/****************************************************************************
* apps/examples/json/json_main.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Ported by: Darcy Gong
*
* And derives from the cJSON Project which has an MIT license:
*
* Copyright (c) 2009 Dave Gamble
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <apps/netutils/cJSON.h>
/****************************************************************************
* Private Types
****************************************************************************/
/* Used by some code below as an example datatype. */
struct record
{
const char *precision;
double lat;
double lon;
const char *address;
const char *city;
const char *state;
const char *zip;
const char *country;
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: doit
*
* Description:
* Parse text to JSON, then render back to text, and print!
*
****************************************************************************/
static void doit(const char *text)
{
char *out;
cJSON *json;
json = cJSON_Parse(text);
if (!json)
{
printf("Error before: [%s]\n", cJSON_GetErrorPtr());
}
else
{
out = cJSON_Print(json);
cJSON_Delete(json);
printf("%s\n", out);
free(out);
}
}
/****************************************************************************
* Name: dofile
*
* Description:
* Read a file, parse, render back, etc.
*
****************************************************************************/
#if 0 /* Not used */
static void dofile(char *filename)
{
FILE *f = fopen(filename, "rb");
fseek(f, 0, SEEK_END);
long len = ftell(f);
fseek(f, 0, SEEK_SET);
char *data = malloc(len + 1);
fread(data, 1, len, f);
fclose(f);
doit(data);
free(data);
}
#endif
/****************************************************************************
* Name: create_objects
*
* Description:
* Create a bunch of objects as demonstration.
*
****************************************************************************/
static void create_objects(void)
{
cJSON *root;
cJSON *fmt;
cJSON *img;
cJSON *thm;
cJSON *fld;
char *out;
int i;
/* Our "days of the week" array */
static const char *strings[7] =
{
"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"
};
/* Our matrix: */
static const int numbers[3][3] = { {0, -1, 0}, {1, 0, 0}, {0, 0, 1} };
/* Our "gallery" item: */
static const int ids[4] = { 116, 943, 234, 38793 };
/* Our array of "records": */
static const struct record fields[2] =
{
{"zip", 37.7668, -1.223959e+2, "", "SAN FRANCISCO", "CA", "94107", "US"},
{"zip", 37.371991, -1.22026e+2, "", "SUNNYVALE", "CA", "94085", "US"}
};
/* Here we construct some JSON standards, from the JSON site. */
/* Our "Video" datatype: */
root = cJSON_CreateObject();
cJSON_AddItemToObject(root, "name", cJSON_CreateString("Jack (\"Bee\") Nimble"));
cJSON_AddItemToObject(root, "format", fmt = cJSON_CreateObject());
cJSON_AddStringToObject(fmt, "type", "rect");
cJSON_AddNumberToObject(fmt, "width", 1920);
cJSON_AddNumberToObject(fmt, "height", 1080);
cJSON_AddFalseToObject(fmt, "interlace");
cJSON_AddNumberToObject(fmt, "frame rate", 24);
out = cJSON_Print(root);
cJSON_Delete(root);
printf("%s\n", out);
free(out);
/* Print to text, Delete the cJSON, print it, release the string. */
root = cJSON_CreateStringArray(strings, 7);
out = cJSON_Print(root);
cJSON_Delete(root);
printf("%s\n", out);
free(out);
root = cJSON_CreateArray();
for (i = 0; i < 3; i++)
{
cJSON_AddItemToArray(root, cJSON_CreateIntArray(numbers[i], 3));
