/// <summary>
/// Quickly replace a certain file in rom
/// Does some hacks, leaves old file contents, so it should not be used repeatedly
/// </summary>
public static void ReplaceFile(string inromPath, Stream outrom, Stream injfile, string targetName)
{
using var inrom = File.OpenRead(inromPath);
using var readableRom = new FileReadableGameArchive(inromPath);
var header = new RomHeader();
inrom.Read(SpanUtil.AsBytes(ref header));
outrom.Seek(0, SeekOrigin.Begin);
inrom.Seek(0, SeekOrigin.Begin);
inrom.CopyTo(outrom);
var fileEntry = readableRom.FindFile(targetName);
var rawEntry = new RomEntry();
var rawEntryOffset = Marshal.SizeOf <RomHeader>() + fileEntry.SourceOffset;
var rawEntryBytesSpan = SpanUtil.AsBytes(ref rawEntry);
outrom.Seek(rawEntryOffset, SeekOrigin.Begin);
outrom.Read(rawEntryBytesSpan);
outrom.Seek(rawEntryOffset, SeekOrigin.Begin);
var newDataOffset = outrom.Length;
while (newDataOffset % header.offsetMultiplier != 0)
{
newDataOffset++;
}
rawEntry.RawDataOffset = newDataOffset / header.offsetMultiplier;
rawEntry.DataSize = (int)injfile.Length;
outrom.Write(rawEntryBytesSpan);
outrom.Seek(newDataOffset, SeekOrigin.Begin);
injfile.CopyTo(outrom);
}
