cjson源码

雨点打透心脏的1/2处 2023-06-16 07:54 48阅读 0赞

/* 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. */
    
    /* cJSON */
    /* JSON parser in C. */
    //#include "StdAfx.h"
    #include <string.h>
    #include <stdio.h>
    #include <math.h>
    #include <stdlib.h>
    #include <float.h>
    #include <limits.h>
    #include <ctype.h>
    #include "cJSON.h"
    
    static const char *ep;
    const char *cJSON_GetErrorPtr(void) { return ep;}
    static int cJSON_strcasecmp(const char *s1,const char *s2)
    { 
    	if (!s1) return (s1==s2)?0:1;if (!s2) return 1;
    	for(; tolower(*s1) == tolower(*s2); ++s1, ++s2)	if(*s1 == 0)	return 0;
    	return tolower(*(const unsigned char *)s1) - tolower(*(const unsigned char *)s2);
    }
    
    static void *(*cJSON_malloc)(size_t sz) = malloc;
    static void (*cJSON_free)(void *ptr) = free;
    
    static char* cJSON_strdup(const char* str)
    { 
          size_t len;
          char* copy;
    
          len = strlen(str) + 1;
          if (!(copy = (char*)cJSON_malloc(len))) return 0;
          memcpy(copy,str,len);
          return copy;
    }
    
    void cJSON_InitHooks(cJSON_Hooks* hooks)
    { 
        if (!hooks) {  /* Reset hooks */
            cJSON_malloc = malloc;
            cJSON_free = free;
            return;
        }
    
    	cJSON_malloc = (hooks->malloc_fn)?hooks->malloc_fn:malloc;
    	cJSON_free	 = (hooks->free_fn)?hooks->free_fn:free;
    }
    
    /* Internal constructor. */
    static cJSON *cJSON_New_Item(void)
    { 
    	cJSON* node = (cJSON*)cJSON_malloc(sizeof(cJSON));
    	if (node) memset(node,0,sizeof(cJSON));
    	return node;
    }
    
    /* Delete a cJSON structure. */
    void cJSON_Delete(cJSON *c)
    { 
    	cJSON *next;
    	while (c)
    	{ 
    		next=c->next;
    		if (!(c->type&cJSON_IsReference) && c->child) cJSON_Delete(c->child);
    		if (!(c->type&cJSON_IsReference) && c->valuestring) cJSON_free(c->valuestring);
    		if (!(c->type&cJSON_StringIsConst) && c->string) cJSON_free(c->string);
    		cJSON_free(c);
    		c=next;
    	}
    }
    
    /* Parse the input text to generate a number, and populate the result into item. */
    static const char *parse_number(cJSON *item,const char *num)
    { 
    	double n=0,sign=1,scale=0;int subscale=0,signsubscale=1;
    
    	if (*num=='-') sign=-1,num++;	/* Has sign? */
    	if (*num=='0') num++;			/* is zero */
    	if (*num>='1' && *num<='9')	do	n=(n*10.0)+(*num++ -'0');	while (*num>='0' && *num<='9');	/* Number? */
    	if (*num=='.' && num[1]>='0' && num[1]<='9') { num++;		do	n=(n*10.0)+(*num++ -'0'),scale--; while (*num>='0' && *num<='9');}	/* Fractional part? */
    	if (*num=='e' || *num=='E')		/* Exponent? */
    	{ 	num++;if (*num=='+') num++;	else if (*num=='-') signsubscale=-1,num++;		/* With sign? */
    		while (*num>='0' && *num<='9') subscale=(subscale*10)+(*num++ - '0');	/* Number? */
    	}
    
    	n=sign*n*pow(10.0,(scale+subscale*signsubscale));	/* number = +/- number.fraction * 10^+/- exponent */
    	
    	item->valuedouble=n;
    	item->valueint=(int)n;
    	item->type=cJSON_Number;
    	return num;
    }
    
    static int pow2gt (int x)	{ 	--x;	x|=x>>1;	x|=x>>2;	x|=x>>4;	x|=x>>8;	x|=x>>16;	return x+1;	}
    
    typedef struct { char *buffer; int length; int offset; } printbuffer;
    
    static char* ensure(printbuffer *p,int needed)
    { 
    	char *newbuffer;int newsize;
    	if (!p || !p->buffer) return 0;
    	needed+=p->offset;
    	if (needed<=p->length) return p->buffer+p->offset;
    
    	newsize=pow2gt(needed);
    	newbuffer=(char*)cJSON_malloc(newsize);
    	if (!newbuffer) { cJSON_free(p->buffer);p->length=0,p->buffer=0;return 0;}
    	if (newbuffer) memcpy(newbuffer,p->buffer,p->length);
    	cJSON_free(p->buffer);
    	p->length=newsize;
    	p->buffer=newbuffer;
    	return newbuffer+p->offset;
    }
    
    static int update(printbuffer *p)
    { 
    	char *str;
    	if (!p || !p->buffer) return 0;
    	str=p->buffer+p->offset;
    	return p->offset+strlen(str);
    }
    
