apps/netutils/json: Removed. Replaced with apps/netutils/cjson.
This commit is contained in:
Gregory Nutt
parent
24e590b072
commit
bd14bf7165
@ -1,206 +0,0 @@
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/****************************************************************************
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* apps/netutils/json/cJSON.c
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*
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* This file is a part of NuttX:
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Ported by: Darcy Gong
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*
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* And derives from the cJSON Project which has an MIT license:
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*
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* Copyright (c) 2009 Dave Gamble
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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****************************************************************************/
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#ifndef __APPS_INCLUDE_NETUTILS_JSON_H
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#define __APPS_INCLUDE_NETUTILS_JSON_H
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/****************************************************************************
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* Included Files
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****************************************************************************/
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define cJSON_False 0
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#define cJSON_True 1
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#define cJSON_NULL 2
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#define cJSON_Number 3
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#define cJSON_String 4
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#define cJSON_Array 5
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#define cJSON_Object 6
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#define cJSON_IsReference 256
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#define cJSON_AddNullToObject(object,name) \
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cJSON_AddItemToObject(object, name, cJSON_CreateNull())
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#define cJSON_AddTrueToObject(object,name) \
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cJSON_AddItemToObject(object, name, cJSON_CreateTrue())
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#define cJSON_AddFalseToObject(object,name) \
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cJSON_AddItemToObject(object, name, cJSON_CreateFalse())
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#define cJSON_AddNumberToObject(object,name,n) \
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cJSON_AddItemToObject(object, name, cJSON_CreateNumber(n))
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#define cJSON_AddStringToObject(object,name,s) \
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cJSON_AddItemToObject(object, name, cJSON_CreateString(s))
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* The cJSON structure: */
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typedef struct cJSON
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{
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/* next/prev allow you to walk array/object chains. Alternatively, use
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* GetArraySize/GetArrayItem/GetObjectItem
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*/
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struct cJSON *next,*prev;
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/* An array or object item will have a child pointer pointing to a chain
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* of the items in the array/object.
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*/
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struct cJSON *child;
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int type; /* The type of the item, as above. */
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char *valuestring; /* The item's string, if type==cJSON_String */
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int valueint; /* The item's number, if type==cJSON_Number */
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double valuedouble; /* The item's number, if type==cJSON_Number */
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/* The item's name string, if this item is the child of, or is in the list
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* of subitems of an object.
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*/
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char *string;
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} cJSON;
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typedef struct cJSON_Hooks
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{
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void *(*malloc_fn)(size_t sz);
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void (*free_fn)(void *ptr);
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} cJSON_Hooks;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/* Supply malloc, realloc and free functions to cJSON */
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void cJSON_InitHooks(cJSON_Hooks* hooks);
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/* Supply a block of JSON, and this returns a cJSON object you can
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* interrogate. Call cJSON_Delete when finished.
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*/
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cJSON *cJSON_Parse(const char *value);
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/* Render a cJSON entity to text for transfer/storage. Free the char* when
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* finished.
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*/
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char *cJSON_Print(cJSON *item);
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/* Render a cJSON entity to text for transfer/storage without any
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* formatting. Free the char* when finished.
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*/
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char *cJSON_PrintUnformatted(cJSON *item);
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/* Delete a cJSON entity and all subentities. */
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void cJSON_Delete(cJSON *c);
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/* Returns the number of items in an array (or object). */
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int cJSON_GetArraySize(cJSON *array);
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/* Retrieve item number "item" from array "array". Returns NULL if
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* unsuccessful.
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*/
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cJSON *cJSON_GetArrayItem(cJSON *array, int item);
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/* Get item "string" from object. Case insensitive. */
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cJSON *cJSON_GetObjectItem(cJSON *object, const char *string);
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/* For analysing failed parses. This returns a pointer to the parse error.
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* You'll probably need to look a few chars back to make sense of it.
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* Defined when cJSON_Parse() returns 0. 0 when cJSON_Parse() succeeds.
