.\" refer.tmac
.\"
.\" This is an interface to 'refer', originally part of 's.tmac'.
.\"
.\" Copyright (C) 2011-2020 Free Software Foundation, Inc.
.\"   Written by Werner Lemberg (wl@gnu.org)
.\"
.\" This file is part of groff.
.\"
.\" groff is free software; you can redistribute it and/or modify it
.\" under the terms of the GNU General Public License as published by
.\" the Free Software Foundation, either version 3 of the License, or
.\" (at your option) any later version.
.\"
.\" groff is distributed in the hope that it will be useful, but WITHOUT
.\" ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
.\" or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
.\" License for more details.
.\"
.\" You should have received a copy of the GNU General Public License
.\" along with this program.  If not, see
.\" <http://www.gnu.org/licenses/>.
.\"
.\" Please send comments to groff@gnu.org.
.
.do nr *groff_refer_tmac_C \n[.cp]
.cp 0
.
.
.\" The following macros must be defined:
.\"
.\"   ref*error                     -- print an error message (in $1)
.\"
.\"   ref*text-label-start          -- start a reference in text
.\"                                    (formatted reference # in $1)
.\"   ref*text-label-end            -- end a reference in text
.\"
.\"   ref*biblio-item-start         -- a reference item with label
.\"                                    (in $1) in the bibliography block
.\"   ref*biblio-item-start-nolabel -- a reference item without label in
.\"                                    the bibliography block
.\"   ref*biblio-item-end           -- end a reference item in the
.\"                                    bibliography block
.\"
.\" The following macros are optional:
.\"
.\"   ref*item-start-hook           -- stuff appended to the ]- macro
.\"   ref*item-end-hook             -- stuff prepended to the ][ macro
.\"   ref*biblio-start-hook         -- stuff appended to the ]< macro
.\"   ref*biblio-end-hook           -- stuff appended to the ]> macro
.\"
.\" The following strings must be defined:
.\"
.\"   ref*refnum-start              -- start reference number formatting
.\"                                    in footnote
.\"   ref*refnum-end                -- end reference number formatting
.\"                                    in footnote
.\"
.\"   [.                            -- start reference number in text
.\"                                    (directly inserted by 'refer')
.\"   .]                            -- end reference number in text
.\"                                    (directly inserted by 'refer')
.\"
.\" Here is the specification of the five possible reference styles
.\" provided by 'refer'.  The example entries are taken from the ms
.\" macro package.
.\"
.\"   ref*spec!0  Q A T S V N P I C D O      -- other
.\"   ref*spec!1  Q A T J S V N P I C D O    -- journal article
.\"   ref*spec!2  Q A T S V P I C D O        -- book
.\"   ref*spec!3  Q A T B E S V P I C D O    -- article within book
.\"   ref*spec!4  Q A T R G P I C D O        -- technical report
.\"
.\" Now the setup for the formatting of reference entries.  The given
.\" example entries for the various strings are taken from the ms macro
.\" package.
.\"
.\" Each string defines five arguments which are passed to a macro, with
.\" the meaning as below.  Please refer to the man page of 'refer' for
.\" more details on the fields.  To allow fine-tuning, two levels are
.\" implemented: For the refer field X and style Y the string
.\" 'ref*spec!X:Y' is looked up.  If it doesn't exist, the string
.\" 'ref*spec!X' is used instead.
