forked from KolibriOS/kolibrios
146 lines
3.6 KiB
Plaintext
146 lines
3.6 KiB
Plaintext
(*
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Copyright 2021-2023 Anton Krotov
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This file is part of CEdit.
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CEdit is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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CEdit is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with CEdit. If not, see <http://www.gnu.org/licenses/>.
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*)
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MODULE Search;
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IMPORT
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CB := Clipboard, List, Utils, SYSTEM;
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TYPE
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tBuffer* = CB.tBuffer;
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tIdxTable = ARRAY 65536, 2 OF INTEGER;
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tPos* = POINTER TO RECORD (List.tItem)
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pos*: INTEGER
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END;
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VAR
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table: POINTER TO RECORD data: tIdxTable END;
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PROCEDURE _index (text: tBuffer; cs: BOOLEAN; VAR table: tIdxTable): tBuffer;
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VAR
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pChar, cnt, i: INTEGER;
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c: WCHAR;
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res: tBuffer;
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BEGIN
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pChar := text.dataPtr;
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cnt := CB.bufSize(text) DIV SYSTEM.SIZE(WCHAR);
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FOR i := 0 TO 65535 DO
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table[i, 1] := 0
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END;
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i := cnt;
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WHILE i > 0 DO
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SYSTEM.GET(pChar, c);
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IF ~cs & Utils.cap(c) THEN
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SYSTEM.PUT(pChar, c)
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END;
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INC(table[ORD(c), 1]);
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INC(pChar, SYSTEM.SIZE(WCHAR));
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DEC(i)
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END;
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res := CB.create(cnt*SYSTEM.SIZE(INTEGER));
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table[0, 0] := res.dataPtr;
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FOR i := 1 TO 65535 DO
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table[i, 0] := table[i - 1, 0] + table[i - 1, 1]*SYSTEM.SIZE(INTEGER)
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END;
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pChar := text.dataPtr;
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i := 0;
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WHILE i < cnt DO
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SYSTEM.GET(pChar, c);
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SYSTEM.PUT(table[ORD(c), 0], i);
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INC(table[ORD(c), 0], SYSTEM.SIZE(INTEGER));
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INC(pChar, SYSTEM.SIZE(WCHAR));
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INC(i)
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END;
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FOR i := 0 TO 65535 DO
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DEC(table[i, 0], table[i, 1]*SYSTEM.SIZE(INTEGER))
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END
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RETURN res
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END _index;
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PROCEDURE index* (text: tBuffer; cs: BOOLEAN): tBuffer;
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BEGIN
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IF table = NIL THEN
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NEW(table)
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END
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RETURN _index(text, cs, table.data)
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END index;
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PROCEDURE find* (text: tBuffer; s: ARRAY OF WCHAR; whole: BOOLEAN; list: List.tList);
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VAR
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k, pos, n, x, prev_item_pos: INTEGER;
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item: tPos;
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c1, c2: WCHAR;
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flag: BOOLEAN;
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BEGIN
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ASSERT(table # NIL);
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n := LENGTH(s);
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k := table.data[ORD(s[0]), 1];
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pos := table.data[ORD(s[0]), 0];
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prev_item_pos := 0;
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WHILE k > 0 DO
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SYSTEM.GET(pos, x);
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IF Utils.streq(text.dataPtr + x*SYSTEM.SIZE(WCHAR), SYSTEM.ADR(s[0]), n) THEN
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flag := whole;
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IF flag THEN
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IF x > 0 THEN
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SYSTEM.GET(text.dataPtr + (x - 1)*SYSTEM.SIZE(WCHAR), c1);
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ELSE
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c1 := 0X
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END;
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SYSTEM.GET(text.dataPtr + (x + n)*SYSTEM.SIZE(WCHAR), c2);
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flag := Utils.isLetter(c1) OR Utils.isLetter(c2) OR Utils.isDigit(c1) OR Utils.isDigit(c2) OR
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(c1 = "_") OR (c2 = "_")
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END;
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IF ~flag & (x >= prev_item_pos) THEN
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prev_item_pos := x + n;
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NEW(item);
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item.pos := x;
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List.append(list, item)
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END
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END;
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INC(pos, SYSTEM.SIZE(INTEGER));
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DEC(k)
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END
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END find;
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PROCEDURE close*;
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BEGIN
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IF table # NIL THEN
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DISPOSE(table)
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END
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END close;
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BEGIN
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table := NIL
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END Search. |