Safe Way of creating directory/folder

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I know there is no standard method of creating directories/folders in C++. But I have another question. Can I make sure ALL platforms support a way to create directories/folders? I.E. Is it possible we face a kind of platform that doesn't support directories/folders AT ALL?

Posted 30-Oct-11 4:41am

Joseph Marzbani

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Solution 1

follow the
Link[^] it will guide you very will

Posted 30-Oct-11 4:52am

Mohibur Rashid

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Joseph Marzbani 30-Oct-11 11:02am

I meant ALL platforms (windows mobile, android, windows phone 7, ...). Thank you any way

Andrew Brock 30-Oct-11 11:08am

Android uses Java. You can use the NDK to get C, but Google advise against that, especially for something as trivial as making a folder.

WM/WP7 use C#, I'm not too familiar with the platforms, there may be a way of using C on them.

iPhone uses Objective C, which is a superset of C. This, and my solution will work fine on it.

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Andrew Brock · Accepted Answer · 2011-10-30T05:05:00

The mkdir[^] function is part of the ANSI C standard. It will exist on any compiler which supports this standard, including GCC, Microsoft Visual C, Intel C, PGI C, and almost all others.

Microsoft has marked this function as deprecated, as it is not 100% safe, and recomends you use _mkdir[^], which only works the Microsoft Visual C compiler.

This function does live in different headers on different compilers however.
You will need to use the method that Johny linked to include the correct headers on the correct compilers.

C++

//Based on http://stackoverflow.com/questions/3627127/writing-cross-platform-c-code-windows-linux-and-mac-osx
#ifdef TARGET_OS_MAC
	#error I dont know where it is on MAC, probably
	#include <sys/stat.h>
#elif defined(__linux__)
	//Linux
	#include <sys/stat.h>
#elif defined(_MSC_VER)
	//Microsoft Visual C compiler
	#include <direct.h>
	#define mkdir _mkdir //Automatically use the safe function on windows
#else
	#error Unknown compiler, probably cygwin or something, probably in
	#include <sys/stat.h>
#endif

EDIT:
Generally you would not manually create a folder (or even files) on a mobile platform. You would make use of their internal functions for databases and storing data.
There are circumstances when manually making a file or folder is acceptable, and these platforms provide methods for doing so.