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Joel Male
2022-11-10 20:43:16 +10:00
parent c9072d53a3
commit 29d4f522f2
5233 changed files with 476623 additions and 533020 deletions
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node_modules/diff-sequences/README.md
Generated Vendored
+11 -11
View File
@@ -187,17 +187,17 @@ const pushDelIns = (aLines, aIndex, aEnd, bLines, bIndex, bEnd, array) => {
const insertLines = bIndex !== bEnd;
const changeLines = deleteLines && insertLines;
if (changeLines) {
array.push(getRange(aIndex, aEnd) + 'c' + getRange(bIndex, bEnd));
array.push(`${getRange(aIndex, aEnd)}c${getRange(bIndex, bEnd)}`);
} else if (deleteLines) {
array.push(getRange(aIndex, aEnd) + 'd' + String(bIndex));
array.push(`${getRange(aIndex, aEnd)}d${String(bIndex)}`);
} else if (insertLines) {
array.push(String(aIndex) + 'a' + getRange(bIndex, bEnd));
array.push(`${String(aIndex)}a${getRange(bIndex, bEnd)}`);
} else {
return;
}
for (; aIndex !== aEnd; aIndex += 1) {
array.push('< ' + aLines[aIndex]); // delete is less than
array.push(`< ${aLines[aIndex]}`); // delete is less than
}
if (changeLines) {
@@ -205,7 +205,7 @@ const pushDelIns = (aLines, aIndex, aEnd, bLines, bIndex, bEnd, array) => {
}
for (; bIndex !== bEnd; bIndex += 1) {
array.push('> ' + bLines[bIndex]); // insert is greater than
array.push(`> ${bLines[bIndex]}`); // insert is greater than
}
};
@@ -232,7 +232,7 @@ const findShortestEditScript = (a, b) => {
// After the last common subsequence, push remaining change lines.
pushDelIns(aLines, aIndex, aLength, bLines, bIndex, bLength, array);
return array.length === 0 ? '' : array.join('\n') + '\n';
return array.length === 0 ? '' : `${array.join('\n')}\n`;
};
```
@@ -263,14 +263,14 @@ const formatDiffLines = (a, b) => {
const array = [];
const foundSubsequence = (nCommon, aCommon, bCommon) => {
for (; aIndex !== aCommon; aIndex += 1) {
array.push('-·' + aLinesIn[aIndex]); // delete is minus
array.push(`-·${aLinesIn[aIndex]}`); // delete is minus
}
for (; bIndex !== bCommon; bIndex += 1) {
array.push('+·' + bLinesIn[bIndex]); // insert is plus
array.push(`+·${bLinesIn[bIndex]}`); // insert is plus
}
for (; nCommon !== 0; nCommon -= 1, aIndex += 1, bIndex += 1) {
// For common lines, received indentation seems more intuitive.
array.push('··' + bLinesIn[bIndex]); // common is space
array.push(`··${bLinesIn[bIndex]}`); // common is space
}
};
@@ -278,10 +278,10 @@ const formatDiffLines = (a, b) => {
// After the last common subsequence, push remaining change lines.
for (; aIndex !== aLength; aIndex += 1) {
array.push('-·' + aLinesIn[aIndex]);
array.push(`-·${aLinesIn[aIndex]}`);
}
for (; bIndex !== bLength; bIndex += 1) {
array.push('+·' + bLinesIn[bIndex]);
array.push(`+·${bLinesIn[bIndex]}`);
}
return array;
node_modules/diff-sequences/build/index.d.ts
Generated Vendored
+31 -11
View File
@@ -1,3 +1,28 @@
/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
export declare type Callbacks = {
foundSubsequence: FoundSubsequence;
isCommon: IsCommon;
};
declare function diffSequence(
aLength: number,
bLength: number,
isCommon: IsCommon,
foundSubsequence: FoundSubsequence,
): void;
export default diffSequence;
declare type FoundSubsequence = (
nCommon: number, // caller can assume: 0 < nCommon
aCommon: number, // caller can assume: 0 <= aCommon && aCommon < aLength
bCommon: number,
) => void;
/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
@@ -5,14 +30,9 @@
* LICENSE file in the root directory of this source tree.
*
*/
declare type IsCommon = (aIndex: number, // caller can assume: 0 <= aIndex && aIndex < aLength
bIndex: number) => boolean;
declare type FoundSubsequence = (nCommon: number, // caller can assume: 0 < nCommon
aCommon: number, // caller can assume: 0 <= aCommon && aCommon < aLength
bCommon: number) => void;
export declare type Callbacks = {
foundSubsequence: FoundSubsequence;
isCommon: IsCommon;
};
declare const _default: (aLength: number, bLength: number, isCommon: IsCommon, foundSubsequence: FoundSubsequence) => void;
export default _default;
declare type IsCommon = (
aIndex: number, // caller can assume: 0 <= aIndex && aIndex < aLength
bIndex: number,
) => boolean;
export {};
node_modules/diff-sequences/build/index.js
Generated Vendored
+133 -133
View File
@@ -3,8 +3,7 @@
Object.defineProperty(exports, '__esModule', {
value: true
});
exports.default = void 0;
exports.default = diffSequence;
/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
@@ -12,8 +11,10 @@ exports.default = void 0;
* LICENSE file in the root directory of this source tree.
