private int CalCachDatablockSize(Cdy.Tag.TagType tagType, Cdy.Tag.RecordType recordType, int headSize, out int dataOffset, out int qulityOffset)
{
//单个数据块内容包括：时间戳(2)+数值+质量戳(1)
qulityOffset = headSize;
int count = CachMemoryTime;
//对于值改变的记录方式,提高内存分配量,以提高值改变记录的数据个数
if (recordType == RecordType.ValueChanged)
{
count = CachMemoryTime * 1000 / MemoryTimeTick;
}
//数据区偏移,时间戳占2个字节,质量戳占1个字节
dataOffset = headSize + count * 2;
switch (tagType)
{
case Cdy.Tag.TagType.Byte:
case Cdy.Tag.TagType.Bool:
qulityOffset = dataOffset + count;
return(qulityOffset + count);
case Cdy.Tag.TagType.Short:
case Cdy.Tag.TagType.UShort:
qulityOffset = dataOffset + count * 2;
return(qulityOffset + count);
case Cdy.Tag.TagType.Int:
case Cdy.Tag.TagType.UInt:
case Cdy.Tag.TagType.Float:
qulityOffset = dataOffset + count * 4;
return(qulityOffset + count);
case Cdy.Tag.TagType.Long:
case Cdy.Tag.TagType.ULong:
case Cdy.Tag.TagType.Double:
case Cdy.Tag.TagType.DateTime:
qulityOffset = dataOffset + count * 8;
return(qulityOffset + count);
case Cdy.Tag.TagType.String:
qulityOffset = dataOffset + count * Const.StringSize;
return(qulityOffset + count);
default:
return(0);
}
}
/// <summary>
/// 计算每个变量数据块的大小
/// </summary>
/// <param name="tagType"></param>
/// <returns></returns>
private int CalMergeBlockSize(Cdy.Tag.TagType tagType, Cdy.Tag.RecordType recordType, int blockHeadSize, out int dataOffset, out int qulityOffset)
{
//单个数据块内容包括：时间戳(2)+数值+质量戳(1)
qulityOffset = 0;
int regionHeadSize = blockHeadSize;
// int count = MemoryCachTime * 1000 / MemoryTimeTick;
int count = MergeMemoryTime;
//对于值改变的记录方式,提高内存分配量,以提高值改变记录的数据个数
if (recordType == RecordType.ValueChanged)
{
count = MergeMemoryTime * 1000 / MemoryTimeTick;
}
//用于解码时在头尾分别记录前一个区域的值和后一个区域的值
count += 2;
//数据区偏移，时间戳占2个字节
dataOffset = regionHeadSize + count * 2;
switch (tagType)
{
case Cdy.Tag.TagType.Byte:
case Cdy.Tag.TagType.Bool:
qulityOffset = dataOffset + count;
return(qulityOffset + count);
case Cdy.Tag.TagType.Short:
case Cdy.Tag.TagType.UShort:
qulityOffset = dataOffset + count * 2;
return(qulityOffset + count);
case Cdy.Tag.TagType.Int:
case Cdy.Tag.TagType.UInt:
case Cdy.Tag.TagType.Float:
qulityOffset = dataOffset + count * 4;
return(qulityOffset + count);
case Cdy.Tag.TagType.Long:
case Cdy.Tag.TagType.ULong:
case Cdy.Tag.TagType.Double:
case Cdy.Tag.TagType.DateTime:
case Cdy.Tag.TagType.IntPoint:
case Cdy.Tag.TagType.UIntPoint:
qulityOffset = dataOffset + count * 8;
return(qulityOffset + count);
case Cdy.Tag.TagType.IntPoint3:
case Cdy.Tag.TagType.UIntPoint3:
qulityOffset = dataOffset + count * 12;
return(qulityOffset + count);
case Cdy.Tag.TagType.LongPoint:
case Cdy.Tag.TagType.ULongPoint:
qulityOffset = dataOffset + count * 16;
return(qulityOffset + count);
case Cdy.Tag.TagType.LongPoint3:
case Cdy.Tag.TagType.ULongPoint3:
qulityOffset = dataOffset + count * 24;
return(qulityOffset + count);
case Cdy.Tag.TagType.String:
qulityOffset = dataOffset + count * Const.StringSize;
return(qulityOffset + count);
default:
return(0);
}
}
