blobmsg_json.c

   1 /*
   2  * blobmsg - library for generating/parsing structured blob messages
   3  *
   4  * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU Lesser General Public License version 2.1
   8  * as published by the Free Software Foundation
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include "blobmsg.h"
  17 #include "blobmsg_json.h"
  18
  19 static bool blobmsg_add_object(struct blob_buf *b, json_object *obj)
  20 {
  21         json_object_object_foreach(obj, key, val) {
  22                 if (!blobmsg_add_json_element(b, key, val))
  23                         return false;
  24         }
  25         return true;
  26 }
  27
  28 static bool blobmsg_add_array(struct blob_buf *b, struct array_list *a)
  29 {
  30         int i, len;
  31
  32         for (i = 0, len = array_list_length(a); i < len; i++) {
  33                 if (!blobmsg_add_json_element(b, NULL, array_list_get_idx(a, i)))
  34                         return false;
  35         }
  36
  37         return true;
  38 }
  39
  40 bool blobmsg_add_json_element(struct blob_buf *b, const char *name, json_object *obj)
  41 {
  42         bool ret = true;
  43         void *c;
  44
  45         if (!obj)
  46                 return false;
  47
  48         switch (json_object_get_type(obj)) {
  49         case json_type_object:
  50                 c = blobmsg_open_table(b, name);
  51                 ret = blobmsg_add_object(b, obj);
  52                 blobmsg_close_table(b, c);
  53                 break;
  54         case json_type_array:
  55                 c = blobmsg_open_array(b, name);
  56                 ret = blobmsg_add_array(b, json_object_get_array(obj));
  57                 blobmsg_close_array(b, c);
  58                 break;
  59         case json_type_string:
  60                 blobmsg_add_string(b, name, json_object_get_string(obj));
  61                 break;
  62         case json_type_boolean:
  63                 blobmsg_add_u8(b, name, json_object_get_boolean(obj));
  64                 break;
  65         case json_type_int:
  66                 blobmsg_add_u32(b, name, json_object_get_int(obj));
  67                 break;
  68         default:
  69                 return false;
  70         }
  71         return ret;
  72 }
  73
  74 bool blobmsg_add_json_from_string(struct blob_buf *b, const char *str)
  75 {
  76         json_object *obj;
  77         bool ret = false;
  78
  79         obj = json_tokener_parse(str);
  80         if (is_error(obj))
  81                 return false;
  82
  83         if (json_object_get_type(obj) != json_type_object)
  84                 goto out;
  85
  86         ret = blobmsg_add_object(b, obj);
  87
  88 out:
  89         json_object_put(obj);
  90         return ret;
  91 }
  92