*
*/
// This diff-sequences package implements the linear space variation in
// An O(ND) Difference Algorithm and Its Variations by Eugene W. Myers
// Relationship in notation between Myers paper and this package:
// A is a
// N is aLength, aEnd - aStart, and so on
@@ -29,6 +30,7 @@ exports.default = void 0;
// index intervals [1, N] and [1, M] are [0, aLength) and [0, bLength)
// starting point in forward direction (0, 0) is (-1, -1)
// starting point in reverse direction (N + 1, M + 1) is (aLength, bLength)
// The “edit graph” for sequences a and b corresponds to items:
// in a on the horizontal axis
// in b on the vertical axis
@@ -44,6 +46,7 @@ exports.default = void 0;
// zero diagonal intersects bottom right corner
// positive diagonals intersect right edge
// negative diagonals intersect bottom edge
// The graph contains a directed acyclic graph of edges:
// horizontal: delete an item from a
// vertical: insert an item from b
@@ -52,69 +55,79 @@ exports.default = void 0;
// The algorithm solves dual problems in the graph analogy:
// Find longest common subsequence: path with maximum number of diagonal edges
// Find shortest edit script: path with minimum number of non-diagonal edges
// Input callback function compares items at indexes in the sequences.
// Output callback function receives the number of adjacent items
// and starting indexes of each common subsequence.
// Either original functions or wrapped to swap indexes if graph is transposed.
// Indexes in sequence a of last point of forward or reverse paths in graph.
// Myers algorithm indexes by diagonal k which for negative is bad deopt in V8.
// This package indexes by iF and iR which are greater than or equal to zero.
// and also updates the index arrays in place to cut memory in half.
// kF = 2 * iF - d
// kR = d - 2 * iR
// Division of index intervals in sequences a and b at the middle change.
// Invariant: intervals do not have common items at the start or end.
const pkg = 'diff-sequences'; // for error messages
const pkg = 'diff-sequences'; // for error messages
const NOT_YET_SET = 0; // small int instead of undefined to avoid deopt in V8
// Return the number of common items that follow in forward direction.
// The length of what Myers paper calls a “snake” in a forward path.
const countCommonItemsF = (aIndex, aEnd, bIndex, bEnd, isCommon) => {
let nCommon = 0;
while (aIndex < aEnd && bIndex < bEnd && isCommon(aIndex, bIndex)) {
aIndex += 1;
bIndex += 1;
nCommon += 1;
}
return nCommon;
}; // Return the number of common items that precede in reverse direction.
// The length of what Myers paper calls a “snake” in a reverse path.
};
// Return the number of common items that precede in reverse direction.
// The length of what Myers paper calls a “snake” in a reverse path.
const countCommonItemsR = (aStart, aIndex, bStart, bIndex, isCommon) => {
let nCommon = 0;
while (aStart <= aIndex && bStart <= bIndex && isCommon(aIndex, bIndex)) {
aIndex -= 1;
bIndex -= 1;
nCommon += 1;
}
return nCommon;
}; // A simple function to extend forward paths from (d - 1) to d changes
// when forward and reverse paths cannot yet overlap.
};
const extendPathsF = (d, aEnd, bEnd, bF, isCommon, aIndexesF, iMaxF) => {
// A simple function to extend forward paths from (d - 1) to d changes
// when forward and reverse paths cannot yet overlap.
const extendPathsF = (
d,
aEnd,
bEnd,
bF,
isCommon,
aIndexesF,
iMaxF // return the value because optimization might decrease it
) => {
// Unroll the first iteration.
let iF = 0;
let kF = -d; // kF = 2 * iF - d
let aFirst = aIndexesF[iF]; // in first iteration always insert
let aIndexPrev1 = aFirst; // prev value of [iF - 1] in next iteration
aIndexesF[iF] += countCommonItemsF(
aFirst + 1,
aEnd,
bF + aFirst - kF + 1,
bEnd,
isCommon
); // Optimization: skip diagonals in which paths cannot ever overlap.
);
const nF = d < iMaxF ? d : iMaxF; // The diagonals kF are odd when d is odd and even when d is even.
// Optimization: skip diagonals in which paths cannot ever overlap.
const nF = d < iMaxF ? d : iMaxF;
// The diagonals kF are odd when d is odd and even when d is even.
for (iF += 1, kF += 2; iF <= nF; iF += 1, kF += 2) {
// To get first point of path segment, move one change in forward direction
// from last point of previous path segment in an adjacent diagonal.
@@ -128,37 +141,45 @@ const extendPathsF = (d, aEnd, bEnd, bF, isCommon, aIndexesF, iMaxF) => {
// Optimization: delete moved past right of graph.
return iF - 1;
}
} // To get last point of path segment, move along diagonal of common items.
}
// To get last point of path segment, move along diagonal of common items.
aIndexPrev1 = aIndexesF[iF];
aIndexesF[iF] =
aFirst +
countCommonItemsF(aFirst + 1, aEnd, bF + aFirst - kF + 1, bEnd, isCommon);
}
return iMaxF;
}; // A simple function to extend reverse paths from (d - 1) to d changes
// when reverse and forward paths cannot yet overlap.
