[dpdk-dev] [PATCH] kvargs: make pointers in string arrays const
Bruce Richardson
bruce.richardson at intel.com
Thu Jan 12 17:18:27 CET 2017
Change the parameters of functions from const char *valid[] to
const char * const valid[]. This additional const is needed to
allow us to fix some checkpatch warnings, as well as being good
programming practice.
For the checkpatch warnings, if we have a set of command line
args that we want to check defined as:
static const char *args[] = { "arg1", "arg2", NULL };
kvlist = rte_kvargs_parse(params, args);
checkpatch will complain:
WARNING:STATIC_CONST_CHAR_ARRAY: static const char *
array should probably be static const char * const
Adding the additional const to the definition of the args
will then trigger a compiler error in the absense of this
change to the kvargs library, as we lose the const in the
call to kvargs_parse.
Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
---
lib/librte_kvargs/rte_kvargs.c | 8 ++++----
lib/librte_kvargs/rte_kvargs.h | 3 ++-
2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/lib/librte_kvargs/rte_kvargs.c b/lib/librte_kvargs/rte_kvargs.c
index 8d56abd..854ac83 100644
--- a/lib/librte_kvargs/rte_kvargs.c
+++ b/lib/librte_kvargs/rte_kvargs.c
@@ -92,9 +92,9 @@ rte_kvargs_tokenize(struct rte_kvargs *kvlist, const char *params)
* into a list of valid keys.
*/
static int
-is_valid_key(const char *valid[], const char *key_match)
+is_valid_key(const char * const valid[], const char *key_match)
{
- const char **valid_ptr;
+ const char * const *valid_ptr;
for (valid_ptr = valid; *valid_ptr != NULL; valid_ptr++) {
if (strcmp(key_match, *valid_ptr) == 0)
@@ -109,7 +109,7 @@ is_valid_key(const char *valid[], const char *key_match)
*/
static int
check_for_valid_keys(struct rte_kvargs *kvlist,
- const char *valid[])
+ const char * const valid[])
{
unsigned i, ret;
struct rte_kvargs_pair *pair;
@@ -187,7 +187,7 @@ rte_kvargs_free(struct rte_kvargs *kvlist)
* check if only valid keys were used.
*/
struct rte_kvargs *
-rte_kvargs_parse(const char *args, const char *valid_keys[])
+rte_kvargs_parse(const char *args, const char * const valid_keys[])
{
struct rte_kvargs *kvlist;
diff --git a/lib/librte_kvargs/rte_kvargs.h b/lib/librte_kvargs/rte_kvargs.h
index ae9ae79..5821c72 100644
--- a/lib/librte_kvargs/rte_kvargs.h
+++ b/lib/librte_kvargs/rte_kvargs.h
@@ -97,7 +97,8 @@ struct rte_kvargs {
* - A pointer to an allocated rte_kvargs structure on success
* - NULL on error
*/
-struct rte_kvargs *rte_kvargs_parse(const char *args, const char *valid_keys[]);
+struct rte_kvargs *rte_kvargs_parse(const char *args,
+ const char *const valid_keys[]);
/**
* Free a rte_kvargs structure
--
2.9.3
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