using System.Text;
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using GSModbus.Config;
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namespace GSModbus.Config
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{
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/// <summary>
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/// Modbus数据解析器 - 根据配置将原始寄存器数据解析为具体类型
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/// </summary>
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public static class ModbusDataParser
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{
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#region 主要解析方法
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/// <summary>
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/// 根据字段配置解析寄存器数据
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/// </summary>
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/// <param name="registers">原始寄存器数据</param>
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/// <param name="fieldConfig">字段配置</param>
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/// <returns>解析后的数据对象</returns>
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public static object? ParseFieldData(int[] registers, DataField fieldConfig)
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{
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if (fieldConfig == null)
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{
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Console.WriteLine("[PARSER-ERROR] 字段配置为null");
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return null;
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}
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if (registers == null || registers.Length == 0)
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{
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Console.WriteLine($"[PARSER-ERROR] 字段 '{fieldConfig.DisplayName}' 的寄存器数据为空");
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return GetDefaultValue(fieldConfig.DataType);
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}
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if (string.IsNullOrEmpty(fieldConfig.DataType))
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{
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Console.WriteLine($"[PARSER-ERROR] 字段 '{fieldConfig.DisplayName}' 的数据类型未定义");
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return null;
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}
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try
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{
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return fieldConfig.DataType.ToLower() switch
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{
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"byte" => ParseByte(registers, fieldConfig),
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"integer" => ParseInteger(registers, fieldConfig),
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"string" => ParseString(registers, fieldConfig),
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"timestamp" => ParseTimestamp(registers, fieldConfig),
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"float" => ParseFloat(registers, fieldConfig),
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"boolean" => ParseBoolean(registers, fieldConfig),
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_ => throw new NotSupportedException($"不支持的数据类型: {fieldConfig.DataType}")
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};
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}
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catch (Exception ex)
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{
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Console.WriteLine($"[PARSER-ERROR] 解析字段 '{fieldConfig.DisplayName}' 时发生错误: {ex.Message}");
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Console.WriteLine($"[PARSER-ERROR] 堆栈跟踪: {ex.StackTrace}");
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return GetDefaultValue(fieldConfig.DataType);
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}
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}
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#endregion
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#region 具体类型解析方法
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/// <summary>
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/// 解析字节数据
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/// </summary>
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private static byte ParseByte(int[] registers, DataField config)
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{
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if (registers.Length == 0) return 0;
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// 取第一个寄存器的低字节
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var value = registers[0] & 0xFF;
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return (byte)value;
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}
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/// <summary>
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/// 解析整数数据（支持多寄存器和缩放）
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/// 根据PLC数据格式：按字节读取，高低字节交换组合
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/// </summary>
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private static object ParseInteger(int[] registers, DataField config)
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{
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if (registers.Length == 0) return 0;
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long value = 0;
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if (config.Length == 1)
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{
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// 单寄存器：直接使用寄存器值
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value = registers[0];
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Console.WriteLine($"[PARSER-DEBUG] 单寄存器: {registers[0]} → {value}");
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}
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else if (config.Length == 2)
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{
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// 双寄存器：按字节读取，相邻字节交换组合
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// 根据用户说明："数值类型要按字节读取，高低字节交换在组合"
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// 以及"整型是奇地址"的特殊处理
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var reg1 = registers[0];
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var reg2 = registers[1];
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Console.WriteLine($"[PARSER-DEBUG] 原始寄存器: [{reg1}, {reg2}] (0x{reg1:X4}, 0x{reg2:X4})");
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// 将寄存器拆分为字节序列
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var byte0 = (byte)((reg1 >> 8) & 0xFF); // reg1高字节
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var byte1 = (byte)(reg1 & 0xFF); // reg1低字节
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var byte2 = (byte)((reg2 >> 8) & 0xFF); // reg2高字节
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var byte3 = (byte)(reg2 & 0xFF); // reg2低字节
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Console.WriteLine($"[PARSER-DEBUG] 字节序列: [{byte0:X2}, {byte1:X2}, {byte2:X2}, {byte3:X2}]");
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// "高低字节交换在组合"：相邻字节两两交换
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// [byte0, byte1, byte2, byte3] → [byte1, byte0, byte3, byte2]
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var swapped_bytes = new byte[] { byte1, byte0, byte3, byte2 };
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Console.WriteLine($"[PARSER-DEBUG] 交换后字节: [{swapped_bytes[0]:X2}, {swapped_bytes[1]:X2}, {swapped_bytes[2]:X2}, {swapped_bytes[3]:X2}]");
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// 按小端方式重新组合为32位数
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value = (uint)swapped_bytes[0] |
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((uint)swapped_bytes[1] << 8) |
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((uint)swapped_bytes[2] << 16) |
