[dpdk-dev] [PATCH v2 1/4] kvargs: support list value

[Thomas Monjalon <thomas@monjalon.net>]

If a value contains a comma, rte_kvargs_tokenize() will split here.
In order to support list syntax [a,b] as value, an extra parsing of
the square brackets is added.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 lib/librte_kvargs/rte_kvargs.c | 14 ++++++++++++++
 test/test/test_kvargs.c        | 21 +++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/lib/librte_kvargs/rte_kvargs.c b/lib/librte_kvargs/rte_kvargs.c
index a28f76945..e616da351 100644
--- a/lib/librte_kvargs/rte_kvargs.c
+++ b/lib/librte_kvargs/rte_kvargs.c
@@ -44,6 +44,20 @@ rte_kvargs_tokenize(struct rte_kvargs *kvlist, const char *params)
 		    kvlist->pairs[i].value == NULL)
 			return -1;
 
+		/* Detect list [a,b] to skip comma delimiter in list. */
+		str = kvlist->pairs[i].value;
+		if (str[0] == '[') {
+			/* Find the end of the list. */
+			while (str[strlen(str) - 1] != ']') {
+				/* Restore the comma erased by strtok_r(). */
+				str[strlen(str)] = ',';
+				/* Parse until next comma. */
+				str = strtok_r(NULL, RTE_KVARGS_PAIRS_DELIM, &ctx1);
+				if (str == NULL)
+					return -1; /* no closing bracket */
+			}
+		}
+
 		kvlist->count++;
 		str = NULL;
 	}
diff --git a/test/test/test_kvargs.c b/test/test/test_kvargs.c
index e6738624e..a42056f36 100644
--- a/test/test/test_kvargs.c
+++ b/test/test/test_kvargs.c
@@ -137,6 +137,26 @@ static int test_valid_kvargs(void)
 	}
 	rte_kvargs_free(kvlist);
 
+	/* third test using list as value */
+	args = "foo=[0,1],check=value2";
+	valid_keys = valid_keys_list;
+	kvlist = rte_kvargs_parse(args, valid_keys);
+	if (kvlist == NULL) {
+		printf("rte_kvargs_parse() error");
+		goto fail;
+	}
+	if (strcmp(kvlist->pairs[0].value, "[0,1]") != 0) {
+		printf("wrong value %s", kvlist->pairs[0].value);
+		goto fail;
+	}
+	count = kvlist->count;
+	if (count != 2) {
+		printf("invalid count value %d\n", count);
+		rte_kvargs_free(kvlist);
+		goto fail;
+	}
+	rte_kvargs_free(kvlist);
+
 	return 0;
 
  fail:
@@ -162,6 +182,7 @@ static int test_invalid_kvargs(void)
 		"foo=1,,foo=2",    /* empty key/value */
 		"foo=1,foo",       /* no value */
 		"foo=1,=2",        /* no key */
+		"foo=[1,2",        /* no closing bracket in value */
 		",=",              /* also test with a smiley */
 		NULL };
 	const char **args;
-- 
2.19.0