|o||ANY: an existing file may have any set of protection bits;|
EQUAL: an existing file mut have exactly the set of protection bits
as specified when calling Exception::protection.
The default constructor
o Exception(int errnoValue):
This constructor stores the provided errnoValue value in the global ::errno variable, provided by the run-time support system. Move and copy constructors are available.
All members of std::exception are available, as FBB::Exception inherits from this class.
o char const *what() const noexcept(true) override:
Returns the text that was inserted into the FBB::Exception object.
o Exception &&operator<<(Exception &&in, Type const &t):
A function template implementing the overloaded insertion operator. It can be used to insert values of any type that can also be inserted into an ostringstream object. The overloaded assignment and move assignment operators are available.
The following convenience functions can be used for controlled opening of stream-type objects, like std::ofstream and std::ifstream. These stream-type objects must support open and close members, like those provided by std::ifstream and std::ofstream.
If the stream was already open it is first closed.
If opening fails an FBB::Exception exception is thrown containing a short message stating that the named stream could not be opened.
o static void open(StreamType &stream, std::string const &name):
Opens the stream object, using its default open member.
o static void open(int errnoValue, StreamType &stream, std::string const &name):
Opens the stream object, using its default open member. If opening the stream fails, then the thrown FBB::Exception assigns errnoValue to ::errno.
o static void open(StreamType &stream, std::string const &name, std::ios::openmode mode):
Opens the stream object, using its open member, passing mode to open.
o static void open(int errnoValue, StreamType &stream, std::string const &name, std::ios::openmode mode):
Opens the stream object, using its open member, passing mode to open. If opening the stream fails, then the thrown FBB::Exception assigns errnoValue to ::errno.
o static size_t protection(std::string const &path, size_t protect, Protection type = EQUAL):
Returns the protection bits (cf. open(2)) of path. The protect parameter is used to specify the requested protection bits. This value is usually specified as an octal value. If the specified value exceeds 0777 an exception is thrown. The third parameter is only used in combination with already existing files. If specified as ANY the files actual permission bits are not compared with protect; if specified as EQUAL the files permission bits must be identical to protect, or an exception is thrown. If path does not yet exist a file path with permission protect is created. This member returns paths permission bits.
If path is created by protection, then opening a stream for path does not change paths protection.
The following manipulator (which is not part of the FBB::Exception, class, but is defined in the FBB namespace) can be inserted into the FBB::Exception object:
The descriptive text associated with the current errno value is inserted into the FBB::Exception object (it can also be used to insert the descriptive text in a std::ostream object). No text is inserted if errno equals zero. This manipulator is thread-safe (but errno may be modified when errno holds an invalid value).
if (exceptionalCondition) throw FBB::Exception(1) << Exceptional condition occurred;
bobcat/exception - defines the class interface
o bobcat_3.25.01-x.dsc: detached signature; o bobcat_3.25.01-x.tar.gz: source archive; o bobcat_3.25.01-x_i386.changes: change log; o libbobcat1_3.25.01-x_*.deb: debian package holding the libraries; o libbobcat1-dev_3.25.01-x_*.deb: debian package holding the libraries, headers and manual pages; o http://sourceforge.net/projects/bobcat: public archive location;
Bobcat is an acronym of Brokkens Own Base Classes And Templates.
This is free software, distributed under the terms of the GNU General Public License (GPL).
Frank B. Brokken (firstname.lastname@example.org).