Module.cc

   1 /*
   2  * Copyright (c) 1998-2008 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
  20 # include "config.h"
  21
  22 # include  "Module.h"
  23 # include  "PGate.h"
  24 # include  "PWire.h"
  25 # include  <assert.h>
  26
  27 /* n is a permallocated string. */
  28 Module::Module(perm_string n)
  29 : PScope(n, 0)
  30 {
  31       library_flag = false;
  32       default_nettype = NetNet::NONE;
  33 }
  34
  35 Module::~Module()
  36 {
  37 }
  38
  39 void Module::add_gate(PGate*gate)
  40 {
  41       gates_.push_back(gate);
  42 }
  43
  44 void Module::add_task(perm_string name, PTask*task)
  45 {
  46       tasks_[name] = task;
  47 }
  48
  49 void Module::add_function(perm_string name, PFunction *func)
  50 {
  51       funcs_[name] = func;
  52 }
  53
  54 unsigned Module::port_count() const
  55 {
  56       return ports.count();
  57 }
  58
  59 /*
  60  * Return the array of PEIdent object that are at this port of the
  61  * module. If the port is internally unconnected, return an empty
  62  * array.
  63  */
  64 const svector<PEIdent*>& Module::get_port(unsigned idx) const
  65 {
  66       assert(idx < ports.count());
  67       static svector<PEIdent*> zero;
  68
  69       if (ports[idx])
  70             return ports[idx]->expr;
  71       else
  72             return zero;
  73 }
  74
  75 unsigned Module::find_port(const char*name) const
  76 {
  77       assert(name != 0);
  78       for (unsigned idx = 0 ;  idx < ports.count() ;  idx += 1) {
  79             if (ports[idx] == 0) {
  80                     /* It is possible to have undeclared ports. These
  81                        are ports that are skipped in the declaration,
  82                        for example like so: module foo(x ,, y); The
  83                        port between x and y is unnamed and thus
  84                        inaccessible to binding by name. */
  85                   continue;
  86             }
  87             assert(ports[idx]);
  88             if (ports[idx]->name == name)
  89                   return idx;
  90       }
  91
  92       return ports.count();
  93 }
  94
  95
  96 PGate* Module::get_gate(perm_string name)
  97 {
  98       for (list<PGate*>::iterator cur = gates_.begin()
  99                  ; cur != gates_.end()
 100                  ; cur ++ ) {
 101
 102             if ((*cur)->get_name() == name)
 103                   return *cur;
 104       }
 105
 106       return 0;
 107 }
 108
 109 const list<PGate*>& Module::get_gates() const
 110 {
 111       return gates_;
 112 }
 113