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*/
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const char *cJSON_GetErrorPtr(void);
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/* These calls create a cJSON item of the appropriate type. */
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cJSON *cJSON_CreateNull(void);
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cJSON *cJSON_CreateTrue(void);
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cJSON *cJSON_CreateFalse(void);
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cJSON *cJSON_CreateBool(int b);
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cJSON *cJSON_CreateNumber(double num);
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cJSON *cJSON_CreateString(const char *string);
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cJSON *cJSON_CreateArray(void);
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cJSON *cJSON_CreateObject(void);
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/* These utilities create an Array of count items. */
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cJSON *cJSON_CreateIntArray(const int *numbers, int count);
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cJSON *cJSON_CreateFloatArray(const float *numbers, int count);
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cJSON *cJSON_CreateDoubleArray(const double *numbers, int count);
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cJSON *cJSON_CreateStringArray(const char **strings, int count);
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/* Append item to the specified array/object. */
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void cJSON_AddItemToArray(cJSON *array, cJSON *item);
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void cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item);
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/* Append reference to item to the specified array/object. Use this when you
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* want to add an existing cJSON to a new cJSON, but don't want to corrupt
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* your existing cJSON.
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*/
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void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item);
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void cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item);
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/* Remove/Detatch items from Arrays/Objects. */
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cJSON *cJSON_DetachItemFromArray(cJSON *array, int which);
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void cJSON_DeleteItemFromArray(cJSON *array, int which);
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cJSON *cJSON_DetachItemFromObject(cJSON *object, const char *string);
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void cJSON_DeleteItemFromObject(cJSON *object, const char *string);
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/* Update array items. */
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void cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem);
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void cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __APPS_INCLUDE_NETUTILS_JSON_H */
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7
netutils/json/.gitignore
vendored
7
netutils/json/.gitignore
vendored
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/.built
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/.depend
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/Make.dep
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/cgi-bin
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/*.src
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/*.obj
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/*.lst
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@ -1,18 +0,0 @@
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#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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config NETUTILS_JSON
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bool "cJSON library"
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default n
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---help---
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Enables the cJSON library. cJSON is an ultra-lightweight, portable,
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single-file, simple-as-can-be ANSI-C compliant JSON parser, under MIT
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license. Embeddable Lightweight XML-RPC Server discussed at
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http://www.drdobbs.com/web-development/an-embeddable-lightweight-xml-rpc-server/184405364.
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This code was taken from http://sourceforge.net/projects/cjson/ and
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adapted for NuttX by Darcy Gong.
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if NETUTILS_JSON
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endif
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@ -1,39 +0,0 @@
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# apps/netutils/json/Make.defs
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# Adds selected applications to apps/ build
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#
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# Copyright (C) 2016 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# 3. Neither the name NuttX nor the names of its contributors may be
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# used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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############################################################################
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ifeq ($(CONFIG_NETUTILS_JSON),y)
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CONFIGURED_APPS += netutils/json
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endif
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@ -1,40 +0,0 @@
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############################################################################
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# apps/netutils/json/Makefile
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#
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# Copyright (C) 2012 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# 3. Neither the name NuttX nor the names of its contributors may be
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# used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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############################################################################
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-include $(TOPDIR)/Make.defs
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CSRCS = cJSON.c
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include $(APPDIR)/Application.mk
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@ -1,258 +0,0 @@
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apps/netutils/json/README.txt
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=============================
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This directory contains logic taken from the cJSON project:
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http://sourceforge.net/projects/cjson/
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This corresponds to SVN revision r42 (with lots of changes for NuttX coding
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standards). As of r42, the SVN repository was last updated on 2011-10-10
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so I presume that the code is stable and there is no risk of maintaining
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duplicate logic in the NuttX repository.
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Contents
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========
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o License
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o Welcome to cJSON
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License
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=======
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Copyright (c) 2009 Dave Gamble
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Permission is hereby granted, free of charge, to any person obtaining a copy
|
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of this software and associated documentation files (the "Software"), to deal
|
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in the Software without restriction, including without limitation the rights
|
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
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copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
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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,
|
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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Welcome to cJSON
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================
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cJSON aims to be the dumbest possible parser that you can get your job done with.
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It's a single file of C, and a single header file.
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JSON is described best here: http://www.json.org/
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It's like XML, but fat-free. You use it to move data around, store things, or just
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generally represent your program's state.
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First up, how do I build?
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Add cJSON.c to your project, and put cJSON.h somewhere in the header search path.
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For example, to build the test app:
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gcc cJSON.c test.c -o test -lm
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./test
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As a library, cJSON exists to take away as much legwork as it can, but not get in your way.
