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/*
* Copyright (c) 2017 by Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Internet Systems Consortium, Inc.
* PO Box 360
* Newmarket, NH 03857 USA
* <info@isc.org>
* https://www.isc.org/
*
*/
/* From Kea src/lib/cc/data.cc fromJSON() */
#include "keama.h"
#include <stdlib.h>
#include <string.h>
struct element *
json_parse(struct parse *cfile)
{
struct element *elem;
const char *val;
enum dhcp_token token;
elem = create();
stackPush(cfile, elem);
cfile->stack[0] = elem;
cfile->stack_top = 0;
token = next_token(&val, NULL, cfile);
switch (token) {
case NUMBER:
elem = createInt(atoll(val));
TAILQ_CONCAT(&elem->comments, &cfile->comments);
break;
case STRING:
elem = createString(makeString(-1, val));
TAILQ_CONCAT(&elem->comments, &cfile->comments);
break;
case NAME:
if (strcmp(val, "null") == 0)
elem = createNull();
else if (strcmp(val, "true") == 0)
elem = createBool(ISC_TRUE);
else if (strcmp(val, "false") == 0) {
elem = createBool(ISC_FALSE);
elem->skip = ISC_TRUE;
} else
parse_error(cfile, "unknown name %s", val);
TAILQ_CONCAT(&elem->comments, &cfile->comments);
break;
case LBRACKET:
elem = json_list_parse(cfile);
break;
case LBRACE:
elem = json_map_parse(cfile);
break;
case END_OF_FILE:
parse_error(cfile, "unexpected end of file");
default:
parse_error(cfile, "unexpected %s", val);
}
return elem;
}
struct element *
json_list_parse(struct parse *cfile)
{
struct element *list;
struct element *item;
const char *val;
enum dhcp_token token;
isc_boolean_t done = ISC_FALSE;
list = createList();
TAILQ_CONCAT(&list->comments, &cfile->comments);
stackPush(cfile, list);
do {
token = peek_token(&val, NULL, cfile);
switch (token) {
case RBRACKET:
done = ISC_TRUE;
break;
case END_OF_FILE:
parse_error(cfile, "unexpected end of file");
case COMMA:
skip_token(&val, NULL, cfile);
if (listSize(list) == 0)
parse_error(cfile, "unexpected ','");
item = json_parse(cfile);
listPush(list, item);
break;
default:
if (listSize(list) > 0)
parse_error(cfile, "expected ','");
item = json_parse(cfile);
listPush(list, item);
break;
}
} while (!done);
skip_token(&val, NULL, cfile);
cfile->stack_top--;
return list;
}
struct element *
json_map_parse(struct parse *cfile)
{
struct element *map;
struct element *item;
const char *val;
const char *key;
enum dhcp_token token;
isc_boolean_t done = ISC_FALSE;
map = createMap();
TAILQ_CONCAT(&map->comments, &cfile->comments);
stackPush(cfile, map);
do {
token = peek_token(&val, NULL, cfile);
switch (token) {
case RBRACE:
done = ISC_TRUE;
break;
case END_OF_FILE:
parse_error(cfile, "unexpected end of file");
case COMMA:
skip_token(&val, NULL, cfile);
if (mapSize(map) == 0)
parse_error(cfile, "unexpected ','");
token = next_token(&val, NULL, cfile);
if (token != STRING)
parse_error(cfile, "unexpected %s, "
"expected \"key\":value", val);
key = strdup(val);
token = next_token(&val, NULL, cfile);
if (token != COLON)
parse_error(cfile, "unexpected %s, "
"expected ':'", val);
item = json_parse(cfile);
mapSet(map, item, key);
break;
case STRING:
skip_token(&val, NULL, cfile);
if (mapSize(map) > 0)
parse_error(cfile, "unexpected \"%s\", "
"expected ','", val);
key = strdup(val);
token = next_token(&val, NULL, cfile);
if (token != COLON)
parse_error(cfile, "unexpected %s, "
"expected ':'", val);
item = json_parse(cfile);
mapSet(map, item, key);
break;
default:
if (mapSize(map) == 0)
parse_error(cfile, "unexpected %s, "
"expected \"key\":value or '}'",
val);
else
parse_error(cfile, "unexpected %s, "
"expected ',' or '}'", val);
}
} while (!done);
skip_token(&val, NULL, cfile);
cfile->stack_top--;
return map;
}
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