(*
Copyright 2016, 2017 Anton Krotov
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*)
MODULE RTL;
IMPORT sys := SYSTEM, API;
TYPE
IntArray = ARRAY 2048 OF INTEGER;
STRING = ARRAY 2048 OF CHAR;
PROC = PROCEDURE;
VAR
SelfName, rtab: INTEGER; CloseProc: PROC;
init: BOOLEAN;
PROCEDURE [stdcall] _halt*(n: INTEGER);
BEGIN
API.ExitProcess(n)
END _halt;
PROCEDURE [stdcall] _newrec*(size, t: INTEGER; VAR ptr: INTEGER);
BEGIN
ptr := API._NEW(size);
IF ptr # 0 THEN
sys.PUT(ptr, t);
INC(ptr, 4)
END
END _newrec;
PROCEDURE [stdcall] _disprec*(VAR ptr: INTEGER);
BEGIN
IF ptr # 0 THEN
ptr := API._DISPOSE(ptr - 4)
END
END _disprec;
PROCEDURE [stdcall] _rset*(y, x: INTEGER);
BEGIN
sys.CODE("8B45088B4D0C3BC87F0A83F91F760B83F81F760633C0C9C2080083F9007D0233C983F81F7E05B81F000000BA000000802BC8F7D9D3FA83E81F8BC8F7D9D3EA8BC2C9C20800")
END _rset;
PROCEDURE [stdcall] _inset*(y, x: INTEGER);
BEGIN
sys.CODE("8B45088B4D0C83F91F7709D3E883E001C9C20800C933C0C20800")
END _inset;
PROCEDURE [stdcall] _checktype*(table, t, r: INTEGER);
BEGIN
table := rtab;
sys.CODE("8B450C8B4D1085C975076A0158C9C20C008B51FC8B4D083BD0740D85D27409C1E20203D18B12EBEF33C93BC20F94C18BC1C9C20C00")
END _checktype;
PROCEDURE [stdcall] _savearr*(size, source, dest: INTEGER);
BEGIN
sys.CODE("9CFC8BD78BC68B7D108B750C8B4D08F3A48BFA8BF09D")
END _savearr;
PROCEDURE [stdcall] _saverec*(dyn, stat, size, source, dest: INTEGER): BOOLEAN;
VAR res: BOOLEAN;
BEGIN
res := dyn = stat;
IF res THEN
_savearr(size, source, dest)
END
RETURN res
END _saverec;
PROCEDURE [stdcall] _arrayidx*(Dim: INTEGER; VAR Arr: IntArray; bsize, idx, c: INTEGER);
VAR i, m: INTEGER;
BEGIN
m := bsize * idx;
FOR i := 4 TO Dim + 2 DO
m := m * Arr[i]
END;
IF (Arr[3] > idx) & (idx >= 0) THEN
Arr[3] := c + m
ELSE
Arr[3] := 0
END
END _arrayidx;
PROCEDURE [stdcall] _arrayidx1*(VAR Arr: IntArray; bsize, idx, c: INTEGER);
BEGIN
IF (Arr[3] > idx) & (idx >= 0) THEN
Arr[3] := bsize * idx + c
ELSE
Arr[3] := 0
END
END _arrayidx1;
PROCEDURE [stdcall] _arrayrot*(m, n: INTEGER; VAR Arr: IntArray);
VAR i, j, t: INTEGER;
BEGIN
FOR i := 1 TO n DO
t := Arr[0];
FOR j := 0 TO m + n - 1 DO
Arr[j] := Arr[j + 1]
END;
Arr[m + n] := t
END
END _arrayrot;
PROCEDURE [stdcall] _length*(s: ARRAY OF CHAR): INTEGER;
BEGIN
sys.CODE("8B4508"); // mov eax, [ebp + 08h]
sys.CODE("8B4D0C"); // mov ecx, [ebp + 0Ch]
sys.CODE("48"); // dec eax
// L1:
sys.CODE("40"); // inc eax
sys.CODE("803800"); // cmp byte ptr [eax], 0
sys.CODE("7403"); // jz L2
sys.CODE("E2F8"); // loop L1
sys.CODE("40"); // inc eax
// L2:
sys.CODE("2B4508"); // sub eax, [ebp + 08h]
sys.CODE("C9"); // leave
