| 1 | unit TargetPython;
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| 2 |
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| 3 | interface
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| 4 |
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| 5 | uses
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| 6 | Classes, SysUtils, Target, BFTarget;
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| 7 |
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| 8 | type
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| 9 |
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| 10 | { TTargetPython }
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| 11 |
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| 12 | TTargetPython = class(TBFTarget)
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| 13 | private
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| 14 | function GetMemoryCell: string;
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| 15 | public
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| 16 | constructor Create; override;
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| 17 | procedure Compile; override;
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| 18 | procedure Run; override;
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| 19 | end;
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| 20 |
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| 21 |
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| 22 | implementation
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| 23 |
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| 24 | { TTargetPython }
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| 25 |
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| 26 | constructor TTargetPython.Create;
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| 27 | begin
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| 28 | inherited;
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| 29 | FName := 'Python';
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| 30 | FSourceExtension := '.py';
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| 31 | FRunExtension := '.py';
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| 32 | FCompiledExtension := '.py';
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| 33 | FImageIndex := 26;
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| 34 | FCapabilities := [tcCompile, tcRun];
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| 35 | {$IFDEF WINDOWS}
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| 36 | CompilerPath := '';
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| 37 | ExecutorPath := 'c:\Program Files\Python\python.exe';
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| 38 | {$ENDIF}
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| 39 | {$IFDEF UNIX}
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| 40 | CompilerPath := '';
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| 41 | ExecutorPath := '/usr/bin/python';
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| 42 | {$ENDIF}
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| 43 | end;
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| 44 |
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| 45 | function TTargetPython.GetMemoryCell: string;
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| 46 | begin
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| 47 | Result := 'memory[position';
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| 48 | if FProgram[FProgramIndex].RelIndex > 0 then
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| 49 | Result := Result + ' + ' + IntToStr(FProgram[FProgramIndex].RelIndex)
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| 50 | else if FProgram[FProgramIndex].RelIndex < 0 then
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| 51 | Result := Result + ' - ' + IntToStr(Abs(FProgram[FProgramIndex].RelIndex));
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| 52 | Result := Result + ']';
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| 53 | end;
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| 54 |
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| 55 | procedure TTargetPython.Compile;
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| 56 | begin
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| 57 | inherited;
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| 58 | Indent := 0;
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| 59 | FTargetCode := '';
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| 60 |
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| 61 | AddLine('# ' + ProgramName);
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| 62 | AddLine('');
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| 63 | AddLine('class _Getch:');
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| 64 | AddLine(' """Gets a single character from standard input. Does not echo to the screen."""');
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| 65 | AddLine(' def __init__(self):');
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| 66 | AddLine(' try:');
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| 67 | AddLine(' self.impl = _GetchWindows()');
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| 68 | AddLine(' except ImportError:');
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| 69 | AddLine(' self.impl = _GetchUnix()');
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| 70 | AddLine('');
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| 71 | AddLine(' def __call__(self): return self.impl()');
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| 72 | AddLine('');
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| 73 | AddLine('');
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| 74 | AddLine('class _GetchUnix:');
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| 75 | AddLine(' def __init__(self):');
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| 76 | AddLine(' import tty, sys');
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| 77 | AddLine('');
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| 78 | AddLine(' def __call__(self):');
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| 79 | AddLine(' import sys, tty, termios');
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| 80 | AddLine(' fd = sys.stdin.fileno()');
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| 81 | AddLine(' old_settings = termios.tcgetattr(fd)');
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| 82 | AddLine(' try:');
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| 83 | AddLine(' tty.setraw(sys.stdin.fileno())');
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| 84 | AddLine(' ch = sys.stdin.read(1)');
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| 85 | AddLine(' finally:');
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| 86 | AddLine(' termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)');
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| 87 | AddLine(' return ch');
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| 88 | AddLine('');
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| 89 | AddLine('');
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| 90 | AddLine('class _GetchWindows:');
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| 91 | AddLine(' def __init__(self):');
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| 92 | AddLine(' import msvcrt');
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| 93 | AddLine('');
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| 94 | AddLine(' def __call__(self):');
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| 95 | AddLine(' import msvcrt');
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| 96 | AddLine(' return msvcrt.getch()');
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| 97 | AddLine('');
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| 98 | AddLine('getchar = _Getch()');
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| 99 | AddLine('');
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| 100 | AddLine('import sys');
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| 101 | AddLine('memory = [0] * ' + IntToStr(MemorySize));
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| 102 | AddLine('position = 0');
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| 103 | FProgramIndex := 0;
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| 104 | while FProgramIndex < FProgram.Count do begin
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| 105 | case FProgram[FProgramIndex].Command of
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| 106 | cmPointerInc: AddLine('position += ' + IntToStr(FProgram[FProgramIndex].Parameter));
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| 107 | cmPointerDec: AddLine('position -= ' + IntToStr(FProgram[FProgramIndex].Parameter));
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| 108 | cmInc: AddLine(GetMemoryCell + ' += ' + IntToStr(FProgram[FProgramIndex].Parameter));
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| 109 | cmDec: AddLine(GetMemoryCell + ' -= ' + IntToStr(FProgram[FProgramIndex].Parameter));
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| 110 | cmOutput: begin
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| 111 | AddLine('sys.stdout.write(chr(' + GetMemoryCell + '))');
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| 112 | AddLine('sys.stdout.flush()');
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| 113 | end;
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| 114 | cmInput: AddLine(GetMemoryCell + ' = ord(getchar())');
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| 115 | cmSet: AddLine(GetMemoryCell + ' = ' + IntToStr(FProgram[FProgramIndex].Parameter));
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| 116 | cmMultiply: AddLine(GetMemoryCell + ' = ' + GetMemoryCell + ' + memory[position] * ' + IntToStr(FProgram[FProgramIndex].Parameter) + ';');
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| 117 | cmLoopStart: begin
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| 118 | AddLine('while(' + GetMemoryCell + ' != 0):');
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| 119 | Inc(Indent);
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| 120 | end;
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| 121 | cmLoopEnd: begin
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| 122 | Dec(Indent);
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| 123 | end;
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| 124 | end;
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| 125 | Inc(FProgramIndex);
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| 126 | end;
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| 127 |
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| 128 | CompileToFile;
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| 129 | end;
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| 130 |
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| 131 | procedure TTargetPython.Run;
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| 132 | begin
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| 133 | inherited;
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| 134 | RunFromFile;
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| 135 | end;
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| 136 |
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| 137 | end.
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| 138 |
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