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prototype versions of ReplaceObject.

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Based on an idea from Daniel Harcek; these are designed to allow you to replace entries in an object or array with new
values. The old values get deleted and the new ones are wired into place.

This leads to a structure like this:
cJSON_ReplaceItemInObject(myobject, "spooncount", cJSON_CreateNumber(24));

cJSON +NEVER+ type checks, so it's perfectly legal to replace an object with a string (to cJSON) though it may not be in your schema!



git-svn-id: http://svn.code.sf.net/p/cjson/code@13 e3330c51-1366-4df0-8b21-3ccf24e3d50e
This commit is contained in:
Dave Gamble 2009-11-10 23:32:11 +00:00
parent 5cca4e2c57
commit b3bd706f8f
2 changed files with 13 additions and 3 deletions
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6
cJSON.c
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@ -450,6 +450,12 @@ static void suffix_object(cJSON *prev,cJSON *item) {prev->next=item;item->prev=p
void cJSON_AddItemToArray(cJSON *array, cJSON *item) {cJSON *c=array->child;if (!c) {array->child=item;} else {while (c && c->next) c=c->next; suffix_object(c,item);}}
void cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item) {if (item->string) cJSON_free(item->string);item->string=cJSON_strdup(string);cJSON_AddItemToArray(object,item);}
// Replace array/object items with new ones.
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;cJSON_Delete(c);}
void cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem){int i=0;cJSON *c=object->child;while(c && strcasecmp(c->string,string))i++,c=c->next;if(c)cJSON_ReplaceItemInArray(object,i,newitem);}
// Create basic types:
cJSON *cJSON_CreateNull() {cJSON *item=cJSON_New_Item();item->type=cJSON_NULL;return item;}
cJSON *cJSON_CreateTrue() {cJSON *item=cJSON_New_Item();item->type=cJSON_True;return item;}

10
cJSON.h
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@ -73,7 +73,7 @@ extern int cJSON_GetArraySize(cJSON *array);
extern cJSON *cJSON_GetArrayItem(cJSON *array,int item);
// Get item "string" from object. Case insensitive.
extern cJSON *cJSON_GetObjectItem(cJSON *object,const char *string);
// These calls create a cJSON item of the appropriate type.
extern cJSON *cJSON_CreateNull();
extern cJSON *cJSON_CreateTrue();
@ -90,8 +90,12 @@ extern cJSON *cJSON_CreateDoubleArray(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_AddItemToArray(cJSON *array, cJSON *item);
extern void cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item);
// Update array items.
extern void cJSON_ReplaceItemInArray(cJSON *array,int which,cJSON *newitem);
extern void cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem);
#define cJSON_AddNullToObject(object,name) cJSON_AddItemToObject(object, name, cJSON_CreateNull())
#define cJSON_AddTrueToObject(object,name) cJSON_AddItemToObject(object, name, cJSON_CreateTrue())