In article ,
Hans Bezemer wrote:
>On 18-11-2025 00:25, Paul Rubin wrote:
>> I'm playing with the idea of writing a Roff-like text formatter in
>> Forth. The input is lines of text "blah blech, and this that the
>> other...". The text lines can be arbitrarily long so I don't want to
>> read the entire line into a memory buffer using something like REFILL.
>>
>> Let's say I don't have to worry about individual words overflowing
>> memory though (segfault is not allowed, but it's ok to panic and quit).
>> So the main loop will be to copy an input word to the output buffer and
>> maybe flush the output buffer. The output buffer can be of fixed size.
>>
>> Also, some input lines will be formatting commands like ".i\n" (change
>> font to italic). Those lines should be given to the Forth text
>> interpreter.
>>
>> I guess I could use the FILE word set to write something like getc()
>> with its own buffering, but that seems messy. I'm wondering if this is
>> a common situation and there's an idiomatic solution.
>
>I don't know if it's "idiomatic", but it works. In essence, it reads the
>file binary. If there is something left at the end of the buffer, it
>copies that to the start, adjusts the buffer address and size and
>continues. It doesn't return a word per call, you open the file and it
>applies a quotation to each word parsed (a n --).
That is exactly how it works in ciforth too for file redirection.
(Reading from the console just fills the TIB.)
>
>No, it's not beautiful, but it works. BTW, if you happen to be German
>and your prose contains words that exceed 256 characters, you're on your
>own.
Not beautiful?
>
>Hans Bezemer
Groetjes Albert
--
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The next 5 year plan has as primary goal to advance life expectancy
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