69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
// -*- mode: C++; c-file-style: "cc-mode" -*-
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//*************************************************************************
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// DESCRIPTION: Verilator: Basic data structure to keep names unique
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//
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// Code available from: https://verilator.org
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//
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//*************************************************************************
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//
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// Copyright 2005-2024 by Wilson Snyder. This program is free software; you
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// can redistribute it and/or modify it under the terms of either the GNU
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// Lesser General Public License Version 3 or the Perl Artistic License
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// Version 2.0.
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// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
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//
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//*************************************************************************
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//
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//*************************************************************************
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#ifndef VERILATOR_V3UNIQUENAMES_H_
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#define VERILATOR_V3UNIQUENAMES_H_
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#include "config_build.h"
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#include "verilatedos.h"
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#include "V3Hasher.h"
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#include <string>
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#include <unordered_map>
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class V3UniqueNames final {
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const std::string m_prefix; // Prefix to attach to all names
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std::unordered_map<std::string, unsigned> m_multiplicity; // Suffix number for given key
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public:
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V3UniqueNames() = default;
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explicit V3UniqueNames(const std::string& prefix)
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: m_prefix{prefix} {
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if (!m_prefix.empty()) {
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UASSERT(VString::startsWith(m_prefix, "__V"), "Prefix must start with '__V'");
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UASSERT(!VString::endsWith(m_prefix, "_"), "Prefix must not end with '_'");
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}
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}
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// Return argument, prepended with the prefix if any, then appended with a unique suffix each
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// time we are called with the same argument.
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std::string get(const std::string& name) {
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const unsigned num = m_multiplicity[name]++;
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std::string result;
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if (!m_prefix.empty()) {
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result += m_prefix;
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result += "_";
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}
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result += name;
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result += "__";
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result += cvtToStr(num);
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return result;
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}
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// Return hash of node as string, prepended with the prefix if any, appended with a unique
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// suffix each time we are called with a node that hashes to the same value.
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std::string get(const AstNode* nodep) { return get(V3Hasher::uncachedHash(nodep).toString()); }
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// Reset to initial state (as if just constructed)
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void reset() { m_multiplicity.clear(); }
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};
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#endif // Guard
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