forked from KolibriOS/kolibrios
295 lines
6.6 KiB
Plaintext
295 lines
6.6 KiB
Plaintext
(*
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Copyright 2013, 2017, 2018, 2019 Anton Krotov
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser 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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This program 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*)
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MODULE In;
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IMPORT sys := SYSTEM;
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TYPE
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STRING = ARRAY 260 OF CHAR;
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VAR
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Done*: BOOLEAN;
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hConsoleInput: INTEGER;
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PROCEDURE [windows-, "kernel32.dll", "GetStdHandle"]
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GetStdHandle (nStdHandle: INTEGER): INTEGER;
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PROCEDURE [windows-, "kernel32.dll", "ReadConsoleA"]
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ReadConsole (hConsoleInput, lpBuffer, nNumberOfCharsToRead, lpNumberOfCharsRead, lpReserved: INTEGER): INTEGER;
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PROCEDURE digit(ch: CHAR): BOOLEAN;
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RETURN (ch >= "0") & (ch <= "9")
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END digit;
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PROCEDURE CheckInt(s: STRING; VAR first, last: INTEGER; VAR neg: BOOLEAN; Point: BOOLEAN): BOOLEAN;
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VAR i: INTEGER;
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BEGIN
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i := 0;
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neg := FALSE;
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WHILE (s[i] <= 20X) & (s[i] # 0X) DO
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INC(i)
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END;
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IF s[i] = "-" THEN
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neg := TRUE;
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INC(i)
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ELSIF s[i] = "+" THEN
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INC(i)
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END;
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first := i;
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WHILE digit(s[i]) DO
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INC(i)
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END;
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last := i
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RETURN ((s[i] <= 20X) OR (Point & (s[i] = "."))) & digit(s[first])
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END CheckInt;
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PROCEDURE IsMinInt(str: STRING; pos: INTEGER): BOOLEAN;
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VAR i: INTEGER; min: STRING;
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BEGIN
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i := 0;
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min := "2147483648";
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WHILE (min[i] # 0X) & (str[i] # 0X) & (min[i] = str[i + pos]) DO
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INC(i)
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END
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RETURN i = 10
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END IsMinInt;
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PROCEDURE StrToInt(str: STRING; VAR err: BOOLEAN): INTEGER;
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CONST maxINT = 7FFFFFFFH;
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VAR i, n, res: INTEGER; flag, neg: BOOLEAN;
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BEGIN
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res := 0;
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flag := CheckInt(str, i, n, neg, FALSE);
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err := ~flag;
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IF flag & neg & IsMinInt(str, i) THEN
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flag := FALSE;
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neg := FALSE;
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res := 80000000H
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END;
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WHILE flag & digit(str[i]) DO
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IF res > maxINT DIV 10 THEN
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err := TRUE;
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flag := FALSE;
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res := 0
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ELSE
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res := res * 10;
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IF res > maxINT - (ORD(str[i]) - ORD("0")) THEN
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err := TRUE;
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flag := FALSE;
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res := 0
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ELSE
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res := res + (ORD(str[i]) - ORD("0"));
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INC(i)
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END
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END
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END;
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IF neg THEN
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res := -res
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END
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RETURN res
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END StrToInt;
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PROCEDURE Space(s: STRING): BOOLEAN;
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VAR i: INTEGER;
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BEGIN
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i := 0;
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WHILE (s[i] # 0X) & (s[i] <= 20X) DO
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INC(i)
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END
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RETURN s[i] = 0X
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END Space;
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PROCEDURE CheckReal(s: STRING; VAR n: INTEGER; VAR neg: BOOLEAN): BOOLEAN;
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VAR i: INTEGER; Res: BOOLEAN;
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BEGIN
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Res := CheckInt(s, n, i, neg, TRUE);
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IF Res THEN
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IF s[i] = "." THEN
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INC(i);
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WHILE digit(s[i]) DO
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INC(i)
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END;
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IF (s[i] = "D") OR (s[i] = "E") OR (s[i] = "d") OR (s[i] = "e") THEN
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INC(i);
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IF (s[i] = "+") OR (s[i] = "-") THEN
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INC(i)
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END;
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Res := digit(s[i]);
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WHILE digit(s[i]) DO
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INC(i)
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END
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END
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END
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END
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RETURN Res & (s[i] <= 20X)
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END CheckReal;
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PROCEDURE StrToFloat(str: STRING; VAR err: BOOLEAN): REAL;
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CONST maxDBL = 1.69E308; maxINT = 7FFFFFFFH;
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VAR i, scale: INTEGER; res, m, d: REAL; minus, neg: BOOLEAN;
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PROCEDURE part1(VAR res, d: REAL; VAR i: INTEGER; str: STRING): BOOLEAN;
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BEGIN
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res := 0.0;
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d := 1.0;
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WHILE digit(str[i]) DO
