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tokenizer.l revision 1.3 
      1 %{
      2 /* $NetBSD: tokenizer.l,v 1.3 2009/10/28 21:42:47 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 1.3 2009/10/28 21:42:47 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 #define YY_NO_UNPUT
     38 %}
     39 
     40 delim 	[ \t\n]
     41 ws	{delim}+
     42 hex	0[xX][0-9a-fA-F]+
     43 oct	0[0-7]*
     44 dec	[1-9][0-9]*
     45 radix	0[rR][0-9]+:[0-9a-zA-Z]+
     46 
     47 %%
     48 {ws}			{/* just skip it */}
     49 {hex}|{oct}|{dec}	{ yylval = number(); return(NUMBER); }
     50 {radix}			{ if (mimic_gnu) {
     51 				yylval = parse_radix(); return(NUMBER);
     52 			  } else {
     53 			  	return(ERROR);
     54 			  }
     55 			}
     56 "<="			{ return(LE); }
     57 ">="			{ return(GE); }
     58 "<<"			{ return(LSHIFT); }
     59 ">>"			{ return(RSHIFT); }
     60 "=="			{ return(EQ); }
     61 "!="			{ return(NE); }
     62 "&&"			{ return(LAND); }
     63 "||"			{ return(LOR); }
     64 .			{ return yytext[0]; }
     65 %%
     66 
     67 int32_t
     68 number()
     69 {
     70 	long l;
     71 
     72 	errno = 0;
     73 	l = strtol(yytext, NULL, 0);
     74 	if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
     75 	    l > INT32_MAX || l < INT32_MIN) {
     76 		fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext);
     77 	}
     78 	return l;
     79 }
     80 
     81 int32_t
     82 parse_radix()
     83 {
     84 	long base;
     85 	char *next;
     86 	long l;
     87 
     88 	l = 0;
     89 	base = strtol(yytext+2, &next, 0);
     90 	if (base > 36 || next == NULL) {
     91 		fprintf(stderr, "m4: error in number %s\n", yytext);
     92 	} else {
     93 		next++;
     94 		while (*next != 0) {
     95 			if (*next >= '0' && *next <= '9')
     96 				l = base * l + *next - '0';
     97 			else if (*next >= 'a' && *next <= 'z')
     98 				l = base * l + *next - 'a' + 10;
     99 			else if (*next >= 'A' && *next <= 'Z')
    100 				l = base * l + *next - 'A' + 10;
    101 			next++;
    102 		}
    103 	}
    104 	return l;
    105 }
    106 
    107