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.\" manual page for cawf(1)
.\"
.\"
.\" Copyright (c) 1991 Purdue University Research Foundation,
.\" West Lafayette, Indiana 47907. All rights reserved.
.\"
.\" Written by Victor A. Abell <abe@cc.purdue.edu>, Purdue
.\" University Computing Center. Not derived from licensed software;
.\" derived from awf(1) by Henry Spencer of the University of Toronto.
.\"
.\" Permission is granted to anyone to use this software for any
.\" purpose on any computer system, and to alter it and redistribute
.\" it freely, subject to the following restrictions:
.\"
.\" 1. The author is not responsible for any consequences of use of
.\" this software, even if they arise from flaws in it.
.\"
.\" 2. The origin of this software must not be misrepresented, either
.\" by explicit claim or by omission. Credits must appear in the
.\" documentation.
.\"
.\" 3. Altered versions must be plainly marked as such, and must not
.\" be misrepresented as being the original software. Credits must
.\" appear in the documentation.
.\"
.\" 4. This notice may not be removed or altered.
.\"
.\" Some of the stuff in this file is a bit contorted, because it's also
.\" the regression-test input.
.nr ES 5n
.de ES
.PP
.in +\\n(ESu
.nf
..
.de EE
.in -\\n(ESu
.fi
.PP
..
.de PT
.ie \\n(.$>1 .TP "\\$2"
.el .TP
.ie !'\\$1'' \\$1
.el \(bu
..
.ds Nr \fInroff\fR
.TH CAWF 1 "November, 1992"
.BY "Purdue University"
.SH NAME
cawf, nroff \- C version of the nroff-like, Amazingly Workable (text) Formatter
.SH SYNOPSIS
.B cawf
[
.BI \-c config
] [
.BI \-d device
] [
.B \-e
] [
.BI \-f font
] [
.B \-h
] [
.BI \-m acros
] [ file ... ]
.SH DESCRIPTION
.if t .tm OOPS -- CAWF THINKS IT'S TROFF!!!
.I Cawf
formats the text from the input \fIfile\fR(s)
(standard input if none)
in an approximation of \*(Nr.
It comes closest to duplicating \*(Nr's
.B man
or
.B ms
macro package styles.
It has some limited support for \*(Nr's
.B me
macros.
.SH OPTIONS
Options must precede file names.
.TP
.BI \-c config
defines an alternate path to the device configuration file.
Normally the device configuration file is found in
.I device.cf
in the
.I cawf
library (see the
.B FILES
section).
.IP
The device configuration file contains device character strings for
selecting fonts and the bold or italic type faces.
See the
.B DEVICES
section for more information.
.TP
.BI \-d device
specifies the name of the output device.
There are three built\-in devices \- ANSI, NONE and NORMAL \- and
other devices may be defined in the device configuration file.
See the
.B DEVICES
section for more information.
.IP
The NORMAL device is the default.
.TP
.B \-e
directs
.I cawf
to issue an eject (FF or ^L) after the last page.
.TP
.BI \-f font
specifies the one font for the device, declared with the
.BI \-d device
option, that is to be used for the
entire document.
.I Font
must match a font associated with the device's stanza in the device
configuration file.
See the
.B DEVICES
section for more information.
.IP
No
.I font
may be specified for the built\-in devices ANSI, NONE or NORMAL.
.TP
.B \-h
requests a help display.
.TP
.BI \-m acro
specifies the macro file to be used.
The standard
.I cawf
distribution supplies macro files to support ``\-man'', ``\-me'' or ``\-ms''.
.I Cawf
finds a macro file by constructing its name from `m',
.I acro
and
.B .mac
\- e. g.,
.BI \-m an
is converted to
.BR man.mac .
The default directory for macro files is defined when
.I cawf
is compiled; it's \fIC:\\SYS\\LIB\\CAWF\fP in the MS\-DOS environment;
.I /usr/lib/cawf
in the UNIX environment.
.TP
file ...
are the names of files containing \*(Nr source text.
