PicoC is a very small C interpreter for scripting. It was originally written as a script language for a UAV's on-board flight system. It's also very suitable for other robotic, embedded and non-embedded applications.
The core C source code is around 3500 lines of code. It's not intended to be a complete implementation of ISO C but it has all the essentials. When compiled it only takes a few k of code space and is also very sparing of data space. This means it can work well in small embedded devices. It's also a fun example of how to create a very small language implementation while still keeping the code readable.
picoc is now feature frozen. Since it's important that it remain small it's intended that no more major features will be added from now on. It's been tested on x86-32, x86-64, powerpc, arm, ultrasparc, HP-PA and blackfin processors and is easy to port to new targets.
picoc can be compiled for a UNIX/Linux/POSIX host by typing "make".
The test suite can be run by typing "make test".
The readline library is necessary in order to compile picoc.
platform.h is where you select your platform type and specify the includes etc. for your platform.
platform_XXX.c contains support functions so the compiler can work on your platform, such as how to write characters to the console etc..
platform_library.c contains your library of functions you want to make available to user programs.
There's also a clibrary.c which contains user library functions like printf() which are platform-independent.
Porting the system will involve setting up suitable includes and defines in platform.h, writing some I/O routines in platform_XXX.c, putting whatever user functions you want in platform_library.c and then changing the main program in picoc.c to whatever you need to do to get programs into the system.
platform.h is set to UNIX_HOST by default so tests can be easily run on a UNIX system. You'll need to specify your own host setup dependent on your target platform.
picoc is published under the "New BSD License". http://www.opensource.org/licenses/bsd-license.php
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