};
const extendPathsR = (d, aStart, bStart, bR, isCommon, aIndexesR, iMaxR) => {
// A simple function to extend reverse paths from (d - 1) to d changes
// when reverse and forward paths cannot yet overlap.
const extendPathsR = (
d,
aStart,
bStart,
bR,
isCommon,
aIndexesR,
iMaxR // return the value because optimization might decrease it
) => {
// Unroll the first iteration.
let iR = 0;
let kR = d; // kR = d - 2 * iR
let aFirst = aIndexesR[iR]; // in first iteration always insert
let aIndexPrev1 = aFirst; // prev value of [iR - 1] in next iteration
aIndexesR[iR] -= countCommonItemsR(
aStart,
aFirst - 1,
bStart,
bR + aFirst - kR - 1,
isCommon
); // Optimization: skip diagonals in which paths cannot ever overlap.
);
const nR = d < iMaxR ? d : iMaxR; // The diagonals kR are odd when d is odd and even when d is even.
// Optimization: skip diagonals in which paths cannot ever overlap.
const nR = d < iMaxR ? d : iMaxR;
// The diagonals kR are odd when d is odd and even when d is even.
for (iR += 1, kR -= 2; iR <= nR; iR += 1, kR -= 2) {
// To get first point of path segment, move one change in reverse direction
// from last point of previous path segment in an adjacent diagonal.
@@ -172,8 +193,9 @@ const extendPathsR = (d, aStart, bStart, bR, isCommon, aIndexesR, iMaxR) => {
// Optimization: delete moved past left of graph.
return iR - 1;
}
} // To get last point of path segment, move along diagonal of common items.
}
// To get last point of path segment, move along diagonal of common items.
aIndexPrev1 = aIndexesR[iR];
aIndexesR[iR] =
aFirst -
@@ -185,11 +207,11 @@ const extendPathsR = (d, aStart, bStart, bR, isCommon, aIndexesR, iMaxR) => {
isCommon
);
}
return iMaxR;
}; // A complete function to extend forward paths from (d - 1) to d changes.
// Return true if a path overlaps reverse path of (d - 1) changes in its diagonal.
};
// A complete function to extend forward paths from (d - 1) to d changes.
// Return true if a path overlaps reverse path of (d - 1) changes in its diagonal.
const extendOverlappablePathsF = (
d,
aStart,
@@ -201,24 +223,23 @@ const extendOverlappablePathsF = (
iMaxF,
aIndexesR,
iMaxR,
division
division // update prop values if return true
) => {
const bF = bStart - aStart; // bIndex = bF + aIndex - kF
const aLength = aEnd - aStart;
const bLength = bEnd - bStart;
const baDeltaLength = bLength - aLength; // kF = kR - baDeltaLength
// Range of diagonals in which forward and reverse paths might overlap.
const kMinOverlapF = -baDeltaLength - (d - 1); // -(d - 1) <= kR
const kMaxOverlapF = -baDeltaLength + (d - 1); // kR <= (d - 1)
let aIndexPrev1 = NOT_YET_SET; // prev value of [iF - 1] in next iteration
// Optimization: skip diagonals in which paths cannot ever overlap.
const nF = d < iMaxF ? d : iMaxF;
const nF = d < iMaxF ? d : iMaxF; // The diagonals kF = 2 * iF - d are odd when d is odd and even when d is even.
// The diagonals kF = 2 * iF - d are odd when d is odd and even when d is even.
for (let iF = 0, kF = -d; iF <= nF; iF += 1, kF += 2) {
// To get first point of path segment, move one change in forward direction
// from last point of previous path segment in an adjacent diagonal.
@@ -229,8 +250,8 @@ const extendOverlappablePathsF = (
const aFirst = insert
? aLastPrev // vertical to insert from b
: aLastPrev + 1; // horizontal to delete from a
// To get last point of path segment, move along diagonal of common items.
// To get last point of path segment, move along diagonal of common items.
const bFirst = bF + aFirst - kF;
const nCommonF = countCommonItemsF(
aFirst + 1,
@@ -242,22 +263,23 @@ const extendOverlappablePathsF = (
const aLast = aFirst + nCommonF;
aIndexPrev1 = aIndexesF[iF];
aIndexesF[iF] = aLast;
if (kMinOverlapF <= kF && kF <= kMaxOverlapF) {
// Solve for iR of reverse path with (d - 1) changes in diagonal kF:
// kR = kF + baDeltaLength
// kR = (d - 1) - 2 * iR
const iR = (d - 1 - (kF + baDeltaLength)) / 2; // If this forward path overlaps the reverse path in this diagonal,
// then this is the middle change of the index intervals.
const iR = (d - 1 - (kF + baDeltaLength)) / 2;
// If this forward path overlaps the reverse path in this diagonal,
// then this is the middle change of the index intervals.
if (iR <= iMaxR && aIndexesR[iR] - 1 <= aLast) {
// Unlike the Myers algorithm which finds only the middle “snake”
// this package can find two common subsequences per division.
