1 %{ 2 /* $OpenBSD: tokenizer.l,v 1.7 2010/03/22 20:40:44 espie Exp $ */ 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" 19 #include <assert.h> 20 #include <stdlib.h> 21 #include <errno.h> 22 #include <stdint.h> 23 #include <limits.h> 24 25 extern int mimic_gnu; 26 extern int32_t yylval; 27 28 int32_t number(void); 29 int32_t parse_radix(void); 30 %} 31 32 delim [ \t\n] 33 ws {delim}+ 34 hex 0[xX][0-9a-fA-F]+ 35 oct 0[0-7]* 36 dec [1-9][0-9]* 37 radix 0[rR][0-9]+:[0-9a-zA-Z]+ 38 39 %% 40 {ws} {/* just skip it */} 41 {hex}|{oct}|{dec} { yylval = number(); return(NUMBER); } 42 {radix} { if (mimic_gnu) { 43 yylval = parse_radix(); return(NUMBER); 44 } else { 45 return(ERROR); 46 } 47 } 48 "<=" { return(LE); } 49 ">=" { return(GE); } 50 "<<" { return(LSHIFT); } 51 ">>" { return(RSHIFT); } 52 "==" { return(EQ); } 53 "!=" { return(NE); } 54 "&&" { return(LAND); } 55 "||" { return(LOR); } 56 . { return yytext[0]; } 57 %% 58 59 int32_t 60 number() 61 { 62 long l; 63 64 errno = 0; 65 l = strtol(yytext, NULL, 0); 66 if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) || 67 l > INT32_MAX || l < INT32_MIN) { 68 fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext); 69 } 70 return l; 71 } 72 73 int32_t 74 parse_radix() 75 { 76 long base; 77 char *next; 78 long l; 79 int d; 80 81 l = 0; 82 base = strtol(yytext+2, &next, 0); 83 if (base > 36 || next == NULL) { 84 fprintf(stderr, "m4: error in number %s\n", yytext); 85 } else { 86 next++; 87 while (*next != 0) { 88 if (*next >= '0' && *next <= '9') 89 d = *next - '0'; 90 else if (*next >= 'a' && *next <= 'z') 91 d = *next - 'a' + 10; 92 else { 93 assert(*next >= 'A' && *next <= 'Z'); 94 d = *next - 'A' + 10; 95 } 96 if (d >= base) { 97 fprintf(stderr, 98 "m4: error in number %s\n", yytext); 99 return 0; 100 } 101 l = base * l + d; 102 next++; 103 } 104 } 105 return l; 106 } 107 108