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Translate C++ to DELPHI

Posted on 2009-05-05
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Last Modified: 2012-05-06
Hi experts (:
i want translate this code to delphi please.
thank you.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
 
#define DELTA     0x4;
 
void Encrypt(LPSTR lpBuffer, DWORD dwLen)
{
  DWORD i;
     
     if(!lpBuffer || !dwLen)
        return;
     
     for(i = 0; i < dwLen; i++)
      {
         lpBuffer[i] += DELTA;
      }
}
 
void Decrypt(LPSTR lpBuffer, DWORD dwLen)
{
  DWORD i;
     
     if(!lpBuffer || !dwLen)
        return;
     
     for(i = 0; i < dwLen; i++)
      {
         lpBuffer[i] -= DELTA;
      }
}
 
int main(int argc, char ** argv)
{ 
  char Buffer[256] = {0}; 
  int  BufferLen;
     
     if(argc < 2)
        return 1;
     
     BufferLen = strlen(argv[1]);
     
     if(BufferLen >= sizeof(Buffer))
        return 1;
        
     memcpy(Buffer, argv[1], BufferLen);
     Encrypt(Buffer, BufferLen);
     
     system("cls");
     printf("String: %s", Buffer);
     
     getchar(); 
 
  return 1;
}
 
 
 
 
 
 
 
// next \\
 
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
 
#define DELTA     0x4;
 
void Encrypt(LPSTR lpBuffer, DWORD dwLen)
{
  DWORD i;
     
     if(!lpBuffer || !dwLen)
        return;
     
     for(i = 0; i < dwLen; i++)
      {
         lpBuffer[i] += DELTA;
      }
}
 
void Decrypt(LPSTR lpBuffer, DWORD dwLen)
{
  DWORD i;
     
     if(!lpBuffer || !dwLen)
        return;
     
     for(i = 0; i < dwLen; i++)
      {
         lpBuffer[i] -= DELTA;
      }
}
 
int main(int argc, char ** argv)
{ 
  char Buffer[256] = {0}; 
  int  BufferLen;
     
     if(argc < 2)
        return 1;
     
     BufferLen = strlen(argv[1]);
     
     if(BufferLen >= sizeof(Buffer))
        return 1;
        
     memcpy(Buffer, argv[1], BufferLen);
     Decrypt(Buffer, BufferLen);
     
     system("cls");
     printf("String: %s", Buffer);
     
     getchar(); 
 
  return 1;
}

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Question by:MelissaCandyGirl
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3 Comments
 
LVL 26

Assisted Solution

by:Russell Libby
Russell Libby earned 200 total points
ID: 24307223
I am only doing one project example, because the only diff between the 2 is that one decrypts and the other encrypts. Basically a one line change.

Delphi source for console app:

program Project1;
{$APPTYPE CONSOLE}
uses
  Windows,
  SysUtils;

const
  DELTA             =  $04;

procedure Encrypt(lpBuffer: PChar; dwLen: DWORD);
var  i:          DWORD;
begin

  if (Assigned(lpBuffer) and (dwLen > 0)) then
  begin
     for i:=0 to Pred(dwLen) do
     begin
        lpBuffer[i]:=Chr(Byte(lpBuffer[i]) + DELTA);
     end;
  end;

end;

procedure Decrypt(lpBuffer: PChar; dwLen: DWORD);
var  i:          DWORD;
begin

  if (Assigned(lpBuffer) and (dwLen > 0)) then
  begin
     for i:=0 to Pred(dwLen) do
     begin
        lpBuffer[i]:=Chr(Byte(lpBuffer[i]) - DELTA);
     end;
  end;

end;

procedure ReadKey;
var  lpInput:       INPUT_RECORD;
     dwRead:        DWORD;
begin

  // Clear struct
  System.FillChar(lpInput, SizeOf(KEY_EVENT_RECORD), 0);

  // Read one keystroke from the input buffer
  while ReadConsoleInput(GetStdHandle(STD_INPUT_HANDLE), lpInput, 1, dwRead) do
  begin
     // Ensure that it is a key up event
     if (lpInput.EventType = KEY_EVENT) and not(lpInput.Event.KeyEvent.bKeyDown) then
     begin
        // Done processing
        break;
     end;
     // Clear struct
     System.FillChar(lpInput, SizeOf(KEY_EVENT_RECORD), 0);
  end;

end;

procedure ClearScreen;
var  cbi:           CONSOLE_SCREEN_BUFFER_INFO;
     coScreen:      COORD;
     dwWrite:       DWORD;
begin

