retroforth/example/amalgamate.retro

# Amalgamate

The standard RETRO system is built using the Nga VM[1] and a
copy of the image exported as a C source file[2]. I sometimes
prefer to have these as a single file for easier sharing. This
is a quick little tool to combine them.

Output will be written to stdout.

## References

[1] vm/nga-c/retro.c
[2] vm/nga-c/image.c

## Code

Include compilation instructions and enable i/o devices.

~~~
'/*_Build_with_`cc_-lm_-O2_retro-unix.c_-o_retro`_*/ s:put nl nl

{ 'FLOATS
  'FILES
  'UNIX
  'RNG
  'CLOCK
  'SCRIPTING
} [ '#define_ENABLE\_%s s:format s:put nl ] a:for-each nl
~~~

Then extract and generate the single file source.

~~~
{{
  :include-file
    #10 + s:chop 'vm/nga-c/ s:prepend here swap file:slurp here s:put ; 

  :source:line
    dup '#include_" s:begins-with?
    [ include-file ] [ s:put nl ] choose ;

---reveal---

  :amalgamate
    'vm/nga-c/retro.c [ source:line ] file:for-each-line ;
}}

amalgamate
~~~