    /* Render the number nicely from the given item into a string. */
    static char *print_number(cJSON *item,printbuffer *p)
    { 
    	char *str=0;
    	double d=item->valuedouble;
    	if (d==0)
    	{ 
    		if (p)	str=ensure(p,2);
    		else	str=(char*)cJSON_malloc(2);	/* special case for 0. */
    		if (str) strcpy(str,"0");
    	}
    	else if (fabs(((double)item->valueint)-d)<=DBL_EPSILON && d<=INT_MAX && d>=INT_MIN)
    	{ 
    		if (p)	str=ensure(p,21);
    		else	str=(char*)cJSON_malloc(21);	/* 2^64+1 can be represented in 21 chars. */
    		if (str)	sprintf(str,"%d",item->valueint);
    	}
    	else
    	{ 
    		if (p)	str=ensure(p,64);
    		else	str=(char*)cJSON_malloc(64);	/* This is a nice tradeoff. */
    		if (str)
    		{ 
    			if (fabs(floor(d)-d)<=DBL_EPSILON && fabs(d)<1.0e60)sprintf(str,"%.0f",d);
    			else if (fabs(d)<1.0e-6 || fabs(d)>1.0e9)			sprintf(str,"%e",d);
    			else												sprintf(str,"%f",d);
    		}
    	}
    	return str;
    }
    
    static unsigned parse_hex4(const char *str)
    { 
    	unsigned h=0;
    	if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
    	h=h<<4;str++;
    	if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
    	h=h<<4;str++;
    	if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
    	h=h<<4;str++;
    	if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
    	return h;
    }
    
    /* Parse the input text into an unescaped cstring, and populate item. */
    static const unsigned char firstByteMark[7] = {  0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
    static const char *parse_string(cJSON *item,const char *str)
    { 
    	const char *ptr=str+1;char *ptr2;char *out;int len=0;unsigned uc,uc2;
    	if (*str!='\"') { ep=str;return 0;}	/* not a string! */
    	
    	while (*ptr!='\"' && *ptr && ++len) if (*ptr++ == '\\') ptr++;	/* Skip escaped quotes. */
    	
    	out=(char*)cJSON_malloc(len+1);	/* This is how long we need for the string, roughly. */
    	if (!out) return 0;
    	
    	ptr=str+1;ptr2=out;
    	while (*ptr!='\"' && *ptr)
    	{ 
    		if (*ptr!='\\') *ptr2++=*ptr++;
    		else
    		{ 
    			ptr++;
    			switch (*ptr)
    			{ 
    				case 'b': *ptr2++='\b';	break;
    				case 'f': *ptr2++='\f';	break;
    				case 'n': *ptr2++='\n';	break;
    				case 'r': *ptr2++='\r';	break;
    				case 't': *ptr2++='\t';	break;
    				case 'u':	 /* transcode utf16 to utf8. */
    					uc=parse_hex4(ptr+1);ptr+=4;	/* get the unicode char. */
    
    					if ((uc>=0xDC00 && uc<=0xDFFF) || uc==0)	break;	/* check for invalid. */
    
    					if (uc>=0xD800 && uc<=0xDBFF)	/* UTF16 surrogate pairs. */
    					{ 
    						if (ptr[1]!='\\' || ptr[2]!='u')	break;	/* missing second-half of surrogate. */
    						uc2=parse_hex4(ptr+3);ptr+=6;
    						if (uc2<0xDC00 || uc2>0xDFFF)		break;	/* invalid second-half of surrogate. */
    						uc=0x10000 + (((uc&0x3FF)<<10) | (uc2&0x3FF));
    					}
    
    					len=4;if (uc<0x80) len=1;else if (uc<0x800) len=2;else if (uc<0x10000) len=3; ptr2+=len;
    					
    					switch (len) { 
    						case 4: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
    						case 3: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
    						case 2: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
    						case 1: *--ptr2 =(uc | firstByteMark[len]);
    					}
    					ptr2+=len;
    					break;
    				default:  *ptr2++=*ptr; break;
    			}
    			ptr++;
    		}
    	}
    	*ptr2=0;
    	if (*ptr=='\"') ptr++;
    	item->valuestring=out;
    	item->type=cJSON_String;
    	return ptr;
    }
    
    /* Render the cstring provided to an escaped version that can be printed. */
    static char *print_string_ptr(const char *str,printbuffer *p)
    { 
    	const char *ptr;char *ptr2,*out;int len=0,flag=0;unsigned char token;
    	
    	for (ptr=str;*ptr;ptr++) flag|=((*ptr>0 && *ptr<32)||(*ptr=='\"')||(*ptr=='\\'))?1:0;
    	if (!flag)
    	{ 
    		len=ptr-str;
    		if (p) out=ensure(p,len+3);
    		else		out=(char*)cJSON_malloc(len+3);
    		if (!out) return 0;
    		ptr2=out;*ptr2++='\"';
    		strcpy(ptr2,str);
    		ptr2[len]='\"';
    		ptr2[len+1]=0;
    		return out;
    	}
    	
    	if (!str)
    	{ 
    		if (p)	out=ensure(p,3);
    		else	out=(char*)cJSON_malloc(3);
    		if (!out) return 0;
    		strcpy(out,"\"\"");
    		return out;
    	}
    	ptr=str;while ((token=*ptr) && ++len) { if (strchr("\"\\\b\f\n\r\t",token)) len++; else if (token<32) len+=5;ptr++;}
    	
    	if (p)	out=ensure(p,len+3);
    	else	out=(char*)cJSON_malloc(len+3);
    	if (!out) return 0;
    
    	ptr2=out;ptr=str;
    	*ptr2++='\"';
    	while (*ptr)
    	{ 
    		if ((unsigned char)*ptr>31 && *ptr!='\"' && *ptr!='\\') *ptr2++=*ptr++;
    		else
    		{ 
    			*ptr2++='\\';
    			switch (token=*ptr++)
    			{ 
    				case '\\':	*ptr2++='\\';	break;
    				case '\"':	*ptr2++='\"';	break;
    				case '\b':	*ptr2++='b';	break;
    				case '\f':	*ptr2++='f';	break;
    				case '\n':	*ptr2++='n';	break;
    				case '\r':	*ptr2++='r';	break;
    				case '\t':	*ptr2++='t';	break;
    				default: sprintf(ptr2,"u%04x",token);ptr2+=5;	break;	/* escape and print */
    			}
    		}
    	}
    	*ptr2++='\"';*ptr2++=0;
    	return out;
    }
    /* Invote print_string_ptr (which is useful) on an item. */
    static char *print_string(cJSON *item,printbuffer *p)	{ return print_string_ptr(item->valuestring,p);}
    
