sync with espie@'s latest change to diff(1).

from src/usr.bin/diff/diffreg.c rev 1.67:

improve -p for C++ code: classes definition often have
public:/protected:/private: at the start of line.
This lets the -p scanner just take note of the section and keep
looking for the actual class definition.

Also increase function name bufsize so it shows most of these pesky C++
decls...

OK niallo@ espie@.

1 files changed, 22 insertions, 7 deletions

diff --git a/usr.bin/rcs/diff.c b/usr.bin/rcs/diff.c
index 09d341a47a9..dee9330a61d 100644
--- a/usr.bin/rcs/diff.c
+++ b/usr.bin/rcs/diff.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: diff.c,v 1.12 2007/02/27 07:59:13 xsa Exp $	*/
+/*	$OpenBSD: diff.c,v 1.13 2007/03/27 07:21:21 xsa Exp $	*/
 /*
  * Copyright (C) Caldera International Inc.  2001-2002.
  * All rights reserved.
@@ -229,7 +229,7 @@ static struct context_vec *context_vec_start;
 static struct context_vec *context_vec_end;
 static struct context_vec *context_vec_ptr;
 
-#define FUNCTION_CONTEXT_SIZE	41
+#define FUNCTION_CONTEXT_SIZE	55
 static char lastbuf[FUNCTION_CONTEXT_SIZE];
 static int  lastline;
 static int  lastmatchline;
@@ -1175,6 +1175,8 @@ asciifile(FILE *f)
 	return (1);
 }
 
+#define begins_with(s, pre) (strncmp(s, pre, sizeof(pre)-1) == 0)
+
 static char*
 match_function(const long *f, int pos, FILE *fp)
 {
@@ -1182,6 +1184,7 @@ match_function(const long *f, int pos, FILE *fp)
 	size_t nc;
 	int last = lastline;
 	char *p;
+	char *state = NULL;
 
 	lastline = pos;
 	while (pos > last) {
@@ -1196,11 +1199,23 @@ match_function(const long *f, int pos, FILE *fp)
 			if (p != NULL)
 				*p = '\0';
 			if (isalpha(buf[0]) || buf[0] == '_' || buf[0] == '$') {
-				if (strlcpy(lastbuf, (const char *)buf,
-				    sizeof(lastbuf)) >= sizeof(lastbuf))
-					errx(1, "match_function: strlcpy");
-				lastmatchline = pos;
-				return lastbuf;
+				if (begins_with(buf, "private:")) {
+					if (!state)
+						state = " (private)";
+				} else if (begins_with(buf, "protected:")) {
+					if (!state)
+						state = " (protected)";
+				} else if (begins_with(buf, "public:")) {
+					if (!state)
+						state = " (public)";
+				} else {
+					if (strlcpy(lastbuf, (const char *)buf,
+					    sizeof(lastbuf)) >= sizeof(lastbuf))
+						errx(1,
+						    "match_function: strlcpy");
+					lastmatchline = pos;
+					return lastbuf;
+				}
 			}
 		}
 		pos--;