Annotation of src/usr.bin/m4/tokenizer.l, Revision 1.10
1.1 espie 1: %{
1.10 ! bcallah 2: /* $OpenBSD: tokenizer.l,v 1.9 2017/06/15 13:48:42 bcallah Exp $ */
1.1 espie 3: /*
4: * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18: #include "parser.h"
1.7 espie 19: #include <assert.h>
1.1 espie 20: #include <stdlib.h>
21: #include <errno.h>
1.3 espie 22: #include <stdint.h>
1.1 espie 23: #include <limits.h>
1.2 espie 24:
1.9 bcallah 25: extern void m4_warnx(const char *, ...);
1.6 espie 26: extern int mimic_gnu;
1.1 espie 27: extern int32_t yylval;
28:
29: int32_t number(void);
1.6 espie 30: int32_t parse_radix(void);
1.1 espie 31: %}
32:
33: delim [ \t\n]
34: ws {delim}+
35: hex 0[xX][0-9a-fA-F]+
36: oct 0[0-7]*
37: dec [1-9][0-9]*
1.6 espie 38: radix 0[rR][0-9]+:[0-9a-zA-Z]+
1.10 ! bcallah 39:
! 40: %option noyywrap
1.1 espie 41:
42: %%
1.2 espie 43: {ws} {/* just skip it */}
44: {hex}|{oct}|{dec} { yylval = number(); return(NUMBER); }
1.6 espie 45: {radix} { if (mimic_gnu) {
46: yylval = parse_radix(); return(NUMBER);
47: } else {
48: return(ERROR);
49: }
50: }
1.2 espie 51: "<=" { return(LE); }
52: ">=" { return(GE); }
53: "<<" { return(LSHIFT); }
54: ">>" { return(RSHIFT); }
55: "==" { return(EQ); }
56: "!=" { return(NE); }
57: "&&" { return(LAND); }
58: "||" { return(LOR); }
1.8 espie 59: "**" { if (mimic_gnu) { return (EXPONENT); } }
1.2 espie 60: . { return yytext[0]; }
1.1 espie 61: %%
62:
63: int32_t
64: number()
65: {
66: long l;
67:
68: errno = 0;
69: l = strtol(yytext, NULL, 0);
70: if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
1.9 bcallah 71: l > INT32_MAX || l < INT32_MIN)
72: m4_warnx("numeric overflow in expr: %s", yytext);
1.1 espie 73: return l;
1.6 espie 74: }
75:
76: int32_t
77: parse_radix()
78: {
79: long base;
80: char *next;
81: long l;
1.7 espie 82: int d;
1.1 espie 83:
1.6 espie 84: l = 0;
85: base = strtol(yytext+2, &next, 0);
86: if (base > 36 || next == NULL) {
1.9 bcallah 87: m4_warnx("error in number %s", yytext);
1.6 espie 88: } else {
89: next++;
90: while (*next != 0) {
91: if (*next >= '0' && *next <= '9')
1.7 espie 92: d = *next - '0';
1.6 espie 93: else if (*next >= 'a' && *next <= 'z')
1.7 espie 94: d = *next - 'a' + 10;
95: else {
96: assert(*next >= 'A' && *next <= 'Z');
97: d = *next - 'A' + 10;
98: }
99: if (d >= base) {
1.9 bcallah 100: m4_warnx("error in number %s", yytext);
1.7 espie 101: return 0;
102: }
103: l = base * l + d;
1.6 espie 104: next++;
105: }
106: }
107: return l;
1.1 espie 108: }
1.6 espie 109: