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120 lines
4.4 KiB
C
120 lines
4.4 KiB
C
/* Copyright (C) 2018 MariaDB Corporation
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA */
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#ifndef MYSQL_SERVICE_JSON
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#define MYSQL_SERVICE_JSON
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/**
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@file
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json service
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Exports JSON parsing methods for plugins to use.
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Functions of the service:
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json_type - returns the type of the JSON argument,
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and the parsed value if it's scalar (not object or array)
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json_get_array_item - expects JSON array as an argument,
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and returns the type of the element at index `n_item`.
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Returns JSV_NOTHING type if the array is shorter
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than n_item and the actual length of the array in value_len.
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If successful, then `value` up till `value[value_len]` contains the array
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element at the desired index (n_item).
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json_get_object_key - expects JSON object as an argument,
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searches for a key in the object, return it's type and stores its value in `value`.
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JSV_NOTHING if no such key found, the number of keys
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in v_len.
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json_get_object_nkey - expects JSON object as an argument.
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finds n_key's key in the object, returns it's name, type and value.
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JSV_NOTHING if object has less keys than n_key.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum json_types
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{
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JSV_BAD_JSON=-1,
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JSV_NOTHING=0,
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JSV_OBJECT=1,
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JSV_ARRAY=2,
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JSV_STRING=3,
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JSV_NUMBER=4,
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JSV_TRUE=5,
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JSV_FALSE=6,
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JSV_NULL=7
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};
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extern struct json_service_st {
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enum json_types (*json_type)(const char *js, const char *js_end,
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const char **value, int *value_len);
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enum json_types (*json_get_array_item)(const char *js, const char *js_end,
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int n_item,
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const char **value, int *value_len);
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enum json_types (*json_get_object_key)(const char *js, const char *js_end,
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const char *key,
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const char **value, int *value_len);
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enum json_types (*json_get_object_nkey)(const char *js,const char *js_end,
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int nkey,
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const char **keyname, const char **keyname_end,
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const char **value, int *value_len);
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int (*json_escape_string)(const char *str,const char *str_end,
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char *json, char *json_end);
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int (*json_unescape_json)(const char *json_str, const char *json_end,
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char *res, char *res_end);
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} *json_service;
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#ifdef MYSQL_DYNAMIC_PLUGIN
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#define json_type json_service->json_type
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#define json_get_array_item json_service->json_get_array_item
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#define json_get_object_key json_service->json_get_object_key
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#define json_get_object_nkey json_service->json_get_object_nkey
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#define json_escape_string json_service->json_escape_string
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#define json_unescape_json json_service->json_unescape_json
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#else
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enum json_types json_type(const char *js, const char *js_end,
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const char **value, int *value_len);
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enum json_types json_get_array_item(const char *js, const char *js_end,
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int n_item,
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const char **value, int *value_len);
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enum json_types json_get_object_key(const char *js, const char *js_end,
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const char *key,
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const char **value, int *value_len);
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enum json_types json_get_object_nkey(const char *js,const char *js_end, int nkey,
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const char **keyname, const char **keyname_end,
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const char **value, int *value_len);
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int json_escape_string(const char *str,const char *str_end,
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char *json, char *json_end);
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int json_unescape_json(const char *json_str, const char *json_end,
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char *res, char *res_end);
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#endif /*MYSQL_DYNAMIC_PLUGIN*/
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#ifdef __cplusplus
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}
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#endif
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#endif /*MYSQL_SERVICE_JSON */
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