Subversion Repositories Kolibri OS

(*

    BSD 2-Clause License

    Copyright (c) 2019-2020, Anton Krotov

    All rights reserved.

*)

MODULE HOST;

IMPORT SYSTEM, API, RTL;

CONST

    slash* = "/";

    eol* = 0AX;

    bit_depth* = RTL.bit_depth;

    maxint* = RTL.maxint;

    minint* = RTL.minint;

    RTLD_LAZY = 1;

TYPE

    TP = ARRAY 2 OF INTEGER;

VAR

    maxreal*: REAL;

    argc: INTEGER;

    libc, librt: INTEGER;

    stdout: INTEGER;

    fread, fwrite : PROCEDURE [linux] (buffer, bytes, blocks, file: INTEGER): INTEGER;

    fopen         : PROCEDURE [linux] (fname, fmode: INTEGER): INTEGER;

    fclose        : PROCEDURE [linux] (file: INTEGER): INTEGER;

    _chmod        : PROCEDURE [linux] (fname: INTEGER; mode: SET): INTEGER;

    time          : PROCEDURE [linux] (ptr: INTEGER): INTEGER;

    clock_gettime : PROCEDURE [linux] (clock_id: INTEGER; VAR tp: TP): INTEGER;

    exit          : PROCEDURE [linux] (code: INTEGER);

PROCEDURE ExitProcess* (code: INTEGER);

BEGIN

    exit(code)

END ExitProcess;

PROCEDURE GetArg* (n: INTEGER; VAR s: ARRAY OF CHAR);

VAR

    i, len, ptr: INTEGER;

    c: CHAR;

BEGIN

    i := 0;

    len := LEN(s) - 1;

    IF (n < argc) & (len > 0) THEN

        SYSTEM.GET(API.MainParam + (n + 1) * SYSTEM.SIZE(INTEGER), ptr);

        REPEAT

            SYSTEM.GET(ptr, c);

            s[i] := c;

            INC(i);

            INC(ptr)

        UNTIL (c = 0X) OR (i = len)

    END;

    s[i] := 0X

END GetArg;

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

VAR

    n: INTEGER;

BEGIN

    GetArg(0, path);

    n := LENGTH(path) - 1;

    WHILE path[n] # slash DO

        DEC(n)

    END;

    path[n + 1] := 0X

END GetCurrentDirectory;

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

VAR

    res: INTEGER;

BEGIN

    res := fread(SYSTEM.ADR(Buffer[0]), 1, bytes, F);

    IF res <= 0 THEN

        res := -1

    END

    RETURN res

END FileRead;

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

VAR

    res: INTEGER;

BEGIN

    res := fwrite(SYSTEM.ADR(Buffer[0]), 1, bytes, F);

    IF res <= 0 THEN

        res := -1

    END

    RETURN res

END FileWrite;

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

    RETURN fopen(SYSTEM.ADR(FName[0]), SYSTEM.SADR("wb"))

END FileCreate;

PROCEDURE FileClose* (File: INTEGER);

BEGIN

    File := fclose(File)

END FileClose;

PROCEDURE chmod* (FName: ARRAY OF CHAR);

VAR

    res: INTEGER;

BEGIN

    res := _chmod(SYSTEM.ADR(FName[0]), {0, 2..8}) (* rwxrwxr-x *)

END chmod;

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

    RETURN fopen(SYSTEM.ADR(FName[0]), SYSTEM.SADR("rb"))

END FileOpen;

PROCEDURE OutChar* (c: CHAR);

VAR

    res: INTEGER;

BEGIN

    res := fwrite(SYSTEM.ADR(c), 1, 1, stdout)

END OutChar;

PROCEDURE GetTickCount* (): INTEGER;

VAR

    tp:  TP;

    res: INTEGER;

BEGIN

    IF clock_gettime(0, tp) = 0 THEN

        res := tp[0] * 100 + tp[1] DIV 10000000

    ELSE

        res := 0

    END

    RETURN res

END GetTickCount;

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

    RETURN path[0] # slash

END isRelative;

PROCEDURE UnixTime* (): INTEGER;

    RETURN time(0)

END UnixTime;

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

BEGIN

    SYSTEM.GET32(SYSTEM.ADR(x), a);

    SYSTEM.GET32(SYSTEM.ADR(x) + 4, b)

    RETURN a

END splitf;

PROCEDURE d2s* (x: REAL): INTEGER;

VAR

    h, l, s, e: INTEGER;

BEGIN

    e := splitf(x, l, h);

    s := ASR(h, 31) MOD 2;

    e := (h DIV 100000H) MOD 2048;

    IF e <= 896 THEN

        h := (h MOD 100000H) * 8 + (l DIV 20000000H) MOD 8 + 800000H;

        REPEAT

            h := h DIV 2;

            INC(e)

        UNTIL e = 897;

        e := 896;

        l := (h MOD 8) * 20000000H;

        h := h DIV 8

    ELSIF (1151 <= e) & (e < 2047) THEN

        e := 1151;

        h := 0;

        l := 0

    ELSIF e = 2047 THEN

        e := 1151;

        IF (h MOD 100000H # 0) OR (BITS(l) * {0..31} # {}) THEN

            h := 80000H;

            l := 0

        END

    END;

    DEC(e, 896)

    RETURN LSL(s, 31) + LSL(e, 23) + (h MOD 100000H) * 8 + (l DIV 20000000H) MOD 8

END d2s;

PROCEDURE GetSym (lib: INTEGER; name: ARRAY OF CHAR; VarAdr: INTEGER);

VAR

    sym: INTEGER;

BEGIN

    sym := API.dlsym(lib, SYSTEM.ADR(name[0]));

    ASSERT(sym # 0);

    SYSTEM.PUT(VarAdr, sym)

END GetSym;

BEGIN

    maxreal := 1.9;

    PACK(maxreal, 1023);

    SYSTEM.GET(API.MainParam, argc);

    libc := API.libc;

    GetSym(libc, "fread",  SYSTEM.ADR(fread));

    GetSym(libc, "fwrite", SYSTEM.ADR(fwrite));

    GetSym(libc, "fopen",  SYSTEM.ADR(fopen));

    GetSym(libc, "fclose", SYSTEM.ADR(fclose));

    GetSym(libc, "chmod",  SYSTEM.ADR(_chmod));

    GetSym(libc, "time",   SYSTEM.ADR(time));

    GetSym(libc, "exit",   SYSTEM.ADR(exit));

    GetSym(libc, "stdout", SYSTEM.ADR(stdout)); SYSTEM.GET(stdout - SYSTEM.SIZE(INTEGER), stdout);

    librt := API.dlopen(SYSTEM.SADR("librt.so.1"), RTLD_LAZY);

    GetSym(librt, "clock_gettime", SYSTEM.ADR(clock_gettime))

END HOST.