/// <summary>
/// 是否为空值
/// </summary>
/// <param name="buffer">The buffer.</param>
/// <returns></returns>
public virtual bool IsNullValue(ArraySegmentValue buffer)
{
if (buffer.Length == 4 && buffer[1] <= 'u' &&
(buffer[0] == 'n' || buffer[0] == 'N') &&
(buffer[1] == 'u' || buffer[1] == 'U') &&
(buffer[2] == 'l' || buffer[2] == 'L') &&
(buffer[3] == 'l' || buffer[3] == 'L'))
{
return(true);
}
return(false);
}
/// <summary>
/// 获取有符号的数值
/// </summary>
/// <param name="buffer">值数组</param>
/// <param name="minus">是否为负数</param>
/// <param name="max">最大值</param>
/// <param name="min">最小值</param>
/// <param name="bufferLength">数组长度，通常是buffer参数的长度，但由于一些空格原因，不会处理空格的</param>
/// <returns></returns>
public static long ParseGigit(ArraySegmentValue buffer, bool minus, long max, long min, int bufferLength)
{
if (buffer.IsEmpty)
{
return(0);
}
long result = 0;
if (minus)
{
var minu = min == long.MinValue ? 9223372036854775807 : -min;
for (var i = 1; i < bufferLength; i++)
{
switch (buffer[i])
{
case '0':
case '\x0':
{
result += (long)GetInteger(bufferLength - i) * 0;
}
break;
case '1':
case '\x1':
{
result += (long)GetInteger(bufferLength - i) * 1;
}
break;
case '2':
case '\x2':
{
result += (long)GetInteger(bufferLength - i) * 2;
}
break;
case '3':
case '\x3':
{
result += (long)GetInteger(bufferLength - i) * 3;
}
break;
case '4':
case '\x4':
{
result += (long)GetInteger(bufferLength - i) * 4;
}
break;
case '5':
case '\x5':
{
result += (long)GetInteger(bufferLength - i) * 5;
}
break;
case '6':
case '\x6':
{
result += (long)GetInteger(bufferLength - i) * 6;
}
break;
case '7':
case '\x7':
{
result += (long)GetInteger(bufferLength - i) * 7;
}
break;
case '8':
case '\x8':
{
result += (long)GetInteger(bufferLength - i) * 8;
}
break;
case '9':
case '\x9':
{
result += (long)GetInteger(bufferLength - i) * 9;
}
break;
default:
{
throw new ArgumentException("");
}
}
if (result > minu)
{
throw new ArgumentOutOfRangeException("");
}
}
return(-result);
}
for (var i = 0; i < bufferLength; i++)
{
switch (buffer[i])
{
case '0':
case '\x0':
{
result += (long)GetInteger(bufferLength - i) * 0;
}
break;
case '1':
case '\x1':
{
result += (long)GetInteger(bufferLength - i) * 1;
}
break;
case '2':
case '\x2':
{
result += (long)GetInteger(bufferLength - i) * 2;
}
break;
case '3':
case '\x3':
{
result += (long)GetInteger(bufferLength - i) * 3;
}
break;
case '4':
case '\x4':
{
result += (long)GetInteger(bufferLength - i) * 4;
}
break;
case '5':
case '\x5':
{
result += (long)GetInteger(bufferLength - i) * 5;
}
break;
case '6':
case '\x6':
{
result += (long)GetInteger(bufferLength - i) * 6;
}
break;
case '7':
case '\x7':
{
result += (long)GetInteger(bufferLength - i) * 7;
}
break;
case '8':
case '\x8':
{
result += (long)GetInteger(bufferLength - i) * 8;
}
break;
case '9':
case '\x9':
{
result += (long)GetInteger(bufferLength - i) * 9;
}
break;
default:
{
throw new ArgumentException("");
}
}
if (result > max)
{
throw new ArgumentOutOfRangeException("");
}
}
return(result);
}
/// <summary>
/// 获取无符号的数值
/// </summary>
/// <param name="buffer">值数组</param>
/// <param name="max">最大值</param>
/// <param name="bufferLength">数组长度，通常是buffer参数的长度，但由于一些空格原因，不会处理空格的</param>
/// <returns></returns>
public static ulong ParseUnsignedGigit(ArraySegmentValue buffer, ulong max, int bufferLength)
{
if (buffer.IsEmpty)
{
return(0);
}
if (buffer[0] == '-')
{