}
/*cJSON_ReplaceItemInArray(root,1,cJSON_CreateString("Replacement")); */
out = cJSON_Print(root);
cJSON_Delete(root);
printf("%s\n", out);
free(out);
root = cJSON_CreateObject();
cJSON_AddItemToObject(root, "Image", img = cJSON_CreateObject());
cJSON_AddNumberToObject(img, "Width", 800);
cJSON_AddNumberToObject(img, "Height", 600);
cJSON_AddStringToObject(img, "Title", "View from 15th Floor");
cJSON_AddItemToObject(img, "Thumbnail", thm = cJSON_CreateObject());
cJSON_AddStringToObject(thm, "Url", "http:/*www.example.com/image/481989943");
cJSON_AddNumberToObject(thm, "Height", 125);
cJSON_AddStringToObject(thm, "Width", "100");
cJSON_AddItemToObject(img, "IDs", cJSON_CreateIntArray(ids, 4));
out = cJSON_Print(root);
cJSON_Delete(root);
printf("%s\n", out);
free(out);
root = cJSON_CreateArray();
for (i = 0; i < 2; i++)
{
cJSON_AddItemToArray(root, fld = cJSON_CreateObject());
cJSON_AddStringToObject(fld, "precision", fields[i].precision);
cJSON_AddNumberToObject(fld, "Latitude", fields[i].lat);
cJSON_AddNumberToObject(fld, "Longitude", fields[i].lon);
cJSON_AddStringToObject(fld, "Address", fields[i].address);
cJSON_AddStringToObject(fld, "City", fields[i].city);
cJSON_AddStringToObject(fld, "State", fields[i].state);
cJSON_AddStringToObject(fld, "Zip", fields[i].zip);
cJSON_AddStringToObject(fld, "Country", fields[i].country);
}
/*cJSON_ReplaceItemInObject(cJSON_GetArrayItem(root,1),"City",cJSON_CreateIntArray(ids,4)); */
out = cJSON_Print(root);
cJSON_Delete(root);
printf("%s\n", out);
free(out);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name:
*
* Description:
*
*
****************************************************************************/
int json_main(int argc, const char *argv[])
{
/* a bunch of json: */
static const char text1[] =
"{\n"
" \"name\": \"Jack (\\\"Bee\\\") Nimble\",\n"
" \"format\": {\n"
" \"type\": \"rect\",\n"
" \"width\": 1920,\n"
" \"height\": 1080,\n"
" \"interlace\": false,\n"
" \"frame rate\": 24\n"
" }\n"
"}";
static const char text2[] =
"[\"Sunday\", \"Monday\", \"Tuesday\", \"Wednesday\", \"Thursday\", \"Friday\", \"Saturday\"]";
static const char text3[] =
"[\n"
" [0, -1, 0],\n"
" [1, 0, 0],\n"
" [0, 0, 1]\n"
"]\n";
static const char text4[] =
"{\n"
" \"Image\": {\n"
" \"Width\": 800,\n"
" \"Height\": 600,\n"
" \"Title\": \"View from 15th Floor\",\n"
" \"Thumbnail\": {\n"
" \"Url\": \"http:/*www.example.com/image/481989943\",\n"
" \"Height\": 125,\n"
" \"Width\": \"100\"\n"
" },\n"
" \"IDs\": [116, 943, 234, 38793]\n"
" }\n"
"}";
static const char text5[] =
"[\n"
" {\n"
" \"precision\": \"zip\",\n"
" \"Latitude\": 37.7668,\n"
" \"Longitude\": -122.3959,\n"
" \"Address\": \"\",\n"
" \"City\": \"SAN FRANCISCO\",\n"
" \"State\": \"CA\",\n"
" \"Zip\": \"94107\",\n"
" \"Country\": \"US\"\n"
" },\n"
" {\n"
" \"precision\": \"zip\",\n"
" \"Latitude\": 37.371991,\n"
" \"Longitude\": -122.026020,\n"
" \"Address\": \"\",\n"
" \"City\": \"SUNNYVALE\",\n"
" \"State\": \"CA\",\n"
" \"Zip\": \"94085\",\n"
" \"Country\": \"US\"\n"
" }\n"
"]";
/* Process each json textblock by parsing, then rebuilding: */ doit(text1);
doit(text2);
doit(text3);
doit(text4);
doit(text5);
/* Parse standard testfiles: */
#if 0 /* Not yet */
dofile("../../tests/test1");
dofile("../../tests/test2");
dofile("../../tests/test3");
dofile("../../tests/test4");
dofile("../../tests/test5");
#endif
/* Now some samplecode for building objects concisely: */
create_objects();
return 0;
}
