Add port of cJSON from Darcy Gong

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5267 42af7a65-404d-4744-a932-0658087f49c3

apps/include/netutils/cJSON.h

@@ -0,0 +1,206 @@
+/****************************************************************************
+ * apps/netutils/json/cJSON.c
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 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.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_INCLUDE_NETUTILS_JSON_H
+#define __APPS_INCLUDE_NETUTILS_JSON_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define cJSON_False  0
+#define cJSON_True   1
+#define cJSON_NULL   2
+#define cJSON_Number 3
+#define cJSON_String 4
+#define cJSON_Array  5
+#define cJSON_Object 6
+  
+#define cJSON_IsReference 256
+
+#define cJSON_AddNullToObject(object,name) \
+  cJSON_AddItemToObject(object, name, cJSON_CreateNull())
+#define cJSON_AddTrueToObject(object,name) \
+  cJSON_AddItemToObject(object, name, cJSON_CreateTrue())cd 
+#define cJSON_AddFalseToObject(object,name) \
+  cJSON_AddItemToObject(object, name, cJSON_CreateFalse())
+#define cJSON_AddNumberToObject(object,name,n) \
+  cJSON_AddItemToObject(object, name, cJSON_CreateNumber(n))
+#define cJSON_AddStringToObject(object,name,s) \
+  cJSON_AddItemToObject(object, name, cJSON_CreateString(s))
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/* The cJSON structure: */
+
+typedef struct cJSON
+{
+  /* next/prev allow you to walk array/object chains. Alternatively, use
+   * GetArraySize/GetArrayItem/GetObjectItem
+   */
+
+  struct cJSON *next,*prev;  
+
+  /* An array or object item will have a child pointer pointing to a chain
+   * of the items in the array/object.
+   */
+
+  struct cJSON *child;    
+
+  int type;               /* The type of the item, as above. */
+  char *valuestring;      /* The item's string, if type==cJSON_String */
+  int valueint;           /* The item's number, if type==cJSON_Number */
+  double valuedouble;     /* The item's number, if type==cJSON_Number */
+
+  /* The item's name string, if this item is the child of, or is in the list
+   * of subitems of an object.
+   */
+
+  char *string;
+} cJSON;
+
+typedef struct cJSON_Hooks
+{
+  void *(*malloc_fn)(size_t sz);
+  void (*free_fn)(void *ptr);
+} cJSON_Hooks;
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/* Supply malloc, realloc and free functions to cJSON */
+
+void cJSON_InitHooks(cJSON_Hooks* hooks);
+
+/* Supply a block of JSON, and this returns a cJSON object you can
+ * interrogate. Call cJSON_Delete when finished.
+ */
+
+cJSON *cJSON_Parse(const char *value);
+
+/* Render a cJSON entity to text for transfer/storage. Free the char* when
+ * finished.
+ */
+
+char *cJSON_Print(cJSON *item);
+
+/* Render a cJSON entity to text for transfer/storage without any
+ * formatting. Free the char* when finished.
+ */
+
+char *cJSON_PrintUnformatted(cJSON *item);
+
+/* Delete a cJSON entity and all subentities. */
+
+void cJSON_Delete(cJSON *c);
+
+/* Returns the number of items in an array (or object). */
+
+int cJSON_GetArraySize(cJSON *array);
+
+/* Retrieve item number "item" from array "array". Returns NULL if
+ * unsuccessful.
+ */
+
+cJSON *cJSON_GetArrayItem(cJSON *array, int item);
+
+/* Get item "string" from object. Case insensitive. */
+
+cJSON *cJSON_GetObjectItem(cJSON *object, const char *string);
+
+/* For analysing failed parses. This returns a pointer to the parse error.
+ * You'll probably need to look a few chars back to make sense of it.
+ * Defined when cJSON_Parse() returns 0. 0 when cJSON_Parse() succeeds.
+ */
+
+const char *cJSON_GetErrorPtr();
+  
+/* These calls create a cJSON item of the appropriate type. */
+
+cJSON *cJSON_CreateNull();
+cJSON *cJSON_CreateTrue();
+cJSON *cJSON_CreateFalse();
+cJSON *cJSON_CreateBool(int b);
+cJSON *cJSON_CreateNumber(double num);
+cJSON *cJSON_CreateString(const char *string);
+cJSON *cJSON_CreateArray();
+cJSON *cJSON_CreateObject();
+
+/* These utilities create an Array of count items. */
+
+cJSON *cJSON_CreateIntArray(const int *numbers, int count);
+cJSON *cJSON_CreateFloatArray(const float *numbers, int count);
+cJSON *cJSON_CreateDoubleArray(const double *numbers, int count);
+cJSON *cJSON_CreateStringArray(const char **strings, int count);
+
+/* Append item to the specified array/object. */
+
+void cJSON_AddItemToArray(cJSON *array, cJSON *item);
+void cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item);
+
+/* Append reference to item to the specified array/object. Use this when you
+ * want to add an existing cJSON to a new cJSON, but don't want to corrupt
+ * your existing cJSON.
+ */
+
+void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item);
+void cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item);
+
+/* Remove/Detatch items from Arrays/Objects. */
+
+cJSON *cJSON_DetachItemFromArray(cJSON *array, int which);
+void cJSON_DeleteItemFromArray(cJSON *array, int which);
+cJSON *cJSON_DetachItemFromObject(cJSON *object, const char *string);
+void cJSON_DeleteItemFromObject(cJSON *object, const char *string);
+  
+/* Update array items. */
+
+void cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem);
+void cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __APPS_INCLUDE_NETUTILS_JSON_H */