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%{
/*-
* 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.
* 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.
*/
#if 0
#ifndef lint
static char sccsid[] = "@(#)arith_lex.l 8.3 (Berkeley) 5/4/95";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <string.h>
#include "arith.h"
#include "shell.h"
#include "y.tab.h"
#include "error.h"
#include "memalloc.h"
#include "var.h"
int yylex(void);
#undef YY_INPUT
#define YY_INPUT(buf,result,max) \
result = (*buf = *arith_buf++) ? 1 : YY_NULL;
#define YY_NO_UNPUT
%}
%%
[ \t\n] { ; }
0x[a-fA-F0-9]+ {
yylval.l_value = strtoarith_t(yytext, NULL, 16);
return ARITH_NUM;
}
0[0-7]+ {
yylval.l_value = strtoarith_t(yytext, NULL, 8);
return ARITH_NUM;
}
[0-9]+ {
yylval.l_value = strtoarith_t(yytext, NULL, 10);
return ARITH_NUM;
}
[A-Za-z][A-Za-z0-9_]* {
/*
* If variable doesn't exist, we should initialize
* it to zero.
*/
char *temp;
if (lookupvar(yytext) == NULL)
setvarsafe(yytext, "0", 0);
temp = (char *)ckmalloc(strlen(yytext) + 1);
yylval.s_value = strcpy(temp, yytext);
return ARITH_VAR;
}
"(" { return ARITH_LPAREN; }
")" { return ARITH_RPAREN; }
"||" { return ARITH_OR; }
"&&" { return ARITH_AND; }
"|" { return ARITH_BOR; }
"^" { return ARITH_BXOR; }
"&" { return ARITH_BAND; }
"==" { return ARITH_EQ; }
"!=" { return ARITH_NE; }
">" { return ARITH_GT; }
">=" { return ARITH_GE; }
"<" { return ARITH_LT; }
"<=" { return ARITH_LE; }
"<<" { return ARITH_LSHIFT; }
">>" { return ARITH_RSHIFT; }
"*" { return ARITH_MUL; }
"/" { return ARITH_DIV; }
"%" { return ARITH_REM; }
"+" { return ARITH_ADD; }
"-" { return ARITH_SUB; }
"~" { return ARITH_BNOT; }
"!" { return ARITH_NOT; }
"=" { return ARITH_ASSIGN; }
"+=" { return ARITH_ADDASSIGN; }
"-=" { return ARITH_SUBASSIGN; }
"*=" { return ARITH_MULASSIGN; }
"/=" { return ARITH_DIVASSIGN; }
"%=" { return ARITH_REMASSIGN; }
">>=" { return ARITH_RSHASSIGN; }
"<<=" { return ARITH_LSHASSIGN; }
"&=" { return ARITH_BANDASSIGN; }
"^=" { return ARITH_BXORASSIGN; }
"|=" { return ARITH_BORASSIGN; }
. {
error("arith: syntax error: \"%s\"\n", arith_startbuf);
}
%%
void
arith_lex_reset(void)
{
YY_NEW_FILE;
}
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