array <Byte>^ to unsigned char*

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  • zon7mail@gmail.com
    #1

    array <Byte>^ to unsigned char*

    I've two functions. One is managed and receives an array, and the other
    is unmanaged and receives a pointer, just like this
    class A
    {
    int Foo(unsigned char* m){};
    ...
    }

    ref class B
    {
    int Boo(array< Byte >^ n){};
    ...
    }

    Is there anyway to call the function Foo from Boo passing n directly?

    Tags: None
    • Carl Daniel [VC++ MVP]
      #2
      Re: array &lt;Byte&gt; ^ to unsigned char*

      zon7mail@gmail. com wrote:
      I've two functions. One is managed and receives an array, and the
      other is unmanaged and receives a pointer, just like this
      class A
      {
      int Foo(unsigned char* m){};
      ...
      }
      >
      ref class B
      {
      int Boo(array< Byte >^ n){};
      ...
      }
      >
      Is there anyway to call the function Foo from Boo passing n directly?
      Yes. Get a pin_ptr<Bytetha t references the first byte of n and pass it to
      Foo

      using namespace System;

      struct A
      {
      int Foo(unsigned char* m)
      {
      return *m;
      }
      };

      ref class B
      {
      A* m_pA;
      int Boo(array< Byte >^ n)
      {
      pin_ptr<unsigne d charpn = &n[0];
      return m_pA->Foo(pn);
      }
      };

      -cd


        Comment

        • Barry Kelly
          #3
          Re: array &lt;Byte&gt; ^ to unsigned char*

          zon7mail@gmail. com wrote:
          I've two functions. One is managed and receives an array, and the other
          is unmanaged and receives a pointer, just like this
          class A
          {
          int Foo(unsigned char* m){};
          ...
          }
          >
          ref class B
          {
          int Boo(array< Byte >^ n){};
          ...
          }
          >
          Is there anyway to call the function Foo from Boo passing n directly?
          Google Search
          http://www.google.com/search?q=how+to+obtain+pointer+to+byte+array


          -- Barry

          --
          Entropy Overload
          http://barrkel.blogspot.com/

            Comment

            • Paul E Collins
              #4
              Re: array &lt;Byte&gt; ^ to unsigned char*

              zon7mail@gmail. com wrote:
              int Boo(array< Byte >^ n){};
              Can someone tell me what this ^ means? I'm still using the C# 1.x
              compiler (occasionally 2.x) and I only know ^ as the exclusive-or
              operator.

              Eq.


                Comment

                • Carl Daniel [VC++ MVP]
                  #5
                  Re: array &lt;Byte&gt; ^ to unsigned char*

                  Paul E Collins wrote:
                  zon7mail@gmail. com wrote:
                  >
                  >int Boo(array< Byte >^ n){};
                  >
                  Can someone tell me what this ^ means? I'm still using the C# 1.x
                  compiler (occasionally 2.x) and I only know ^ as the exclusive-or
                  operator.
                  This questsion was misposted - it's about C++/CLI, where the ^ operator is
                  used to derefence a "tracking pointer". It's roughly analogous to the '.'
                  in C# between an object reference and a member name.

                  -cd


                    Comment

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