forked from fastCSharp/fastCSharp
/
charStream.cs
282 lines (281 loc) · 8.83 KB
/
charStream.cs
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using System;
using System.IO;
namespace fastCSharp
{
/// <summary>
/// 内存字符流
/// </summary>
public class charStream : IDisposable
{
/// <summary>
/// 内存字符流(请自行确保数据可靠性)
/// </summary>
public struct unsafer
{
/// <summary>
/// 内存字符流
/// </summary>
public charStream Stream;
/// <summary>
/// 增加数据流长度
/// </summary>
/// <param name="length">增加长度</param>
public void AddLength(int length)
{
Stream.Length += length;
}
/// <summary>
/// 设置数据流长度
/// </summary>
/// <param name="length">数据流长度</param>
public void SetLength(int length)
{
Stream.Length = length;
}
/// <summary>
/// 写数据
/// </summary>
/// <param name="value">数据</param>
public void Write(char value)
{
Stream.array[Stream.Length++] = value;
}
/// <summary>
/// 写数据
/// </summary>
/// <param name="stream">数据,不能为null</param>
public void Write(charStream stream)
{
Buffer.BlockCopy(stream.array, 0, Stream.array, Stream.Length << 1, stream.Length << 1);
Stream.Length += stream.Length;
}
}
/// <summary>
/// 非安全访问内存字符流
/// </summary>
/// <returns>非安全访问内存字符流</returns>
public unsafer Unsafer
{
get
{
return new unsafer { Stream = this };
}
}
/// <summary>
/// 默认容器初始尺寸
/// </summary>
public const int DefaultLength = 256;
/// <summary>
/// 数据
/// </summary>
private char[] array;
/// <summary>
/// 数据
/// </summary>
public char[] Array
{
get { return array; }
}
/// <summary>
/// 当前数据长度
/// </summary>
public int Length { get; private set; }
/// <summary>
/// 内存数据流
/// </summary>
public charStream() : this(DefaultLength) { }
/// <summary>
/// 内存数据流
/// </summary>
/// <param name="length">容器初始尺寸</param>
public charStream(int length)
{
array = new char[length > 0 ? length : DefaultLength];
}
/// <summary>
/// 释放数据容器
/// </summary>
public void Dispose()
{
Close();
}
/// <summary>
/// 释放数据容器
/// </summary>
public void Close()
{
array = null;
}
/// <summary>
/// 设置容器尺寸
/// </summary>
/// <param name="length">容器尺寸</param>
private void setArrayLength(int length)
{
char[] data = new char[length];
Buffer.BlockCopy(array, 0, data, 0, Length << 1);
array = data;
}
/// <summary>
/// 设置容器尺寸
/// </summary>
/// <param name="length">容器尺寸</param>
public void SetArrayLength(int length)
{
if ((length += Length) > array.Length) setArrayLength(length);
}
/// <summary>
/// 预增数据流长度
/// </summary>
/// <param name="length">增加长度</param>
/// <returns>是否需要增加容器尺寸</returns>
public bool PrepLength(int length)
{
int newLength = length + Length;
if (newLength > array.Length)
{
setArrayLength(length > Length ? newLength : (Length << 1));
return true;
}
return false;
}
/// <summary>
/// 预增数据流长度
/// </summary>
/// <param name="length">增加长度</param>
private void prepLength(int length)
{
int newLength = length + Length;
if (newLength > array.Length) setArrayLength(length > Length ? newLength : (Length << 1));
}
/// <summary>
/// 检测是否需要预增数据容器尺寸
/// </summary>
/// <param name="length">增加数据流长度</param>
/// <returns>是否需要预增数据容器尺寸</returns>
public bool Check(int length)
{
return Length + length <= array.Length;
}
/// <summary>
/// 重置当前数据长度
/// </summary>
/// <param name="length">当前数据长度</param>
public void SetLength(int length)
{
if (length > 0)
{
if (length > array.Length) setArrayLength(length);
Length = length;
}
else if (length == 0) Length = 0;
else log.Default.Throw(log.exceptionType.IndexOutOfRange);
}
/// <summary>
/// 写数据
/// </summary>
/// <param name="value">数据</param>
public void Write(char value)
{
if (Length == array.Length) setArrayLength(Length << 1);
array[Length++] = value;
}
/// <summary>
/// 写数据
/// </summary>
/// <param name="stream">数据</param>
public void Write(charStream stream)
{
if (stream != null)
{
prepLength(stream.Length);
Buffer.BlockCopy(stream.array, 0, array, Length << 1, stream.Length << 1);
Length += stream.Length;
}
}
/// <summary>
/// 写字符串
/// </summary>
/// <param name="value">字符串</param>
public unsafe void Write(string value)
{
if (value != null)
{
prepLength(value.Length);
fixed (char* dataFixed = array) fastCSharp.unsafer.String.Copy(value, dataFixed + Length);
Length += value.Length;
}
}
/// <summary>
/// 写字符串
/// </summary>
/// <param name="start">字符串起始位置</param>
/// <param name="count">写入字符数</param>
public unsafe void Write(char* start, int count)
{
if (start != null)
{
prepLength(count);
fixed (char* dataFixed = array) memory.Copy(start, dataFixed + Length, count);
Length += count;
}
}
/// <summary>
/// 写字符串
/// </summary>
/// <param name="value">字符串</param>
/// <param name="index">起始位置</param>
/// <param name="count">写入字符数</param>
public unsafe void Write(string value, int index, int count)
{
array.range range = new array.range(value.length(), index, count);
if (range.GetCount == count)
{
prepLength(count);
fixed (char* dataFixed = array, valueFixed = value)
{
fastCSharp.unsafer.memory.Copy(valueFixed + index, dataFixed + Length, count);
}
Length += count;
}
else if (count != 0) log.Default.Throw(log.exceptionType.IndexOutOfRange);
}
/// <summary>
/// 写字符串集合
/// </summary>
/// <param name="values">字符串集合</param>
public unsafe void Write(params string[] values)
{
if (values != null)
{
int length = 0;
foreach (string value in values)
{
if (value != null) length += value.Length;
}
prepLength(length);
fixed (char* dataFixed = array)
{
char* write = dataFixed + Length;
foreach (string value in values)
{
if (value != null)
{
fastCSharp.unsafer.String.Copy(value, write);
write += value.Length;
}
}
}
Length += length;
}
}
/// <summary>
/// 转换成字符串
/// </summary>
/// <returns>字符串</returns>
public override unsafe string ToString()
{
fixed (char* dataFixed = array) return new string(dataFixed, 0, Length);
}
}
}