ArrayHelper.cs

Go to the documentation of this file.

namespace System.Xml;
 
internal abstract class ArrayHelper<TArgument, TArray>
{
    public TArray[] ReadArray(XmlDictionaryReader reader, TArgument localName, TArgument namespaceUri, int maxArrayLength)
    {
        TArray[][] array = null;
        TArray[] array2 = null;
        int num = 0;
        int num2 = 0;
        if (reader.TryGetArrayLength(out var count))
        {
            if (count > 65535)
            {
                count = 65535;
            }
        }
        else
        {
            count = 32;
        }
        while (true)
        {
            array2 = new TArray[count];
            int i;
            int num3;
            for (i = 0; i < array2.Length; i += num3)
            {
                num3 = ReadArray(reader, localName, namespaceUri, array2, i, array2.Length - i);
                if (num3 == 0)
                {
                    break;
                }
            }
            num2 += i;
            if (i < array2.Length || reader.NodeType == XmlNodeType.EndElement)
            {
                break;
            }
            if (array == null)
            {
                array = new TArray[32][];
            }
            array[num++] = array2;
            count *= 2;
        }
        if (num2 != array2.Length || num > 0)
        {
            TArray[] array3 = new TArray[num2];
            int num4 = 0;
            for (int j = 0; j < num; j++)
            {
                Array.Copy(array[j], 0, array3, num4, array[j].Length);
                num4 += array[j].Length;
            }
            Array.Copy(array2, 0, array3, num4, num2 - num4);
            array2 = array3;
        }
        return array2;
    }
 
    public void WriteArray(XmlDictionaryWriter writer, string prefix, TArgument localName, TArgument namespaceUri, XmlDictionaryReader reader)
    {
        int count = ((!reader.TryGetArrayLength(out count)) ? 256 : Math.Min(count, 256));
        TArray[] array = new TArray[count];
        while (true)
        {
            int num = ReadArray(reader, localName, namespaceUri, array, 0, array.Length);
            if (num != 0)
            {
                WriteArray(writer, prefix, localName, namespaceUri, array, 0, num);
                continue;
            }
            break;
        }
    }
 
    protected abstract int ReadArray(XmlDictionaryReader reader, TArgument localName, TArgument namespaceUri, TArray[] array, int offset, int count);
 
    protected abstract void WriteArray(XmlDictionaryWriter writer, string prefix, TArgument localName, TArgument namespaceUri, TArray[] array, int offset, int count);
}