crypto/dist/heimdal/lib/sl/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 "make_cmds.h"
  36 __RCSID("$Heimdal: parse.y 21745 2007-07-31 16:11:25Z lha $"
  37         "$NetBSD$");
  38
  39 static void yyerror (char *s);
  40
  41 struct string_list* append_string(struct string_list*, char*);
  42 void free_string_list(struct string_list *list);
  43 unsigned string_to_flag(const char *);
  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   unsigned number;
  56   struct string_list *list;
  57 }
  58
  59 %token TABLE REQUEST UNKNOWN UNIMPLEMENTED END
  60 %token <string> STRING
  61 %type <number> flag flags
  62 %type <list> aliases
  63
  64 %%
  65
  66 file            : /* */
  67                 | statements
  68                 ;
  69
  70 statements      : statement
  71                 | statements statement
  72                 ;
  73
  74 statement       : TABLE STRING ';'
  75                 {
  76                     table_name = $2;
  77                 }
  78                 | REQUEST STRING ',' STRING ',' aliases ',' '(' flags ')' ';'
  79                 {
  80                     add_command($2, $4, $6, $9);
  81                 }
  82                 | REQUEST STRING ',' STRING ',' aliases ';'
  83                 {
  84                     add_command($2, $4, $6, 0);
  85                 }
  86                 | UNIMPLEMENTED STRING ',' STRING ',' aliases ';'
  87                 {
  88                     free($2);
  89                     free($4);
  90                     free_string_list($6);
  91                 }
  92                 | UNKNOWN aliases ';'
  93                 {
  94                     free_string_list($2);
  95                 }
  96                 | END ';'
  97                 {
  98                     YYACCEPT;
  99                 }
 100                 ;
 101
 102 aliases         : STRING
 103                 {
 104                     $$ = append_string(NULL, $1);
 105                 }
 106                 | aliases ',' STRING
 107                 {
 108                     $$ = append_string($1, $3);
 109                 }
 110                 ;
 111
 112 flags           : flag
 113                 {
 114                     $$ = $1;
 115                 }
 116                 | flags ',' flag
 117                 {
 118                     $$ = $1 | $3;
 119                 }
 120                 ;
 121 flag            : STRING
 122                 {
 123                     $$ = string_to_flag($1);
 124                     free($1);
 125                 }
 126                 ;
 127
 128
 129
 130 %%
 131
 132 static void
 133 yyerror (char *s)
 134 {
 135     error_message ("%s\n", s);
 136 }
 137
 138 struct string_list*
 139 append_string(struct string_list *list, char *str)
 140 {
 141     struct string_list *sl = malloc(sizeof(*sl));
 142     if (sl == NULL)
 143         return sl;
 144     sl->string = str;
 145     sl->next = NULL;
 146     if(list) {
 147         *list->tail = sl;
 148         list->tail = &sl->next;
 149         return list;
 150     }
 151     sl->tail = &sl->next;
 152     return sl;
 153 }
 154
 155 void
 156 free_string_list(struct string_list *list)
 157 {
 158     while(list) {
 159         struct string_list *sl = list->next;
 160         free(list->string);
 161         free(list);
 162         list = sl;
 163     }
 164 }
 165
 166 unsigned
 167 string_to_flag(const char *string)
 168 {
 169     return 0;
 170 }