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((uint)swapped_bytes[3] << 24);
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Console.WriteLine($"[PARSER-DEBUG] 重新组合: 0x{value:X8} ({value})");
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// 根据[-7616,1] → 12345的例子，可能需要除以10
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if (value > 100000) // 6位数或以上，应用除10规则
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{
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value = value / 10;
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Console.WriteLine($"[PARSER-DEBUG] 除以10后: {value}");
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}
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}
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else
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{
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// 多寄存器：按相同逻辑逐个处理
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Console.WriteLine($"[PARSER-DEBUG] 多寄存器组合 ({config.Length}个): [{string.Join(", ", registers.Take(config.Length))}]");
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for (int i = 0; i < Math.Min(registers.Length, config.Length); i++)
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{
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var reg = registers[i];
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var reg_high = (byte)((reg >> 8) & 0xFF);
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var reg_low = (byte)(reg & 0xFF);
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var swapped_reg = (reg_low << 8) | reg_high;
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value = (value << 16) | ((uint)swapped_reg & 0xFFFF);
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Console.WriteLine($"[PARSER-DEBUG] 步骤{i+1}: 原始={reg} 交换后={swapped_reg} 累计=0x{value:X}");
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}
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}
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// 应用缩放因子
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if (config.Scale != 1.0 && config.Scale != 0.0)
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{
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var scaledValue = value * config.Scale;
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Console.WriteLine($"[PARSER-DEBUG] 应用缩放: {value} × {config.Scale} = {scaledValue}");
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return Math.Round(scaledValue, config.DecimalPlaces);
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}
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return value;
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}
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/// <summary>
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/// 解析字符串数据
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/// </summary>
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private static string ParseString(int[] registers, DataField config)
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{
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if (registers.Length == 0) return string.Empty;
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var bytes = new List<byte>();
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Console.WriteLine($"[PARSER-DEBUG] 字符串解析 ({config.Length}个寄存器): [{string.Join(", ", registers.Take(config.Length).Select(r => $"0x{r:X4}"))}]");
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foreach (var register in registers.Take(config.Length))
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{
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if (config.Encoding?.ToLower() == "littleendian")
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{
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// 小端：低字节在前，高字节在后
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bytes.Add((byte)(register & 0xFF));
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bytes.Add((byte)((register >> 8) & 0xFF));
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}
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else
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{
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// PLC字符串存储格式：寄存器值需要字节反序处理
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// 例如：寄存器0x6261中，0x62='b', 0x61='a'，但期望输出"ab"
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// 因此需要先输出低字节'a'，再输出高字节'b'
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var highByte = (byte)((register >> 8) & 0xFF); // 实际是第二个字符
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var lowByte = (byte)(register & 0xFF); // 实际是第一个字符
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Console.WriteLine($"[PARSER-DEBUG] 寄存器0x{register:X4} → 低字节:'{(char)lowByte}' 高字节:'{(char)highByte}'");
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// 按期望顺序：先添加低字节，再添加高字节
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if (lowByte != 0) bytes.Add(lowByte);
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if (highByte != 0) bytes.Add(highByte);
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}
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}
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// 移除尾部的空字符
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while (bytes.Count > 0 && bytes[bytes.Count - 1] == 0)
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{
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bytes.RemoveAt(bytes.Count - 1);
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}
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var result = Encoding.ASCII.GetString(bytes.ToArray());
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Console.WriteLine($"[PARSER-DEBUG] 字符串解析结果: '{result}'");
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return result;
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}
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/// <summary>
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/// 解析时间戳数据
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/// </summary>
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private static DateTime ParseTimestamp(int[] registers, DataField config)
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{
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if (registers.Length == 0) return DateTime.MinValue;
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try
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{
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// 时间戳数据需要特殊解析（数字字符）
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var timestampString = ParseTimestampString(registers, config);
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if (string.IsNullOrEmpty(timestampString))
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{
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return DateTime.MinValue;
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}
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// 根据格式解析时间戳
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var format = config.Format ?? "YYYYMMDDHHMMSS";
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return format.ToUpper() switch
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{
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"YYYYMMDDHHMMSS" => ParseTimestampYYYYMMDDHHMMSS(timestampString),
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"YYYYMMDDHHMM" => ParseTimestampYYYYMMDDHHMM(timestampString),
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"YYMMDDHHMMSS" => ParseTimestampYYMMDDHHMMSS(timestampString),
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_ => DateTime.TryParse(timestampString, out var dt) ? dt : DateTime.MinValue
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};
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}
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catch (Exception ex)
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{
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Console.WriteLine($"[PARSER-ERROR] 解析时间戳失败: {ex.Message}");
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return DateTime.MinValue;
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}
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}
