gulp-armapbo/dist/core/lzh/lzhCompressor.js

The plugin for Gulp which allows to pack ArmA pbo files from sources.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const stackBuffer_1 = require("./stackBuffer");
const lzhPacket_1 = require("./lzhPacket");
const lzhReporter_1 = require("./lzhReporter");
class LzhCompressor {
    constructor(options) {
        this._progress = new lzhReporter_1.LzhReporter(options);
    }
    writeCompressed(entry, target, offset) {
        let sourceOffset = 0;
        let targetOffset = offset;
        const dict = this._getCompressionDict();
        const source = entry.contents;
        this._progress.reportProgress(entry.name, source.length, 0);
        while (sourceOffset < source.length) {
            const packet = this._getPacket();
            sourceOffset += packet.compose(source, sourceOffset, dict);
            targetOffset += packet.flush(target, targetOffset);
            this._progress.reportProgress(entry.name, source.length, sourceOffset);
        }
        this._progress.reportProgress(entry.name, source.length, source.length);
        targetOffset = this._writeCrc(source, target, targetOffset);
        const written = targetOffset - offset;
        return written;
    }
    _writeCrc(source, target, offset) {
        const crc = this._getCrc(source);
        offset = target.writeUInt32LE(crc, offset);
        return offset;
    }
    _getCrc(source) {
        let crc = 0;
        for (const byte of source) {
            crc += byte;
        }
        return crc;
    }
    _getCompressionDict() {
        return new stackBuffer_1.StackBuffer();
    }
    _getPacket() {
        return new lzhPacket_1.LzhPacket();
    }
}
exports.LzhCompressor = LzhCompressor;

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