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ost::DirTree

NAME

ost::DirTree −

A generic class to walk a hierarchical directory structure.

SYNOPSIS

#include <file.h>

Public Member Functions

DirTree (const char *prefix, unsigned maxdepth)
Construct a directory tree walk starting at the specified prefix.

DirTree
(unsigned maxdepth)
Construct an un-opened directory tree of a known maximum depth.

virtual ~DirTree ()
void open (const char *prefix)
Open a directory tree path.

void close (void)
Close the directory path.

char * getPath (void)
Extract the next full pathname from the directory walk.

unsigned perform (const char *prefix)
This is used to step through the filter virtual for an entire subtree, and is used for cases where a derived
DirTree class performs it’s primary operations through filter rather than externally by calling getPath().

Protected Member Functions

virtual bool filter (const char *file, struct stat *ino)
Virtual method to filter results.

Detailed Description

A generic class to walk a hierarchical directory structure.

Author:

David Sugar <dyfet AT ostel DOT com> Directory tree walking.

Constructor & Destructor Documentation

ost::DirTree::DirTree (const char * prefix, unsigned maxdepth)
Construct a directory tree walk starting at the specified prefix. A maximum subdirectory depth is also specified.

Parameters:

prefix to start walk.
maxdepth
subdirectory depth to examine.

ost::DirTree::DirTree (unsigned maxdepth)
Construct an un-opened directory tree of a known maximum depth. Parameters:

maxdepth subdirectory subdirectory depth.

virtual ost::DirTree::~DirTree () [virtual]

Member Function Documentation

void ost::DirTree::close (void)
Close the directory path.

virtual bool ost::DirTree::filter (const char * file, struct stat * ino) [protected, virtual]
Virtual method to filter results. Virtual override methods should call baseclass method to assure . and .. names are stripped out.

Returns:

true if current filename is accepted.

Parameters:

file path to examine
ino
info of type, date, etc.

char* ost::DirTree::getPath (void)
Extract the next full pathname from the directory walk. When returning directories, a ’/’ is appended. The returned string is a buffer of MAX_PATH size.

Returns:

path of next subdirectory entry or NULL.

void ost::DirTree::open (const char * prefix)
Open a directory tree path. Parameters:

prefix directory path to open.

unsigned ost::DirTree::perform (const char * prefix)
This is used to step through the filter virtual for an entire subtree, and is used for cases where a derived DirTree class performs it’s primary operations through filter rather than externally by calling getPath(). Returns:

number of files and directories examined.

Parameters:

prefix directory path to examine.

Author

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