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res := res * 10.0 + FLT(ORD(str[i]) - ORD("0"));
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INC(i)
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END;
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IF str[i] = "." THEN
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INC(i);
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WHILE digit(str[i]) DO
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d := d / 10.0;
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res := res + FLT(ORD(str[i]) - ORD("0")) * d;
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INC(i)
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END
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END
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RETURN str[i] # 0X
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END part1;
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PROCEDURE part2(VAR i, scale: INTEGER; VAR m, res: REAL; VAR minus, err: BOOLEAN; str: STRING): BOOLEAN;
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BEGIN
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INC(i);
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m := 10.0;
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minus := FALSE;
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IF str[i] = "+" THEN
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INC(i)
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ELSIF str[i] = "-" THEN
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minus := TRUE;
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INC(i);
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m := 0.1
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END;
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scale := 0;
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err := FALSE;
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WHILE ~err & digit(str[i]) DO
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IF scale > maxINT DIV 10 THEN
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err := TRUE;
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res := 0.0
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ELSE
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scale := scale * 10;
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IF scale > maxINT - (ORD(str[i]) - ORD("0")) THEN
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err := TRUE;
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res := 0.0
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ELSE
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scale := scale + (ORD(str[i]) - ORD("0"));
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INC(i)
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END
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END
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END
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RETURN ~err
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END part2;
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PROCEDURE part3 (VAR err, minus: BOOLEAN; VAR scale: INTEGER; VAR res, m: REAL);
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VAR i: INTEGER;
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BEGIN
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err := FALSE;
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IF scale = maxINT THEN
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err := TRUE;
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res := 0.0
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END;
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i := 1;
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WHILE ~err & (i <= scale) DO
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IF ~minus & (res > maxDBL / m) THEN
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err := TRUE;
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res := 0.0
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ELSE
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res := res * m;
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INC(i)
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END
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END
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END part3;
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BEGIN
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IF CheckReal(str, i, neg) THEN
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IF part1(res, d, i, str) & part2(i, scale, m, res, minus, err, str) THEN
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part3(err, minus, scale, res, m)
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END;
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IF neg THEN
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res := -res
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END
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ELSE
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res := 0.0;
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err := TRUE
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END
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RETURN res
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END StrToFloat;
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PROCEDURE String*(VAR s: ARRAY OF CHAR);
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VAR count, i: INTEGER; str: STRING;
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BEGIN
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ReadConsole(hConsoleInput, sys.ADR(str[0]), 256, sys.ADR(count), 0);
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IF (str[count - 1] = 0AX) & (str[count - 2] = 0DX) THEN
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DEC(count, 2)
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END;
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str[256] := 0X;
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str[count] := 0X;
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i := 0;
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WHILE (i < LEN(s) - 1) & (i < LEN(str)) & (str[i] # 0X) DO
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s[i] := str[i];
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INC(i)
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END;
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s[i] := 0X;
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Done := TRUE
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END String;
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PROCEDURE Char*(VAR x: CHAR);
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VAR str: STRING;
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BEGIN
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String(str);
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x := str[0];
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Done := TRUE
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END Char;
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PROCEDURE Ln*;
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VAR str: STRING;
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BEGIN
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String(str);
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Done := TRUE
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END Ln;
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PROCEDURE Real*(VAR x: REAL);
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VAR str: STRING; err: BOOLEAN;
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BEGIN
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err := FALSE;
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REPEAT
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String(str)
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UNTIL ~Space(str);
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x := StrToFloat(str, err);
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Done := ~err
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END Real;
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PROCEDURE Int*(VAR x: INTEGER);
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VAR str: STRING; err: BOOLEAN;
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BEGIN
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err := FALSE;
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REPEAT
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String(str)
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UNTIL ~Space(str);
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x := StrToInt(str, err);
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Done := ~err
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END Int;
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PROCEDURE Open*;
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BEGIN
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hConsoleInput := GetStdHandle(-10);
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Done := TRUE
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END Open;
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END In. |