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author | Minteck <contact@minteck.org> | 2023-02-23 19:34:56 +0100 |
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committer | Minteck <contact@minteck.org> | 2023-02-23 19:34:56 +0100 |
commit | 3d1cd02f27518f1a04374c7c8320cd5d82ede6e9 (patch) | |
tree | 75be5fba4368472fb11c8015aee026b2b9a71888 /school/node_modules/source-map/lib/binary-search.js | |
parent | 8cc1f13c17fa2fb5a4410542d39e650e02945634 (diff) | |
download | pluralconnect-3d1cd02f27518f1a04374c7c8320cd5d82ede6e9.tar.gz pluralconnect-3d1cd02f27518f1a04374c7c8320cd5d82ede6e9.tar.bz2 pluralconnect-3d1cd02f27518f1a04374c7c8320cd5d82ede6e9.zip |
Updated 40 files, added 37 files, deleted 1103 files and renamed 3905 files (automated)
Diffstat (limited to 'school/node_modules/source-map/lib/binary-search.js')
-rw-r--r-- | school/node_modules/source-map/lib/binary-search.js | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/school/node_modules/source-map/lib/binary-search.js b/school/node_modules/source-map/lib/binary-search.js deleted file mode 100644 index 010ac94..0000000 --- a/school/node_modules/source-map/lib/binary-search.js +++ /dev/null @@ -1,111 +0,0 @@ -/* -*- Mode: js; js-indent-level: 2; -*- */ -/* - * Copyright 2011 Mozilla Foundation and contributors - * Licensed under the New BSD license. See LICENSE or: - * http://opensource.org/licenses/BSD-3-Clause - */ - -exports.GREATEST_LOWER_BOUND = 1; -exports.LEAST_UPPER_BOUND = 2; - -/** - * Recursive implementation of binary search. - * - * @param aLow Indices here and lower do not contain the needle. - * @param aHigh Indices here and higher do not contain the needle. - * @param aNeedle The element being searched for. - * @param aHaystack The non-empty array being searched. - * @param aCompare Function which takes two elements and returns -1, 0, or 1. - * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or - * 'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the - * closest element that is smaller than or greater than the one we are - * searching for, respectively, if the exact element cannot be found. - */ -function recursiveSearch(aLow, aHigh, aNeedle, aHaystack, aCompare, aBias) { - // This function terminates when one of the following is true: - // - // 1. We find the exact element we are looking for. - // - // 2. We did not find the exact element, but we can return the index of - // the next-closest element. - // - // 3. We did not find the exact element, and there is no next-closest - // element than the one we are searching for, so we return -1. - var mid = Math.floor((aHigh - aLow) / 2) + aLow; - var cmp = aCompare(aNeedle, aHaystack[mid], true); - if (cmp === 0) { - // Found the element we are looking for. - return mid; - } - else if (cmp > 0) { - // Our needle is greater than aHaystack[mid]. - if (aHigh - mid > 1) { - // The element is in the upper half. - return recursiveSearch(mid, aHigh, aNeedle, aHaystack, aCompare, aBias); - } - - // The exact needle element was not found in this haystack. Determine if - // we are in termination case (3) or (2) and return the appropriate thing. - if (aBias == exports.LEAST_UPPER_BOUND) { - return aHigh < aHaystack.length ? aHigh : -1; - } else { - return mid; - } - } - else { - // Our needle is less than aHaystack[mid]. - if (mid - aLow > 1) { - // The element is in the lower half. - return recursiveSearch(aLow, mid, aNeedle, aHaystack, aCompare, aBias); - } - - // we are in termination case (3) or (2) and return the appropriate thing. - if (aBias == exports.LEAST_UPPER_BOUND) { - return mid; - } else { - return aLow < 0 ? -1 : aLow; - } - } -} - -/** - * This is an implementation of binary search which will always try and return - * the index of the closest element if there is no exact hit. This is because - * mappings between original and generated line/col pairs are single points, - * and there is an implicit region between each of them, so a miss just means - * that you aren't on the very start of a region. - * - * @param aNeedle The element you are looking for. - * @param aHaystack The array that is being searched. - * @param aCompare A function which takes the needle and an element in the - * array and returns -1, 0, or 1 depending on whether the needle is less - * than, equal to, or greater than the element, respectively. - * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or - * 'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the - * closest element that is smaller than or greater than the one we are - * searching for, respectively, if the exact element cannot be found. - * Defaults to 'binarySearch.GREATEST_LOWER_BOUND'. - */ -exports.search = function search(aNeedle, aHaystack, aCompare, aBias) { - if (aHaystack.length === 0) { - return -1; - } - - var index = recursiveSearch(-1, aHaystack.length, aNeedle, aHaystack, - aCompare, aBias || exports.GREATEST_LOWER_BOUND); - if (index < 0) { - return -1; - } - - // We have found either the exact element, or the next-closest element than - // the one we are searching for. However, there may be more than one such - // element. Make sure we always return the smallest of these. - while (index - 1 >= 0) { - if (aCompare(aHaystack[index], aHaystack[index - 1], true) !== 0) { - break; - } - --index; - } - - return index; -}; |