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-rw-r--r--lib/libc/locale/isblank.314
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/libc/locale/isblank.3 b/lib/libc/locale/isblank.3
index 7c920f4..12e54a0 100644
--- a/lib/libc/locale/isblank.3
+++ b/lib/libc/locale/isblank.3
@@ -32,7 +32,7 @@
.\" @(#)isblank.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd June 4, 1993
+.Dd October 6, 2002
.Dt ISBLANK 3
.Os
.Sh NAME
@@ -66,6 +66,17 @@ representable as an
.Li unsigned char
or the value of
.Dv EOF .
+.Sh COMPATIBILITY
+Although
+.Fn isblank
+accepts arguments outside of the range of the
+.Vt "unsigned char"
+type in locales with large character sets,
+this is a
+.Bx 4.4
+extension and the
+.Fn iswblank
+function should be used instead for maximum portability.
.Sh RETURN VALUES
The
.Fn isblank
@@ -73,6 +84,7 @@ function returns zero if the character tests false and
returns non-zero if the character tests true.
.Sh SEE ALSO
.Xr ctype 3 ,
+.Xr iswblank 3 ,
.Xr multibyte 3 ,
.Xr ascii 7
.Sh STANDARDS
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