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75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
// -*- mode: C++; c-file-style: "cc-mode" -*-
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//*************************************************************************
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// DESCRIPTION: Verilator: Netlist (top level) functions
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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 2003-2024 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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#define VL_MT_DISABLED_CODE_UNIT 1
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#include "config_build.h"
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#include "verilatedos.h"
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#include "V3ParseImp.h"
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#include <fstream>
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//======================================================================
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// Build in LEX script
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#define yyFlexLexer V3LexerBase
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#include "V3Lexer.yy.cpp"
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#undef yyFlexLexer
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//######################################################################
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// Lex-derived class
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/// Override the base lexer class so we can add some access functions
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class V3Lexer final : public V3LexerBase {
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public:
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// CONSTRUCTORS
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V3Lexer()
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: V3LexerBase{nullptr} {}
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~V3Lexer() override = default;
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// METHODS
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void unputString(const char* textp, size_t length) {
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// Add characters to input stream in back-to-front order
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const char* cp = textp;
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for (cp += length - 1; length--; cp--) unput(*cp);
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}
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};
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void V3ParseImp::lexUnputString(const char* textp, size_t length) {
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parsep()->m_lexerp->unputString(textp, length);
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}
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void V3ParseImp::yylexReadTok() {
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// Call yylex() remembering last non-whitespace token
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parsep()->lexFileline()->startToken();
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const int token = parsep()->m_lexerp->yylex();
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m_lexPrevToken = token; // Save so can find '#' to parse following number
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yylval.token = token;
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}
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//######################################################################
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// Read class functions
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void V3ParseImp::lexNew() {
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if (m_lexerp) delete m_lexerp; // Restart from clean slate.
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m_lexerp = new V3Lexer;
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if (debugFlex() >= 9) m_lexerp->set_debug(~0);
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}
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void V3ParseImp::lexDestroy() {
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if (m_lexerp) VL_DO_CLEAR(delete m_lexerp, m_lexerp = nullptr);
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}
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