    /* Predeclare these prototypes. */
    static const char *parse_value(cJSON *item,const char *value);
    static char *print_value(cJSON *item,int depth,int fmt,printbuffer *p);
    static const char *parse_array(cJSON *item,const char *value);
    static char *print_array(cJSON *item,int depth,int fmt,printbuffer *p);
    static const char *parse_object(cJSON *item,const char *value);
    static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p);
    
    /* Utility to jump whitespace and cr/lf */
    static const char *skip(const char *in) { while (in && *in && (unsigned char)*in<=32) in++; return in;}
    
    /* Parse an object - create a new root, and populate. */
    cJSON *cJSON_ParseWithOpts(const char *value,const char **return_parse_end,int require_null_terminated)
    { 
    	const char *end=0;
    	cJSON *c=cJSON_New_Item();
    	ep=0;
    	if (!c) return 0;       /* memory fail */
    
    	end=parse_value(c,skip(value));
    	if (!end)	{ cJSON_Delete(c);return 0;}	/* parse failure. ep is set. */
    
    	/* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
    	if (require_null_terminated) { end=skip(end);if (*end) { cJSON_Delete(c);ep=end;return 0;}}
    	if (return_parse_end) *return_parse_end=end;
    	return c;
    }
    /* Default options for cJSON_Parse */
    cJSON *cJSON_Parse(const char *value) { return cJSON_ParseWithOpts(value,0,0);}
    
    /* Render a cJSON item/entity/structure to text. */
    char *cJSON_Print(cJSON *item)				{ return print_value(item,0,1,0);}
    
    /**********************************************************************************************//** * @fn char *cJSON_PrintUnformatted(cJSON *item) * * @brief JSON print unformatted. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * * @return Null if it fails, else a pointer to a char. **************************************************************************************************/
    
    char *cJSON_PrintUnformatted(cJSON *item)	{ return print_value(item,0,0,0);}
    
    /**********************************************************************************************//** * @fn char *cJSON_PrintBuffered(cJSON *item,int prebuffer,int fmt) * * @brief JSON print buffered. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * @param prebuffer The prebuffer. * @param fmt Describes the format to use. * * @return Null if it fails, else a pointer to a char. **************************************************************************************************/
    
    char *cJSON_PrintBuffered(cJSON *item,int prebuffer,int fmt)
    { 
    	printbuffer p;
    	p.buffer=(char*)cJSON_malloc(prebuffer);
    	p.length=prebuffer;
    	p.offset=0;
    	return print_value(item,0,fmt,&p);
    	return p.buffer;
    }
    
    
    /* Parser core - when encountering text, process appropriately. */
    
    /**********************************************************************************************//** * @fn static const char *parse_value(cJSON *item,const char *value) * * @brief Parse value. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * @param value The value. * * @return Null if it fails, else a pointer to a const char. **************************************************************************************************/
    
    static const char *parse_value(cJSON *item,const char *value)
    { 
    	if (!value)						return 0;	/* Fail on null. */
    	if (!strncmp(value,"null",4))	{  item->type=cJSON_NULL;  return value+4; }
    	if (!strncmp(value,"false",5))	{  item->type=cJSON_False; return value+5; }
    	if (!strncmp(value,"true",4))	{  item->type=cJSON_True; item->valueint=1;	return value+4; }
    	if (*value=='\"')				{  return parse_string(item,value); }
    	if (*value=='-' || (*value>='0' && *value<='9'))	{  return parse_number(item,value); }
    	if (*value=='[')				{  return parse_array(item,value); }
    	if (*value=='{')				{  return parse_object(item,value); }
    
    	ep=value;return 0;	/* failure. */
    }
    
    /* Render a value to text. */
    
    /**********************************************************************************************//** * @fn static char *print_value(cJSON *item,int depth,int fmt,printbuffer *p) * * @brief Print value. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * @param depth The depth. * @param fmt Describes the format to use. * @param [in,out] p If non-null, the printbuffer to process. * * @return Null if it fails, else a pointer to a char. **************************************************************************************************/
    
    static char *print_value(cJSON *item,int depth,int fmt,printbuffer *p)
    { 
    	char *out=0;
    	if (!item) return 0;
    	if (p)
    	{ 
    		switch ((item->type)&255)
    		{ 
    			case cJSON_NULL:	{ out=ensure(p,5);	if (out) strcpy(out,"null");	break;}
    			case cJSON_False:	{ out=ensure(p,6);	if (out) strcpy(out,"false");	break;}
    			case cJSON_True:	{ out=ensure(p,5);	if (out) strcpy(out,"true");	break;}
    			case cJSON_Number:	out=print_number(item,p);break;
    			case cJSON_String:	out=print_string(item,p);break;
    			case cJSON_Array:	out=print_array(item,depth,fmt,p);break;
    			case cJSON_Object:	out=print_object(item,depth,fmt,p);break;
    		}
    	}
    	else
    	{ 
    		switch ((item->type)&255)
    		{ 
    			case cJSON_NULL:	out=cJSON_strdup("null");	break;
    			case cJSON_False:	out=cJSON_strdup("false");break;
    			case cJSON_True:	out=cJSON_strdup("true"); break;
    			case cJSON_Number:	out=print_number(item,0);break;
    			case cJSON_String:	out=print_string(item,0);break;
    			case cJSON_Array:	out=print_array(item,depth,fmt,0);break;
    			case cJSON_Object:	out=print_object(item,depth,fmt,0);break;
    		}
    	}
    	return out;
    }
    
