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Message-ID: <20240122074015.4042575-2-yebin10@huawei.com>
Date: Mon, 22 Jan 2024 15:40:09 +0800
From: Ye Bin <yebin10@...wei.com>
To: <rostedt@...dmis.org>, <mhiramat@...nel.org>,
<mathieu.desnoyers@...icios.com>, <linux-trace-kernel@...r.kernel.org>
CC: <linux-kernel@...r.kernel.org>, <yebin10@...wei.com>
Subject: [PATCH v2 1/7] string.h: add str_has_suffix() helper for test string ends with specify string
str_has_suffix() is test string if ends with specify string.
Signed-off-by: Ye Bin <yebin10@...wei.com>
---
include/linux/string.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/include/linux/string.h b/include/linux/string.h
index 433c207a01da..e47e9597af27 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -405,4 +405,24 @@ static __always_inline size_t str_has_prefix(const char *str, const char *prefix
return strncmp(str, prefix, len) == 0 ? len : 0;
}
+/**
+ * str_has_suffix - Test if a string has a given suffix
+ * @str: The string to test
+ * @suffix: The string to see if @str ends with
+ *
+ * Returns:
+ * * strlen(@suffix) if @str ends with @suffix
+ * * 0 if @str does not end with @suffix
+ */
+static __always_inline size_t str_has_suffix(const char *str, const char *suffix)
+{
+ size_t len = strlen(suffix);
+ size_t str_len = strlen(str);
+
+ if (len > str_len)
+ return 0;
+
+ return strncmp(str + str_len - len, suffix, len) == 0 ? len : 0;
+}
+
#endif /* _LINUX_STRING_H_ */
--
2.31.1
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