.SH NROFF COMPATIBILITY
.I Cawf
accepts the following raw \*(Nr requests:
.LP
.\e" .ad .bp .br .ce .de .di .ds
.el .fi .fl .ft .i0 .ie .if .in
.it .lg .li .ll .ls .na .ne .nf
.nr .ns .pl .po .ps .rm .rn .rr
.rs .so .sp .ta .ti .tm .tr
.LP
and the following in-text codes:
.ES
\e$ \e% \e* \e" \ec \ef \eh \ek
\en \es \ew
.EE
plus the full list of \*(Nr/\c
.I troff
special characters in
the original V7 \fItroff\fR manual.
.PP
Many restrictions are present; the behavior in general is a subset of
\*(Nr's. Of particular note are the following:
.IP \(bu 2
The fully supported nroff request control character is the period.
There is limited support for the non\-break, acute accent control
character.
.PT
Point sizes do not exist;
.B .ps
is ignored.
.PT
Special vertical spacing \- the
.B .vs
request included \- is ignored.
.PT
Conditionals cover only the numeric comparisons >, =, <, >= and <= on
.BR \en(.$ ;
string com\%par\%isons between a macro parameter and a literal;
.B n
(always true);
and
.BR t
(always false).
Only single line input is accepted from conditionals;
multi\-line input \- e.g., \\(\fIanything\fP\\) \- is not supported.
.PT
The handling of strings is generally primitive.
.IP \(bu
Horizontal motion via
.B \eh
must be supplied with a number register interpolation and must be
positive - e. g.,
.BR \ew\en(NN ,
where the value in NN is >= 0.
.IP \(bu
The
.B \ek
function is reliable only after TAB characters, so it is useful only
for measuring table positions.
.IP \(bu
The
.B .di
request only turns output on and off \- any macro name is ignored.
.IP \(bu
Expressions - e. g.,
.B .sp
- are reasonably general, but the
.BR | ,
.BR & ,
and
.BR :\&
operators do not exist, there must be white space between the end of the \*(Nr
function and the beginning of the expression, and
.B \ew
requires that quote (') be used as the delimiters.
.B \ew
counts the characters inside the quotes and scales the result in ens,
so that, for example, \ew'\e(bu' equals 4n, and \ew'\e(bu'/1n equals 4.
.PT
The only acceptable count for the
.B .it
request is one,
and it is effective only with
.BR man ,
.B me
or
.B ms
macros.
.PT
The default scaling factor is `v' for the
.BR .ne ,
.BR .sp ,
and
.B .pl
raw \*(Nr requests; it is `u' for
.BR .nr ;
and `n' for
.BR .in ,
.BR .ll ,
.BR .ls ,
.BR .po ,
.BR .ta
and
.BR .ti .
(A different scaling factor may be specified with a trailing character.)
.PT
Some obsolete or meaningless requests \-
.BR .i0 ,
.B .lg
and
.B .li
\&\- are silently ignored.
.P
White space at the beginning of lines,
and embedded white space within lines is dealt with properly.
Sentence terminators at ends of lines are understood to imply
extra space afterward in filled lines.
Tabs are im\%plemented crudely and not exactly, although
usually they work as expected.
Hyphenation is done only at explicit hyphens, em-dashes, and \*(Nr
discretionary hyphens.
By default bold and italic characters are emulated with backspacing and
overprinting, but the
.B \-d
and
.B \-f
options, combined with the contents of the device configuration file,
may be used to generate special codes for bold and italic characters.
(See the
.B DEVICES
section for more information.)
.SH "MAN MACROS"
The
.B man
macro set replicates the full V7 manual macros,
plus a few semi-random oddballs.
The full list is:
.ES
\&.AT .B .BI .BR .BY .DE .DS .DT .HP .I
\&.IB .IP .IR .IX .LP .NB .P .PD .PP .RB
\&.RE .RI .RS .SH .SM .SS .TH .TP .UC
.EE
.B .BY
and
.B .NB
each take a single string argument (respectively, an indi\%cation of
authorship and a note about the status of the manual page) and arrange
to place it in the page footer.
.B .AT
and
.B .IX
do nothing.
.SH "ME MACROS"
The
.B me
macro subset has been derived from the
.I cawf
.B ms
macros by Chet Creider <creider@csd.uwo.ca>.
