includes/statement.h

   1 /* statement.h
   2
   3    Definitions for executable statements... */
   4
   5 /*
   6  * Copyright (c) 1996-1999 Internet Software Consortium.
   7  * Use is subject to license terms which appear in the file named
   8  * ISC-LICENSE that should have accompanied this file when you
   9  * received it.   If a file named ISC-LICENSE did not accompany this
  10  * file, or you are not sure the one you have is correct, you may
  11  * obtain an applicable copy of the license at:
  12  *
  13  *             http://www.isc.org/isc-license-1.0.html.
  14  *
  15  * This file is part of the ISC DHCP distribution.   The documentation
  16  * associated with this file is listed in the file DOCUMENTATION,
  17  * included in the top-level directory of this release.
  18  *
  19  * Support and other services are available for ISC products - see
  20  * http://www.isc.org for more information.
  21  */
  22
  23 struct executable_statement {
  24         int refcnt;
  25         struct executable_statement *next;
  26         enum statement_op {
  27                 if_statement,
  28                 add_statement,
  29                 eval_statement,
  30                 break_statement,
  31                 default_option_statement,
  32                 supersede_option_statement,
  33                 append_option_statement,
  34                 prepend_option_statement,
  35                 send_option_statement,
  36                 statements_statement,
  37                 on_statement
  38         } op;
  39         union {
  40                 struct {
  41                         struct executable_statement *true, *false;
  42                         struct expression *expr;
  43                 } ie;
  44                 struct expression *eval;
  45                 struct class *add;
  46                 struct option_cache *option;
  47                 struct option_cache *supersede;
  48                 struct option_cache *prepend;
  49                 struct option_cache *append;
  50                 struct executable_statement *statements;
  51                 struct {
  52                         enum { expiry, commit, release } evtype;
  53                         struct executable_statement *statements;
  54                 } on;
  55         } data;
  56 };
  57