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@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
parse_radix(void)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