kolibrios/programs/other/fb2reader/SRC/Vector.ob07
Anton Krotov c56f682434 FB2 Reader: refactoring, reduced memory usage for images, small improvements
git-svn-id: svn://kolibrios.org@9898 a494cfbc-eb01-0410-851d-a64ba20cac60
2023-02-01 13:36:55 +00:00

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(*
Copyright 2016, 2023 Anton Krotov
This file is part of fb2read.
fb2read 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.
fb2read 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 fb2read. If not, see <http://www.gnu.org/licenses/>.
*)
MODULE Vector;
IMPORT SYSTEM, K := KOSAPI;
CONST
ptr_size = 4;
TYPE
DESC_VECTOR = RECORD
data : INTEGER;
count* : INTEGER;
size : INTEGER
END;
VECTOR* = POINTER TO DESC_VECTOR;
ANYREC* = RECORD END;
ANYPTR* = POINTER TO ANYREC;
DESTRUCTOR* = PROCEDURE (VAR ptr: ANYPTR);
PROCEDURE push* (vector: VECTOR; value: ANYPTR);
BEGIN
IF vector.count = vector.size THEN
vector.data := K.realloc(vector.data, (vector.size + 1024) * ptr_size);
vector.size := vector.size + 1024
END;
SYSTEM.PUT(vector.data + vector.count * ptr_size, value);
INC(vector.count)
END push;
PROCEDURE get* (vector: VECTOR; idx: INTEGER): ANYPTR;
VAR
res: ANYPTR;
BEGIN
ASSERT( (0 <= idx) & (idx < vector.count) );
SYSTEM.GET(vector.data + idx * ptr_size, res)
RETURN res
END get;
PROCEDURE put* (vector: VECTOR; idx: INTEGER; value: ANYPTR);
BEGIN
ASSERT( (0 <= idx) & (idx < vector.count) );
SYSTEM.PUT(vector.data + idx * ptr_size, value)
END put;
PROCEDURE create* (size: INTEGER): VECTOR;
VAR
vector: VECTOR;
BEGIN
NEW(vector);
vector.data := K.malloc(ptr_size * size);
vector.size := size;
vector.count := 0
RETURN vector
END create;
PROCEDURE def_destructor (VAR any: ANYPTR);
BEGIN
DISPOSE(any)
END def_destructor;
PROCEDURE destroy* (VAR vector: VECTOR; destructor: DESTRUCTOR);
VAR
i: INTEGER;
any: ANYPTR;
BEGIN
IF destructor = NIL THEN
destructor := def_destructor
END;
FOR i := 0 TO vector.count - 1 DO
any := get(vector, i);
destructor(any)
END;
vector.data := K.free(vector.data);
DISPOSE(vector)
END destroy;
END Vector.