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2025-06-12 7b72ac13a83764a662159d4a49b7fffb90476ecb
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/**
 * @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 { computeStrides, isString, rightPad, sizeFromShape } from './util';
// Maximum number of values before we decide to show ellipsis.
const FORMAT_LIMIT_NUM_VALS = 20;
// Number of first and last values to show when displaying a, b,...,y, z.
const FORMAT_NUM_FIRST_LAST_VALS = 3;
// Number of significant digits to show.
const FORMAT_NUM_SIG_DIGITS = 7;
export function tensorToString(vals, shape, dtype, verbose) {
    const strides = computeStrides(shape);
    const padPerCol = computeMaxSizePerColumn(vals, shape, dtype, strides);
    const rank = shape.length;
    const valsLines = subTensorToString(vals, shape, dtype, strides, padPerCol);
    const lines = ['Tensor'];
    if (verbose) {
        lines.push(`  dtype: ${dtype}`);
        lines.push(`  rank: ${rank}`);
        lines.push(`  shape: [${shape}]`);
        lines.push(`  values:`);
    }
    lines.push(valsLines.map(l => '    ' + l).join('\n'));
    return lines.join('\n');
}
function computeMaxSizePerColumn(vals, shape, dtype, strides) {
    const n = sizeFromShape(shape);
    const numCols = strides[strides.length - 1];
    const padPerCol = new Array(numCols).fill(0);
    const rank = shape.length;
    const valuesOrTuples = dtype === 'complex64' ? createComplexTuples(vals) : vals;
    if (rank > 1) {
        for (let row = 0; row < n / numCols; row++) {
            const offset = row * numCols;
            for (let j = 0; j < numCols; j++) {
                padPerCol[j] = Math.max(padPerCol[j], valToString(valuesOrTuples[offset + j], 0, dtype).length);
            }
        }
    }
    return padPerCol;
}
function valToString(val, pad, dtype) {
    let valStr;
    if (Array.isArray(val)) {
        valStr = `${parseFloat(val[0].toFixed(FORMAT_NUM_SIG_DIGITS))} + ` +
            `${parseFloat(val[1].toFixed(FORMAT_NUM_SIG_DIGITS))}j`;
    }
    else if (isString(val)) {
        valStr = `'${val}'`;
    }
    else if (dtype === 'bool') {
        valStr = boolNumToString(val);
    }
    else {
        valStr = parseFloat(val.toFixed(FORMAT_NUM_SIG_DIGITS)).toString();
    }
    return rightPad(valStr, pad);
}
function boolNumToString(v) {
    return v === 0 ? 'false' : 'true';
}
function subTensorToString(vals, shape, dtype, strides, padPerCol, isLast = true) {
    const storagePerElement = dtype === 'complex64' ? 2 : 1;
    const size = shape[0];
    const rank = shape.length;
    if (rank === 0) {
        if (dtype === 'complex64') {
            const complexTuple = createComplexTuples(vals);
            return [valToString(complexTuple[0], 0, dtype)];
        }
        if (dtype === 'bool') {
            return [boolNumToString(vals[0])];
        }
        return [vals[0].toString()];
    }
    if (rank === 1) {
        if (size > FORMAT_LIMIT_NUM_VALS) {
            const firstValsSize = FORMAT_NUM_FIRST_LAST_VALS * storagePerElement;
            let firstVals = Array.from(vals.slice(0, firstValsSize));
            let lastVals = Array.from(vals.slice((size - FORMAT_NUM_FIRST_LAST_VALS) * storagePerElement, size * storagePerElement));
            if (dtype === 'complex64') {
                firstVals = createComplexTuples(firstVals);
                lastVals = createComplexTuples(lastVals);
            }
            return [
                '[' +
                    firstVals.map((x, i) => valToString(x, padPerCol[i], dtype))
                        .join(', ') +
                    ', ..., ' +
                    lastVals
                        .map((x, i) => valToString(x, padPerCol[size - FORMAT_NUM_FIRST_LAST_VALS + i], dtype))
                        .join(', ') +
                    ']'
            ];
        }
        const displayVals = dtype === 'complex64' ? createComplexTuples(vals) :
            Array.from(vals);
        return [
            '[' +
                displayVals.map((x, i) => valToString(x, padPerCol[i], dtype))
                    .join(', ') +
                ']'
        ];
    }
    // The array is rank 2 or more.
