1 %option nounput noinput 2 %{ 3 /* $OpenBSD: tokenizer.l,v 1.9 2017/06/15 13:48:42 bcallah 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 #include "parser.h" 20 #include <assert.h> 21 #include <stdlib.h> 22 #include <errno.h> 23 #include <stdint.h> 24 #include <limits.h> 25 26 extern void m4_warnx(const char *, ...); 27 extern int mimic_gnu; 28 extern int32_t yylval; 29 30 int32_t number(void); 31 int32_t parse_radix(void); 32 extern int yylex(void); 33 34 #define YY_DECL int yylex(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 %option noyywrap 45 46 %% 47 {ws} {/* just skip it */} 48 {hex}|{oct}|{dec} { yylval = number(); return(NUMBER); } 49 {radix} { if (mimic_gnu) { 50 yylval = parse_radix(); return(NUMBER); 51 } else { 52 return(ERROR); 53 } 54 } 55 "<=" { return(LE); } 56 ">=" { return(GE); } 57 "<<" { return(LSHIFT); } 58 ">>" { return(RSHIFT); } 59 "==" { return(EQ); } 60 "!=" { return(NE); } 61 "&&" { return(LAND); } 62 "||" { return(LOR); } 63 "**" { if (mimic_gnu) { return (EXPONENT); } } 64 . { return yytext[0]; } 65 %% 66 67 int32_t 68 number(void) 69 { 70 long l; 71 72 errno = 0; 73 l = strtol(yytext, NULL, 0); 74 if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) || 75 l > INT32_MAX || l < INT32_MIN) { 76 m4_warnx("numeric overflow in expr: %s", yytext); 77 } 78 return l; 79 } 80 81 int32_t 82 parse_radix(void) 83 { 84 long base; 85 char *next; 86 long l; 87 int d; 88 89 l = 0; 90 base = strtol(yytext+2, &next, 0); 91 if (base > 36 || next == NULL) { 92 m4_warnx("error in number %s", yytext); 93 } else { 94 next++; 95 while (*next != 0) { 96 if (*next >= '0' && *next <= '9') 97 d = *next - '0'; 98 else if (*next >= 'a' && *next <= 'z') 99 d = *next - 'a' + 10; 100 else { 101 assert(*next >= 'A' && *next <= 'Z'); 102 d = *next - 'A' + 10; 103 } 104 if (d >= base) { 105 m4_warnx("error in number %s", yytext); 106 return 0; 107 } 108 l = base * l + d; 109 next++; 110 } 111 } 112 return l; 113 } 114 115