CW(CT) XENIX System V CW(CT)
Name
cw, checkcw, cwcheck - Prepares constant-width text for
troff.
Syntax
cw [ -lxx ] [ -rxx ] [ -fn ] [ -t ] [ +t ] [ -d ] [ file ...
]
checkcw [ -lxx ] [ -rxx ] file ...
cwcheck [ -lxx ] [ -rxx ] file ...
Description
cw prepares troff(CT) input files that contain text in the
constant-width (CW) font for typesetting.
Because the CW font contains a nonstandard set of characters
and requires different character and interword spacing from
standard fonts, documents that use the CW font must be
preprocessed by cw. Typical usage is:
cw file | troff ...
The checkcw and cwcheck programs check to see that the left
and right delimiters, as well as the .CW/.CN pairs, are
properly balanced. They print out all incorrect lines.
The options for cw, checkcw, cwcheck are:
-lxx Designates the one- or two-character string xx as
the left delimiter. If xx is omitted, the left
delimiter is undefined, which is the default
setting.
-rxx Designates the one- or two-character string xx as
the right delimiter. The left and right delimiters
may be different.
-fn Mounts the CW font in font position n; acceptable
values for n are 1, 2, and 3. The default is 3,
replacing the bold font. This option is only useful
at the beginning of a document, and can only be used
with cw.
-t Turns transparent mode off. This option can only be
used with cw.
+t Turns transparent mode on. (This is the default.)
This option can only be used with cw.
-d Prints current option settings on the standard
error, in the form of troff(CT) comment lines. This
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CW(CT) XENIX System V CW(CT)
option is meant for debugging, and can only be used
with cw.
The left and right delimiters perform the same function as
the .CW/.CN requests; they are meant, however, to enclose CW
words or phrases in running text. cw treats text enclosed
by delimiters exactly like text bracketed by .CW/.CN pairs.
For aesthetic reasons, spaces in text bracketed by .CW/.CN
pairs have the same width as any other CW character.
However, spaces between delimiters are half as wide, so that
they are the same width as spacing in the rest of the text,
though not adjustable.
Delimiters have no special meaning inside .CW/.CN pairs.
Cw recognizes five requests. The requests look like
troff(CT) macros (see EXAMPLES below), and are copied by cw
onto its output. Thus, they can be defined by the user as
troff(CT) macros.
The five requests are:
.CW Marks the start of text to be set in the CW font.
.CW takes the same options, in the same format, that
are available on the cw command line.
.CN Marks the end of text to be set in the CW font; .CN
takes the same options that are available on the cw
command line.
.CD option(s)
Changes delimiters and/or settings of other options;
takes the same options as the cw command line.
.CP arg1 arg2 arg3 ...
Sets the odd-numbered arguments in the CW font and
the even-numbered arguments in the prevailing font.
The arguments are delimited like rtroff(CT) macro
arguments.
.PC arg1 arg2 arg3 ...
Same as .CP, except that the even-numbered (rather
than odd-numbered) arguments are set in the CW font,
and the odd-numbered arguments are set in the
prevailing font.
Except for the .CD request and the nine special four-
character names listed in the table below, every character
between the .CW and .CN requests is taken literally and
output as is. The -t option turns off this feature (called
transparent mode), and applies normal troff(CT) rules to the
CW text.
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CW(CT) XENIX System V CW(CT)
Text typeset with the CW font resembles the output of
terminals and lineprinters. This font is often used to
typeset examples of programs and computer output in
documents such as user guides and programming texts. The CW
font contains the 94 printing ASCII characters:
abcdefghijklmnopqrstuvwxyz
ABCDEFGHIJKLMNOPQRSTUVWXYZ
0123456789
!$&()`'*+@.,/:;=?[]|-_^~"<>{}#\
It also contains eight non-ASCII characters represented by
four-character troff(CT) names
__________________________________________
| Character Symbol Troff Nam|
|_________________________________________|
| ``Cents'' sign / \(ct |
| EBCDIC ``not'' sign \(no |
| Left arrow <- \(<- |
| Right arrow -> \(-> |
| Down arrow \(da |
| Vertical single quote ' \(fm |
| Control-shift indicator - \(dg |
| Visible space indicator [] \(sq |
| Hyphen - \(hy |
|_________________________________________|
The hyphen is a synonym for the minus sign (-).
Examples
The following are typical definitions of the .CW and .CN
macros. They are meant to be used with the mm(CT) macro
package:
.de CW Begins definition
.DS I Display start, indented
.ps 9 9 point type
.vs 10.5p Vertical spacing 10.5 points
.ta 16m/3u 32m/3u 48m/3u 64m/3u 80m/3u 96m/3u Sets tabs
.. Ends definition
.de CN Begins definition
.ta 0.5i 1i 1.5i 2i 2.5i 3i 3.5i 4i 4.5i 5i 5.5i 6i Resets tabs
.vs Resets vertical spacing
.ps Resets point size
.DE Ends display
.. Ends definition
When set in running text, the CW font is, by default, set in
the same point size as the rest of the text. In displayed
matter, it can often be set one point smaller than the
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CW(CT) XENIX System V CW(CT)
prevailing point size. (The displayed definitions of .CW
and .CN above are one point smaller than the running text on
this page.) When the .CW font is set in 9-point type, there
are 12 characters per inch.
If a document that contains CW text also contains tables and
equations, the order of preprocessing should be cw, tbl, and
eqn. Usually, the tables contained in such documents will
not contain any CW text, although it is possible to have
elements of the table set in the CW font; care must be taken
that tbl(CT) format information is not modified by cw.
Attempts to set equations in the CW font are not likely to
be either pleasing or successful.
In the CW font, overstriking is most easily accomplished
with backspaces. ( <- represents a backspace.) Because
spaces (and, therefore, backspaces) are half as wide between
delimiters as inside .CW/.CN pairs (see above), two
backspaces are required for each overstrike between
delimiters.
Files
/usr/lib/font/ftCW CW font-width table
See Also
eqn(CT), mmt(CT), tbl(CT), troff(CT)
Warning
Text preprocessed by cw must be set on a typesetter equipped
with the CW font.
Notes
Do not use periods (.) or backslashes (\) as delimiters.
Certain CW characters do not fit well with certain Times
Roman characters, such as a CW ampersand (&) followed by a
Times Roman comma(,); in such cases, use troff(CT) half- and
quarter-spaces. See also Notes under troff(CT).
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