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 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