mdb-reader/lib/browser/JetFormat/Jet4Format.js

JavaScript library to read data from Access databases

import { GENERAL_LEGACY_SORT_ORDER } from "../SortOrder.js";
import { CodecType } from "./types.js";
export const jet4Format = {
    codecType: CodecType.JET,
    pageSize: 4096,
    textEncoding: "ucs-2",
    defaultSortOrder: GENERAL_LEGACY_SORT_ORDER,
    databaseDefinitionPage: {
        encryptedSize: 128,
        passwordSize: 40,
        creationDateOffset: 0x72, // 114
        defaultSortOrder: {
            offset: 0x6e, // 110
            size: 4,
        },
    },
    dataPage: {
        recordCountOffset: 12,
        record: {
            countOffset: 12,
            columnCountSize: 2,
            variableColumnCountSize: 2,
        },
    },
    tableDefinitionPage: {
        rowCountOffset: 16,
        variableColumnCountOffset: 43,
        columnCountOffset: 45,
        logicalIndexCountOffset: 47,
        realIndexCountOffset: 51,
        realIndexStartOffset: 63,
        realIndexEntrySize: 12,
        columnsDefinition: {
            typeOffset: 0,
            indexOffset: 5,
            variableIndexOffset: 7,
            flagsOffset: 15,
            fixedIndexOffset: 21,
            sizeOffset: 23,
            entrySize: 25,
        },
        columnNames: {
            nameLengthSize: 2,
        },
        usageMapOffset: 55,
    },
};