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,v 1.11 2000/06/22 00:42:52 assar Exp $"); 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 = name2number($2); 81 strncpy(name, $2, sizeof(name)); 82 name[sizeof(name) - 1] = '\0'; 83 free($2); 84 } 85 | ET STRING STRING 86 { 87 base = name2number($2); 88 strncpy(name, $3, sizeof(name)); 89 name[sizeof(name) - 1] = '\0'; 90 free($2); 91 free($3); 92 } 93 ; 94 95 statements : statement 96 | statements statement 97 ; 98 99 statement : INDEX NUMBER 100 { 101 number = $2; 102 } 103 | PREFIX STRING 104 { 105 prefix = realloc(prefix, strlen($2) + 2); 106 strcpy(prefix, $2); 107 strcat(prefix, "_"); 108 free($2); 109 } 110 | PREFIX 111 { 112 prefix = realloc(prefix, 1); 113 *prefix = '\0'; 114 } 115 | EC STRING ',' STRING 116 { 117 struct error_code *ec = malloc(sizeof(*ec)); 118 119 ec->next = NULL; 120 ec->number = number; 121 if(prefix && *prefix != '\0') { 122 asprintf (&ec->name, "%s%s", prefix, $2); 123 free($2); 124 } else 125 ec->name = $2; 126 ec->string = $4; 127 APPEND(codes, ec); 128 number++; 129 } 130 | END 131 { 132 YYACCEPT; 133 } 134 ; 135 136 %% 137 138 static long 139 name2number(const char *str) 140 { 141 const char *p; 142 long base = 0; 143 const char *x = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 144 "abcdefghijklmnopqrstuvwxyz0123456789_"; 145 if(strlen(str) > 4) { 146 yyerror("table name too long"); 147 return 0; 148 } 149 for(p = str; *p; p++){ 150 char *q = strchr(x, *p); 151 if(q == NULL) { 152 yyerror("invalid character in table name"); 153 return 0; 154 } 155 base = (base << 6) + (q - x) + 1; 156 } 157 base <<= 8; 158 if(base > 0x7fffffff) 159 base = -(0xffffffff - base + 1); 160 return base; 161 } 162 163 void 164 yyerror (char *s) 165 { 166 error_message ("%s\n", s); 167 } 168