From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Tejun Heo <tj@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>,
David Airlie <airlied@linux.ie>,
Andrew Morton <akpm@linux-foundation.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1 1/8] lib/string: introduce match_string() helper
Date: Thu, 7 Jan 2016 14:06:01 +0200 [thread overview]
Message-ID: <1452168368-75630-1-git-send-email-andriy.shevchenko@linux.intel.com> (raw)
>From time to time we have to match a string in an array. Make a simple helper
for that purpose.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
include/linux/string.h | 2 ++
lib/string.c | 26 ++++++++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/include/linux/string.h b/include/linux/string.h
index b0a732b..37062fb 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -131,6 +131,8 @@ extern void argv_free(char **argv);
extern bool sysfs_streq(const char *s1, const char *s2);
extern int strtobool(const char *s, bool *res);
+int match_string(const char * const *array, size_t len, const char *string);
+
#ifdef CONFIG_BINARY_PRINTF
int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
diff --git a/lib/string.c b/lib/string.c
index 0323c0d..dd02270 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -631,6 +631,32 @@ bool sysfs_streq(const char *s1, const char *s2)
EXPORT_SYMBOL(sysfs_streq);
/**
+ * match_string - matches given string in an array
+ * @array: array of strings
+ * @len: number of strings in the array or 0 for NULL terminated arrays
+ * @string: string to match with
+ *
+ * Return:
+ * index of a @string in the @array if matches, or %-ENODATA otherwise.
+ */
+int match_string(const char * const *array, size_t len, const char *string)
+{
+ int index = 0;
+ const char *item;
+
+ do {
+ item = array[index];
+ if (!item)
+ break;
+ if (!strcmp(item, string))
+ return index;
+ } while (++index < len || !len);
+
+ return -ENODATA;
+}
+EXPORT_SYMBOL(match_string);
+
+/**
* strtobool - convert common user inputs into boolean values
* @s: input string
* @res: result
--
2.6.4
next reply other threads:[~2016-01-07 12:08 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-07 12:06 Andy Shevchenko [this message]
2016-01-07 12:06 ` [PATCH v1 2/8] device property: convert to use match_string() helper Andy Shevchenko
2016-01-08 13:01 ` Mika Westerberg
2016-01-07 12:06 ` [PATCH v1 3/8] pinctrl: " Andy Shevchenko
2016-01-07 15:19 ` Linus Walleij
2016-01-07 12:06 ` [PATCH v1 4/8] drm/edid: " Andy Shevchenko
2016-01-07 12:06 ` [PATCH v1 5/8] power: charger_manager: " Andy Shevchenko
2016-01-07 12:06 ` [PATCH v1 6/8] power: ab8500: " Andy Shevchenko
2016-01-07 15:19 ` Linus Walleij
2016-01-07 12:06 ` [PATCH v1 7/8] ata: hpt366: " Andy Shevchenko
2016-01-07 15:44 ` Tejun Heo
2016-01-07 12:06 ` [PATCH v1 8/8] ide: " Andy Shevchenko
2016-01-07 13:07 ` [PATCH v1 1/8] lib/string: introduce " Heikki Krogerus
2016-01-07 13:12 ` Andy Shevchenko
2016-01-07 13:24 ` Heikki Krogerus
2016-01-07 22:05 ` Rasmus Villemoes
2016-01-08 8:40 ` Andy Shevchenko
2016-01-08 0:13 ` Sergey Senozhatsky
2016-01-08 8:43 ` Andy Shevchenko
2016-01-09 1:12 ` Sergey Senozhatsky
2016-01-09 11:57 ` Andy Shevchenko
2016-01-11 15:00 ` Andy Shevchenko
2016-01-11 22:10 ` Rasmus Villemoes
2016-01-11 22:24 ` Andy Shevchenko
2016-01-12 8:26 ` Sergey Senozhatsky
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