1 %option nounput noinput
2 %{
3 /* $OpenBSD: tokenizer.l,v 1.8 2012/04/12 17:00:11 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 * $FreeBSD$
20 */
21 #include "parser.h"
22 #include <assert.h>
23 #include <stdlib.h>
24 #include <errno.h>
25 #include <stdint.h>
26 #include <limits.h>
27
28 extern int mimic_gnu;
29 extern int32_t yylval;
30
31 int32_t number(void);
32 int32_t parse_radix(void);
33 extern int yylex(void);
34
35 #define YY_DECL int yylex(void)
36 %}
37
38 delim [ \t\n]
39 ws {delim}+
40 hex 0[xX][0-9a-fA-F]+
41 oct 0[0-7]*
42 dec [1-9][0-9]*
43 radix 0[rR][0-9]+:[0-9a-zA-Z]+
44
45 %%
46 {ws} {/* just skip it */}
47 {hex}|{oct}|{dec} { yylval = number(); return(NUMBER); }
48 {radix} { if (mimic_gnu) {
49 yylval = parse_radix(); return(NUMBER);
50 } else {
51 return(ERROR);
52 }
53 }
54 "<=" { return(LE); }
55 ">=" { return(GE); }
56 "<<" { return(LSHIFT); }
57 ">>" { return(RSHIFT); }
58 "==" { return(EQ); }
59 "!=" { return(NE); }
60 "&&" { return(LAND); }
61 "||" { return(LOR); }
62 "**" { if (mimic_gnu) { return (EXPONENT); } }
63 . { return yytext[0]; }
64 %%
65
66 int32_t
67 number(void)
68 {
69 long l;
70
71 errno = 0;
72 l = strtol(yytext, NULL, 0);
73 if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
74 l > INT32_MAX || l < INT32_MIN) {
75 fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext);
76 }
77 return l;
78 }
79
80 int32_t
parse_radix(void)81 parse_radix(void)
82 {
83 long base;
84 char *next;
85 long l;
86 int d;
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 d = *next - '0';
97 else if (*next >= 'a' && *next <= 'z')
98 d = *next - 'a' + 10;
99 else {
100 assert(*next >= 'A' && *next <= 'Z');
101 d = *next - 'A' + 10;
102 }
103 if (d >= base) {
104 fprintf(stderr,
105 "m4: error in number %s\n", yytext);
106 return 0;
107 }
108 l = base * l + d;
109 next++;
110 }
111 }
112 return l;
113 }
114
115