Subversion Repositories Kolibri OS

(*

    BSD 2-Clause License

    Copyright (c) 2018, Anton Krotov

    All rights reserved.

*)

MODULE STRINGS;

IMPORT UTILS;

PROCEDURE append* (VAR s1: ARRAY OF CHAR; s2: ARRAY OF CHAR);

VAR

    n1, n2, i, j: INTEGER;

BEGIN

    n1 := LENGTH(s1);

    n2 := LENGTH(s2);

    ASSERT(n1 + n2 < LEN(s1));

    i := 0;

    j := n1;

    WHILE i < n2 DO

        s1[j] := s2[i];

        INC(i);

        INC(j)

    END;

    s1[j] := 0X

END append;

PROCEDURE reverse* (VAR s: ARRAY OF CHAR);

VAR

    i, j: INTEGER;

    a, b: CHAR;

BEGIN

    i := 0;

    j := LENGTH(s) - 1;

    WHILE i < j DO

        a := s[i];

        b := s[j];

        s[i] := b;

        s[j] := a;

        INC(i);

        DEC(j)

    END

END reverse;

PROCEDURE IntToStr* (x: INTEGER; VAR str: ARRAY OF CHAR);

VAR

    i, a: INTEGER;

    minus: BOOLEAN;

BEGIN

    IF x = UTILS.minint THEN

        IF UTILS.bit_depth = 32 THEN

            COPY("-2147483648", str)

        ELSIF UTILS.bit_depth = 64 THEN

            COPY("-9223372036854775808", str)

        END

    ELSE

        minus := x < 0;

        IF minus THEN

            x := -x

        END;

        i := 0;

        a := 0;

        REPEAT

            str[i] := CHR(x MOD 10 + ORD("0"));

            x := x DIV 10;

            INC(i)

        UNTIL x = 0;

        IF minus THEN

            str[i] := "-";

            INC(i)

        END;

        str[i] := 0X;

        reverse(str)

    END

END IntToStr;

PROCEDURE copy* (src: ARRAY OF CHAR; VAR dst: ARRAY OF CHAR; spos, dpos, count: INTEGER);

BEGIN

    WHILE count > 0 DO

        dst[dpos] := src[spos];

        INC(spos);

        INC(dpos);

        DEC(count)

    END

END copy;

PROCEDURE search* (s: ARRAY OF CHAR; VAR pos: INTEGER; c: CHAR; forward: BOOLEAN);

VAR

    length: INTEGER;

BEGIN

    length := LENGTH(s);

    IF (0 <= pos) & (pos < length) THEN

        IF forward THEN

            WHILE (pos < length) & (s[pos] # c) DO

                INC(pos)

            END;

            IF pos = length THEN

                pos := -1

            END

        ELSE

            WHILE (pos >= 0) & (s[pos] # c) DO

                DEC(pos)

            END

        END

    ELSE

        pos := -1

    END

END search;

PROCEDURE letter* (c: CHAR): BOOLEAN;

    RETURN ("a" <= c) & (c <= "z") OR ("A" <= c) & (c <= "Z") OR (c = "_")

END letter;

PROCEDURE digit* (c: CHAR): BOOLEAN;

    RETURN ("0" <= c) & (c <= "9")

END digit;

PROCEDURE hexdigit* (c: CHAR): BOOLEAN;

    RETURN ("0" <= c) & (c <= "9") OR ("A" <= c) & (c <= "F")

END hexdigit;

PROCEDURE space* (c: CHAR): BOOLEAN;

    RETURN (0X < c) & (c <= 20X)

END space;

PROCEDURE StrToInt* (str: ARRAY OF CHAR; VAR x: INTEGER): BOOLEAN;

VAR

    i, k: INTEGER;

    res: BOOLEAN;

BEGIN

    res := TRUE;

    i := 0;

    x := 0;

    k := LENGTH(str);

    WHILE i < k DO

        IF digit(str[i]) THEN

            x := x * 10 + ORD(str[i]) - ORD("0")

        ELSE

            i := k;

            res := FALSE

        END;

        INC(i)

    END

    RETURN res

END StrToInt;

PROCEDURE CheckVer (str: ARRAY OF CHAR): BOOLEAN;

VAR

    i, k: INTEGER;

    res: BOOLEAN;

BEGIN

    k := LENGTH(str);

    res := k < LEN(str);

    IF res & digit(str[0]) THEN

        i := 0;

        WHILE (i < k) & digit(str[i]) DO

            INC(i)

        END;

        IF (i < k) & (str[i] = ".") THEN

            INC(i);

            IF i < k THEN

                WHILE (i < k) & digit(str[i]) DO

                    INC(i)

                END

            ELSE

                res := FALSE

            END

        ELSE

            res := FALSE

        END;

        res := res & (i = k)

    ELSE

        res := FALSE

    END

    RETURN res

END CheckVer;

PROCEDURE StrToVer* (str: ARRAY OF CHAR; VAR major, minor: INTEGER): BOOLEAN;

VAR

    i: INTEGER;

    res: BOOLEAN;

BEGIN

    res := CheckVer(str);

    IF res THEN

        i := 0;

        minor := 0;

        major := 0;

        WHILE digit(str[i]) DO

            major := major * 10 + ORD(str[i]) - ORD("0");

            INC(i)

        END;

        INC(i);

        WHILE digit(str[i]) DO

            minor := minor * 10 + ORD(str[i]) - ORD("0");

            INC(i)

        END

    END

    RETURN res

END StrToVer;

PROCEDURE Utf8To16* (src: ARRAY OF CHAR; VAR dst: ARRAY OF WCHAR): INTEGER;

VAR

    i, j, u, srclen, dstlen: INTEGER;

    c: CHAR;

BEGIN

    srclen := LEN(src);

    dstlen := LEN(dst);

    i := 0;

    j := 0;

    WHILE (i < srclen) & (j < dstlen) & (src[i] # 0X) DO

        c := src[i];

        CASE c OF

        |00X..7FX:

            u := ORD(c)

        |0C1X..0DFX:

            u := LSL(ORD(c) - 0C0H, 6);

            IF i + 1 < srclen THEN

                u := u + ROR(LSL(ORD(src[i + 1]), 26), 26);

                INC(i)

            END

        |0E1X..0EFX:

            u := LSL(ORD(c) - 0E0H, 12);

            IF i + 1 < srclen THEN

                u := u + ROR(LSL(ORD(src[i + 1]), 26), 20);

                INC(i)

            END;

            IF i + 1 < srclen THEN

                u := u + ROR(LSL(ORD(src[i + 1]), 26), 26);

                INC(i)

            END

(*

        |0F1X..0F7X:

        |0F9X..0FBX:

        |0FDX:

        *)

        ELSE

        END;

        INC(i);

        dst[j] := WCHR(u);

        INC(j)

    END;

    IF j < dstlen THEN

        dst[j] := WCHR(0)

    END

    RETURN j

END Utf8To16;

END STRINGS.