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Code Issues Releases Wiki Activity

Only load tracks if cache is invalid

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This commit is contained in:
Ted John
2016-10-23 01:12:17 +01:00
parent 9eaf887546
commit 712e062bcc
4 changed files with 132 additions and 47 deletions
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79
src/ride/TrackDesignRepository.cpp
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@@ -35,6 +35,10 @@ struct TrackRepositoryHeader
{
uint32 MagicNumber;
uint16 Version;
uint32 TotalFiles;
uint64 TotalFileSize;
uint32 FileDateModifiedChecksum;
uint32 PathChecksum;
uint32 NumItems;
};
#pragma pack(pop)
@@ -60,6 +64,7 @@ class TrackDesignRepository : public ITrackDesignRepository
{
private:
std::vector<TrackRepositoryItem> _items;
QueryDirectoryResult _directoryQueryResult;
public:
virtual ~TrackDesignRepository()
@@ -111,16 +116,24 @@ public:
void Scan() override
{
utf8 directory[MAX_PATH];
utf8 rct2Directory[MAX_PATH];
utf8 userDirectory[MAX_PATH];
GetRCT2Directory(directory, sizeof(directory));
Scan(directory, TRIF_READ_ONLY);
GetRCT2Directory(rct2Directory, sizeof(rct2Directory));
GetUserDirectory(userDirectory, sizeof(userDirectory));
GetUserDirectory(directory, sizeof(directory));
Scan(directory);
_items.clear();
_directoryQueryResult = { 0 };
Query(rct2Directory);
Query(userDirectory);
SortItems();
Save();
if (!Load())
{
Scan(rct2Directory, TRIF_READ_ONLY);
Scan(userDirectory);
SortItems();
Save();
}
}
bool Delete(const utf8 * path) override
@@ -193,6 +206,14 @@ public:
}
private:
void Query(const utf8 * directory)
{
utf8 pattern[MAX_PATH];
String::Set(pattern, sizeof(pattern), directory);
Path::Append(pattern, sizeof(pattern), "*.td4;*.td6");
Path::QueryDirectory(&_directoryQueryResult, pattern);
}
void Scan(const utf8 * directory, uint32 flags = 0)
{
utf8 pattern[MAX_PATH];
@@ -240,6 +261,46 @@ private:
});
}
bool Load()
{
utf8 path[MAX_PATH];
GetRepositoryPath(path, sizeof(path));
bool result = false;
try
{
auto fs = FileStream(path, FILE_MODE_OPEN);
// Read header, check if we need to re-scan
auto header = fs.ReadValue<TrackRepositoryHeader>();
if (header.MagicNumber == TRACK_REPOSITORY_MAGIC_NUMBER &&
header.Version == TRACK_REPOSITORY_VERSION &&
header.TotalFiles == _directoryQueryResult.TotalFiles &&
header.TotalFileSize == _directoryQueryResult.TotalFileSize &&
header.FileDateModifiedChecksum == _directoryQueryResult.FileDateModifiedChecksum &&
header.PathChecksum == _directoryQueryResult.PathChecksum)
{
// Directory is the same, just read the saved items
for (uint32 i = 0; i < header.NumItems; i++)
{
TrackRepositoryItem item;
item.Name = fs.ReadString();
item.Path = fs.ReadString();
item.RideType = fs.ReadValue<uint8>();
item.ObjectEntry = fs.ReadString();
item.Flags = fs.ReadValue<uint32>();
_items.push_back(item);
}
result = true;
}
}
catch (Exception ex)
{
Console::Error::WriteLine("Unable to write object repository index.");
}
return result;
}
void Save() const
{
utf8 path[MAX_PATH];
@@ -253,6 +314,10 @@ private:
TrackRepositoryHeader header = { 0 };
header.MagicNumber = TRACK_REPOSITORY_MAGIC_NUMBER;
header.Version = TRACK_REPOSITORY_VERSION;
header.TotalFiles = _directoryQueryResult.TotalFiles;
header.TotalFileSize = _directoryQueryResult.TotalFileSize;
header.FileDateModifiedChecksum = _directoryQueryResult.FileDateModifiedChecksum;
header.PathChecksum = _directoryQueryResult.PathChecksum;
header.NumItems = (uint32)_items.size();
fs.WriteValue(header);