troff/request.h

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
   3      Written by James Clark (jjc@jclark.com)
   4
   5 This file is part of groff.
   6
   7 groff is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with groff; see the file COPYING.  If not, write to the Free Software
  19 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 typedef void (*REQUEST_FUNCP)();
  22
  23 class macro;
  24
  25 class request_or_macro : public object {
  26 public:
  27   request_or_macro();
  28   virtual void invoke(symbol s) = 0;
  29   virtual macro *to_macro();
  30 };
  31
  32 class request : public request_or_macro {
  33   REQUEST_FUNCP p;
  34 public:
  35   void invoke(symbol);
  36   request(REQUEST_FUNCP);
  37 };
  38
  39 void delete_request_or_macro(request_or_macro *);
  40
  41 extern object_dictionary request_dictionary;
  42
  43 struct macro_header;
  44 struct node;
  45
  46 class macro : public request_or_macro {
  47   macro_header *p;
  48   const char *filename;         // where was it defined?
  49   int lineno;
  50   int length;
  51 public:
  52   macro();
  53   ~macro();
  54   macro(const macro &);
  55   macro &operator=(const macro &);
  56   void append(unsigned char);
  57   void append(node *);
  58   void invoke(symbol);
  59   macro *to_macro();
  60   void print_size();
  61   int empty();
  62   friend class string_iterator;
  63   friend void chop_macro();
  64   friend int operator==(const macro &, const macro &);
  65 };
  66
  67 extern void init_input_requests();
  68 extern void init_div_requests();
  69 extern void init_node_requests();
  70 extern void init_reg_requests();
  71 extern void init_env_requests();
  72 extern void init_hyphen_requests();
  73 extern void init_request(const char *s, REQUEST_FUNCP f);
  74
  75 extern int no_break_flag;       // indicates whether request was invoked with . or '
  76
  77 class charinfo;
  78 class environment;
  79
  80 node *charinfo_to_node_list(charinfo *, const environment *);