example_strmap.c

Simple example showing the sg_strmap feature.

/*                         _
 *   ___  __ _  __ _ _   _(_)
 *  / __|/ _` |/ _` | | | | |
 *  \__ \ (_| | (_| | |_| | |
 *  |___/\__,_|\__, |\__,_|_|
 *             |___/
 *
 * Cross-platform library which helps to develop web servers or frameworks.
 *
 * Copyright (C) 2016-2019 Silvio Clecio <silvioprog@gmail.com>
 *
 * Sagui library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * Sagui library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Sagui library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
 
/* NOTE: Error checking has been omitted to make it clear. */
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sagui.h>
 
static int map_sort(__SG_UNUSED void *cls, struct sg_strmap *pair_a,
                    struct sg_strmap *pair_b) {
  return strcmp(sg_strmap_val(pair_b), sg_strmap_val(pair_a)); /* desc */
}
 
static int map_iter(__SG_UNUSED void *cls, struct sg_strmap *pair) {
  const char *name = sg_strmap_name(pair);
  printf("\t%c: %s\n", *name, name);
  return 0;
}
 
static void chat(struct sg_strmap **map, const char *name, const char *msg) {
  struct sg_strmap *pair;
  sg_strmap_set(map, name, msg);
  if (msg && (sg_strmap_find(*map, name, &pair) == 0))
    printf("%c:\t%s\n", *sg_strmap_name(pair), sg_strmap_val(pair));
}
 
int main(void) {
  struct sg_strmap *map = NULL;
  chat(&map, "Clecio", "Hello!");
  chat(&map, "Paim", "Hello. How are you?");
  chat(&map, "Clecio", "I'm fine. And you?");
  chat(&map, "Paim", "Me too.");
  printf("\nChatters:\n");
  sg_strmap_sort(&map, &map_sort, NULL);
  sg_strmap_iter(map, &map_iter, NULL);
  sg_strmap_cleanup(&map);
  return EXIT_SUCCESS;
}