SYSTEM.PUT(line.ptr + i*WCHAR_SIZE, c)
END setChar;
PROCEDURE move* (src, dst: tLine);
BEGIN
SYSTEM.MOVE(src.ptr, dst.ptr, (MIN(src.length, dst.length) + 1)*WCHAR_SIZE)
END move;
PROCEDURE delChar* (line: tLine; pos: INTEGER);
VAR
ptr: INTEGER;
BEGIN
IF pos < line.length THEN
ptr := malloc(line.length);
ASSERT(ptr # 0);
IF ~line.temp THEN
movInt(line.length, line.length - 1)
END;
DEC(line.length);
SYSTEM.MOVE(line.ptr, ptr, pos*WCHAR_SIZE);
SYSTEM.MOVE(line.ptr + pos*WCHAR_SIZE + WCHAR_SIZE, ptr + pos*WCHAR_SIZE, (line.length - pos)*WCHAR_SIZE);
SYSTEM.PUT16(ptr + line.length*WCHAR_SIZE, 0);
free(line, ptr)
END
END delChar;
PROCEDURE insert* (line: tLine; pos: INTEGER; c: WCHAR);
VAR
ptr: INTEGER;
BEGIN
ptr := malloc(line.length + 2);
ASSERT(ptr # 0);
SYSTEM.MOVE(line.ptr, ptr, pos*WCHAR_SIZE);
SYSTEM.PUT(ptr + pos*WCHAR_SIZE, c);
SYSTEM.MOVE(line.ptr + pos*WCHAR_SIZE, ptr + pos*WCHAR_SIZE + WCHAR_SIZE, (line.length - pos)*WCHAR_SIZE);
IF ~line.temp THEN
movInt(line.length, line.length + 1)
END;
INC(line.length);
SYSTEM.PUT16(ptr + line.length*WCHAR_SIZE, 0);
free(line, ptr)
END insert;
PROCEDURE _insert2* (line1: tLine; pos: INTEGER; line2: tLine);
VAR
ptr: INTEGER;
BEGIN
IF line2.length > 0 THEN
ptr := malloc(line1.length + line2.length + 1);
ASSERT(ptr # 0);
SYSTEM.MOVE(line1.ptr, ptr, pos*WCHAR_SIZE);
SYSTEM.MOVE(line2.ptr, ptr + pos*WCHAR_SIZE, line2.length*WCHAR_SIZE);
SYSTEM.MOVE(line1.ptr + pos*WCHAR_SIZE, ptr + (pos + line2.length)*WCHAR_SIZE, (line1.length - pos)*WCHAR_SIZE);
SYSTEM.PUT16(ptr + (line1.length + line2.length)*WCHAR_SIZE, 0);
IF ~line1.temp THEN
movInt(line1.length, line1.length + line2.length)
END;
IF ~line2.temp THEN
movInt(line2.length, 0)
END;
INC(line1.length, line2.length);
free(line1, ptr)
END
END _insert2;
PROCEDURE insert2* (line1: tLine; pos: INTEGER; line2: tLine);
BEGIN
_insert2(line1, pos, line2);
IF line2.length > 0 THEN
line2.length := 0;
free(line2, 0)
END
END insert2;
PROCEDURE insert3* (line: tLine; pos, n: INTEGER);
VAR
ptr: INTEGER;
BEGIN
IF n > 0 THEN
ptr := malloc(line.length + n + 1);
ASSERT(ptr # 0);
SYSTEM.MOVE(line.ptr, ptr, pos*WCHAR_SIZE);
SYSTEM.MOVE(line.ptr + pos*WCHAR_SIZE, ptr + (pos + n)*WCHAR_SIZE, (line.length - pos)*WCHAR_SIZE);
SYSTEM.PUT16(ptr + (line.length + n)*WCHAR_SIZE, 0);
IF ~line.temp THEN
movInt(line.length, line.length + n)
END;
INC(line.length, n);
free(line, ptr)
END
END insert3;
PROCEDURE delCharN* (line: tLine; pos, n: INTEGER);
VAR
ptr: INTEGER;
BEGIN
IF n > 0 THEN
ptr := malloc(line.length - n + 1);
ASSERT(ptr # 0);
SYSTEM.MOVE(line.ptr, ptr, pos*WCHAR_SIZE);
SYSTEM.MOVE(line.ptr + (pos + n)*WCHAR_SIZE, ptr + pos*WCHAR_SIZE, (line.length - pos - n)*WCHAR_SIZE);
