145 lines
9.8 KiB
JavaScript
145 lines
9.8 KiB
JavaScript
// exFAT filesystem implementation
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import { BaseFilesystem } from './base.js';
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import { checkDependencies, updateResultItem } from '../utils.js';
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export class ExFATFilesystem extends BaseFilesystem {
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constructor() {
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super('exFAT', [
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{
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id: 'exfat',
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name: 'exFAT',
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constants: [
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{ id: 'partitionStartExfat', label: 'Partitions-Start (GPT-Offset)', unit: 'Bytes', default: '0x100000' },
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{ id: 'sectorSizeExfat', label: 'Sektor-Größe 2^n (Offset 0x6C)', unit: 'Bytes (2^n)', default: '0x09' },
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{ id: 'clusterSizeSectorsExfat', label: 'Cluster-Größe 2^n (Offset 0x6D)', unit: 'Sektoren (2^n)', default: '0x03' },
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{ id: 'numFATsExfat', label: 'Anzahl FATs (Offset 0x6E)', unit: 'Anzahl', default: '0x01' }
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],
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inputs: [
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{ id: 'fatPositionExfat', label: 'FAT-Position (Offset 0x50)', unit: 'Sektoren', placeholder: '0x80' },
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{ id: 'dataAreaPositionExfat', label: 'Daten-Bereich Position (Offset 0x58)', unit: 'Sektoren', placeholder: '0x90' },
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{ id: 'rootDirClusterExfat', label: 'Wurzelverzeichnis Cluster (Offset 0x60)', unit: 'Cluster', placeholder: '0x05' },
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{ id: 'clusterNumberExfat', label: 'Cluster-Nummer', unit: 'Nummer', placeholder: '0x05' }
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],
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resultGroups: [
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{
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name: 'Boot-Struktur',
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results: [
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{ id: 'backupBootExfat', label: 'Backup Boot-Sektor', dependencies: ['partitionStartExfat'], formula: 'Partitions-Start + (12 Sektoren × Sektorgröße)' }
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]
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},
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{
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name: 'FAT-Bereich',
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results: [
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{ id: 'fatStartExfat', label: 'FAT-Bereich Anfang', dependencies: ['partitionStartExfat', 'fatPositionExfat', 'sectorSizeExfat'], formula: 'Partitions-Start + (FAT-Position × Sektorgröße)' },
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{ id: 'dataAreaStartExfat', label: 'Daten-Bereich Anfang', dependencies: ['partitionStartExfat', 'dataAreaPositionExfat', 'sectorSizeExfat'], formula: 'Partitions-Start + (Daten-Position × Sektorgröße)' }
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]
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},
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{
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name: 'Cluster-Berechnungen',
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results: [
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{ id: 'clusterSizeBytesExfat', label: 'Cluster-Größe (Bytes)', dependencies: ['sectorSizeExfat', 'clusterSizeSectorsExfat'], formula: '2^Sektor-Größe × 2^Cluster-Größe' },
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{ id: 'rootDirOffsetExfat', label: 'Wurzelverzeichnis Offset', dependencies: ['partitionStartExfat', 'dataAreaPositionExfat', 'sectorSizeExfat', 'clusterSizeSectorsExfat', 'rootDirClusterExfat'], formula: 'Daten-Bereich + (Cluster - 2) × Cluster-Größe' },
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{ id: 'clusterOffsetExfat', label: 'Spezifischer Cluster Offset', dependencies: ['partitionStartExfat', 'dataAreaPositionExfat', 'sectorSizeExfat', 'clusterSizeSectorsExfat', 'clusterNumberExfat'], formula: 'Daten-Bereich + (Cluster - 2) × Cluster-Größe' },
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{ id: 'fatEntryOffsetExfat', label: 'FAT-Eintrag Offset', dependencies: ['partitionStartExfat', 'fatPositionExfat', 'sectorSizeExfat', 'clusterNumberExfat'], formula: 'FAT-Start + (Cluster × 4)' }
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]
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}
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],
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formulas: [
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{ name: 'Backup Boot-Sektor', expression: 'Partitions-Start + (12 × Sektorgröße)' },
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{ name: 'Sektorgröße (Bytes)', expression: '2^n (aus Offset 0x6C)' },
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{ name: 'Cluster-Größe (Sektoren)', expression: '2^n (aus Offset 0x6D)' },
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{ name: 'Cluster-Größe (Bytes)', expression: 'Sektorgröße × Cluster-Größe (Sektoren)' },
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{ name: 'FAT-Bereich Anfang', expression: 'Partitions-Start + (FAT-Position × Sektorgröße)' },
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{ name: 'Daten-Bereich Anfang', expression: 'Partitions-Start + (Daten-Position × Sektorgröße)' },
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{ name: 'Wurzelverzeichnis Offset', expression: 'Daten-Bereich + ((Cluster - 2) × Cluster-Größe)' },
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{ name: 'Cluster Offset', expression: 'Daten-Bereich + ((Cluster-Nummer - 2) × Cluster-Größe)' },
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{ name: 'FAT-Eintrag Offset', expression: 'FAT-Start + (Cluster-Nummer × 4)' }
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]
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}
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]);
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}
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calculate(variantId) {
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if (variantId !== 'exfat') return;
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const values = this.getInputValues(variantId);
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const results = {};
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this.calculateExFAT(values, results);
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}
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calculateExFAT(values, results) {
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// Calculate actual sector size from 2^n
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const sectorSize = Math.pow(2, values.sectorSizeExfat);
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// Calculate actual cluster size in sectors from 2^n
