Free c software for linux

Lightweight C++ is a programming language that looks like C++ (a lightweight C++ dialect) and is directly translated to readable C by the lwc preprocessor.
Its more "K&R" and, well, more lightweight. Important thing about lightweight C++ is that by studying the generated C code it is easy to understand how OOP features are implemented and what is the cost of everything.
Adding new features and extensions is also very easy (much easier than adding new C++ extensions to gcc at least), and this is one of lwc goals: To keep evolving.
Main features:
- function overloading,
- member functions,
- inheritance,
- virtual functions (polymorphism),
- multiple inheritance,
- virtual inheritance and pure virtual functions,
- constructors, destructors,
- new and delete,
- default function arguments,
- simple exceptions (no auto destruction of locals)
- and a mechanism of simplistic templates (implemented as high-level multi-line macros).
- operator overloading (works with ptrs when it can)
- +other
Enhancements:
- Changed the generated code for the gcc cleanup attribute so that if a constructor throws, the destructor is not invoked. As in the simple case where we dont have the cleanup attribute and like C++.

ResourcePool is a C++ library which can be used to pool resources of every kind. One very interesting side effect is that it can also be used of abstraction layer by providing a unique API for different resources of similar resource types.
Most prominent example are SQL databases. The ResourcePool does currently include a convenient way to access MySQL and Oracle databases in the same way, so that changing for MySQL to Oracle or vice-versa does not need big code changes.
Enhancements:
- Corrected handling of NoFailoverExceptions. Previously it did just not work.
- Fixed a bug which could cause undefined behavior in MultiThreadedModel when a caller had to wait for resources (when the Max limit is reached).
- The argument validation of the bindout() and isnull() methods of SQLSelect(Row) commands has been corrected.
- Fixed a bug in the Cache class which caused an unreasonable exception in case an already cached value is put again.
- The isnull() method has been added to the Runtime selectable SQL driver (fatalmind::ResourceType::SQL).
- The NoFailoverExceptions thrown in the mysql driver do now include the correct message. The messages were lost due to a missing explicit constructor call to the virtual base class.
- The getFactory() method in ResourcePool is now public and returns a const reference.
- Implemented some rudimentary statistics. See ResourcePool.getStats() for details.
- Building improvement: -lrt is used (and not used) more correctly.
- The testing framework has been extended to optionally perform testing in multiple threads. The default behavior has not been changed (make check does not use multiple threads). However when running the test programs manually you can add "-m" as argument. Each "m" does add an additional thread for testing. However, the test programs itself need also to provide such test cases.
- The test cases (used with make check) do now use the complete library. This has the drawback that building must always be done in the top level directory before performing tests. However, the tests use the real library now (and not just a subset) so that the overall testing quality is a little improved.

C to C++ is a Python script that converts C code to C++ code.

The main program is ctocpp.py that performs successive stages for converting C to C++. A script, ctocpp gives it as parameter to the python interpreter with options you add.

The archive also includes scripts that may help you:

- mover.py changes the location of a project.
- search.py performs searches and replacements.
- mkheader.py corrects a header file.

The C to C++ program with all the python sources is under the GNU GPL license,
that minds you may use it and distribute it freely, providing the copyright is unchanged.

See at the COPYING file for details. This doesnt mean GNU encourages you to convert your C sources to C++. In fact, most of the tools here included may help C programmers outside C++ conversion.

Installing:

Type:
./configure
./setup
mkdoc ...this will generate an html and info manuals.

Java for C++ is a tool to generate C++-wrapper-classes for existing Java-classes. This tool reads a list of Java class names and creates source code for C++-classes to wrap them.
The implementation of the wrapper classes uses JNI (Java Native Interface) to call the "real" Java classes.
The C++-API to use these wrapper classes is very close to the API of the original Java classes. So developers of C++-software can use Java-classes as if they have been implemented in C++.
Enhancements:
- A problem where null values for method arguments, method return values, or field values caused some generated code to crash was fixed.
- Updating is strongly encouraged.

More for C++ is a class library that provides some features usually not common for C++

More for C++ includes a mark-sweep garbage collector, platform-independent classes for threading, sockets, and I/O, unit tests, and a few other utility classes.

First of all, there is a garbage collector for automatic memory management. When an object has been referenced by a special smart pointer and should not be used any more, it will be destroyed by the librarys garbage collector.

Next, there are platform independent packages for file operations, networking and multithreading. At the time being, concrete implementations exist for Win32 and GNU/Linux.

Additionally, the library has some utility classes like containers, observers and (of course the inevitable class "String" (which - like any other class provided by and used with this library - will also be managed by the garbage collector).
One of the most recent packages is called "servlet". It offers the possibility to write loadable modules for the popular Apache web server, serving dynamic content with C++.

Last but not least, "More for C++" comes with its own framework for writing unit tests. This package has been inspired by the fabulous JUnit by Kent Beck and Erich Gamma.

By using this library, you are able to combine the performance of C++ with the elegance and ease of use of Java and Python. A native garbage collector in combination with the smart pointer class helps you to avoid common programming errors like dangling pointers or memory leaks. Besides this, the platform independence helps you to easily port your programs to the most important operating systems.

GNU C library (glibc) is one of the most important components of GNU Hurd and most modern Linux distributions.

GNU C library is used by almost all C programs and provides the most essential program interface.

The history of Unix and various standards determine much of the interface of the C library. In general the GNU C library supports the ISO C and POSIX standards. We also try to support the features of popular Unix variants (including BSD and System V) when those do not conflict with the standards. Different compatibility modes (selectable when you compile an application) allow the peaceful coexistence of compatibility support for different varieties of Unix.

The GNU C library is primarily designed to be a portable and high performance C library.

It follows all relevant standards (ISO C 99, POSIX.1c, POSIX.1j, POSIX.1d, Unix98, Single Unix Specification). It is also internationalized and has one of the most complete internationalization interfaces known.

Exceptions in C implements fully-functional nested exceptions with these constructs:

try
except
on
throw

Also, it allows to define various datatypes for exception object (default is int, can be anything from char * to struct foo *).

Compiling and running

Precodey straight forward.

admp@sols:~/excc/example$ gcc exception.c -c
admp@sols:~/excc/example$ gcc exception.o example.c -o example
admp@sols:~/excc/example$ ./example
Usage: ./example A B
admp@sols:~/excc/example$ ./example 100 2
100/2=50
Program is going to end its short life.
admp@sols:~/excc/example$ ./example 100 0
Caught up division by zero (100/0).
Program is going to end its short life.

Attributions:

Felix Ogg for inspiring me to write finally, also detailed feedbacks and ideas for documentation (diagrams too!). Though I havent completed that - for almost a year now; I am not sure I ever will.