rx/rx.c

   1 /*      Copyright (C) 1995, 1996 Tom Lord
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU Library General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU Library General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Library General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, 59 Temple Place - Suite 330,
  16  * Boston, MA 02111-1307, USA.
  17  */
  18
  19
  20 \f
  21 #include "rx.h"
  22 #include "rxall.h"
  23 #include "rxhash.h"
  24 #include "rxnfa.h"
  25 #include "rxsuper.h"
  26
  27 \f
  28
  29 const char rx_version_string[] = "GNU Rx version 1.5";
  30
  31 \f
  32 #ifdef __STDC__
  33 struct rx *
  34 rx_make_rx (int cset_size)
  35 #else
  36 struct rx *
  37 rx_make_rx (cset_size)
  38      int cset_size;
  39 #endif
  40 {
  41   static int rx_id = 0;
  42   struct rx * new_rx;
  43   new_rx = (struct rx *)malloc (sizeof (*new_rx));
  44   rx_bzero ((char *)new_rx, sizeof (*new_rx));
  45   new_rx->rx_id = rx_id++;
  46   new_rx->cache = rx_default_cache;
  47   new_rx->local_cset_size = cset_size;
  48   new_rx->instruction_table = rx_id_instruction_table;
  49   new_rx->next_nfa_id = 0;
  50   return new_rx;
  51 }
  52
  53 #ifdef __STDC__
  54 void
  55 rx_free_rx (struct rx * rx)
  56 #else
  57 void
  58 rx_free_rx (rx)
  59      struct rx * rx;
  60 #endif
  61 {
  62   if (rx->start_set)
  63     rx->start_set->starts_for = 0;
  64   rx_free_nfa (rx);
  65   free (rx);
  66 }
  67
  68
  69 #ifdef __STDC__
  70 void
  71 rx_bzero (char * mem, int size)
  72 #else
  73 void
  74 rx_bzero (mem, size)
  75      char * mem;
  76      int size;
  77 #endif
  78 {
  79   while (size)
  80     {
  81       *mem = 0;
  82       ++mem;
  83       --size;
  84     }
  85 }