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// OpenSTA, Static Timing Analyzer
// Copyright (c) 2025, Parallax Software, Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//
// The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software.
//
// Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// This notice may not be removed or altered from any source distribution.
// Liberty function expression lexical analyzer
#include <string>
#include "util/FlexDisableRegister.hh"
#include "Debug.hh"
#include "liberty/LibExprReaderPvt.hh"
#include "liberty/LibExprReader.hh"
#include "liberty/LibExprScanner.hh"
using sta::FuncExpr;
#include "LibExprParse.hh"
#undef YY_DECL
#define YY_DECL \
int \
sta::LibExprScanner::lex(sta::LibExprParse::semantic_type *yylval)
typedef sta::LibExprParse::token token;
%}
%option c++
%option yyclass="sta::LibExprScanner"
%option prefix="LibExpr"
%option noyywrap
%option never-interactive
%option stack
/* %option debug */
%x ESCAPED_STRING
PORT [A-Za-z_]([A-Za-z0-9_\.\[\]])*
OP "'"|"!"|"^"|"*"|"&"|"+"|"|"|1|0
PAREN "("|")"
BLANK [ \t\r]
ESCAPE \\
QUOTE \"
EOL \r?\n
%%
{OP}|{PAREN} { return ((int) yytext[0]); }
{ESCAPE}{EOL} { /* I doubt that escaped returns get thru the parser */ }
{ESCAPE}{QUOTE} { BEGIN(ESCAPED_STRING); token_.clear(); }
<ESCAPED_STRING>. { token_ += yytext[0]; }
<ESCAPED_STRING>{ESCAPE}{QUOTE} {
BEGIN(INITIAL);
yylval->emplace<std::string>(token_);
return token::PORT;
}
{PORT} {
yylval->emplace<std::string>(yytext, yyleng);
return token::PORT;
}
{BLANK} {}
/* Send out of bound characters to parser. */
. { return (int) yytext[0]; }
%%
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