summaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
authorOlivier Matz <olivier.matz@6wind.com>2014-01-28 17:06:39 +0100
committerThomas Monjalon <thomas.monjalon@6wind.com>2014-02-04 15:40:46 +0100
commite172d7f9787d7774b525149f8096396b36a4fe8a (patch)
tree1573639a1e9689b5f208c9b889f76bcdc4f8d6a6 /lib
parente9b85f462dcfd70531eb6af0daa8139a806bc3ec (diff)
downloaddpdk-e172d7f9787d7774b525149f8096396b36a4fe8a.zip
dpdk-e172d7f9787d7774b525149f8096396b36a4fe8a.tar.gz
dpdk-e172d7f9787d7774b525149f8096396b36a4fe8a.tar.xz
kvargs: simpler parsing and allow duplicated keys
Remove the rte_kvargs_add_pair() function whose only role was to check if a key is duplicated. Having duplicated keys is now allowed by kvargs API. Also replace rte_strsplit() by more a standard function strtok_r() that is easier to understand for people already knowing the libc. It also avoids useless calls to strnlen(). The delimiters macros become strings instead of chars due to the strtok_r() API. Signed-off-by: Olivier Matz <olivier.matz@6wind.com> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/librte_kvargs/rte_kvargs.c71
-rw-r--r--lib/librte_kvargs/rte_kvargs.h8
2 files changed, 22 insertions, 57 deletions
diff --git a/lib/librte_kvargs/rte_kvargs.c b/lib/librte_kvargs/rte_kvargs.c
index f368956..1291084 100644
--- a/lib/librte_kvargs/rte_kvargs.c
+++ b/lib/librte_kvargs/rte_kvargs.c
@@ -32,8 +32,6 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <string.h>
-#include <sys/user.h>
-#include <linux/binfmts.h>
#include <stdlib.h>
#include <rte_log.h>
@@ -42,38 +40,6 @@
#include "rte_kvargs.h"
/*
- * Add a key-value pair at the end of a given key/value list.
- * Return an error if the list is full or if the key is duplicated.
- */
-static int
-rte_kvargs_add_pair(struct rte_kvargs *kvlist, char *key, char *val)
-{
- unsigned i;
- struct rte_kvargs_pair* entry;
-
- /* is the list full? */
- if (kvlist->count >= RTE_KVARGS_MAX) {
- RTE_LOG(ERR, PMD, "Couldn't add %s, key/value list is full\n", key);
- return -1;
- }
-
- /* Check if the key is duplicated */
- for (i = 0; i < kvlist->count; i++) {
- entry = &kvlist->pairs[i];
- if (strcmp(entry->key, key) == 0) {
- RTE_LOG(ERR, PMD, "Couldn't add %s, duplicated key\n", key);
- return -1;
- }
- }
-
- entry = &kvlist->pairs[kvlist->count];
- entry->key = key;
- entry->value = val;
- kvlist->count++;
- return 0;
-}
-
-/*
* Receive a string with a list of arguments following the pattern
* key=value;key=value;... and insert them into the list.
* strtok() is used so the params string will be copied to be modified.
@@ -81,15 +47,8 @@ rte_kvargs_add_pair(struct rte_kvargs *kvlist, char *key, char *val)
static int
rte_kvargs_tokenize(struct rte_kvargs *kvlist, const char *params)
{
- unsigned i, count;
- char *pairs[RTE_KVARGS_MAX];
- char *pair[2];
-
- /* If params are empty, nothing to do */
- if (params == NULL || params[0] == 0) {
- RTE_LOG(ERR, PMD, "Cannot parse empty arguments\n");
- return -1;
- }
+ unsigned i;
+ char *str, *ctx1, *ctx2;
/* Copy the const char *params to a modifiable string
* to pass to rte_strsplit
@@ -100,27 +59,29 @@ rte_kvargs_tokenize(struct rte_kvargs *kvlist, const char *params)
return -1;
}
- count = rte_strsplit(kvlist->str, strnlen(kvlist->str, MAX_ARG_STRLEN), pairs,
- RTE_KVARGS_MAX, RTE_KVARGS_PAIRS_DELIM);
-
- for (i = 0; i < count; i++) {
- pair[0] = NULL;
- pair[1] = NULL;
+ /* browse each key/value pair and add it in kvlist */
+ str = kvlist->str;
+ while ((str = strtok_r(str, RTE_KVARGS_PAIRS_DELIM, &ctx1)) != NULL) {
- rte_strsplit(pairs[i], strnlen(pairs[i], MAX_ARG_STRLEN), pair, 2,
- RTE_KVARGS_KV_DELIM);
+ i = kvlist->count;
+ if (i >= RTE_KVARGS_MAX) {
+ RTE_LOG(ERR, PMD, "Cannot parse arguments: list full\n");
+ return -1;
+ }
- if (pair[0] == NULL || pair[1] == NULL || pair[0][0] == 0
- || pair[1][0] == 0) {
+ kvlist->pairs[i].key = strtok_r(str, RTE_KVARGS_KV_DELIM, &ctx2);
+ kvlist->pairs[i].value = strtok_r(NULL, RTE_KVARGS_KV_DELIM, &ctx2);
+ if (kvlist->pairs[i].key == NULL || kvlist->pairs[i].value == NULL) {
RTE_LOG(ERR, PMD,
"Cannot parse arguments: wrong key or value\n"
"params=<%s>\n", params);
return -1;
}
- if (rte_kvargs_add_pair(kvlist, pair[0], pair[1]) < 0)
- return -1;
+ kvlist->count++;
+ str = NULL;
}
+
return 0;
}
diff --git a/lib/librte_kvargs/rte_kvargs.h b/lib/librte_kvargs/rte_kvargs.h
index 25e086f..d09dab8 100644
--- a/lib/librte_kvargs/rte_kvargs.h
+++ b/lib/librte_kvargs/rte_kvargs.h
@@ -42,6 +42,10 @@
* This module can be used to parse arguments whose format is
* key1=value1;key2=value2;key3=value3;...
*
+ * The same key can appear several times with the same or a different
+ * value. Indeed, the arguments are stored as a list of key/values
+ * associations and not as a dictionary.
+ *
* This file provides some helpers that are especially used by virtual
* ethernet devices at initialization for arguments parsing.
*/
@@ -54,10 +58,10 @@ extern "C" {
#define RTE_KVARGS_MAX 32
/** separator character used between each pair */
-#define RTE_KVARGS_PAIRS_DELIM ';'
+#define RTE_KVARGS_PAIRS_DELIM ";"
/** separator character used between key and value */
-#define RTE_KVARGS_KV_DELIM '='
+#define RTE_KVARGS_KV_DELIM "="
/** Type of callback function used by rte_kvargs_process() */
typedef int (*arg_handler_t)(char *value, void *opaque);