[v2,03/12] string: Introduce strends()

Commit Message

Tomeu Vizoso July 1, 2015, 9:40 a.m. UTC

To avoid duplicating code in upcoming patches that will check for
postfixes in strings, add strends().

Signed-off-by: Tomeu Vizoso <[e-mail]>
---

Changes in v2:
- Move strends to string.h

 include/linux/string.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Patch

diff --git a/include/linux/string.h b/include/linux/string.h
index d5dfe3e..4244363 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -146,6 +146,19 @@  static inline bool strstarts(const char *str, const char *prefix)
 	return strncmp(str, prefix, strlen(prefix)) == 0;
 }
 
+/**
+ * strends - does @str end with @postfix?
+ * @str: string to examine
+ * @postfix: postfix to look for
+ */
+static inline bool strends(const char *str, const char *postfix)
+{
+	if (strlen(str) < strlen(postfix))
+		return false;
+
+	return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
+}
+
 size_t memweight(const void *ptr, size_t bytes);
 void memzero_explicit(void *s, size_t count);