(*
BSD 2-Clause License
Copyright (c) 2018, 2019, Anton Krotov
All rights reserved.
*)
MODULE RTL;
IMPORT SYSTEM, API;
CONST
bit_depth* = 32;
maxint* = 7FFFFFFFH;
minint* = 80000000H;
DLL_PROCESS_ATTACH = 1;
DLL_THREAD_ATTACH = 2;
DLL_THREAD_DETACH = 3;
DLL_PROCESS_DETACH = 0;
SIZE_OF_DWORD = 4;
TYPE
DLL_ENTRY* = PROCEDURE (hinstDLL, fdwReason, lpvReserved: INTEGER);
VAR
name: INTEGER;
types: INTEGER;
dll: RECORD
process_detach,
thread_detach,
thread_attach: DLL_ENTRY
END;
PROCEDURE [stdcall] _move* (bytes, source, dest: INTEGER);
BEGIN
SYSTEM.CODE(
08BH, 045H, 008H, (* mov eax, dword [ebp + 8] *)
085H, 0C0H, (* test eax, eax *)
07EH, 019H, (* jle L *)
0FCH, (* cld *)
057H, (* push edi *)
056H, (* push esi *)
08BH, 075H, 00CH, (* mov esi, dword [ebp + 12] *)
08BH, 07DH, 010H, (* mov edi, dword [ebp + 16] *)
089H, 0C1H, (* mov ecx, eax *)
0C1H, 0E9H, 002H, (* shr ecx, 2 *)
0F3H, 0A5H, (* rep movsd *)
089H, 0C1H, (* mov ecx, eax *)
083H, 0E1H, 003H, (* and ecx, 3 *)
0F3H, 0A4H, (* rep movsb *)
05EH, (* pop esi *)
05FH (* pop edi *)
(* L: *)
)
END _move;
PROCEDURE [stdcall] _move2* (bytes, dest, source: INTEGER);
BEGIN
SYSTEM.CODE(
08BH, 045H, 008H, (* mov eax, dword [ebp + 8] *)
085H, 0C0H, (* test eax, eax *)
07EH, 019H, (* jle L *)
0FCH, (* cld *)
057H, (* push edi *)
056H, (* push esi *)
08BH, 075H, 010H, (* mov esi, dword [ebp + 16] *)
08BH, 07DH, 00CH, (* mov edi, dword [ebp + 12] *)
089H, 0C1H, (* mov ecx, eax *)
0C1H, 0E9H, 002H, (* shr ecx, 2 *)
0F3H, 0A5H, (* rep movsd *)
089H, 0C1H, (* mov ecx, eax *)
083H, 0E1H, 003H, (* and ecx, 3 *)
0F3H, 0A4H, (* rep movsb *)
05EH, (* pop esi *)
05FH (* pop edi *)
(* L: *)
)
END _move2;
PROCEDURE [stdcall] _arrcpy* (base_size, len_dst, dst, len_src, src: INTEGER): BOOLEAN;
VAR
res: BOOLEAN;
BEGIN
IF len_src > len_dst THEN
res := FALSE
ELSE
_move(len_src * base_size, src, dst);
res := TRUE
END
RETURN res
END _arrcpy;
PROCEDURE [stdcall] _strcpy* (chr_size, len_dst, dst, len_src, src: INTEGER);
BEGIN
_move(MIN(len_dst, len_src) * chr_size, src, dst)
END _strcpy;
PROCEDURE [stdcall] _strcpy2* (chr_size, len_src, src, len_dst, dst: INTEGER);
BEGIN
_move(MIN(len_dst, len_src) * chr_size, src, dst)
END _strcpy2;
PROCEDURE [stdcall] _rot* (VAR A: ARRAY OF INTEGER);
VAR
i, n, k: INTEGER;
BEGIN
k := LEN(A) - 1;
n := A[0];
i := 0;
WHILE i < k DO
A[i] := A[i + 1];
INC(i)
END;
A[k] := n
END _rot;
PROCEDURE [stdcall] _set2* (a, b: INTEGER): INTEGER;
VAR
res: INTEGER;
BEGIN
IF (a <= b) & (a <= 31) & (b >= 0) THEN
IF b > 31 THEN
b := 31
END;
IF a < 0 THEN
a := 0
END;
