jsonCreateObject (Function)

jsonCreateObject creates a new, empty JSON object.

When the JSON object is no longer needed, it must be released using jsonFree.

Input:

None

Output:

o : SYSHANDLE

A handle to the JSON object.

Returns: INT

Declaration:

FUNCTION jsonCreateObject : INT;
VAR_INPUT
  o     : ACCESS SYSHANDLE;
END_VAR;

Example:

INCLUDE rtcu.inc
 
PROGRAM test;
VAR
  rc  : INT;
  arr : SYSHANDLE;
  obj : SYSHANDLE;
END_VAR;
 
BEGIN
  ...
  // Create array
  rc := jsonCreateArray(o := arr);
  // Add integer
  rc := jsonAddValueInt(o := arr, value := 123);
  // Create object
  rc := jsonCreateObject(o := obj);
  // Add integer to object
  rc := jsonSetValueInt(o := obj, key := "Number", value := 42);
  // Replace integer in array with object
  rc := jsonSetValue(o := arr, idx := 0, value := obj);
  // Release object handle
  rc := jsonFree(o := obj);
  ...
END;
 
END_PROGRAM;