usr/src/bin/sh/arith_lex.l

%{
/*-
 * 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.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)arith_lex.l 8.3 (Berkeley) %G%";
#endif /* not lint */

#include <unistd.h>
#include "y.tab.h"
#include "error.h"

extern yylval;
extern char *arith_buf, *arith_startbuf;
#undef YY_INPUT
#define YY_INPUT(buf,result,max) \
        result = (*buf = *arith_buf++) ? 1 : YY_NULL;
%}

%%
[ \t\n] { ; }
[0-9]+  { yylval = atol(yytext); return(ARITH_NUM); }
"("     { 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); }
.       { error("arith: syntax error: \"%s\"\n", arith_startbuf); }
%%

void
arith_lex_reset() {
        YY_NEW_FILE;
}