EVOLUTION-MANAGER

Edit File: batch_util.h

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
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==============================================================================*/
#ifndef TENSORFLOW_CORE_UTIL_BATCH_UTIL_H_
#define TENSORFLOW_CORE_UTIL_BATCH_UTIL_H_

#include "tensorflow/core/framework/tensor.h"
#include "tensorflow/core/lib/core/status.h"

namespace tensorflow {
namespace batch_util {

// Copies element into the index^th slice of parent (in the 0th dimension).
//
// NOTE(mrry): The `element` argument is taken by value. Use `std::move()`
// to move the `element` argument into this function, and the implementation
// may be able to optimize the copy to a move. This is particularly important
// for DT_STRING tensors.
Status CopyElementToSlice(Tensor element, Tensor* parent, int64 index);

// Copies the index^th slice of parent (in the 0th dimension) into element.
Status CopySliceToElement(const Tensor& parent, Tensor* element, int64 index);

// Copies 'num_slices' contiguous slices from 'src' tensor starting from index
// 'src_offset' into target tensor 'dst', and places them into slices
// starting from 'dst_offset'.
//
// This function requires 'src' and 'dst' to have compatible shapes. That is it
// requires cum_prod(src.shape[1:] == cum_prod(dst->shape[1:]). For example if
// source is of shape [x, 2, 1] and dst is a tensor of shape [y, 1, 2], this
// function can still proceed successfully.
Status CopyContiguousSlices(const Tensor& src, int64 src_offset,
                            int64 dst_offset, int64 num_slices, Tensor* dst);

// Copies the index^th slice of parent (in the 0th dimension) into element.
//
// NOTE(mrry): The implementation may be able to optimize the copy to a move.
// This is particularly important for DT_STRING tensors.
Status MaybeMoveSliceToElement(Tensor* parent, Tensor* element, int64 index);

// Zero-initializes the tensor `element` using the scalar stored in `padding`.
// Both `element` and `padding` must have matching `dtype`.
Status SetElementZero(Tensor* element, const Tensor& padding);

// Copies `element` into a (0th dimension) slice of `parent`, assuming
// the shape of `element` is strictly not larger along any axis than a
// slice.
Status CopyElementToLargerSlice(const Tensor& element, Tensor* parent,
                                int index);

}  // namespace batch_util
}  // namespace tensorflow

#endif  // TENSORFLOW_CORE_UTIL_BATCH_UTIL_H_