46 lines
1.6 KiB
Text
Executable file
46 lines
1.6 KiB
Text
Executable file
#/bin/sh
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# RETRO12: Interactive Listener
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# ---------------------------------------------------------------------
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# This is a bit of trickery using shell scripting and RRE to implement
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# an interactive environment for Retro.
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# ---------------------------------------------------------------------
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# To work as expected, input should process as it's entered and not be
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# line buffered. I use `stty` to set this mode.
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stty cbreak
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# ---------------------------------------------------------------------
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# Next, copy the actual Retro source into a temporary file for RRE to
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# process.
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cat >/tmp/_listener.forth << 'EOF'
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~~~
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{{
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:version (-) @Version #100 /mod putn $. putc putn ;
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:banner (-) 'RETRO_12_(rx- puts version $) putc nl
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EOM putn '_MAX,_TIB_@_1025,_Heap_@_ puts here putn nl ;
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:eol? (c-f) [ ASCII:CR eq? ] [ ASCII:LF eq? ] [ ASCII:SPACE eq? ] tri or or ;
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:valid? (s-sf) dup s:length n:-zero? ;
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:ok (-) compiling? [ nl 'Ok_ puts ] -if ;
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:gets (-s) [ #1025 buffer:set
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[ getc dup buffer:add eol? ] until
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buffer:start s:chop ] buffer:preserve ;
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---reveal---
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:listen (-) banner ok repeat gets valid? [ interpret ok ] [ drop ] choose again ;
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}}
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listen
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~~~
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EOF
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# ---------------------------------------------------------------------
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# Now use RRE (in the current directory) to run the program.
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./rre /tmp/_listener.forth
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# ---------------------------------------------------------------------
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# Finally, clean everything up and use `stty` to restore the normal
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# input buffering mode.
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rm -f /tmp/_listener.forth
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stty -cbreak
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