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authorChristian Hitz <christian.hitz@aizo.com>2011-10-12 09:32:05 +0200
committerScott Wood <scottwood@freescale.com>2012-01-26 16:09:02 -0600
commit5454ddbc9b6be1b3a8fe1018bda697ac2b33b202 (patch)
treee95d6010a9508907b67b29a1d67dda78ab9b420d /lib/string.c
parentff8a8a718341e42af8642f01ce630d4a77c58f82 (diff)
nand: Sanitize ONFI strings.
[backport from linux commit 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe] This is part of the synchronization with the nand driver to the Linux 3.0 state. Signed-off-by: Christian Hitz <christian.hitz@aizo.com> Cc: Scott Wood <scottwood@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'lib/string.c')
-rw-r--r--lib/string.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/string.c b/lib/string.c
index 2c4f0ec9a11..c3ad055e2ca 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -214,6 +214,45 @@ char * strrchr(const char * s, int c)
}
#endif
+
+/**
+ * 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;
+}
#ifndef __HAVE_ARCH_STRLEN
/**
* strlen - Find the length of a string