UCommon
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A container for generic and o/s portable threadsafe file system functions. More...
#include <fsys.h>
Public Types | |
enum | access_t { ACCESS_RDONLY, ACCESS_WRONLY, ACCESS_REWRITE, ACCESS_RDWR = ACCESS_REWRITE, ACCESS_APPEND, ACCESS_SHARED, ACCESS_DIRECTORY, ACCESS_STREAM, ACCESS_RANDOM } |
Enumerated file access modes. | |
typedef long | offset_t |
File offset type. | |
Public Member Functions | |
void | assign (fd_t descriptor) |
Assign descriptor directly. | |
void | close (void) |
Close a fsys resource. | |
void | create (const char *path, access_t access, unsigned mode) |
Open a file descriptor directly. | |
int | drop (offset_t size=0) |
Drop cached data from start of file. | |
int | err (void) const |
Get last error. | |
fsys (const char *path, access_t access, unsigned permission) | |
Create a fsys descriptor by creating a file. | |
fsys (const fsys &descriptor) | |
Copy (dup) an existing fsys descriptor. | |
fsys () | |
Construct an unattached fsys descriptor. | |
fsys (const char *path, access_t access) | |
Create a fsys descriptor by opening an existing file or directory. | |
fd_t | getHandle (void) const |
Get the native system descriptor handle of the file descriptor. | |
void | open (const char *path, access_t access) |
Open a file or directory. | |
operator bool () const | |
Test if file descriptor is open. | |
operator fd_t () const | |
Get the descriptor from the object by casting reference. | |
bool | operator! () const |
Test if file descriptor is closed. | |
fd_t | operator* () const |
Get the descriptor from the object by pointer reference. | |
void | operator= (fd_t descriptor) |
Assing file descriptor from system descriptor. | |
void | operator= (const fsys &descriptor) |
Assign file descriptor by duplicating another descriptor. | |
ssize_t | read (void *buffer, size_t count) |
Read data from descriptor or scan directory. | |
int | seek (offset_t offset) |
Set the position of a file descriptor. | |
int | stat (struct stat *buffer) |
Get status of open descriptor. | |
int | sync (void) |
Commit changes to the filesystem. | |
int | trunc (offset_t offset) |
Truncate file to specified length. | |
ssize_t | write (const void *buffer, size_t count) |
Write data to descriptor. | |
~fsys () | |
Close and release a file descriptor. | |
Static Public Member Functions | |
static int | access (const char *path, unsigned mode) |
Test path access. | |
static void | assign (fsys &object, fd_t descriptor) |
Assign a descriptor directly. | |
static int | change (const char *path, unsigned mode) |
Change file access mode. | |
static int | changeDir (const char *path) |
Set directory prefix (chdir). | |
static void | close (fsys &descriptor) |
Close a file descriptor or directory directly. | |
static void | create (fsys &object, const char *path, access_t access, unsigned mode) |
create a file descriptor or directory directly. | |
static int | createDir (const char *path, unsigned mode) |
Simple direct method to create a directory. | |
static int | drop (fsys &descriptor, offset_t size) |
Drop cached data from a file descriptor. | |
static void * | find (fsys &module, const char *symbol) |
Find symbol in loaded module. | |
static int | getPrefix (char *path, size_t size) |
Get current directory prefix (pwd). | |
static bool | isdev (struct stat *inode) |
static bool | isdir (const char *path) |
Test if path is a directory. | |
static bool | isdir (struct stat *inode) |
static bool | isdisk (struct stat *inode) |
static bool | isfile (const char *path) |
Test if path is a file. | |
static bool | isfile (struct stat *inode) |
static bool | islink (struct stat *inode) |
static bool | issys (struct stat *inode) |
static int | load (const char *path) |
Load an unmaged plugin directly. | |
static void | load (fsys &module, const char *path) |
Load a plugin into memory. | |
static void | open (fsys &object, const char *path, access_t access) |
Open a file or directory. | |
static ssize_t | read (fsys &descriptor, void *buffer, size_t count) |
Read data from file descriptor or directory. | |
static int | remapError (void) |
static int | remove (const char *path) |
Remove a file. | |
static int | removeDir (const char *path) |
Simple direct method to remove a directory. | |
static int | rename (const char *oldpath, const char *newpath) |
Rename a file. | |
static int | seek (fsys &descriptor, offset_t offset) |
Set the position of a file descriptor. | |
static int | stat (const char *path, struct stat *buffer) |
Stat a file. | |
static void | unload (fsys &module) |
unload a specific plugin. | |
static ssize_t | write (fsys &descriptor, const void *buffer, size_t count) |
write data to file descriptor. | |
Static Public Attributes | |
static const offset_t | end |
Used to mark "append" in set position operations. | |
Protected Attributes | |
int | error |
fd_t | fd |
void * | ptr |
A container for generic and o/s portable threadsafe file system functions.
