94 lines
2.3 KiB
LLVM
94 lines
2.3 KiB
LLVM
%{
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// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2025, Parallax Software, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) 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, see <https://www.gnu.org/licenses/>.
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//
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// The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software.
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//
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// Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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//
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// This notice may not be removed or altered from any source distribution.
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// Liberty function expression lexical analyzer
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#include "util/FlexDisableRegister.hh"
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#include "Debug.hh"
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#include "StringUtil.hh"
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#include "liberty/LibExprReaderPvt.hh"
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#include "liberty/LibExprReader.hh"
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#include "liberty/LibExprScanner.hh"
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using sta::stringCopy;
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using sta::FuncExpr;
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#include "LibExprParse.hh"
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#undef YY_DECL
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#define YY_DECL \
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int \
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sta::LibExprScanner::lex(sta::LibExprParse::semantic_type *const yylval)
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typedef sta::LibExprParse::token token;
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%}
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%option c++
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%option yyclass="sta::LibExprScanner"
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%option prefix="LibExpr"
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%option noyywrap
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%option never-interactive
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%option stack
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/* %option debug */
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%x ESCAPED_STRING
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PORT [A-Za-z_]([A-Za-z0-9_\.\[\]])*
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OP "'"|"!"|"^"|"*"|"&"|"+"|"|"|1|0
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PAREN "("|")"
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BLANK [ \t\r]
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ESCAPE \\
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QUOTE \"
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EOL \r?\n
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%%
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{OP}|{PAREN} { return ((int) yytext[0]); }
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{ESCAPE}{EOL} { /* I doubt that escaped returns get thru the parser */ }
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{ESCAPE}{QUOTE} { BEGIN(ESCAPED_STRING); token_.clear(); }
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<ESCAPED_STRING>. { token_ += yytext[0]; }
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<ESCAPED_STRING>{ESCAPE}{QUOTE} {
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BEGIN(INITIAL);
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yylval->string = stringCopy(token_.c_str());
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return token::PORT;
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}
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{PORT} {
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yylval->string = stringCopy(yytext);
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return token::PORT;
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}
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{BLANK} {}
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/* Send out of bound characters to parser. */
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. { return (int) yytext[0]; }
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%%
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