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// gcc `pkg-config --cflags libconfig` example1.c -o myprogram `pkg-config --libs libconfig`
#include <stdio.h>
#include <stdlib.h>
#include <libconfig.h>
#define CONFIG_FILE jmccrohan-example.cfg
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, "CONFIG_FILE"))
{
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, "version", &str))
printf("Store name: %s\n\n", str);
else
fprintf(stderr, "No 'version' 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 */
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