json构建:
cJSON * jsonHead = NULL; cJSON * jsonListArray = NULL; cJSON * jsonItem = NULL; jsonHead = cJSON_CreateObject(); cJSON_AddItemToObject(jsonHead, JSON_CHAT_UI_MEMBER_TOTAL, cJSON_CreateNumber(member_total)); cJSON_AddItemToObject(jsonHead, JSON_CHAT_UI_USERID, cJSON_CreateNumber(pInfo->UserId)); //list jsonListArray = cJSON_CreateArray(); for(i = 0; i < pInfo->member_total; i++) { jsonItem = cJSON_CreateObject(); cJSON_AddItemToObject(jsonItem, JSON_CHAT_UI_IMAGE_ID, cJSON_CreateNumber(ImageId)); cJSON_AddItemToArray(jsonListArray, jsonItem); } //add list to header node cJSON_AddItemToObject(jsonHead, JSON_CHAT_UI_MEMBER_INFO, jsonListArray); //get json data point pListData = cJSON_Print(jsonHead); //write to file ret = FS_Write(fs_hdlr, pListData, dataLen, &write_size); ... //free json data if (NULL != jsonHead){ cJSON_Delete(jsonHead); jsonHead = NULL; } if (NULL != pListData){ kido_mem_free(pListData); pListData = NULL; }
json解析:
cJSON * jsonHead = NULL; cJSON * jsonListArray = NULL; cJSON * jsonListItem = NULL; cJSON * jsonObj = NULL; U8 listTotalNum = 0; //get list data dataLen = get_file_data(localFileName, &pListData); //parse header jsonHead=cJSON_Parse(pListData); jsonObj = cJSON_GetObjectItem(jsonHead, JSON_CHAT_UI_MEMBER_TOTAL); pInfo->member_total = jsonObj->valueint; //get list array json jsonListArray = cJSON_GetObjectItem(jsonHead, JSON_CHAT_UI_MEMBER_INFO); //parse list array json listTotalNum = cJSON_GetArraySize(jsonListArray); for(i = 0 ; i < listTotalNum ; i++) { jsonListItem=cJSON_GetArrayItem(jsonListArray, i); if(NULL != jsonListItem) { jsonObj = cJSON_GetObjectItem(jsonListItem, JSON_CHAT_UI_IMAGE_ID); if(jsonObj) pInfo->member_list[i].ImageId= jsonObj->valueint; ... } } //free json data if (NULL != jsonHead){ cJSON_Delete(jsonHead); jsonHead = NULL; }
保存的文件结果:
{ "member_total": 36, "UserId": 352618, "InfoArray": [{ "ImageId": 0 }, { "ImageId": 0 }, { "ImageId": 0 }, { "ImageId": 0 }, { "ImageId": 0 }, { "ImageId": 0 }] }
cJSON.h
#ifndef cJSON__h #define cJSON__h #ifdef __cplusplus extern "C" { #endif /* cJSON Types: */ #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_StringIsConst 512 /* The cJSON structure: */ typedef struct cJSON { struct cJSON *next,*prev; /* next/prev allow you to walk array/object chains. Alternatively, use GetArraySize/GetArrayItem/GetObjectItem */ struct cJSON *child; /* An array or object item will have a child pointer pointing to a chain of the items in the array/object. */ 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 */ char *string; /* The item's name string, if this item is the child of, or is in the list of subitems of an object. */ } cJSON; typedef struct cJSON_Hooks { void *(*malloc_fn)(size_t sz); void (*free_fn)(void *ptr); } cJSON_Hooks; /* Supply malloc, realloc and free functions to cJSON */ extern 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. */ extern cJSON *cJSON_Parse(const char *value); /* Render a cJSON entity to text for transfer/storage. Free the char* when finished. */ extern char *cJSON_Print(cJSON *item); /* Render a cJSON entity to text for transfer/storage without any formatting. Free the char* when finished. */ extern char *cJSON_PrintUnformatted(cJSON *item); /* Render a cJSON entity to text using a buffered strategy. prebuffer is a guess at the final size. guessing well reduces reallocation. fmt=0 gives unformatted, =1 gives formatted */ extern char *cJSON_PrintBuffered(cJSON *item,int prebuffer,int fmt); /* Delete a cJSON entity and all subentities. */ extern void cJSON_Delete(cJSON *c); /* Returns the number of items in an array (or object). */ extern int cJSON_GetArraySize(cJSON *array); /* Retrieve item number "item" from array "array". Returns NULL if unsuccessful. */ extern cJSON *cJSON_GetArrayItem(cJSON *array,int item); /* Get item "string" from object. Case insensitive. */ extern 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. */ extern const char *cJSON_GetErrorPtr(void); /* These calls create a cJSON item of the appropriate type. */ extern cJSON *cJSON_CreateNull(void); extern cJSON *cJSON_CreateTrue(void); extern cJSON *cJSON_CreateFalse(void); extern cJSON *cJSON_CreateBool(int b); extern cJSON *cJSON_CreateNumber(double num); extern cJSON *cJSON_CreateString(const char *string); extern cJSON *cJSON_CreateArray(void); extern cJSON *cJSON_CreateObject(void); /* These utilities create an Array of count items. */ extern cJSON *cJSON_CreateIntArray(const int *numbers,int count); extern cJSON *cJSON_CreateFloatArray(const float *numbers,int count); extern cJSON *cJSON_CreateDoubleArray(const double *numbers,int count); extern cJSON *cJSON_CreateStringArray(const char **strings,int count); /* Append item to the specified array/object. */ extern void cJSON_AddItemToArray(cJSON *array, cJSON *item); extern void cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item); extern void cJSON_AddItemToObjectCS(cJSON *object,const char *string,cJSON *item); /* Use this when string is definitely const (i.e. a literal, or as good as), and will definitely survive the cJSON object */ /* 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. */ extern void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item); extern void cJSON_AddItemReferenceToObject(cJSON *object,const char *string,cJSON *item); /* Remove/Detatch items from Arrays/Objects. */ extern cJSON *cJSON_DetachItemFromArray(cJSON *array,int which); extern void cJSON_DeleteItemFromArray(cJSON *array,int which); extern cJSON *cJSON_DetachItemFromObject(cJSON *object,const char *string); extern void cJSON_DeleteItemFromObject(cJSON *object,const char *string); /* Update array items. */ extern void cJSON_InsertItemInArray(cJSON *array,int which,cJSON *newitem); /* Shifts pre-existing items to the right. */ extern void cJSON_ReplaceItemInArray(cJSON *array,int which,cJSON *newitem); extern void cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem); /* Duplicate a cJSON item */ extern cJSON *cJSON_Duplicate(cJSON *item,int recurse); /* Duplicate will create a new, identical cJSON item to the one you pass, in new memory that will need to be released. With recurse!