// Write the local file header
// TODO: BlubbHelperStream.WriteLocalHeader is not yet used and needs checking for BlubbFile and BlubbOuptutStream usage
void WriteLocalHeader( BlubbZipEntry entry, EntryPatchData patchData ) {
CompressionMethod method = entry.CompressionMethod;
bool headerInfoAvailable = true; // How to get this?
bool patchEntryHeader = false;
WriteLEInt( BlubbZipConstants.LocalHeaderSignature );
WriteLEShort( entry.Version );
WriteLEShort( entry.Flags );
WriteLEShort( (byte)method );
WriteLEInt( (int)entry.DosTime );
if( headerInfoAvailable == true ) {
WriteLEInt( (int)entry.Crc );
if( entry.LocalHeaderRequiresBlubb64 ) {
WriteLEInt( -1 );
WriteLEInt( -1 );
} else {
WriteLEInt( entry.IsCrypted ? (int)entry.CompressedSize + BlubbZipConstants.CryptoHeaderSize : (int)entry.CompressedSize );
WriteLEInt( (int)entry.Size );
}
} else {
if( patchData != null ) {
patchData.CrcPatchOffset = stream_.Position;
}
WriteLEInt( 0 ); // Crc
if( patchData != null ) {
patchData.SizePatchOffset = stream_.Position;
}
// For local header both sizes appear in Blubb64 Extended Information
if( entry.LocalHeaderRequiresBlubb64 && patchEntryHeader ) {
WriteLEInt( -1 );
WriteLEInt( -1 );
} else {
WriteLEInt( 0 ); // Compressed size
WriteLEInt( 0 ); // Uncompressed size
}
}
byte[] name = BlubbZipConstants.ConvertToArray( entry.Flags, entry.Name );
if( name.Length > 0xFFFF ) {
throw new BlubbZipException( "Entry name too long." );
}
BlubbZipExtraData ed = new BlubbZipExtraData( entry.ExtraData );
if( entry.LocalHeaderRequiresBlubb64 && ( headerInfoAvailable || patchEntryHeader ) ) {
ed.StartNewEntry();
if( headerInfoAvailable ) {
ed.AddLeLong( entry.Size );
ed.AddLeLong( entry.CompressedSize );
} else {
ed.AddLeLong( -1 );
ed.AddLeLong( -1 );
}
ed.AddNewEntry( 1 );
if( !ed.Find( 1 ) ) {
throw new BlubbZipException( "Internal error cant find extra data" );
}
if( patchData != null ) {
patchData.SizePatchOffset = ed.CurrentReadIndex;
}
} else {
ed.Delete( 1 );
}
byte[] extra = ed.GetEntryData();
WriteLEShort( name.Length );
WriteLEShort( extra.Length );
if( name.Length > 0 ) {
stream_.Write( name, 0, name.Length );
}
if( entry.LocalHeaderRequiresBlubb64 && patchEntryHeader ) {
patchData.SizePatchOffset += stream_.Position;
}
if( extra.Length > 0 ) {
stream_.Write( extra, 0, extra.Length );
}
}
// Write the local file header
// TODO: BlubbHelperStream.WriteLocalHeader is not yet used and needs checking for BlubbFile and BlubbOuptutStream usage
void WriteLocalHeader(BlubbZipEntry entry, EntryPatchData patchData)
{
CompressionMethod method = entry.CompressionMethod;
bool headerInfoAvailable = true; // How to get this?
bool patchEntryHeader = false;
WriteLEInt(BlubbZipConstants.LocalHeaderSignature);
WriteLEShort(entry.Version);
WriteLEShort(entry.Flags);
WriteLEShort((byte)method);
WriteLEInt((int)entry.DosTime);
if (headerInfoAvailable == true)
{
WriteLEInt((int)entry.Crc);
if (entry.LocalHeaderRequiresBlubb64)
{
WriteLEInt(-1);
WriteLEInt(-1);
}
else
{
WriteLEInt(entry.IsCrypted ? (int)entry.CompressedSize + BlubbZipConstants.CryptoHeaderSize : (int)entry.CompressedSize);
WriteLEInt((int)entry.Size);
}
}
else
{
if (patchData != null)
{
patchData.CrcPatchOffset = stream_.Position;
}
WriteLEInt(0); // Crc
if (patchData != null)
{
patchData.SizePatchOffset = stream_.Position;
}
// For local header both sizes appear in Blubb64 Extended Information
if (entry.LocalHeaderRequiresBlubb64 && patchEntryHeader)
{
WriteLEInt(-1);
WriteLEInt(-1);
}
else
{
WriteLEInt(0); // Compressed size
WriteLEInt(0); // Uncompressed size
}
}
byte[] name = BlubbZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xFFFF)
{
throw new BlubbZipException("Entry name too long.");
}
BlubbZipExtraData ed = new BlubbZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresBlubb64 && (headerInfoAvailable || patchEntryHeader))
{
ed.StartNewEntry();
if (headerInfoAvailable)
{
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
}
else
{
ed.AddLeLong(-1);
ed.AddLeLong(-1);
}
ed.AddNewEntry(1);
if (!ed.Find(1))
{
throw new BlubbZipException("Internal error cant find extra data");
}
if (patchData != null)
{
patchData.SizePatchOffset = ed.CurrentReadIndex;
}
}
else
{
ed.Delete(1);
}
byte[] extra = ed.GetEntryData();
WriteLEShort(name.Length);
WriteLEShort(extra.Length);
if (name.Length > 0)
{
stream_.Write(name, 0, name.Length);
}
if (entry.LocalHeaderRequiresBlubb64 && patchEntryHeader)
{
patchData.SizePatchOffset += stream_.Position;
}
if (extra.Length > 0)
{
stream_.Write(extra, 0, extra.Length);
}
}