It includes:
.ES
\&.(l .(q .)l .)q .b .bu .i .ip .lp .np
\&.pp .r .sh .sm .u .uh
.EE
The .(l C and .(l L options are supported.
In addition, the .AB, .AE, .AI, .AU, .DA, .ND, .TL and .UX macros have
been retained from the
.B ms
set, and the .XP macro has been borrowed from the Berkeley additions to the
.B ms
macro set.
.SH "MS MACROS"
The
.B ms
macro set is a substantial subset of the V7 manuscript macros.
The macros are:
.ES
\&.AB .AE .AI .AU .B .CD .DA .DE .DS .I
\&.ID .IP .LD .LG .LP .ND .NH .NL .PP .QE
\&.QP .QS .R .RE .RP .RS .SH .SM .TL .TP
\&.UL .UX
.EE
Size changes are recognized but ignored, as are
.B .RP
and
.BR .ND .
.B .UL
just prints its argument in italics.
.BR .DS / .DE
does not do a keep,
nor do any of the other macros that normally imply keeps.
.LP
The
.B DY
string variable is available.
The
.BR PD ,
.BR PI ,
and
.BR LL
number registers exist and can be changed.
.SH "HEADERS AND FOOTERS"
.I Cawf
allows the placement of text into the five line header and
footer sections from the
.BR LH ,
.BR CH ,
.BR RF ,
.BR LF ,
.BR CF ,
and
.B RF
string variables, via the control of the
.B .^b
request:
.LP
.ta \w'.^b HF 0'u+3n
.nf
\&.^b fh 1 enables header string placement on the first page
\&.^b fh 0 disables header string placement on the first page
\&.^b HF 1 enables header/footer string placement
\&.^b HF 0 disables header/footer string placement
.fi
.LP
There are appropriate
.B .^b
requests in the distribution
.BR man ,
.B me
and
.B ms
macro files.
(The
.B me
and
.B ms
macro files use another
.B .^b
request, \fB.^b NH\fP, to enable numbered header processing.)
.SH OUTPUT
The default output format supported by
.IR cawf ,
in its distributed form,
is that appropriate to a dumb terminal,
using overprinting for italics (via underlining) and bold.
The \*(Nr special characters are printed as some vague approximation
(it's sometimes extremely vague) to their correct appearance.
.PP
One part of
.IR cawf 's
knowledge of the output device, related to the formation of characters,
is established by a device file, which is read before the user's input.
The search for it begins in
.IR cawf 's
library directory, under the name \fIterm\fP.\fBdev\fP
(where \fIterm\fR is the value of the TERM environment variable).
Failing to find that,
.I cawf
searches for
.BR dumb.dev .
(See the
.B FILES
section for a description of the path to
.IR cawf 's
library directory.)
The device file
uses special internal requests
to set up resolution, special characters
and more normal \*(Nr functions to set up page length, etc.
.PP
.I Cawf
has limited support for fonts special forms of bold and italic characters.
It is provided through the
.B \-c
.IR config ,
.BI \-d device
and
.BI \-f font
options.
See the
.B DEVICES
section for more information.
.PP
Note the distinction between the device and the output device configuration
files.
The device file typically defines characters and constant output parameters.
The output device configuration file defines font and type face codes.
It is usually not necessary to define a separate device file for each
device represented in the output device configuration file \- the
.I dumb.dev
device file will suffice for almost all representations.
.SH DEVICES
.I Cawf
supports primitive output device configuration for font and type face
control.
One font may be selected for the entire document by directing
.I cawf
to issue a font selection control character string at the beginning
of the document, and control character strings may be selected for
switching between the bold, italic and Roman type faces.
.PP
The
.B \-c
.IR config,
.BI \-d device
and
.BI \-f font
options direct the font and type face selections.
.PP
The
.BI \-d device
option specifies the name of the device.
.I Cawf
has three built\-in devices \- ANSI, NONE and NORMAL.
