scooter1
asked on
Sorting files in a given directory
ok part of a program i'm working on needs to take a given directory say "C:\\myfiles" create a new sub directory say "C:\\myfiles\\group1\\" and then MOVE UP TO 795 MB of the files in "myfiles" to it. Then repeate untill the folder is completly sub divided. So if there were 1600 MB of files in "myfiles" you would have about 795 MB in "group1" and 795 MB in "group2" and about 10 MB in "group3". Any suggestions.
Check SHFileOperation API, that can use for copy/move/delete all files in Directory
You would be crazy to actually copy this file data to the new directories -- unless you need duplicates. Just use the rename function. Size of files is unimportant since just a directory entry is changed -- you can "move" 100GB of data in 10ms that way.
To create the new directory, use the mkdir() fn.
To move the files from one directoy to another, sue the rename() fn.
Yes, there are lots of pretty objects (such a CFile) and higher levels (such as SHFileOperation), but they all boil down to calling the low-level mkdir and rename code.
It is the most trivial of file operations. Do you need some example code?
-- Dan
To create the new directory, use the mkdir() fn.
To move the files from one directoy to another, sue the rename() fn.
Yes, there are lots of pretty objects (such a CFile) and higher levels (such as SHFileOperation), but they all boil down to calling the low-level mkdir and rename code.
It is the most trivial of file operations. Do you need some example code?
-- Dan
Your question's title mentions "sorting files," but you don't mention anything about sorting in the question itself. Would you explain your needs?
I suspect that you need to create directories like this:
c:\myfiles\AtoM
c:\myfiles\NtoS
c:\myfiles\TtoZ
and move files whose filenames begin with A through M from c:\myfiles to c:\myfiles\AtoM
Is this correct? Or do you have some other criteria for deciding which files go into which directory?.
Unless it is a very simple criteria, such as moving all fils with a certain extension or date, you may need to create and populate a list of all files in c:\myfiles and use a utility such as qsort to order them, then go down the list using rename with each one.
What is the criteria you will use to decide which directories to create and which files to put there?
-- Dan
I suspect that you need to create directories like this:
c:\myfiles\AtoM
c:\myfiles\NtoS
c:\myfiles\TtoZ
and move files whose filenames begin with A through M from c:\myfiles to c:\myfiles\AtoM
Is this correct? Or do you have some other criteria for deciding which files go into which directory?.
Unless it is a very simple criteria, such as moving all fils with a certain extension or date, you may need to create and populate a list of all files in c:\myfiles and use a utility such as qsort to order them, then go down the list using rename with each one.
What is the criteria you will use to decide which directories to create and which files to put there?
-- Dan
ASKER
oh my criteria isn't really criteria I didn't word it right. I really just want to like partition the directory. So it can take the first 795 MB and put this in a folder called "group1", then take the next 795 MB and move to folder "group2" The problem is creating a directory moving no more than 795 MB to it, then creating another directory moving up to 795 MB to it and so on till all the files are now in a new sub-directory.
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ASKER
dude sweet, thanks.
For the first problem, I recommend you the class CFileFind, which has many usefull operations for file manipulation.
For the second part of the problem, take a look to the MFC class CFile, or simply use the I/O basic functions like CreateFile(), DeleteFile(), CopyFile() etc. CopyFileEx() is doing the copy asyncronicly, and this can help you to avoid the thread programming and still have good performance...