netdev - [PATCH iproute2-next v3 4/5] utils: Add helper to map string to unsigned int

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Date:   Tue, 2 Feb 2021 12:35:17 +0200
From:   Parav Pandit <parav@...dia.com>
To:     <virtualization@...ts.linux-foundation.org>,
        <netdev@...r.kernel.org>, <dsahern@...il.com>,
        <stephen@...workplumber.org>, <mst@...hat.com>,
        <jasowang@...hat.com>
CC:     Parav Pandit <parav@...dia.com>
Subject: [PATCH iproute2-next v3 4/5] utils: Add helper to map string to unsigned int

In subsequent patch need to map a string to a unsigned int.
Hence, add an API to map a string to unsigned int.

Signed-off-by: Parav Pandit <parav@...dia.com>
---
changelog:
v2->v3:
 - new patch to reuse string to unsigned int mapping
---
 include/utils.h |  4 +++-
 lib/utils.c     | 17 +++++++++++++++--
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/include/utils.h b/include/utils.h
index 9b76c92a..b29c3798 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -342,10 +342,12 @@ int parse_mapping(int *argcp, char ***argvp, bool allow_all,
 
 struct str_num_map {
 	const char *str;
-	int num;
+	unsigned int num;
 };
 
 int str_map_lookup_str(const struct str_num_map *map, const char *needle);
+const char *str_map_lookup_uint(const struct str_num_map *map,
+				unsigned int val);
 const char *str_map_lookup_u16(const struct str_num_map *map, uint16_t val);
 const char *str_map_lookup_u8(const struct str_num_map *map, uint8_t val);
 
diff --git a/lib/utils.c b/lib/utils.c
index cc6d0e34..633f6359 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -1953,9 +1953,22 @@ int str_map_lookup_str(const struct str_num_map *map, const char *needle)
 	return -EINVAL;
 }
 
+const char *str_map_lookup_uint(const struct str_num_map *map, unsigned int val)
+{
+	unsigned int num = val;
+
+	while (map && map->str) {
+		if (num == map->num)
+			return map->str;
+
+		map++;
+	}
+	return NULL;
+}
+
 const char *str_map_lookup_u16(const struct str_num_map *map, uint16_t val)
 {
-	int num = val;
+	unsigned int num = val;
 
 	while (map && map->str) {
 		if (num == map->num)
@@ -1968,7 +1981,7 @@ const char *str_map_lookup_u16(const struct str_num_map *map, uint16_t val)
 
 const char *str_map_lookup_u8(const struct str_num_map *map, uint8_t val)
 {
-	int num = val;
+	unsigned int num = val;
 
 	while (map && map->str) {
 		if (num == map->num)
-- 
2.26.2