source4/heimdal/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 void yyerror (const char *s);
  39 #define yyerror yyerror
  40 static long name2number(const char *str);
  41
  42 extern char *yytext;
  43
  44 /* This is for bison */
  45
  46 #if !defined(alloca) && !defined(HAVE_ALLOCA)
  47 #define alloca(x) malloc(x)
  48 #endif
  49
  50 #define YYMALLOC malloc
  51 #define YYFREE free
  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_id = name2number($2);
  83                     strlcpy(name, $2, sizeof(name));
  84                     free($2);
  85                 }
  86                 | ET STRING STRING
  87                 {
  88                     base_id = name2number($2);
  89                     strlcpy(name, $3, sizeof(name));
  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                     free(prefix);
 106                     asprintf (&prefix, "%s_", $2);
 107                     if (prefix == NULL)
 108                         errx(1, "malloc");
 109                     free($2);
 110                 }
 111                 | PREFIX
 112                 {
 113                     prefix = realloc(prefix, 1);
 114                     if (prefix == NULL)
 115                         errx(1, "malloc");
 116                     *prefix = '\0';
 117                 }
 118                 | EC STRING ',' STRING
 119                 {
 120                     struct error_code *ec = malloc(sizeof(*ec));
 121
 122                     if (ec == NULL)
 123                         errx(1, "malloc");
 124
 125                     ec->next = NULL;
 126                     ec->number = number;
 127                     if(prefix && *prefix != '\0') {
 128                         asprintf (&ec->name, "%s%s", prefix, $2);
 129                         if (ec->name == NULL)
 130                             errx(1, "malloc");
 131                         free($2);
 132                     } else
 133                         ec->name = $2;
 134                     ec->string = $4;
 135                     APPEND(codes, ec);
 136                     number++;
 137                 }
 138                 | END
 139                 {
 140                         YYACCEPT;
 141                 }
 142                 ;
 143
 144 %%
 145
 146 static long
 147 name2number(const char *str)
 148 {
 149     const char *p;
 150     long num = 0;
 151     const char *x = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 152         "abcdefghijklmnopqrstuvwxyz0123456789_";
 153     if(strlen(str) > 4) {
 154         yyerror("table name too long");
 155         return 0;
 156     }
 157     for(p = str; *p; p++){
 158         char *q = strchr(x, *p);
 159         if(q == NULL) {
 160             yyerror("invalid character in table name");
 161             return 0;
 162         }
 163         num = (num << 6) + (q - x) + 1;
 164     }
 165     num <<= 8;
 166     if(num > 0x7fffffff)
 167         num = -(0xffffffff - num + 1);
 168     return num;
 169 }
 170
 171 void
 172 yyerror (const char *s)
 173 {
 174      _lex_error_message ("%s\n", s);
 175 }