From 0b38528b1ed620cf8afcbd2dc24687537a6d863f Mon Sep 17 00:00:00 2001
From: Ingo Schwarze <schwarze@openbsd.org>
Date: Sun, 18 Jul 2010 17:00:26 +0000
Subject: Text ending in a full stop, exclamation mark or question mark should
 not flag the end of a sentence if:

1) The punctuation is followed by closing delimiters
and not preceded by alphanumeric characters, like in
"There is no full stop (.) in this sentence"

or

2) The punctuation is a child of a macro
and not preceded by alphanumeric characters, like in
"There is no full stop
.Pq \&.
in this sentence"

"looks fine" to kristaps@; tested by jmc@ and sobrado@
---
 libmandoc.h  |  4 ++--
 man.c        |  2 +-
 mandoc.c     | 21 ++++++++++++---------
 mdoc.c       |  2 +-
 mdoc_macro.c |  4 ++--
 5 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/libmandoc.h b/libmandoc.h
index 35184b0c..5059e600 100644
--- a/libmandoc.h
+++ b/libmandoc.h
@@ -1,6 +1,6 @@
 /*	$Id$ */
 /*
- * Copyright (c) 2009 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -29,7 +29,7 @@ time_t		 mandoc_a2time(int, const char *);
 #define		 MTIME_REDUCED		(1 << 1)
 #define		 MTIME_MDOCDATE		(1 << 2)
 #define		 MTIME_ISO_8601		(1 << 3)
-int		 mandoc_eos(const char *, size_t);
+int		 mandoc_eos(const char *, size_t, int);
 int		 mandoc_hyph(const char *, const char *);
 
 __END_DECLS
diff --git a/man.c b/man.c
index 95313d7a..c11068b0 100644
--- a/man.c
+++ b/man.c
@@ -409,7 +409,7 @@ man_ptext(struct man *m, int line, char *buf, int offs)
 	 */
 
 	assert(i);
-	if (mandoc_eos(buf, (size_t)i))
+	if (mandoc_eos(buf, (size_t)i, 0))
 		m->last->flags |= MAN_EOS;
 
 descope:
diff --git a/mandoc.c b/mandoc.c
index fa136a03..80972279 100644
--- a/mandoc.c
+++ b/mandoc.c
@@ -240,8 +240,10 @@ mandoc_a2time(int flags, const char *p)
 
 
 int
-mandoc_eos(const char *p, size_t sz)
+mandoc_eos(const char *p, size_t sz, int enclosed)
 {
+	const char *q;
+	int found;
 
 	if (0 == sz)
 		return(0);
@@ -252,8 +254,9 @@ mandoc_eos(const char *p, size_t sz)
 	 * propogate outward.
 	 */
 
-	for ( ; sz; sz--) {
-		switch (p[(int)sz - 1]) {
+	found = 0;
+	for (q = p + sz - 1; q >= p; q--) {
+		switch (*q) {
 		case ('\"'):
 			/* FALLTHROUGH */
 		case ('\''):
@@ -261,22 +264,22 @@ mandoc_eos(const char *p, size_t sz)
 		case (']'):
 			/* FALLTHROUGH */
 		case (')'):
+			if (0 == found)
+				enclosed = 1;
 			break;
 		case ('.'):
-			/* Escaped periods. */
-			if (sz > 1 && '\\' == p[(int)sz - 2])
-				return(0);
 			/* FALLTHROUGH */
 		case ('!'):
 			/* FALLTHROUGH */
 		case ('?'):
-			return(1);
+			found = 1;
+			break;
 		default:
-			return(0);
+			return(found && (!enclosed || isalnum(*q)));
 		}
 	}
 
-	return(0);
+	return(found && !enclosed);
 }
 
 
diff --git a/mdoc.c b/mdoc.c
index 6e997042..d8ea5918 100644
--- a/mdoc.c
+++ b/mdoc.c
@@ -721,7 +721,7 @@ mdoc_ptext(struct mdoc *m, int line, char *buf, int offs)
 
 	assert(buf < end);
 
-	if (mandoc_eos(buf+offs, (size_t)(end-buf-offs)))
+	if (mandoc_eos(buf+offs, (size_t)(end-buf-offs), 0))
 		m->last->flags |= MDOC_EOS;
 
 	return(1);
diff --git a/mdoc_macro.c b/mdoc_macro.c
index 0dede49e..d5e946cb 100644
--- a/mdoc_macro.c
+++ b/mdoc_macro.c
@@ -610,7 +610,7 @@ append_delims(struct mdoc *m, int line, int *pos, char *buf)
 		 * knowing which symbols break this behaviour, for
 		 * example, `.  ;' shouldn't propogate the double-space.
 		 */
-		if (mandoc_eos(p, strlen(p)))
+		if (mandoc_eos(p, strlen(p), 0))
 			m->last->flags |= MDOC_EOS;
 	}
 
@@ -1266,7 +1266,7 @@ blk_part_imp(MACRO_PROT_ARGS)
 	 */
 
 	if (n && MDOC_TEXT == n->type && n->string)
-		if (mandoc_eos(n->string, strlen(n->string)))
+		if (mandoc_eos(n->string, strlen(n->string), 1))
 			n->flags |= MDOC_EOS;
 
 	/* Up-propogate the end-of-space flag. */
-- 
cgit