Attrib.cc

   1 /*
   2  * Copyright (c) 2000 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: Attrib.cc,v 1.6 2004/02/20 18:53:33 steve Exp $"
  21 #endif
  22
  23 # include "config.h"
  24
  25 # include  "Attrib.h"
  26 # include  <assert.h>
  27
  28 Attrib::Attrib()
  29 {
  30       nlist_ = 0;
  31       list_ = 0;
  32 }
  33
  34 Attrib::~Attrib()
  35 {
  36       delete[] list_;
  37 }
  38
  39
  40 const verinum& Attrib::attribute(perm_string key) const
  41 {
  42       for (unsigned idx = 0 ;  idx < nlist_ ;  idx += 1) {
  43
  44             if (key == list_[idx].key)
  45                   return list_[idx].val;
  46       }
  47
  48       static const verinum null;
  49       return null;
  50 }
  51
  52 void Attrib::attribute(perm_string key, const verinum&value)
  53 {
  54       unsigned idx;
  55
  56       for (idx = 0 ; idx < nlist_ ;  idx += 1) {
  57             if (key == list_[idx].key) {
  58                   list_[idx].val = value;
  59                   return;
  60             }
  61       }
  62
  63       struct cell_*tmp = new struct cell_[nlist_+1];
  64       for (idx = 0 ;  idx < nlist_ ;  idx += 1)
  65             tmp[idx] = list_[idx];
  66
  67       tmp[nlist_].key = key;
  68       tmp[nlist_].val = value;
  69
  70       nlist_ += 1;
  71       delete[]list_;
  72       list_ = tmp;
  73 }
  74
  75 bool Attrib::has_compat_attributes(const Attrib&that) const
  76 {
  77       unsigned idx;
  78
  79       for (idx = 0 ;  idx < that.nlist_ ;  idx += 1) {
  80
  81             verinum tmp = attribute(that.list_[idx].key);
  82             if (tmp != that.list_[idx].val)
  83                   return false;
  84       }
  85
  86       return true;
  87 }
  88
  89 unsigned Attrib::attr_cnt() const
  90 {
  91       return nlist_;
  92 }
  93
  94 perm_string Attrib::attr_key(unsigned idx) const
  95 {
  96       assert(idx < nlist_);
  97       return list_[idx].key;
  98 }
  99
 100 const verinum& Attrib::attr_value(unsigned idx) const
 101 {
 102       assert(idx < nlist_);
 103       return list_[idx].val;
 104 }
 105
 106
 107 /*
 108  * $Log: Attrib.cc,v $
 109  * Revision 1.6  2004/02/20 18:53:33  steve
 110  *  Addtrbute keys are perm_strings.
 111  *
 112  * Revision 1.5  2002/08/12 01:34:58  steve
 113  *  conditional ident string using autoconfig.
 114  *
 115  * Revision 1.4  2002/05/26 01:39:02  steve
 116  *  Carry Verilog 2001 attributes with processes,
 117  *  all the way through to the ivl_target API.
 118  *
 119  *  Divide signal reference counts between rval
 120  *  and lval references.
 121  *
 122  * Revision 1.3  2002/05/23 03:08:50  steve
 123  *  Add language support for Verilog-2001 attribute
 124  *  syntax. Hook this support into existing $attribute
 125  *  handling, and add number and void value types.
 126  *
 127  *  Add to the ivl_target API new functions for access
 128  *  of complex attributes attached to gates.
 129  *
 130  * Revision 1.2  2001/07/25 03:10:48  steve
 131  *  Create a config.h.in file to hold all the config
 132  *  junk, and support gcc 3.0. (Stephan Boettcher)
 133  *
 134  * Revision 1.1  2000/12/04 17:37:03  steve
 135  *  Add Attrib class for holding NetObj attributes.
 136  *
 137  */
 138