public async Task <bool> EqualsAsync(Stream x, Stream y, CancellationToken cancellationToken)
{
var streamComparer = new OrdinalStreamEqualityComparer();
using (var zipX = new ZipArchive(x, ZipArchiveMode.Read, true))
using (var zipY = new ZipArchive(y, ZipArchiveMode.Read, true))
{
var entriesX = new HashSet <string>(zipX.Entries.Select(e => e.FullName));
var entriesY = new HashSet <string>(zipY.Entries.Select(e => e.FullName));
if (!entriesX.SetEquals(entriesY))
{
return(false);
}
foreach (var entry in entriesX)
{
using (var entryX = zipX.GetEntry(entry).Open())
using (var entryY = zipY.GetEntry(entry).Open())
{
if (!await streamComparer.EqualsAsync(entryX, entryY, CancellationToken.None))
{
return(false);
}
}
}
}
return(true);
}
public OrdinalCollapserComparer()
{
_nameComparer = StringComparer.Ordinal;
_streamComparer = new OrdinalStreamEqualityComparer();
}