SYSTEM.PUT16(ptr + (line.length - n)*WCHAR_SIZE, 0);
IF ~line.temp THEN
movInt(line.length, line.length - n)
END;
DEC(line.length, n);
free(line, ptr)
END
END delCharN;
PROCEDURE fixTabs (line: tLine);
VAR
i, n, k: INTEGER;
BEGIN
i := 0;
WHILE i < line.length DO
n := tabWidth(line, i);
IF n # 0 THEN
k := tab - i MOD tab;
IF n > k THEN
delCharN(line, i + 1, n - k)
ELSIF n < k THEN
DEC(k, n);
insert3(line, i + 1, k);
WHILE k > 0 DO
setChar(line, i + 1, TAB1);
INC(i);
DEC(k)
END
END
END;
INC(i)
END
END fixTabs;
PROCEDURE modify* (line: tLine);
BEGIN
IF ~line.temp THEN
movBool(line, line.modified, TRUE);
movBool(line, line.saved, FALSE)
END;
line.modified := TRUE;
line.saved := FALSE;
fixTabs(line)
END modify;
PROCEDURE wrap* (line, nextLine: tLine; pos: INTEGER);
VAR
ptr1, ptr2: INTEGER;
n: INTEGER;
BEGIN
ptr1 := malloc(pos + 1);
ASSERT(ptr1 # 0);
n := line.length - pos;
ptr2 := malloc(n + 1);
ASSERT(ptr2 # 0);
SYSTEM.MOVE(line.ptr, ptr1, pos*WCHAR_SIZE);
SYSTEM.PUT16(ptr1 + pos*WCHAR_SIZE, 0);
SYSTEM.MOVE(line.ptr + pos*WCHAR_SIZE, ptr2, n*WCHAR_SIZE);
SYSTEM.PUT16(ptr2 + n*WCHAR_SIZE, 0);
IF ~line.temp THEN
movInt(line.length, pos)
END;
IF ~nextLine.temp THEN
movInt(nextLine.length, n)
END;
line.length := pos;
nextLine.length := n;
free(line, ptr1);
free(nextLine, ptr2)
END wrap;
PROCEDURE copy* (line: tLine);
VAR
ptr: INTEGER;
BEGIN
ptr := malloc(line.length + 1);
ASSERT(ptr # 0);
SYSTEM.MOVE(line.ptr, ptr, line.length*WCHAR_SIZE);
SYSTEM.PUT16(ptr + line.length*WCHAR_SIZE, 0);
free(line, ptr)
END copy;
PROCEDURE chCase* (line: tLine; pos1, pos2: INTEGER; upper: BOOLEAN): BOOLEAN;
VAR
i: INTEGER;
modified: BOOLEAN;
c: WCHAR;
func: PROCEDURE (VAR c: WCHAR): BOOLEAN;
BEGIN
modified := FALSE;
IF upper THEN
func := Utils.cap
ELSE
func := Utils.low
END;
i := pos2;
WHILE i >= pos1 DO
c := getChar(line, i);
IF func(c) THEN
modified := TRUE
END;
DEC(i)
END;
IF modified THEN
copy(line);
i := pos2;
WHILE i >= pos1 DO
c := getChar(line, i);
IF func(c) THEN
setChar(line, i, c)
END;
DEC(i)
END;
modify(line)
END
RETURN modified
END chCase;
PROCEDURE init* (movInt: PmovInt; movPtr: PmovPtr; movBool, movBool2: PmovBool; typedPtr: PTypedPtr; untypedPtr: PUntypedPtr);
BEGIN
_movInt := movInt;
_movPtr := movPtr;
_movBool := movBool;
_movBool2 := movBool2;
_typedPtr := typedPtr;
_untypedPtr := untypedPtr;
END init;
PROCEDURE setMaxLength* (VAR maxLength: INTEGER);
BEGIN
pMaxLength := SYSTEM.ADR(maxLength)
END setMaxLength;
PROCEDURE setTabs* (_tab: INTEGER);
BEGIN
IF _tab = 0 THEN
_tab := 4
END;
tabs := _tab > 0;
tab := ABS(_tab);
IF tab > 32 THEN
tab := 32
END
END setTabs;
BEGIN
pMaxLength := 0
END Lines.