Re: Opening and closing directories - sorry

[Luis E. Cuadrado]

Hi Pete:
Thanks for the quick reply. I notice that you used MFC. Is that the only
way to deal with searching the whole hard drive? This means there is no way
to try to do it using STL? I really appreciate the code that you sent me.
I'm going to take a closer look at it. Looks kind of interesting. Again,
thank you and hope to hear from you soon.

have a nice day,
Luis E.



"Luis E. Cuadrado" luiscuadrado wrote:
>
>"Pete" <grandpete@hotmail.com> wrote:
>>
>>Hi Luis,
>>
>>Here's a little hack I wrote to read through directories on your hard drive.
>> I call it a "hack" because it uses printf() and its ilk for output rather
>>than cout because CStrings don't display correctly with cout on the version
>>of VC6 I'm running (haven't put in SP4 yet). Anyways, here it is.
>>Be sure to tell the compiler to use MFC in a shared library or you'll get
>>linker errors when you compile.
>>
>>Enjoy!
>>*****************
>>#include <afx.h>
>>#include <string>
>>#include <list>
>>using namespace std;
>>
>>class Filenames {
>>public:
>> CString Filename;
>>};
>>
>>void ShowDir(CString &Dir);
>>
>>void main()
>>{
>> // Be sure to use the double backslash between directories or
>> // the compiler will misinterpret them. Remember \\ resolves
>> // to a single \ when the string is compiled.
>> CString Dir = "C:\\Temp"; // Set this to some small test folder of yours.
>>
>> ShowDir(Dir);
>>}
>>
>>// How much should this directory be indented? Must be global.
>>int indent = -2;
>>
>>void ShowDir(CString &Dir)
>>{
>> Filenames Work;
>> list <Filenames> NameList;
>> list <Filenames>::const_iterator it;
>> int i;
>> CString tmp;
>> CFileFind finder;
>> BOOL bWorking;
>>
>> indent += 2;
>> bWorking = finder.FindFile(Dir + "\\*.*");
>> while(bWorking)
>> {
>> bWorking = finder.FindNextFile();
>> tmp = finder.GetFileName();
>> if(tmp != "." && tmp != "..") { // Ignore "." and ".." files
>> for(i = 0; i<indent; i++)
>> putchar(' ');
>> printf("%s",tmp);
>> if(finder.IsDirectory()) { // Lots of other methods available too.
>> Work.Filename = tmp;
>> NameList.push_back(Work);
>> printf(" <dir>\n");
>> }
>> else
>> printf(" (%d)\n",finder.GetLength());
>> }
>> }
>>
>> // Only now can we call ourselves to look at subdirectories.
>> // If we did this above, the current finder class would loose its place.
>> for(it = NameList.begin(); it != NameList.end(); it++) {
>> CString SubDir = Dir + "\\" + it->Filename;
>> ShowDir(SubDir);
>> }
>> indent -= 2;
>>}
>>
>

[Danny Kalev]

"Luis E. Cuadrado" wrote:
>
> Hi Pete:
> Thanks for the quick reply. I notice that you used MFC. Is that the only
> way to deal with searching the whole hard drive? This means there is no way
> to try to do it using STL?
STL doesn't address this issue directly but there are certainly other
ways to traverse a directory. Look at the <dos.h> header (if you intend
to create a console app without fancy GUI) or the <dir.h> library which
is not a part of the ANSI standard but it's a de factor standard in the
POSIX world and has been adapted to Windows too so it's quite portable.

Danny

[Pete]

You're welcome :)

I wish I knew the other ways to traverse a directory, but I don't sorry.
Maybe Danny's answer will help you out. I'm sure there must be a way to
do it, as apps were written before MFC emerged.

If you figure it out, I'd be interested in seeing a code snippet of how you
do it without including afx.h

-- Pete

[SteveJM]

"Pete" <grandpete@hotmail.com> wrote:
>
>You're welcome :)
>
>I wish I knew the other ways to traverse a directory, but I don't sorry.
> Maybe Danny's answer will help you out. I'm sure there must be a way to
>do it, as apps were written before MFC emerged.
>
>If you figure it out, I'd be interested in seeing a code snippet of how
you
>do it without including afx.h
>
>-- Pete
>

try the 32 bit _find functions: _findfirst, _findnext, _findclose. The following
example is taken directly from the MSDN Library.

/* FFIND.C: This program uses the 32-bit _find functions to print
* a list of all files (and their attributes) with a .C extension
* in the current directory.
*/

#include <stdio.h>
#include <io.h>
#include <time.h>

void main( void )
{
struct _finddata_t c_file;
long hFile;

/* Find first .c file in current directory */
if( (hFile = _findfirst( "*.c", &c_file )) == -1L )
printf( "No *.c files in current directory!\n" );
else
{
printf( "Listing of .c files\n\n" );
printf( "\nRDO HID SYS ARC FILE DATE %25c SIZE\n", '
' );
printf( "--- --- --- --- ---- ---- %25c ----\n", ' '
);
printf( ( c_file.attrib & _A_RDONLY ) ? " Y " : " N " );
printf( ( c_file.attrib & _A_SYSTEM ) ? " Y " : " N " );
printf( ( c_file.attrib & _A_HIDDEN ) ? " Y " : " N " );
printf( ( c_file.attrib & _A_ARCH ) ? " Y " : " N " );
printf( " %-12s %.24s %9ld\n",
c_file.name, ctime( &( c_file.time_write ) ), c_file.size
);

/* Find the rest of the .c files */
while( _findnext( hFile, &c_file ) == 0 )
{
printf( ( c_file.attrib & _A_RDONLY ) ? " Y " : " N " );
printf( ( c_file.attrib & _A_SYSTEM ) ? " Y " : " N " );
printf( ( c_file.attrib & _A_HIDDEN ) ? " Y " : " N " );
printf( ( c_file.attrib & _A_ARCH ) ? " Y " : " N " );
printf( " %-12s %.24s %9ld\n",
c_file.name, ctime( &( c_file.time_write ) ), c_file.size
);
}

_findclose( hFile );
}
}


Output

Listing of .c files

RDO HID SYS ARC FILE DATE SIZE
--- --- --- --- ---- ---- ----
N N N Y CWAIT.C Tue Jun 01 04:07:26 1993 1611
N N N Y SPRINTF.C Thu May 27 04:59:18 1993 617
N N N Y CABS.C Thu May 27 04:58:46 1993 359
N N N Y BEGTHRD.C Tue Jun 01 04:00:48 1993 3726