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authorlittleblack111 <littleblack11111@gmail.com>2023-10-31 15:37:35 +0800
committerlittleblack111 <littleblack11111@gmail.com>2023-10-31 15:37:35 +0800
commitd5f14083061f2ce6a42313188443a42e30796320 (patch)
treecc6a9889e08b29595a76a33b9e7b4ef84866468b /node_modules/webpack/lib/util/binarySearchBounds.js
parentb1a6ea021f29f182b62f9f81024a3d8ac8621b7f (diff)
added make browserlist(autoprefixer) work fixed
Diffstat (limited to 'node_modules/webpack/lib/util/binarySearchBounds.js')
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1 files changed, 135 insertions, 0 deletions
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.indexOf("c") < 0) {
+ 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 =
+ "(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("");
+ 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)
+};