From 7baead578db7e47aedfcd3a5a21a69b9f37630d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eric=20B=C3=A9nard?= <eric@eukrea.com>
Date: Thu, 5 Jul 2012 12:22:45 +0200
Subject: [PATCH] string: add strim for ONFI code
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Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 include/linux/string.h |  3 +++
 lib/string.c           | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)

diff --git a/include/linux/string.h b/include/linux/string.h
index 62d743ee5..afd0aa603 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -93,6 +93,9 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
 #ifndef __HAVE_ARCH_MEMCHR
 extern void * memchr(const void *,int,__kernel_size_t);
 #endif
+extern char * skip_spaces(const char *);
+
+extern char *strim(char *);
 
 #ifdef __cplusplus
 }
diff --git a/lib/string.c b/lib/string.c
index 28650883c..db4f2ae7d 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -567,3 +567,42 @@ void *memchr(const void *s, int c, size_t n)
 #endif
 EXPORT_SYMBOL(memchr);
 
+/**
+ * skip_spaces - Removes leading whitespace from @str.
+ * @str: The string to be stripped.
+ *
+ * Returns a pointer to the first non-whitespace character in @str.
+ */
+char *skip_spaces(const char *str)
+{
+	while (isspace(*str))
+		++str;
+	return (char *)str;
+}
+
+/**
+ * strim - Removes leading and trailing whitespace from @s.
+ * @s: The string to be stripped.
+ *
+ * Note that the first trailing whitespace is replaced with a %NUL-terminator
+ * in the given string @s. Returns a pointer to the first non-whitespace
+ * character in @s.
+ */
+char *strim(char *s)
+{
+	size_t size;
+	char *end;
+
+	s = skip_spaces(s);
+	size = strlen(s);
+	if (!size)
+		return s;
+
+	end = s + size - 1;
+	while (end >= s && isspace(*end))
+		end--;
+	*(end + 1) = '\0';
+
+	return s;
+}
+EXPORT_SYMBOL(strim);