#include <sbuild-dirstream.h>
Collaboration diagram for sbuild::dirstream:
Public Types | |
typedef custom_error< error_code > | error |
Exception type. | |
DIR_OPEN | |
Failed to open directory. | |
DIR_READ | |
Failed to read directory. | |
enum | error_code { DIR_OPEN, DIR_READ } |
Error codes. More... | |
Public Member Functions | |
dirstream (std::string const &dir) | |
The constructor. | |
virtual | ~dirstream () |
The destructor. | |
void | open (std::string const &dirname) |
Open a directory for reading. | |
void | close () |
Close the directory. | |
bool | eof () const |
Check for End Of File. | |
bool | bad () const |
Check for errors. | |
operator bool () | |
Check if the dirstream status is good. | |
bool | operator! () |
Check if the dirstream status is bad. | |
Private Member Functions | |
void | read (int quantity=1) |
Read dirents from the underlying DIR stream into the data deque. | |
Private Attributes | |
std::string | dirname |
The directory name. | |
DIR * | dir |
The underlying DIR stream. | |
std::deque< direntry > | data |
A list of direntries represents the directory stream as a LIFO stack. | |
bool | error_status |
Error status. | |
bool | eof_status |
End of File status. | |
Friends | |
dirstream & | operator>> (dirstream &stream, direntry &entry) |
The overloaded extraction operator. |
This is a wrapper around the opendir(3), readdir(3) and closedir(3) functions, which are used to read a stream of "dirents" through multiple readdir() calls.
dirstream calls opendir() and closedir() automatically, and represents each dirent as a dirstream::direntry. Like reading from and istream by pulling data out with the >> "extraction operator", direntries are also extracted from the dirstream with the >> operator.
Exception type.
dirstream::dirstream | ( | std::string const & | dir | ) |
The constructor.
dir | the directory to read. |
dirstream::~dirstream | ( | ) | [virtual] |
The destructor.
bool dirstream::bad | ( | ) | const |
Check for errors.
If there is an error, the dirstream is unusable until the next open() call.
void dirstream::close | ( | ) |
bool dirstream::eof | ( | ) | const |
Check for End Of File.
Note that the end of file status is only set adter a read fails, so this should be checked after each read.
void dirstream::open | ( | std::string const & | dirname | ) |
Open a directory for reading.
This uses the opendir(3) call to open the underlying DIR stream. Any previously open directory is closed before opening the new one. The dirstream error state is set if the open fails, and an exception will be thrown.
dirname | the directory to read. |
sbuild::dirstream::operator bool | ( | ) |
bool sbuild::dirstream::operator! | ( | ) |
void dirstream::read | ( | int | quantity = 1 |
) | [private] |
Read dirents from the underlying DIR stream into the data deque.
If the read fails, the error state will be set, and an exception will be thrown.
quantity | the number of dirents to read. |
The overloaded extraction operator.
This is used to pull direntries from a dirstream.
stream | the dirstream to get input from. | |
entry | the direntry to set. |
std::deque<direntry> sbuild::dirstream::data [private] |
A list of direntries represents the directory stream as a LIFO stack.
DIR* sbuild::dirstream::dir [private] |
The underlying DIR stream.
std::string sbuild::dirstream::dirname [private] |
The directory name.
bool sbuild::dirstream::eof_status [private] |
End of File status.
bool sbuild::dirstream::error_status [private] |
Error status.