mfc, MFC ActiveX newb needs a little help (Crossposted from ms.public.vc.mfcole)

1. Lets create comp.microsoft.public.vc.mfc or alt.microsoft.public.vc.mfc

2. New to C++ and Need a little help with a public domain program

Hi,

I am new C++ and need a little help with a public domain program that
is suppose to perform a byte swap. I am receiving the following error
messages during the compile process with Microsoft C++ 2003.

Here are the error messages and source code:


(97) : error C2664: 'fgetpos' : cannot convert parameter 2 from 'void
*' to 'fpos_t *'

Conversion from 'void*' to pointer to non-'void' requires an explicit
cast

(99) : error C2440: '=' : cannot convert from 'void *' to 'unsigned
char *'

Conversion from 'void*' to pointer to non-'void' requires an explicit
cast


Here is the source:

/*
 * swap Version 0.0
 * Bart Trzynadlowski, October 27, 2000
 * Public domain
 *
 * June 11, 2001:
 *      - Updated contact information
 * 
 *
 * This program swaps the bytes, words, doublewords, or quadwords in
files.
 *
 * Usage:   swap <-b files, -w files, -d files, -q files>
 * Options: -?,-h   Show help
 *          -b      Byte swap (8-bit) [default]
 *          -w      Word swap (16-bit)
 *          -d      Doubleword swap (32-bit)
 *          -q      Quadword swap (64-bit)
 *
 * Contact Bart Trzynadlowski:
 *  Email:  XXXX@XXXXX.COM 
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int         swap_type = 0;  /* 0=byte, 1=word, 2=dword, 3=qword */
unsigned    mask[] = { 0, 1, 3, 7 };
unsigned    data_sz[] = { 1, 2, 4, 8 };
char        *type_l[] = { "byte", "word", "doubleword", "quadword" };
char        *type_u[] = { "Byte", "Word", "Doubleword", "Quadword" };


void Swap(unsigned char *buffer, unsigned size, char *file)
{
    unsigned        i, j;
    unsigned char   d[8];

    if (size & mask[swap_type])
    {
        fprintf(stderr, "swap: File cannot be %s-swapped: %s (%d
bytes)\n",
                type_l[swap_type], file, size);
        return;
    }

    printf("swap: %s-swapping file: %s (%d bytes)... ",
type_u[swap_type],
           file, size);
    for (i = 0; i < size; i += (data_sz[swap_type] * 2))
    {
        for (j = 0; j < data_sz[swap_type]; j++)
            d[j] = buffer[i + j];
        for (j = 0; j < data_sz[swap_type]; j++)
            buffer[i + j] = buffer[i + j + data_sz[swap_type]];
        for (j = 0; j < data_sz[swap_type]; j++)
            buffer[i + j + data_sz[swap_type]] = d[j];
    }
    printf("OK\n");
}

void ShowHelp()
{
    printf("swap Version 0.0 by Bart Trzynadlowski: Data-Swapping
Utility\n");
    printf("Usage:      swap <-b files, -w files, -d files, -q
files>\n");
    printf("Options:    -?,-h   Show this help text\n");
    printf("            -b      Swap bytes [default]\n");
    printf("            -w      Swap words\n");
    printf("            -d      Swap doublewords\n");
    printf("            -q      Swap quadwords\n");
    exit(0);
}

int main(int argc, char **argv)
{
    FILE            *fp;
    unsigned char   *buffer;
    unsigned        i, j;

    if (argc <= 1)
        ShowHelp();

    setvbuf(stdout, NULL, _IONBF, NULL); 

    for (i = 1; i < argc; i++)
    {
        if (!strcmp(argv[i], "-?") || !strcmp(argv[i], "-h"))  
ShowHelp();
           else if (!strcmp(argv[i], "-b"))    swap_type = 0;
           else if (!strcmp(argv[i], "-w"))    swap_type = 1;
           else if (!strcmp(argv[i], "-d"))    swap_type = 2;
           else if (!strcmp(argv[i], "-q"))    swap_type = 3;
        else
        {
            if ((fp = fopen(argv[i], "rb+")) == NULL)
                fprintf(stderr, "swap: Failed to open file: %s\n",
argv[i]);
                else
            {
                fseek(fp, 0, SEEK_END);
ERROR HERE->    fgetpos(fp, (void *) &j);
                rewind(fp);
ERROR HERE->    if ((buffer = calloc(j, sizeof(unsigned char))) ==
NULL)
                    fprintf(stderr, "swap: Failed to allocate %d bytes
of "
                                    "memory for file: %s\n", j,
argv[i]);
                else
                {
                    fread(buffer, sizeof(unsigned char), j, fp);
                    rewind(fp);
                    Swap(buffer, j, argv[i]);
                    fwrite(buffer, sizeof(unsigned char), j, fp);
                    free(buffer);
                }
                fclose(fp);
            }
        }
    }

    setvbuf(stdout, NULL, _IOLBF, NULL);

    return 0;
}

Any information would would be greatly appreciated.

Thanks,

3. Questions on ms dropTarget and vc debuger,need your help

4. Visual C++ 7.1 INTERNAL COMPILER ERROR -- crossposted clc++ and microsoft.public.vstudio.general

// As usual the error message directs one to the report the bug.
//
// And as usual there is absolutely no way to do so without paying for
// the privilege...
//
// Or using three or four hours to find the _current_ reporting page...
//
// Since I'm now using much time on reporting this compiler bug, please
// do also fix the __LINE__ macro.
//
// It does not work with some compiler options, which means e.g. Andrei
// Alexandrescu's ScopeGuard does not compile with this compiler.


#include    <vector>
#include    <iostream>

template< typename T, size_t N >
struct ArrayHolder
{
    T elem[N];
};

template< typename T >
class VectorImpl
{
private:
    std::vector<T> elem;
public:
    template< size_t N >
    VectorImpl( T const (&values)[N] ): elem( values, values+N ) {}

    T& operator[]( size_t i ){ return elem.at( i ); }
    T const& operator[]( size_t i ) const { return elem.at( i ); }
};

template< typename T >
class Vector: public VectorImpl< T >
{
public:
    template< size_t N >

    // This is a bug.  It causes a compiler crash.  That is, an ICE.
    VectorImpl( T const (&values)[N] ): VectorImpl( values ) {}
};

int main()
{
    typedef ArrayHolder<double, 6>  DoubleArray6;
    static DoubleArray6 const   x           = { 10, 20, 30, 40, 50, 60 };
    static DoubleArray6 const   xArray[]    = { x };

    Vector<DoubleArray6> v( xArray );
    for( size_t i = 0; i < 6; ++i )
    {
        std::cout << v[0].elem[i] << std::endl;
    }
}

-- 
A: Because it messes up the order in which people normally read text.
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