.\"
.\"   arg 1  the punctuation character to use to separate this field
.\"          from the previous field
.\"   arg 2  a string to insert after the punctuation character of the
.\"          previous field (normally a space)
.\"   arg 3  a string with which to prefix this field
.\"   arg 4  a string with which to postfix this field
.\"   arg 5  a string to add after the punctuation character supplied
.\"          by the next field
.\"
.\"                  1  2   3        4     5
.\"   ------------------------------------------------------------------
.\"   ref*spec!A     ,  " "                       -- author name
.\"   ref*spec!B     "" " " "in \fI" ""    "\fP"  -- bk title of article
.\"   ref*spec!D     "" " " "("      ")"          -- date of publication
.\"   ref*spec!E     ,  " " "ed. "                -- editor
.\"   ref*spec!G     "" " " "("      ")"          -- US Gov. ordering #
.\"   ref*spec!J     ,  " " "\fI"    ""    "\fP"  -- journal name
.\"   ref*spec!N     "" "(" ""       ")"          -- issue number
.\"   ref*spec!O     .  " "                       -- other information
.\"   ref*spec!P     ,  " " "p.\~"                -- page
.\"   ref*spec!PP    ,  " " "pp.\~"               -- page range
.\"   ref*spec!T     ,  " " "\\*Q"   ""    "\\*U" -- journal title
.\"   ref*spec!T:0   ,  " " "\fI"    ""    "\fP"  -- book title (other)
.\"   ref*spec!T:2   ,  " " "\fI"    ""    "\fP"  -- book title (book)
.\"   ref*spec!V     "" " " "\fB"    "\fR"        -- volume number
.\"
.\"   ref*spec!dflt  ,  " "                       -- all other entries
.
.
.if d ref*normal-print .nx
.
.\" start of reference
.de ]-
.	ref*reset
.	if d ref*item-start-hook \
.		ref*item-start-hook
..
.
.
.\" end of reference
.de ][
.	if d ref*item-end-hook \
.		ref*item-end-hook
.	ie d ref*spec!\\$1 \
.		ref*build \\$1 \\*[ref*spec!\\$1]
.	el \{\
.		ref*error "unknown reference type '\\$1'"
.		ref*build 0 \\*[ref*spec!0]
.	\}
.	ref*print
.	rm ref*string
.	rm [F
..
.
.
.\" period before reference
.ds <. .\"
.
.\" period after reference
.ds >. \" empty
.
.\" comma before reference
.ds <, ,\"
.
.\" comma after reference
.ds >, \" empty
.
.
.\" start collected references
.de ]<
.	als ref*print ref*end-print
.	if d ref*biblio-start-hook \
.		ref*biblio-start-hook
..
.
.
.\" end collected references
.de ]>
.	als ref*print ref*normal-print
.	if d ref*biblio-end-hook \
.		ref*biblio-end-hook
..
.
.
.de ref*reset
.	rm [A [B [C [D [E [G [I [J [N [O [P [Q [R [S [T [V
.	rm ref*string
..
.
.
.de ref*normal-print
.	ie d [F \
.		ref*text-label-start \
                  "\\*[ref*refnum-start]\\*([F\\*[ref*refnum-end]"
.	el \
.		ref*text-label-start \&
.	nop \\*[ref*string]
.	ref*text-label-end
..
.
.
.de ref*end-print
.	ie d [F \
.		ref*biblio-item-start "\\*([F."
.	el \
.		ref*biblio-item-start-nolabel
.	nop \\*[ref*string]
.	ref*biblio-item-end
..
.
.
.als ref*print ref*normal-print
.
.de ref*build
.	rm ref*string ref*post-punct
.	nr ref*suppress-period 1
.	nr ref*style \\$1
.	shift
.	while \\n[.$] \{\
.		if d [\\$1 \{\
.			ie d ref*add-\\$1 \
.				ref*add-\\$1 \\n[ref*style]
.			el \
.				ref*add-dflt \\$1 \\n[ref*style]
.		\}
.		shift
.	\}
.	\" now add a final period
.	ie d ref*string \{\
.		if !\\n[ref*suppress-period] \
.			as ref*string .
.		if d ref*post-punct \{\
.			as ref*string "\\*[ref*post-punct]
.			rm ref*post-punct
.		\}
.	\}
.	el \
.		ds ref*string
..
.
.
.de ref*add-T
.	ie d ref*spec!T:\\$1 \
.		ref*field T \\*[ref*spec!T:\\$1]
.	el \
.		ref*field T \\*[ref*spec!T]
.	if r [T \
.		nr ref*suppress-period \\n([T
..
.
