libc: Add labs() to stdlib

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

2 files changed, 26 insertions, 1 deletions

diff --git a/libc/stdlib/Makefile.inc b/libc/stdlib/Makefile.inc
index 6d1123e0..22417dfb 100644
--- a/libc/stdlib/Makefile.inc
+++ b/libc/stdlib/Makefile.inc
@@ -13,7 +13,7 @@
 SUBDIRS += $(LIBCDIR)/stdlib
 
 STDLIB_OBJS = error.o atoi.o atol.o strtol.o strtoul.o \
-	      rand.o
+	      rand.o labs.o
 
 STDLIB = $(LIBCDIR)/stdlib/built-in.o
 $(STDLIB): $(STDLIB_OBJS:%=$(LIBCDIR)/stdlib/%)
diff --git a/libc/stdlib/labs.c b/libc/stdlib/labs.c
new file mode 100644
index 00000000..9b68bb27
--- /dev/null
+++ b/libc/stdlib/labs.c
@@ -0,0 +1,25 @@
+/******************************************************************************
+ * Copyright (c) 2017 IBM Corporation
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ *     IBM Corporation - initial implementation
+ *****************************************************************************/
+
+#include <stdlib.h>
+
+/**
+ * labs() -	Computes the absolute value of long integer
+ * @n:		long integer number
+ *
+ * Returns the absolute value of the long integer argument
+ */
+
+long int labs(long int n)
+{
+	return  (n > 0) ? n : -n;
+}