    const subshape = shape.slice(1);
    const substrides = strides.slice(1);
    const stride = strides[0] * storagePerElement;
    const lines = [];
    if (size > FORMAT_LIMIT_NUM_VALS) {
        for (let i = 0; i < FORMAT_NUM_FIRST_LAST_VALS; i++) {
            const start = i * stride;
            const end = start + stride;
            lines.push(...subTensorToString(vals.slice(start, end), subshape, dtype, substrides, padPerCol, false /* isLast */));
        }
        lines.push('...');
        for (let i = size - FORMAT_NUM_FIRST_LAST_VALS; i < size; i++) {
            const start = i * stride;
            const end = start + stride;
            lines.push(...subTensorToString(vals.slice(start, end), subshape, dtype, substrides, padPerCol, i === size - 1 /* isLast */));
        }
    }
    else {
        for (let i = 0; i < size; i++) {
            const start = i * stride;
            const end = start + stride;
            lines.push(...subTensorToString(vals.slice(start, end), subshape, dtype, substrides, padPerCol, i === size - 1 /* isLast */));
        }
    }
    const sep = rank === 2 ? ',' : '';
    lines[0] = '[' + (size > 0 ? lines[0] + sep : '');
    for (let i = 1; i < lines.length - 1; i++) {
        lines[i] = ' ' + lines[i] + sep;
    }
    let newLineSep = ',\n';
    for (let i = 2; i < rank; i++) {
        newLineSep += '\n';
    }
    lines[lines.length - 1] =
        ' ' + lines[lines.length - 1] + ']' + (isLast ? '' : newLineSep);
    return lines;
}
function createComplexTuples(vals) {
    const complexTuples = [];
    for (let i = 0; i < vals.length; i += 2) {
        complexTuples.push([vals[i], vals[i + 1]]);
    }
    return complexTuples;
}
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* @license\n * Copyright 2018 Google LLC. 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 {DataType, TypedArray} from './types';\nimport {computeStrides, isString, rightPad, sizeFromShape} from './util';\n\n// Maximum number of values before we decide to show ellipsis.\nconst FORMAT_LIMIT_NUM_VALS = 20;\n// Number of first and last values to show when displaying a, b,...,y, z.\nconst FORMAT_NUM_FIRST_LAST_VALS = 3;\n// Number of significant digits to show.\nconst FORMAT_NUM_SIG_DIGITS = 7;\n\nexport function tensorToString(\n    vals: TypedArray|string[], shape: number[], dtype: DataType,\n    verbose: boolean) {\n  const strides = computeStrides(shape);\n  const padPerCol = computeMaxSizePerColumn(vals, shape, dtype, strides);\n  const rank = shape.length;\n  const valsLines = subTensorToString(vals, shape, dtype, strides, padPerCol);\n  const lines = ['Tensor'];\n  if (verbose) {\n    lines.push(`  dtype: ${dtype}`);\n    lines.push(`  rank: ${rank}`);\n    lines.push(`  shape: [${shape}]`);\n    lines.push(`  values:`);\n  }\n  lines.push(valsLines.map(l => '    ' + l).join('\\n'));\n  return lines.join('\\n');\n}\n\nfunction computeMaxSizePerColumn(\n    vals: TypedArray|string[], shape: number[], dtype: DataType,\n    strides: number[]): number[] {\n  const n = sizeFromShape(shape);\n  const numCols = strides[strides.length - 1];\n  const padPerCol = new Array(numCols).fill(0);\n  const rank = shape.length;\n  const valuesOrTuples =\n      dtype === 'complex64' ? createComplexTuples(vals) : vals;\n\n  if (rank > 1) {\n    for (let row = 0; row < n / numCols; row++) {\n      const offset = row * numCols;\n      for (let j = 0; j < numCols; j++) {\n        padPerCol[j] = Math.max(\n            padPerCol[j],\n            valToString(valuesOrTuples[offset + j], 0, dtype).length);\n      }\n    }\n  }\n  return padPerCol;\n}\n\nfunction valToString(\n    val: number|string|[number, number], pad: number, dtype: DataType) {\n  let valStr: string;\n  if (Array.isArray(val)) {\n    valStr = `${parseFloat(val[0].toFixed(FORMAT_NUM_SIG_DIGITS))} + ` +\n        `${parseFloat(val[1].toFixed(FORMAT_NUM_SIG_DIGITS))}j`;\n  } else if (isString(val)) {\n    valStr = `'${val}'`;\n  } else if (dtype === 'bool') {\n    valStr = boolNumToString(val);\n  } else {\n    valStr = parseFloat(val.toFixed(FORMAT_NUM_SIG_DIGITS)).toString();\n  }\n\n  return rightPad(valStr, pad);\n}\n\nfunction boolNumToString(v: number): string {\n  return v === 0 ? 