Function stringSplit

tfjs-backend-wasm/src/kernels/StringSplit.ts:23–52

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

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

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

  const inputVals = backend.readSync(input.dataId) as Uint8Array[];
  const delimiterVals = backend.readSync(delimiter.dataId) as Uint8Array[];

  const [indices, values, shape] =
      stringSplitImplCPU(inputVals, delimiterVals[0], skipEmpty);
  const outputSize = values.length;

  const indicesOut = backend.makeOutput([outputSize, 2], 'int32');
  const indicesOutVals = backend.typedArrayFromHeap(indicesOut);
  indicesOutVals.set(indices);

  const valuesOut = backend.makeOutput([outputSize], 'string');
  const valuesOutData = backend.dataIdMap.get(valuesOut.dataId);
  valuesOutData.stringBytes = values;

  const shapeOut = backend.makeOutput([2], 'int32');
  const shapeOutVals = backend.typedArrayFromHeap(shapeOut);
  shapeOutVals.set(shape);

  return [indicesOut, valuesOut, shapeOut];
}

export const stringSplitConfig: KernelConfig = {
  kernelName: StringSplit,