Metafiles

[vbgladiator]

Hey,

I have the following code.

#include <stdio.h>
#include <iostream.h>


#include "resource.h"

short ReadMetaInt( istream& is, UINT& ints_read);

int Metas[1] = {JVEST01C};
HRSRC reshandle;
HMODULE hexe;
HGLOBAL hglobal;

int main()
{
   printf("1st element: %d\n", Metas[0]);


   hexe = GetModuleHandle(NULL);
   reshandle = FindResource(hexe, MAKEINTRESOURCE(Metas[0]), "Metafile");
   if (reshandle == NULL)
       printf("Did not find resource.\n");
   else
       printf("reshandle: %d\n", reshandle);
   hglobal = LoadResource(hexe, reshandle);
   if (hglobal == NULL)
       printf("Did not load resource\n");
   else
       printf("hglobal: %d\n", hglobal);
   //istream* metastream = (istream*) LockResource(hglobal);
   istream *metastream = (istream*) LockResource(hglobal);
   if (metastream == NULL)
       printf("could not lock resource\n");

   UINT ints_read = 0;
   int blah = ReadMetaInt(*metastream, ints_read);
   cout << blah;
   system("PAUSE");
   return 100;
}

// ---------------------------------------------------------------------------------------------

// Read an integer from metafile.
short ReadMetaInt( istream& is, UINT& ints_read )
{
   unsigned char c1, c2;
   is.get( c1 );
   is.get( c2 );
   ints_read++;
   return( c1 + ( c2 << 8 ) );
} // ReadMetaInt

I basically have to open a metafile which is stored as a resource. I have to pass it into the ReadMetaInt function as istream. This used to open the metafile from a physical file on teh hard drive. I want to be able to open them as resources and then pass them into that function.

Right now, I get errors on the is.get(c1) line.

[CornedBee]

You cannot just cast a pointer to a memory area filled more or less with random values to a pointer to a class object and expect it to work. This is not what I meant with writing a streambuffer.
May I recommend the book "Standard C++ IOStreams and Locales" by Langer and Kreft to you?

[vbgladiator]

you most certainly can.
I really like C++ but man is it a big change from VB.
I guess I should have learned C first, then VB. he he
Any tutorials online that any of you guys know about?

Thanks,

[CornedBee]

Well, I'm writing one, but it's been stalled for a long time, and what's there I think you already know.

See top of the forum.