vpip/vpi_iter.c

   1 /*
   2  * Copyright (c) 1999 Stephen Williams (steve@icarus.com)
   3  *
   4  *    This source code is free software; you can redistribute it
   5  *    and/or modify it in source code form under the terms of the GNU
   6  *    General Public License as published by the Free Software
   7  *    Foundation; either version 2 of the License, or (at your option)
   8  *    any later version.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *    GNU General Public License for more details.
  14  *
  15  *    You should have received a copy of the GNU General Public License
  16  *    along with this program; if not, write to the Free Software
  17  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  18  */
  19 #ifdef HAVE_CVS_IDENT
  20 #ident "$Id: vpi_iter.c,v 1.2 2002/08/12 01:35:05 steve Exp $"
  21 #endif
  22
  23 /*
  24  * Find here the methods functions in support of iterator objects.
  25  */
  26
  27 # include  "vpi_priv.h"
  28 # include  <stdlib.h>
  29 # include  <assert.h>
  30
  31 static const struct __vpirt vpip_iterator_rt = {
  32       vpiIterator,
  33       0,
  34       0,
  35       0,
  36       0,
  37       0,
  38       0
  39 };
  40
  41 vpiHandle vpip_make_iterator(unsigned nargs, vpiHandle*args)
  42 {
  43       struct __vpiIterator*res = calloc(1, sizeof(struct __vpiIterator));
  44       res->base.vpi_type = &vpip_iterator_rt;
  45       res->args = args;
  46       res->nargs = nargs;
  47       res->next  = 0;
  48
  49       return &(res->base);
  50 }
  51
  52 /*
  53  * The vpi_scan function only applies to iterators. It returns the
  54  * next vpiHandle in the iterated list.
  55  */
  56 vpiHandle vpi_scan(vpiHandle ref)
  57 {
  58       struct __vpiIterator*hp = (struct __vpiIterator*)ref;
  59       assert(ref->vpi_type->type_code == vpiIterator);
  60
  61       if (hp->next == hp->nargs) {
  62             vpi_free_object(ref);
  63             return 0;
  64       }
  65
  66       return hp->args[hp->next++];
  67 }
  68
  69 /*
  70  * $Log: vpi_iter.c,v $
  71  * Revision 1.2  2002/08/12 01:35:05  steve
  72  *  conditional ident string using autoconfig.
  73  *
  74  * Revision 1.1  2001/03/14 19:27:44  steve
  75  *  Rearrange VPI support libraries.
  76  *
  77  * Revision 1.3  2000/02/23 02:56:56  steve
  78  *  Macintosh compilers do not support ident.
  79  *
  80  * Revision 1.2  1999/12/15 04:01:14  steve
  81  *  Add the VPI implementation of $readmemh.
  82  *
  83  * Revision 1.1  1999/10/28 00:47:25  steve
  84  *  Rewrite vvm VPI support to make objects more
  85  *  persistent, rewrite the simulation scheduler
  86  *  in C (to interface with VPI) and add VPI support
  87  *  for callbacks.
  88  *
  89  */
  90