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-rw-r--r--wctype/wctype.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/wctype/wctype.h b/wctype/wctype.h
index 710275888a..c4f4f6ca02 100644
--- a/wctype/wctype.h
+++ b/wctype/wctype.h
@@ -145,6 +145,13 @@ extern int iswupper __P ((wint_t __wc));
    in the previous subclause.  */
 extern int iswxdigit __P ((wint_t __wc));
 
+/* Test for any wide character that corresponds to a standard blank
+   wide character or a locale-specific set of wide characters for
+   which `iswalnum' is false.  */
+# ifdef __USE_GNU
+extern int iswblank __P ((wint_t __wc));
+# endif
+
 /*
  * Extensible wide-character classification functions: 7.15.2.2.
  */
@@ -280,6 +287,10 @@ extern int __iswupper_l __P ((wint_t __wc, __locale_t __locale));
    in the previous subclause.  */
 extern int __iswxdigit_l __P ((wint_t __wc, __locale_t __locale));
 
+/* Test for any wide character that corresponds to a standard blank
+   wide character or a locale-specific set of wide characters for
+   which `iswalnum' is false.  */
+extern int __iswblank_l __P ((wint_t __wc, __locale_t __locale));
 
 /* Construct value that describes a class of wide characters identified
    by the string argument PROPERTY.  */