    /* Build an array from input text. */
    
    /**********************************************************************************************//** * @fn static const char *parse_array(cJSON *item,const char *value) * * @brief Parse array. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * @param value The value. * * @return Null if it fails, else a pointer to a const char. **************************************************************************************************/
    
    static const char *parse_array(cJSON *item,const char *value)
    { 
    	cJSON *child;
    	if (*value!='[')	{ ep=value;return 0;}	/* not an array! */
    
    	item->type=cJSON_Array;
    	value=skip(value+1);
    	if (*value==']') return value+1;	/* empty array. */
    
    	item->child=child=cJSON_New_Item();
    	if (!item->child) return 0;		 /* memory fail */
    	value=skip(parse_value(child,skip(value)));	/* skip any spacing, get the value. */
    	if (!value) return 0;
    
    	while (*value==',')
    	{ 
    		cJSON *new_item;
    		if (!(new_item=cJSON_New_Item())) return 0; 	/* memory fail */
    		child->next=new_item;new_item->prev=child;child=new_item;
    		value=skip(parse_value(child,skip(value+1)));
    		if (!value) return 0;	/* memory fail */
    	}
    
    	if (*value==']') return value+1;	/* end of array */
    	ep=value;return 0;	/* malformed. */
    }
    
    /* Render an array to text */
    
    /**********************************************************************************************//** * @fn static char *print_array(cJSON *item,int depth,int fmt,printbuffer *p) * * @brief Print array. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * @param depth The depth. * @param fmt Describes the format to use. * @param [in,out] p If non-null, the printbuffer to process. * * @return Null if it fails, else a pointer to a char. **************************************************************************************************/
    
    static char *print_array(cJSON *item,int depth,int fmt,printbuffer *p)
    { 
    	char **entries;
    	char *out=0,*ptr,*ret;int len=5;
    	cJSON *child=item->child;
    	int numentries=0,i=0,fail=0;
    	size_t tmplen=0;
    	
    	/* How many entries in the array? */
    	while (child) numentries++,child=child->next;
    	/* Explicitly handle numentries==0 */
    	if (!numentries)
    	{ 
    		if (p)	out=ensure(p,3);
    		else	out=(char*)cJSON_malloc(3);
    		if (out) strcpy(out,"[]");
    		return out;
    	}
    
    	if (p)
    	{ 
    		/* Compose the output array. */
    		i=p->offset;
    		ptr=ensure(p,1);if (!ptr) return 0;	*ptr='[';	p->offset++;
    		child=item->child;
    		while (child && !fail)
    		{ 
    			print_value(child,depth+1,fmt,p);
    			p->offset=update(p);
    			if (child->next) { len=fmt?2:1;ptr=ensure(p,len+1);if (!ptr) return 0;*ptr++=',';if(fmt)*ptr++=' ';*ptr=0;p->offset+=len;}
    			child=child->next;
    		}
    		ptr=ensure(p,2);if (!ptr) return 0;	*ptr++=']';*ptr=0;
    		out=(p->buffer)+i;
    	}
    	else
    	{ 
    		/* Allocate an array to hold the values for each */
    		entries=(char**)cJSON_malloc(numentries*sizeof(char*));
    		if (!entries) return 0;
    		memset(entries,0,numentries*sizeof(char*));
    		/* Retrieve all the results: */
    		child=item->child;
    		while (child && !fail)
    		{ 
    			ret=print_value(child,depth+1,fmt,0);
    			entries[i++]=ret;
    			if (ret) len+=strlen(ret)+2+(fmt?1:0); else fail=1;
    			child=child->next;
    		}
    		
    		/* If we didn't fail, try to malloc the output string */
    		if (!fail)	out=(char*)cJSON_malloc(len);
    		/* If that fails, we fail. */
    		if (!out) fail=1;
    
    		/* Handle failure. */
    		if (fail)
    		{ 
    			for (i=0;i<numentries;i++) if (entries[i]) cJSON_free(entries[i]);
    			cJSON_free(entries);
    			return 0;
    		}
    		
    		/* Compose the output array. */
    		*out='[';
    		ptr=out+1;*ptr=0;
    		for (i=0;i<numentries;i++)
    		{ 
    			tmplen=strlen(entries[i]);memcpy(ptr,entries[i],tmplen);ptr+=tmplen;
    			if (i!=numentries-1) { *ptr++=',';if(fmt)*ptr++=' ';*ptr=0;}
    			cJSON_free(entries[i]);
    		}
    		cJSON_free(entries);
    		*ptr++=']';*ptr++=0;
    	}
    	return out;	
    }
    
