pdir.h File Reference

Filesystem interface. More...

#include <pmacros.h>
#include <ptypes.h>
#include <perror.h>

Go to the source code of this file.

Data Structures
struct	PDirEntry_
	Structure with directory entry information. More...

Typedefs
typedef struct PDir_	PDir
	Directory opaque data structure. More...
typedef enum PDirEntryType_	PDirEntryType
	Directory entry types. More...
typedef struct PDirEntry_	PDirEntry
	Structure with directory entry information. More...

Enumerations
enum	PDirEntryType_ { P_DIR_ENTRY_TYPE_DIR = 1, P_DIR_ENTRY_TYPE_FILE = 2, P_DIR_ENTRY_TYPE_OTHER = 3 }
	Directory entry types. More...

Functions
P_LIB_API PDir *	p_dir_new (const pchar *path, PError **error)
	Creates a new PDir object. More...
P_LIB_API pboolean	p_dir_create (const pchar *path, pint mode, PError **error)
	Creates a new directory on a filesystem. More...
P_LIB_API pboolean	p_dir_remove (const pchar *path, PError **error)
	Removes an empty directory. More...
P_LIB_API pboolean	p_dir_is_exists (const pchar *path)
	Checks whether a directory exists or not. More...
P_LIB_API pchar *	p_dir_get_path (const PDir *dir)
	Gets the original directory path used to create a PDir object. More...
P_LIB_API PDirEntry *	p_dir_get_next_entry (PDir *dir, PError **error)
	Gets the next directory entry info. More...
P_LIB_API pboolean	p_dir_rewind (PDir *dir, PError **error)
	Resets a directory entry pointer. More...
P_LIB_API void	p_dir_entry_free (PDirEntry *entry)
	Frees PDirEntry object. More...
P_LIB_API void	p_dir_free (PDir *dir)
	Frees PDir object. More...

Detailed Description

Filesystem interface.

Author

Alexander Saprykin

A traditional filesystem can be presented as a combination of directories and files within a defined hierarchy. A directory contains the so called entries: files and other directories. PDir allows to iterate through these entries without reading their contents, thus building a filesystem hierarchy tree.

Think of this module as an interface to the well-known dirent API.

First you need to open a directory for iterating through its content entries using p_dir_new(). After that every next entry inside the directory can be read with the p_dir_get_next_entry() call until it returns NULL (though it's better to check an error code to be sure no error occurred).

Also some directory manipulation routines are provided to create, remove and check existance.

Definition in file pdir.h.

Typedef Documentation

PDir

typedef struct PDir_ PDir

Directory opaque data structure.

Definition at line 61 of file pdir.h.

PDirEntry

typedef struct PDirEntry_ PDirEntry

Structure with directory entry information.

PDirEntryType

typedef enum PDirEntryType_ PDirEntryType

Directory entry types.

Enumeration Type Documentation

PDirEntryType_

enum PDirEntryType_

Directory entry types.

Enumerator
P_DIR_ENTRY_TYPE_DIR	Directory.
P_DIR_ENTRY_TYPE_FILE	File.
P_DIR_ENTRY_TYPE_OTHER	Other.

Definition at line 64 of file pdir.h.

Function Documentation

p_dir_create()

P_LIB_API pboolean p_dir_create	(	const pchar *	path,
		pint	mode,
		PError **	error
	)

Creates a new directory on a filesystem.

Parameters

	path	Directory path.
	mode	Directory permissions to use, ignored on Windows.
[out]	error	Error report object, NULL to ignore.

Returns

TRUE in case of success, FALSE otherwise.

Since

0.0.1

Note

Call returns TRUE if the directory path is already exists.

On OpenVMS operating system it creates intermediate directories as well.

p_dir_entry_free()

P_LIB_API void p_dir_entry_free

(

PDirEntry *

entry

)

Frees PDirEntry object.

Parameters

entry

PDirEntry to free.

Since

0.0.1

p_dir_free()

P_LIB_API void p_dir_free

(

PDir *

dir

)

Frees PDir object.

Parameters

dir	PDir to free.

Since

0.0.1

p_dir_get_next_entry()

P_LIB_API PDirEntry* p_dir_get_next_entry	(	PDir *	dir,
		PError **	error
	)

Gets the next directory entry info.

Parameters

	dir	Directory to get the next entry from.
[out]	error	Error report object, NULL to ignore.

Returns

Info for the next entry in case of success, NULL otherwise.

Since

0.0.1

Caller takes ownership of the returned object. Use p_dir_entry_free() to free memory of the directory entry after usage.

An error is set only if it is occurred. You should check the error object for P_ERROR_IO_NO_MORE code.

p_dir_get_path()

P_LIB_API pchar* p_dir_get_path

(

const PDir *

dir

)

Gets the original directory path used to create a PDir object.

Parameters

dir	PDir object to retrieve the path from.

Returns

The directory path in case of success, NULL otherwise.

Since

0.0.1

Caller takes ownership of the returned string. Use p_free() to free memory after usage.

p_dir_is_exists()

P_LIB_API pboolean p_dir_is_exists

(

const pchar *

path

)

Checks whether a directory exists or not.

Parameters

path	Directory path.

Returns

TRUE in case of success, FALSE otherwise.

Since

0.0.1

p_dir_new()

P_LIB_API PDir* p_dir_new	(	const pchar *	path,
		PError **	error
	)

Creates a new PDir object.

Parameters

path	Directory path.

Returns

Pointer to a newly created PDir object in case of success, NULL otherwise.

Parameters

[out]

error

Error report object, NULL to ignore.

Since

0.0.1

Note

If you want to create a new directory on a filesystem, use p_dir_create() instead.

p_dir_remove()

P_LIB_API pboolean p_dir_remove	(	const pchar *	path,
		PError **	error
	)

Removes an empty directory.

Parameters

	path	Directory path to remove.
[out]	error	Error report object, NULL to ignore.

Returns

TRUE in case of success, FALSE otherwise.

Since

0.0.1

The directory path should be empty to be removed successfully.

p_dir_rewind()

P_LIB_API pboolean p_dir_rewind	(	PDir *	dir,
		PError **	error
	)

Resets a directory entry pointer.

Parameters

	dir	Directory to reset the entry pointer.
[out]	error	Error report object, NULL to ignore.

Returns

TRUE in case of success, FALSE otherwise.

Since

0.0.1