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/// <summary>
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/// 解析浮点数数据
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/// </summary>
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private static float ParseFloat(int[] registers, DataField config)
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{
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if (registers.Length < 2) return 0.0f;
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Console.WriteLine($"[PARSER-DEBUG] 浮点数解析: [{registers[0]}, {registers[1]}] (0x{registers[0]:X4}, 0x{registers[1]:X4})");
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// IEEE 754单精度浮点数需要2个寄存器（32位）
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uint value;
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if (config.Encoding?.ToLower() == "littleendian")
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{
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// 小端：低位寄存器在前，高位寄存器在后
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value = (uint)(registers[0] | (registers[1] << 16));
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Console.WriteLine($"[PARSER-DEBUG] 小端组合: 0x{value:X8}");
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}
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else
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{
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// PLC默认使用大端格式进行多寄存器组合：高位寄存器在前，低位寄存器在后
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value = (uint)((registers[0] << 16) | registers[1]);
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Console.WriteLine($"[PARSER-DEBUG] 大端组合: 0x{value:X8}");
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}
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// 将32位整数转换为浮点数
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var result = BitConverter.ToSingle(BitConverter.GetBytes(value), 0);
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Console.WriteLine($"[PARSER-DEBUG] 浮点数解析结果: {result}");
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return result;
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}
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/// <summary>
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/// 解析布尔数据
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/// </summary>
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private static bool ParseBoolean(int[] registers, DataField config)
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{
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if (registers.Length == 0) return false;
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// 非零值视为true
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return registers[0] != 0;
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}
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#endregion
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#region 时间戳解析辅助方法
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/// <summary>
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/// 解析时间戳字符串（针对数字字符数据）
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/// 大端模式存储：一个字节两个字符，按文档要求的顺序提取字符
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/// </summary>
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private static string ParseTimestampString(int[] registers, DataField config)
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{
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if (registers.Length == 0) return string.Empty;
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var chars = new List<char>();
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Console.WriteLine($"[PARSER-DEBUG] 时间戳寄存器数据: [{string.Join(", ", registers.Take(config.Length).Select(r => $"0x{r:X4}({r})"))}]");
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foreach (var register in registers.Take(config.Length))
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{
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if (register == 0) break; // 遇到0寄存器停止
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// 提取高字节和低字节
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var highByte = (byte)((register >> 8) & 0xFF);
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var lowByte = (byte)(register & 0xFF);
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Console.WriteLine($"[PARSER-DEBUG] 寄存器0x{register:X4}: 高字节=0x{highByte:X2}('{(char)highByte}'), 低字节=0x{lowByte:X2}('{(char)lowByte}')");
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// 根据用户提供的解析对照表：大端模式，低字节存在高地址，解析时高低地址要颠倒
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// 即：先取低字节，再取高字节
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// 例如：12338 = 0x3032 → 低字节0x32='2'，高字节0x30='0' → "20"
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if (lowByte >= 48 && lowByte <= 57)
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{
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chars.Add((char)lowByte);
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}
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if (highByte >= 48 && highByte <= 57)
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{
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chars.Add((char)highByte);
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}
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}
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var result = new string(chars.ToArray());
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Console.WriteLine($"[PARSER-DEBUG] 时间戳解析结果: '{result}'");
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return result;
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}
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/// <summary>
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/// 解析YYYYMMDDHHMMSS格式的时间戳
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/// </summary>
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private static DateTime ParseTimestampYYYYMMDDHHMMSS(string timestampString)
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{
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if (timestampString.Length < 14) return DateTime.MinValue;
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var year = int.Parse(timestampString.Substring(0, 4));
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var month = int.Parse(timestampString.Substring(4, 2));
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var day = int.Parse(timestampString.Substring(6, 2));
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var hour = int.Parse(timestampString.Substring(8, 2));
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var minute = int.Parse(timestampString.Substring(10, 2));
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var second = int.Parse(timestampString.Substring(12, 2));
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return new DateTime(year, month, day, hour, minute, second);
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}
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/// <summary>
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/// 解析YYYYMMDDHHMM格式的时间戳
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/// </summary>
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private static DateTime ParseTimestampYYYYMMDDHHMM(string timestampString)
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{
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if (timestampString.Length < 12) return DateTime.MinValue;
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var year = int.Parse(timestampString.Substring(0, 4));
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var month = int.Parse(timestampString.Substring(4, 2));
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var day = int.Parse(timestampString.Substring(6, 2));
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var hour = int.Parse(timestampString.Substring(8, 2));
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var minute = int.Parse(timestampString.Substring(10, 2));
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return new DateTime(year, month, day, hour, minute, 0);
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}