    /* Build an object from the text. */
    
    /**********************************************************************************************//** * @fn static const char *parse_object(cJSON *item,const char *value) * * @brief Parse object. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * @param value The value. * * @return Null if it fails, else a pointer to a const char. **************************************************************************************************/
    
    static const char *parse_object(cJSON *item,const char *value)
    { 
    	cJSON *child;
    	if (*value!='{')	{ ep=value;return 0;}	/* not an object! */
    	
    	item->type=cJSON_Object;
    	value=skip(value+1);
    	if (*value=='}') return value+1;	/* empty array. */
    	
    	item->child=child=cJSON_New_Item();
    	if (!item->child) return 0;
    	value=skip(parse_string(child,skip(value)));
    	if (!value) return 0;
    	child->string=child->valuestring;child->valuestring=0;
    	if (*value!=':') { ep=value;return 0;}	/* fail! */
    	value=skip(parse_value(child,skip(value+1)));	/* skip any spacing, get the value. */
    	if (!value) return 0;
    	
    	while (*value==',')
    	{ 
    		cJSON *new_item;
    		if (!(new_item=cJSON_New_Item()))	return 0; /* memory fail */
    		child->next=new_item;new_item->prev=child;child=new_item;
    		value=skip(parse_string(child,skip(value+1)));
    		if (!value) return 0;
    		child->string=child->valuestring;child->valuestring=0;
    		if (*value!=':') { ep=value;return 0;}	/* fail! */
    		value=skip(parse_value(child,skip(value+1)));	/* skip any spacing, get the value. */
    		if (!value) return 0;
    	}
    	
    	if (*value=='}') return value+1;	/* end of array */
    	ep=value;return 0;	/* malformed. */
    }
    
    /* Render an object to text. */
    
    /**********************************************************************************************//** * @fn static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p) * * @brief Print object. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * @param depth The depth. * @param fmt Describes the format to use. * @param [in,out] p If non-null, the printbuffer to process. * * @return Null if it fails, else a pointer to a char. **************************************************************************************************/
    
    static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p)
    { 
    	char **entries=0,**names=0;
    	char *out=0,*ptr,*ret,*str;int len=7,i=0,j;
    	cJSON *child=item->child;
    	int numentries=0,fail=0;
    	size_t tmplen=0;
    	/* Count the number of entries. */
    	while (child) numentries++,child=child->next;
    	/* Explicitly handle empty object case */
    	if (!numentries)
    	{ 
    		if (p) out=ensure(p,fmt?depth+4:3);
    		else	out=(char*)cJSON_malloc(fmt?depth+4:3);
    		if (!out)	return 0;
    		ptr=out;*ptr++='{';
    		if (fmt) { *ptr++='\n';for (i=0;i<depth-1;i++) *ptr++='\t';}
    		*ptr++='}';*ptr++=0;
    		return out;
    	}
    	if (p)
    	{ 
    		/* Compose the output: */
    		i=p->offset;
    		len=fmt?2:1;	ptr=ensure(p,len+1);	if (!ptr) return 0;
    		*ptr++='{';	if (fmt) *ptr++='\n';	*ptr=0;	p->offset+=len;
    		child=item->child;depth++;
    		while (child)
    		{ 
    			if (fmt)
    			{ 
    				ptr=ensure(p,depth);	if (!ptr) return 0;
    				for (j=0;j<depth;j++) *ptr++='\t';
    				p->offset+=depth;
    			}
    			print_string_ptr(child->string,p);
    			p->offset=update(p);
    			
    			len=fmt?2:1;
    			ptr=ensure(p,len);	if (!ptr) return 0;
    			*ptr++=':';if (fmt) *ptr++='\t';
    			p->offset+=len;
    			
    			print_value(child,depth,fmt,p);
    			p->offset=update(p);
    
    			len=(fmt?1:0)+(child->next?1:0);
    			ptr=ensure(p,len+1); if (!ptr) return 0;
    			if (child->next) *ptr++=',';
    			if (fmt) *ptr++='\n';*ptr=0;
    			p->offset+=len;
    			child=child->next;
    		}
    		ptr=ensure(p,fmt?(depth+1):2);	 if (!ptr) return 0;
    		if (fmt)	for (i=0;i<depth-1;i++) *ptr++='\t';
    		*ptr++='}';*ptr=0;
    		out=(p->buffer)+i;
    	}
    	else
    	{ 
    		/* Allocate space for the names and the objects */
    		entries=(char**)cJSON_malloc(numentries*sizeof(char*));
    		if (!entries) return 0;
    		names=(char**)cJSON_malloc(numentries*sizeof(char*));
    		if (!names) { cJSON_free(entries);return 0;}
    		memset(entries,0,sizeof(char*)*numentries);
    		memset(names,0,sizeof(char*)*numentries);
    
    		/* Collect all the results into our arrays: */
    		child=item->child;depth++;if (fmt) len+=depth;
    		while (child)
    		{ 
    			names[i]=str=print_string_ptr(child->string,0);
    			entries[i++]=ret=print_value(child,depth,fmt,0);
    			if (str && ret) len+=strlen(ret)+strlen(str)+2+(fmt?2+depth:0); else fail=1;
    			child=child->next;
    		}
    		
    		/* Try to allocate the output string */
    		if (!fail)	out=(char*)cJSON_malloc(len);
    		if (!out) fail=1;
    
    		/* Handle failure */
    		if (fail)
    		{ 
    			for (i=0;i<numentries;i++) { if (names[i]) cJSON_free(names[i]);if (entries[i]) cJSON_free(entries[i]);}
    			cJSON_free(names);cJSON_free(entries);
    			return 0;
    		}
    		