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As a point of pragmatism (i.e. ignoring the truth), I'm going to say that you can use it
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in one of two modes: Auto and Manual. Let's have a quick run-through.
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I lifted some JSON from this page: http://www.json.org/fatfree.html
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That page inspired me to write cJSON, which is a parser that tries to share the same
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philosophy as JSON itself. Simple, dumb, out of the way.
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Some JSON:
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{
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"name": "Jack (\"Bee\") Nimble",
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"format": {
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"type": "rect",
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"width": 1920,
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"height": 1080,
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"interlace": false,
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"frame rate": 24
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}
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}
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Assume that you got this from a file, a webserver, or magic JSON elves, whatever,
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you have a char * to it. Everything is a cJSON struct.
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Get it parsed:
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cJSON *root = cJSON_Parse(my_json_string);
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This is an object. We're in C. We don't have objects. But we do have structs.
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What's the framerate?
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cJSON *format = cJSON_GetObjectItem(root,"format");
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int framerate = cJSON_GetObjectItem(format,"frame rate")->valueint;
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Want to change the framerate?
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cJSON_GetObjectItem(format,"frame rate")->valueint=25;
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Back to disk?
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char *rendered=cJSON_Print(root);
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Finished? Delete the root (this takes care of everything else).
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cJSON_Delete(root);
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That's AUTO mode. If you're going to use Auto mode, you really ought to check pointers
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before you dereference them. If you want to see how you'd build this struct in code?
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cJSON *root,*fmt;
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root=cJSON_CreateObject();
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cJSON_AddItemToObject(root, "name", cJSON_CreateString("Jack (\"Bee\") Nimble"));
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cJSON_AddItemToObject(root, "format", fmt=cJSON_CreateObject());
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cJSON_AddStringToObject(fmt,"type", "rect");
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cJSON_AddNumberToObject(fmt,"width", 1920);
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cJSON_AddNumberToObject(fmt,"height", 1080);
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cJSON_AddFalseToObject (fmt,"interlace");
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cJSON_AddNumberToObject(fmt,"frame rate", 24);
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Hopefully we can agree that's not a lot of code? There's no overhead, no unnecessary setup.
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Look at test.c for a bunch of nice examples, mostly all ripped off the json.org site, and
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a few from elsewhere.
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What about manual mode? First up you need some detail.
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Let's cover how the cJSON objects represent the JSON data.
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cJSON doesn't distinguish arrays from objects in handling; just type.
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Each cJSON has, potentially, a child, siblings, value, a name.
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The root object has: Object Type and a Child
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The Child has name "name", with value "Jack ("Bee") Nimble", and a sibling:
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Sibling has type Object, name "format", and a child.
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That child has type String, name "type", value "rect", and a sibling:
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||||
Sibling has type Number, name "width", value 1920, and a sibling:
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||||
Sibling has type Number, name "height", value 1080, and a sibling:
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||||
Sibling hs type False, name "interlace", and a sibling:
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||||
Sibling has type Number, name "frame rate", value 24
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||||
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||||
Here's the structure:
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||||
typedef struct cJSON {
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||||
struct cJSON *next,*prev;
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||||
struct cJSON *child;
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||||
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||||
int type;
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||||
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||||
char *valuestring;
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||||
int valueint;
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||||
double valuedouble;
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||||
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||||
char *string;
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||||
} cJSON;
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||||
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||||
By default all values are 0 unless set by virtue of being meaningful.
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||||
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||||
next/prev is a doubly linked list of siblings. next takes you to your sibling,
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||||
prev takes you back from your sibling to you.
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||||
Only objects and arrays have a "child", and it's the head of the doubly linked list.
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||||
A "child" entry will have prev==0, but next potentially points on. The last sibling has next=0.
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||||
The type expresses Null/True/False/Number/String/Array/Object, all of which are #defined in
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||||
cJSON.h
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||||
|
||||
A Number has valueint and valuedouble. If you're expecting an int, read valueint, if not read
|
||||
valuedouble.
|
||||
|
||||
Any entry which is in the linked list which is the child of an object will have a "string"
|
||||
which is the "name" of the entry. When I said "name" in the above example, that's "string".
|
||||
"string" is the JSON name for the 'variable name' if you will.
|
||||
|
||||
Now you can trivially walk the lists, recursively, and parse as you please.
