[PATCH v4 4/4] mem: add memends_str() helper for symmetry

[Cody P Schafer <dev@codyps.com>]

Signed-off-by: Cody P Schafer <dev@codyps.com>
---
 ccan/mem/mem.h      | 17 +++++++++++++++++
 ccan/mem/test/api.c |  6 +++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/ccan/mem/mem.h b/ccan/mem/mem.h
index 8d6bba9..1afe508 100644
--- a/ccan/mem/mem.h
+++ b/ccan/mem/mem.h
@@ -183,4 +183,21 @@ static inline bool memends(const void *s, size_t s_len, const void *suffix, size
 						suffix, suffix_len) == 0);
 }
 
+/**
+ * memends_str - Does this byte array end with a string suffix?
+ * @a: byte array
+ * @al: length in bytes
+ * @s: string suffix
+ *
+ * Example:
+ *	if (memends_str(somebytes, bytes_len, "It")) {
+ *		printf("somebytes ends with with 'It'\n");
+ *	}
+ */
+PURE_FUNCTION
+static inline bool memends_str(const void *a, size_t al, const char *s)
+{
+	return memends(a, al, s, strlen(s));
+}
+
 #endif /* CCAN_MEM_H */
diff --git a/ccan/mem/test/api.c b/ccan/mem/test/api.c
index 89b6acb..9ec226d 100644
--- a/ccan/mem/test/api.c
+++ b/ccan/mem/test/api.c
@@ -12,7 +12,7 @@ int main(void)
 	char scan2[] = "\0\0\0b";
 
 	/* This is how many tests you plan to run */
-	plan_tests(42);
+	plan_tests(46);
 
 	ok1(memmem(haystack1, sizeof(haystack1), needle1, 2) == haystack1);
 	ok1(memmem(haystack1, sizeof(haystack1), needle1, 3) == NULL);
@@ -71,6 +71,10 @@ int main(void)
 	ok1(!memends(S("a\0bcdef"), S("a\0b")));
 	ok1(memends(S("a\0bcdef"), S("ef")));
 
+	ok1(memends_str(S("abcdef"), "abcdef"));
+	ok1(!memends_str(S("abcde\0f"), "d\0f"));
+	ok1(!memends_str(S("a\0bcdef"), "a"));
+	ok1(memends_str(S("a\0bcdef"), "ef"));
 
 	/* This exits depending on whether all tests passed */
 	return exit_status();
-- 
2.5.1

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