Pass 'term' string into new_driver virtual method; have drivers sensitive to it and return NULL if they can't handle. Try CSI driver first; only for xterm-alikes

driver-csi.c

@@ -24,8 +24,18 @@ static termkey_keysym register_csi_ss3_full(termkey_csi *csi, termkey_type type,
 static termkey_keysym register_ss3kpalt_full(termkey_csi *csi, termkey_type type, termkey_keysym sym, int modifier_set, int modifier_mask, unsigned char cmd, const char *name, char kpalt);
 static termkey_keysym register_csifunc_full(termkey_csi *csi, termkey_type type, termkey_keysym sym, int modifier_set, int modifier_mask, int number, const char *name);
 
-static void *new_driver(termkey_t *tk)
+static void *new_driver(termkey_t *tk, const char *term)
 {
+  // Only care about term types beginning "xterm"
+  if(strncmp(term, "xterm", 5) != 0)
+    return NULL;
+
+  // We want "xterm" or "xtermc" or "xterm-..."
+  if(term[5] != 0 && term[5] != '-' && term[5] != 'c')
+    return NULL;
+
+  // Excellent - we'll continue
+
   termkey_csi *csi = malloc(sizeof *csi);
 
   csi->tk = tk;

driver-ti.c

@@ -25,9 +25,12 @@ typedef struct {
 static int funcname2keysym(const char *funcname, termkey_type *typep, termkey_keysym *symp, int *modmask, int *modsetp);
 static void register_seq(termkey_ti *ti, const char *seq, termkey_type type, termkey_keysym sym, int modmask, int modset);
 
-static void *new_driver(termkey_t *tk)
+static void *new_driver(termkey_t *tk, const char *term)
 {
-  setupterm((char*)0, 1, (int*)0);
+  int err;
+
+  if(setupterm(term, 1, &err) != OK)
+    return NULL;
 
   termkey_ti *ti = malloc(sizeof *ti);
 

termkey-internal.h

@@ -8,7 +8,7 @@
 
 struct termkey_driver
 {
-  void          *(*new_driver)(termkey_t *tk);
+  void          *(*new_driver)(termkey_t *tk, const char *term);
   void           (*free_driver)(void *);
   termkey_result (*getkey)(termkey_t *tk, termkey_key *key, int force);
 };

termkey.c

@@ -9,8 +9,8 @@
 #include <stdio.h>
 
 static struct termkey_driver *drivers[] = {
-  &termkey_driver_ti,
   &termkey_driver_csi,
+  &termkey_driver_ti,
   NULL,
 };
 
@@ -133,8 +133,10 @@ termkey_t *termkey_new_full(int fd, int flags, size_t buffsize, int waittime)
   register_c0(tk, TERMKEY_SYM_ENTER,     0x0d, NULL);
   register_c0(tk, TERMKEY_SYM_ESCAPE,    0x1b, NULL);
 
+  const char *term = getenv("TERM");
+
   for(i = 0; drivers[i]; i++) {
-    void *driver_info = (*drivers[i]->new_driver)(tk);
+    void *driver_info = (*drivers[i]->new_driver)(tk, term);
     if(!driver_info)
       continue;