Furlang

Copyright 2012 Matthew Mole <[email protected]>, Peter Sandy <[email protected]>

Available at: https://github.com/gairne/furlang

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WARNING
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This is a naive interpreter and is full of vulnerabilities.
This will not be maintained and is a tool for learning and experience.
DO NOT use this in a production environment, including safety-critical and economically-critical environments.


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BUILDING
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make clean && make


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RUNNING
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./furlang example

The example program puts a load of numbers on the stack, adds them, subtracts a few etc... then prints two results.

For more information #define DEBUG and DEBUG_PRINTSTACK in intepreter.c

At the moment, the interpreter reads in two characters at a time per instruction.
The first character is the opcode. The second character is the operand (optional in some cases).

Valid opcodes are:
0 - Pop and add the top two integers on the stack and push the result
1 - Load an integer literal on the stack
2 - Pop and subtract the penultimate-top integer on the stack by the top integer on the stack and push the result
3 - Pop and multiply the top two integers on the stack and push the result
4 - Pop and divide the penultimate-top integer on the stack by the top integer on the stack and push the result
5 - Print the top of the stack as an integer