Add comments to functions.

src/config.c

@@ -11,6 +11,13 @@
 
 FILE *file;
 
+/**
+ * Sets the config structure's default values.
+ * 
+ * @param cfg A pointer to the config structure.
+ * 
+ * @return Void
+*/
 void setcfgdefaults(struct config *cfg)
 {
     cfg->updatetime = 0;
@@ -74,6 +81,13 @@ void setcfgdefaults(struct config *cfg)
     }
 }
 
+/**
+ * Opens the config file.
+ * 
+ * @param filename Path to config file.
+ * 
+ * @return 0 on success or 1 on error.
+*/
 int opencfg(const char *filename)
 {
     // Close any existing files.
@@ -94,6 +108,13 @@ int opencfg(const char *filename)
     return 0;
 }
 
+/**
+ * Read the config file and stores values in config structure.
+ * 
+ * @param cfg A pointer to the config structure.
+ * 
+ * @return 0 on success or 1/-1 on error.
+*/
 int readcfg(struct config *cfg)
 {
     // Not sure why this would be set to NULL after checking for it in OpenConfig(), but just for safety.