/// <summary>
/// 解包
/// </summary>
/// <param name="B_Msg">字节报文：11字节报文头+2字节消息类型+8字节位图+n数据元</param>
public void UnPack8583(byte[] B_Msg)
{
if (string.IsNullOrEmpty(_messageType))
{
_messageType = GetMessageType(B_Msg);
InitTab(_messageType);
}
//报文不合法
if (B_Msg.Length < 21)
{
tab[0].data = Encoding.GetBytes("Error:Packed lenth<44");
return;
}
Array.Copy(B_Msg, 0, this.TPDU, 0, 5);
byte[] bitmap = new byte[8];
string S_BitMap = "";
int maplen = 8;
for (int i = 13; i < 21; i++) //取16位位图 8个字节
{
bitmap[i - 13] = B_Msg[i];
}
for (int i = 0; i < maplen; i++)
{
string T_BitMap = I8583.AcceptConvertString(System.Convert.ToString(bitmap[i]), 10, 2);
S_BitMap = S_BitMap + T_BitMap;
}
//取MessageType 2个字节
byte[] msgType = new byte[2];
msgType[0] = B_Msg[11];
msgType[1] = B_Msg[12];
//_messageType = SendConvertString(msgType[0].ToString(), 10, 16).PadLeft(2, '0') + SendConvertString(msgType[1].ToString(), 10, 16).PadLeft(2, '0');
//解读报文
int n = 0;
int ptr = 21;
foreach (char C_BitMap in S_BitMap)
{
string flag = Convert.ToString(C_BitMap);
if (flag == "1")
{
try
{
List <byte> data = new List <byte>();
int len = 0;
int m_len = 0;
switch (tab[n].dataType)
{
case DataType.BCD:
#region BCD
if (tab[n].len_var > 0)
{
//变长字段
if (tab[n].len_var == 2)
{
//两位变长
len = int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
if (tab[n].C)
{
len = len * 2;
}
ptr++;
}
else if (tab[n].len_var == 3)
{
//三位变长
//第一位长度
len = int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
len = len * 100;
ptr++;
//第二位是具体的长度
len = len + int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
if (tab[n].C)
{
len = len * 2;
}
ptr++;
}
m_len = len;
if (len % 2 == 1)
{
//如果数据长度为奇数 需要补一位
len = len / 2 + 1;
}
else
{
len = len / 2;
}
}
else
{
//定长字段
m_len = tab[n].len;
len = tab[n].len / 2;
if (tab[n].len % 2 == 1)
{
len++;
}
}
for (int i = 0; i < len; i++)
{
var s = SendConvertString(B_Msg[ptr].ToString(), 10, 16).PadLeft(2, '0');
data.Add(Convert.ToByte(s[0]));
data.Add(Convert.ToByte(s[1]));
ptr++;
}
//去掉自动补充的位（‘0’）
data = data.Take(m_len).ToList();
this.settabx_data(n, data.ToArray());
#endregion
break;
case DataType.ASCII:
#region ASCII
if (tab[n].len_var > 0)
{
//变长字段
if (tab[n].len_var == 2)
{
//两位变长
len = int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
if (tab[n].C)
{
len = len * 2;
}
ptr++;
}
else if (tab[n].len_var == 3)
{
//三位变长
//第一位长度
len = int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
len = len * 100;
ptr++;
//第二位是具体的长度
len = len + int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
if (tab[n].C)
{
len = len * 2;
}
ptr++;
}
m_len = len;
////变长字段
//if (tab[n].len_var == 2)
//{
// //两位变长
// len = int.Parse(SendConvertString(B_Msg[ptr++].ToString()+B_Msg[ptr].ToString(), 10, 16));
// ptr++;
//}
//else if (tab[n].len_var == 3)
//{
// //三位变长
// //第一位是长度
// len = int.Parse(SendConvertString(B_Msg[ptr++].ToString() +B_Msg[ptr++].ToString()+B_Msg[ptr].ToString(), 10, 16));
// len = len * 100;
// ptr++;
// //第二位是具体的长度
// len = len + int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
// ptr++;
//}
}
else
{
len = tab[n].len;
}
for (int i = 0; i < len; i++)
{
//byte[] m_b = new byte[1];
//m_b[0] = B_Msg[ptr];
//data += System.Text.Encoding.Default.GetString(m_b);
data.Add(B_Msg[ptr]);
ptr++;
}
this.settabx_data(n, data.ToArray());
#endregion
break;
