--- /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.
+ */
+#include <string.h>
+#include <stdlib.h>
+
+#include <rte_log.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) {
+ RTE_LOG(ERR, PMD, "Cannot parse arguments: not enough memory\n");
+ 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) {
+ RTE_LOG(ERR, PMD, "Cannot parse arguments: list full\n");
+ 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) {
+ RTE_LOG(ERR, PMD,
+ "Cannot parse arguments: wrong key or value\n"
+ "params=<%s>\n", params);
+ 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 *valid[], const char *key_match)
+{
+ const char **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 *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) {
+ RTE_LOG(ERR, PMD,
+ "Error parsing device, invalid key <%s>\n",
+ pair->key);
+ 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 *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;
+}
Code Review / deb_dpdk.git / blobdiff