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24 changes: 24 additions & 0 deletions extension/apple/ExecuTorch/Exported/ExecuTorchTensor.h
Original file line number Diff line number Diff line change
Expand Up @@ -222,4 +222,28 @@ __attribute__((deprecated("This API is experimental.")))

@end

#pragma mark - Bytes Category

@interface ExecuTorchTensor (Bytes)

/**
* Initializes a tensor by copying bytes from the provided pointer.
*
* @param pointer A pointer to the source data buffer.
* @param shape An NSArray of NSNumber objects representing the tensor's shape.
* @param strides An NSArray of NSNumber objects representing the tensor's strides.
* @param dimensionOrder An NSArray of NSNumber objects indicating the order of dimensions.
* @param dataType An ExecuTorchDataType value specifying the element type.
* @param shapeDynamism An ExecuTorchShapeDynamism value indicating the shape dynamism.
* @return An initialized ExecuTorchTensor instance with its own copy of the data.
*/
- (instancetype)initWithBytes:(const void *)pointer
shape:(NSArray<NSNumber *> *)shape
strides:(NSArray<NSNumber *> *)strides
dimensionOrder:(NSArray<NSNumber *> *)dimensionOrder
dataType:(ExecuTorchDataType)dataType
shapeDynamism:(ExecuTorchShapeDynamism)shapeDynamism;

@end

NS_ASSUME_NONNULL_END
25 changes: 25 additions & 0 deletions extension/apple/ExecuTorch/Exported/ExecuTorchTensor.mm
Original file line number Diff line number Diff line change
Expand Up @@ -140,3 +140,28 @@ - (instancetype)initWithBytesNoCopy:(void *)pointer
}

@end

@implementation ExecuTorchTensor (Bytes)

- (instancetype)initWithBytes:(const void *)pointer
shape:(NSArray<NSNumber *> *)shape
strides:(NSArray<NSNumber *> *)strides
dimensionOrder:(NSArray<NSNumber *> *)dimensionOrder
dataType:(ExecuTorchDataType)dataType
shapeDynamism:(ExecuTorchShapeDynamism)shapeDynamism {
ET_CHECK(pointer);
const auto size = ExecuTorchElementCountOfShape(shape) * ExecuTorchSizeOfDataType(dataType);
std::vector<uint8_t> data(static_cast<const uint8_t *>(pointer),
static_cast<const uint8_t *>(pointer) + size);
auto tensor = make_tensor_ptr(
utils::toVector<SizesType>(shape),
std::move(data),
utils::toVector<DimOrderType>(dimensionOrder),
utils::toVector<StridesType>(strides),
static_cast<ScalarType>(dataType),
static_cast<TensorShapeDynamism>(shapeDynamism)
);
return [self initWithNativeInstance:&tensor];
}

@end
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