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 26extern void m4_warnx(const char *, ...); 27extern int mimic_gnu; 28extern int32_t yylval; 29 30int32_t number(void); 31int32_t parse_radix(void); 32extern int yylex(void); 33 34#define YY_DECL int yylex(void) 35%} 36 37delim [ \t\n] 38ws {delim}+ 39hex 0[xX][0-9a-fA-F]+ 40oct 0[0-7]* 41dec [1-9][0-9]* 42radix 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 67int32_t 68number(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 81int32_t 82parse_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