  // Set new cursor's starting position
  System.FillChar(coScreen, SizeOf(coScreen), 0);

  // Get screen buffer info
  if GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), cbi) then
  begin
     // Fill the entire screen with blanks
     FillConsoleOutputCharacter(GetStdHandle(STD_OUTPUT_HANDLE), #32, cbi.dwSize.X * cbi.dwSize.Y, coScreen, dwWrite);
     // Position the cursor
     SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coScreen);
  end;

end;

var
  Buffer:           Array [0..255] of Char;
  BufferLen:        Integer;
  Arg:              String;

begin

  FillChar(Buffer, SizeOf(Buffer), 0);

  if (ParamCount < 1) then
     ExitCode:=1
  else
  begin
     Arg:=ParamStr(1);
     BufferLen:=Length(Arg);
     if (BufferLen >= SizeOf(Buffer)) then
        ExitCode:=1
     else
     begin
        Move(Pointer(Arg)^, Buffer, BufferLen);

        // The only difference between the two projects is calling encrypt / decrypt
        //    Encrypt(@Buffer, BufferLen);
        //    Decrypt(@Buffer, BufferLen);

        Encrypt(@Buffer, BufferLen);

        // Clear the screen
        ClearScreen;

        // Dump the string
        Write(Format('String: %s', [Buffer]));

        // Wait for key
        ReadKey;

        // Done
        ExitCode:=1;

     end;
  end;

end.

----

Regards,
Russell

0
 
LVL 13

Accepted Solution

by:
ThievingSix earned 300 total points
ID: 24307357

program Q_24381988;
 
{$APPTYPE CONSOLE}
 
uses
  Windows;
 
const
  DELTA = $4;
 
procedure Encrypt(var Buffer: String; Length: DWORD);
var
  I : DWORD;
begin
  If (Buffer = '') Or (Length <= 0) Then Exit;
  For I := 1 To Length Do
    begin
    Buffer[I] := Char(Byte(Buffer[I]) + DELTA);
  end;
end;
 
procedure Decrypt(var Buffer: String; Length: DWORD);
var
  I : DWORD;
begin
  If (Buffer = '') Or (Length <= 0) Then Exit;
  For I := 1 To Length Do
    begin
    Buffer[I] := Char(Byte(Buffer[I]) - DELTA);
  end;
end;
 
var
  Output : String;
  BufferLen : Integer;
begin
  If ParamCount < 1 Then Exit;
  BufferLen := Length(ParamStr(1));
  If BufferLen >= 256 Then Exit;
  Output := ParamStr(1);
  SetLength(Output,BufferLen);
  Encrypt(Output,BufferLen);
  Writeln('String: ' + Output);
  Readln;
end.
 
 
// next \\
 
 
program Q_24381988_2;
 
{$APPTYPE CONSOLE}
 
uses
  Windows;
 
const
  DELTA = $4;
 
procedure Encrypt(var Buffer: String; Length: DWORD);
var
  I : DWORD;
begin
  If (Buffer = '') Or (Length <= 0) Then Exit;
  For I := 1 To Length Do
    begin
    Buffer[I] := Char(Byte(Buffer[I]) + DELTA);
  end;
end;
 
procedure Decrypt(var Buffer: String; Length: DWORD);
var
  I : DWORD;
begin
  If (Buffer = '') Or (Length <= 0) Then Exit;
  For I := 1 To Length Do
    begin
    Buffer[I] := Char(Byte(Buffer[I]) - DELTA);
  end;
end;
 
var
  Output : String;
  BufferLen : Integer;
begin
  If ParamCount < 1 Then Exit;
  BufferLen := Length(ParamStr(1));
  If BufferLen >= 256 Then Exit;
  Output := ParamStr(1);
  SetLength(Output,BufferLen);
  Decrypt(Output,BufferLen);
  Writeln('String: ' + Output);
  Readln;
end.

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Author Closing Comment

by:MelissaCandyGirl
ID: 31578102
thank you (:
kisses
0

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