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: src/usr.bin/m4/tokenizer.l,v 1.3 2012/11/17 01:54:24 svnexp Exp $ 20 */ 21 22 #include "parser.h" 23 #include <assert.h> 24 #include <stdlib.h> 25 #include <errno.h> 26 #include <stdint.h> 27 #include <limits.h> 28 #include <sys/param.h> 29 30 extern int mimic_gnu; 31 extern int32_t yylval; 32 33 int32_t number(void); 34 int32_t parse_radix(void); 35 %} 36 37 delim [ \t\n] 38 ws {delim}+ 39 hex 0[xX][0-9a-fA-F]+ 40 oct 0[0-7]* 41 dec [1-9][0-9]* 42 radix 0[rR][0-9]+:[0-9a-zA-Z]+ 43 44 %% 45 {ws} {/* just skip it */} 46 {hex}|{oct}|{dec} { yylval = number(); return(NUMBER); } 47 {radix} { if (mimic_gnu) { 48 yylval = parse_radix(); return(NUMBER); 49 } else { 50 return(ERROR); 51 } 52 } 53 "<=" { return(LE); } 54 ">=" { return(GE); } 55 "<<" { return(LSHIFT); } 56 ">>" { return(RSHIFT); } 57 "==" { return(EQ); } 58 "!=" { return(NE); } 59 "&&" { return(LAND); } 60 "||" { return(LOR); } 61 "**" { if (mimic_gnu) { return (EXPONENT); } } 62 . { return yytext[0]; } 63 %% 64 65 int32_t 66 number(void) 67 { 68 long l; 69 70 errno = 0; 71 l = strtol(yytext, NULL, 0); 72 if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) || 73 l > INT32_MAX || l < INT32_MIN) { 74 fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext); 75 } 76 return l; 77 } 78 79 int32_t 80 parse_radix(void) 81 { 82 long base; 83 char *next; 84 long l; 85 int d; 86 87 l = 0; 88 base = strtol(yytext + 2, &next, 0); 89 if (base > 36 || next == NULL) { 90 fprintf(stderr, "m4: error in number %s\n", yytext); 91 } else { 92 next++; 93 while (*next != 0) { 94 if (*next >= '0' && *next <= '9') 95 d = *next - '0'; 96 else if (*next >= 'a' && *next <= 'z') 97 d = *next - 'a' + 10; 98 else { 99 assert(*next >= 'A' && *next <= 'Z'); 100 d = *next - 'A' + 10; 101 } 102 if (d >= base) { 103 fprintf(stderr, 104 "m4: error in number %s\n", yytext); 105 return 0; 106 } 107 l = base * l + d; 108 next++; 109 } 110 } 111 return l; 112 } 113