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 /* $FreeBSD$ */ 35 36 #include "compile_et.h" 37 #include "lex.h" 38 #if 0 39 RCSID("$Id: parse.y,v 1.11 2000/06/22 00:42:52 assar Exp $"); 40 #endif 41 42 void yyerror (char *s); 43 static long name2number(const char *str); 44 45 extern char *yytext; 46 47 /* This is for bison */ 48 49 #if !defined(alloca) && !defined(HAVE_ALLOCA) 50 #define alloca(x) malloc(x) 51 #endif 52 53 %} 54 55 %union { 56 char *string; 57 int number; 58 } 59 60 %token ET INDEX PREFIX EC ID END 61 %token <string> STRING 62 %token <number> NUMBER 63 64 %% 65 66 file : /* */ 67 | header statements 68 ; 69 70 header : id et 71 | et 72 ; 73 74 id : ID STRING 75 { 76 id_str = $2; 77 } 78 ; 79 80 et : ET STRING 81 { 82 base = name2number($2); 83 strncpy(name, $2, sizeof(name)); 84 name[sizeof(name) - 1] = '\0'; 85 free($2); 86 } 87 | ET STRING STRING 88 { 89 base = name2number($2); 90 strncpy(name, $3, sizeof(name)); 91 name[sizeof(name) - 1] = '\0'; 92 free($2); 93 free($3); 94 } 95 ; 96 97 statements : statement 98 | statements statement 99 ; 100 101 statement : INDEX NUMBER 102 { 103 number = $2; 104 } 105 | PREFIX STRING 106 { 107 prefix = realloc(prefix, strlen($2) + 2); 108 strcpy(prefix, $2); 109 strcat(prefix, "_"); 110 free($2); 111 } 112 | PREFIX 113 { 114 prefix = realloc(prefix, 1); 115 *prefix = '\0'; 116 } 117 | EC STRING ',' STRING 118 { 119 struct error_code *ec = malloc(sizeof(*ec)); 120 121 ec->next = NULL; 122 ec->number = number; 123 if(prefix && *prefix != '\0') { 124 asprintf (&ec->name, "%s%s", prefix, $2); 125 free($2); 126 } else 127 ec->name = $2; 128 ec->string = $4; 129 APPEND(codes, ec); 130 number++; 131 } 132 | END 133 { 134 YYACCEPT; 135 } 136 ; 137 138 %% 139 140 static long 141 name2number(const char *str) 142 { 143 const char *p; 144 long base = 0; 145 const char *x = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 146 "abcdefghijklmnopqrstuvwxyz0123456789_"; 147 if(strlen(str) > 4) { 148 yyerror("table name too long"); 149 return 0; 150 } 151 for(p = str; *p; p++){ 152 char *q = strchr(x, *p); 153 if(q == NULL) { 154 yyerror("invalid character in table name"); 155 return 0; 156 } 157 base = (base << 6) + (q - x) + 1; 158 } 159 base <<= 8; 160 if(base > 0x7fffffff) 161 base = -(0xffffffff - base + 1); 162 return base; 163 } 164 165 void 166 yyerror (char *s) 167 { 168 error_message ("%s\n", s); 169 } 170