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const clusterSizeSectors = Math.pow(2, values.clusterSizeSectorsExfat);
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// Backup Boot-Sektor (12 sectors after partition start)
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if (checkDependencies(['partitionStartExfat'])) {
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results.backupBoot = values.partitionStartExfat + (12 * sectorSize);
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updateResultItem('backupBootExfat', results.backupBoot, true,
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`0x${values.partitionStartExfat.toString(16)} + (12 × 0x${sectorSize.toString(16)}) = 0x${results.backupBoot.toString(16)}`);
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} else {
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updateResultItem('backupBootExfat', 0, false);
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}
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// FAT-Bereich Anfang
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if (checkDependencies(['partitionStartExfat', 'fatPositionExfat', 'sectorSizeExfat'])) {
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results.fatStart = values.partitionStartExfat + (values.fatPositionExfat * sectorSize);
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results.fatStartSector = values.fatPositionExfat;
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updateResultItem('fatStartExfat', { bytes: results.fatStart, sectors: results.fatStartSector }, true,
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`0x${values.partitionStartExfat.toString(16)} + (0x${values.fatPositionExfat.toString(16)} × 0x${sectorSize.toString(16)}) = 0x${results.fatStart.toString(16)}`);
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} else {
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updateResultItem('fatStartExfat', 0, false);
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}
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// Daten-Bereich Anfang
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if (checkDependencies(['partitionStartExfat', 'dataAreaPositionExfat', 'sectorSizeExfat'])) {
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results.dataAreaStart = values.partitionStartExfat + (values.dataAreaPositionExfat * sectorSize);
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results.dataAreaStartSector = values.dataAreaPositionExfat;
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updateResultItem('dataAreaStartExfat', { bytes: results.dataAreaStart, sectors: results.dataAreaStartSector }, true,
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`0x${values.partitionStartExfat.toString(16)} + (0x${values.dataAreaPositionExfat.toString(16)} × 0x${sectorSize.toString(16)}) = 0x${results.dataAreaStart.toString(16)}`);
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} else {
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updateResultItem('dataAreaStartExfat', 0, false);
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}
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// Cluster-Größe in Bytes
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if (checkDependencies(['sectorSizeExfat', 'clusterSizeSectorsExfat'])) {
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results.clusterSizeBytes = sectorSize * clusterSizeSectors;
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updateResultItem('clusterSizeBytesExfat', results.clusterSizeBytes, true,
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`2^${values.sectorSizeExfat} × 2^${values.clusterSizeSectorsExfat} = 0x${sectorSize.toString(16)} × 0x${clusterSizeSectors.toString(16)} = 0x${results.clusterSizeBytes.toString(16)}`);
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} else {
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updateResultItem('clusterSizeBytesExfat', 0, false);
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}
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// Wurzelverzeichnis Offset (beachtet Index-Verschiebung von -2)
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if (checkDependencies(['partitionStartExfat', 'dataAreaPositionExfat', 'sectorSizeExfat', 'clusterSizeSectorsExfat', 'rootDirClusterExfat']) && results.dataAreaStart !== undefined && results.clusterSizeBytes !== undefined) {
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results.rootDirOffset = results.dataAreaStart + ((values.rootDirClusterExfat - 2) * results.clusterSizeBytes);
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updateResultItem('rootDirOffsetExfat', results.rootDirOffset, true,
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`0x${results.dataAreaStart.toString(16)} + ((0x${values.rootDirClusterExfat.toString(16)} - 0x2) × 0x${results.clusterSizeBytes.toString(16)}) = 0x${results.rootDirOffset.toString(16)}`);
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} else {
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updateResultItem('rootDirOffsetExfat', 0, false);
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}
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// Spezifischer Cluster Offset (beachtet Index-Verschiebung von -2)
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if (checkDependencies(['partitionStartExfat', 'dataAreaPositionExfat', 'sectorSizeExfat', 'clusterSizeSectorsExfat', 'clusterNumberExfat']) && results.dataAreaStart !== undefined && results.clusterSizeBytes !== undefined) {
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results.clusterOffset = results.dataAreaStart + ((values.clusterNumberExfat - 2) * results.clusterSizeBytes);
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updateResultItem('clusterOffsetExfat', results.clusterOffset, true,
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`0x${results.dataAreaStart.toString(16)} + ((0x${values.clusterNumberExfat.toString(16)} - 0x2) × 0x${results.clusterSizeBytes.toString(16)}) = 0x${results.clusterOffset.toString(16)}`);
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} else {
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updateResultItem('clusterOffsetExfat', 0, false);
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}
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// FAT-Eintrag Offset (32-Bit = 4 Bytes pro Eintrag)
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if (checkDependencies(['partitionStartExfat', 'fatPositionExfat', 'sectorSizeExfat', 'clusterNumberExfat']) && results.fatStart !== undefined) {
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const entrySize = 4; // exFAT uses 4 bytes (32-bit) per FAT entry
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results.fatEntryOffset = results.fatStart + (values.clusterNumberExfat * entrySize);
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updateResultItem('fatEntryOffsetExfat', results.fatEntryOffset, true,
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`0x${results.fatStart.toString(16)} + (0x${values.clusterNumberExfat.toString(16)} × ${entrySize}) = 0x${results.fatEntryOffset.toString(16)}`);
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} else {
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updateResultItem('fatEntryOffsetExfat', 0, false);
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}
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}
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}
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