From e3eca8d51a7d6c0676b973713a1ff043eb0095c7 Mon Sep 17 00:00:00 2001
From: Paul LeoNerd Evans <leonerd@leonerd.org.uk>
Date: Mon, 6 Oct 2008 23:36:14 +0100
Subject: [PATCH] Use vtable in driver to indirect calls to the CSI driver

---
 driver-csi.c       | 13 ++++++++++---
 termkey-internal.h |  7 ++++---
 termkey.c          | 14 +++++---------
 3 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/driver-csi.c b/driver-csi.c
index a3e3e7e..a6f5241 100644
--- a/driver-csi.c
+++ b/driver-csi.c
@@ -24,7 +24,7 @@ typedef struct {
   struct keyinfo *csifuncs;
 } termkey_csi;
 
-void *termkeycsi_new_driver(termkey_t *tk)
+static void *new_driver(termkey_t *tk)
 {
   termkey_csi *csi = malloc(sizeof *csi);
 
@@ -50,7 +50,7 @@ void *termkeycsi_new_driver(termkey_t *tk)
   return csi;
 }
 
-void termkeycsi_free_driver(void *private)
+static void free_driver(void *private)
 {
   termkey_csi *csi = private;
 
@@ -324,7 +324,7 @@ static termkey_result getkey_ss3(termkey_t *tk, size_t introlen, termkey_key *ke
   return TERMKEY_RES_KEY;
 }
 
-termkey_result termkeycsi_getkey(termkey_t *tk, termkey_key *key)
+static termkey_result getkey(termkey_t *tk, termkey_key *key)
 {
   if(tk->buffcount == 0)
     return tk->is_closed ? TERMKEY_RES_EOF : TERMKEY_RES_NONE;
@@ -580,3 +580,10 @@ termkey_keysym termkey_register_csifunc_full(termkey_t *tk, termkey_type type, t
 
   return sym;
 }
+
+struct termkey_driver termkey_driver_csi = {
+  .new_driver  = new_driver,
+  .free_driver = free_driver,
+
+  .getkey = getkey,
+};
diff --git a/termkey-internal.h b/termkey-internal.h
index e9fe1fd..7934306 100644
--- a/termkey-internal.h
+++ b/termkey-internal.h
@@ -8,8 +8,9 @@
 
 struct termkey_driver
 {
-  void *(*new_driver)(void);
-  void  (*free_driver)(void *);
+  void          *(*new_driver)(termkey_t *tk);
+  void           (*free_driver)(void *);
+  termkey_result (*getkey)(termkey_t *tk, termkey_key *key);
 };
 
 struct termkey {
@@ -34,6 +35,6 @@ struct termkey {
   void *driver_info;
 };
 
-void *termkeycsi_new_driver(termkey_t *t);
+extern struct termkey_driver termkey_driver_csi;
 
 #endif
diff --git a/termkey.c b/termkey.c
index 393606b..662c6ff 100644
--- a/termkey.c
+++ b/termkey.c
@@ -8,12 +8,6 @@
 
 #include <stdio.h>
 
-// TODO: Move these into t->driver
-void *termkeycsi_new_driver(termkey_t *tk);
-void termkeycsi_free_driver(void *private);
-termkey_result termkeycsi_getkey(termkey_t *tk, termkey_key *key);
-// END TODO
-
 termkey_t *termkey_new_full(int fd, int flags, size_t buffsize, int waittime)
 {
   termkey_t *tk = malloc(sizeof(*tk));
@@ -65,7 +59,9 @@ termkey_t *termkey_new_full(int fd, int flags, size_t buffsize, int waittime)
   for(i = 0; i < tk->nkeynames; i++)
     tk->keynames[i] = NULL;
 
-  tk->driver_info = termkeycsi_new_driver(tk);
+  tk->driver = termkey_driver_csi;
+
+  tk->driver_info = (*tk->driver.new_driver)(tk);
 
   // Special built-in names
   termkey_register_keyname(tk, TERMKEY_SYM_NONE, "NONE");
@@ -168,7 +164,7 @@ void termkey_free(termkey_t *tk)
   free(tk->buffer); tk->buffer = NULL;
   free(tk->keynames); tk->keynames = NULL;
 
-  termkeycsi_free_driver(tk->driver_info);
+  (*tk->driver.free_driver)(tk->driver_info);
   tk->driver_info = NULL; /* Be nice to GC'ers, etc */
 
   free(tk);
@@ -194,7 +190,7 @@ int termkey_getwaittime(termkey_t *tk)
 
 termkey_result termkey_getkey(termkey_t *tk, termkey_key *key)
 {
-  return termkeycsi_getkey(tk, key);
+  return (*tk->driver.getkey)(tk, key);
 }
 
 termkey_result termkey_getkey_force(termkey_t *tk, termkey_key *key)