1 files changed, 97 insertions, 0 deletions
diff --git a/examples/c/example2.c b/examples/c/example2.c
new file mode 100644
index 0000000..2859bd9
--- /dev/null
+++ b/examples/c/example2.c
@@ -0,0 +1,97 @@
+/* ----------------------------------------------------------------------------
+   libconfig - A library for processing structured configuration files
+   Copyright (C) 2005-2018  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/>.
+   ----------------------------------------------------------------------------
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <libconfig.h>
+
+/* This example reads the configuration file 'example.cfg', adds a new
+ * movie record to the movies list, and writes the updated configuration to
+ * 'updated.cfg'.
+ */
+
+int main(int argc, char **argv)
+{
+  static const char *output_file = "updated.cfg";
+  config_t cfg;
+  config_setting_t *root, *setting, *movie;
+
+  config_init(&cfg);
+  config_set_options(&cfg,
+                     (CONFIG_OPTION_FSYNC
+                      | CONFIG_OPTION_SEMICOLON_SEPARATORS
+                      | CONFIG_OPTION_COLON_ASSIGNMENT_FOR_GROUPS
+                      | CONFIG_OPTION_OPEN_BRACE_ON_SEPARATE_LINE));
+
+  /* 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);
+  }
+
+  /* Find the 'movies' setting. Add intermediate settings if they don't yet
+  * exist.
+  */
+  root = config_root_setting(&cfg);
+
+  setting = config_setting_get_member(root, "inventory");
+  if(!setting)
+    setting = config_setting_add(root, "inventory", CONFIG_TYPE_GROUP);
+
+  setting = config_setting_get_member(setting, "movies");
+  if(!setting)
+    setting = config_setting_add(setting, "movies", CONFIG_TYPE_LIST);
+
+  /* Create the new movie entry. */
+  movie = config_setting_add(setting, NULL, CONFIG_TYPE_GROUP);
+
+  setting = config_setting_add(movie, "title", CONFIG_TYPE_STRING);
+  config_setting_set_string(setting, "Buckaroo Banzai");
+
+  setting = config_setting_add(movie, "media", CONFIG_TYPE_STRING);
+  config_setting_set_string(setting, "DVD");
+
+  setting = config_setting_add(movie, "price", CONFIG_TYPE_FLOAT);
+  config_setting_set_float(setting, 12.99);
+
+  setting = config_setting_add(movie, "qty", CONFIG_TYPE_INT);
+  config_setting_set_float(setting, 20);
+
+  /* Write out the updated configuration. */
+  if(! config_write_file(&cfg, output_file))
+  {
+    fprintf(stderr, "Error while writing file.\n");
+    config_destroy(&cfg);
+    return(EXIT_FAILURE);
+  }
+
+  fprintf(stderr, "Updated configuration successfully written to: %s\n",
+          output_file);
+
+  config_destroy(&cfg);
+  return(EXIT_SUCCESS);
+}
+
+/* eof */