mirror of
https://github.com/OpenDiablo2/OpenDiablo2
synced 2024-09-05 19:14:14 -04:00
106 lines
2.2 KiB
Go
106 lines
2.2 KiB
Go
package d2asset
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import (
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"errors"
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"path"
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"sync"
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"github.com/OpenDiablo2/OpenDiablo2/d2common"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2fileformats/d2mpq"
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"github.com/OpenDiablo2/OpenDiablo2/d2core/d2config"
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)
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type archiveEntry struct {
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archivePath string
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hashEntryMap d2mpq.HashEntryMap
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}
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type archiveManager struct {
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cache *d2common.Cache
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config d2config.Configuration
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entries []archiveEntry
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mutex sync.Mutex
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}
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const (
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archiveBudget = 1024 * 1024 * 512
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)
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func createArchiveManager(config d2config.Configuration) *archiveManager {
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return &archiveManager{cache: d2common.CreateCache(archiveBudget), config: config}
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}
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func (am *archiveManager) loadArchiveForFile(filePath string) (*d2mpq.MPQ, error) {
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am.mutex.Lock()
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defer am.mutex.Unlock()
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if err := am.cacheArchiveEntries(); err != nil {
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return nil, err
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}
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for _, archiveEntry := range am.entries {
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if archiveEntry.hashEntryMap.Contains(filePath) {
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return am.loadArchive(archiveEntry.archivePath)
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}
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}
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return nil, errors.New("file not found")
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}
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func (am *archiveManager) fileExistsInArchive(filePath string) (bool, error) {
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am.mutex.Lock()
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defer am.mutex.Unlock()
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if err := am.cacheArchiveEntries(); err != nil {
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return false, err
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}
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for _, archiveEntry := range am.entries {
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if archiveEntry.hashEntryMap.Contains(filePath) {
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return true, nil
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}
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}
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return false, nil
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}
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func (am *archiveManager) loadArchive(archivePath string) (*d2mpq.MPQ, error) {
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if archive, found := am.cache.Retrieve(archivePath); found {
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return archive.(*d2mpq.MPQ), nil
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}
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archive, err := d2mpq.Load(archivePath)
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if err != nil {
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return nil, err
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}
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if err := am.cache.Insert(archivePath, archive, int(archive.Data.ArchiveSize)); err != nil {
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return nil, err
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}
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return archive, nil
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}
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func (am *archiveManager) cacheArchiveEntries() error {
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if len(am.entries) == len(am.config.MpqLoadOrder) {
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return nil
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}
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am.entries = nil
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for _, archiveName := range am.config.MpqLoadOrder {
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archivePath := path.Join(am.config.MpqPath, archiveName)
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archive, err := am.loadArchive(archivePath)
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if err != nil {
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return err
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}
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am.entries = append(
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am.entries,
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archiveEntry{archivePath, archive.HashEntryMap},
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)
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}
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return nil
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}
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