When the ANSI device is selected,
.I cawf
issues the ANSI shadow mode control codes, ``ESC [ 7 m'', to represent
the bold face;
the ANSI underscore control codes, ``ESC [ 4 m'', to represent the italic
face;
and the ANSI control codes, ``ESC [ 0 m'', to represent the ROMAN face.
No
.BI \-f font
specification is permitted with the ANSI device.
.PP
When the NONE device is selected,
.I cawf
uses no special output codes to represent the type faces.
No
.BI \-f font
specification is permitted with the ANSI device.
.PP
The NORMAL output device is the default.
When it's selected,
.I cawf
overprints each bold character two times, using three issuances of each
bold character, separated by backspace characters;
it issues an underscore and backspace before each italic character.
No
.BI \-f font
specification is permitted with the ANSI device.
The
.IR bsfilt (1)
filter may be used to further process the backspace codes output for
a NORMAL device.
.PP
All other devices named in the
.BI \-d device
option must be represented by a stanza in the device configuration file.
The device configuration file is usually contained in
.I device.cf
in
.IR cawf's
library directory (see the
.B FILES
section for more information).
An alternate device configuration file path may be specified with the
.BI \-c config
option.
.PP
The
.B DEVICE CONFIGURATION FILE
section describes the organization of the device configuration file.
It is easy to add devices to the
.I device.cf
supplied in the
.I cawf
distribution.
.PP
The
.BI \-f font
option may be used with the
.BI \-d device
option, when the appropriate stanza in the device configuration file
contains an entry for the named
.IR font .
The
.B DEVICE CONFIGURATION FILE
section describes how fonts are defined in device configuration file
stanzas.
.SH DEVICE CONFIGURATION FILE
The device configuration file defines the special character codes
necessary to direct output devices to select fonts and to produce
bold, italic and Roman type faces.
.PP
The configuration file is usually found in
.I device.cf
in
.IR cawf 's
library directory (see the
.B FILES
section for more information).
It is organized into two main parts \- comments and device stanzas.
Comments are any lines that begin with the pound sign (`#') character.
They are informational only and
.I cawf
ignores them.
.I Cawf
also ignores empty lines, so they may be used as vertical white space.
.PP
Stanzas name devices and define their font and type face control strings.
A stanza begins with the name of the device, starting at the beginning
of a line and occupying the entire line.
The body of the stanza, defining fonts and type faces, is formed of
lines beginning with white space (a TAB or space characters) that
directly follow the device name.
.PP
Individual lines of the stanza body contain a key character, followed
by a equal sign, followed by the font name (if a font key) and the
output device control codes.
.I Cawf
issues the font control codes once, at the beginning of output, so
only one font may be selected.
The type face control codes are issued at each change of type face.
.PP
The key characters are:
.ne 4
.DS
b for bold
f for font definition
i for italic
r for Roman
.DE
The `b', `i' and `r' key codes are followed by an equal sign (`=') and
their control code definition.
The `f' key code is followed by an equal sign (`='), the font name,
another equal sign and the font control code definition.
.PP
Control code definitions may contain any printable ASCII characters.
Non\-printable characters may be encoded in octal notation with the `\\nnn'
form or in hexadecimal with the `\\xnn' form.
The special code, `\\E' (or `\\e') represents the ESC control
character (\\033 or \\x1b).
.PP
Here's a sample showing the definition for the HP LaserJet III.
The stanza name is ``lj3''.
All its non\-printable characters are ESCs; the first is coded in
octal form; the second with '\\E'; the rest, in hexadecimal form.
TAB is used as the leading white space character for the stanza
body lines.
.DS
# HP LaserJet III
lj3
b=\\033(s7B
i=\\E(s1S
r=\\x1b(s0B\\x1b(s0S
f=c10=\x1b&l0O\x1b(8U\x1b(s0p12h10v0s0b3T
f=c12ibm=\x1b&l0O\x1b(10U\x1b(s0p10.00h12.0v0s0b3T
f=lg12=\x1b&l0O\x1b(8U\x1b(s12h12v0s0b6T
.DE
.PP
The distribution
.I device.cf
file defines the following devices and fonts.
