1 /* $NetBSD: parse.y,v 1.1.1.2 2014/04/24 12:45:28 pettai Exp $ */ 2 3 %{ 4 /* 5 * Copyright (c) 1998 - 2000 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 #include "compile_et.h" 38 #include "lex.h" 39 40 void yyerror (char *s); 41 static long name2number(const char *str); 42 43 extern char *yytext; 44 45 /* This is for bison */ 46 47 #if !defined(alloca) && !defined(HAVE_ALLOCA) 48 #define alloca(x) malloc(x) 49 #endif 50 51 #define YYMALLOC malloc 52 #define YYFREE free 53 54 %} 55 56 %union { 57 char *string; 58 int number; 59 } 60 61 %token ET INDEX PREFIX EC ID END 62 %token <string> STRING 63 %token <number> NUMBER 64 65 %% 66 67 file : /* */ 68 | header statements 69 ; 70 71 header : id et 72 | et 73 ; 74 75 id : ID STRING 76 { 77 id_str = $2; 78 } 79 ; 80 81 et : ET STRING 82 { 83 base_id = name2number($2); 84 strlcpy(name, $2, sizeof(name)); 85 free($2); 86 } 87 | ET STRING STRING 88 { 89 base_id = name2number($2); 90 strlcpy(name, $3, sizeof(name)); 91 free($2); 92 free($3); 93 } 94 ; 95 96 statements : statement 97 | statements statement 98 ; 99 100 statement : INDEX NUMBER 101 { 102 number = $2; 103 } 104 | PREFIX STRING 105 { 106 free(prefix); 107 asprintf (&prefix, "%s_", $2); 108 if (prefix == NULL) 109 errx(1, "malloc"); 110 free($2); 111 } 112 | PREFIX 113 { 114 prefix = realloc(prefix, 1); 115 if (prefix == NULL) 116 errx(1, "malloc"); 117 *prefix = '\0'; 118 } 119 | EC STRING ',' STRING 120 { 121 struct error_code *ec = malloc(sizeof(*ec)); 122 123 if (ec == NULL) 124 errx(1, "malloc"); 125 126 ec->next = NULL; 127 ec->number = number; 128 if(prefix && *prefix != '\0') { 129 asprintf (&ec->name, "%s%s", prefix, $2); 130 if (ec->name == NULL) 131 errx(1, "malloc"); 132 free($2); 133 } else 134 ec->name = $2; 135 ec->string = $4; 136 APPEND(codes, ec); 137 number++; 138 } 139 | END 140 { 141 YYACCEPT; 142 } 143 ; 144 145 %% 146 147 static long 148 name2number(const char *str) 149 { 150 const char *p; 151 long num = 0; 152 const char *x = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 153 "abcdefghijklmnopqrstuvwxyz0123456789_"; 154 if(strlen(str) > 4) { 155 yyerror("table name too long"); 156 return 0; 157 } 158 for(p = str; *p; p++){ 159 char *q = strchr(x, *p); 160 if(q == NULL) { 161 yyerror("invalid character in table name"); 162 return 0; 163 } 164 num = (num << 6) + (q - x) + 1; 165 } 166 num <<= 8; 167 if(num > 0x7fffffff) 168 num = -(0xffffffff - num + 1); 169 return num; 170 } 171 172 void 173 yyerror (char *s) 174 { 175 _lex_error_message ("%s\n", s); 176 } 177