These are based roughly on their posix equivilents. For libpth, the system calls are wrapped. The native file descriptor or handle may be used, but it is best to use "class fsys" instead because it can capture the errno of a file operation in a threadsafe and platform independent manner, including for mswindows targets.
ucc::fsys::fsys | ( | const fsys & | descriptor | ) |
Copy (dup) an existing fsys descriptor.
descriptor | to copy from. |
ucc::fsys::fsys | ( | const char * | path, |
access_t | access | ||
) |
Create a fsys descriptor by opening an existing file or directory.
path | of file to open for created descriptor. |
access | mode of file. |
ucc::fsys::fsys | ( | const char * | path, |
access_t | access, | ||
unsigned | permission | ||
) |
Create a fsys descriptor by creating a file.
path | of file to create for descriptor. |
access | mode of file access. |
permission | mode of file. |
static int ucc::fsys::access | ( | const char * | path, |
unsigned | mode | ||
) | [static] |
Test path access.
path | to test. |
mode | to test for. |
void ucc::fsys::assign | ( | fd_t | descriptor | ) | [inline] |
static void ucc::fsys::assign | ( | fsys & | object, |
fd_t | descriptor | ||
) | [inline, static] |
static int ucc::fsys::change | ( | const char * | path, |
unsigned | mode | ||
) | [static] |
Change file access mode.
path | to change. |
mode | to assign. |
static int ucc::fsys::changeDir | ( | const char * | path | ) | [static] |
Set directory prefix (chdir).
path | to change to. |
static void ucc::fsys::close | ( | fsys & | descriptor | ) | [inline, static] |
void ucc::fsys::create | ( | const char * | path, |
access_t | access, | ||
unsigned | mode | ||
) |
Open a file descriptor directly.
path | of file to create. |
access | mode of descriptor. |
mode | of file if created. |
static int ucc::fsys::createDir | ( | const char * | path, |
unsigned | mode | ||
) | [static] |
Simple direct method to create a directory.
path | of directory to create. |
mode | of directory. |
int ucc::fsys::drop | ( | offset_t | size = 0 | ) |
Drop cached data from start of file.
size | of region to drop or until end of file. |
int ucc::fsys::err | ( | void | ) | const [inline] |
static void* ucc::fsys::find | ( | fsys & | module, |
const char * | symbol | ||
) | [static] |
Find symbol in loaded module.
module | to search. |
symbol | to search for. |
fd_t ucc::fsys::getHandle | ( | void | ) | const [inline] |
static int ucc::fsys::getPrefix | ( | char * | path, |
size_t | size | ||
) | [static] |
Get current directory prefix (pwd).
path | to save directory into. |
size | of path we can save. |
static bool ucc::fsys::isdir | ( | const char * | path | ) | [static] |
Test if path is a directory.
path | to test. |
static bool ucc::fsys::isfile | ( | const char * | path | ) | [static] |
Test if path is a file.
path | to test. |
static void ucc::fsys::load | ( | fsys & | module, |
const char * | path | ||
) | [static] |
Load a plugin into memory.
module | for management. |
path | to plugin. |
static int ucc::fsys::load | ( | const char * | path | ) | [static] |
Load an unmaged plugin directly.
path | to plugin. |
void ucc::fsys::open | ( | const char * | path, |
access_t | access | ||
) |
Open a file or directory.
path | of file to open. |
access | mode of descriptor. |
ucc::fsys::operator bool | ( | ) | const [inline] |
ucc::fsys::operator fd_t | ( | ) | const [inline] |
bool ucc::fsys::operator! | ( | ) | const [inline] |
fd_t ucc::fsys::operator* | ( | ) | const [inline] |
void ucc::fsys::operator= | ( | fd_t | descriptor | ) |
Assing file descriptor from system descriptor.
descriptor | to dup from. |
void ucc::fsys::operator= | ( | const fsys & | descriptor | ) |
Assign file descriptor by duplicating another descriptor.
descriptor | to dup from. |
ssize_t ucc::fsys::read | ( | void * | buffer, |
size_t | count | ||
) |
Read data from descriptor or scan directory.
buffer | to read into. |
count | of bytes to read. |
static ssize_t ucc::fsys::read | ( | fsys & | descriptor, |
void * | buffer, | ||
size_t | count | ||
) | [inline, static] |
static int ucc::fsys::remove | ( | const char * | path | ) | [static] |
Remove a file.
path | of file. |
static int ucc::fsys::removeDir | ( | const char * | path | ) | [static] |
Simple direct method to remove a directory.
path | to remove. |
static int ucc::fsys::rename | ( | const char * | oldpath, |
const char * | newpath | ||
) | [static] |
Rename a file.
oldpath | to rename from. |
newpath | to rename to. |
int ucc::fsys::seek | ( | offset_t | offset | ) |
Set the position of a file descriptor.
offset | from start of file or "end" to append. |
Reimplemented in ucc::fbuf.
static int ucc::fsys::stat | ( | const char * | path, |
struct stat * | buffer | ||
) | [static] |
Stat a file.
path | of file to stat. |
buffer | to save stat info. |
int ucc::fsys::stat | ( | struct stat * | buffer | ) |
Get status of open descriptor.
buffer | to save status info in. |
int ucc::fsys::sync | ( | void | ) |
Commit changes to the filesystem.
int ucc::fsys::trunc | ( | offset_t | offset | ) |
Truncate file to specified length.
The file pointer is positioned to the new end of file.
offset | to truncate to. |
Reimplemented in ucc::fbuf.
static void ucc::fsys::unload | ( | fsys & | module | ) | [static] |
unload a specific plugin.
module | to unload |
static ssize_t ucc::fsys::write | ( | fsys & | descriptor, |
const void * | buffer, | ||
size_t | count | ||
) | [inline, static] |
ssize_t ucc::fsys::write | ( | const void * | buffer, |
size_t | count | ||
) |
Write data to descriptor.
buffer | to write from. |
count | of bytes to write. |