summaryrefslogtreecommitdiff
path: root/ctype/ctype.h
diff options
context:
space:
mode:
Diffstat (limited to 'ctype/ctype.h')
-rw-r--r--ctype/ctype.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/ctype/ctype.h b/ctype/ctype.h
index 9469907b27..64f5e4b7a0 100644
--- a/ctype/ctype.h
+++ b/ctype/ctype.h
@@ -104,6 +104,11 @@ __exctype (isblank);
__END_NAMESPACE_C99
#endif
+#ifdef __USE_GNU
+/* Test C for a set of character classes according to MASK. */
+extern int isctype (int __c, int __mask) __THROW;
+#endif
+
#if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
/* Return nonzero iff C is in the ASCII set