// Last point of previous path segment is on an adjacent diagonal.
const bLastPrev = bF + aLastPrev - (insert ? kF + 1 : kF - 1); // Because of invariant that intervals preceding the middle change
const bLastPrev = bF + aLastPrev - (insert ? kF + 1 : kF - 1);
// Because of invariant that intervals preceding the middle change
// cannot have common items at the end,
// move in reverse direction along a diagonal of common items.
const nCommonR = countCommonItemsR(
aStart,
aLastPrev,
@@ -270,7 +292,6 @@ const extendOverlappablePathsF = (
const aEndPreceding = aIndexPrevFirst + 1;
const bEndPreceding = bIndexPrevFirst + 1;
division.nChangePreceding = d - 1;
if (d - 1 === aEndPreceding + bEndPreceding - aStart - bStart) {
// Optimization: number of preceding changes in forward direction
// is equal to number of items in preceding interval,
@@ -281,25 +302,19 @@ const extendOverlappablePathsF = (
division.aEndPreceding = aEndPreceding;
division.bEndPreceding = bEndPreceding;
}
division.nCommonPreceding = nCommonR;
if (nCommonR !== 0) {
division.aCommonPreceding = aEndPreceding;
division.bCommonPreceding = bEndPreceding;
}
division.nCommonFollowing = nCommonF;
if (nCommonF !== 0) {
division.aCommonFollowing = aFirst + 1;
division.bCommonFollowing = bFirst + 1;
}
const aStartFollowing = aLast + 1;
const bStartFollowing = bFirst + nCommonF + 1;
division.nChangeFollowing = d - 1;
if (d - 1 === aEnd + bEnd - aStartFollowing - bStartFollowing) {
// Optimization: number of changes in reverse direction
// is equal to number of items in following interval,
@@ -310,16 +325,15 @@ const extendOverlappablePathsF = (
division.aStartFollowing = aStartFollowing;
division.bStartFollowing = bStartFollowing;
}
return true;
}
}
}
return false;
}; // A complete function to extend reverse paths from (d - 1) to d changes.
// Return true if a path overlaps forward path of d changes in its diagonal.
};
// A complete function to extend reverse paths from (d - 1) to d changes.
// Return true if a path overlaps forward path of d changes in its diagonal.
const extendOverlappablePathsR = (
d,
aStart,
@@ -331,24 +345,23 @@ const extendOverlappablePathsR = (
iMaxF,
aIndexesR,
iMaxR,
division
division // update prop values if return true
) => {
const bR = bEnd - aEnd; // bIndex = bR + aIndex - kR
const aLength = aEnd - aStart;
const bLength = bEnd - bStart;
const baDeltaLength = bLength - aLength; // kR = kF + baDeltaLength
// Range of diagonals in which forward and reverse paths might overlap.
const kMinOverlapR = baDeltaLength - d; // -d <= kF
const kMaxOverlapR = baDeltaLength + d; // kF <= d
let aIndexPrev1 = NOT_YET_SET; // prev value of [iR - 1] in next iteration
// Optimization: skip diagonals in which paths cannot ever overlap.
const nR = d < iMaxR ? d : iMaxR;
const nR = d < iMaxR ? d : iMaxR; // The diagonals kR = d - 2 * iR are odd when d is odd and even when d is even.
// The diagonals kR = d - 2 * iR are odd when d is odd and even when d is even.
for (let iR = 0, kR = d; iR <= nR; iR += 1, kR -= 2) {
// To get first point of path segment, move one change in reverse direction
// from last point of previous path segment in an adjacent diagonal.
@@ -359,8 +372,8 @@ const extendOverlappablePathsR = (
const aFirst = insert
? aLastPrev // vertical to insert from b
: aLastPrev - 1; // horizontal to delete from a
// To get last point of path segment, move along diagonal of common items.
// To get last point of path segment, move along diagonal of common items.
const bFirst = bR + aFirst - kR;
const nCommonR = countCommonItemsR(
aStart,
@@ -372,18 +385,17 @@ const extendOverlappablePathsR = (
const aLast = aFirst - nCommonR;
aIndexPrev1 = aIndexesR[iR];
aIndexesR[iR] = aLast;
if (kMinOverlapR <= kR && kR <= kMaxOverlapR) {
// Solve for iF of forward path with d changes in diagonal kR:
// kF = kR - baDeltaLength
// kF = 2 * iF - d
const iF = (d + (kR - baDeltaLength)) / 2; // If this reverse path overlaps the forward path in this diagonal,
// then this is a middle change of the index intervals.
const iF = (d + (kR - baDeltaLength)) / 2;
// If this reverse path overlaps the forward path in this diagonal,
// then this is a middle change of the index intervals.
if (iF <= iMaxF && aLast - 1 <= aIndexesF[iF]) {
const bLast = bFirst - nCommonR;
division.nChangePreceding = d;
if (d === aLast + bLast - aStart - bStart) {
// Optimization: number of changes in reverse direction
// is equal to number of items in preceding interval,
@@ -394,17 +406,13 @@ const extendOverlappablePathsR = (
division.aEndPreceding = aLast;
division.bEndPreceding = bLast;
}
division.nCommonPreceding = nCommonR;
if (nCommonR !== 0) {
// The last point of reverse path segment is start of common subsequence.
division.aCommonPreceding = aLast;
division.bCommonPreceding = bLast;
}
division.nChangeFollowing = d - 1;
if (d === 1) {
// There is no previous path segment.
division.nCommonFollowing = 0;
@@ -414,10 +422,11 @@ const extendOverlappablePathsR = (
// Unlike the Myers algorithm which finds only the middle “snake”
// this package can find two common subsequences per division.