res := LSR(ASR(ROR(1, 1), b - a), 31 - b)
ELSE
res := 0
END
RETURN res
END _set2;
PROCEDURE [stdcall] _set* (b, a: INTEGER): INTEGER;
RETURN _set2(a, b)
END _set;
PROCEDURE [stdcall] divmod (a, b: INTEGER; VAR mod: INTEGER): INTEGER;
BEGIN
SYSTEM.CODE(
08BH, 045H, 008H, (* mov eax, dword [ebp + 8] *)
08BH, 04DH, 00CH, (* mov ecx, dword [ebp + 12] *)
031H, 0D2H, (* xor edx, edx *)
085H, 0C0H, (* test eax, eax *)
07DH, 002H, (* jge L1 *)
0F7H, 0D2H, (* not edx *)
(* L1: *)
0F7H, 0F9H, (* idiv ecx *)
08BH, 04DH, 010H, (* mov ecx, dword [ebp + 16] *)
089H, 011H, (* mov dword [ecx], edx *)
0C9H, (* leave *)
0C2H, 00CH, 000H (* ret 12 *)
)
RETURN 0
END divmod;
PROCEDURE div_ (x, y: INTEGER): INTEGER;
VAR
div, mod: INTEGER;
BEGIN
div := divmod(x, y, mod);
IF (mod # 0) & ((x < 0) & (y > 0) OR (x > 0) & (y < 0)) THEN
DEC(div)
END
RETURN div
END div_;
PROCEDURE mod_ (x, y: INTEGER): INTEGER;
VAR
div, mod: INTEGER;
BEGIN
div := divmod(x, y, mod);
IF (mod # 0) & ((x < 0) & (y > 0) OR (x > 0) & (y < 0)) THEN
INC(mod, y)
END
RETURN mod
END mod_;
PROCEDURE [stdcall] _div* (b, a: INTEGER): INTEGER;
RETURN div_(a, b)
END _div;
PROCEDURE [stdcall] _div2* (a, b: INTEGER): INTEGER;
RETURN div_(a, b)
END _div2;
PROCEDURE [stdcall] _mod* (b, a: INTEGER): INTEGER;
RETURN mod_(a, b)
END _mod;
PROCEDURE [stdcall] _mod2* (a, b: INTEGER): INTEGER;
RETURN mod_(a, b)
END _mod2;
PROCEDURE [stdcall] _new* (t, size: INTEGER; VAR ptr: INTEGER);
BEGIN
ptr := API._NEW(size);
IF ptr # 0 THEN
SYSTEM.PUT(ptr, t);
INC(ptr, SIZE_OF_DWORD)
END
END _new;
PROCEDURE [stdcall] _dispose* (VAR ptr: INTEGER);
BEGIN
IF ptr # 0 THEN
ptr := API._DISPOSE(ptr - SIZE_OF_DWORD)
END
END _dispose;
PROCEDURE strncmp (a, b, n: INTEGER): INTEGER;
VAR
A, B: CHAR;
res: INTEGER;
BEGIN
res := 0;
WHILE n > 0 DO
SYSTEM.GET(a, A); INC(a);
SYSTEM.GET(b, B); INC(b);
DEC(n);
IF A # B THEN
res := ORD(A) - ORD(B);
n := 0
ELSIF A = 0X THEN
n := 0
END
END
RETURN res
END strncmp;
PROCEDURE strncmpw (a, b, n: INTEGER): INTEGER;
VAR
A, B: WCHAR;
res: INTEGER;
BEGIN
res := 0;
WHILE n > 0 DO
SYSTEM.GET(a, A); INC(a, 2);
SYSTEM.GET(b, B); INC(b, 2);
DEC(n);
IF A # B THEN
res := ORD(A) - ORD(B);
n := 0
ELSIF A = 0X THEN
n := 0
END
END
RETURN res
END strncmpw;
PROCEDURE [stdcall] _length* (len, str: INTEGER): INTEGER;
BEGIN
SYSTEM.CODE(
08BH, 045H, 00CH, (* mov eax, dword [ebp + 0Ch] *)
08BH, 04DH, 008H, (* mov ecx, dword [ebp + 08h] *)
048H, (* dec eax *)
(* L1: *)
040H, (* inc eax *)
080H, 038H, 000H, (* cmp byte [eax], 0 *)
074H, 003H, (* jz L2 *)
0E2H, 0F8H, (* loop L1 *)
