1 /* ----------------------------------------------------------------------------
2 libconfig - A library for processing structured configuration files
3 Copyright (C) 2005-2018 Mark A Lindner
4
5 This file is part of libconfig.
6
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public License
9 as published by the Free Software Foundation; either version 2.1 of
10 the License, or (at your option) any later version.
11
12 This library is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Library General Public
18 License along with this library; if not, see
19 <http://www.gnu.org/licenses/>.
20 ----------------------------------------------------------------------------
21 */
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <libconfig.h>
26
27 /* This example reads the configuration file 'example.cfg' and displays
28 * some of its contents.
29 */
30
main(int argc,char ** argv)31 int main(int argc, char **argv)
32 {
33 config_t cfg;
34 config_setting_t *setting;
35 const char *str;
36
37 config_init(&cfg);
38
39 /* Read the file. If there is an error, report it and exit. */
40 if(! config_read_file(&cfg, "example.cfg"))
41 {
42 fprintf(stderr, "%s:%d - %s\n", config_error_file(&cfg),
43 config_error_line(&cfg), config_error_text(&cfg));
44 config_destroy(&cfg);
45 return(EXIT_FAILURE);
46 }
47
48 /* Get the store name. */
49 if(config_lookup_string(&cfg, "name", &str))
50 printf("Store name: %s\n\n", str);
51 else
52 fprintf(stderr, "No 'name' setting in configuration file.\n");
53
54 /* Output a list of all books in the inventory. */
55 setting = config_lookup(&cfg, "inventory.books");
56 if(setting != NULL)
57 {
58 int count = config_setting_length(setting);
59 int i;
60
61 printf("%-30s %-30s %-6s %s\n", "TITLE", "AUTHOR", "PRICE", "QTY");
62
63 for(i = 0; i < count; ++i)
64 {
65 config_setting_t *book = config_setting_get_elem(setting, i);
66
67 /* Only output the record if all of the expected fields are present. */
68 const char *title, *author;
69 double price;
70 int qty;
71
72 if(!(config_setting_lookup_string(book, "title", &title)
73 && config_setting_lookup_string(book, "author", &author)
74 && config_setting_lookup_float(book, "price", &price)
75 && config_setting_lookup_int(book, "qty", &qty)))
76 continue;
77
78 printf("%-30s %-30s $%6.2f %3d\n", title, author, price, qty);
79 }
80 putchar('\n');
81 }
82
83 /* Output a list of all movies in the inventory. */
84 setting = config_lookup(&cfg, "inventory.movies");
85 if(setting != NULL)
86 {
87 unsigned int count = config_setting_length(setting);
88 unsigned int i;
89
90 printf("%-30s %-10s %-6s %s\n", "TITLE", "MEDIA", "PRICE", "QTY");
91 for(i = 0; i < count; ++i)
92 {
93 config_setting_t *movie = config_setting_get_elem(setting, i);
94
95 /* Only output the record if all of the expected fields are present. */
96 const char *title, *media;
97 double price;
98 int qty;
99
100 if(!(config_setting_lookup_string(movie, "title", &title)
101 && config_setting_lookup_string(movie, "media", &media)
102 && config_setting_lookup_float(movie, "price", &price)
103 && config_setting_lookup_int(movie, "qty", &qty)))
104 continue;
105
106 printf("%-30s %-10s $%6.2f %3d\n", title, media, price, qty);
107 }
108 putchar('\n');
109 }
110
111 config_destroy(&cfg);
112 return(EXIT_SUCCESS);
113 }
114
115 /* eof */
116