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David Heffernan

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Everything posted by David Heffernan

  1. David Heffernan
    Using packages would achieve that
  2. David Heffernan
    If you really want to reduce the size of what you deploy then use runtime packages instead of DLLs and you won't duplicate RTL/VCL classes. Likely that would save you far more than you would save by stripping RTTI in the RTL/VCL code that you link, were it even possible for you to do that.
  3. David Heffernan
    Why would it be duplicated? Why would the same RTTI be found in different DLLs? Why are you singling out the RTTI here? Isn't the fundamental issue that you have duplicated code. If the duplication of the code bothers you, don't have duplicated code. And guess what. You then won't have duplicated RTTI. Or am I missing something?
  4. David Heffernan
    Why does it make a difference whether or not the code is in a DLL?
  5. David Heffernan
    @Stefan Glienke is not suggesting that you use a class method. He's just pointing out that the title of this topic is misleading.
  6. David Heffernan
    You can read the documentation to find out: http://docwiki.embarcadero.com/RADStudio/Sydney/en/Methods_(Delphi)#Class_Methods
  7. David Heffernan
    I don't think RTTI doubles or triples the size of your executables. I also think that people worry overly about the size of the executables. Certainly worry about this on mobile platforms, but generally on desktop platforms you should be less concerned of the increases due to RTTI.
  8. David Heffernan
    Presumably it's because of your RTTI settings, which by default allow public methods to be called from RTTI, but not private.
  9. David Heffernan
    Timsort is stable, and performs well on partially ordered data. It's the default sort for Python and Java.
  10. David Heffernan

    Accessing the memory of a Python List

    David Heffernan replied to fjames's topic in Python4Delphi

    As I read the documentation, I think you are right. Well done. On the home straight now. As I said, this is fundamentally a numpy issue. No doubt a numpy expert would have been aware of this.
  11. David Heffernan

    Accessing the memory of a Python List

    David Heffernan replied to fjames's topic in Python4Delphi

    No. Python buffer API gives you access to the internal buffer of Python objects. Pass that to Delphi and have your delphi code populate it.
  12. David Heffernan

    Accessing the memory of a Python List

    David Heffernan replied to fjames's topic in Python4Delphi

    It seems odd to me that you won't use the solution that I outlined above which is known to work. But if you won't entertain that then you are probably asking in the wrong place. Because what you are asking is really a numpy question. I'd ask the question on SO and tag it python and numpy. Doesn't matter at all that the array is from Delphi. It's just an array of double.
  13. David Heffernan

    Accessing the memory of a Python List

    David Heffernan replied to fjames's topic in Python4Delphi

    You want to do more than this don't you. You want to use numpy methods with this shared data. Is that correct?
  14. David Heffernan

    Accessing the memory of a Python List

    David Heffernan replied to fjames's topic in Python4Delphi

    What @fjames wants to do in Python is to use numpy without copying data between Delphi and Python. Are you aware of a way to do this with numpy that I have missed?
  15. David Heffernan

    Accessing the memory of a Python List

    David Heffernan replied to fjames's topic in Python4Delphi

    I don't think there's an easy way to get numpy to use your raw array memory. My initial suggestion, I suspect, is the only tractable way to do this without copying.
  16. David Heffernan

    Reading fields with different lenghts

    David Heffernan replied to AndrewHoward's topic in Delphi IDE and APIs

    Beyond the compilation error which is just a typo, pointless to zeroise the record and then write over those zeros.
  17. David Heffernan

    Accessing the memory of a Python List

    David Heffernan replied to fjames's topic in Python4Delphi

    Something can't be both a Delphi array and a numpy array. You should do what in said. Work with a numpy array's buffer. You'll access that as a pointer in Delphi. Use pointer math.
  18. David Heffernan

    Accessing the memory of a Python List

    David Heffernan replied to fjames's topic in Python4Delphi

    If you want to work with numpy, and minimise copying, then you create a numpy ndarray array object and use the buffer protocol to gain access to the object's internal buffer. Do all your work in Delphi using that internal buffer.
  19. David Heffernan

    Reading fields with different lenghts

    David Heffernan replied to AndrewHoward's topic in Delphi IDE and APIs

    If the fields are at known, fixed positions then you can read them directly. If not then you need to parse the data.
  20. David Heffernan

    IOTAProcess.ReadProcessMemory / .WriteProcessMemory

    David Heffernan replied to dummzeuch's topic in Delphi IDE and APIs

    Seems unlikely. The winapi functions return a BOOL and call SetLastError. HRESULT seems very implausible.
  21. David Heffernan

    IOTAProcess.ReadProcessMemory / .WriteProcessMemory

    David Heffernan replied to dummzeuch's topic in Delphi IDE and APIs

    That's called returning a value through a parameter. If you look at this function, what else could these integer return values hold?
  22. David Heffernan

    function reference feature for Delphi source code

    David Heffernan replied to Nasreddine's topic in GExperts

    By output I mean what is produced by the compiler.
  23. David Heffernan

    function reference feature for Delphi source code

    David Heffernan replied to Nasreddine's topic in GExperts

    I don't think so. I think that you don't seem to understand the requirement. You certainly can't achieve the functionality shown in the original post from a native executable file (like the ones that Delphi produce).
  24. David Heffernan

    function reference feature for Delphi source code

    David Heffernan replied to Nasreddine's topic in GExperts

    A map file doesn't list functions calls. You can't map the graph of function calls from a map file. Parsing isn't enough. You also need to interpret the tokens that the parser emits, using the syntax of the language. For sure you need a parser. But it's not enough. You need more.
  25. David Heffernan

    function reference feature for Delphi source code

    David Heffernan replied to Nasreddine's topic in GExperts

    No. You need way more than a map file to find all the incoming references to a function. This won't tell you the information either.
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