1 %{ 2 /* 3 * Copyright (c) 1998 - 2000 Kungliga Tekniska H�gskolan 4 * (Royal Institute of Technology, Stockholm, Sweden). 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * 3. Neither the name of the Institute nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "compile_et.h" 36 #include "lex.h" 37 38 RCSID("$Id: parse.y 15426 2005-06-16 19:21:42Z lha $"); 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 %} 52 53 %union { 54 char *string; 55 int number; 56 } 57 58 %token ET INDEX PREFIX EC ID END 59 %token <string> STRING 60 %token <number> NUMBER 61 62 %% 63 64 file : /* */ 65 | header statements 66 ; 67 68 header : id et 69 | et 70 ; 71 72 id : ID STRING 73 { 74 id_str = $2; 75 } 76 ; 77 78 et : ET STRING 79 { 80 base_id = name2number($2); 81 strlcpy(name, $2, sizeof(name)); 82 free($2); 83 } 84 | ET STRING STRING 85 { 86 base_id = name2number($2); 87 strlcpy(name, $3, sizeof(name)); 88 free($2); 89 free($3); 90 } 91 ; 92 93 statements : statement 94 | statements statement 95 ; 96 97 statement : INDEX NUMBER 98 { 99 number = $2; 100 } 101 | PREFIX STRING 102 { 103 free(prefix); 104 asprintf (&prefix, "%s_", $2); 105 if (prefix == NULL) 106 errx(1, "malloc"); 107 free($2); 108 } 109 | PREFIX 110 { 111 prefix = realloc(prefix, 1); 112 if (prefix == NULL) 113 errx(1, "malloc"); 114 *prefix = '\0'; 115 } 116 | EC STRING ',' STRING 117 { 118 struct error_code *ec = malloc(sizeof(*ec)); 119 120 if (ec == NULL) 121 errx(1, "malloc"); 122 123 ec->next = NULL; 124 ec->number = number; 125 if(prefix && *prefix != '\0') { 126 asprintf (&ec->name, "%s%s", prefix, $2); 127 if (ec->name == NULL) 128 errx(1, "malloc"); 129 free($2); 130 } else 131 ec->name = $2; 132 ec->string = $4; 133 APPEND(codes, ec); 134 number++; 135 } 136 | END 137 { 138 YYACCEPT; 139 } 140 ; 141 142 %% 143 144 static long 145 name2number(const char *str) 146 { 147 const char *p; 148 long num = 0; 149 const char *x = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 150 "abcdefghijklmnopqrstuvwxyz0123456789_"; 151 if(strlen(str) > 4) { 152 yyerror("table name too long"); 153 return 0; 154 } 155 for(p = str; *p; p++){ 156 char *q = strchr(x, *p); 157 if(q == NULL) { 158 yyerror("invalid character in table name"); 159 return 0; 160 } 161 num = (num << 6) + (q - x) + 1; 162 } 163 num <<= 8; 164 if(num > 0x7fffffff) 165 num = -(0xffffffff - num + 1); 166 return num; 167 } 168 169 void 170 yyerror (char *s) 171 { 172 error_message ("%s\n", s); 173 } 174