gcc/bi-reverse.c

   1 /* Reverse order of definitions obtained from bytecode definition file.
   2    Copyright (C) 1993 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC 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 GNU CC 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 GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20
  21 #include "hconfig.h"
  22 #include "bi-defs.h"
  23
  24 void
  25 reverse()
  26 {
  27   struct def *dp, *d, *dn;
  28   struct variation *vp, *v, *vn;
  29
  30   dp = defs;
  31   if (dp)
  32     {
  33       vp = dp->variations;
  34       if (vp)
  35         {
  36           for (v = vp->next, vp->next = 0; v; vp = v, v = vn)
  37             {
  38               vn = v->next;
  39               v->next = vp;
  40             }
  41           dp->variations = vp;
  42         }
  43       for (d = dp->next, dp->next = 0; d; dp = d, d = dn)
  44         {
  45           vp = d->variations;
  46           if (vp)
  47             {
  48               for (v = vp->next, vp->next = 0; v; vp = v, v = vn)
  49                 {
  50                   vn = v->next;
  51                   v->next = vp;
  52                 }
  53               d->variations = vp;
  54             }
  55           dn = d->next;
  56           d->next = dp;
  57         }
  58       defs = dp;
  59     }
  60 }