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authorlittleblack111 <littleblack11111@gmail.com>2026-05-18 23:10:59 +0800
committerlittleblack111 <littleblack11111@gmail.com>2026-05-18 23:41:44 +0800
commitfc87c009806dcc98867f6b58efe29b042aa01dee (patch)
tree8f59b3f4a5b66e9dfef2d40c8d318e258a521228 /node_modules/webpack/lib/util/binarySearchBounds.js
parent3336b2356ee6152d9c6ae59bd9b87ccbc0958407 (diff)
node: updatemain
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-rw-r--r--node_modules/webpack/lib/util/binarySearchBounds.js128
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diff --git a/node_modules/webpack/lib/util/binarySearchBounds.js b/node_modules/webpack/lib/util/binarySearchBounds.js
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-/*
- MIT License http://www.opensource.org/licenses/mit-license.php
- Author Mikola Lysenko @mikolalysenko
-*/
-
-"use strict";
-
-/* cspell:disable-next-line */
-// Refactor: Peter Somogyvari @petermetz
-
-/** @typedef {">=" | "<=" | "<" | ">" | "-" } BinarySearchPredicate */
-/** @typedef {"GE" | "GT" | "LT" | "LE" | "EQ" } SearchPredicateSuffix */
-
-/**
- * Helper function for compiling binary search functions.
- *
- * The generated code uses a while loop to repeatedly divide the search interval
- * in half until the desired element is found, or the search interval is empty.
- *
- * The following is an example of a generated function for calling `compileSearch("P", "c(x,y)<=0", true, ["y", "c"], false)`:
- *
- * ```js
- * function P(a,l,h,y,c){var i=l-1;while(l<=h){var m=(l+h)>>>1,x=a[m];if(c(x,y)<=0){i=m;l=m+1}else{h=m-1}}return i};
- * ```
- * @param {string} funcName The name of the function to be compiled.
- * @param {string} predicate The predicate / comparison operator to be used in the binary search.
- * @param {boolean} reversed Whether the search should be reversed.
- * @param {string[]} extraArgs Extra arguments to be passed to the function.
- * @param {boolean=} earlyOut Whether the search should return as soon as a match is found.
- * @returns {string} The compiled binary search function.
- */
-const compileSearch = (funcName, predicate, reversed, extraArgs, earlyOut) => {
- const code = [
- "function ",
- funcName,
- "(a,l,h,",
- extraArgs.join(","),
- "){",
- earlyOut ? "" : "var i=",
- reversed ? "l-1" : "h+1",
- ";while(l<=h){var m=(l+h)>>>1,x=a[m]"
- ];
-
- if (earlyOut) {
- if (!predicate.includes("c")) {
- code.push(";if(x===y){return m}else if(x<=y){");
- } else {
- code.push(";var p=c(x,y);if(p===0){return m}else if(p<=0){");
- }
- } else {
- code.push(";if(", predicate, "){i=m;");
- }
- if (reversed) {
- code.push("l=m+1}else{h=m-1}");
- } else {
- code.push("h=m-1}else{l=m+1}");
- }
- code.push("}");
- if (earlyOut) {
- code.push("return -1};");
- } else {
- code.push("return i};");
- }
- return code.join("");
-};
-
-/**
- * This helper functions generate code for two binary search functions:
- * A(): Performs a binary search on an array using the comparison operator specified.
- * P(): Performs a binary search on an array using a _custom comparison function_
- * `c(x,y)` **and** comparison operator specified by `predicate`.
- * @param {BinarySearchPredicate} predicate The predicate / comparison operator to be used in the binary search.
- * @param {boolean} reversed Whether the search should be reversed.
- * @param {SearchPredicateSuffix} suffix The suffix to be used in the function name.
- * @param {boolean=} earlyOut Whether the search should return as soon as a match is found.
- * @returns {Function} The compiled binary search function.
- */
-const compileBoundsSearch = (predicate, reversed, suffix, earlyOut) => {
- const arg1 = compileSearch("A", `x${predicate}y`, reversed, ["y"], earlyOut);
-
- const arg2 = compileSearch(
- "P",
- `c(x,y)${predicate}0`,
- reversed,
- ["y", "c"],
- earlyOut
- );
-
- const fnHeader = "function dispatchBinarySearch";
-
- const fnBody =
- // eslint-disable-next-line no-multi-str
- "(a,y,c,l,h){\
-if(typeof(c)==='function'){\
-return P(a,(l===void 0)?0:l|0,(h===void 0)?a.length-1:h|0,y,c)\
-}else{\
-return A(a,(c===void 0)?0:c|0,(l===void 0)?a.length-1:l|0,y)\
-}}\
-return dispatchBinarySearch";
-
- const fnArgList = [arg1, arg2, fnHeader, suffix, fnBody, suffix];
- const fnSource = fnArgList.join("");
- // eslint-disable-next-line no-new-func
- const result = new Function(fnSource);
- return result();
-};
-
-/**
- * These functions are used to perform binary searches on arrays.
- * @example
- * ```js
- * const { gt, le} = require("./binarySearchBounds");
- * const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9];
- *
- * // Find the index of the first element greater than 5
- * const index1 = gt(arr, 5); // index1 === 3
- *
- * // Find the index of the first element less than or equal to 5
- * const index2 = le(arr, 5); // index2 === 4
- * ```
- */
-module.exports = {
- ge: compileBoundsSearch(">=", false, "GE"),
- gt: compileBoundsSearch(">", false, "GT"),
- lt: compileBoundsSearch("<", true, "LT"),
- le: compileBoundsSearch("<=", true, "LE"),
- eq: compileBoundsSearch("-", true, "EQ", true)
-};