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38 #include <rte_string_fns.h>
40 #include "rte_kvargs.h"
43 * Receive a string with a list of arguments following the pattern
44 * key=value;key=value;... and insert them into the list.
45 * strtok() is used so the params string will be copied to be modified.
48 rte_kvargs_tokenize(struct rte_kvargs *kvlist, const char *params)
55 /* Copy the const char *params to a modifiable string
56 * to pass to rte_strsplit
58 kvlist->str = strdup(params);
59 if (kvlist->str == NULL) {
60 RTE_LOG(ERR, PMD, "Cannot parse arguments: not enough memory\n");
64 /* browse each key/value pair and add it in kvlist */
66 while ((str = strtok_r(str, RTE_KVARGS_PAIRS_DELIM, &ctx1)) != NULL) {
69 if (i >= RTE_KVARGS_MAX) {
70 RTE_LOG(ERR, PMD, "Cannot parse arguments: list full\n");
74 kvlist->pairs[i].key = strtok_r(str, RTE_KVARGS_KV_DELIM, &ctx2);
75 kvlist->pairs[i].value = strtok_r(NULL, RTE_KVARGS_KV_DELIM, &ctx2);
76 if (kvlist->pairs[i].key == NULL || kvlist->pairs[i].value == NULL) {
78 "Cannot parse arguments: wrong key or value\n"
79 "params=<%s>\n", params);
91 * Determine whether a key is valid or not by looking
92 * into a list of valid keys.
95 is_valid_key(const char * const valid[], const char *key_match)
97 const char * const *valid_ptr;
99 for (valid_ptr = valid; *valid_ptr != NULL; valid_ptr++) {
100 if (strcmp(key_match, *valid_ptr) == 0)
107 * Determine whether all keys are valid or not by looking
108 * into a list of valid keys.
111 check_for_valid_keys(struct rte_kvargs *kvlist,
112 const char * const valid[])
115 struct rte_kvargs_pair *pair;
117 for (i = 0; i < kvlist->count; i++) {
118 pair = &kvlist->pairs[i];
119 ret = is_valid_key(valid, pair->key);
122 "Error parsing device, invalid key <%s>\n",
131 * Return the number of times a given arg_name exists in the key/value list.
132 * E.g. given a list = { rx = 0, rx = 1, tx = 2 } the number of args for
133 * arg "rx" will be 2.
136 rte_kvargs_count(const struct rte_kvargs *kvlist, const char *key_match)
138 const struct rte_kvargs_pair *pair;
142 for (i = 0; i < kvlist->count; i++) {
143 pair = &kvlist->pairs[i];
144 if (key_match == NULL || strcmp(pair->key, key_match) == 0)
152 * For each matching key, call the given handler function.
155 rte_kvargs_process(const struct rte_kvargs *kvlist,
156 const char *key_match,
157 arg_handler_t handler,
160 const struct rte_kvargs_pair *pair;
163 for (i = 0; i < kvlist->count; i++) {
164 pair = &kvlist->pairs[i];
165 if (key_match == NULL || strcmp(pair->key, key_match) == 0) {
166 if ((*handler)(pair->key, pair->value, opaque_arg) < 0)
173 /* free the rte_kvargs structure */
175 rte_kvargs_free(struct rte_kvargs *kvlist)
185 * Parse the arguments "key=value;key=value;..." string and return
186 * an allocated structure that contains a key/value list. Also
187 * check if only valid keys were used.
190 rte_kvargs_parse(const char *args, const char * const valid_keys[])
192 struct rte_kvargs *kvlist;
194 kvlist = malloc(sizeof(*kvlist));
197 memset(kvlist, 0, sizeof(*kvlist));
199 if (rte_kvargs_tokenize(kvlist, args) < 0) {
200 rte_kvargs_free(kvlist);
204 if (valid_keys != NULL && check_for_valid_keys(kvlist, valid_keys) < 0) {
205 rte_kvargs_free(kvlist);