    		/* Compose the output: */
    		*out='{';ptr=out+1;if (fmt)*ptr++='\n';*ptr=0;
    		for (i=0;i<numentries;i++)
    		{ 
    			if (fmt) for (j=0;j<depth;j++) *ptr++='\t';
    			tmplen=strlen(names[i]);memcpy(ptr,names[i],tmplen);ptr+=tmplen;
    			*ptr++=':';if (fmt) *ptr++='\t';
    			strcpy(ptr,entries[i]);ptr+=strlen(entries[i]);
    			if (i!=numentries-1) *ptr++=',';
    			if (fmt) *ptr++='\n';*ptr=0;
    			cJSON_free(names[i]);cJSON_free(entries[i]);
    		}
    		
    		cJSON_free(names);cJSON_free(entries);
    		if (fmt) for (i=0;i<depth-1;i++) *ptr++='\t';
    		*ptr++='}';*ptr++=0;
    	}
    	return out;	
    }
    
    /* Get Array size/item / object item. */
    
    /**********************************************************************************************//** * @fn int cJSON_GetArraySize(cJSON *array) * * @brief JSON get array size. * * @author Administrator * @date 2017-01-17 * * @param [in,out] array If non-null, the array. * * @return An int. **************************************************************************************************/
    
    int    cJSON_GetArraySize(cJSON *array)							{ cJSON *c=array->child;int i=0;while(c)i++,c=c->next;return i;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_GetArrayItem(cJSON *array,int item) * * @brief JSON get array item. * * @author Administrator * @date 2017-01-17 * * @param [in,out] array If non-null, the array. * @param item The item. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_GetArrayItem(cJSON *array,int item)				{ cJSON *c=array->child;  while (c && item>0) item--,c=c->next; return c;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_GetObjectItem(cJSON *object,const char *string) * * @brief JSON get object item. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_GetObjectItem(cJSON *object,const char *string)	{ cJSON *c=object->child;while (c && cJSON_strcasecmp(c->string,string)) c=c->next;return c;}
    
    /* Utility for array list handling. */
    
    /**********************************************************************************************//** * @fn static void suffix_object(cJSON *prev,cJSON *item) * * @brief Suffix object. * * @author Administrator * @date 2017-01-17 * * @param [in,out] prev If non-null, the previous. * @param [in,out] item If non-null, the item. **************************************************************************************************/
    
    static void suffix_object(cJSON *prev,cJSON *item) { prev->next=item;item->prev=prev;}
    /* Utility for handling references. */
    
    /**********************************************************************************************//** * @fn static cJSON *create_reference(cJSON *item) * * @brief Creates a reference. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * * @return Null if it fails, else the new reference. **************************************************************************************************/
    
    static cJSON *create_reference(cJSON *item) { cJSON *ref=cJSON_New_Item();if (!ref) return 0;memcpy(ref,item,sizeof(cJSON));ref->string=0;ref->type|=cJSON_IsReference;ref->next=ref->prev=0;return ref;}
    
    /* Add item to array/object. */
    
    /**********************************************************************************************//** * @fn void cJSON_AddItemToArray(cJSON *array, cJSON *item) * * @brief JSON add item to array. * * @author Administrator * @date 2017-01-17 * * @param [in,out] array If non-null, the array. * @param [in,out] item If non-null, the item. **************************************************************************************************/
    
    void   cJSON_AddItemToArray(cJSON *array, cJSON *item)						{ cJSON *c=array->child;if (!item) return; if (!c) { array->child=item;} else { while (c && c->next) c=c->next; suffix_object(c,item);}}
    
    /**********************************************************************************************//** * @fn void cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item) * * @brief JSON add item to object. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. * @param [in,out] item If non-null, the item. **************************************************************************************************/
    
    void   cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item)	{ if (!item) return; if (item->string) cJSON_free(item->string);item->string=cJSON_strdup(string);cJSON_AddItemToArray(object,item);}
    
    /**********************************************************************************************//** * @fn void cJSON_AddItemToObjectCS(cJSON *object,const char *string,cJSON *item) * * @brief JSON add item to object create struct. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. * @param [in,out] item If non-null, the item. **************************************************************************************************/
    
    void   cJSON_AddItemToObjectCS(cJSON *object,const char *string,cJSON *item)	{ if (!item) return; if (!(item->type&cJSON_StringIsConst) && item->string) cJSON_free(item->string);item->string=(char*)string;item->type|=cJSON_StringIsConst;cJSON_AddItemToArray(object,item);}
    
    /**********************************************************************************************//** * @fn void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item) * * @brief JSON add item reference to array. * * @author Administrator * @date 2017-01-17 * * @param [in,out] array If non-null, the array. * @param [in,out] item If non-null, the item. **************************************************************************************************/
    
    void	cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item)						{ cJSON_AddItemToArray(array,create_reference(item));}
    
    /**********************************************************************************************//** * @fn void cJSON_AddItemReferenceToObject(cJSON *object,const char *string,cJSON *item) * * @brief JSON add item reference to object. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. * @param [in,out] item If non-null, the item. **************************************************************************************************/
    
    void	cJSON_AddItemReferenceToObject(cJSON *object,const char *string,cJSON *item)	{ cJSON_AddItemToObject(object,string,create_reference(item));}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_DetachItemFromArray(cJSON *array,int which) * * @brief JSON detach item from array. * * @author Administrator * @date 2017-01-17 * * @param [in,out] array If non-null, the array. * @param which The which. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_DetachItemFromArray(cJSON *array,int which)			{ cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) return 0;
    	if (c->prev) c->prev->next=c->next;if (c->next) c->next->prev=c->prev;if (c==array->child) array->child=c->next;c->prev=c->next=0;return c;}
    
