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Add support for V3.10

This commit is contained in:
~lucidiot 2022-07-19 04:55:15 +02:00
parent 11aeb8fcdd
commit 9a42fb4512
1 changed files with 24 additions and 5 deletions
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29
Lucidiot.Raima/DatabaseSchema.cs
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@ -9,16 +9,30 @@ namespace Lucidiot.Raima {
/// <summary>
/// Version 3.00, with a <c>V3.00 + 0x1A</c> file magic.
/// </summary>
V300
V300,
/// <summary>
/// Version 3.10, with a <c>V3.10 + 0x1A</c> file magic.
/// </summary>
V310
}
public class DatabaseSchema {
private short _pageSize = 512;
public short PageSize { get { return _pageSize; } }
public const DatabaseVersion Version = DatabaseVersion.V300;
public DatabaseVersion Version = DatabaseVersion.V300;
public const string Magic = "V3.00\x1a";
public const int MagicNumberLength = 6;
public Dictionary<string, DatabaseVersion> MagicNumbers {
get {
Dictionary<string, DatabaseVersion> numbers = new Dictionary<string,DatabaseVersion>();
numbers["V3.00\x1a"] = DatabaseVersion.V300;
numbers["V3.10\x1a"] = DatabaseVersion.V310;
return numbers;
}
}
public string DatabaseFileName;
@ -71,6 +85,10 @@ namespace Lucidiot.Raima {
this.StorageMethod = storage;
}
public DatabaseSchema(string fileName, IDatabaseStorage storage, DatabaseVersion version) : this(fileName, storage) {
this.Version = version;
}
public static DatabaseSchema Load(string fileName, IDatabaseStorage storage) {
if (!storage.CanRead)
throw new NotSupportedException("A readable storage method is required to load an existing database.");
@ -82,9 +100,10 @@ namespace Lucidiot.Raima {
}
private void Parse(BinaryReader br) {
string foundMagic = new String(Encoding.ASCII.GetChars(br.ReadBytes(Magic.Length)));
if (foundMagic != Magic)
string foundMagic = new String(Encoding.ASCII.GetChars(br.ReadBytes(MagicNumberLength)));
if (!MagicNumbers.ContainsKey(foundMagic))
throw new InvalidDataException("Unexpected file magic: " + foundMagic);
Version = MagicNumbers[foundMagic];
short pageSize = br.ReadInt16();
if (pageSize % 512 != 0)
throw new ArgumentOutOfRangeException("Page size must be a multiple of 512 bytes.");