1 /* $NetBSD: sel-lex.l,v 1.2 2017/01/28 21:31:48 christos Exp $ */ 2 3 %{ 4 /* 5 * Copyright (c) 2004, 2008 Kungliga Tekniska Högskolan 6 * (Royal Institute of Technology, Stockholm, Sweden). 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * 3. Neither the name of the Institute nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 /* Id */ 38 39 #ifdef __GNUC__ 40 #pragma GCC diagnostic ignored "-Wunused-function" 41 #endif 42 43 44 #ifdef HAVE_CONFIG_H 45 #include <config.h> 46 #endif 47 48 #undef ECHO 49 50 #include <stdio.h> 51 #include <string.h> 52 #include <stdarg.h> 53 #include <stdlib.h> 54 #include "sel.h" 55 #include "sel-gram.h" 56 unsigned lineno = 1; 57 58 static char * handle_string(void); 59 static int lex_input(char *, int); 60 61 struct hx_expr_input _hx509_expr_input; 62 63 #ifndef YY_NULL 64 #define YY_NULL 0 65 #endif 66 67 #define YY_NO_UNPUT 1 68 69 #undef YY_INPUT 70 #define YY_INPUT(buf,res,maxsize) (res = lex_input(buf, maxsize)) 71 72 #undef ECHO 73 74 %} 75 %% 76 77 TRUE { return kw_TRUE; } 78 FALSE { return kw_FALSE; } 79 AND { return kw_AND; } 80 OR { return kw_OR; } 81 IN { return kw_IN; } 82 TAILMATCH { return kw_TAILMATCH; } 83 84 [A-Za-z][-A-Za-z0-9_]* { 85 yylval.string = strdup ((const char *)yytext); 86 return IDENTIFIER; 87 } 88 "\"" { yylval.string = handle_string(); return STRING; } 89 \n { ++lineno; } 90 [,.!={}()%] { return *yytext; } 91 [ \t] ; 92 %% 93 94 static char * 95 handle_string(void) 96 { 97 char x[1024]; 98 int i = 0; 99 int c; 100 int quote = 0; 101 while((c = input()) != EOF){ 102 if(quote) { 103 x[i++] = '\\'; 104 x[i++] = c; 105 quote = 0; 106 continue; 107 } 108 if(c == '\n'){ 109 _hx509_sel_yyerror("unterminated string"); 110 lineno++; 111 break; 112 } 113 if(c == '\\'){ 114 quote++; 115 continue; 116 } 117 if(c == '\"') 118 break; 119 x[i++] = c; 120 } 121 x[i] = '\0'; 122 return strdup(x); 123 } 124 125 int 126 yywrap () 127 { 128 return 1; 129 } 130 131 static int 132 lex_input(char *buf, int max_size) 133 { 134 int n; 135 136 n = _hx509_expr_input.length - _hx509_expr_input.offset; 137 if (max_size < n) 138 n = max_size; 139 if (n <= 0) 140 return YY_NULL; 141 142 memcpy(buf, _hx509_expr_input.buf + _hx509_expr_input.offset, n); 143 _hx509_expr_input.offset += n; 144 145 return n; 146 } 147