Help-Site Computer Manuals
Software
Hardware
Programming
Networking
  Algorithms & Data Structures   Programming Languages   Revision Control
  Protocols
  Cameras   Computers   Displays   Keyboards & Mice   Motherboards   Networking   Printers & Scanners   Storage
  Windows   Linux & Unix   Mac

OS2::PrfDB
Perl extension for access to OS/2 setting database.

OS2::PrfDB - Perl extension for access to OS/2 setting database.


NAME

OS2::PrfDB - Perl extension for access to OS/2 setting database.


SYNOPSIS


  use OS2::PrfDB;

  tie %settings, OS2::PrfDB, 'my.ini';

  tie %subsettings, OS2::PrfDB::Sub, 'my.ini', 'mykey';

  print "$settings{firstkey}{subkey}\n";

  print "$subsettings{subkey}\n";

  tie %system, OS2::PrfDB, SystemIni;

  $system{myapp}{mykey} = "myvalue";


DESCRIPTION

The extention provides both high-level and low-level access to .ini files.

High level access

High-level access is the tie-hash access via two packages: OS2::PrfDB and OS2::PrfDB::Sub. First one supports one argument, the name of the file to open, the second one the name of the file to open and so called Application name, or the primary key of the database.


  tie %settings, OS2::PrfDB, 'my.ini';

  tie %subsettings, OS2::PrfDB::Sub, 'my.ini', 'mykey';

One may substitute a handle for already opened ini-file instead of the file name (obtained via low-level access functions). In particular, 3 functions SystemIni(), UserIni(), and AnyIni() provide handles to the ``systemish'' databases. AniIni will read from both, and write into User database.

Low-level access

Low-level access functions reside in the package OS2::Prf. They are

Open(file)
Opens the database, returns an integer handle.

Close(hndl)
Closes the database given an integer handle.

Get(hndl, appname, key)
Retrieves data from the database given 2-part-key appname key. If key is undef, return the ``\0'' delimited list of keys, terminated by \0. If appname is undef, returns the list of possible appnames in the same form.

GetLength(hndl, appname, key)
Same as above, but returns the length of the value.

Set(hndl, appname, key, value [ , length ])
Sets the value. If the value is not defined, removes the key. If the key is not defined, removes the appname.

System(val)
Return an integer handle associated with the system database. If val is 1, it is User database, if 2, System database, if 0, handle for ``both'' of them: the handle works for read from any one, and for write into User one.

Profiles()
returns a reference to a list of two strings, giving names of the User and System databases.

SetUser(file)
(Not tested.) Sets the profile name of the User database. The application should have a message queue to use this function!

Integer handles

To convert a name or an integer handle into an object acceptable as argument to tie() interface, one may use the following functions from the package OS2::Prf::Hini:

new(package, file)
new_from_int(package, int_hndl [ , filename ])

Exports

SystemIni(), UserIni(), and AnyIni().


AUTHOR

Ilya Zakharevich, ilya@math.ohio-state.edu


SEE ALSO

perl(1).

Programminig
Wy
Wy
yW
Wy
Programming
Wy
Wy
Wy
Wy