From 53700fc71f42f9c5831fbccae6aff5fb049c7bc0 Mon Sep 17 00:00:00 2001
From: Alan Carvalho de Assis <acassis@gmail.com>
Date: Wed, 19 Oct 2016 07:22:13 -0600
Subject: [PATCH] Add isblank() macro to ctype.h

---
 include/ctype.h    | 10 ++++++++++
 include/cxx/cctype |  1 +
 2 files changed, 11 insertions(+)

diff --git a/include/ctype.h b/include/ctype.h
index 67dc99e6e1..d3d62b53fd 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -134,6 +134,16 @@
 
 #define isalpha(c)   (islower(c) || isupper(c))
 
+/****************************************************************************
+ * Name: isblank
+ *
+ * Description:
+ *   Checks for blank characters (space or tab)
+ *
+ ****************************************************************************/
+
+#define isblank(c)   (isspace(c) || (c) == '\t')
+
 /****************************************************************************
  * Name: isdigit
  *
diff --git a/include/cxx/cctype b/include/cxx/cctype
index 604bc2c23d..36b62ca8c5 100644
--- a/include/cxx/cctype
+++ b/include/cxx/cctype
@@ -55,6 +55,7 @@
 #undef isprint
 #undef ispunct
 #undef isspace
+#undef isblank
 #undef isupper
 #undef isxdigit
 #undef tolower