/// <summary>
/// Converts a stream paging resolver to a stream collection.
/// </summary>
/// <param name="streams">A stream paging resolver.</param>
/// <returns>A stream collection.</returns>
public static IEnumerable <Stream> ToStreamCollection(StreamPagingResolver streams)
{
if (streams == null)
{
yield break;
}
for (var i = 0; ; i++)
{
Stream stream;
try
{
stream = streams(i);
if (stream == null)
{
break;
}
}
catch (ArgumentException)
{
break;
}
yield return(stream);
}
}
/// <summary> /// Reads characters from the streams and advances the position within each stream to the end. /// </summary> /// <param name="streams">The stream collection to read.</param> /// <param name="encoding">The encoding to read text.</param> /// <param name="closeStream">true if need close stream automatically after read; otherwise, false.</param> /// <returns>Bytes from the stream collection.</returns> /// <exception cref="NotSupportedException">The stream does not support reading.</exception> /// <exception cref="ObjectDisposedException">The stream has disposed.</exception> public static IEnumerable <char> ReadChars(StreamPagingResolver streams, Encoding encoding = null, bool closeStream = false) => ReadChars(StreamCopy.ToStreamCollection(streams), encoding, closeStream);
/// <summary>
/// Initializes a new instance of the CharsReader class.
/// </summary>
/// <param name="streams">The stream collection to read.</param>
/// <param name="encoding">The encoding to read text.</param>
/// <param name="closeStream">true if need close stream automatically after read; otherwise, false.</param>
public CharsReader(StreamPagingResolver streams, Encoding encoding = null, bool closeStream = false)
{
enumerator = ReadChars(streams, encoding, closeStream).GetEnumerator();
}
/// <summary> /// Reads lines from a specific stream collection. /// </summary> /// <param name="streams">The stream collection to read.</param> /// <param name="encoding">The character encoding to use.</param> /// <param name="removeEmptyLine">true if need remove the empty line; otherwise, false.</param> /// <param name="closeStream">true if need close stream automatically after read; otherwise, false.</param> /// <returns>Lines from the specific stream collection.</returns> /// <exception cref="NotSupportedException">The stream does not support reading.</exception> /// <exception cref="ObjectDisposedException">The stream has disposed.</exception> public static IEnumerable <string> ReadLines(StreamPagingResolver streams, Encoding encoding, bool removeEmptyLine = false, bool closeStream = false) => ReadLines(ReadChars(streams, encoding, closeStream), removeEmptyLine);
/// <summary>
/// Reads bytes from the streams and advances the position within each stream to the end.
/// </summary>
/// <param name="streams">The stream collection to read.</param>
/// <param name="closeStream">true if need close stream automatically after read; otherwise, false.</param>
/// <returns>Bytes from the stream collection.</returns>
/// <exception cref="NotSupportedException">The stream does not support reading.</exception>
/// <exception cref="ObjectDisposedException">The stream has disposed.</exception>
public static IEnumerable <byte> ReadBytes(StreamPagingResolver streams, bool closeStream = false)
{
return(ReadBytes(ToStreamCollection(streams), closeStream));
}
