1 files changed, 205 insertions, 0 deletions
diff --git a/src/spdk/dpdk/lib/librte_kvargs/rte_kvargs.c b/src/spdk/dpdk/lib/librte_kvargs/rte_kvargs.c
new file mode 100644
index 00000000..a28f7694
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_kvargs/rte_kvargs.c
@@ -0,0 +1,205 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2013 Intel Corporation.
+ * Copyright(c) 2014 6WIND S.A.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include <rte_string_fns.h>
+
+#include "rte_kvargs.h"
+
+/*
+ * 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.
+ */
+static int
+rte_kvargs_tokenize(struct rte_kvargs *kvlist, const char *params)
+{
+	unsigned i;
+	char *str;
+	char *ctx1 = NULL;
+	char *ctx2 = NULL;
+
+	/* Copy the const char *params to a modifiable string
+	 * to pass to rte_strsplit
+	 */
+	kvlist->str = strdup(params);
+	if (kvlist->str == NULL)
+		return -1;
+
+	/* browse each key/value pair and add it in kvlist */
+	str = kvlist->str;
+	while ((str = strtok_r(str, RTE_KVARGS_PAIRS_DELIM, &ctx1)) != NULL) {
+
+		i = kvlist->count;
+		if (i >= RTE_KVARGS_MAX)
+			return -1;
+
+		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)
+			return -1;
+
+		kvlist->count++;
+		str = NULL;
+	}
+
+	return 0;
+}
+
+/*
+ * Determine whether a key is valid or not by looking
+ * into a list of valid keys.
+ */
+static int
+is_valid_key(const char * const valid[], const char *key_match)
+{
+	const char * const *valid_ptr;
+
+	for (valid_ptr = valid; *valid_ptr != NULL; valid_ptr++) {
+		if (strcmp(key_match, *valid_ptr) == 0)
+			return 1;
+	}
+	return 0;
+}
+
+/*
+ * Determine whether all keys are valid or not by looking
+ * into a list of valid keys.
+ */
+static int
+check_for_valid_keys(struct rte_kvargs *kvlist,
+		const char * const valid[])
+{
+	unsigned i, ret;
+	struct rte_kvargs_pair *pair;
+
+	for (i = 0; i < kvlist->count; i++) {
+		pair = &kvlist->pairs[i];
+		ret = is_valid_key(valid, pair->key);
+		if (!ret)
+			return -1;
+	}
+	return 0;
+}
+
+/*
+ * Return the number of times a given arg_name exists in the key/value list.
+ * E.g. given a list = { rx = 0, rx = 1, tx = 2 } the number of args for
+ * arg "rx" will be 2.
+ */
+unsigned
+rte_kvargs_count(const struct rte_kvargs *kvlist, const char *key_match)
+{
+	const struct rte_kvargs_pair *pair;
+	unsigned i, ret;
+
+	ret = 0;
+	for (i = 0; i < kvlist->count; i++) {
+		pair = &kvlist->pairs[i];
+		if (key_match == NULL || strcmp(pair->key, key_match) == 0)
+			ret++;
+	}
+
+	return ret;
+}
+
+/*
+ * For each matching key, call the given handler function.
+ */
+int
+rte_kvargs_process(const struct rte_kvargs *kvlist,
+		const char *key_match,
+		arg_handler_t handler,
+		void *opaque_arg)
+{
+	const struct rte_kvargs_pair *pair;
+	unsigned i;
+
+	for (i = 0; i < kvlist->count; i++) {
+		pair = &kvlist->pairs[i];
+		if (key_match == NULL || strcmp(pair->key, key_match) == 0) {
+			if ((*handler)(pair->key, pair->value, opaque_arg) < 0)
+				return -1;
+		}
+	}
+	return 0;
+}
+
+/* free the rte_kvargs structure */
+void
+rte_kvargs_free(struct rte_kvargs *kvlist)
+{
+	if (!kvlist)
+		return;
+
+	free(kvlist->str);
+	free(kvlist);
+}
+
+/*
+ * Parse the arguments "key=value,key=value,..." string and return
+ * an allocated structure that contains a key/value list. Also
+ * check if only valid keys were used.
+ */
+struct rte_kvargs *
+rte_kvargs_parse(const char *args, const char * const valid_keys[])
+{
+	struct rte_kvargs *kvlist;
+
+	kvlist = malloc(sizeof(*kvlist));
+	if (kvlist == NULL)
+		return NULL;
+	memset(kvlist, 0, sizeof(*kvlist));
+
+	if (rte_kvargs_tokenize(kvlist, args) < 0) {
+		rte_kvargs_free(kvlist);
+		return NULL;
+	}
+
+	if (valid_keys != NULL && check_for_valid_keys(kvlist, valid_keys) < 0) {
+		rte_kvargs_free(kvlist);
+		return NULL;
+	}
+
+	return kvlist;
+}
+
+__rte_experimental
+struct rte_kvargs *
+rte_kvargs_parse_delim(const char *args, const char * const valid_keys[],
+		       const char *valid_ends)
+{
+	struct rte_kvargs *kvlist = NULL;
+	char *copy;
+	size_t len;
+
+	if (valid_ends == NULL)
+		return rte_kvargs_parse(args, valid_keys);
+
+	copy = strdup(args);
+	if (copy == NULL)
+		return NULL;
+
+	len = strcspn(copy, valid_ends);
+	copy[len] = '\0';
+
+	kvlist = rte_kvargs_parse(copy, valid_keys);
+
+	free(copy);
+	return kvlist;
+}
+
+__rte_experimental
+int
+rte_kvargs_strcmp(const char *key __rte_unused,
+		  const char *value, void *opaque)
+{
+	const char *str = opaque;
+
+	return -abs(strcmp(str, value));
+}