Re: Re: [Groff] checkeq functionality available?

[rbh]

I use groff on Solaris whiich comes with checkeq.

eqn (geqn) recognizes equations delimited by the .EQ and .EN pairs but
also permits inline equations/symbols using spefified delimiters in an
ordinary text line, e.g.,

.EQ
delim $$
.EN

This line of text shows that $ alpha $ is the first letter of the Greek 
alphabet.

I currently have over 200 pages of lecture notes in groff format, with equations
on each page.

If one writes  $ alpha   ...   geqn will search the document for the closing $. 
geqn
spits out a lot of error messages which are not very helpful in finding the
offending delimiter.

The text below has a missing delimiter at line 32.
The result of processin with geqn is

groff -ms -e junk.trf > j
geqn:junk.trf:73:fatal error: end of file before `$'

The output of checkeq is

rbh>checkeq junk.trf
junk.trf:
   New delims $$, line 3
   $$ in EQ, line 3
   18 line $$, lines 32-49
   18 line $$, lines 49-66
   Unfinished $$

This output states that the delimiters were defined in line 3, that there is
a FORBIDDEN delimited equation that is more than one line. The fact that it 
starts
at line 32 is a hint. Of course the later errors are related to the fact that
the $$ are out of sequence.

The operation of checkeq is as follows
LOOK for new delimiters defined in the .EQ/.EN pair, 
        .EQ
        delim [begin_character ][end_character]
        .EN
(note one can use a $@ instead of the easier $$)
scan through the text, ignoring anything in within .EQ/.EN and look for
the delimeter sets on a line of text. If delimeter extends beyond the end of a 
line,
write an error message.

For technical proposals with US budgets, the $ symbol also represents a dollar.
So
        .EQ
        delim $$
        .EN
        technical text
        
        reset the symbol
        .EQ
        delim !!
        .EN
        budget information $100,000.00 for this advise

        reset back to useful equation
        .EQ
        delim $$
        .EN
        technical text

Robert B. Herrmann
Professor of Geophysics
Saint Louis University
3507 Laclede Avenue
St. Louis, MO 63103

TEL: 314 977 3120
FAX: 314 977 3117
Email: address@hidden

------

.EQ
delim $$
.EN
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
$ alpha $ is listed here.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
$ alpha  is listed here.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
\$ alpha \$ is listed here.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
$ alpha $  is listed here.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.
This is a test.