TransFlow/node_modules/js-sdsl/dist/esm/HashMap/HashMap.js

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import LinkList from "../LinkList/LinkList";
import Map from "../Map/Map";
HashMap.initSize = (1 << 4);
HashMap.maxSize = (1 << 30);
HashMap.sigma = 0.75; // default load factor
HashMap.treeifyThreshold = 8;
HashMap.untreeifyThreshold = 6;
HashMap.minTreeifySize = 64;
/**
 * Note that resize is a time-consuming operation, please try to determine the number of buckets before use.
 * @param container Initialize the container
 * @param initBucketNum Initialize the bucket num, must be 2 to the power of n
 * @param hashFunc Function to map elements to numbers
 * @constructor
 */
function HashMap(container, initBucketNum, hashFunc) {
    var _this = this;
    if (container === void 0) { container = []; }
    if (initBucketNum === void 0) { initBucketNum = HashMap.initSize; }
    hashFunc = hashFunc || (function (x) {
        var e_1, _a;
        var hashCode = 0;
        var str = '';
        if (typeof x === "number") {
            hashCode = Math.floor(x);
            hashCode = ((hashCode << 5) - hashCode);
            hashCode = hashCode & hashCode;
        }
        else {
            if (typeof x !== "string") {
                str = JSON.stringify(x);
            }
            else
                str = x;
            try {
                for (var str_1 = __values(str), str_1_1 = str_1.next(); !str_1_1.done; str_1_1 = str_1.next()) {
                    var ch = str_1_1.value;
                    var character = ch.charCodeAt(0);
                    hashCode = ((hashCode << 5) - hashCode) + character;
                    hashCode = hashCode & hashCode;
                }
            }
            catch (e_1_1) { e_1 = { error: e_1_1 }; }
            finally {
                try {
                    if (str_1_1 && !str_1_1.done && (_a = str_1.return)) _a.call(str_1);
                }
                finally { if (e_1) throw e_1.error; }
            }
        }
        hashCode ^= (hashCode >>> 16);
        return hashCode;
    });
    if ((initBucketNum & (initBucketNum - 1)) !== 0) {
        throw new Error("initBucketNum must be 2 to the power of n");
    }
    var len = 0;
    var hashTable = [];
    var bucketNum = Math.max(HashMap.initSize, Math.min(HashMap.maxSize, initBucketNum));
    this.size = function () {
        return len;
    };
    this.empty = function () {
        return len === 0;
    };
    this.clear = function () {
        len = 0;
        bucketNum = initBucketNum;
        hashTable = [];
    };
    this.forEach = function (callback) {
        var index = 0;
        hashTable.forEach(function (container) {
            container.forEach(function (element) {
                callback(element, index++);
            });
        });
    };
    var reAllocate = function (originalBucketNum) {
        if (originalBucketNum >= HashMap.maxSize)
            return;
        bucketNum = originalBucketNum * 2;
        var newHashTable = [];
        hashTable.forEach(function (container, index) {
            if (container.empty())
                return;
            if (container instanceof LinkList && container.size() === 1) {
                var _a = container.front(), key = _a.key, value = _a.value;
                newHashTable[hashFunc(key) & (bucketNum - 1)] = new LinkList([{
                        key: key,
                        value: value
                    }]);
            }
            else if (container instanceof Map) {
                var lowList_1 = new LinkList();
                var highList_1 = new LinkList();
                container.forEach(function (pair) {
                    var hashCode = hashFunc(pair.key);
                    if ((hashCode & originalBucketNum) === 0) {
                        lowList_1.pushBack(pair);
                    }
                    else
                        highList_1.pushBack(pair);
                });
                if (lowList_1.size() > HashMap.untreeifyThreshold)
                    newHashTable[index] = new Map(lowList_1);
                else if (lowList_1.size())
                    newHashTable[index] = lowList_1;
                if (highList_1.size() > HashMap.untreeifyThreshold)
                    newHashTable[index + originalBucketNum] = new Map(highList_1);
                else if (highList_1.size())
                    newHashTable[index + originalBucketNum] = highList_1;
            }
            else {
                var lowList_2 = new LinkList();
                var highList_2 = new LinkList();
                container.forEach(function (pair) {
                    var hashCode = hashFunc(pair.key);
                    if ((hashCode & originalBucketNum) === 0) {
                        lowList_2.pushBack(pair);
                    }
                    else
                        highList_2.pushBack(pair);
                });
                if (lowList_2.size())
                    newHashTable[index] = lowList_2;
                if (highList_2.size())
                    newHashTable[index + originalBucketNum] = highList_2;
            }
            hashTable[index].clear();
        });
        hashTable = newHashTable;
    };
    this.setElement = function (key, value) {
        var e_2, _a;
        if (key === null || key === undefined) {
            throw new Error("to avoid some unnecessary errors, we don't suggest you insert null or undefined here");
        }
        if (value === null || value === undefined) {
            this.eraseElementByKey(key);
            return;
        }
        var index = hashFunc(key) & (bucketNum - 1);
        if (!hashTable[index]) {
            ++len;
            hashTable[index] = new LinkList([{ key: key, value: value }]);
        }
        else {
            var preSize = hashTable[index].size();
            if (hashTable[index] instanceof LinkList) {
                try {
                    for (var _b = __values(hashTable[index]), _c = _b.next(); !_c.done; _c = _b.next()) {
                        var pair = _c.value;
                        if (pair.key === key) {
