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https://git.sr.ht/~crc_/retroforth
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119 lines
2.5 KiB
Forth
119 lines
2.5 KiB
Forth
This is a quick little thing to generate some statistics
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from the RETRO image and VM, along with some introspection
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to identify sigil handlers and word classes.
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# Memory Use
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First, memory. This is easy due to the defined constants
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and queries provided by RETRO.
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~~~
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nl 'Memory: s:put nl nl
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EOM '__Total_memory:_%n\n s:format s:put
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FREE '__Free_memory:__%n\n s:format s:put
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here '__Used_memory:__%n\n s:format s:put
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~~~
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# Dictionary
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Next, some statistics on the dictionary. The header sizing
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would need to be adjusted if you add or remove fields from
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them.
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The header contains fields for:
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link to prior
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address
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pointer to class handler
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null terminated string with the name
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So the size is 4 cells (the three fields and null terminator)
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plus the length of the name.
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~~~
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nl 'Dictionary: s:put nl nl
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#0 [ d:name s:length #4 + + ] d:for-each
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'__Headers_consume_%n\n s:format s:put
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#0 [ d:name s:length + n:inc ] d:for-each
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'__Names_consume_%n\n s:format s:put
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~~~
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Determine the number of words in the dictionary.
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~~~
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#0 [ drop n:inc ] d:for-each
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'__%n_names_defined\n s:format s:put
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~~~
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Determine the average length of a word name.
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~~~
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#0 [ d:name s:length + ] d:for-each
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#0 [ drop n:inc ] d:for-each
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/ '__Average_name_length:_%n\n s:format s:put
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~~~
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And without the sigils...
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~~~
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#0 #0 [ d:name dup $: s:index-of n:inc + s:length + [ n:inc ] dip ] d:for-each swap /
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'__Average_name_without_namespace:_%n\n s:format s:put
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~~~
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Longest name are...
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~~~
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#0 [ d:name s:length n:max ] d:for-each
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'__Longest_names_are_%n_characters\n s:format s:put
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~~~
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# Identify Classes
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Word classes are conventionally named as:
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class:<name>
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This prints the names of words matching them. It also demonstrates
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constructing an array of the names, which can be adapted for other
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purposes.
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~~~
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nl 'Classes: s:put nl nl
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:identify-classes (-a)
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here #0 ,
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[ d:name dup 'class: s:contains-string?
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&, &drop choose ] d:for-each
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here over - n:dec over store ;
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sp sp identify-classes [ s:put sp ] a:for-each nl
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~~~
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# Identify Sigils
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Sigils are named as:
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sigil:<character>
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Unlike classes, this is not merely a convention, but an actual
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requirement.
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The process for obtaining an array of them and printing it is
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the same as with the class handlers.
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~~~
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nl 'Sigils: s:put nl nl
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:identify-sigils (-a)
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here #0 ,
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[ d:name dup 'sigil: s:contains-string?
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&, &drop choose ] d:for-each
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here over - n:dec over store ;
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sp sp identify-sigils [ s:put sp ] a:for-each nl
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nl
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~~~
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