Function stringSplit

tfjs-backend-webgl/src/kernels/StringSplit.ts:23–54

(args: {
  inputs: StringSplitInputs,
  backend: MathBackendWebGL,
  attrs: StringSplitAttrs
})

import {stringSplitImplCPU} from '../kernel_utils/shared';

export function stringSplit(args: {
  inputs: StringSplitInputs,
  backend: MathBackendWebGL,
  attrs: StringSplitAttrs
}): [TensorInfo, TensorInfo, TensorInfo] {
  const {inputs, backend, attrs} = args;
  const {skipEmpty} = attrs;
  const {input, delimiter} = inputs;

  if (input.dtype !== 'string') {
    throw new Error('Input must be of datatype string');
  }
  if (input.shape.length !== 1) {
    throw new Error(`Input must be a vector, got shape: ${input.shape}`);
  }
  if (delimiter.shape.length !== 0) {
    throw new Error(
        `Delimiter must be a scalar, got shape: ${delimiter.shape}`);
  }

  const $input = backend.readSync(input.dataId) as Uint8Array[];
  const $delimiter = backend.readSync(delimiter.dataId)[0] as Uint8Array;

  const [indices, values, shape] =
      stringSplitImplCPU($input, $delimiter, skipEmpty);
  const outputSize = values.length;
  return [
    backend.makeTensorInfo([outputSize, 2], 'int32', indices),
    backend.makeTensorInfo([outputSize], 'string', values),
    backend.makeTensorInfo([2], 'int32', new Int32Array(shape))
  ];
}

export const stringSplitConfig: KernelConfig = {
  kernelName: StringSplit,