Clarify sp_list_ports() code.

This also fixes the following scan-build warning:

  serialport.c:335:15: warning: Result of 'malloc' is converted to a
  pointer of type 'struct sp_port *', which is incompatible with sizeof
  operand type 'struct sp_port **'
          if (!(list = malloc(sizeof(struct sp_port **))))
                       ^~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~

diff --git a/serialport.c b/serialport.c
index f5859e224c75cb1a28b3867a34867f567ca8305f..b8ddffe870e1e1fa4c2269471d78a6cbfb185195 100644 (file)
--- a/serialport.c
+++ b/serialport.c
@@ -330,31 +330,27 @@ SP_API enum sp_return sp_list_ports(struct sp_port ***list_ptr)
        if (!list_ptr)
                RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
 
+#ifdef NO_ENUMERATION
+       RETURN_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
+#else
        DEBUG("Enumerating ports");
 
-       if (!(list = malloc(sizeof(struct sp_port **))))
+       if (!(list = malloc(sizeof(struct sp_port *))))
                RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");
 
        list[0] = NULL;
 
-#ifdef NO_ENUMERATION
-       ret = SP_ERR_SUPP;
-#else
        ret = list_ports(&list);
-#endif
 
-       switch (ret) {
-       case SP_OK:
+       if (ret == SP_OK) {
                *list_ptr = list;
-               RETURN_OK();
-       case SP_ERR_SUPP:
-               DEBUG_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
-       default:
-               if (list)
-                       sp_free_port_list(list);
+       } else {
+               sp_free_port_list(list);
                *list_ptr = NULL;
-               return ret;
        }
+
+       RETURN_CODEVAL(ret);
+#endif
 }
 
 SP_API void sp_free_port_list(struct sp_port **list)