Am 28.02.2012 08:22, schrieb Michael Schnell:
On 02/27/2012 09:51 PM, Martin Schreiber wrote:
A side mark: I don't think using the old ansistring as combined binary
and character buffer is such a bad thing.
+ 1/2
It would be better to have a type that 1:1 allows for all the well known
string operations, replacing "Character" by "Byte":
MyByte := MyByteString[n]
MyByteString := MyByteString + MyByte;
MyByteString2 := copy(MyByteString, 10, 100);
p:= pos(MyByteString2, MyByteString)
MyByteString := MyByteString + MyByteString2;
...
In my projects I usually do something like "Type ByteString =
AnsiString" for a future migration :) .
You know that this is already possible in FPC?
=== source begin ===
program bytearraytest;
{$mode objfpc}
type
TByteArray = array of Byte;
operator + (aLeft, aRight: TByteArray): TByteArray;
begin
SetLength(Result, Length(aLeft) + Length(aRight));
if Length(aLeft) > 0 then
Move(aLeft[0], Result[0], Length(aLeft) * SizeOf(Byte));
if Length(aRight) > 0 then
Move(aRight[0], Result[Length(aLeft)], Length(aRight) * SizeOf(Byte));
end;
var
arr1, arr2, arr3: TByteArray;
b: Byte;
i: LongInt;
begin
SetLength(arr1, 5);
for i := 0 to 4 do
arr1[i] := i + 1;
SetLength(arr2, 5);
for i := 0 to 4 do
arr2[i] := i + 6;
arr3 := arr1 + arr2;
for b in arr3 do
Write(b, ' ');
Writeln;
arr3 := Copy(arr2, 2, 2);
for b in arr3 do
Write(b, ' ');
Writeln;
end.
=== source end ===
=== output begin ===
PS P:\tests\oneshots> .\bytearraytest.exe
1 2 3 4 5 6 7 8 9 10
8 9
=== output end ===
I only didn't implement Pos, but as this does not use any compiler magic
you can do that yourself ;)
Regards,
Sven
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