contrib/dhcp-3.0/includes/statement.h

   1 /* statement.h
   2
   3    Definitions for executable statements... */
   4
   5 /*
   6  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   7  * Copyright (c) 1996-2003 by Internet Software Consortium
   8  *
   9  * Permission to use, copy, modify, and distribute this software for any
  10  * purpose with or without fee is hereby granted, provided that the above
  11  * copyright notice and this permission notice appear in all copies.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  14  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  15  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  16  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  17  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  18  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  19  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20  *
  21  *   Internet Systems Consortium, Inc.
  22  *   950 Charter Street
  23  *   Redwood City, CA 94063
  24  *   <info@isc.org>
  25  *   http://www.isc.org/
  26  *
  27  * This software has been written for Internet Systems Consortium
  28  * by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
  29  * To learn more about Internet Systems Consortium, see
  30  * ``http://www.isc.org/''.  To learn more about Vixie Enterprises,
  31  * see ``http://www.vix.com''.   To learn more about Nominum, Inc., see
  32  * ``http://www.nominum.com''.
  33  */
  34
  35 struct executable_statement {
  36         int refcnt;
  37         struct executable_statement *next;
  38         enum statement_op {
  39                 null_statement,
  40                 if_statement,
  41                 add_statement,
  42                 eval_statement,
  43                 break_statement,
  44                 default_option_statement,
  45                 supersede_option_statement,
  46                 append_option_statement,
  47                 prepend_option_statement,
  48                 send_option_statement,
  49                 statements_statement,
  50                 on_statement,
  51                 switch_statement,
  52                 case_statement,
  53                 default_statement,
  54                 set_statement,
  55                 unset_statement,
  56                 let_statement,
  57                 define_statement,
  58                 log_statement,
  59                 return_statement
  60         } op;
  61         union {
  62                 struct {
  63                         struct executable_statement *tc, *fc;
  64                         struct expression *expr;
  65                 } ie;
  66                 struct expression *eval;
  67                 struct expression *retval;
  68                 struct class *add;
  69                 struct option_cache *option;
  70                 struct option_cache *supersede;
  71                 struct option_cache *prepend;
  72                 struct option_cache *append;
  73                 struct executable_statement *statements;
  74                 struct {
  75                         int evtypes;
  76 #                       define ON_COMMIT  1
  77 #                       define ON_EXPIRY  2
  78 #                       define ON_RELEASE 4
  79 #                       define ON_TRANSMISSION 8
  80                         struct executable_statement *statements;
  81                 } on;
  82                 struct {
  83                         struct expression *expr;
  84                         struct executable_statement *statements;
  85                 } s_switch;
  86                 struct expression *c_case;
  87                 struct {
  88                         char *name;
  89                         struct expression *expr;
  90                         struct executable_statement *statements;
  91                 } set, let;
  92                 char *unset;
  93                 struct {
  94                         enum {
  95                                 log_priority_fatal,
  96                                 log_priority_error,
  97                                 log_priority_debug,
  98                                 log_priority_info
  99                         } priority;
 100                         struct expression *expr;
 101                 } log;
 102         } data;
 103 };
 104