/// <summary>
/// Reads Bioware Encapsulated Resource Files
/// </summary>
/// <param name="s">The Stream from which the File will be Read</param>
protected ERF(Stream s)
{
using (BinaryReader br = new BinaryReader(s))
{
//header
FileType = new string(br.ReadChars(4));
Version = new string(br.ReadChars(4));
LanguageCount = br.ReadInt32();
LocalizedStringSize = br.ReadInt32();
EntryCount = br.ReadInt32();
OffsetToLocalizedStrings = br.ReadInt32();
OffsetToKeyList = br.ReadInt32();
OffsetToResourceList = br.ReadInt32();
BuildYear = br.ReadInt32();
BuildDay = br.ReadInt32();
DescriptionStrRef = br.ReadInt32();
Reserved_block = br.ReadBytes(116);
br.BaseStream.Seek(OffsetToLocalizedStrings, SeekOrigin.Begin); //seek to local strings
for (int i = 0; i < LanguageCount; i++)
{
String_List_Element SLE = new String_List_Element();
SLE.LanguageID = br.ReadInt32();
SLE.Language = Reference_Tables.Language_IDs[SLE.LanguageID];
SLE.StringSize = br.ReadInt32();
SLE.String = new string(br.ReadChars(SLE.StringSize));
Localized_String_List.Add(SLE);
}
br.BaseStream.Seek(OffsetToKeyList, SeekOrigin.Begin); //seek to key entries
for (int i = 0; i < EntryCount; i++)
{
Key key = new Key();
key.ResRef = new string(br.ReadChars(16)).TrimEnd('\0');
key.ResID = br.ReadInt32();
key.ResType = br.ReadInt16();
key.Type_string = Reference_Tables.Res_Types[key.ResType];
key.Unused = br.ReadInt16();
Key_List.Add(key);
}
br.BaseStream.Seek(OffsetToResourceList, SeekOrigin.Begin); //seek to resource list
for (int i = 0; i < EntryCount; i++)
{
Resource Res = new Resource();
Res.OffsetToResource = br.ReadInt32();
Res.ResourceSize = br.ReadInt32();
Resource_List.Add(Res);
}
foreach (Resource r in Resource_List) //populate resource_data for each resource in the list
{
br.BaseStream.Seek(r.OffsetToResource, SeekOrigin.Begin); //seek to raw resource data
r.Resource_data = br.ReadBytes(r.ResourceSize);
}
}
}
/// <summary>
/// Adds another resource to the <see cref="ERF"/>.
/// </summary>
/// <param name="res_ref">The name of the resource/file. *Maximum of 16 Characters</param>
/// <param name="file_data">A byte array containing the data for the resource</param>
public void Append_File(string res_ref, byte[] file_data)
{
//header
EntryCount++;
OffsetToResourceList += 24;
//key
Key k = new Key();
k.ResRef = res_ref;
k.ResID = Key_List.Last().ResID + 1;
StringBuilder sb = new StringBuilder(4);
sb.Append(new char[4] {
(char)file_data[0], (char)file_data[1], (char)file_data[2], (char)file_data[3],
});
k.ResType = (short)Reference_Tables.TypeCodes[sb.ToString()];
k.Type_string = k.Type_string = Reference_Tables.Res_Types[k.ResType];
k.Unused = 0;
Key_List.Add(k);
//Offset Correction
int TotalOffset = OffsetToResourceList + EntryCount * 8;
foreach (Resource res in Resource_List)
{
res.OffsetToResource = TotalOffset;
TotalOffset += res.ResourceSize;
}
//resource
Resource r = new Resource();
r.Resource_data = file_data;
r.ResourceSize = file_data.Length;
r.OffsetToResource = Resource_List.Last().OffsetToResource + Resource_List.Last().ResourceSize;
Resource_List.Add(r);
}
