lib/librte_eal/common/rte_option.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Intel Corporation.
   3  */
   4
   5 #include <unistd.h>
   6 #include <string.h>
   7
   8 #include <rte_eal.h>
   9 #include <rte_option.h>
  10
  11 #include "eal_private.h"
  12
  13 TAILQ_HEAD(rte_option_list, rte_option);
  14
  15 struct rte_option_list rte_option_list =
  16         TAILQ_HEAD_INITIALIZER(rte_option_list);
  17
  18 int
  19 rte_option_parse(const char *opt)
  20 {
  21         struct rte_option *option;
  22
  23         if (strlen(opt) <= 2 ||
  24             strncmp(opt, "--", 2))
  25                 return -1;
  26
  27         /* Check if the option is registered */
  28         TAILQ_FOREACH(option, &rte_option_list, next) {
  29                 if (strcmp(&opt[2], option->name) == 0) {
  30                         option->enabled = 1;
  31                         return 0;
  32                 }
  33         }
  34
  35         return -1;
  36 }
  37
  38 void __rte_experimental
  39 rte_option_register(struct rte_option *opt)
  40 {
  41         struct rte_option *option;
  42
  43         TAILQ_FOREACH(option, &rte_option_list, next) {
  44                 if (strcmp(opt->name, option->name) == 0) {
  45                         RTE_LOG(INFO, EAL, "Option %s has already been registered.\n",
  46                                         opt->name);
  47                         return;
  48                 }
  49         }
  50
  51         TAILQ_INSERT_HEAD(&rte_option_list, opt, next);
  52 }
  53
  54 void
  55 rte_option_init(void)
  56 {
  57         struct rte_option *option;
  58
  59         TAILQ_FOREACH(option, &rte_option_list, next) {
  60                 if (option->enabled)
  61                         option->cb();
  62         }
  63 }
  64
  65 void
  66 rte_option_usage(void)
  67 {
  68         struct rte_option *option;
  69         int opt_count = 0;
  70
  71         TAILQ_FOREACH(option, &rte_option_list, next)
  72                 opt_count += 1;
  73         if (opt_count == 0)
  74                 return;
  75
  76         printf("EAL dynamic options:\n");
  77         TAILQ_FOREACH(option, &rte_option_list, next)
  78                 printf("  --%-*s %s\n", 17, option->name, option->usage);
  79         printf("\n");
  80 }