Recursively Retrieving All the Files/Directories in a Directory

Question

Hello,
I want to retrieve all files in a directory, and ran into this sample code:
www.ni.com/example/27157/en/
This is the function that does the retrieve action:  GetFilesAndDirectories().  Its content is as follow:
void GetFilesAndDirectories(char dir[], int* numItems, int parentItem)
char fileName[MAX_PATHNAME_LEN], searchPath[MAX_PATHNAME_LEN];
int error = 0;
strcpy (searchPath, dir);
strcat (searchPath, "\\*");
if (!GetFirstFile (searchPath, 1, 1, 0, 0, 0, 0, fileName)) // has at least one file
InsertListItem (panelHandle, PANEL_LISTBOX, -1, fileName, (*numItems)++);
while (!GetNextFile (fileName))
InsertListItem (panelHandle, PANEL_LISTBOX, -1, fileName, (*numItems)++);
if (!GetFirstFile (searchPath, 0, 0, 0, 0, 0, 1, fileName)) // has at least one directory
char dirNamesSaved[MAX_NUM_DIR][MAX_PATHNAME_LEN];
int numDir = 0, i;
strcpy (dirNamesSaved[numDir++], fileName);
while (!GetNextFile (fileName) && numDir<MAX_NUM_DIR) // first save all the directory names
strcpy (dirNamesSaved[numDir++], fileName);
for (i=0; i<numDir; i++)
char displayName[MAX_PATHNAME_LEN];
Fmt (displayName, "%s<%s%s", fileName, " (Directory)");
InsertListItem (panelHandle, PANEL_LISTBOX, -1, displayName, (*numItems)++);
MakePathname (dir, dirNamesSaved[i], searchPath);
GetFilesAndDirectories(searchPath, numItems, (*numItems)-1);
I then modify that function into one that I can use to retrieve either files or folders, and populate a ring object with the result.  I call it Ring_Populate().  Its content is as follow:
void Ring_Populate (int panel, int TargetRing, char TargetFolder[], int Directory_Bool, int *Iteration_Now, int Iteration_Prev)
char FileName [260]; //standard = 260 max char. w/ null char.
char Folder [260];
strcpy (Folder, TargetFolder); //copy string
strcat (Folder, "*"); //add wildcard character, * or ?
switch (Directory_Bool)
case 0: //file
if (!GetFirstFile(Folder, 1, 1, 0, 0, 0, 0, FileName)) //has at least 1 file
InsertListItem (panel, TargetRing, -1, FileName, (*Iteration_Now)++);
while (!GetNextFile(FileName))
InsertListItem (panel, TargetRing, -1, FileName, (*Iteration_Now)++);
break;
default: //folder
if (!GetFirstFile(Folder, 0, 0, 0, 0, 0, 1, FileName)) //has at least 1 folder
int Folder_No = 0;
int Folder_Max = 50; //max 50 folders
char Folder_List [50][260]; //name 260 max
strcpy (Folder_List [Folder_No++], FileName); //copy first element then ++
while ( (!GetNextFile(FileName)) && (Folder_No < Folder_Max) )
strcpy (Folder_List [Folder_No++], FileName); //copy all folder names
for (int i = 0; i < Folder_No; i++)
char modFolder [260];
//Fmt (modFolder, "%s<%s%s", FileName, " (DIR)");
//InsertListItem (panel, TargetRing, -1, modFolder, (*Iteration_Now)++);
//MakePathname (TargetFolder, Folder_List [i], Folder); //recycle
//Ring_Populate (panel, TargetRing, TargetFolder, 1, Iteration_Now, (*Iteration_Now) - 1);
Fmt (modFolder, "%s<%s%s", Folder_List [i], " (DIR)");
InsertListItem (panel, TargetRing, -1, modFolder, i);
break;
It works fine.  However, the section that I commented out (modified from the sample code, which works) gives me stack overflow.
//Fmt (modFolder, "%s<%s%s", FileName, " (DIR)");
//InsertListItem (panel, TargetRing, -1, modFolder, (*Iteration_Now)++);
//MakePathname (TargetFolder, Folder_List [i], Folder); //recycle
//Ring_Populate (panel, TargetRing, TargetFolder, 1, Iteration_Now, (*Iteration_Now) - 1);
This is the original code:
char displayName[MAX_PATHNAME_LEN];
Fmt (displayName, "%s<%s%s", fileName, " (Directory)");
InsertListItem (panelHandle, PANEL_LISTBOX, -1, displayName, (*numItems)++);
MakePathname (dir, dirNamesSaved[i], searchPath);
GetFilesAndDirectories(searchPath, numItems, (*numItems)-1);
Question:
1. How do I get stack overflow?  My code is essentially the same.
2. My modified code works fine retrieving the list of folders.  I do not see the need to call the function recursively.  Can anyone explain?

Answer 1

Hello all,
I can't figurate how to list all the root directories
(C:/> , D:/>, E:/> etc.) in a system.
I know how to recursively check the content of a
directory and all its subdirectories when a
predefined path is defined. However what I' d like to
do is actually give the option to pick one of the
root directories to start the iteration. I have been
looking around but I can' really find anything
helpful.
If any of you has any idea on how to achieve the
above objective some clarification would be really
appreciated.
Thanks in advance for your help!How to installing the Javax.comm package