case DataType.BINARY:
#region BINARY
if (tab[n].len_var > 0)
{
//变长字段
if (tab[n].len_var == 2)
{
//两位变长
len = int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
ptr++;
}
else if (tab[n].len_var == 3)
{
//三位变长
//第一位是0x00
len = int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
len = len * 100;
ptr++;
//第二位是具体的长度
len = len + int.Parse(SendConvertString(B_Msg[ptr].ToString(), 10, 16));
ptr++;
}
m_len = len;
if (len % 2 == 1)
{
//如果数据长度为奇数 需要补一位
len = len / 2 + 1;
}
else
{
len = len / 2;
}
}
else
{
//定长字段
len = tab[n].len / 2;
if (tab[n].len % 2 == 1)
{
len++;
}
}
for (int i = 0; i < len; i++)
{
//data += SendConvertString(B_Msg[ptr].ToString(), 10, 16).PadLeft(2, '0');
var s = SendConvertString(B_Msg[ptr].ToString(), 10, 16).PadLeft(2, '0');
data.Add(Convert.ToByte(s[0]));
data.Add(Convert.ToByte(s[1]));
ptr++;
}
if (m_len > 0)
{
//data = data.Substring(0, m_len);
data = data.Take(m_len).ToList();
}
this.settabx_data(n, data.ToArray());
#endregion
break;
default:
break;
}
}
catch
{
tab[0].data = Encoding.GetBytes("Error:Packed tab" + n.ToString());
return;
}
}
n++;
}
}
/// <summary>
/// 计算报文长度
/// 暂时不用 POS设备传过来的报文包含两个字节的长度
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static int GetDatagramLength(byte[] data)
{
//报文头11字节+消息类型2字节+位图8字节
int length = 21;
I8583 c = new I8583(GetMessageType(data));
byte[] bitmap = new byte[8];
string S_BitMap = "";
int maplen = 8;
for (int i = 13; i < 21; i++) //取16位位图
{
bitmap[i - 13] = data[i];
}
for (int i = 0; i < maplen; i++)
{
string T_BitMap = I8583.AcceptConvertString(System.Convert.ToString(bitmap[i]), 10, 2);
S_BitMap = S_BitMap + T_BitMap;
}
int idx = 0;
foreach (char bit in S_BitMap)
{
string tab = bit.ToString();
int len = 0;
if (length > data.Length)
{
return(-1);
}
if (tab == "1")
{
switch (c.tab[idx].dataType)
{
case DataType.BCD:
#region BCD
if (c.tab[idx].len_var > 0)
{
if (c.tab[idx].len_var == 2)
{
//两位变长
len = int.Parse(I8583.SendConvertString(data[length].ToString(), 10, 16));
length++;
}
else if (c.tab[idx].len_var == 3)
{
//三位变长
length++;
len = int.Parse(I8583.SendConvertString(data[length].ToString(), 10, 16));
length++;
}
if (len % 2 == 1)
{
//如果数据长度为奇数 需要补一位
len = len / 2 + 1;
}
else
{
len = len / 2;
}
}
else
{
//定长字段
len = c.tab[idx].len / 2;
if (c.tab[idx].len % 2 == 1)
{
len++;
}
}
length += len;
#endregion
break;
case DataType.ASCII:
#region ASCII
if (c.tab[idx].len_var > 0)
{
if (c.tab[idx].len_var == 2)
{
//两位变长
len = int.Parse(I8583.SendConvertString(data[length].ToString(), 10, 16));
length++;
}
else if (c.tab[idx].len_var == 3)
{
//三位变长
length++;
len = int.Parse(I8583.SendConvertString(data[length].ToString(), 10, 16));
length++;
}
}
else
{
len = c.tab[idx].len;
}
length += len;
#endregion
break;
case DataType.BINARY:
#region BINARY
if (c.tab[idx].len_var > 0)
{
if (c.tab[idx].len_var == 2)
{
//两位变长
len = int.Parse(I8583.SendConvertString(data[length].ToString(), 10, 16));
length++;
}
else if (c.tab[idx].len_var == 3)
{
//三位变长
length++;
len = int.Parse(I8583.SendConvertString(data[length].ToString(), 10, 16));
length++;
}
if (len % 2 == 1)
{
//如果数据长度为奇数 需要补一位
len = len / 2 + 1;
}
else
{
len = len / 2;
}
}
else
{
//定长字段
len = c.tab[idx].len / 2;
if (c.tab[idx].len % 2 == 1)
{
len++;
}
}
length += len;
#endregion
break;
default:
break;
}
}
idx++;
}
return(length);
}