'false' : 'true';\n}\n\nfunction subTensorToString(\n    vals: TypedArray|string[], shape: number[], dtype: DataType,\n    strides: number[], padPerCol: number[], isLast = true): string[] {\n  const storagePerElement = dtype === 'complex64' ? 2 : 1;\n\n  const size = shape[0];\n  const rank = shape.length;\n  if (rank === 0) {\n    if (dtype === 'complex64') {\n      const complexTuple = createComplexTuples(vals);\n      return [valToString(complexTuple[0], 0, dtype)];\n    }\n    if (dtype === 'bool') {\n      return [boolNumToString(vals[0] as number)];\n    }\n    return [vals[0].toString()];\n  }\n\n  if (rank === 1) {\n    if (size > FORMAT_LIMIT_NUM_VALS) {\n      const firstValsSize = FORMAT_NUM_FIRST_LAST_VALS * storagePerElement;\n\n      let firstVals = Array.from<number|string|[number, number]>(\n          vals.slice(0, firstValsSize));\n      let lastVals = Array.from<number|string|[number, number]>(vals.slice(\n          (size - FORMAT_NUM_FIRST_LAST_VALS) * storagePerElement,\n          size * storagePerElement));\n      if (dtype === 'complex64') {\n        firstVals = createComplexTuples(firstVals);\n        lastVals = createComplexTuples(lastVals);\n      }\n      return [\n        '[' +\n        firstVals.map((x, i) => valToString(x, padPerCol[i], dtype))\n            .join(', ') +\n        ', ..., ' +\n        lastVals\n            .map(\n                (x, i) => valToString(\n                    x, padPerCol[size - FORMAT_NUM_FIRST_LAST_VALS + i], dtype))\n            .join(', ') +\n        ']'\n      ];\n    }\n    const displayVals: Array<number|string|[number, number]> =\n        dtype === 'complex64' ? createComplexTuples(vals) :\n                                Array.from<number|string>(vals);\n\n    return [\n      '[' +\n      displayVals.map((x, i) => valToString(x, padPerCol[i], dtype))\n          .join(', ') +\n      ']'\n    ];\n  }\n\n  // The array is rank 2 or more.\n  const subshape = shape.slice(1);\n  const substrides = strides.slice(1);\n  const stride = strides[0] * storagePerElement;\n  const lines: string[] = [];\n  if (size > FORMAT_LIMIT_NUM_VALS) {\n    for (let i = 0; i < FORMAT_NUM_FIRST_LAST_VALS; i++) {\n      const start = i * stride;\n      const end = start + stride;\n      lines.push(...subTensorToString(\n          vals.slice(start, end), subshape, dtype, substrides, padPerCol,\n          false /* isLast */));\n    }\n    lines.push('...');\n    for (let i = size - FORMAT_NUM_FIRST_LAST_VALS; i < size; i++) {\n      const start = i * stride;\n      const end = start + stride;\n      lines.push(...subTensorToString(\n          vals.slice(start, end), subshape, dtype, substrides, padPerCol,\n          i === size - 1 /* isLast */));\n    }\n  } else {\n    for (let i = 0; i < size; i++) {\n      const start = i * stride;\n      const end = start + stride;\n      lines.push(...subTensorToString(\n          vals.slice(start, end), subshape, dtype, substrides, padPerCol,\n          i === size - 1 /* isLast */));\n    }\n  }\n  const sep = rank === 2 ? ',' : '';\n  lines[0] = '[' + (size > 0 ? lines[0] + sep : '');\n  for (let i = 1; i < lines.length - 1; i++) {\n    lines[i] = ' ' + lines[i] + sep;\n  }\n  let newLineSep = ',\\n';\n  for (let i = 2; i < rank; i++) {\n    newLineSep += '\\n';\n  }\n  lines[lines.length - 1] =\n      ' ' + lines[lines.length - 1] + ']' + (isLast ? '' : newLineSep);\n  return lines;\n}\n\nfunction createComplexTuples(vals: Array<{}>|\n                             TypedArray): Array<[number, number]> {\n  const complexTuples: Array<[number, number]> = [];\n  for (let i = 0; i < vals.length; i += 2) {\n    complexTuples.push([vals[i], vals[i + 1]] as [number, number]);\n  }\n  return complexTuples;\n}\n"]}