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%{
/* $OpenBSD: tokenizer.l,v 1.2 2004/05/12 21:28:35 espie Exp $ */
/*
* Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "parser.h"
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <limits.h>
extern int32_t yylval;
int32_t number(void);
%}
delim [ \t\n]
ws {delim}+
hex 0[xX][0-9a-fA-F]+
oct 0[0-7]*
dec [1-9][0-9]*
%%
{ws} {/* just skip it */}
{hex}|{oct}|{dec} { yylval = number(); return(NUMBER); }
"<=" { return(LE); }
">=" { return(GE); }
"<<" { return(LSHIFT); }
">>" { return(RSHIFT); }
"==" { return(EQ); }
"!=" { return(NE); }
"&&" { return(LAND); }
"||" { return(LOR); }
. { return yytext[0]; }
%%
int32_t
number()
{
long l;
errno = 0;
l = strtol(yytext, NULL, 0);
if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
l > 0x7fffffff || l < (-0x7fffffff - 1)) {
fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext);
}
return l;
}
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