public override bool Equals(object obj)
{
SparseMatrixOld sm = obj as SparseMatrixOld;
if (sm != null)
{
if (this.ItemCount != sm.ItemCount ||
this.RowCount != sm.RowCount ||
this.ColCount != sm.ColCount
)
{
return(false);
}
var list = this.MatrixItems;
list.Sort();
var list2 = sm.MatrixItems;
list2.Sort();
int i = 0;
foreach (var item in this.MatrixItems)
{
if (!list[i].Equals(list2[i]))
{
return(false);
}
i++;
}
}
return(true);
}
/// <summary>
/// 从二进制文件中读取。
/// 格式定义：1. 前3个为int，分别指行、列和集合数量；2.后面子项集合，分别为行（int）列（int）标号和双精度值。
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static SparseMatrixOld FromBinary(string path)
{
SparseMatrixOld matr = null;
using (BinaryReader br = new BinaryReader(new FileStream(path, FileMode.Open, FileAccess.Read)))
{
int RowCount = br.ReadInt32();
int ColCount = br.ReadInt32();
matr = new SparseMatrixOld(RowCount, ColCount);
int itemCount = br.ReadInt32();
for (int i = 0; i < itemCount; i++)
{
//各个节点位置无关，可以考虑并行存取，但是由于内存共享，还得序列化读取。
MatrixItem item = new MatrixItem()
{
Row = br.ReadInt32(), Col = br.ReadInt32(), Value = br.ReadDouble()
};
matr.MatrixItems.Add(item);
}
return(matr);
}
}