|
||||
You can invoke cJSON_Parse to get cJSON to parse for you, and then you can take
|
||||
the root object, and traverse the structure (which is, formally, an N-tree),
|
||||
and tokenise as you please. If you wanted to build a callback style parser, this is how
|
||||
you'd do it (just an example, since these things are very specific):
|
||||
|
||||
void parse_and_callback(cJSON *item,const char *prefix)
|
||||
{
|
||||
while (item)
|
||||
{
|
||||
char *newprefix=malloc(strlen(prefix)+strlen(item->name)+2);
|
||||
sprintf(newprefix,"%s/%s",prefix,item->name);
|
||||
int dorecurse=callback(newprefix, item->type, item);
|
||||
if (item->child && dorecurse) parse_and_callback(item->child,newprefix);
|
||||
item=item->next;
|
||||
free(newprefix);
|
||||
}
|
||||
}
|
||||
|
||||
The prefix process will build you a separated list, to simplify your callback handling.
|
||||
The 'dorecurse' flag would let the callback decide to handle sub-arrays on it's own, or
|
||||
let you invoke it per-item. For the item above, your callback might look like this:
|
||||
|
||||
int callback(const char *name,int type,cJSON *item)
|
||||
{
|
||||
if (!strcmp(name,"name")) { /* populate name */ }
|
||||
else if (!strcmp(name,"format/type") { /* handle "rect" */ }
|
||||
else if (!strcmp(name,"format/width") { /* 800 */ }
|
||||
else if (!strcmp(name,"format/height") { /* 600 */ }
|
||||
else if (!strcmp(name,"format/interlace") { /* false */ }
|
||||
else if (!strcmp(name,"format/frame rate") { /* 24 */ }
|
||||
return 1;
|
||||
}
|
||||
|
||||
Alternatively, you might like to parse iteratively.
|
||||
You'd use:
|
||||
|
||||
void parse_object(cJSON *item)
|
||||
{
|
||||
int i; for (i=0;i<cJSON_GetArraySize(item);i++)
|
||||
{
|
||||
cJSON *subitem=cJSON_GetArrayItem(item,i);
|
||||
// handle subitem.
|
||||
}
|
||||
}
|
||||
|
||||
Or, for PROPER manual mode:
|
||||
|
||||
void parse_object(cJSON *item)
|
||||
{
|
||||
cJSON *subitem=item->child;
|
||||
while (subitem)
|
||||
{
|
||||
// handle subitem
|
||||
if (subitem->child) parse_object(subitem->child);
|
||||
|
||||
subitem=subitem->next;
|
||||
}
|
||||
}
|
||||
|
||||
Of course, this should look familiar, since this is just a stripped-down version
|
||||
of the callback-parser.
|
||||
|
||||
This should cover most uses you'll find for parsing. The rest should be possible
|
||||
to infer.. and if in doubt, read the source! There's not a lot of it! ;)
|
||||
|
||||
In terms of constructing JSON data, the example code above is the right way to do it.
|
||||
You can, of course, hand your sub-objects to other functions to populate.
|
||||
Also, if you find a use for it, you can manually build the objects.
|
||||
For instance, suppose you wanted to build an array of objects?
|
||||
|
||||
cJSON *objects[24];
|
||||
|
||||
cJSON *Create_array_of_anything(cJSON **items,int num)
|
||||
{
|
||||
int i;cJSON *prev, *root=cJSON_CreateArray();
|
||||
for (i=0;i<24;i++)
|
||||
{
|
||||
if (!i) root->child=objects[i];
|
||||
else prev->next=objects[i], objects[i]->prev=prev;
|
||||
prev=objects[i];
|
||||
}
|
||||
return root;
|
||||
}
|
||||
|
||||
and simply: Create_array_of_anything(objects,24);
|
||||
|
||||
cJSON doesn't make any assumptions about what order you create things in.
|
||||
You can attach the objects, as above, and later add children to each
|
||||
of those objects.
|
||||
|
||||
As soon as you call cJSON_Print, it renders the structure to text.
|
||||
|
||||
The test.c code shows how to handle a bunch of typical cases. If you uncomment
|
||||
the code, it'll load, parse and print a bunch of test files, also from json.org,
|
||||
which are more complex than I'd care to try and stash into a const char array[].
|
||||
|
||||
Enjoy cJSON!
|
||||
|
||||
- Dave Gamble, Aug 2009
|
||||
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Reference in New Issue
Block a user