=0, it will duplicate any children connected to the item. The item->next and ->prev pointers are always zero on return from Duplicate. */ /* ParseWithOpts allows you to require (and check) that the JSON is null terminated, and to retrieve the pointer to the final byte parsed. */ extern cJSON *cJSON_ParseWithOpts(const char *value,const char **return_parse_end,int require_null_terminated); extern void cJSON_Minify(char *json); /* Macros for creating things quickly. */ #define cJSON_AddNullToObject(object,name) cJSON_AddItemToObject(object, name, cJSON_CreateNull()) #define cJSON_AddTrueToObject(object,name) cJSON_AddItemToObject(object, name, cJSON_CreateTrue()) #define cJSON_AddFalseToObject(object,name) cJSON_AddItemToObject(object, name, cJSON_CreateFalse()) #define cJSON_AddBoolToObject(object,name,b) cJSON_AddItemToObject(object, name, cJSON_CreateBool(b)) #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)) /* When assigning an integer value, it needs to be propagated to valuedouble too. */ #define cJSON_SetIntValue(object,val) ((object)?(object)->valueint=(object)->valuedouble=(val):(val)) #define cJSON_SetNumberValue(object,val) ((object)?(object)->valueint=(object)->valuedouble=(val):(val)) #ifdef __cplusplus } #endif #endif
cJON.c
/* cJSON */ /* JSON parser in C. */ #include <string.h> #include <stdio.h> #include <math.h> #include <stdlib.h> #include <float.h> #include <limits.h> #include <ctype.h> #include "cJSON.h" #include "CSInteract.h" static const char *ep; typedef struct {char *buffer; int length; int offset; } printbuffer; static void *(*cJSON_malloc)(size_t sz) = malloc; static void (*cJSON_free)(void *ptr) = free; const char *cJSON_GetErrorPtr(void) {return ep;} /* 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); 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 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; } 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); } /* 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); } char *cJSON_PrintUnformatted(cJSON *item) { return print_value(item,0,0,0); } 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. */ 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. */ 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. */ 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 */ 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. */ 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. */ 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. */ int cJSON_GetArraySize(cJSON *array) { cJSON *c=array->child; int i=0; while(c) { i++; c=c->next; } return i; } cJSON *cJSON_GetArrayItem(cJSON *array,int item) { cJSON *c=array->child; while (c && item>0) { item--; c=c->next; } return c; } 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. */ static void suffix_object(cJSON *prev,cJSON *item) {prev->next=item;item->prev=prev;} /* Utility for handling references. */ 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. */ void cJSON_AddItemToArray(cJSON *array, cJSON *item) { cJSON *c = array->child; if (!item) { return; } if (!c) { /* list is empty, start new one */ array->child = item; array->child->prev = item; } else { /* append to the end */ if (array->child->prev) { item->prev = array->child->prev; array->child->prev->next = item; array->child->prev = item; item->next = NULL; } else { while (c->next) c = c->next; suffix_object(c, item); array->child->prev = 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);} 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);} void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item) {cJSON_AddItemToArray(array,create_reference(item));} void cJSON_AddItemReferenceToObject(cJSON *object,const char *string,cJSON *item) {cJSON_AddItemToObject(object,string,create_reference(item));} 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;} void cJSON_DeleteItemFromArray(cJSON *array,int which) {cJSON_Delete(cJSON_DetachItemFromArray(array,which));} 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;} void cJSON_DeleteItemFromObject(cJSON *object,const char *string) {cJSON_Delete(cJSON_DetachItemFromObject(object,string));} /* Replace array/object items with new ones. */ 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;} 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);} 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: */ cJSON *cJSON_CreateNull(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_NULL;return item;} cJSON *cJSON_CreateTrue(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_True;return item;} cJSON *cJSON_CreateFalse(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_False;return item;} cJSON *cJSON_CreateBool(int b) {cJSON *item=cJSON_New_Item();if(item)item->type=b?cJSON_True:cJSON_False;return item;} 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;} cJSON *cJSON_CreateString(const char *string) {cJSON *item=cJSON_New_Item();if(item){item->type=cJSON_String;item->valuestring=cJSON_strdup(string);}return item;} cJSON *cJSON_CreateArray(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Array;return item;} cJSON *cJSON_CreateObject(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Object;return item;} /* Create Arrays: */ 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;} 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;} 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;} 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 */ 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; } 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. */ }