@khoohaoyit/image-size/dist/utils/streamParser.js

A stream based image size extractor in Node

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.StreamParser = void 0;
class StreamParser {
    constructor(stream) {
        this.stream = stream;
    }
    setEndianness(endianness) {
        this.endianness = endianness;
    }
    read(offset, size) {
        return __awaiter(this, void 0, void 0, function* () {
            return yield this.stream.readRange({ offset, size });
        });
    }
    readString(offset, size, encoding) {
        return __awaiter(this, void 0, void 0, function* () {
            const buf = yield this.read(offset, size);
            return buf.toString(encoding);
        });
    }
    readUInt8(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 1); return buf.readUInt8(); });
    }
    readUint8(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 1); return buf.readUint8(); });
    }
    readInt8(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 1); return buf.readInt8(); });
    }
    readUInt16LE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 2); return buf.readUInt16LE(); });
    }
    readUInt16BE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 2); return buf.readUInt16BE(); });
    }
    readUint16LE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 2); return buf.readUint16LE(); });
    }
    readUint16BE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 2); return buf.readUint16BE(); });
    }
    readInt16LE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 2); return buf.readInt16LE(); });
    }
    readInt16BE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 2); return buf.readInt16BE(); });
    }
    readUInt32LE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 4); return buf.readUInt32LE(); });
    }
    readUInt32BE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 4); return buf.readUInt32BE(); });
    }
    readUint32LE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 4); return buf.readUint32LE(); });
    }
    readUint32BE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 4); return buf.readUint32BE(); });
    }
    readInt32LE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 4); return buf.readInt32LE(); });
    }
    readInt32BE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 4); return buf.readInt32BE(); });
    }
    readBigUInt64BE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 8); return buf.readBigUInt64BE(); });
    }
    readBigUInt64LE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 8); return buf.readBigUInt64LE(); });
    }
    readBigUint64BE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 8); return buf.readBigUint64BE(); });
    }
    readBigUint64LE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 8); return buf.readBigUint64LE(); });
    }
    readBigInt64BE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 8); return buf.readBigInt64BE(); });
    }
    readBigInt64LE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 8); return buf.readBigInt64LE(); });
    }
    readFloatLE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 4); return buf.readFloatLE(); });
    }
    readFloatBE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 4); return buf.readFloatBE(); });
    }
    readDoubleLE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 8); return buf.readDoubleLE(); });
    }
    readDoubleBE(offset) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, 8); return buf.readDoubleBE(); });
    }
    readUInt16(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 2); return buf[`readUInt16${this.endianness}`](); });
    }
    readUint16(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 2); return buf[`readUint16${this.endianness}`](); });
    }
    readInt16(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 2); return buf[`readInt16${this.endianness}`](); });
    }
    readUInt32(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 4); return buf[`readUInt32${this.endianness}`](); });
    }
    readUint32(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 4); return buf[`readUint32${this.endianness}`](); });
    }
    readInt32(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 4); return buf[`readInt32${this.endianness}`](); });
    }
    readBigUInt64(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 8); return buf[`readBigUInt64${this.endianness}`](); });
    }
    readBigUint64(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 8); return buf[`readBigUint64${this.endianness}`](); });
    }
    readBigInt64(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 8); return buf[`readBigInt64${this.endianness}`](); });
    }
    readFloat(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 4); return buf[`readFloat${this.endianness}`](); });
    }
    readDouble(offset) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, 8); return buf[`readDouble${this.endianness}`](); });
    }
    readUIntLE(offset, byteLength) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, byteLength); return buf.readUIntLE(0, byteLength); });
    }
    readUIntBE(offset, byteLength) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, byteLength); return buf.readUIntBE(0, byteLength); });
    }
    readUintLE(offset, byteLength) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, byteLength); return buf.readUintLE(0, byteLength); });
    }
    readUintBE(offset, byteLength) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, byteLength); return buf.readUintBE(0, byteLength); });
    }
    readIntLE(offset, byteLength) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, byteLength); return buf.readIntLE(0, byteLength); });
    }
    readIntBE(offset, byteLength) {
        return __awaiter(this, void 0, void 0, function* () { const buf = yield this.read(offset, byteLength); return buf.readIntBE(0, byteLength); });
    }
    readUInt(offset, byteLength) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, byteLength); return buf[`readUInt${this.endianness}`](0, byteLength); });
    }
    readUint(offset, byteLength) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, byteLength); return buf[`readUint${this.endianness}`](0, byteLength); });
    }
    readInt(offset, byteLength) {
        return __awaiter(this, void 0, void 0, function* () { if (!this.endianness)
            throw new Error(`endianness not set`); const buf = yield this.read(offset, byteLength); return buf[`readInt${this.endianness}`](0, byteLength); });
    }
}
exports.StreamParser = StreamParser;