                            pair.value = value;
                            return;
                        }
                    }
                }
                catch (e_2_1) { e_2 = { error: e_2_1 }; }
                finally {
                    try {
                        if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
                    }
                    finally { if (e_2) throw e_2.error; }
                }
                hashTable[index].pushBack({
                    key: key,
                    value: value,
                });
                if (hashTable[index].size() >= HashMap.treeifyThreshold) {
                    hashTable[index] = new Map(hashTable[index]);
                }
            }
            else
                hashTable[index].setElement(key, value);
            var curSize = hashTable[index].size();
            len += curSize - preSize;
        }
        if (len > bucketNum * HashMap.sigma) {
            reAllocate.call(this, bucketNum);
        }
    };
    this.getElementByKey = function (key) {
        var e_3, _a;
        var index = hashFunc(key) & (bucketNum - 1);
        if (!hashTable[index])
            return undefined;
        if (hashTable[index] instanceof Map)
            return hashTable[index].getElementByKey(key);
        else {
            try {
                for (var _b = __values(hashTable[index]), _c = _b.next(); !_c.done; _c = _b.next()) {
                    var pair = _c.value;
                    if (pair.key === key)
                        return pair.value;
                }
            }
            catch (e_3_1) { e_3 = { error: e_3_1 }; }
            finally {
                try {
                    if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
                }
                finally { if (e_3) throw e_3.error; }
            }
            return undefined;
        }
    };
    this.eraseElementByKey = function (key) {
        var e_4, _a;
        var index = hashFunc(key) & (bucketNum - 1);
        if (!hashTable[index])
            return;
        var preSize = hashTable[index].size();
        if (hashTable[index] instanceof Map) {
            hashTable[index].eraseElementByKey(key);
            if (hashTable[index].size() <= HashMap.untreeifyThreshold) {
                hashTable[index] = new LinkList(hashTable[index]);
            }
        }
        else {
            var pos = -1;
            try {
                for (var _b = __values(hashTable[index]), _c = _b.next(); !_c.done; _c = _b.next()) {
                    var pair = _c.value;
                    ++pos;
                    if (pair.key === key) {
                        hashTable[index].eraseElementByPos(pos);
                        break;
                    }
                }
            }
            catch (e_4_1) { e_4 = { error: e_4_1 }; }
            finally {
                try {
                    if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
                }
                finally { if (e_4) throw e_4.error; }
            }
        }
        var curSize = hashTable[index].size();
        len += curSize - preSize;
    };
    this.find = function (key) {
        var e_5, _a;
        var index = hashFunc(key) & (bucketNum - 1);
        if (!hashTable[index])
            return false;
        if (hashTable[index] instanceof Map)
            return hashTable[index].find(key);
        try {
            for (var _b = __values(hashTable[index]), _c = _b.next(); !_c.done; _c = _b.next()) {
                var pair = _c.value;
                if (pair.key === key)
                    return true;
            }
        }
        catch (e_5_1) { e_5 = { error: e_5_1 }; }
        finally {
            try {
                if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
            }
            finally { if (e_5) throw e_5.error; }
        }
        return false;
    };
    this[Symbol.iterator] = function () {
        return (function () {
            var index, _a, _b, pair, e_6_1;
            var e_6, _c;
            return __generator(this, function (_d) {
                switch (_d.label) {
                    case 0:
                        index = 0;
                        _d.label = 1;
                    case 1:
                        if (!(index < bucketNum)) return [3 /*break*/, 10];
                        while (index < bucketNum && !hashTable[index])
                            ++index;
                        if (index >= bucketNum)
                            return [3 /*break*/, 10];
                        _d.label = 2;
                    case 2:
                        _d.trys.push([2, 7, 8, 9]);
                        _a = (e_6 = void 0, __values(hashTable[index])), _b = _a.next();
                        _d.label = 3;
                    case 3:
                        if (!!_b.done) return [3 /*break*/, 6];
                        pair = _b.value;
                        return [4 /*yield*/, pair];
                    case 4:
                        _d.sent();
                        _d.label = 5;
                    case 5:
                        _b = _a.next();
                        return [3 /*break*/, 3];
                    case 6: return [3 /*break*/, 9];
                    case 7:
                        e_6_1 = _d.sent();
                        e_6 = { error: e_6_1 };
                        return [3 /*break*/, 9];
                    case 8:
                        try {
                            if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
                        }
                        finally { if (e_6) throw e_6.error; }
                        return [7 /*endfinally*/];
                    case 9:
                        ++index;
                        return [3 /*break*/, 1];
                    case 10: return [2 /*return*/];
                }
            });
        })();
    };
    container.forEach(function (_a) {
        var key = _a.key, value = _a.value;
        return _this.setElement(key, value);
    });
    Object.freeze(this);
}
Object.freeze(HashMap);
export default HashMap;