Free language arts games software for linux

X Language is a new multi-syntax programming including a portable set of APIs to create console or graphical applications runnable on many platforms (UNIX/X11, Win32, ...). X Language comes with an interpreter, a compiler and a debugger.
X Language is publicly available under the GPL.
Installation
- tar -xzf xlang-0.7.1.tar.gz
- cd xlang-0.7.1
- ./configure
- make
- make install
- ./xlc calc.xc
Enhancements:
- Adding LANG/MATH specifications
- Adding SYS (basic) specifications
- Start implementing the SCR API

Language::Zcode::Runtime::State is a Perl module to handle saving, restoring, etc. the game state.

restoring

Getter/setter: currently in the process of restoring or not?

start_machine

Start executing the Z-machine.

In the normal case (starting a new game, or restarting), this is as simple as calling the Z-machine subroutine whose address is stored in the header.
If were restoring from a save file, its more complicated. See "resume_execution".

z_call

Wrapper around Z-code subroutine calls. The main reason we need it is for save/restore.

In the normal case, z_call just calls the Z-code subroutine at address arg0 with the given args (arg5-argn), if any. Args 1-4 arent used by z_call, but (hack alert!) they go into the Perl call stack, which is needed for saving Z-machine state.

Input: subroutine address to call, local variables & eval stack (arrayrefs), next PC, store variable, args to the Z-sub.

See "The call stack" for far more detail on this sub and save/restore.

save_state

Implement the @save opcode, saving the current Z-machine state (as opposed to writing a table to a file, the other use of the @save opcode)

Note that this sub also gets called at the very end of the restoring process.

Returns 0 for failed save, 1 for successful save, 2 for "just finished restoring".

build_save_stack

Create a Z-machine call stack by peeking at the Perl call stack.

When calling Z_machine subroutines, we call z_call with all the information contained in a Z stack frame. We retrieve that information from the Perl call stack and build a Z-machine call stack with it.

restore_state

Implement the @restore opcode, restoring the current Z-machine state (as opposed to reading a table from a file, the other use of the @restore opcode)

. Its syntax is almost identical to that of the Interactive Data Language (IDL).
Main features:
- all language elements are supported
- multithreaded operators
- array operations use MMX/SSE/SSE2, if available
- module profiling
- line profiling
- about 300 library functions (more or less usable)
- true-color (24 bit) direct graphics devices: X, WIN, PS, PDF, Z
- run-time performance: for many programs, FL is faster than IDL (eg. the empty loop is three times faster in FL :-)
Installation:
- create a directory (INSTDIR), where you want to install FL
- unpack the archive into this directory
- create an FL_DIR environment variable, which points to INSTDIR/fl/fl_0.61
- run FL_DIR/bin/fl
Enhancements:
- This release introduces Distributed FL, and can be started as a TCP/IP daemon (Linux only), waiting for requests from other hosts (masters) and working for them as a slave.

MetaTrans::Languages Perl module contains a simple "database" of most of the known languages. Extracted from MARC codes for languages, http://www.loc.gov/marc/languages/.

SYNOPSIS

use MetaTrans::Languages qw(get_lang_by_code get_code_by_lang);

print get_lang_by_code(afr); # prints Afrikaans
print get_code_by_lang(Afrikaans); # prints afr

FUNCTIONS

get_lang_by_code($code)

Returns the name of the language with $code or undef if no language with such a $code is known.

get_code_by_lang($language)

Returns the code of the $language or undef if the language is unknown.

is_known_lang($code)

Returns true if the language with $code exists in the "database", false otherwise.

get_langs_hash

Returns the {code_1 => language_1, code_2 => language_2, ...} hash containing all known languages and their codes.

get_langs_hash_rev

Returns the {language_1 => code_1, language_2 => code_2, ...} hash containing all known languages and their codes.

Open Dice Language project is a language for describing dice rolls.

Open Dice Language is a language for describing dice rolls.

The language is nearly identical to what you see in most role-playing game texts (e.g., "1d20"). It provides several interfaces to the language.

To run in CLI interface mode:

# pushd $ODL_HOME
# java -jar ODL.jar

To run as Widget:

build using `ant widget`
widget is now installed in users widget directory

The Complex Language project is an object oriented programming language intended for scripting or rapid prototyping of applications.
The design goals were to have very few simple but powerful concepts and to be easy to use and easy to learn. The project provides a working interpreter along with a complete specification of the language.
Enhancements:
- This is the first release of the specification and the corresponding interpreter.
- The corresponding library is very poor, and there are probably still bugs in the interpreter.

SML is a "toy" machine language intended to teach basic processor concepts. This website contains an explanation and definition of SML, as well as an interpreter and example SML programs. GPLd source code for the interpreter is available, as well as binaries for Windows and Linux.

A machine language defines a set of instructions that a CPU can execute to perform operations. In other words, a machine language defines what you can do with your computer. Modern processors have very complex instruction sets; however, the simple language described here can give you an understanding of what is happening "under the hood" with your computer.

Machine language is the actual data that is directly run by the processor. Writing a program in machine language can therefore be advantageous if you need to save space or highly optimize your code. However, machine language is also not portable and can be difficult to understand and maintain.

Therefore, almost all code is now written in a higher level language, such as C, C++, Java, or scripting languages such as shell or perl. These languages all have their advantages and disadvantages as well, such as varying levels of portability, maintainability, scalability, and execution speed.

One level higher than machine language is assembly language. Assembly language is basically readable machine language. Instead of writing out the code bit-by-bit, you write out the code as a sequence of human readable instructions, which are then compiled almost directly into machine language.

Assembly language is almost always used instead of machine language when such a direct level of control is needed. For example, some games implement part of their code in assembly in order to maximize execution speed. Assembly can be "inlined" into some higher level languages, like C. This means that the assembly is defined as a callable procedure from within the C code.