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ahmed
2025-10-15 17:34:18 +03:00
parent 9386cc7a84
commit a63a9b5511
11 changed files with 477 additions and 172 deletions
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48
Esiur/Data/ParsedTDU.cs
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@@ -16,7 +16,7 @@ namespace Esiur.Data
public ulong TotalLength;
public byte[] Metadata;
public static (ulong, ParsedTDU?) Parse(byte[] data, uint offset, uint ends)
public static ParsedTDU Parse(byte[] data, uint offset, uint ends)
{
var h = data[offset++];
@@ -27,7 +27,7 @@ namespace Esiur.Data
var exp = (h & 0x38) >> 3;
if (exp == 0)
return (1, new ParsedTDU()
return new ParsedTDU()
{
Identifier = (TDUIdentifier)h,
Data = data,
@@ -37,16 +37,20 @@ namespace Esiur.Data
Index = (byte)h & 0x7,
ContentLength = 0,
TotalLength = 1,
});
};
ulong cl = (ulong)(1 << (exp - 1));
if (ends - offset < cl)
return (cl - (ends - offset), null);
return new ParsedTDU()
{
Class = TDUClass.Invalid,
TotalLength = (cl - (ends - offset))
};
//offset += (uint)cl;
return (1 + cl, new ParsedTDU()
return new ParsedTDU()
{
Identifier = (TDUIdentifier)h,
Data = data,
@@ -56,14 +60,18 @@ namespace Esiur.Data
TotalLength = 1 + cl,
Exponent = (byte)exp,
Index = (byte)h & 0x7,
});
};
}
else if (cls == TDUClass.Typed)
{
ulong cll = (ulong)(h >> 3) & 0x7;
if (ends - offset < cll)
return (cll - (ends - offset), null);
return new ParsedTDU()
{
Class = TDUClass.Invalid,
TotalLength = (cll - (ends - offset))
};
ulong cl = 0;
@@ -71,13 +79,17 @@ namespace Esiur.Data
cl = cl << 8 | data[offset++];
if (ends - offset < cl)
return (cl - (ends - offset), null);
return new ParsedTDU()
{
TotalLength = (cl - (ends - offset)),
Class = TDUClass.Invalid,
};
var metaData = DC.Clip(data, offset + 1, data[offset]);
offset += data[offset] + (uint)1;
return (1 + cl + cll, new ParsedTDU()
return new ParsedTDU()
{
Identifier = (TDUIdentifier)(h & 0xC7),
Data = data,
@@ -87,14 +99,18 @@ namespace Esiur.Data
TotalLength = 1 + cl + cll,
Index = (byte)h & 0x7,
Metadata = metaData,
});
};
}
else
{
ulong cll = (ulong)(h >> 3) & 0x7;
if (ends - offset < cll)
return (cll - (ends - offset), null);
return new ParsedTDU()
{
Class = TDUClass.Invalid,
TotalLength = (cll - (ends - offset))
};
ulong cl = 0;
@@ -102,10 +118,14 @@ namespace Esiur.Data
cl = cl << 8 | data[offset++];
if (ends - offset < cl)
return (cl - (ends - offset), null);
return new ParsedTDU()
{
Class = TDUClass.Invalid,
TotalLength = (cl - (ends - offset))
};
return (1 + cl + cll,
return
new ParsedTDU()
{
Identifier = (TDUIdentifier)(h & 0xC7),
@@ -115,7 +135,7 @@ namespace Esiur.Data
ContentLength = cl,
TotalLength = 1 + cl + cll,
Index = (byte)h & 0x7
});
};
}
}