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+/* ----------------------------------------------------------------------------
+ libconfig - A library for processing structured configuration files
+ Copyright (C) 2005-2010 Mark A Lindner
+
+ This file is part of libconfig.
+
+ This 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.
+
+ This 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 Library General Public
+ License along with this library; if not, see
+ <http://www.gnu.org/licenses/>.
+ ----------------------------------------------------------------------------
+*/
+
+// gcc `pkg-config --cflags libconfig` example1.c -o myprogram `pkg-config --libs libconfig`
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <libconfig.h>
+
+/* This example reads the configuration file 'example.cfg' and displays
+ * some of its contents.
+ */
+
+int main(int argc, char **argv)
+{
+ config_t cfg;
+ config_setting_t *setting;
+ const char *str;
+
+ config_init(&cfg);
+
+ /* Read the file. If there is an error, report it and exit. */
+ if(! config_read_file(&cfg, "example.cfg"))
+ {
+ fprintf(stderr, "%s:%d - %s\n", config_error_file(&cfg),
+ config_error_line(&cfg), config_error_text(&cfg));
+ config_destroy(&cfg);
+ return(EXIT_FAILURE);
+ }
+
+ /* Get the store name. */
+ if(config_lookup_string(&cfg, "name", &str))
+ printf("Store name: %s\n\n", str);
+ else
+ fprintf(stderr, "No 'name' setting in configuration file.\n");
+
+ /* Output a list of all books in the inventory. */
+ setting = config_lookup(&cfg, "inventory.books");
+ if(setting != NULL)
+ {
+ int count = config_setting_length(setting);
+ int i;
+
+ printf("%-30s %-30s %-6s %s\n", "TITLE", "AUTHOR", "PRICE", "QTY");
+
+ for(i = 0; i < count; ++i)
+ {
+ config_setting_t *book = config_setting_get_elem(setting, i);
+
+ /* Only output the record if all of the expected fields are present. */
+ const char *title, *author;
+ double price;
+ int qty;
+
+ if(!(config_setting_lookup_string(book, "title", &title)
+ && config_setting_lookup_string(book, "author", &author)
+ && config_setting_lookup_float(book, "price", &price)
+ && config_setting_lookup_int(book, "qty", &qty)))
+ continue;
+
+ printf("%-30s %-30s $%6.2f %3d\n", title, author, price, qty);
+ }
+ putchar('\n');
+ }
+
+ /* Output a list of all movies in the inventory. */
+ setting = config_lookup(&cfg, "inventory.movies");
+ if(setting != NULL)
+ {
+ unsigned int count = config_setting_length(setting);
+ unsigned int i;
+
+ printf("%-30s %-10s %-6s %s\n", "TITLE", "MEDIA", "PRICE", "QTY");
+ for(i = 0; i < count; ++i)
+ {
+ config_setting_t *movie = config_setting_get_elem(setting, i);
+
+ /* Only output the record if all of the expected fields are present. */
+ const char *title, *media;
+ double price;
+ int qty;
+
+ if(!(config_setting_lookup_string(movie, "title", &title)
+ && config_setting_lookup_string(movie, "media", &media)
+ && config_setting_lookup_float(movie, "price", &price)
+ && config_setting_lookup_int(movie, "qty", &qty)))
+ continue;
+
+ printf("%-30s %-10s $%6.2f %3d\n", title, media, price, qty);
+ }
+ putchar('\n');
+ }
+
+ config_destroy(&cfg);
+ return(EXIT_SUCCESS);
+}
+
+/* eof */