[src/trunk]: src/lib/libc/gen Clarify that strunvisx() and strnunvisx() take ...

[bad <bad%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/6554029612e5
branches:  trunk
changeset: 998940:6554029612e5
user:      bad <bad%NetBSD.org@localhost>
date:      Wed May 08 15:37:41 2019 +0000

description:
Clarify that strunvisx() and strnunvisx() take the same flags as unvis().
Document VIS_NOESCAPE for unvis().
Bump date.

diffstat:

 lib/libc/gen/unvis.3 |  24 +++++++++++++++---------
 1 files changed, 15 insertions(+), 9 deletions(-)

diffs (55 lines):

diff -r 2291398a536c -r 6554029612e5 lib/libc/gen/unvis.3
--- a/lib/libc/gen/unvis.3      Wed May 08 14:44:42 2019 +0000
+++ b/lib/libc/gen/unvis.3      Wed May 08 15:37:41 2019 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: unvis.3,v 1.29 2017/10/24 19:14:55 abhinav Exp $
+.\"    $NetBSD: unvis.3,v 1.30 2019/05/08 15:37:41 bad Exp $
 .\"
 .\" Copyright (c) 1989, 1991, 1993
 .\"    The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"     @(#)unvis.3    8.2 (Berkeley) 12/11/93
 .\"
-.Dd March 12, 2011
+.Dd May 8, 2019
 .Dt UNVIS 3
 .Os
 .Sh NAME
@@ -99,16 +99,18 @@
 .Pp
 The
 .Fn strunvisx
-function does the same as the
+and
+.Fn strnunvisx
+functions do the same as the
 .Fn strunvis
-function,
-but it allows you to add a flag that specifies the style the string
+and
+.Fn strnunvis
+functions,
+but take a flag that specifies the style the string
 .Ar src
 is encoded with.
-Currently, the supported flags are:
-.Dv VIS_HTTPSTYLE
-and
-.Dv VIS_MIMESTYLE .
+The meaning of the flag is the same as explained below for
+.Fn unvis .
 .Pp
 The
 .Fn unvis
@@ -157,6 +159,10 @@
 .Fa flag
 argument is also used to specify the encoding style of the source.
 If set to
+.Dv VIS_NOESCAPE
+.Fn unvis
+will not decode backslash escapes.
+If set to
 .Dv VIS_HTTPSTYLE
 or
 .Dv VIS_HTTP1808 ,