private void ProcessSubRecord(Subrecord sr, SubRecord[] srs)
{
long minSize = srs.Min(a => a.Size);
long maxSize = srs.Max(a => a.Size);
if (maxSize == 0)
{
// likely a group start
sr.size = -1;
return;
}
int szCount = 0;
foreach (var ss in srs)
{
if (ss.Size == 0)
{
continue;
}
var data = ss.GetReadonlyData();
if (IsLikelyString(new ArraySegment<byte>(data, 0, (int) ss.Size)))
{
if (++szCount > 10)
{
var elem = CreateType(null, "string");
sr.Items.Add(elem);
break;
}
}
else
{
break;
}
}
if (sr.Elements.Any())
{
return; // found string
}
if (minSize == maxSize && maxSize < 256)
{
sr.size = (int) maxSize;
int index = 0;
// Walk through each element guessing the data type
for (int offset = 0, elemSize = 4; offset < maxSize; offset += elemSize)
{
int numZero = 0;
int numFloat = 0;
int num2Short = 0;
int isFormID = 0;
int numTotal = 0;
int isLString = 0;
string reftype = null;
if (maxSize - offset < 4)
{
if (maxSize >= 2)
{
var elem = CreateType(index++, "short");
elem.size = 2;
sr.Items.Add(elem);
elemSize = 2;
continue;
}
else
{
var elem = CreateType(index++, "byte");
elem.size = 1;
sr.Items.Add(elem);
elemSize = 1;
continue;
}
}
foreach (var ss in srs)
{
// .Random(srs.Length < 10 ? 0 : srs.Length / 10)
++numTotal;
var data = ss.GetReadonlyData();
uint ui4 = TypeConverter.h2i(data[offset], data[offset + 1], data[offset + 2], data[offset + 3]);
if (ui4 == 0)
{
++numZero;
continue;
}
ushort lhs = TypeConverter.h2s(data[offset], data[offset + 1]);
ushort uhs = TypeConverter.h2s(data[offset + 2], data[offset + 3]);
float flt = TypeConverter.h2f(data[offset], data[offset + 1], data[offset + 2], data[offset + 3]);
if (IsLikelyFloat(flt))
{
++numFloat;
}
if (lhs > 0 && lhs < 255 && uhs > 0 && uhs < 255)
{
++num2Short;
}
if (ui4 > 100)
{
var r = FormLookup(ui4);
if (r != null)
{
if (string.IsNullOrEmpty(reftype))
{
reftype = r.Name;
isFormID++;
}
else if (reftype == r.Name)
{
isFormID++;
}
}
if (!string.IsNullOrEmpty(StringLookup(ui4)))
{
++isLString;
}
}
}
if (numTotal > 0)
{
float floatPct = (numFloat + numZero)/(float) numTotal;
float shortPct = (num2Short + numZero)/(float) numTotal;
float formPct = (isFormID + numZero)/(float) numTotal;
float lstrPct = (isLString + numZero)/(float) numTotal;
if (numFloat > 0 && floatPct > 0.5f)
{
var elem = CreateType(index++, "float");
elem.size = 4;
sr.Items.Add(elem);
}
else if (num2Short > 0 && shortPct > 0.5f)
{
var elem = CreateType(index++, "short");
elem.size = 2;
sr.Items.Add(elem);
sr.Items.Add(elem);
UpdateSize(sr);
}
else if (isFormID > 0 && formPct > 0.5f)
{
var elem = CreateType(index++, "formid");
elem.reftype = reftype;
elem.size = 4;
sr.Items.Add(elem);
}
else if (isLString > 0 && lstrPct > 0.5f)
{
var elem = CreateType(index++, "lstring");
elem.size = 4;
sr.Items.Add(elem);
}
else
{
var elem = CreateType(index++, "int");
elem.size = 4;
sr.Items.Add(elem);
}
}
}
}
else
{
// guess dynamically sized object... default to blob
if (!sr.Elements.Any())
{
long modSum = srs.Sum(a => a.Size%4); // useful if we suspect this is an array of integers
if (modSum == 0)
{
int count = 0;
string reftype = null;
foreach (var ss in srs)
{
var data = ss.GetReadonlyData();
int offset = 0;
uint ui4 = GetUInt32(data, offset);
if (ui4 < 100)
{
continue;
}
var r = FormLookup(ui4);
if (r != null)
{
if (string.IsNullOrEmpty(reftype))
{
reftype = r.Name;
}
else if (reftype == r.Name)
{
if (++count > 10)
{
break;
}
}
}
else
{
break;
}
}
if (count > 0)
{
var elem = CreateType("ID", "formid");
elem.reftype = reftype;
elem.size = 4;
elem.repeat = 1;
elem.optional = 1;
sr.Items.Add(elem);
}
}
}
// check if it is a string else make it a blob
sr.size = 0;
if (!sr.Elements.Any())
{
sr.Items.Add(CreateBlob());
}
}
}
