Apply workaround for ASxxxx macro problem

[TG9541]

@kenyapcomau found a workaround for the bug in ASxxxx (sdasstm8) macro processing described in the SDCC tracker issue 2626:

using octal escapes for characters like , and ; prevents the assembler crash.

Now all headers in forth.asm can use the HEADER macro!

[kenyapcomau]

I have sent a link to this page to Alan Baldwin.

[kenyapcomau]

Reply from Alan:

Ken,

I see how the argument being passed is causing the problem.
A macro expects arguments to be separated by white space or the
delimiter ','. So if the macro is passed an argument as -

HEADER "C" which has no delimiters in the argument "C"
the "C" is passed as the argument.

If the macro is passed an argument as -

HEADER "," which has a delimiter, then the macro believes
there are two arguments " and ".

If the argument contains a ";" then the ; signifies and end of code
and the argument is a single ".

The macro documentation specifies how to pass arguments containing
delimiters as ^/arg/. So the method to pass string arguments with
(or without) delimiters is -

HEADER ^/","/

or with any argument containing white space.
Note that the / character can be any character
not in the string to be passed. The arguments
are just a series of characters and the "
characters have no special meaning to the macro
parser.

I hope this clarifies the problem.

Alan

p.s.:
From the assembler code it appears my checking
of the macro argument count is in the wrong
place and misses detecting the extra arguments
trashing the macro structure, this I will need
to fix. I have attached MT.asm which calls
the macro HEADER over 500 times. Uncommenting
the line containing HEADER a,b will cause a
seg fault.

MT.zip

[TG9541]

Great info, thanks Ken!

Using the notation ^/"..."/ mostly works, but it leaves the special case of HEADER STRCQ ^/"$,""/ which results in the following error message:

forth.asm:3410: Error: <q> missing or improper operators, terminators, or delimiters

Encoding $," as '$\054"' works.

EDIT: encoding as HEADER STRCQ ^/'$,"'/ works, too!