/// <summary>
/// Reads the tags.dat file.
/// </summary>
/// <param name="reader">The stream to read from.</param>
private void Load(BinaryReader reader)
{
// Read file header
reader.BaseStream.Position = 0x4;
var tagListOffset = reader.ReadInt32(); // 0x4 uint32 offset table offset
var tagCount = reader.ReadInt32(); // 0x8 uint32 number of tags
// Read tag offset list
reader.BaseStream.Position = tagListOffset;
for (var i = 0; i < tagCount; i++)
{
_headerOffsets.Add(reader.ReadUInt32());
}
// Read each tag
for (var i = 0; i < tagCount; i++)
{
if (_headerOffsets[i] == 0)
{
// Offset of 0 = null tag
_tags.Add(null);
continue;
}
// Read header
reader.BaseStream.Position = _headerOffsets[i];
var checksum = reader.ReadUInt32(); // 0x00 uint32 checksum?
var totalSize = reader.ReadUInt32(); // 0x04 uint32 total size
var numDependencies = reader.ReadInt16(); // 0x08 int16 dependencies count
var numDataFixups = reader.ReadInt16(); // 0x0A int16 data fixup count
var numResourceFixups = reader.ReadInt16(); // 0x0C int16 resource fixup count
reader.BaseStream.Position += 2; // 0x0E int16 (padding)
var mainStructOffset = reader.ReadUInt32(); // 0x10 uint32 main struct offset
var tagClass = new MagicNumber(reader.ReadInt32()); // 0x14 int32 class
var parentClass = new MagicNumber(reader.ReadInt32()); // 0x18 int32 parent class
var grandparentClass = new MagicNumber(reader.ReadInt32()); // 0x1C int32 grandparent class
var classId = reader.ReadUInt32(); // 0x20 uint32 class stringid
var totalHeaderSize = CalculateHeaderSize(numDependencies, numDataFixups, numResourceFixups);
// Construct the tag object
var tag = new HaloTag
{
Index = i,
Class = tagClass,
ParentClass = parentClass,
GrandparentClass = grandparentClass,
MainStructOffset = mainStructOffset - totalHeaderSize,
Offset = _headerOffsets[i] + totalHeaderSize,
Size = totalSize - totalHeaderSize,
Checksum = checksum,
ClassId = classId
};
_tags.Add(tag);
// Read dependencies
for (var j = 0; j < numDependencies; j++)
{
tag.Dependencies.Add(reader.ReadInt32());
}
// Read fixup pointers
var dataFixupPointers = new uint[numDataFixups];
for (var j = 0; j < numDataFixups; j++)
{
dataFixupPointers[j] = reader.ReadUInt32();
}
var resourceFixupPointers = new uint[numResourceFixups];
for (var j = 0; j < numResourceFixups; j++)
{
resourceFixupPointers[j] = reader.ReadUInt32();
}
// Process fixups
foreach (var fixup in dataFixupPointers)
{
tag.DataFixups.Add(ReadFixup(reader, fixup, _headerOffsets[i], totalHeaderSize));
}
foreach (var fixup in resourceFixupPointers)
{
tag.ResourceFixups.Add(ReadFixup(reader, fixup, _headerOffsets[i], totalHeaderSize));
}
}
}