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-rw-r--r--libconfig/jmccrohan-example.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/libconfig/jmccrohan-example.c b/libconfig/jmccrohan-example.c
new file mode 100644
index 0000000..1dbb6da
--- /dev/null
+++ b/libconfig/jmccrohan-example.c
@@ -0,0 +1,93 @@
+// 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 */