040H, (* inc eax *)
(* L2: *)
02BH, 045H, 00CH, (* sub eax, dword [ebp + 0Ch] *)
0C9H, (* leave *)
0C2H, 008H, 000H (* ret 08h *)
)
RETURN 0
END _length;
PROCEDURE [stdcall] _lengthw* (len, str: INTEGER): INTEGER;
BEGIN
SYSTEM.CODE(
08BH, 045H, 00CH, (* mov eax, dword [ebp + 0Ch] *)
08BH, 04DH, 008H, (* mov ecx, dword [ebp + 08h] *)
048H, (* dec eax *)
048H, (* dec eax *)
(* L1: *)
040H, (* inc eax *)
040H, (* inc eax *)
066H, 083H, 038H, 000H, (* cmp word [eax], 0 *)
074H, 004H, (* jz L2 *)
0E2H, 0F6H, (* loop L1 *)
040H, (* inc eax *)
040H, (* inc eax *)
(* L2: *)
02BH, 045H, 00CH, (* sub eax, dword [ebp + 0Ch] *)
0D1H, 0E8H, (* shr eax, 1 *)
0C9H, (* leave *)
0C2H, 008H, 000H (* ret 08h *)
)
RETURN 0
END _lengthw;
PROCEDURE [stdcall] _strcmp* (op, len2, str2, len1, str1: INTEGER): BOOLEAN;
VAR
res: INTEGER;
bRes: BOOLEAN;
BEGIN
res := strncmp(str1, str2, MIN(len1, len2));
IF res = 0 THEN
res := _length(len1, str1) - _length(len2, str2)
END;
CASE op OF
|0: bRes := res = 0
|1: bRes := res # 0
|2: bRes := res < 0
|3: bRes := res <= 0
|4: bRes := res > 0
|5: bRes := res >= 0
END
RETURN bRes
END _strcmp;
PROCEDURE [stdcall] _strcmp2* (op, len1, str1, len2, str2: INTEGER): BOOLEAN;
RETURN _strcmp(op, len2, str2, len1, str1)
END _strcmp2;
PROCEDURE [stdcall] _strcmpw* (op, len2, str2, len1, str1: INTEGER): BOOLEAN;
VAR
res: INTEGER;
bRes: BOOLEAN;
BEGIN
res := strncmpw(str1, str2, MIN(len1, len2));
IF res = 0 THEN
res := _lengthw(len1, str1) - _lengthw(len2, str2)
END;
CASE op OF
|0: bRes := res = 0
|1: bRes := res # 0
|2: bRes := res < 0
|3: bRes := res <= 0
|4: bRes := res > 0
|5: bRes := res >= 0
END
RETURN bRes
END _strcmpw;
PROCEDURE [stdcall] _strcmpw2* (op, len1, str1, len2, str2: INTEGER): BOOLEAN;
RETURN _strcmpw(op, len2, str2, len1, str1)
END _strcmpw2;
PROCEDURE PCharToStr (pchar: INTEGER; VAR s: ARRAY OF CHAR);
VAR
c: CHAR;
i: INTEGER;
BEGIN
i := 0;
REPEAT
SYSTEM.GET(pchar, c);
s[i] := c;
INC(pchar);
INC(i)
UNTIL c = 0X
END PCharToStr;
PROCEDURE IntToStr (x: INTEGER; VAR str: ARRAY OF CHAR);
VAR
i, a, b: INTEGER;
c: CHAR;
BEGIN
i := 0;
REPEAT
str[i] := CHR(x MOD 10 + ORD("0"));
x := x DIV 10;
INC(i)
UNTIL x = 0;
a := 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 IntToStr;
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 [stdcall] _error* (module, err: INTEGER);
VAR
s, temp: ARRAY 1024 OF CHAR;
BEGIN
s := "";
CASE err MOD 16 OF
| 1: append(s, "assertion failure")
| 2: append(s, "NIL dereference")
| 3: append(s, "division by zero")
| 4: append(s, "NIL procedure call")
