From 7fb5e36da3b4e873793036f5e7feaccbde924b10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Tue, 20 Jul 2021 01:48:01 +0200
Subject: Clear fields after each entry

---
 example.t |  6 +++---
 refs.lex  | 28 +++++++++++++++++++++++++---
 2 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/example.t b/example.t
index de0f5f5..b6051b7 100644
--- a/example.t
+++ b/example.t
@@ -1,14 +1,14 @@
 .SH
 References
 .XP
-%au	В. А. Богородицкий
+%au	Богородицкий, В. А.
 %al	Bogorodickij
 %da	1887
 %ti	Курс грамматики русского языка. Часть 1-ая: Фонетика
 %ci	Варшава
 %pu	Типография Михаила Земкевича
 .XP
-%au	J. Baudouin de Courtenay
+%au	de Courtenay, J. Baudouin
 %da	1972
 %ti	The Difference between Phonetics and Psychophonetics
 %bo	A Baudouin de Courtenay Anthology
@@ -17,7 +17,7 @@ References
 %ci	Bloomington
 %pu	Indiana University Press
 .XP
-%au	M. E. Lesk
+%au	Lesk, M. E.
 %ti	Some Applications of Inverted Indexes on the UNIX System
 %bo	UNIX Programmer's Manual
 %vo	2b
diff --git a/refs.lex b/refs.lex
index 714a79e..5440777 100644
--- a/refs.lex
+++ b/refs.lex
@@ -35,6 +35,7 @@ main(int argc, char *argv[0])
 	yylex();
 }
 
+/* Save entry field. */
 void
 field(char *t)
 {
@@ -56,15 +57,36 @@ field(char *t)
 	exit(1);
 }
 
+/* Print formatted entry. */
 void
 entry()
 {
+
+#define EI(a, b) a ? a : b
+
 	(pf("% (%).\n", e.au, e.da) || pf("%.\n", e.au));
-	(pf("%.\n\\fI%\\fP.\n", e.ti, e.bo ? e.bo : e.jo)
-	|| pf("%.\n", e.ti));
+	if (*e.bo || *e.jo){
+		pf("%.\n", e.ti);
+		pf("\\fI%\\fP", EI(e.bo, e.jo));
+		pf(" ("ED" %)", e.ed);
+		pf(".\n");
+	}else
+		pf("\\fI%\\fP.\n", e.ti);
+	pf(TR" %.\n", e.tr);
 	(pf("%: %.\n", e.ci, e.pu) || pf("%.\n", e.pu));
+
+#define CL(a) *a = 0
+
+	CL(e.au); CL(e.al);
+	CL(e.bo); CL(e.ci);
+	CL(e.da); CL(e.ed);
+	CL(e.jo); CL(e.no);
+	CL(e.pg); CL(e.pu);
+	CL(e.se); CL(e.ti);
+	CL(e.tr); CL(e.vo);
 }
 
+/* Print formatted text if given strings are non-empty. */
 int
 pf(char *fmt, ...)
 {
@@ -85,7 +107,7 @@ pf(char *fmt, ...)
 		switch(*fmt){
 		case '%':
 			p = va_arg(ap, char *);
-			if(!p || !p[0])
+			if(!p || !*p)
 				return 0;
 			strcat(buf, p);
 			break;
-- 
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