.LP
.ta \w'kxp1180'u+3n +\w'Italic:'u+3n +\w'bps10'u+6n
.nf
.ne 3
epson dot matrix printer in Epson FX-86e/FX-800 mode
Bold: Double-strike
Fonts: none
.ne 4
ibmppds IBM Personal Printer Data Stream (PPDS) protocol
Bold: Double-strike
Italic: Underline
Fonts: none
.ne 12
kxp1124 Panasonic KX\-P1124 dot matrix printer in PGM mode
Bold: Emphasized
Fonts: c10 10 Characters Per Inch (CPI) Courier
c12 12 CPI Courier
bps10 10 CPI Bold PS
bps12 12 CPI Bold PS
p10 10 CPI Prestige
p12 12 CPI Prestige
s10 10 CPI Script
s12 12 CPI Script
ss10 10 CPI Sans Serif
ss12 12 CPI Sans Serif
.ne 10
kxp1180 Panasonic KX\-P1180 dot matrix printer in PGM mode
Bold: Emphasized
Fonts: c10 10 Characters Per Inch (CPI) Courier
c12 12 CPI Courier
bps10 10 CPI Bold PS
bps12 12 CPI Bold PS
p10 10 CPI Prestige
p12 12 CPI Prestige
ss10 10 CPI Sans Serif
ss12 12 CPI Sans Serif
.ne 6
lj3 HP LaserJet III
Fonts: c10 10 point, 12 Characters Per Inch (CPI)
Courier
c12ibm 12 point, 10 CPI Courier, IBM\-PC
Symbol Set
lg12 12 point, 12 CPI Letter Gothic
.ne 4
vgamono VGA monochrome monitor for MS\-DOS
(ANSI.SYS driver required for MS\-DOS)
Italic: Reverse-video
Fonts: none
.SH FILES
.I Cawf
resource files are located in the
.I cawf
library directory \- \fI C:\\SYS\\LIB\\CAWF\fP, the MS\-DOS environment
default;
or
.IR /usr/lib/cawf ,
the UNIX environment default.
These defaults can be overridden by the CAWFLIB environment variable,
or changed in the cawflib.h header file.
.ta \w'device.cf'u+3n
.nf
common common device-independent initialization
device.cf output device configurations
*.dev device-specific initialization
m*.mac macro package files
.SH DIAGNOSTICS
Unlike
.IR nroff ,
.I cawf
complains whenever it sees unknown requests.
All diagnostics appear on the standard error file.
.ad
.SH HISTORY
Vic Abell of Purdue University <abe@cc.purdue.edu> derived
.I cawf
from
.IR awf ,
\&``the Amazingly Workable (text) Formatter,''
written by Henry Spencer of the University of Toronto.
The Toronto work was a supplement to the C News project.
The Purdue effort was aimed at producing a C language version that
would run on small systems, particularly MS\-DOS ones.
The adaptation of the
.B me
macros was done by Chet Creider <creider@csd.uwo.ca>.
Chet also contributed ideas for device, font and type face support.
.PP
The MS\-DOS version of
.I cawf
has been compiled with version 2.5 of Microsoft's Quick-C compiler.
It runs under the Mortis Kern Systems Toolkit KornShell,
.IR ksh (1),
and COMMAND.COM.
.SH BUGS
Nroff and troff mavens will have many complaints.
Some may even represent bugs and not deliberate omissions.
.PP
Watch out for scaling factors - especially on requests like
.BR \ew .
.PP
The overprinting required to create bold and italicized characters is
tiresome on a slow printer.
The
.IR bsfilt (1)
post\-filter from this distribution may be used to alleviate that
nuisance by managing the backspacing codes from
.IR cawf 's
NORMAL device output.
.PP
The printing of bold and italic characters is sometimes better handled by
special printer codes.
Use
.IR cawf 's
.B \-c
.IR config ,
.BI \-d device
and
.BI \-f font
options to produce special font and device output control codes.
.PP
.I Cawf
has a small amount of built-in code for the
.BR man ,
.B me
and
.B ms
macro packages, but none for any others.
.PP
The stacking for the
.B .so
request is limited.
.SH SEE ALSO
bsfilt(1),
colcrt(1),
man(7),
me(7),
ms(7)
and
nroff(1).