external/bsd/am-utils/dist/amd/conf_parse.y

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1997-2009 Erez Zadok
   5  * Copyright (c) 1989 Jan-Simon Pendry
   6  * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
   7  * Copyright (c) 1989 The Regents of the University of California.
   8  * All rights reserved.
   9  *
  10  * This code is derived from software contributed to Berkeley by
  11  * Jan-Simon Pendry at Imperial College, London.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgment:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  *
  41  *
  42  * File: am-utils/amd/conf_parse.y
  43  *
  44  */
  45
  46 %{
  47 #ifdef HAVE_CONFIG_H
  48 # include <config.h>
  49 #endif /* HAVE_CONFIG_H */
  50 #include <am_defs.h>
  51 #include <amd.h>
  52
  53 extern char *yytext;
  54 extern int ayylineno;
  55 extern int yylex(void);
  56
  57 static int yyerror(const char *s);
  58 static int retval;
  59 static char *header_section = NULL; /* start with no header section */
  60
  61 #define YYDEBUG 1
  62
  63 #define PARSE_DEBUG 0
  64
  65 #if PARSE_DEBUG
  66 # define dprintf(f,s) fprintf(stderr, (f), ayylineno, (s))
  67 # define amu_return(v)
  68 #else /* not PARSE_DEBUG */
  69 # define dprintf(f,s)
  70 # define amu_return(v) return((v))
  71 #endif /* not PARSE_DEBUG */
  72
  73 %}
  74
  75 %union {
  76 char *strtype;
  77 }
  78
  79 %token LEFT_BRACKET RIGHT_BRACKET EQUAL
  80 %token NEWLINE
  81 %token <strtype> NONWS_STRING
  82 %token <strtype> NONWSEQ_STRING
  83 %token <strtype> QUOTED_NONWSEQ_STRING
  84
  85 %start file
  86 %%
  87
  88 /****************************************************************************/
  89 file            : { yydebug = PARSE_DEBUG; } newlines map_sections
  90                 | { yydebug = PARSE_DEBUG; } map_sections
  91                 ;
  92
  93 newlines        : NEWLINE
  94                 | NEWLINE newlines
  95                 ;
  96
  97 map_sections    : map_section
  98                 | map_section map_sections
  99                 ;
 100
 101 map_section     : sec_header kv_pairs
 102                 ;
 103
 104 sec_header      : LEFT_BRACKET NONWS_STRING RIGHT_BRACKET NEWLINE
 105                 {
 106                   if (yydebug)
 107                     fprintf(stderr, "sec_header1 = \"%s\"\n", $2);
 108                   header_section = $2;
 109                 }
 110                 ;
 111
 112 kv_pairs        : kv_pair
 113                 | kv_pair kv_pairs
 114                 ;
 115
 116 kv_pair         : NONWS_STRING EQUAL NONWS_STRING NEWLINE
 117                 {
 118                   if (yydebug)
 119                     fprintf(stderr,"parse1: key=\"%s\", val=\"%s\"\n", $1, $3);
 120                   retval = set_conf_kv(header_section, $1, $3);
 121                   if (retval != 0) {
 122                     yyerror("syntax error");
 123                     YYABORT;
 124                   }
 125                 }
 126                 | NONWS_STRING EQUAL NONWSEQ_STRING NEWLINE
 127                 {
 128                   if (yydebug)
 129                     fprintf(stderr,"parse2: key=\"%s\", val=\"%s\"\n", $1, $3);
 130                   retval = set_conf_kv(header_section, $1, $3);
 131                   if (retval != 0) {
 132                     yyerror("syntax error");
 133                     YYABORT;
 134                   }
 135                 }
 136                 | NONWS_STRING EQUAL QUOTED_NONWSEQ_STRING NEWLINE
 137                 {
 138                   if (yydebug)
 139                     fprintf(stderr,"parse3: key=\"%s\", val=\"%s\"\n", $1, $3);
 140                   retval = set_conf_kv(header_section, $1, $3);
 141                   if (retval != 0) {
 142                     yyerror("syntax error");
 143                     YYABORT;
 144                   }
 145                 }
 146                 | NEWLINE
 147                 ;
 148
 149 /****************************************************************************/
 150 %%
 151
 152 static int
 153 yyerror(const char *s)
 154 {
 155   fprintf(stderr, "AMDCONF: %s on line %d (section %s)\n",
 156           s, ayylineno,
 157           (header_section ? header_section : "null"));
 158   exit(1);
 159   return 1;     /* to full compilers that insist on a return statement */
 160 }