89 lines
3.3 KiB
Plaintext
89 lines
3.3 KiB
Plaintext
%{
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: arith_lex.l,v 1.2 1994/09/24 02:57:22 davidg Exp $
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*/
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#ifndef lint
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static char sccsid[] = "@(#)arith_lex.l 8.1 (Berkeley) 5/31/93";
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#endif /* not lint */
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#include "y.tab.h"
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extern yylval;
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extern char *arith_buf, *arith_startbuf;
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int arith_wasoper;
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#undef YY_INPUT
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#define YY_INPUT(buf,result,max) \
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result = (*buf = *arith_buf++) ? 1 : YY_NULL;
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%}
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%%
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[ \t\n] { ; }
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[0-9]+ { arith_wasoper = 0; yylval = atol(yytext); return(ARITH_NUM); }
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"(" { arith_wasoper = 1; return(ARITH_LPAREN); }
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")" { arith_wasoper = 0; return(ARITH_RPAREN); }
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"||" { arith_wasoper = 1; return(ARITH_OR); }
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"&&" { arith_wasoper = 1; return(ARITH_AND); }
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"==" { arith_wasoper = 1; return(ARITH_EQ); }
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">" { arith_wasoper = 1; return(ARITH_GT); }
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">=" { arith_wasoper = 1; return(ARITH_GEQ); }
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"<" { arith_wasoper = 1; return(ARITH_LT); }
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"<=" { arith_wasoper = 1; return(ARITH_LEQ); }
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"!=" { arith_wasoper = 1; return(ARITH_NEQ); }
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"*" { arith_wasoper = 1; return(ARITH_MULT); }
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"/" { arith_wasoper = 1; return(ARITH_DIV); }
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"%" { arith_wasoper = 1; return(ARITH_REM); }
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"+" { if (!arith_wasoper) { /* ignore unary plus */
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arith_wasoper = 1;
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return(ARITH_ADD);
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}
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}
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"-" { if (arith_wasoper) {
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return(ARITH_UNARYMINUS);
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} else {
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arith_wasoper = 1;
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return(ARITH_SUBT);
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}
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}
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"!" { arith_wasoper = 1; return(ARITH_NOT); }
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. { error("arith: syntax error: \"%s\"\n", arith_startbuf); }
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%%
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arith_lex_reset() {
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YY_NEW_FILE;
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}
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