diff -r 576bab0a1c5a -r 4682ebbc5644 src/config.h
--- a/src/config.h	Wed Apr 08 01:28:46 2009 +0300
+++ b/src/config.h	Wed Apr 08 02:25:30 2009 +0300
@@ -15,9 +15,15 @@
 enum config_type {
     CONFIG_INVALID,
 
+    /** No value at all */
+    CONFIG_NULL,
+
     /** A plain NUL-terminated string */
     CONFIG_STRING,
 
+    /** A user-defined type, further identified by a string */
+    CONFIG_USER,
+
     /** An IRC channel */
     CONFIG_IRC_CHAN,
 };
@@ -36,6 +42,15 @@
 
         /** Value for CONFIG_IRC_CHAN */
         struct irc_chan *irc_chan;
+        
+        /** Value for CONFIG_USER */
+        struct {
+            /** The specific user type */
+            const char *type;
+
+            /** A pointer to the user type */
+            void *ptr;
+        } user;
     };
 };
 
@@ -49,6 +64,9 @@
     /** The type */
     enum config_type type;
 
+    /** The specific type for CONFIG_USER */
+    const char *user_type;
+
     /** Description */
     const char *description;
 
@@ -60,6 +78,9 @@
 
     /** Use handler function? */
     bool is_handler;
+
+    /** Optional value? */
+    bool optional;
 };
 
 /**
@@ -83,38 +104,56 @@
     const struct config_param params[CONFIG_PARAMS_MAX];
     
     /** The handler function */
-    err_t (*func) (void *ctx, const struct config_value values[], struct error_info *err);
+    err_t (*func) (void *ctx, const struct config_option *option, const struct config_value values[], struct error_info *err);
 
     /** Help text */
     const char *help;
 };
 
-#define CONFIG_PARAM(name, type, desc) \
-    {   name, type, desc, { NULL }, false }
+#define CONFIG_PARAM(name, type, desc, optional) \
+    {   name, type, NULL, desc, { NULL }, false, optional }
+
+#define CONFIG_PARAM_OPTIONAL(name, type, desc) \
+    CONFIG_PARAM(name, type, desc, true)
+
+#define CONFIG_PARAM_USER(name, user_type, desc, optional) \
+    {   name, CONFIG_USER, user_type, desc, { NULL }, false, optional }
+
+#define CONFIG_PARAM_USER_OPTIONAL(name, user_type, desc) \
+    CONFIG_PARAM_USER(name, user_type, desc, true) 
 
 #define CONFIG_PARAM_HANDLER(name, type, desc, _func_name_, func) \
-    {   name, type, desc, {._func_name_ = func }, true }
+    {   name, type, NULL, desc, {._func_name_ = func }, true, false }
 
-#define CONFIG_OPT(name, params, func, help) \
-    {   name, params, func, help }
+#define CONFIG_PARAM_END \
+    {   NULL, 0, NULL, NULL, { NULL }, false, false }
+
+#define CONFIG_OPT(name, func, help, ...) \
+    {   name, { __VA_ARGS__, CONFIG_PARAM_END }, func, help }
 
 #define CONFIG_OPT_STRING(name, func, desc, help) \
-    {   name, { CONFIG_PARAM_HANDLER(name, CONFIG_STRING, desc, string, func) }, NULL, help }
+    CONFIG_OPT(name, NULL, help, CONFIG_PARAM_HANDLER(name, CONFIG_STRING, desc, string, func))
 
 #define CONFIG_OPT_IRC_CHAN(name, func, desc, help) \
-    {   name, { CONFIG_PARAM_HANDLER(name, CONFIG_IRC_CHAN, desc, irc_chan, func) }, NULL, help }
+    CONFIG_OPT(name, NULL, help, CONFIG_PARAM_HANDLER(name, CONFIG_IRC_CHAN, desc, irc_chan, func))
 
 #define CONFIG_OPT_END \
     {   NULL,   {}, NULL, NULL }
 
+#define CONFIG_OPTIONS(...) \
+    { __VA_ARGS__, CONFIG_OPT_END }
+
 #define CONFIG_VALUE(type, _name_, value) \
-    {   (type), { ._name_ = (value) } }
+    {   (type), { ._name_ = value } }
 
 #define CONFIG_VALUE_STRING(str_value) \
-    CONFIG_VALUE(CONFIG_STRING, string, str_value)
+    CONFIG_VALUE(CONFIG_STRING, string, (str_value))
 
 #define CONFIG_VALUE_IRC_CHAN(irc_chan_value) \
-    CONFIG_VALUE(CONFIG_IRC_CHAN, irc_chan, irc_chan_value)
+    CONFIG_VALUE(CONFIG_IRC_CHAN, irc_chan, (irc_chan_value))
+
+#define CONFIG_VALUE_USER(user_type, user_value) \
+    CONFIG_VALUE(CONFIG_USER, user, { user_type, user_value })
 
 #define CONFIG_VALUE_END \
     {   0, { NULL } }
@@ -206,6 +245,15 @@
  *
  * @see config_parse
  */
-err_t config_apply_raw (const struct config_option *options, struct nexus *nexus, void *ctx, const char *name, char *raw_value, struct error_info *err);
+err_t config_apply_raw (const struct config_option option[], struct nexus *nexus, void *ctx, const char *name, char *raw_value, struct error_info *err);
+
+/**
+ * Lookup a config_value by name from the given list of config_values for the given config_option
+ */
+const struct config_value* config_get_value (const struct config_option *option, const struct config_value values[], const char *name);
+
+const char* config_get_string (const struct config_option *option, const struct config_value values[], const char *name);
+struct irc_chan* config_get_irc_chan (const struct config_option *option, const struct config_value values[], const char *name);
+void* config_get_user (const struct config_option *option, const struct config_value values[], const char *name, const char *user_type);
 
 #endif