sys.CODE("C20800"); // ret 08h
RETURN 0
END _length;
PROCEDURE [stdcall] _strcopy*(b, blen, a, alen: INTEGER);
BEGIN
_savearr(MIN(alen, blen), a, b);
IF blen > alen THEN
sys.PUT(b + alen, 0X)
END
END _strcopy;
PROCEDURE [stdcall] _strcmp*(op: INTEGER; b, a: ARRAY OF CHAR): BOOLEAN;
VAR i: INTEGER; Res: BOOLEAN;
BEGIN
i := API.strncmp(sys.ADR(a), sys.ADR(b), MIN(LEN(a), LEN(b)));
IF i = 0 THEN
i := _length(a) - _length(b)
END;
CASE op OF
|0: Res := i = 0
|1: Res := i # 0
|2: Res := i < 0
|3: Res := i > 0
|4: Res := i <= 0
|5: Res := i >= 0
ELSE
END
RETURN Res
END _strcmp;
PROCEDURE [stdcall] _lstrcmp*(op: INTEGER; b: CHAR; a: ARRAY OF CHAR): BOOLEAN;
VAR s: ARRAY 2 OF CHAR;
BEGIN
s[0] := b;
s[1] := 0X;
RETURN _strcmp(op, s, a)
END _lstrcmp;
PROCEDURE [stdcall] _rstrcmp*(op: INTEGER; b: ARRAY OF CHAR; a: CHAR): BOOLEAN;
VAR s: ARRAY 2 OF CHAR;
BEGIN
s[0] := a;
s[1] := 0X;
RETURN _strcmp(op, b, s)
END _rstrcmp;
PROCEDURE Int(x: INTEGER; VAR str: STRING);
VAR i, a, b: INTEGER; c: CHAR;
BEGIN
i := 0;
a := 0;
REPEAT
str[i] := CHR(x MOD 10 + ORD("0"));
x := x DIV 10;
INC(i)
UNTIL x = 0;
b := i - 1;
WHILE a < b DO
c := str[a];
str[a] := str[b];
str[b] := c;
INC(a);
DEC(b)
END;
str[i] := 0X
END Int;
PROCEDURE [stdcall] _assrt*(code, m: INTEGER; modname: STRING; line: INTEGER);
VAR msg, int: STRING; pos, n: INTEGER;
PROCEDURE StrAppend(s: STRING);
VAR i, n: INTEGER;
BEGIN
n := LEN(s);
i := 0;
WHILE (i < n) & (s[i] # 0X) DO
msg[pos] := s[i];
INC(pos);
INC(i)
END
END StrAppend;
BEGIN
pos := 0;
n := line MOD 16;
line := line DIV 16;
CASE n OF
|1: StrAppend("assertion failure")
|2: StrAppend("variable of a procedure type has NIL as value")
|3: StrAppend("typeguard error")
|4: StrAppend("inadmissible dynamic type")
|5: StrAppend("index check error")
|6: StrAppend("NIL pointer dereference")
|7: StrAppend("invalid value in case statement")
|8: StrAppend("division by zero")
ELSE
END;
StrAppend(0DX);
StrAppend(0AX);
StrAppend("module ");
StrAppend(modname);
StrAppend(0DX);
StrAppend(0AX);
StrAppend("line ");
Int(line, int);
StrAppend(int);
IF m = 2 THEN
StrAppend(0DX);
StrAppend(0AX);
StrAppend("code ");
Int(code, int);
StrAppend(int)
END;
API.DebugMsg(sys.ADR(msg), SelfName);
API.ExitThread(0)
END _assrt;
PROCEDURE [stdcall] _close*;
BEGIN
IF CloseProc # NIL THEN
CloseProc
END
END _close;
PROCEDURE [stdcall] _init*(self, rec, gsize, gadr, esp: INTEGER);
BEGIN
IF ~init THEN
API.zeromem(gsize, gadr);
init := TRUE;
API.init(esp);
SelfName := self;
rtab := rec;
CloseProc := NIL
END
END _init;
PROCEDURE SetClose*(proc: PROC);
BEGIN
CloseProc := proc
END SetClose;
END RTL.