internal override void MapIndexedToUnchecked <TU>(VectorStorage <TU> target, Func <int, T, TU> f, Zeros zeros, ExistingData existingData) { if (target is DenseVectorStorage <TU> denseTarget) { CommonParallel.For(0, Data.Length, 4096, (a, b) => { for (int i = a; i < b; i++) { denseTarget.Data[i] = f(i, Data[i]); } }); return; } // FALL BACK for (int i = 0; i < Length; i++) { target.At(i, f(i, Data[i])); } }
// VECTOR COPY internal override void CopyToUnchecked(VectorStorage <T> target, ExistingData existingData) { if (target is DenseVectorStorage <T> denseTarget) { if (!ReferenceEquals(this, denseTarget)) { Array.Copy(Data, 0, denseTarget.Data, 0, Data.Length); } return; } if (target is SparseVectorStorage <T> sparseTarget) { var indices = new List <int>(); var values = new List <T>(); for (int i = 0; i < Data.Length; i++) { var item = Data[i]; if (!Zero.Equals(item)) { values.Add(item); indices.Add(i); } } sparseTarget.Indices = indices.ToArray(); sparseTarget.Values = values.ToArray(); sparseTarget.ValueCount = values.Count; return; } // FALL BACK for (int i = 0; i < Data.Length; i++) { target.At(i, Data[i]); } }
internal virtual void CopySubVectorToUnchecked(VectorStorage <T> target, int sourceIndex, int targetIndex, int count, ExistingData existingData) { if (ReferenceEquals(this, target)) { var tmp = new T[count]; for (int i = 0; i < tmp.Length; i++) { tmp[i] = At(i + sourceIndex); } for (int i = 0; i < tmp.Length; i++) { At(i + targetIndex, tmp[i]); } return; } for (int i = sourceIndex, ii = targetIndex; i < sourceIndex + count; i++, ii++) { target.At(ii, At(i)); } }
// VECTOR COPY internal override void CopyToUnchecked(VectorStorage <T> target, ExistingData existingData) { if (target is SparseVectorStorage <T> sparseTarget) { CopyToUnchecked(sparseTarget); return; } // FALL BACK if (existingData == ExistingData.Clear) { target.Clear(); } if (ValueCount != 0) { for (int i = 0; i < ValueCount; i++) { target.At(Indices[i], Values[i]); } } }