throw new ArgumentException("正数取值第一位不可能为'-'");
}
ulong result = 0;
for (var i = 0; i < bufferLength; i++)
{
switch (buffer[i])
{
case '0':
case '\x0':
{
result += GetInteger(bufferLength - i) * 0;
}
break;
case '1':
case '\x1':
{
result += GetInteger(bufferLength - i) * 1;
}
break;
case '2':
case '\x2':
{
result += GetInteger(bufferLength - i) * 2;
}
break;
case '3':
case '\x3':
{
result += GetInteger(bufferLength - i) * 3;
}
break;
case '4':
case '\x4':
{
result += GetInteger(bufferLength - i) * 4;
}
break;
case '5':
case '\x5':
{
result += GetInteger(bufferLength - i) * 5;
}
break;
case '6':
case '\x6':
{
result += GetInteger(bufferLength - i) * 6;
}
break;
case '7':
case '\x7':
{
result += GetInteger(bufferLength - i) * 7;
}
break;
case '8':
case '\x8':
{
result += GetInteger(bufferLength - i) * 8;
}
break;
case '9':
case '\x9':
{
result += GetInteger(bufferLength - i) * 9;
}
break;
default:
{
throw new ArgumentException("");
}
}
if (result > max)
{
throw new ArgumentOutOfRangeException("");
}
}
return(result);
}
/// <summary>
/// 获取int的数值
/// </summary>
/// <param name="buffer">值数组</param>
/// <param name="endLength">数组长度，通常是buffer参数的长度，但由于一些空格原因，不会处理空格的</param>
/// <returns></returns>
public static uint ParseUInt32(ArraySegmentValue buffer, int endLength)
{
return((uint)ParseUnsignedGigit(buffer, uint.MaxValue, endLength));
}
/// <summary>
/// 获取int的数值
/// </summary>
/// <param name="buffer">值数组</param>
/// <param name="endLength">数组长度，通常是buffer参数的长度，但由于一些空格原因，不会处理空格的</param>
/// <returns></returns>
public static ushort ParseUInt16(ArraySegmentValue buffer, int endLength)
{
return((ushort)ParseUnsignedGigit(buffer, ushort.MaxValue, endLength));
}
/// <summary>
/// 获取long的数值
/// </summary>
/// <param name="buffer">值数组</param>
/// <param name="endLength">数组长度，通常是buffer参数的长度，但由于一些空格原因，不会处理空格的</param>
/// <returns></returns>
public static ulong ParseUInt64(ArraySegmentValue buffer, int endLength)
{
return(ParseUnsignedGigit(buffer, ulong.MaxValue, endLength));
}
/// <summary>
/// 获取int的数值
/// </summary>
/// <param name="buffer">值数组</param>
/// <param name="endLength">数组长度，通常是buffer参数的长度，但由于一些空格原因，不会处理空格的</param>
/// <returns></returns>
public static byte ParseByte(ArraySegmentValue buffer, int endLength)
{
return((byte)ParseGigit(buffer, false, byte.MaxValue, byte.MinValue, endLength));
}
/// <summary>
/// 获取int的数值
/// </summary>
/// <param name="buffer">值数组</param>
/// <param name="endLength">数组长度，通常是buffer参数的长度，但由于一些空格原因，不会处理空格的</param>
/// <returns></returns>
public static short ParseInt16(ArraySegmentValue buffer, int endLength)
{
return((short)ParseGigit(buffer, buffer[0] == '-', short.MaxValue, short.MinValue, endLength));
}
/// <summary>
/// 获取int的数值
/// </summary>
/// <param name="buffer">值数组</param>
/// <param name="endLength">数组长度，通常是buffer参数的长度，但由于一些空格原因，不会处理空格的</param>
/// <returns></returns>
public static int ParseInt32(ArraySegmentValue buffer, int endLength)
{
return((int)ParseGigit(buffer, buffer[0] == '-', int.MaxValue, int.MinValue, endLength));
}
/// <summary>
/// 获取long的数值
/// </summary>
/// <param name="buffer">值数组</param>
/// <param name="endLength">数组长度，通常是buffer参数的长度，但由于一些空格原因，不会处理空格的</param>
/// <returns></returns>
public static long ParseInt64(ArraySegmentValue buffer, int endLength)
{
return(ParseGigit(buffer, buffer[0] == '-', long.MaxValue, long.MinValue, endLength));
}