src/state.c

   1 /* Type definitions for nondeterministic finite state machine for bison,
   2    Copyright 2001 Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    Bison is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to
  18    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include "system.h"
  23 #include "state.h"
  24
  25 /*---------------------------------.
  26 | Create a new array of N shitfs.  |
  27 `---------------------------------*/
  28
  29 #define SHIFTS_ALLOC(Nshifts)                                           \
  30   (shifts *) xcalloc ((unsigned) (sizeof (shifts)                       \
  31                                   + (Nshifts - 1) * sizeof (short)), 1)
  32
  33 shifts *
  34 shifts_new (int n)
  35 {
  36   shifts *res = SHIFTS_ALLOC (n);
  37   res->nshifts = n;
  38   return res;
  39 }
  40
  41
  42 /*-------------------------------.
  43 | Create a new array of N errs.  |
  44 `-------------------------------*/
  45
  46 #define ERRS_ALLOC(Nerrs)                                               \
  47   (errs *) xcalloc ((unsigned) (sizeof (errs)                           \
  48                                   + (Nerrs - 1) * sizeof (short)), 1)
  49
  50
  51 errs *
  52 errs_new (int n)
  53 {
  54   errs *res = ERRS_ALLOC (n);
  55   res->nerrs = n;
  56   return res;
  57 }
  58
  59
  60 errs *
  61 errs_dup (errs *src)
  62 {
  63   errs *res = errs_new (src->nerrs);
  64   memcpy (res->errs, src->errs, src->nerrs * sizeof (src->errs[0]));
  65   return res;
  66 }
  67
  68 /*-------------------------------------.
  69 | Create a new array of N reductions.  |
  70 `-------------------------------------*/
  71
  72 #define REDUCTIONS_ALLOC(Nreductions)                                   \
  73   (reductions *) xcalloc ((unsigned) (sizeof (reductions)               \
  74                                   + (Nreductions - 1) * sizeof (short)), 1)
  75
  76 reductions *
  77 reductions_new (int n)
  78 {
  79   reductions *res = REDUCTIONS_ALLOC (n);
  80   res->nreds = n;
  81   return res;
  82 }