| 5: append(s, "type guard error")
| 6: append(s, "index out of range")
| 7: append(s, "invalid CASE")
| 8: append(s, "array assignment error")
| 9: append(s, "CHR out of range")
|10: append(s, "WCHR out of range")
|11: append(s, "BYTE out of range")
END;
append(s, API.eol);
append(s, "module: "); PCharToStr(module, temp); append(s, temp); append(s, API.eol);
append(s, "line: "); IntToStr(LSR(err, 4), temp); append(s, temp);
API.DebugMsg(SYSTEM.ADR(s[0]), name);
API.exit_thread(0)
END _error;
PROCEDURE [stdcall] _isrec* (t0, t1, r: INTEGER): BOOLEAN;
BEGIN
(* r IS t0 *)
WHILE (t1 # 0) & (t1 # t0) DO
SYSTEM.GET(types + t1 * SIZE_OF_DWORD, t1)
END
RETURN t1 = t0
END _isrec;
PROCEDURE [stdcall] _is* (t0, p: INTEGER): BOOLEAN;
VAR
t1: INTEGER;
BEGIN
(* p IS t0 *)
IF p # 0 THEN
DEC(p, SIZE_OF_DWORD);
SYSTEM.GET(p, t1);
WHILE (t1 # 0) & (t1 # t0) DO
SYSTEM.GET(types + t1 * SIZE_OF_DWORD, t1)
END
ELSE
t1 := -1
END
RETURN t1 = t0
END _is;
PROCEDURE [stdcall] _guardrec* (t0, t1: INTEGER): BOOLEAN;
BEGIN
(* r:t1 IS t0 *)
WHILE (t1 # 0) & (t1 # t0) DO
SYSTEM.GET(types + t1 * SIZE_OF_DWORD, t1)
END
RETURN t1 = t0
END _guardrec;
PROCEDURE [stdcall] _guard* (t0, p: INTEGER): BOOLEAN;
VAR
t1: INTEGER;
BEGIN
(* p IS t0 *)
SYSTEM.GET(p, p);
IF p # 0 THEN
DEC(p, SIZE_OF_DWORD);
SYSTEM.GET(p, t1);
WHILE (t1 # t0) & (t1 # 0) DO
SYSTEM.GET(types + t1 * SIZE_OF_DWORD, t1)
END
ELSE
t1 := t0
END
RETURN t1 = t0
END _guard;
PROCEDURE [stdcall] _dllentry* (hinstDLL, fdwReason, lpvReserved: INTEGER): INTEGER;
VAR
res: INTEGER;
BEGIN
CASE fdwReason OF
|DLL_PROCESS_ATTACH:
res := 1
|DLL_THREAD_ATTACH:
res := 0;
IF dll.thread_attach # NIL THEN
dll.thread_attach(hinstDLL, fdwReason, lpvReserved)
END
|DLL_THREAD_DETACH:
res := 0;
IF dll.thread_detach # NIL THEN
dll.thread_detach(hinstDLL, fdwReason, lpvReserved)
END
|DLL_PROCESS_DETACH:
res := 0;
IF dll.process_detach # NIL THEN
dll.process_detach(hinstDLL, fdwReason, lpvReserved)
END
ELSE
res := 0
END
RETURN res
END _dllentry;
PROCEDURE SetDll* (process_detach, thread_detach, thread_attach: DLL_ENTRY);
BEGIN
dll.process_detach := process_detach;
dll.thread_detach := thread_detach;
dll.thread_attach := thread_attach
END SetDll;
PROCEDURE [stdcall] _exit* (code: INTEGER);
BEGIN
API.exit(code)
END _exit;
PROCEDURE [stdcall] _init* (modname: INTEGER; typesc, _types: INTEGER; code, param: INTEGER);
BEGIN
SYSTEM.CODE(09BH, 0DBH, 0E3H); (* finit *)
API.init(param, code);
types := _types;
name := modname;
dll.process_detach := NIL;
dll.thread_detach := NIL;
dll.thread_attach := NIL;
END _init;
END RTL.