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/*
* $Id$
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2012 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 revlist;
}
%token JSON_OBJ_BEGIN
%token JSON_OBJ_END
%token JSON_ARR_BEGIN
%token JSON_ARR_END
%token JSON_COLON
%token JSON_COMMA
%token <box> JSON_NAME
%token <box> JSON_SQSTRING
%token <box> JSON_DQSTRING
%token <box> JSON_NUMBER
%token <box> JSON_TRUE_L
%token <box> JSON_FALSE_L
%token <box> JSON_NULL_L
%type <box> object
%type <box> jsondoc
%type <revlist> members
%type <box> name_or_str
%type <box> value
%type <box> array
%type <revlist> value_list
%%
jsondoc
: object { json_tree = (caddr_t *) $1; }
| array { json_tree = (caddr_t *) $1; }
;
object
: JSON_OBJ_BEGIN JSON_OBJ_END { $$ = (caddr_t)t_list (2, t_alloc_box (0, DV_COMPOSITE), t_box_string ("structure")); }
| JSON_OBJ_BEGIN members JSON_OBJ_END { $$ = (caddr_t)t_revlist_to_array ($2); }
;
members
: name_or_str JSON_COLON value {
dk_set_t res = NULL;
t_set_push (&res, t_alloc_box (0, DV_COMPOSITE));
t_set_push (&res, t_box_string ("structure"));
t_set_push (&res, $1);
t_set_push (&res, $3);
$$ = res; }
| members JSON_COMMA name_or_str JSON_COLON value {
$$ = $1; t_set_push (&($$), $3); t_set_push (&($$), $5); }
| members JSON_COMMA error { jsonyyerror ("pair of field name and value is expected after ','"); }
;
name_or_str
: JSON_NAME
| JSON_SQSTRING
| JSON_DQSTRING
;
array
: JSON_ARR_BEGIN JSON_ARR_END { $$ = (caddr_t)t_alloc_list (0);}
| JSON_ARR_BEGIN value_list JSON_ARR_END { $$ = (caddr_t)t_revlist_to_array ($2);}
;
value_list
: value { $$ = NULL; t_set_push (&($$), $1); }
| value_list JSON_COMMA value { $$ = $1; t_set_push (&($$), $3); }
| value_list JSON_COMMA error { jsonyyerror ("array member is expected after ','"); }
;
value
: JSON_NAME { jsonyyerror ("name without quotes is misused as a value"); }
| JSON_SQSTRING { $$ = $1; }
| JSON_DQSTRING { $$ = $1; }
| JSON_NUMBER { $$ = $1; }
| JSON_TRUE_L { $$ = t_box_num (1); }
| JSON_FALSE_L { $$ = t_box_num (0); }
| JSON_NULL_L { $$ = 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;
}
|