// Last point of previous path segment is on an adjacent diagonal.
const bLastPrev = bR + aLastPrev - (insert ? kR - 1 : kR + 1); // Because of invariant that intervals following the middle change
const bLastPrev = bR + aLastPrev - (insert ? kR - 1 : kR + 1);
// Because of invariant that intervals following the middle change
// cannot have common items at the start,
// move in forward direction along a diagonal of common items.
const nCommonF = countCommonItemsF(
aLastPrev,
aEnd,
@@ -426,15 +435,12 @@ const extendOverlappablePathsR = (
isCommon
);
division.nCommonFollowing = nCommonF;
if (nCommonF !== 0) {
// The last point of reverse path segment is start of common subsequence.
division.aCommonFollowing = aLastPrev;
division.bCommonFollowing = bLastPrev;
}
const aStartFollowing = aLastPrev + nCommonF; // aFirstPrev
const bStartFollowing = bLastPrev + nCommonF; // bFirstPrev
if (d - 1 === aEnd + bEnd - aStartFollowing - bStartFollowing) {
@@ -448,19 +454,18 @@ const extendOverlappablePathsR = (
division.bStartFollowing = bStartFollowing;
}
}
return true;
}
}
}
return false;
}; // Given index intervals and input function to compare items at indexes,
};
// Given index intervals and input function to compare items at indexes,
// divide at the middle change.
//
// DO NOT CALL if start === end, because interval cannot contain common items
// and because this function will throw the “no overlap” error.
const divide = (
nChange,
aStart,
@@ -473,34 +478,32 @@ const divide = (
division // output
) => {
const bF = bStart - aStart; // bIndex = bF + aIndex - kF
const bR = bEnd - aEnd; // bIndex = bR + aIndex - kR
const aLength = aEnd - aStart;
const bLength = bEnd - bStart; // Because graph has square or portrait orientation,
const bLength = bEnd - bStart;
// Because graph has square or portrait orientation,
// length difference is minimum number of items to insert from b.
// Corresponding forward and reverse diagonals in graph
// depend on length difference of the sequences:
// kF = kR - baDeltaLength
// kR = kF + baDeltaLength
const baDeltaLength = bLength - aLength;
const baDeltaLength = bLength - aLength; // Optimization: max diagonal in graph intersects corner of shorter side.
// Optimization: max diagonal in graph intersects corner of shorter side.
let iMaxF = aLength;
let iMaxR = aLength; // Initialize no changes yet in forward or reverse direction:
let iMaxR = aLength;
// Initialize no changes yet in forward or reverse direction:
aIndexesF[0] = aStart - 1; // at open start of interval, outside closed start
aIndexesR[0] = aEnd; // at open end of interval
if (baDeltaLength % 2 === 0) {
// The number of changes in paths is 2 * d if length difference is even.
const dMin = (nChange || baDeltaLength) / 2;
const dMax = (aLength + bLength) / 2;
for (let d = 1; d <= dMax; d += 1) {
iMaxF = extendPathsF(d, aEnd, bEnd, bF, isCommon, aIndexesF, iMaxF);
if (d < dMin) {
iMaxR = extendPathsR(d, aStart, bStart, bR, isCommon, aIndexesR, iMaxR);
} else if (
@@ -526,15 +529,15 @@ const divide = (
} else {
// The number of changes in paths is 2 * d - 1 if length difference is odd.
const dMin = ((nChange || baDeltaLength) + 1) / 2;
const dMax = (aLength + bLength + 1) / 2; // Unroll first half iteration so loop extends the relevant pairs of paths.
const dMax = (aLength + bLength + 1) / 2;
// Unroll first half iteration so loop extends the relevant pairs of paths.
// Because of invariant that intervals have no common items at start or end,
// and limitation not to call divide with empty intervals,
// therefore it cannot be called if a forward path with one change
// would overlap a reverse path with no changes, even if dMin === 1.
let d = 1;
iMaxF = extendPathsF(d, aEnd, bEnd, bF, isCommon, aIndexesF, iMaxF);
for (d += 1; d <= dMax; d += 1) {
iMaxR = extendPathsR(
d - 1,
@@ -545,7 +548,6 @@ const divide = (
aIndexesR,
iMaxR
);
if (d < dMin) {
iMaxF = extendPathsF(d, aEnd, bEnd, bF, isCommon, aIndexesF, iMaxF);
} else if (
@@ -569,19 +571,20 @@ const divide = (
}
}
}
/* istanbul ignore next */
/* istanbul ignore next */
throw new Error(
`${pkg}: no overlap aStart=${aStart} aEnd=${aEnd} bStart=${bStart} bEnd=${bEnd}`
);
}; // Given index intervals and input function to compare items at indexes,
};
// Given index intervals and input function to compare items at indexes,
// return by output function the number of adjacent items and starting indexes
// of each common subsequence. Divide and conquer with only linear space.
//
// The index intervals are half open [start, end) like array slice method.
// DO NOT CALL if start === end, because interval cannot contain common items
// and because divide function will throw the “no overlap” error.
const findSubsequences = (
nChange,
aStart,
@@ -598,7 +601,6 @@ const findSubsequences = (
// Transpose graph so it has portrait instead of landscape orientation.
// Always compare shorter to longer sequence for consistency and optimization.
transposed = !transposed;
if (transposed && callbacks.length === 1) {
// Lazily wrap callback functions to swap args if graph is transposed.
const {foundSubsequence, isCommon} = callbacks[0];
@@ -609,7 +611,6 @@ const findSubsequences = (
isCommon: (bIndex, aIndex) => isCommon(aIndex, bIndex)
};
}
const tStart = aStart;
const tEnd = aEnd;
aStart = bStart;
@@ -617,9 +618,9 @@ const findSubsequences = (
bStart = tStart;
bEnd = tEnd;
}
const {foundSubsequence, isCommon} = callbacks[transposed ? 1 : 0];
const {foundSubsequence, isCommon} = callbacks[transposed ? 1 : 0]; // Divide the index intervals at the middle change.
