Delphi中Move、CopyMemory操作

字串转字节数组

一、CopyMemory　　

var
  s:PAnsiChar;
  ary:TArray<Byte>;
  bt:Byte;
begin
  s:='Form Delphi';
  SetLength(ary,Length(string(s))+);
  CopyMemory(ary,s,Length(s));
  mmo1.Clear;
  for bt in ary do
  begin
     mmo1.Lines.Append(Chr(bt));
  end;
end;

二、Move

var
  s:PAnsiChar;
  pb:PByte;
  i:Byte;
begin
  s:='From Delphi';
  GetMem(pb,Length(string(s))+);
  Move(s^,pb^,Length(string(s))+);
  mmo1.Clear;
  {$POINTERMATH ON}
  for i:= to Length(string(s)) do
  begin
    mmo1.Lines.Append(Chr(pb[i]));
  end;
  {$POINTERMATH OFF}
  FreeMem(pb,Length(string(s))+);
end;

三、Move

var
  s:PAnsiChar;
  pb:PByte;
  i:Byte;
begin
  s:='From Delphi';
  GetMem(pb,Length(string(s))+);
  Move(s^,pb^,Length(string(s))+);
  mmo1.Clear;
  i:=;
  while (pb^<>Ord(#)) do
  begin
    mmo1.Lines.Append(Chr(pb^));
    Inc(pb);
    Inc(i);
  end;
    Dec(pb,i);
  FreeMem(pb,Length(string(s))+);
end;