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tokenizer.l revision 1.4 
      1 %{
      2 /* $NetBSD: tokenizer.l,v 1.4 2009/10/29 14:49:03 christos 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 1.4 2009/10/29 14:49:03 christos 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 
     41 delim 	[ \t\n]
     42 ws	{delim}+
     43 hex	0[xX][0-9a-fA-F]+
     44 oct	0[0-7]*
     45 dec	[1-9][0-9]*
     46 radix	0[rR][0-9]+:[0-9a-zA-Z]+
     47 
     48 %%
     49 {ws}			{/* just skip it */}
     50 {hex}|{oct}|{dec}	{ yylval = number(); return(NUMBER); }
     51 {radix}			{ if (mimic_gnu) {
     52 				yylval = parse_radix(); return(NUMBER);
     53 			  } else {
     54 			  	return(ERROR);
     55 			  }
     56 			}
     57 "<="			{ return(LE); }
     58 ">="			{ return(GE); }
     59 "<<"			{ return(LSHIFT); }
     60 ">>"			{ return(RSHIFT); }
     61 "=="			{ return(EQ); }
     62 "!="			{ return(NE); }
     63 "&&"			{ return(LAND); }
     64 "||"			{ return(LOR); }
     65 .			{ return yytext[0]; }
     66 %%
     67 
     68 int32_t
     69 number()
     70 {
     71 	long l;
     72 
     73 	errno = 0;
     74 	l = strtol(yytext, NULL, 0);
     75 	if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
     76 	    l > INT32_MAX || l < INT32_MIN) {
     77 		fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext);
     78 	}
     79 	return l;
     80 }
     81 
     82 int32_t
     83 parse_radix()
     84 {
     85 	long base;
     86 	char *next;
     87 	long l;
     88 
     89 	l = 0;
     90 	base = strtol(yytext+2, &next, 0);
     91 	if (base > 36 || next == NULL) {
     92 		fprintf(stderr, "m4: error in number %s\n", yytext);
     93 	} else {
     94 		next++;
     95 		while (*next != 0) {
     96 			if (*next >= '0' && *next <= '9')
     97 				l = base * l + *next - '0';
     98 			else if (*next >= 'a' && *next <= 'z')
     99 				l = base * l + *next - 'a' + 10;
    100 			else if (*next >= 'A' && *next <= 'Z')
    101 				l = base * l + *next - 'A' + 10;
    102 			next++;
    103 		}
    104 	}
    105 	return l;
    106 }
    107 
    108