    /**********************************************************************************************//** * @fn void cJSON_DeleteItemFromArray(cJSON *array,int which) * * @brief JSON delete item from array. * * @author Administrator * @date 2017-01-17 * * @param [in,out] array If non-null, the array. * @param which The which. **************************************************************************************************/
    
    void   cJSON_DeleteItemFromArray(cJSON *array,int which)			{ cJSON_Delete(cJSON_DetachItemFromArray(array,which));}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_DetachItemFromObject(cJSON *object,const char *string) * * @brief JSON detach item from object. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_DetachItemFromObject(cJSON *object,const char *string) { int i=0;cJSON *c=object->child;while (c && cJSON_strcasecmp(c->string,string)) i++,c=c->next;if (c) return cJSON_DetachItemFromArray(object,i);return 0;}
    
    /**********************************************************************************************//** * @fn void cJSON_DeleteItemFromObject(cJSON *object,const char *string) * * @brief JSON delete item from object. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. **************************************************************************************************/
    
    void   cJSON_DeleteItemFromObject(cJSON *object,const char *string) { cJSON_Delete(cJSON_DetachItemFromObject(object,string));}
    
    /* Replace array/object items with new ones. */
    
    /**********************************************************************************************//** * @fn void cJSON_InsertItemInArray(cJSON *array,int which,cJSON *newitem) * * @brief JSON insert item in array. * * @author Administrator * @date 2017-01-17 * * @param [in,out] array If non-null, the array. * @param which The which. * @param [in,out] newitem If non-null, the newitem. **************************************************************************************************/
    
    void   cJSON_InsertItemInArray(cJSON *array,int which,cJSON *newitem)		{ cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) { cJSON_AddItemToArray(array,newitem);return;}
    	newitem->next=c;newitem->prev=c->prev;c->prev=newitem;if (c==array->child) array->child=newitem; else newitem->prev->next=newitem;}
    
    /**********************************************************************************************//** * @fn void cJSON_ReplaceItemInArray(cJSON *array,int which,cJSON *newitem) * * @brief JSON replace item in array. * * @author Administrator * @date 2017-01-17 * * @param [in,out] array If non-null, the array. * @param which The which. * @param [in,out] newitem If non-null, the newitem. **************************************************************************************************/
    
    void   cJSON_ReplaceItemInArray(cJSON *array,int which,cJSON *newitem)		{ cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) return;
    	newitem->next=c->next;newitem->prev=c->prev;if (newitem->next) newitem->next->prev=newitem;
    	if (c==array->child) array->child=newitem; else newitem->prev->next=newitem;c->next=c->prev=0;cJSON_Delete(c);}
    
    /**********************************************************************************************//** * @fn void cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem) * * @brief JSON replace item in object. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. * @param [in,out] newitem If non-null, the newitem. **************************************************************************************************/
    
    void   cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem){ int i=0;cJSON *c=object->child;while(c && cJSON_strcasecmp(c->string,string))i++,c=c->next;if(c){ newitem->string=cJSON_strdup(string);cJSON_ReplaceItemInArray(object,i,newitem);}}
    
    /* Create basic types: */
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateNull(void) * * @brief JSON create null. * * @author Administrator * @date 2017-01-17 * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateNull(void)					{ cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_NULL;return item;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateTrue(void) * * @brief JSON create true. * * @author Administrator * @date 2017-01-17 * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateTrue(void)					{ cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_True;return item;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateFalse(void) * * @brief JSON create false. * * @author Administrator * @date 2017-01-17 * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateFalse(void)					{ cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_False;return item;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateBool(int b) * * @brief JSON create bool. * * @author Administrator * @date 2017-01-17 * * @param b The int to process. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateBool(int b)					{ cJSON *item=cJSON_New_Item();if(item)item->type=b?cJSON_True:cJSON_False;return item;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateNumber(double num) * * @brief JSON create number. * * @author Administrator * @date 2017-01-17 * * @param num Number of. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateNumber(double num)			{ cJSON *item=cJSON_New_Item();if(item){ item->type=cJSON_Number;item->valuedouble=num;item->valueint=(int)num;}return item;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateString(const char *string) * * @brief JSON create string. * * @author Administrator * @date 2017-01-17 * * @param string The string. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateString(const char *string)	{ cJSON *item=cJSON_New_Item();if(item){ item->type=cJSON_String;item->valuestring=cJSON_strdup(string);}return item;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateArray(void) * * @brief JSON create array. * * @author Administrator * @date 2017-01-17 * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateArray(void)					{ cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Array;return item;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateObject(void) * * @brief JSON create object. * * @author Administrator * @date 2017-01-17 * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateObject(void)					{ cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Object;return item;}
    
    /* Create Arrays: */
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateIntArray(const int *numbers,int count) * * @brief JSON create int array. * * @author Administrator * @date 2017-01-17 * * @param numbers The numbers. * @param count Number of. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateIntArray(const int *numbers,int count)		{ int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){ n=cJSON_CreateNumber(numbers[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateFloatArray(const float *numbers,int count) * * @brief JSON create float array. * * @author Administrator * @date 2017-01-17 * * @param numbers The numbers. * @param count Number of. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateFloatArray(const float *numbers,int count)	{ int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){ n=cJSON_CreateNumber(numbers[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateDoubleArray(const double *numbers,int count) * * @brief JSON create double array. * * @author Administrator * @date 2017-01-17 * * @param numbers The numbers. * @param count Number of. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateDoubleArray(const double *numbers,int count)	{ int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){ n=cJSON_CreateNumber(numbers[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_CreateStringArray(const char **strings,int count) * * @brief JSON create string array. * * @author Administrator * @date 2017-01-17 * * @param strings The strings. * @param count Number of. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_CreateStringArray(const char **strings,int count)	{ int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){ n=cJSON_CreateString(strings[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
    