.de ref*add-P
.	ie \\n([P>0 \{\
.		ie d ref*spec!PP:\\$1 \
.			ref*field P \\*[ref*spec!PP:\\$1]
.		el \
.			ref*field P \\*[ref*spec!PP]
.	\}
.	el \{\
.		ie d ref*spec!P:\\$1 \
.			ref*field P \\*[ref*spec!P:\\$1]
.		el \
.			ref*field P \\*[ref*spec!P]
.	\}
..
.
.de ref*add-J
.	ie ref*spec!J:\\$1 \
.		ref*field J \\*[ref*spec!J:\\$1]
.	el \
.		ref*field J \\*[ref*spec!J]
..
.
.de ref*add-D
.	ie ref*spec!D:\\$1 \
.		ref*field D \\*[ref*spec!D:\\$1]
.	el \
.		ref*field D \\*[ref*spec!D]
..
.
.de ref*add-E
.	ie ref*spec!E:\\$1 \
.		ref*field E \\*[ref*spec!E:\\$1]
.	el \
.		ref*field E \\*[ref*spec!E]
..
.
.de ref*add-G
.	ie ref*spec!G:\\$1 \
.		ref*field G \\*[ref*spec!G:\\$1]
.	el \
.		ref*field G \\*[ref*spec!G]
..
.
.de ref*add-B
.	ie ref*spec!B:\\$1 \
.		ref*field B \\*[ref*spec!B:\\$1]
.	el \
.		ref*field B \\*[ref*spec!B]
..
.
.de ref*add-O
.	ie ref*spec!O:\\$1 \
.		ref*field O \\*[ref*spec!O:\\$1]
.	el \
.		ref*field O \\*[ref*spec!O]
.	if r [O \
.		nr ref*suppress-period \\n([O
.\" XXX
.\"	el \
.\"		nr ref*suppress-period 1
..
.
.de ref*add-A
.	ie ref*spec!A:\\$1 \
.		ref*field A \\*[ref*spec!A:\\$1]
.	el \
.		ref*field A \\*[ref*spec!A]
.	if r [A \
.		nr ref*suppress-period \\n([A
..
.
.de ref*add-V
.	ie ref*spec!V:\\$1 \
.		ref*field V \\*[ref*spec!V:\\$1]
.	el \
.		ref*field V \\*[ref*spec!V]
..
.
.de ref*add-N
.	ie ref*spec!N:\\$1 \
.		ref*field N \\*[ref*spec!N:\\$1]
.	el \
.		ref*field N \\*[ref*spec!N]
..
.
.de ref*add-dflt
.	ie ref*spec!dflt:\\$2 \
.		ref*field \\$1 \\*[ref*spec!dflt:\\$2]
.	el \
.		ref*field \\$1 \\*[ref*spec!dflt]
..
.
.
.\" First argument is the field letter.
.\" Second argument is the punctuation character to use to separate this
.\" field from the previous field.
.\" Third argument is a string to insert after the punctuation character
.\" of the previous field (normally a space).
.\" Fourth argument is a string with which to prefix this field.
.\" Fifth argument is a string with which to postfix this field.
.\" Sixth argument is a string to add after the punctuation character
.\" supplied by the next field.
.de ref*field
.	if d ref*string \{\
.		ie d ref*post-punct \{\
.			if !\\n[ref*suppress-period] \
.				as ref*string "\\$2\"
.			as ref*string "\\*[ref*post-punct]\\$3\"
.			rm ref*post-punct
.		\}
.		el \
.			as ref*string "\\$2\\$3\"
.	\}
.	as ref*string "\\$4\\*([\\$1\\$5
.	if \\n[.$]>5 \
.		ds ref*post-punct "\\$6\"
.	nr ref*suppress-period 0
..
.
.
.cp \n[*groff_refer_tmac_C]
.do rr *groff_refer_tmac_C
.
.\" Local Variables:
.\" mode: nroff
.\" fill-column: 72
.\" End:
.\" vim: set filetype=groff textwidth=72:
