Pchp.Library.Arrays.array_pad C# (CSharp) Method

        public static PhpArray array_pad(PhpArray array, int length, PhpValue value)
        {
            if (array == null)
            {
                // PhpException.ArgumentNull("array");
                // return null;
                throw new ArgumentNullException();
            }

            // number of items to add:
            int remains = Math.Abs(length) - array.Count;

            // returns unchanged array (or its deep copy if called from PHP):
            if (remains <= 0) return array;

            PhpArray result = new PhpArray(array.Count + remains);

            // prepends items:
            if (length < 0)
            {
                while (remains-- > 0) result.Add(value);
            }

            // inserts items from source array
            // if a key is a string inserts it unchanged otherwise inserts value with max. integer key:  
            var iterator = array.GetFastEnumerator();
            while (iterator.MoveNext())
            {
                var key = iterator.CurrentKey;
                if (key.IsString)
                    result.Add(key, iterator.CurrentValue);
                else
                    result.Add(iterator.CurrentValue);
            }

            // appends items:
            if (length > 0)
            {
                while (remains-- > 0) result.Add(value);
            }

            // the result is inplace deeply copied on return to PHP code:
            //result.InplaceCopyOnReturn = true;
            return result;
        }