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ndarray.md

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NDArray Message

  • Protocol Version: 3.0
  • Release Date: January 20, 2017

Summary

NDARRAY is a data type, which is designed to transfer N-dimensional numerical array.

Message Types

NDARRAY

Data Type Description
SCALAR_TYPE uint8 Scalar type (2:int8 3:uint8 4:int16 5:uint16 6:int32 7:uint32 10:float32 11:float64 13:complex float 64*)
DIM uint8 Dimension of array
SIZE uint16[DIM] Size of array
DATA ARRAY Array data. (Must be in the network byte order.)
  • ARRAY is a byte array SCALAR_TYPE[SIZE[0]][SIZE[1]]....[[SIZE[DIM-1]]]
  • Complex is a 128-bit variable consisting of a real part in the first 64-bit and an imaginal part in the last 64-bit.

GET_NDARRAY

Data Type Description 
          |               |

STT_NDARRAY

N/A

STP_NDARRAY

N/A

RTS_NDARRAY

N / A

Notes

Memory layout of DATA field

Like multi-dimensional array in C/C++, DATA field is laid out in sequentially in a byte stream. For example, if the value of DATA is defined by:

char data[3][3] = { {1, 2, 3},
                  {4, 5, 6},
                  {7, 8, 9}
                  };

The layout in the byte stream can be visualized as follows:

  +-+-+-+-+-+-+-+-+-+
  |1|2|3|4|5|6|7|8|9|
  +-+-+-+-+-+-+-+-+-+

Implementations

The NDARRAY message type is implemented in the following source code.

Contributors

  • Junichi Tokuda
  • Yuichiro Hayashi