// Divide the index intervals at the middle change.
divide(
nChange,
aStart,
@@ -644,8 +645,9 @@ const findSubsequences = (
nChangeFollowing,
aStartFollowing,
bStartFollowing
} = division; // Unless either index interval is empty, they might contain common items.
} = division;
// Unless either index interval is empty, they might contain common items.
if (aStart < aEndPreceding && bStart < bEndPreceding) {
// Recursely find and return common subsequences preceding the division.
findSubsequences(
@@ -660,16 +662,17 @@ const findSubsequences = (
aIndexesR,
division
);
} // Return common subsequences that are adjacent to the middle change.
}
// Return common subsequences that are adjacent to the middle change.
if (nCommonPreceding !== 0) {
foundSubsequence(nCommonPreceding, aCommonPreceding, bCommonPreceding);
}
if (nCommonFollowing !== 0) {
foundSubsequence(nCommonFollowing, aCommonFollowing, bCommonFollowing);
} // Unless either index interval is empty, they might contain common items.
}
// Unless either index interval is empty, they might contain common items.
if (aStartFollowing < aEnd && bStartFollowing < bEnd) {
// Recursely find and return common subsequences following the division.
findSubsequences(
@@ -686,84 +689,83 @@ const findSubsequences = (
);
}
};
const validateLength = (name, arg) => {
if (typeof arg !== 'number') {
throw new TypeError(`${pkg}: ${name} typeof ${typeof arg} is not a number`);
}
if (!Number.isSafeInteger(arg)) {
throw new RangeError(`${pkg}: ${name} value ${arg} is not a safe integer`);
}
if (arg < 0) {
throw new RangeError(`${pkg}: ${name} value ${arg} is a negative integer`);
}
};
const validateCallback = (name, arg) => {
const type = typeof arg;
if (type !== 'function') {
throw new TypeError(`${pkg}: ${name} typeof ${type} is not a function`);
}
}; // Compare items in two sequences to find a longest common subsequence.
};
// Compare items in two sequences to find a longest common subsequence.
// Given lengths of sequences and input function to compare items at indexes,
// return by output function the number of adjacent items and starting indexes
// of each common subsequence.
var _default = (aLength, bLength, isCommon, foundSubsequence) => {
function diffSequence(aLength, bLength, isCommon, foundSubsequence) {
validateLength('aLength', aLength);
validateLength('bLength', bLength);
validateCallback('isCommon', isCommon);
validateCallback('foundSubsequence', foundSubsequence); // Count common items from the start in the forward direction.
validateCallback('foundSubsequence', foundSubsequence);
// Count common items from the start in the forward direction.
const nCommonF = countCommonItemsF(0, aLength, 0, bLength, isCommon);
if (nCommonF !== 0) {
foundSubsequence(nCommonF, 0, 0);
} // Unless both sequences consist of common items only,
// find common items in the half-trimmed index intervals.
}
// Unless both sequences consist of common items only,
// find common items in the half-trimmed index intervals.
if (aLength !== nCommonF || bLength !== nCommonF) {
// Invariant: intervals do not have common items at the start.
// The start of an index interval is closed like array slice method.
const aStart = nCommonF;
const bStart = nCommonF; // Count common items from the end in the reverse direction.
const bStart = nCommonF;
// Count common items from the end in the reverse direction.
const nCommonR = countCommonItemsR(
aStart,
aLength - 1,
bStart,
bLength - 1,
isCommon
); // Invariant: intervals do not have common items at the end.
// The end of an index interval is open like array slice method.
);
// Invariant: intervals do not have common items at the end.
// The end of an index interval is open like array slice method.
const aEnd = aLength - nCommonR;
const bEnd = bLength - nCommonR; // Unless one sequence consists of common items only,
const bEnd = bLength - nCommonR;
// Unless one sequence consists of common items only,
// therefore the other trimmed index interval consists of changes only,
// find common items in the trimmed index intervals.
const nCommonFR = nCommonF + nCommonR;
if (aLength !== nCommonFR && bLength !== nCommonFR) {
const nChange = 0; // number of change items is not yet known
const transposed = false; // call the original unwrapped functions
const callbacks = [
{
foundSubsequence,
isCommon
}
]; // Indexes in sequence a of last points in furthest reaching paths
];
// Indexes in sequence a of last points in furthest reaching paths
// from outside the start at top left in the forward direction:
const aIndexesF = [NOT_YET_SET];
// from the end at bottom right in the reverse direction:
const aIndexesR = [NOT_YET_SET];
const aIndexesF = [NOT_YET_SET]; // from the end at bottom right in the reverse direction:
const aIndexesR = [NOT_YET_SET]; // Initialize one object as output of all calls to divide function.
// Initialize one object as output of all calls to divide function.
const division = {
aCommonFollowing: NOT_YET_SET,
aCommonPreceding: NOT_YET_SET,
@@ -777,8 +779,9 @@ var _default = (aLength, bLength, isCommon, foundSubsequence) => {
nChangePreceding: NOT_YET_SET,
nCommonFollowing: NOT_YET_SET,
nCommonPreceding: NOT_YET_SET
}; // Find and return common subsequences in the trimmed index intervals.
