/**
 * @license
 * Copyright 2018 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 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,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
import { nearestDivisor } from '../util';
import { PARALLELIZE_THRESHOLD } from './reduce_util';
export function segOpComputeOptimalWindowSize(inSize, numSegments) {
    let done = false;
    let res;
    if (inSize <= PARALLELIZE_THRESHOLD) {
        res = inSize;
        done = true;
    }
    else {
        res = nearestDivisor(inSize, Math.floor(Math.sqrt(inSize)));
    }
    while (!done) {
        if (res > numSegments || res === inSize) {
            done = true;
        }
        else {
            res = nearestDivisor(inSize, res + 1);
        }
    }
    return res;
}
export function computeOutShape(aShape, axis, numSegments) {
    const outShape = [];
    const rank = aShape.length;
    for (let dim = 0; dim < rank; dim++) {
        if (dim !== axis) {
            outShape.push(aShape[dim]);
        }
        else {
            outShape.push(numSegments);
        }
    }
    return outShape;
}
export function collectGatherOpShapeInfo(x, indices, axis, batchDims) {
    const indicesRank = indices.shape.length;
    const xRank = x.shape.length;
    if (batchDims !== 0) {
        if (batchDims < -indicesRank || batchDims > indicesRank) {
            throw new Error(`Expect batchDims in the range of [-${indicesRank}, ${indicesRank}], but got ${batchDims}`);
        }
    }
    if (batchDims < 0) {
        batchDims += indicesRank;
    }
    if (batchDims > xRank) {
        throw new Error(`batchDims (${batchDims}) must be less than rank(x) (
    ${xRank}).`);
    }
    if (axis < batchDims) {
        throw new Error(`batchDims (${batchDims}) must be less than or equal to axis (${axis}).`);
    }
    for (let i = 0; i < batchDims; ++i) {
        if (x.shape[i] !== indices.shape[i]) {
            throw new Error(`x.shape[${i}]: ${x.shape[i]} should be equal to indices.shape[${i}]: ${indices.shape[i]}.`);
        }
    }
    const dimSize = x.shape[axis];
    const outputShape = [];
    let batchSize = 1;
    let outerSize = 1;
    let sliceSize = 1;
    for (let i = 0; i < batchDims; ++i) {
        outputShape.push(x.shape[i]);
        batchSize *= x.shape[i];
    }
    for (let i = batchDims; i < axis; i++) {
        outputShape.push(x.shape[i]);
        outerSize *= x.shape[i];
    }
    for (let i = batchDims; i < indicesRank; i++) {
        outputShape.push(indices.shape[i]);
    }
    for (let i = axis + 1; i < xRank; i++) {
        outputShape.push(x.shape[i]);
        sliceSize *= x.shape[i];
    }
    return { batchSize, sliceSize, outerSize, dimSize, outputShape };
}
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All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\n\nimport { TensorInfo } from '../tensor_info';\nimport {nearestDivisor} from '../util';\n\nimport {PARALLELIZE_THRESHOLD} from './reduce_util';\n\nexport interface SegOpInfo {\n  windowSize: number;\n  batchSize: number;\n  inSize: number;\n  numSegments: number;\n}\n\nexport function segOpComputeOptimalWindowSize(\n    inSize: number, numSegments: number): number {\n  let done = false;\n  let res;\n\n  if (inSize <= PARALLELIZE_THRESHOLD) {\n    res = inSize;\n    done = true;\n  } else {\n    res = nearestDivisor(inSize, Math.floor(Math.sqrt(inSize)));\n  }\n\n  while (!done) {\n    if (res > numSegments || res === inSize) {\n      done = true;\n    } else {\n      res = nearestDivisor(inSize, res + 1);\n    }\n  }\n  return res;\n}\n\nexport function computeOutShape(\n    aShape: number[], axis: number, numSegments: number): number[] {\n  const outShape = [];\n  const rank = aShape.length;\n  for (let dim = 0; dim < rank; dim++) {\n    if (dim !== axis) {\n      outShape.push(aShape[dim]);\n    } else {\n      outShape.push(numSegments);\n    }\n  }\n  return outShape;\n}\n\nexport interface GatherOpShapeInfo {\n  batchSize: number;\n  sliceSize: number;\n  outerSize: number;\n  dimSize: number;\n  outputShape: number[];\n}\n\nexport function collectGatherOpShapeInfo(\n    x: TensorInfo, indices: TensorInfo, axis: number,\n    batchDims: number): GatherOpShapeInfo {\n  const indicesRank = indices.shape.length;\n  const xRank = x.shape.length;\n\n  if (batchDims !== 0) {\n    if (batchDims < -indicesRank || batchDims > indicesRank) {\n      throw new Error(`Expect batchDims in the range of [-${indicesRank}, ${\n          indicesRank}], but got ${batchDims}`);\n    }\n  }\n\n  if (batchDims < 0) {\n    batchDims += indicesRank;\n  }\n\n  if (batchDims > xRank) {\n    throw new Error(`batchDims (${batchDims}) must be less than rank(x) (\n    ${xRank}).`);\n  }\n\n  if (axis < batchDims) {\n    throw new Error(`batchDims (${\n        batchDims}) must be less than or equal to axis (${axis}).`);\n  }\n\n  for (let i = 0; i < batchDims; ++i) {\n    if (x.shape[i] !== indices.shape[i]) {\n      throw new Error(\n          `x.shape[${i}]: ${x.shape[i]} should be equal to indices.shape[${\n              i}]: ${indices.shape[i]}.`);\n    }\n  }\n  const dimSize = x.shape[axis];\n\n  const outputShape: number[] = [];\n  let batchSize = 1;\n  let outerSize = 1;\n  let sliceSize = 1;\n\n  for (let i = 0; i < batchDims; ++i) {\n    outputShape.push(x.shape[i]);\n    batchSize *= x.shape[i];\n  }\n\n  for (let i = batchDims; i < axis; i++) {\n    outputShape.push(x.shape[i]);\n    outerSize *= x.shape[i];\n  }\n\n  for (let i = batchDims; i < indicesRank; i++) {\n    outputShape.push(indices.shape[i]);\n  }\n\n  for (let i = axis + 1; i < xRank; i++) {\n    outputShape.push(x.shape[i]);\n    sliceSize *= x.shape[i];\n  }\n\n  return {batchSize, sliceSize, outerSize, dimSize, outputShape};\n}\n"]}