1 %option nounput noinput 2 %{ 3 /* $OpenBSD: tokenizer.l,v 1.7 2010/03/22 20:40:44 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 36 delim [ \t\n] 37 ws {delim}+ 38 hex 0[xX][0-9a-fA-F]+ 39 oct 0[0-7]* 40 dec [1-9][0-9]* 41 radix 0[rR][0-9]+:[0-9a-zA-Z]+ 42 43 %% 44 {ws} {/* just skip it */} 45 {hex}|{oct}|{dec} { yylval = number(); return(NUMBER); } 46 {radix} { if (mimic_gnu) { 47 yylval = parse_radix(); return(NUMBER); 48 } else { 49 return(ERROR); 50 } 51 } 52 "<=" { return(LE); } 53 ">=" { return(GE); } 54 "<<" { return(LSHIFT); } 55 ">>" { return(RSHIFT); } 56 "==" { return(EQ); } 57 "!=" { return(NE); } 58 "&&" { return(LAND); } 59 "||" { return(LOR); } 60 "**" { if (mimic_gnu) { return (EXPONENT); } } 61 . { return yytext[0]; } 62 %% 63 64 int32_t 65 number(void) 66 { 67 long l; 68 69 errno = 0; 70 l = strtol(yytext, NULL, 0); 71 if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) || 72 l > INT32_MAX || l < INT32_MIN) { 73 fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext); 74 } 75 return l; 76 } 77 78 int32_t 79 parse_radix(void) 80 { 81 long base; 82 char *next; 83 long l; 84 int d; 85 86 l = 0; 87 base = strtol(yytext+2, &next, 0); 88 if (base > 36 || next == NULL) { 89 fprintf(stderr, "m4: error in number %s\n", yytext); 90 } else { 91 next++; 92 while (*next != 0) { 93 if (*next >= '0' && *next <= '9') 94 d = *next - '0'; 95 else if (*next >= 'a' && *next <= 'z') 96 d = *next - 'a' + 10; 97 else { 98 assert(*next >= 'A' && *next <= 'Z'); 99 d = *next - 'A' + 10; 100 } 101 if (d >= base) { 102 fprintf(stderr, 103 "m4: error in number %s\n", yytext); 104 return 0; 105 } 106 l = base * l + d; 107 next++; 108 } 109 } 110 return l; 111 } 112 113