88 lines
3.3 KiB
Plaintext
88 lines
3.3 KiB
Plaintext
%{
|
|
/*-
|
|
* Copyright (c) 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Kenneth Almquist.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
/*static char sccsid[] = "from: @(#)arith_lex.l 8.1 (Berkeley) 5/31/93";*/
|
|
static char *rcsid = "$Id: arith_lex.l,v 1.2 1994/06/11 16:11:42 mycroft Exp $";
|
|
#endif /* not lint */
|
|
|
|
#include "y.tab.h"
|
|
|
|
extern yylval;
|
|
extern char *arith_buf, *arith_startbuf;
|
|
int arith_wasoper;
|
|
#undef YY_INPUT
|
|
#define YY_INPUT(buf,result,max) \
|
|
result = (*buf = *arith_buf++) ? 1 : YY_NULL;
|
|
%}
|
|
|
|
%%
|
|
[ \t\n] { ; }
|
|
[0-9]+ { arith_wasoper = 0; yylval = atol(yytext); return(ARITH_NUM); }
|
|
"(" { arith_wasoper = 1; return(ARITH_LPAREN); }
|
|
")" { arith_wasoper = 0; return(ARITH_RPAREN); }
|
|
"||" { arith_wasoper = 1; return(ARITH_OR); }
|
|
"&&" { arith_wasoper = 1; return(ARITH_AND); }
|
|
"==" { arith_wasoper = 1; return(ARITH_EQ); }
|
|
">" { arith_wasoper = 1; return(ARITH_GT); }
|
|
">=" { arith_wasoper = 1; return(ARITH_GEQ); }
|
|
"<" { arith_wasoper = 1; return(ARITH_LT); }
|
|
"<=" { arith_wasoper = 1; return(ARITH_LEQ); }
|
|
"!=" { arith_wasoper = 1; return(ARITH_NEQ); }
|
|
"*" { arith_wasoper = 1; return(ARITH_MULT); }
|
|
"/" { arith_wasoper = 1; return(ARITH_DIV); }
|
|
"%" { arith_wasoper = 1; return(ARITH_REM); }
|
|
"+" { if (!arith_wasoper) { /* ignore unary plus */
|
|
arith_wasoper = 1;
|
|
return(ARITH_ADD);
|
|
}
|
|
}
|
|
"-" { if (arith_wasoper) {
|
|
return(ARITH_UNARYMINUS);
|
|
} else {
|
|
arith_wasoper = 1;
|
|
return(ARITH_SUBT);
|
|
}
|
|
}
|
|
"!" { arith_wasoper = 1; return(ARITH_NOT); }
|
|
. { error("arith: syntax error: \"%s\"\n", arith_startbuf); }
|
|
%%
|
|
|
|
arith_lex_reset() {
|
|
YY_NEW_FILE;
|
|
}
|