};
// Find and return common subsequences in the trimmed index intervals.
findSubsequences(
nChange,
aStart,
@@ -792,11 +795,8 @@ var _default = (aLength, bLength, isCommon, foundSubsequence) => {
division
);
}
if (nCommonR !== 0) {
foundSubsequence(nCommonR, aEnd, bEnd);
}
}
};
exports.default = _default;
}
node_modules/diff-sequences/package.json
Generated Vendored
+13 -9
View File
@@ -1,6 +1,6 @@
{
"name": "diff-sequences",
"version": "26.6.2",
"version": "29.3.1",
"repository": {
"type": "git",
"url": "https://github.com/facebook/jest.git",
@@ -16,20 +16,24 @@
"diff"
],
"engines": {
"node": ">= 10.14.2"
"node": "^14.15.0 || ^16.10.0 || >=18.0.0"
},
"main": "build/index.js",
"types": "build/index.d.ts",
"scripts": {
"perf": "node --expose-gc perf/index.js"
"main": "./build/index.js",
"types": "./build/index.d.ts",
"exports": {
".": {
"types": "./build/index.d.ts",
"default": "./build/index.js"
},
"./package.json": "./package.json"
},
"devDependencies": {
"@fast-check/jest": "^1.3.0",
"benchmark": "^2.1.4",
"diff": "^4.0.1",
"fast-check": "^2.0.0"
"diff": "^5.0.0"
},
"publishConfig": {
"access": "public"
},
"gitHead": "4c46930615602cbf983fb7e8e82884c282a624d5"
"gitHead": "05deb8393c4ad71e19be2567b704dfd3a2ab5fc9"
}
node_modules/diff-sequences/perf/example.md
Generated Vendored
-48
View File
@@ -1,48 +0,0 @@
## Benchmark time for `diff-sequences` versus `diff`
A ratio less than 1.0 means `diff-sequences` is faster.
### n = 20
| name | % | ratio | improved | rme | baseline | rme |
| :----- | ---: | :----- | :-------- | ----: | :-------- | ----: |
| delete | 20% | 0.1824 | 3.0639e-6 | 1.11% | 1.6795e-5 | 0.78% |
| insert | 20% | 0.1367 | 2.5786e-6 | 0.75% | 1.8866e-5 | 0.85% |
| delete | 40% | 0.1015 | 3.0534e-6 | 1.00% | 3.0090e-5 | 0.70% |
| insert | 40% | 0.0791 | 2.6722e-6 | 0.61% | 3.3791e-5 | 0.56% |
| delete | 80% | 0.0410 | 2.8870e-6 | 0.93% | 7.0411e-5 | 0.72% |
| insert | 80% | 0.0371 | 2.5786e-6 | 0.83% | 6.9431e-5 | 0.62% |
| change | 10% | 0.1504 | 2.8703e-6 | 0.71% | 1.9087e-5 | 0.83% |
| change | 20% | 0.1706 | 3.2637e-6 | 0.78% | 1.9127e-5 | 0.62% |
| change | 50% | 0.0944 | 1.2012e-5 | 0.55% | 1.2724e-4 | 0.76% |
| change | 100% | 0.0522 | 1.5422e-5 | 0.61% | 2.9566e-4 | 0.66% |
### n = 200
| name | % | ratio | improved | rme | baseline | rme |
| :----- | ---: | :----- | :-------- | ----: | :-------- | ----: |
| delete | 20% | 0.1524 | 7.2866e-5 | 0.75% | 4.7797e-4 | 0.80% |
| insert | 20% | 0.1226 | 6.1561e-5 | 0.58% | 5.0198e-4 | 0.66% |
| delete | 40% | 0.1118 | 1.5674e-4 | 0.67% | 1.4020e-3 | 0.58% |
| insert | 40% | 0.0894 | 1.2906e-4 | 0.64% | 1.4435e-3 | 0.53% |
| delete | 80% | 0.0796 | 3.0119e-4 | 0.58% | 3.7852e-3 | 0.52% |
| insert | 80% | 0.0734 | 2.4713e-4 | 0.67% | 3.3653e-3 | 0.54% |
| change | 10% | 0.1572 | 7.2965e-5 | 0.48% | 4.6426e-4 | 0.73% |
| change | 20% | 0.1446 | 7.0056e-5 | 0.69% | 4.8456e-4 | 0.53% |
| change | 50% | 0.0764 | 6.5638e-4 | 0.67% | 8.5946e-3 | 0.70% |
| change | 100% | 0.0525 | 1.1160e-3 | 0.51% | 2.1249e-2 | 0.63% |
### n = 2000
| name | % | ratio | improved | rme | baseline | rme |
| :----- | ---: | :----- | :-------- | ----: | :-------- | ----: |
| delete | 20% | 0.0669 | 3.4073e-3 | 0.54% | 5.0922e-2 | 0.54% |
| insert | 20% | 0.0588 | 2.8273e-3 | 0.51% | 4.8111e-2 | 0.46% |
| delete | 40% | 0.0517 | 1.1048e-2 | 0.52% | 2.1367e-1 | 0.47% |
| insert | 40% | 0.0460 | 9.1469e-3 | 0.37% | 1.9878e-1 | 0.26% |
| delete | 80% | 0.0563 | 2.7426e-2 | 0.56% | 4.8674e-1 | 0.36% |
| insert | 80% | 0.0506 | 2.2208e-2 | 0.35% | 4.3888e-1 | 0.47% |
| change | 10% | 0.0716 | 3.1267e-3 | 1.21% | 4.3652e-2 | 0.56% |
| change | 20% | 0.0621 | 3.0197e-3 | 0.72% | 4.8652e-2 | 0.45% |
| change | 50% | 0.0083 | 5.4250e-2 | 0.62% | 6.5595e+0 | 3.60% |
| change | 100% | 0.0493 | 1.0534e-1 | 0.71% | 2.1362e+0 | 0.21% |
node_modules/diff-sequences/perf/index.js
Generated Vendored
-170
View File
@@ -1,170 +0,0 @@
/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
// Make sure to run node with --expose-gc option!