    /* Duplication */
    
    /**********************************************************************************************//** * @fn cJSON *cJSON_Duplicate(cJSON *item,int recurse) * * @brief JSON duplicate. * * @author Administrator * @date 2017-01-17 * * @param [in,out] item If non-null, the item. * @param recurse The recurse. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
    cJSON *cJSON_Duplicate(cJSON *item,int recurse)
    { 
    	cJSON *newitem,*cptr,*nptr=0,*newchild;
    	/* Bail on bad ptr */
    	if (!item) return 0;
    	/* Create new item */
    	newitem=cJSON_New_Item();
    	if (!newitem) return 0;
    	/* Copy over all vars */
    	newitem->type=item->type&(~cJSON_IsReference),newitem->valueint=item->valueint,newitem->valuedouble=item->valuedouble;
    	if (item->valuestring)	{ newitem->valuestring=cJSON_strdup(item->valuestring);	if (!newitem->valuestring)	{ cJSON_Delete(newitem);return 0;}}
    	if (item->string)		{ newitem->string=cJSON_strdup(item->string);			if (!newitem->string)		{ cJSON_Delete(newitem);return 0;}}
    	/* If non-recursive, then we're done! */
    	if (!recurse) return newitem;
    	/* Walk the ->next chain for the child. */
    	cptr=item->child;
    	while (cptr)
    	{ 
    		newchild=cJSON_Duplicate(cptr,1);		/* Duplicate (with recurse) each item in the ->next chain */
    		if (!newchild) { cJSON_Delete(newitem);return 0;}
    		if (nptr)	{ nptr->next=newchild,newchild->prev=nptr;nptr=newchild;}	/* If newitem->child already set, then crosswire ->prev and ->next and move on */
    		else		{ newitem->child=newchild;nptr=newchild;}					/* Set newitem->child and move to it */
    		cptr=cptr->next;
    	}
    	return newitem;
    }
    
    /**********************************************************************************************//** * @fn void cJSON_Minify(char *json) * * @brief JSON minify. * * @author Administrator * @date 2017-01-17 * * @param [in,out] json If non-null, the JSON. **************************************************************************************************/
    
    void cJSON_Minify(char *json)
    { 
    	char *into=json;
    	while (*json)
    	{ 
    		if (*json==' ') json++;
    		else if (*json=='\t') json++;	/* Whitespace characters. */
    		else if (*json=='\r') json++;
    		else if (*json=='\n') json++;
    		else if (*json=='/' && json[1]=='/')  while (*json && *json!='\n') json++;	/* double-slash comments, to end of line. */
    		else if (*json=='/' && json[1]=='*') { while (*json && !(*json=='*' && json[1]=='/')) json++;json+=2;}	/* multiline comments. */
    		else if (*json=='\"'){ *into++=*json++;while (*json && *json!='\"'){ if (*json=='\\') *into++=*json++;*into++=*json++;}*into++=*json++;} /* string literals, which are \" sensitive. */
    		else *into++=*json++;			/* All other characters. */
    	}
    	*into=0;	/* and null-terminate. */
    }
    
     /**********************************************************************************************//** * @fn cJSON *cJSON_GetObjectItemChild(cJSON *object,const char *string) * * @brief JSON get object item child. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. * * @return Null if it fails, else a pointer to a cJSON. **************************************************************************************************/
    
     cJSON *cJSON_GetObjectItemChild(cJSON *object,const char *string)
     { 
        cJSON *ob= cJSON_GetObjectItem(object,string);
    	if (ob)
    	{ 
    		return ob->child;
    	}
    	return NULL;
     }
    
     /**********************************************************************************************//** * @fn char *cJSON_GetObjectItemString(cJSON *object,const char *string) * * @brief JSON get object item string. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. * * @return Null if it fails, else a pointer to a char. **************************************************************************************************/
    
     char *cJSON_GetObjectItemString(cJSON *object,const char *string)
     { 
    	 cJSON *ob= cJSON_GetObjectItem(object,string);
    	 if (ob)
    	 { 
    		 return ob->valuestring;
    	 }
    	 return NULL;
     }
    
     /**********************************************************************************************//** * @fn int cJSON_GetObjectItemInt(cJSON *object,const char *string) * * @brief JSON get object item int. * * @author Administrator * @date 2017-01-17 * * @param [in,out] object If non-null, the object. * @param string The string. * * @return An int. **************************************************************************************************/
    
     int cJSON_GetObjectItemInt(cJSON *object,const char *string)
     { 
    	 cJSON *ob= cJSON_GetObjectItem(object,string);
    	 if (ob)
    	 { 
    		 return ob->valueint;
    	 }
    	 return 0;
     }
     double cJSON_GetObjectItemDouble(cJSON *object, const char *string)
     { 
    	 cJSON *ob = cJSON_GetObjectItem(object, string);
    	 if (ob)
    	 { 
    		 return ob->valuedouble;
    	 }
    	 return 0;
     }