Free abstraction software for linux

Database Independent Abstraction Layer for C (libdbi) implements a database-independent abstraction layer in C, similar to the DBI/DBD layer in Perl.
Writing one generic set of code, programmers can leverage the power of multiple databases and multiple simultaneous database connections by using this framework.
Main features:
Database-level abstraction:
Your programs dont need to deal with the arbitrary interfaces and oddities of each database library. libdbi handles all the details for you, you just tell it what you want the database to do.
Modularity:
Since database code written with libdbi is not tied to one specific database server, you can effortlessly switch databases or give your users the option to specify their own database settings.
Clean interface:
With ample documentation describing libdbi and its well thought out object-oriented design, programming with libdbi should be less painful than programming with native database libraries. And you only need to learn it once instead of learning each database librarys syntax.
Accommodates coder apathy:
libdbi is written to do The Right Thing(tm), not just some quick hack that does the job in a half-assed fashion. This saves tons of your $100/hour time from debugging, so that you can mess around having fun during the hours that clients are paying you to debug. It also strives to reduce the worldwide crisis of carpal tunnel syndrome, so it uses constructs such as this one to pack multiple function calls into one line, saving you the bother of typing more than you have to:
dbi_result_get_fields(result, "id.%i firstname.%s lastname.%s fractional_value.%f", &id, &firstname, &lastname, &floatval);
Driver interface:
The dynamic linking used by libdbi allows for driver authors to license their drivers however they please - they are not restricted to the GPL or LGPL. Drivers are easy to write, and require no special installation.
Error handling:
Instead of checking every single database call for errors, libdbi gives programmers the option of registering an error handler callback, similar to a signal handler. Because we know youll "forget" to check for errors otherwise :)
Convenience:
Spend your time writing clever code, not reinventing the wheel with your own single-use, #define-abusing, less featureful database interface.
libdbi implements a database-independent abstraction layer in C, similar to the DBI/DBD layer in Perl. Writing one generic set of code, programmers can leverage the power of multiple databases and multiple simultaneous database connections by using this framework.
The libdbi-drivers project maintains drivers for libdbi. Drivers are distributed seperately from the library itself.
There are currently drivers for MySQL, PostgreSQL, SQLite, and mSQL. More are on the way.
Enhancements:
- Support for a timezone suffix in time and date types was added.
- Error handling and error reporting were vastly improved.
- Some memory leaks were fixed.

DBIx::SQL::Abstract is a Perl module that provides a convenient abstraction layer to a database.

SYNOPSIS

use DBIx::SQL::Abstract;

my $dbh = DBIx::SQL::Abstract->new( %dbcfg );

Building SQL Abstractions.

my($query, @bind) = $dbh->select($table, @fields, %where, @order);
my($query, @bind) = $dbh->insert($table, %fieldvals || @values);
my($query, @bind) = $dbh->update($table, %fieldvals, %where);
my($query, @bind) = $dbh->delete($table, %where);

Using DBI methods

my $sth = $dbh->prepare($query);
$sth->execute(@bind_params);
...
my $rc = $dbh->begin_work;
my $rc = $dbh->commit;
my $rc = $dbh->rollback;
my $rc = $dbh->disconnect;

Anything else DBI method can be used, by Example:

my $err = $dbh->err;
my $err = $dbh->errstr;
my $rv = $dbh->state;
my $rc = $dbh->DESTROY;

The intention of this module is to join some methods from the DBI and the SQL::Abstract modules, for a convenient and easy use.

To begin, we create an object, but first we must create a hash which contains the database parameters as follows.

my %dbcfg = { PrintError => 1,
RaiseError => 0,
AutoCommit => 0,
ChopBlanks => 1
driver => Pg,
dbname => db,
host => undef,
port => undef,
user => user,
passwd => undef
};

Notice that this parameters are set as default unless you set your required values.
my $dbh = DBIx::SQL::Abstract->new( %dbcfg );

This object automatically creates the connection with the database, and gets the methods listed above.

