Subversion Repositories Kolibri OS

(*

    BSD 2-Clause License

    Copyright (c) 2018-2019, Anton Krotov

    All rights reserved.

*)

MODULE UTILS;

IMPORT HOST;

CONST

    slash* = HOST.slash;

    bit_depth* = HOST.bit_depth;

    maxint* = HOST.maxint;

    minint* = HOST.minint;

    OS = HOST.OS;

    min32* = -2147483647-1;

    max32* =  2147483647;

TYPE

    DAYS = ARRAY 12, 31, 2 OF INTEGER;

VAR

    time*: INTEGER;

    eol*:  ARRAY 3 OF CHAR;

    maxreal*: REAL;

    target*:

      RECORD

          bit_depth*,

          maxInt*,

          minInt*,

          maxSet*,

          maxHex*:    INTEGER;

          maxReal*:   REAL

      END;

    bit_diff*: INTEGER;

    days: DAYS;

PROCEDURE FileRead* (F: INTEGER; VAR Buffer: ARRAY OF CHAR; bytes: INTEGER): INTEGER;

    RETURN HOST.FileRead(F, Buffer, bytes)

END FileRead;

PROCEDURE FileWrite* (F: INTEGER; Buffer: ARRAY OF BYTE; bytes: INTEGER): INTEGER;

    RETURN HOST.FileWrite(F, Buffer, bytes)

END FileWrite;

PROCEDURE FileCreate* (FName: ARRAY OF CHAR): INTEGER;

    RETURN HOST.FileCreate(FName)

END FileCreate;

PROCEDURE FileClose* (F: INTEGER);

BEGIN

    HOST.FileClose(F)

END FileClose;

PROCEDURE FileOpen* (FName: ARRAY OF CHAR): INTEGER;

    RETURN HOST.FileOpen(FName)

END FileOpen;

PROCEDURE GetArg* (i: INTEGER; VAR str: ARRAY OF CHAR);

BEGIN

    HOST.GetArg(i, str)

END GetArg;

PROCEDURE Exit* (code: INTEGER);

BEGIN

    HOST.ExitProcess(code)

END Exit;

PROCEDURE GetTickCount* (): INTEGER;

    RETURN HOST.GetTickCount()

END GetTickCount;

PROCEDURE OutChar* (c: CHAR);

BEGIN

    HOST.OutChar(c)

END OutChar;

PROCEDURE splitf* (x: REAL; VAR a, b: INTEGER): INTEGER;

    RETURN HOST.splitf(x, a, b)

END splitf;

PROCEDURE isRelative* (path: ARRAY OF CHAR): BOOLEAN;

    RETURN HOST.isRelative(path)

END isRelative;

PROCEDURE GetCurrentDirectory* (VAR path: ARRAY OF CHAR);

BEGIN

    HOST.GetCurrentDirectory(path)

END GetCurrentDirectory;

PROCEDURE GetUnixTime* (year, month, day, hour, min, sec: INTEGER): INTEGER;

    RETURN ((year - 1970) * 365 + days[month - 1, day - 1, ORD(year DIV 4 = 0)] + (year - 1969) DIV 4) * 86400 + hour * 3600 + min * 60 + sec

END GetUnixTime;

PROCEDURE UnixTime* (): INTEGER;

VAR

    year, month, day, hour, min, sec: INTEGER;

    res: INTEGER;

BEGIN

    IF OS = "LINUX" THEN

        res := HOST.UnixTime()

    ELSE

        HOST.now(year, month, day, hour, min, sec);

        res := GetUnixTime(year, month, day, hour, min, sec)

    END

    RETURN res

END UnixTime;

PROCEDURE SetBitDepth* (BitDepth: INTEGER);

BEGIN

    ASSERT((BitDepth = 16) OR (BitDepth = 32) OR (BitDepth = 64));

    bit_diff := bit_depth - BitDepth;

    ASSERT(bit_diff >= 0);

    target.bit_depth := BitDepth;

    target.maxSet    := BitDepth - 1;

    target.maxHex    := BitDepth DIV 4;

    target.minInt    := ASR(minint, bit_diff);

    target.maxInt    := ASR(maxint, bit_diff);

    target.maxReal   := 1.9;

    PACK(target.maxReal, 1023);

END SetBitDepth;

PROCEDURE Byte* (n: INTEGER; idx: INTEGER): BYTE;

    RETURN ASR(n, 8 * idx) MOD 256

END Byte;

PROCEDURE Align* (VAR bytes: INTEGER; align: INTEGER): BOOLEAN;

VAR

    res: BOOLEAN;

BEGIN

    IF bytes MOD align # 0 THEN

        res := maxint - bytes >= align - (bytes MOD align);

        IF res THEN

            bytes := bytes + align - (bytes MOD align)

        END

    ELSE

        res := TRUE

    END

    RETURN res

END Align;

PROCEDURE Long* (value: INTEGER): INTEGER;

    RETURN ASR(LSL(value, bit_diff), bit_diff)

END Long;

PROCEDURE Short* (value: INTEGER): INTEGER;

    RETURN LSR(LSL(value, bit_diff), bit_diff)

END Short;

PROCEDURE Log2* (x: INTEGER): INTEGER;

VAR

    n: INTEGER;

BEGIN

    ASSERT(x > 0);

    n := 0;

    WHILE ~ODD(x) DO

        x := x DIV 2;

        INC(n)

    END;

    IF x # 1 THEN

        n := -1

    END

    RETURN n

END Log2;

PROCEDURE init (VAR days: DAYS);

VAR

    i, j, n0, n1: INTEGER;

BEGIN

    FOR i := 0 TO 11 DO

        FOR j := 0 TO 30 DO

            days[i, j, 0] := 0;

            days[i, j, 1] := 0;

        END

    END;

    days[ 1, 28, 0] := -1;

    FOR i := 0 TO 1 DO

        days[ 1, 29, i] := -1;

        days[ 1, 30, i] := -1;

        days[ 3, 30, i] := -1;

        days[ 5, 30, i] := -1;

        days[ 8, 30, i] := -1;

        days[10, 30, i] := -1;

    END;

    n0 := 0;

    n1 := 0;

    FOR i := 0 TO 11 DO

        FOR j := 0 TO 30 DO

            IF days[i, j, 0] = 0 THEN

                days[i, j, 0] := n0;

                INC(n0)

            END;

            IF days[i, j, 1] = 0 THEN

                days[i, j, 1] := n1;

                INC(n1)

            END

        END

    END

END init;

BEGIN

    time := GetTickCount();

    COPY(HOST.eol, eol);

    maxreal := 1.9;

    PACK(maxreal, 1023);

    init(days)

END UTILS.