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      1 %{
      2 /* $NetBSD: tokenizer.l,v 1.6 2012/03/20 20:34:58 matt Exp $ */
      3 /* $OpenBSD: tokenizer.l,v 1.6 2008/08/21 21:00:14 espie Exp $ */
      4 /*
      5  * Copyright (c) 2004 Marc Espie <espie (at) cvs.openbsd.org>
      6  *
      7  * Permission to use, copy, modify, and distribute this software for any
      8  * purpose with or without fee is hereby granted, provided that the above
      9  * copyright notice and this permission notice appear in all copies.
     10  *
     11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18  */
     19 #if HAVE_NBTOOL_CONFIG_H
     20 #include "nbtool_config.h"
     21 #endif
     22 #include "parser.h"
     23 __RCSID("$NetBSD: tokenizer.l,v 1.6 2012/03/20 20:34:58 matt Exp $");
     24 #include <stdlib.h>
     25 #include <errno.h>
     26 #include <stdint.h>
     27 #include <limits.h>
     28 
     29 extern int mimic_gnu;
     30 extern int32_t yylval;
     31 extern int yylex(void);
     32 extern int yywrap(void);
     33 
     34 int32_t number(void);
     35 int32_t parse_radix(void);
     36 
     37 %}
     38 
     39 %option nounput
     40 %option noinput
     41 
     42 delim 	[ \t\n]
     43 ws	{delim}+
     44 hex	0[xX][0-9a-fA-F]+
     45 oct	0[0-7]*
     46 dec	[1-9][0-9]*
     47 radix	0[rR][0-9]+:[0-9a-zA-Z]+
     48 
     49 %%
     50 {ws}			{/* just skip it */}
     51 {hex}|{oct}|{dec}	{ yylval = number(); return(NUMBER); }
     52 {radix}			{ if (mimic_gnu) {
     53 				yylval = parse_radix(); return(NUMBER);
     54 			  } else {
     55 			  	return(ERROR);
     56 			  }
     57 			}
     58 "<="			{ return(LE); }
     59 ">="			{ return(GE); }
     60 "<<"			{ return(LSHIFT); }
     61 ">>"			{ return(RSHIFT); }
     62 "=="			{ return(EQ); }
     63 "!="			{ return(NE); }
     64 "&&"			{ return(LAND); }
     65 "||"			{ return(LOR); }
     66 .			{ return yytext[0]; }
     67 %%
     68 
     69 int32_t
     70 number(void)
     71 {
     72 	long l;
     73 
     74 	errno = 0;
     75 	l = strtol(yytext, NULL, 0);
     76 	if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
     77 	    l > INT32_MAX || l < INT32_MIN) {
     78 		fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext);
     79 	}
     80 	return l;
     81 }
     82 
     83 int32_t
     84 parse_radix(void)
     85 {
     86 	long base;
     87 	char *next;
     88 	long l;
     89 
     90 	l = 0;
     91 	base = strtol(yytext+2, &next, 0);
     92 	if (base > 36 || next == NULL) {
     93 		fprintf(stderr, "m4: error in number %s\n", yytext);
     94 	} else {
     95 		next++;
     96 		while (*next != 0) {
     97 			if (*next >= '0' && *next <= '9')
     98 				l = base * l + *next - '0';
     99 			else if (*next >= 'a' && *next <= 'z')
    100 				l = base * l + *next - 'a' + 10;
    101 			else if (*next >= 'A' && *next <= 'Z')
    102 				l = base * l + *next - 'A' + 10;
    103 			next++;
    104 		}
    105 	}
    106 	return l;
    107 }
    108 
    109