// The times are reliable if about 1% relative mean error if you run it:
// * immediately after restart
// * with 100% battery charge
// * not connected to network
/* eslint import/no-extraneous-dependencies: "off" */
const Benchmark = require('benchmark');
const diffBaseline = require('diff').diffLines;
const diffImproved = require('../build/index.js').default;
const testBaseline = (a, b) => {
const benchmark = new Benchmark({
fn() {
diffBaseline(a, b);
},
name: 'baseline',
onCycle() {
global.gc(); // after run cycle
},
onStart() {
global.gc(); // when benchmark starts
},
});
benchmark.run({async: false});
return benchmark.stats;
};
const testImproved = function (a, b) {
const benchmark = new Benchmark({
fn() {
// Split string arguments to make fair comparison with baseline.
const aItems = a.split('\n');
const bItems = b.split('\n');
const isCommon = (aIndex, bIndex) => aItems[aIndex] === bItems[bIndex];
// This callback obviously does less than baseline `diff` package,
// but avoiding double work and memory churn is the goal.
// For example, `jest-diff` has had to split strings that `diff` joins.
const foundSubsequence = () => {};
diffImproved(aItems.length, bItems.length, isCommon, foundSubsequence);
},
name: 'improved',
onCycle() {
global.gc(); // after run cycle
},
onStart() {
global.gc(); // when benchmark starts
},
});
benchmark.run({async: false});
return benchmark.stats;
};
const writeHeading2 = () => {
console.log('## Benchmark time for `diff-sequences` versus `diff`\n');
console.log('A ratio less than 1.0 means `diff-sequences` is faster.');
};
const writeHeading3 = n => {
console.log(`\n### n = ${n}\n`);
console.log('| name | % | ratio | improved | rme | baseline | rme |');
console.log('| :--- | ---: | :--- | :--- | ---: | :--- | ---: |');
};
const writeRow = (name, percent, statsImproved, statsBaseline) => {
const {mean: meanImproved, rme: rmeImproved} = statsImproved;
const {mean: meanBaseline, rme: rmeBaseline} = statsBaseline;
const ratio = meanImproved / meanBaseline;
console.log(
`| ${name} | ${percent}% | ${ratio.toFixed(
4,
)} | ${meanImproved.toExponential(4)} | ${rmeImproved.toFixed(
2,
)}% | ${meanBaseline.toExponential(4)} | ${rmeBaseline.toFixed(2)}% |`,
);
};
const testDeleteInsert = (tenths, more, less) => {
// For improved `diff-sequences` package, delete is often slower than insert.
const statsDeleteImproved = testImproved(more, less);
const statsDeleteBaseline = testBaseline(more, less);
writeRow('delete', tenths * 10, statsDeleteImproved, statsDeleteBaseline);
// For baseline `diff` package, many insertions is serious perf problem.
// However, the benchmark package cannot accurately measure for large n.
const statsInsertBaseline = testBaseline(less, more);
const statsInsertImproved = testImproved(less, more);
writeRow('insert', tenths * 10, statsInsertImproved, statsInsertBaseline);
};
const testChange = (tenths, expected, received) => {
const statsImproved = testImproved(expected, received);
const statsBaseline = testBaseline(expected, received);
writeRow('change', tenths * 10, statsImproved, statsBaseline);
};
const getItems = (n, callback) => {
const items = [];
for (let i = 0; i !== n; i += 1) {
const item = callback(i);
if (typeof item === 'string') {
items.push(item);
}
}
return items.join('\n');
};
// Simulate change of property name which is usually not same line.
// Expected: 0 1 2 3 4 5 6 7 8 9 and so on
// Received: 1 2 3 4 x0 5 6 7 8 9 and so on
const change2 = i => {
const j = i % 10;
return j === 4 ? `x${i - 4}` : j < 4 ? `${i + 1}` : `${i}`;
};
const testLength = n => {
const all = getItems(n, i => `${i}`);
writeHeading3(n);
[2, 4, 8].forEach(tenth => {
testDeleteInsert(
tenth,
all,
getItems(n, i => i % 10 >= tenth && `${i}`),
);
});
testChange(
1,
all,
getItems(n, i => (i % 10 === 0 ? `x${i}` : `${i}`)),
);
testChange(2, all, getItems(n, change2));
testChange(
5,
all,
getItems(n, i => (i % 2 === 0 ? `x${i}` : `${i}`)),
);
testChange(
10,
all,
getItems(n, i => `x${i}`),
); // simulate TDD
};
writeHeading2();
testLength(20);
testLength(200);
testLength(2000);