Execute Brain****: Difference between revisions
Fix pascal version to run in delphi
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MaiconSoft (talk | contribs) (Fix pascal version to run in delphi) |
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[[/D|Implementation in D]].
=={{header|Delphi}}==
{{libheader| Winapi.Windows}}
{{libheader| System.SysUtils}}
{{Trans|Pascal}}
Fix of [[#Pascal]] to run in Delphi.
<lang Delphi>
program Execute_Brain;
{$APPTYPE CONSOLE}
uses
Winapi.Windows,
System.SysUtils;
const
DataSize = 1024; // Size of Data segment
MaxNest = 1000; // Maximum nesting depth of []
function Readkey: Char;
var
InputRec: TInputRecord;
NumRead: Cardinal;
KeyMode: DWORD;
StdIn: THandle;
begin
StdIn := GetStdHandle(STD_INPUT_HANDLE);
GetConsoleMode(StdIn, KeyMode);
SetConsoleMode(StdIn, 0);
repeat
ReadConsoleInput(StdIn, InputRec, 1, NumRead);
if (InputRec.EventType and KEY_EVENT <> 0) and InputRec.Event.KeyEvent.bKeyDown then
begin
if InputRec.Event.KeyEvent.AsciiChar <> #0 then
begin
Result := InputRec.Event.KeyEvent.UnicodeChar;
Break;
end;
end;
until FALSE;
SetConsoleMode(StdIn, KeyMode);
end;
procedure ExecuteBF(Source: string);
var
Dp: pByte; // Used as the Data Pointer
DataSeg: Pointer; // Start of the DataSegment (Cell 0)
Ip: pChar; // Used as instruction Pointer
LastIp: Pointer; // Last adr of code.
JmpStack: array[0..MaxNest - 1] of pChar; // Stack to Keep track of active "[" locations
JmpPnt: Integer; // Stack pointer ^^
JmpCnt: Word; // Used to count brackets when skipping forward.
begin
// Set up then data segment
getmem(DataSeg, dataSize);
Dp := DataSeg;
// fillbyte(dp^,dataSize,0);
FillChar(Dp^, DataSize, 0);
// Set up the JmpStack
JmpPnt := -1;
// Set up Instruction Pointer
Ip := @Source[1];
LastIp := @Source[length(Source)];
if Ip = nil then
exit;
// Main Execution loop
repeat { until Ip > LastIp }
case Ip^ of
'<':
dec(Dp);
'>':
inc(Dp);
'+':
inc(Dp^);
'-':
dec(Dp^);
'.':
write(chr(Dp^));
',':
Dp^ := ord(ReadKey);
'[':
if Dp^ = 0 then
begin
// skip forward until matching bracket;
JmpCnt := 1;
while (JmpCnt > 0) and (Ip <= LastIp) do
begin
inc(Ip);
case Ip^ of
'[':
inc(JmpCnt);
']':
dec(JmpCnt);
#0:
begin
Writeln('Error brackets don''t match');
halt;
end;
end;
end;
end
else
begin
// Add location to Jump stack
inc(JmpPnt);
JmpStack[JmpPnt] := Ip;
end;
']':
if Dp^ > 0 then
// Jump Back to matching [
Ip := JmpStack[JmpPnt]
else // Remove Jump from stack
dec(JmpPnt);
end;
inc(Ip);
until Ip > LastIp;
freemem(DataSeg, dataSize);
end;
const
HelloWorldWiki = '++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>' +
'---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.';
pressESCtoCont = '>[-]+++++++[<++++++++++>-]<->>[-]+++++++[<+++++++++++' +
'+>-]<->>[-]++++[<++++++++>-]+>[-]++++++++++[<++++++++' +
'++>-]>[-]++++++++[<++++++++++++++>-]<.++.+<.>..<<.<<.' +
'-->.<.>>.>>+.-----.<<.[<<+>>-]<<.>>>>.-.++++++.<++++.' +
'+++++.>+.<<<<++.>+[>+<--]>++++...';
waitForEsc = '[-]>[-]++++[<+++++++>-]<->[-]>+[[-]<<[>+>+<<-]' + '>>[<' +
'<+>>-],<[->-<]>]';
begin
// Execute "Hello World" example from Wikipedia
ExecuteBF(HelloWorldWiki);
// Print text "press ESC to continue....." and wait for ESC to be pressed
ExecuteBF(pressESCtoCont + waitForEsc);
end.</lang>
=={{header|dodo0}}==
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