> > Actually, my motivation was a lot simpler. I wasn't sure if the regular > expression I use to match an error being indicated by the amforth > interpreter really covered all cases. That expression (without the > delimiting double quotes included below) is: > > " \?\? -\d+ \d+ \r\n> $" > > Is it correct?
Yes it is. > I spent some time looking at the main interpreter trying > to verify it but I don't read assembly and forth fluently enough yet to > be sure without investing more time than I had available. It a bit difficult indeed. The messages get printed by the words in the prompts.asm file, coordinated in quit.asm. The first " ?? " comes from PROMPTERROR which prints the two numbers too. After that quit calls the PROMPTRDY which generates the line feed and the "> ". The two numbers are printed using . (DOT) which makes it possible to get both positive and negative numbers. The not-so-obvious code in quit makes sure, that the first number is always negative and the second number is always positive. (THROW Code resp the value of >IN). That means that a THROW with a positive code number does not print anything, THROWs with a negative number trigger the error prompt as described above. The second consequence is that the size of the input buffer into which >IN points should never exceed 32KB. > If the above regular expression will catch all errors explicitly > indicated by the interpreter, then I think it would be reasonable to > change the default behavior to *not* generate an error on output as it > *will still generate an error* if the error regular expression matches. As long as nobody changes QUIT and the prompt words, the regex will work. > Matthias> > http://amforth.svn.sourceforge.net/viewvc/amforth/trunk/tools/amforth-term.py?view=log > > Wonderful. I don't really see any need for this to live outside the > amforth repository, so if I get a chance to make further improvements > I'll prepare patches against the code there. Great. Matthias ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