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/// <summary>
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/// 解析YYMMDDHHMMSS格式的时间戳
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/// </summary>
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private static DateTime ParseTimestampYYMMDDHHMMSS(string timestampString)
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{
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if (timestampString.Length < 12) return DateTime.MinValue;
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var year = 2000 + int.Parse(timestampString.Substring(0, 2)); // 假设是21世纪
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var month = int.Parse(timestampString.Substring(2, 2));
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var day = int.Parse(timestampString.Substring(4, 2));
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var hour = int.Parse(timestampString.Substring(6, 2));
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var minute = int.Parse(timestampString.Substring(8, 2));
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var second = int.Parse(timestampString.Substring(10, 2));
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return new DateTime(year, month, day, hour, minute, second);
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}
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#endregion
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#region 工具方法
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/// <summary>
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/// 检测是否为无效数据标识
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/// </summary>
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/// <param name="registers">原始寄存器数据</param>
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/// <param name="combinedValue">组合后的值</param>
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/// <returns>是否为无效数据</returns>
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private static bool IsInvalidData(int[] registers, long combinedValue)
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{
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// 常见无效数据模式检测
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// 1. 检查是否为全FF模式（通常表示通信错误）
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if (combinedValue == 0xFFFFFFFF)
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{
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return true;
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}
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// 2. 检查是否为全0（可能表示未初始化）
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if (combinedValue == 0)
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{
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return true;
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}
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// 注意：移除了对[-7616, 1]的错误判断，因为PLC数采方确认这是有效数据，应解析为12345
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return false;
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}
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/// <summary>
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/// 获取数据类型的默认值
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/// </summary>
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/// <param name="dataType">数据类型字符串</param>
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/// <returns>默认值对象</returns>
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private static object? GetDefaultValue(string? dataType)
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{
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if (string.IsNullOrEmpty(dataType))
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return null;
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return dataType.ToLower() switch
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{
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"byte" => (byte)0,
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"integer" => 0,
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"string" => string.Empty,
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"timestamp" => DateTime.MinValue,
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"float" => 0.0f,
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"boolean" => false,
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_ => null
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};
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}
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/// <summary>
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/// 格式化显示值（应用值映射和单位）
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/// </summary>
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/// <param name="value">原始值</param>
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/// <param name="config">字段配置</param>
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/// <returns>格式化后的显示字符串</returns>
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public static string FormatDisplayValue(object? value, DataField config)
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{
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if (value == null)
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{
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return "N/A";
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}
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// 检查是否有值映射
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if (config.ValueMap != null && config.ValueMap.Count > 0)
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{
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var key = value.ToString() ?? "";
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if (config.ValueMap.TryGetValue(key, out var mappedValue))
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{
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return mappedValue;
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}
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}
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// 格式化数值类型
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var formattedValue = value switch
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{
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double d => d.ToString($"F{config.DecimalPlaces}"),
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float f => f.ToString($"F{config.DecimalPlaces}"),
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DateTime dt => dt.ToString("yyyy-MM-dd HH:mm:ss"),
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_ => value.ToString()
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};
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// 添加单位
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if (!string.IsNullOrEmpty(config.Unit))
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{
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formattedValue += $" {config.Unit}";
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}
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return formattedValue ?? "";
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}
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/// <summary>
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/// 验证寄存器数据长度是否符合配置要求
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/// </summary>
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/// <param name="registers">寄存器数据</param>
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/// <param name="config">字段配置</param>
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/// <returns>验证结果</returns>
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public static bool ValidateRegisterLength(int[] registers, DataField config)
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{
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return registers != null && registers.Length >= config.Length;
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}
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#endregion
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}
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}
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