--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
+ * Copyright(c) 2014 6WIND S.A.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_KVARGS_H_
+#define _RTE_KVARGS_H_
+
+/**
+ * @file
+ * RTE Argument parsing
+ *
+ * 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.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Maximum number of key/value associations */
+#define RTE_KVARGS_MAX 32
+
+/** separator character used between each pair */
+#define RTE_KVARGS_PAIRS_DELIM ","
+
+/** separator character used between key and value */
+#define RTE_KVARGS_KV_DELIM "="
+
+/** Type of callback function used by rte_kvargs_process() */
+typedef int (*arg_handler_t)(const char *key, const char *value, void *opaque);
+
+/** A key/value association */
+struct rte_kvargs_pair {
+ char *key; /**< the name (key) of the association */
+ char *value; /**< the value associated to that key */
+};
+
+/** Store a list of key/value associations */
+struct rte_kvargs {
+ char *str; /**< copy of the argument string */
+ unsigned count; /**< number of entries in the list */
+ struct rte_kvargs_pair pairs[RTE_KVARGS_MAX]; /**< list of key/values */
+};
+
+/**
+ * Allocate a rte_kvargs and store key/value associations from a string
+ *
+ * The function allocates and fills a rte_kvargs structure from a given
+ * string whose format is key1=value1,key2=value2,...
+ *
+ * The structure can be freed with rte_kvargs_free().
+ *
+ * @param args
+ * The input string containing the key/value associations
+ * @param valid_keys
+ * A list of valid keys (table of const char *, the last must be NULL).
+ * This argument is ignored if NULL
+ *
+ * @return
+ * - 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[]);
+
+/**
+ * Free a rte_kvargs structure
+ *
+ * Free a rte_kvargs structure previously allocated with
+ * rte_kvargs_parse().
+ *
+ * @param kvlist
+ * The rte_kvargs structure
+ */
+void rte_kvargs_free(struct rte_kvargs *kvlist);
+
+/**
+ * Call a handler function for each key/value matching the key
+ *
+ * For each key/value association that matches the given key, calls the
+ * handler function with the for a given arg_name passing the value on the
+ * dictionary for that key and a given extra argument. If *kvlist* is NULL
+ * function does nothing.
+ *
+ * @param kvlist
+ * The rte_kvargs structure
+ * @param key_match
+ * The key on which the handler should be called, or NULL to process handler
+ * on all associations
+ * @param handler
+ * The function to call for each matching key
+ * @param opaque_arg
+ * A pointer passed unchanged to the handler
+ *
+ * @return
+ * - 0 on success
+ * - Negative on error
+ */
+int rte_kvargs_process(const struct rte_kvargs *kvlist,
+ const char *key_match, arg_handler_t handler, void *opaque_arg);
+
+/**
+ * Count the number of associations matching the given key
+ *
+ * @param kvlist
+ * The rte_kvargs structure
+ * @param key_match
+ * The key that should match, or NULL to count all associations
+
+ * @return
+ * The number of entries
+ */
+unsigned rte_kvargs_count(const struct rte_kvargs *kvlist,
+ const char *key_match);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
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