void ModifyEntry(ZipFile workFile, ZipUpdate update)
{
workFile.WriteLocalEntryHeader(update);
long dataStart = workFile.baseStream_.Position;
// TODO: This is slow if the changes don't effect the data!!
if ( update.Entry.IsFile && (update.Filename != null) ) {
using ( Stream output = workFile.GetOutputStream(update.OutEntry) ) {
using ( Stream source = this.GetInputStream(update.Entry) ) {
CopyBytes(update, output, source, source.Length, true);
}
}
}
long dataEnd = workFile.baseStream_.Position;
update.Entry.CompressedSize = dataEnd - dataStart;
}
void CopyEntry(ZipFile workFile, ZipUpdate update)
{
workFile.WriteLocalEntryHeader(update);
if ( update.Entry.CompressedSize > 0 ) {
const int NameLengthOffset = 26;
long entryDataOffset = update.Entry.Offset + NameLengthOffset;
// TODO: This wont work for SFX files!
baseStream_.Seek(entryDataOffset, SeekOrigin.Begin);
uint nameLength = ReadLEUshort();
uint extraLength = ReadLEUshort();
baseStream_.Seek(nameLength + extraLength, SeekOrigin.Current);
CopyBytes(update, workFile.baseStream_, baseStream_, update.Entry.CompressedSize, false);
}
CopyDescriptorBytes(update, workFile.baseStream_, baseStream_);
}
void CopyEntryDirect(ZipFile workFile, ZipUpdate update, ref long destinationPosition)
{
bool skipOver = false;
if ( update.Entry.Offset == destinationPosition ) {
skipOver = true;
}
if ( !skipOver ) {
baseStream_.Position = destinationPosition;
workFile.WriteLocalEntryHeader(update);
destinationPosition = baseStream_.Position;
}
long sourcePosition = 0;
const int NameLengthOffset = 26;
// TODO: Add base for SFX friendly handling
long entryDataOffset = update.Entry.Offset + NameLengthOffset;
baseStream_.Seek(entryDataOffset, SeekOrigin.Begin);
// Clumsy way of handling retrieving the original name and extra data length for now.
uint nameLength = ReadLEUshort();
uint extraLength = ReadLEUshort();
sourcePosition = baseStream_.Position + nameLength + extraLength;
if ( skipOver ) {
destinationPosition +=
(sourcePosition - entryDataOffset) + NameLengthOffset + // Header size
update.Entry.CompressedSize + GetDescriptorSize(update);
}
else {
if ( update.Entry.CompressedSize > 0 ) {
CopyEntryDataDirect(update, baseStream_, false, ref destinationPosition, ref sourcePosition );
}
CopyDescriptorBytesDirect(update, baseStream_, ref destinationPosition, sourcePosition);
}
}
void AddEntry(ZipFile workFile, ZipUpdate update)
{
long dataStart = 0;
Stream source = null;
if ( update.Entry.IsFile ) {
source = update.GetSource();
if ( source == null ) {
source = updateDataSource_.GetSource(update.Entry, update.Filename);
}
}
if ( source != null ) {
using ( source ) {
long sourceStreamLength = source.Length;
if ( update.OutEntry.Size < 0 ) {
update.OutEntry.Size = sourceStreamLength;
}
else {
// Check for errant entries.
if ( update.OutEntry.Size != sourceStreamLength ) {
throw new ZipException("Entry size/stream size mismatch");
}
}
workFile.WriteLocalEntryHeader(update);
dataStart = workFile.baseStream_.Position;
using ( Stream output = workFile.GetOutputStream(update.OutEntry) ) {
CopyBytes(update, output, source, sourceStreamLength, true);
}
}
}
else {
workFile.WriteLocalEntryHeader(update);
dataStart = workFile.baseStream_.Position;
}
long dataEnd = workFile.baseStream_.Position;
update.OutEntry.CompressedSize = dataEnd - dataStart;
}
private void ModifyEntry(ZipFile workFile, ZipUpdate update)
{
workFile.WriteLocalEntryHeader(update);
var position = workFile._baseStream.Position;
if (update.Entry.IsFile && (update.Filename != null))
{
using (var stream = workFile.GetOutputStream(update.OutEntry))
{
using (var stream2 = GetInputStream(update.Entry))
{
CopyBytes(update, stream, stream2, stream2.Length, true);
}
}
}
var num2 = workFile._baseStream.Position;
update.Entry.CompressedSize = num2 - position;
}
private void CopyEntryDirect(ZipFile workFile, ZipUpdate update, ref long destinationPosition)
{
var flag = update.Entry.Offset == destinationPosition;
if (!flag)
{
_baseStream.Position = destinationPosition;
workFile.WriteLocalEntryHeader(update);
destinationPosition = _baseStream.Position;
}
var offset = update.Entry.Offset + 0x1aL;
_baseStream.Seek(offset, SeekOrigin.Begin);
uint num3 = ReadLeUshort();
uint num4 = ReadLeUshort();
var sourcePosition = (_baseStream.Position + num3) + num4;
if (flag)
{
if (update.OffsetBasedSize != -1L)
{
destinationPosition += update.OffsetBasedSize;
}
else
{
destinationPosition += (((sourcePosition - offset) + 0x1aL) + update.Entry.CompressedSize) + GetDescriptorSize(update);
}
}
else
{
if (update.Entry.CompressedSize > 0L)
{
CopyEntryDataDirect(update, _baseStream, false, ref destinationPosition, ref sourcePosition);
}
CopyDescriptorBytesDirect(update, _baseStream, ref destinationPosition, sourcePosition);
}
}
private void CopyEntry(ZipFile workFile, ZipUpdate update)
{
workFile.WriteLocalEntryHeader(update);
if (update.Entry.CompressedSize > 0L)
{
var offset = update.Entry.Offset + 0x1aL;
_baseStream.Seek(offset, SeekOrigin.Begin);
uint num2 = ReadLeUshort();
uint num3 = ReadLeUshort();
_baseStream.Seek(num2 + num3, SeekOrigin.Current);
CopyBytes(update, workFile._baseStream, _baseStream, update.Entry.CompressedSize, false);
}
CopyDescriptorBytes(update, workFile._baseStream, _baseStream);
}
private void AddEntry(ZipFile workFile, ZipUpdate update)
{
Stream source = null;
if (update.Entry.IsFile)
{
source = update.GetSource();
if (source == null)
{
source = _updateDataSource.GetSource(update.Entry, update.Filename);
}
}
if (source != null)
{
using (source)
{
var length = source.Length;
if (update.OutEntry.Size < 0L)
{
update.OutEntry.Size = length;
}
else if (update.OutEntry.Size != length)
{
throw new ZipException("Entry size/stream size mismatch");
}
workFile.WriteLocalEntryHeader(update);
var position = workFile._baseStream.Position;
using (var stream2 = workFile.GetOutputStream(update.OutEntry))
{
CopyBytes(update, stream2, source, length, true);
}
var num3 = workFile._baseStream.Position;
update.OutEntry.CompressedSize = num3 - position;
if ((update.OutEntry.Flags & 8) == 8)
{
new ZipHelperStream(workFile._baseStream).WriteDataDescriptor(update.OutEntry);
}
return;
}
}
workFile.WriteLocalEntryHeader(update);
update.OutEntry.CompressedSize = 0L;
}