76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
#ifndef IVL_nex_data_H
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#define IVL_nex_data_H
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/*
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* Copyright (c) 2013-2014 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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# include "ivl_target.h"
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# include <vector>
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# include <cstddef>
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/*
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* The ivl_target.h API allows for binding data to a nexus. This class
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* represents the data that we want to attach to a nexus.
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*/
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class blif_nex_data_t {
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private:
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// The constructors are private. Only the get_nex_data()
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// function can create these objects.
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blif_nex_data_t(ivl_nexus_t nex);
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~blif_nex_data_t();
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public:
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// Return the blif_nex_data_t object that is associated with
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// the given nexus. If the nexus does not have a nex_data_t
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// object, then create it and bind it to the nexus. Thus, this
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// function will always return the same nex_data instance for
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// the same nexus.
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static blif_nex_data_t* get_nex_data(ivl_nexus_t nex);
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// In certain situations, we know a priori what we want the
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// nexus name to be. In those cases, the context can use this
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// method to set the name (by the signal from width the name
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// is derived). Note that this must be called before the name
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// is otherwise queried.
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void set_name(ivl_signal_t sig);
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// Get the symbolic name chosen for this nexus.
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const char*get_name(void);
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// Map a canonical bit index (0 : width-1) to the bit number
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// as understood by the signal. This is normally a null
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// mapping, but sometimes the signal name used for the mapping
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// has a non-canonical bit numbering.
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const char*get_name_index(unsigned bit);
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// Get the vector width for this nexus.
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size_t get_width(void);
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public:
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ivl_nexus_t nex_;
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char*name_;
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std::vector<char*> name_index_;
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private:
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void select_name_(void);
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void make_name_from_sig_(ivl_signal_t sig);
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};
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#endif /* IVL_nex_data_H */
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