Re:
> **** Bound violation or range error (TRAPS 12).
> $SET 'X9=TRUE'$
> $IF 'NOT X9'$
Pascal allows *meaningful* flag names. I'd replace X9 with
what it really means. (e.g., $set 'testing = true'$ or some such)
> bbuf : string [maxmsg+8];
...
> bbuf := ' &j000L';
At this point, bbuf (a string) has 7 characters in it.
> bbuf [1] := chr(27);
BTW, You can combine the above two:
bbuf := #27'&j000L';
> ilen := ASCII ( len, -10, bbuf [6]);
The above works "correctly" only if len is in the range -99 to +999,
because a value outside that range would "overflow" onto the "j" and then
the "&" ... note, of course, that this isn't a problem in your case
since maxmsg is < 1000. I'd either document that or add a check to
ensure that len is in the range 0..999 (since negative len values can
cause other problems, I'm hoping you'll check for that earlier).
> strmove ( len, msg, 1, bbuf, 8 );
The above is my candidate for what's causing the error ... if len is
an unexpected value.
To tell for sure, I'd want a compiler listing with $code_offsets on$,
which allows easy correlation of the abort location to source code.
Example of code_offsets on....
2 8.000 1 dest := '1234567';
3 9.000 1 source := 'cat';
4 10.000 1 strmove (3, source, 1, dest, 8);
5 11.000 1
5 12.000 1 writeln ('dest = ', dest);
6 13.000 1
6 14.000 1 end.
C O D E O F F S E T S
PROGRAM
STMT OFFSET STMT OFFSET STMT OFFSET STMT OFFSET
2 7C 4 B8 5 118 6 1B0
3 A0
If my process aborted at PROGRAM+c0, I'd know that's within stmt 4
(which starts at byte offset $b8 and runs through $117). Stmt 4 is at
line number 10 (according to the "4 10.000" line and "5 11.000" lines)
I'd also suggest checking the value of len (to make sure it's in the
range 0..maxmsg).
Stan
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Stan Sieler
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