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Create a Path that do not exists

Posted on 2007-11-25
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Last Modified: 2013-12-03
Hi,

someone have a short sample how I can create a path of a given string?

Like Example: I get a CString with a path like: "C:\mypat\myfolder\mySubfolder" It is now posisble that the complete path is not existing or the last folder is not existing. What I need is a function or sample how to create the complet path or the last two folders or the last folder.
I use MFC so MFC is recommended.

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Question by:Ocrana
6 Comments
 
LVL 55

Expert Comment

by:Jaime Olivares
ID: 20345741
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LVL 40

Expert Comment

by:evilrix
ID: 20346022
This is a fully POSIX compliant solution, it should work on both Windows and Linux: -
#ifdef WIN32
#include "direct.h"
#include "io.h"
#define DEFAULT_DELIM '\\'
#else
#include <sys/stat.h>
#include <unistd.h>
#define _access access
#define _mkdir(path) mkdir(path, 0777)
#define DEFAULT_DELIM '/'
#endif
 
#include "errno.h"
#include <string>
 
void MkDirs(std::string const & sFullPath, char const delim = DEFAULT_DELIM)
{
	std::string::size_type lpos = 0;
	std::string::size_type pos = 0;
 
	while(pos != sFullPath.size())
	{
		pos = sFullPath.find(delim, lpos);
		if(std::string::npos == pos) { pos = sFullPath.size(); }
 
		std::string const & sCurPath = sFullPath.substr(0, pos);
 
		if(!sCurPath.empty() && (-1 == _access(sCurPath.c_str(), 0x00)))
		{
			_mkdir(sCurPath.c_str());
		}
 
		lpos = pos + 1;
	}
}
 
int main()
{
#ifdef WIN32
	MkDirs("temp\\aaa\\bbb\\ccc\\");
#else
	MkDirs("temp/aaa/bbb/ccc/");
#endif
}

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Expert Comment

by:jkr
ID: 20346801
Either use 'SHCreateDirectory()' (http://msdn2.microsoft.com/en-us/library/ms647696.aspx) or if you can't use that for version reasone, try this lil' utility function that does that recursively:

DWORD       ChkCreateDir    (   char*   pszDir)
{
    char    acDir   [   MAX_PATH];
    char*   pc      =   NULL;
    DWORD   dwAtt   =   0;

    dwAtt   =   GetFileAttributes   (   pszDir);

    if  (   FILE_ATTRIBUTE_DIRECTORY    ==  dwAtt)
            return  (   dwAtt);

    strcpy  (   acDir,  pszDir);

    pc  =   strrchr (   acDir,  '\\');

    if  (   pc)
            *pc =   ( char) 0;
     else
            return  (   0xffffffff);

    dwAtt   =   ChkCreateDir    (   acDir);

    if  (   FILE_ATTRIBUTE_DIRECTORY    ==  dwAtt)
        {
            if  (   !CreateDirectory    (   pszDir, NULL))
                {
                    return GetLastError    ();
                }

            return  (   dwAtt);
        }

    return  (   0);
}

However, 'SHCreateDirectory()' definitely is easier to use, you'd just

#include <shlwapi.h>
#pragma comment(lib,"shlwapi.lib")

//...

SHCreateDirectory(NULL,"C:\\mypat\\myfolder\\mySubfolder");
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Author Comment

by:Ocrana
ID: 20386154
jkr: How to use this in Unicode?
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LVL 86

Accepted Solution

by:
jkr earned 500 total points
ID: 20386173
Just

#include <shlwapi.h>
#pragma comment(lib,"shlwapi.lib")

//...

SHCreateDirectory(NULL,_T("C:\\mypat\\myfolder\\mySubfolder"));


or

DWORD       ChkCreateDir    (   wchar_t*   pszDir)
{
    wchar_t    acDir   [   MAX_PATH];
    wchar_t*   pc      =   NULL;
    DWORD   dwAtt   =   0;

    dwAtt   =   GetFileAttributes   (   pszDir);

    if  (   FILE_ATTRIBUTE_DIRECTORY    ==  dwAtt)
            return  (   dwAtt);

    wcscpy  (   acDir,  pszDir);

    pc  =   wcsrchr (   acDir,  L'\\');

    if  (   pc)
            *pc =   ( wchar_t) 0;
     else
            return  (   0xffffffff);

    dwAtt   =   ChkCreateDir    (   acDir);

    if  (   FILE_ATTRIBUTE_DIRECTORY    ==  dwAtt)
        {
            if  (   !CreateDirectory    (   pszDir, NULL))
                {
                    return GetLastError    ();
                }

            return  (   dwAtt);
        }

    return  (   0);
}
0
 

Author Comment

by:Ocrana
ID: 20386229
Hi jkr. Thanks, I opened another question, if you take a look:
http://www.experts-exchange.com/Programming/System/Windows__Programming/Q_22994614.html
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