lib/string.c: strsep_no_empty()

This adds a new helper which is like strsep, except that it skips empty
tokens.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/string.c b/lib/string.c
index 4fb566ea610f..462247073b5e 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -522,6 +522,25 @@ char *strsep(char **s, const char *ct)
 EXPORT_SYMBOL(strsep);
 #endif
 
+/**
+ * strsep_no_empt - Split a string into tokens, but don't return empty tokens
+ * @s: The string to be searched
+ * @ct: The characters to search for
+ *
+ * strsep() updates @s to point after the token, ready for the next call.
+ */
+char *strsep_no_empty(char **s, const char *ct)
+{
+	char *ret;
+
+	do {
+		ret = strsep(s, ct);
+	} while (ret && !*ret);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(strsep_no_empty);
+
 #ifndef __HAVE_ARCH_MEMSET
 /**
  * memset - Fill a region of memory with the given value