crypto/heimdal-0.6.3/lib/com_err/parse.y

   1 %{
   2 /*
   3  * Copyright (c) 1998 - 2000 Kungliga Tekniska Högskolan
   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 }