PHP_Application project is a platform for development of event-driven applications in which two mechanisms of distribution of events for two levels of abstraction accordingly are realized. The first level are objects and their events, the second - the application and its events.
The mechanism of distribution of events of the applications supports distribution of the directed and broadcasting events, and also provides synchronous or asynchronous processing events.
The structure of the application represents hierarchy of objects with various levels of abstraction. Functionality of the application is completely defined by a set of the objects included in the application, and interaction between them, i.e. a stream of events. The used structure of the application allows to operate a stream of events extending downwards on hierarchy of objects.
PHP_Application includes, also, two interchangeable libraries: HTML Component Library (HCL) and XML Component Library (XCL) which use, accordingly, HTML Template Engine and XSLT Processor for generation of page. Thus, the application can be adjusted easily for use of this or that way of generation of page.
To additional features PHP_Application concern: multilanguage support; the ability to control access of object properties; multilevel access to the data of tabulared and tree-like type and many other things.
Enhancements:
- In the new version support of Aspect-Oriented programming is added;
- the rendering system is refactored;
- many new classes are added;
- new examples and the documentation are added;
- many bugs are corrected.

shalVideo is a TV record scheduling program, the goal is that you can just use your computer just like a video recorder.

shalVideo just gives you the abstraction from other tools you MUST have installed, look at the Requirements for details.

shalVideo reads the channels list from a file that you have to write down, or download if there is one for your place. Right now, thanks to JCamGra, you can create the channels file from xawtv config using the xawitv2svch script

DirectFB is a thin library that provides developers with hardware graphics acceleration, input device handling and abstraction, integrated windowing system with support for translucent windows and multiple display layers on top of the Linux Framebuffer Device.
DirectFB project is a complete hardware abstraction layer with software fallbacks for every graphics operation that is not supported by the underlying hardware. DirectFB adds graphical power to embedded systems and sets a new standard for graphics under Linux.
Main features:
- Rectangle filling/drawing
- Triangle filling/drawing
- Line drawing
- Flat shaded triangles
- Simple blitting
- Stretched blitting
- Textured triangles (perspective correct)
- Blending with an alphachannel (per pixel alpha)
- Blending with an alpha factor (alpha modulation)
- Nine source and destination blend functions
- Porter/Duff rules are supported
- Premultiplied alpha supported
- Colorized blitting (color modulation)
- Source color keying
- Destination color keying
Enhancements:
The time has come
Let it all begin,
Start the future,
Head forward and
Make it happen
This is for you!

EiffelVision 2 is a platform independent GUI library.

EiffelVision2 is a nice GUI toolkit abstraction that works on multiple platforms. Based on GTK for Unix and WEL on Windows.

DBD::Amazon is a DBI driver abstraction for the Amazon E-Commerce Services API.

SYNOPSIS

$dbh = DBI->connect(dbi:Amazon:, $amznid, undef,
{ amzn_mode => books,
amzn_locale => us,
amzn_max_pages => 3
})
or die "Cannot connect: " . $DBI::errstr;
#
# search for some Perl DBI books
#
$sth = $dbh->prepare("
SELECT ASIN,
Title,
Publisher,
PublicationDate,
Author,
SmallImageURL,
URL,
SalesRank,
ListPriceAmt,
AverageRating
FROM Books
WHERE MATCHES ALL(Perl, DBI) AND
PublicationDate >= 2000-01-01
ORDER BY SalesRank DESC,
ListPriceAmt ASC,
AverageRating DESC");

$sth->execute or die Cannot execute: . $sth->errstr;

print join(, , @$row), "n"
while $row = $sth->fetchrow_arrayref;

$dbh->disconnect;

DBD::Amazon provides a DBI and SQL syntax abstraction for the Amazon(R) E-Commerce Services 4.0 API aka ECS. http://www.amazon.com/gp/. Using the REST interface, and a limited SQL dialect, it provides a DBI-friendly interface to ECS.

Be advised that this is ALPHA release software and subject to change at the whim of the author(s).