The
utility formats the program sources specified as arguments
on the command line in a nice style using
troff(1).
Comments are placed in italics, keywords in bold face,
and the name of the current function is listed down the margin of each
page as it is encountered.
The
utility runs in two basic modes, filter mode (see the
-f
option) or regular mode.
In filter mode
acts as a filter in a manner similar to
tbl(1).
The standard input is passed directly to the standard output except
for lines bracketed by the
troff-like
macros:
.vS
starts processing
.vE
ends processing
These lines are formatted as described above.
The output from this
filter can be passed to
troff(1)
for output.
There need be no particular ordering with
eqn(1)
or
tbl(1).
In regular mode
accepts input files, processes them, and passes them to the postprocessor
for output,
psroff(1)
by default.
In both modes
passes any lines beginning with a decimal point without conversion.
The options are:
-
forces input to be taken from standard input (default if
-f
is specified)
-W
forces output to the (wide) Versatec printer rather than the (narrow)
Varian
-d file
specifies an alternate language definitions
file (default is
/usr/share/misc/vgrindefs
-f
forces filter mode
-h header
specifies a particular header to put on every output page (default is
the file name)
-l
specifies the language to use.
Currently known are
PASCAL
(-l p
)
MODEL
(-l m
)
C
( -l c
or the default),
C++
(-l c++
)
CSH
(-l csh
)
SHELL
(-l sh
)
RATFOR
(-l r
)
MODULA2
(-l mod2
)
YACC
(-l yacc
)
LISP
(-l isp
)
ICON
(-l I
)
and
PERL
(-l perl
)
-n
forces no keyword bolding
-p postproc
use
postproc
to post-process the output,
psroff(1)
by default.
-s pointsize
specifies a point size to use on output (exactly the same as the argument
of a .ps)
-t
similar to the same option in
troff(1)
causing formatted text to go to the standard output
-x
outputs the index file in a ``pretty'' format.
The index file itself is produced whenever
is run with a file called
index
in the current directory.
The index of function
definitions can then be run off by giving
the
-x
option and the file
index
as argument.
The vfontedpr preprocessor assumes that a certain programming style is
followed:
For
C
- function names can be preceded on a line only by spaces, tabs, or an
asterisk.
The parenthesized arguments must also be on the same line.
For
PASCAL
- function names need to appear on the same line as the keywords
function
or
procedure
For
MODEL
- function names need to appear on the same line as the keywords
is beginproc
If these conventions are not followed, the indexing and marginal function
name comment mechanisms will fail.
More generally, arbitrary formatting styles for programs mostly look bad.
The use of spaces to align source code fails miserably; if you plan to
your program you should use tabs.
This is somewhat inevitable since the
font used by
is variable width.
The mechanism of
ctags(1)
in recognizing functions should be used here.
Filter mode does not work in documents using the
-me
or
-ms
macros.
(So what use is it anyway?)
