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/*
* $Id$
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2018 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
%{
#include <Dk.h>
#include "sqlparext.h"
#include "sqlfn.h"
#define jsonyyerror(str) jsonyyerror_impl(str)
void jsonyyerror_impl(const char *s);
int jsonyy_string_input (char *buf, int max);
caddr_t *json_tree;
caddr_t json_str;
int jsonyydebug;
int jsonyylex (void);
int json_line;
%}
%union {
caddr_t box;
caddr_t *list;
dk_set_t set;
}
%token OBJ_BEGIN
%token OBJ_END
%token ARR_BEGIN
%token ARR_END
%token COLON
%token COMMA
%token <box> STRING
%token <box> NUMBER
%token <box> TRUE_L
%token <box> FALSE_L
%token <box> NULL_L
%type <box> object
%type <list> jsondoc
%type <set> members
%type <set> members_opt
%type <set> pair
%type <box> value
%type <box> array
%type <set> value_list
%type <set> value_list_opt
%%
jsondoc
: object { json_tree = (caddr_t *) $1; }
| array { json_tree = (caddr_t *) $1; }
;
object : OBJ_BEGIN members_opt OBJ_END {
$$ = (caddr_t)t_list_to_array (
t_NCONC (
/* header */
t_CONS(t_alloc_box (0, DV_COMPOSITE),
t_CONS (t_box_string ("structure"), NULL))
,
$2
)
);
}
;
members_opt
: /* empty */ { $$ = NULL; }
| members
;
members : pair { $$ = $1; }
| members COMMA pair { $$ = t_NCONC ($1, $3); }
| members COMMA error { jsonyyerror ("pair of field name and value is expected after ','"); }
;
pair
: STRING COLON value {
dk_set_t set = NULL;
t_set_push (&set, $3);
t_set_push (&set, $1);
$$ = set; }
| STRING COLON error { jsonyyerror ("value is expected after ':'"); }
| STRING error { jsonyyerror ("colon is expected after field name"); }
;
array
: ARR_BEGIN value_list_opt ARR_END { $$ = (caddr_t)t_list_to_array ($2);}
;
value_list_opt
: /* empty */ { $$ = NULL; }
| value_list
;
value_list
: value { $$ = t_CONS ($1, NULL); }
| value_list COMMA value { $$ = t_NCONC ($1, t_CONS($3, NULL)); }
| value_list COMMA error { jsonyyerror ("array member is expected after ','"); }
;
value : STRING { $$ = $1; }
| NUMBER { $$ = $1; }
| TRUE_L { $$ = t_box_num (1); }
| FALSE_L { $$ = t_box_num (0); }
| NULL_L { $$ = t_alloc_box (0, DV_DB_NULL); }
| object { $$ = $1; }
| array { $$ = $1; }
;
%%
#define YY_INPUT(buf, res, max) \
res = jsonyy_string_input (buf, max);
void
jsonyyerror_impl(const char *s)
{
sqlr_new_error ("37000", "JSON1", "JSON parser failed: %.200s at line %d", s, json_line);
}
int
jsonyywrap (void)
{
return 1;
}
int jsonyy_string_input (char *buf, int max)
{
int len = (int) strlen (json_str);
if (len == 0)
return 0;
if (len > max)
len = max;
memcpy (buf, json_str, len);
json_str += len;
return len;
}
void jsonyy_string_input_init (char * str)
{
json_str = str;
}
|
