fatal lexer errors

[David Relson]

Matthias,

The flex compiled parser code uses "#define YY_FATAL_ERROR(msg)
yy_fatal_error(msg)" to output an error message and exit.  This behavior
needs to be modified as having bogofilter abort isn't acceptable
behavior.

My first idea was to use something like "fputs(msg, stderr); return
EOF".  However YY_FATAL_ERROR is used in functions that don't return
values and functions that return pointers.  The different usages
preclude use of any return statement.

If we were using C++, we could use exceptions (throw/catch).  However
we're using C.  So we have is setjmp/longjmp.  The attached patch does
the job.

What d'ya think?

David
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: patch.yy_fatal_error.0904.txt
URL: <https://www.bogofilter.org/pipermail/bogofilter-dev/attachments/20030904/10d642bd/attachment.txt>