1 %option nounput noinput
2 %{
3 /* $OpenBSD: tokenizer.l,v 1.9 2017/06/15 13:48:42 bcallah Exp $ */
4 /*
5 * Copyright (c) 2004 Marc Espie <[email protected]>
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 void m4_warnx(const char *, ...);
29 extern int mimic_gnu;
30 extern int32_t yylval;
31
32 int32_t number(void);
33 int32_t parse_radix(void);
34 extern int yylex(void);
35
36 #define YY_DECL int yylex(void)
37 %}
38
39 delim [ \t\n]
40 ws {delim}+
41 hex 0[xX][0-9a-fA-F]+
42 oct 0[0-7]*
43 dec [1-9][0-9]*
44 radix 0[rR][0-9]+:[0-9a-zA-Z]+
45
46 %option noyywrap
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 "**" { if (mimic_gnu) { return (EXPONENT); } }
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 m4_warnx("numeric overflow in expr: %s", 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 int d;
90
91 l = 0;
92 base = strtol(yytext+2, &next, 0);
93 if (base > 36 || next == NULL) {
94 m4_warnx("error in number %s", yytext);
95 } else {
96 next++;
97 while (*next != 0) {
98 if (*next >= '0' && *next <= '9')
99 d = *next - '0';
100 else if (*next >= 'a' && *next <= 'z')
101 d = *next - 'a' + 10;
102 else {
103 assert(*next >= 'A' && *next <= 'Z');
104 d = *next - 'A' + 10;
105 }
106 if (d >= base) {
107 m4_warnx("error in number %s", yytext);
108 return 0;
109 }
110 l = base * l + d;
111 next++;
112 }
113 }
114 return l;
115 }
116
117