basant307/AI_Governance_Project

1"use strict";2Object.defineProperty(exports, "__esModule", { value: true });3exports.BencodeDecoder = void 0;4const Reader_1 = require("@jsonjoy.com/buffers/lib/Reader");5class BencodeDecoder {6    constructor() {7        this.reader = new Reader_1.Reader();8    }9    read(uint8) {10        this.reader.reset(uint8);11        return this.readAny();12    }13    decode(uint8) {14        this.reader.reset(uint8);15        return this.readAny();16    }17    readAny() {18        const reader = this.reader;19        const x = reader.x;20        const uint8 = reader.uint8;21        const char = uint8[x];22        switch (char) {23            case 0x69:24                return this.readNum();25            case 0x64:26                return this.readObj();27            case 0x6c:28                return this.readArr();29            case 0x66:30                return this.readFalse();31            case 0x74:32                return this.readTrue();33            case 110:34                return this.readNull();35            case 117:36                return this.readUndef();37            default:38                if (char >= 48 && char <= 57)39                    return this.readBin();40        }41        throw new Error('INVALID_BENCODE');42    }43    readNull() {44        if (this.reader.u8() !== 0x6e)45            throw new Error('INVALID_BENCODE');46        return null;47    }48    readUndef() {49        if (this.reader.u8() !== 117)50            throw new Error('INVALID_BENCODE');51        return undefined;52    }53    readTrue() {54        if (this.reader.u8() !== 0x74)55            throw new Error('INVALID_BENCODE');56        return true;57    }58    readFalse() {59        if (this.reader.u8() !== 0x66)60            throw new Error('INVALID_BENCODE');61        return false;62    }63    readBool() {64        const reader = this.reader;65        switch (reader.uint8[reader.x]) {66            case 0x66:67                return this.readFalse();68            case 0x74:69                return this.readTrue();70            default:71                throw new Error('INVALID_BENCODE');72        }73    }74    readNum() {75        const reader = this.reader;76        const startChar = reader.u8();77        if (startChar !== 0x69)78            throw new Error('INVALID_BENCODE');79        const u8 = reader.uint8;80        let x = reader.x;81        let numStr = '';82        let c = u8[x++];83        let i = 0;84        while (c !== 0x65) {85            numStr += String.fromCharCode(c);86            c = u8[x++];87            if (i > 25)88                throw new Error('INVALID_BENCODE');89            i++;90        }91        if (!numStr)92            throw new Error('INVALID_BENCODE');93        reader.x = x;94        return +numStr;95    }96    readStr() {97        const bin = this.readBin();98        return new TextDecoder().decode(bin);99    }100    readBin() {101        const reader = this.reader;102        const u8 = reader.uint8;103        let lenStr = '';104        let x = reader.x;105        let c = u8[x++];106        let i = 0;107        while (c !== 0x3a) {108            if (c < 48 || c > 57)109                throw new Error('INVALID_BENCODE');110            lenStr += String.fromCharCode(c);111            c = u8[x++];112            if (i > 10)113                throw new Error('INVALID_BENCODE');114            i++;115        }116        reader.x = x;117        const len = +lenStr;118        const bin = reader.buf(len);119        return bin;120    }121    readArr() {122        const reader = this.reader;123        if (reader.u8() !== 0x6c)124            throw new Error('INVALID_BENCODE');125        const arr = [];126        const uint8 = reader.uint8;127        while (true) {128            const char = uint8[reader.x];129            if (char === 0x65) {130                reader.x++;131                return arr;132            }133            arr.push(this.readAny());134        }135    }136    readObj() {137        const reader = this.reader;138        if (reader.u8() !== 0x64)139            throw new Error('INVALID_BENCODE');140        const obj = {};141        const uint8 = reader.uint8;142        while (true) {143            const char = uint8[reader.x];144            if (char === 0x65) {145                reader.x++;146                return obj;147            }148            const key = this.readStr();149            if (key === '__proto__')150                throw new Error('INVALID_KEY');151            obj[key] = this.readAny();152        }153    }154}155exports.BencodeDecoder = BencodeDecoder;156//# sourceMappingURL=BencodeDecoder.js.map