VGRIND(1) User Commands VGRIND(1)


NAME


vgrind - grind nice program listings

SYNOPSIS


vgrind [-2fntwx] [-d defs-file] [-h header] [-l language]
[-s n] [-o pagelist] [-P printer] [-T output-device] filename...


DESCRIPTION


The vgrind utility formats the program sources named by the filename
arguments in a nice style using troff(1). Comments are placed in italics,
keywords in bold face, and as each function is encountered its name is
listed on the page margin.


vgrind runs in two basic modes, filter mode or regular mode. In filter
mode, vgrind 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 for output. There need be no particular ordering
with eqn(1) or tbl(1).


In regular mode, vgrind accepts input filenames, processes them, and
passes them to troff for output. Use a hyphen (`-') to specify standard
input; otherwise, vgrind will exit without attempting to read from the
standard input. Filenames must be specified after all other option
arguments.


In regular mode, if the -t or -P option is specified, the output is:

o emitted (in troff format) to stdout if the -t option is
specified.

o printed (as PostScript) to the named printer if the -P option
is specified.


Otherwise, the output is:

o printed (as PostScript) on the system default printer, if one
is defined, and the command's stdout is a tty.

o emitted (as PostScript) to stdout if it is not a tty (that is,
if stdout is a pipe or a redirect to a file).


In both modes, vgrind passes any lines beginning with a decimal point
without conversion.

OPTIONS


The following options are supported:

-2
Produces two-column output. Specifying this option
changes the default point size to 8 (as if the -s8 option
were supplied). It also arranges for output to appear in
landscape mode.


-f
Forces filter mode.


-n
Does not make keywords boldface.


-w
Considers TAB characters to be spaced four columns apart
instead of the usual eight.


-x
Outputs the index file in a "pretty" format. The index
file itself is produced whenever vgrind is run with a
file called index that is present in the current
directory. The index of function definitions can then be
run off by giving vgrind the -x option and the file index
as argument.


-d defs-file
Specifies an alternate language definitions file (default
is /usr/lib/vgrindefs).


-h header
Specifies a header to appear in the center of every
output page. Use quotes to specify headers with embedded
spaces.


-l language
Specifies the language to use. Among the languages
currently known are: Bourne shell (-lsh), C (-lc, the
default), C++ (-lc++), C shell (-lcsh), emacs MLisp
(-lml), FORTRAN (-lf), Icon (-lI), ISP (-i), LDL (-lLDL),
Model (-lm), Pascal (-lp), and RATFOR (-lr).


-P printer
Sends output to the named printer.


-s n
Specifies a point size to use on output (exactly the same
as the argument of a troff .ps point size request).


vgrind passes the following options to the formatter specified by the
TROFF environment variable. See ENVIRONMENT VARIABLES.

-t
Similar to the same option in troff; that is,
formatted text goes to the standard output.


-o pagelist
Prints only those pages whose page numbers appear in
the comma-separated pagelist of numbers and ranges. A
range N-M means pages N through M; an initial -N
means from the beginning to page N; and a final N-
means from N to the end.


-T output-device
Formats output for the specified output-device.


OPERANDS


The following operand is supported:

filename
Name of the program source to be processed by vgrind. Use `-'
to specify the standard input.


ENVIRONMENT VARIABLES


In regular mode, vgrind feeds its intermediate output to the text
formatter given by the value of the TROFF environment variable, or to
/usr/bin/troff if this variable is not defined in the environment. This
mechanism allows for local variations in troff's name.

FILES


index

file where source for index is created


/usr/lib/vgrindefs

language descriptions


/usr/lib/vfontedpr

preprocessor


/usr/share/lib/tmac/tmac.vgrind

macro package


SEE ALSO


csh(1), ctags(1), eqn(1), tbl(1), troff(1), attributes(5), vgrindefs(5)

BUGS


vgrind assumes that a certain programming style is followed:

C
Function names can be preceded on a line only by SPACE, TAB,
or an asterisk (*). The parenthesized arguments must also be
on the same line.


FORTRAN
Function names need to appear on the same line as the keywords
function or subroutine.


MLisp
Function names should not appear on the same line as the
preceding defun.


Model
Function names need to appear on the same line as the keywords
is beginproc.


Pascal
Function names need to appear on the same line as the keywords
function or procedure.


If these conventions are not followed, the indexing and marginal function
name comment mechanisms will fail.


More generally, arbitrary formatting styles for programs usually give
unsightly results. To prepare a program for vgrind output, use TAB rather
than SPACE characters to align source code properly, since vgrind uses
variable width fonts.


The mechanism of ctags(1) in recognizing functions should be used here.


The -w option is annoying, but there is no other way to achieve the
desired effect.


The macros defined in tmac.vgrind do not coexist gracefully with those of
other macro packages, making filter mode difficult to use effectively.


vgrind does not process certain special characters in csh(1) scripts
correctly.


The tmac.vgrind formatting macros wire in the page height and width used
in two-column mode, effectively making two column output useless for
paper sizes other than the standard American size of 8.5 inches by 11
inches. For other paper sizes, it is necessary to edit the size values
given in tmac.vgrind. A better solution would be to create a troff output
device specification intended specifically for landscape output and
record size information there.


March 3, 2000 VGRIND(1)