static Tuple<string, CompressionOption> GetCurrentFileNameAndCompression(UnzipHandle handle)
{
UnzipFileInfo info;
string filename = String.Empty;
int result = unzGetCurrentFileInfo (handle, out info, null, IntPtr.Zero, IntPtr.Zero, new IntPtr (0), null, IntPtr.Zero);
if (result != 0)
return null;
StringBuilder sbName = new StringBuilder ((int)info.SizeFilename+1); // +1 to account for extra \0 at the end
result = unzGetCurrentFileInfo (handle, out info, sbName, new IntPtr (sbName.Capacity), IntPtr.Zero, new IntPtr (0), null, IntPtr.Zero);
if (result != 0)
return null;
else
filename = sbName.ToString ();
int method, compression;
// '0' means do not open in raw mode (raw == do not decompress)
if (unzOpenCurrentFile2 (handle, out method, out compression, 0) != 0)
throw new Exception ("The file could not be opened");
CompressionOption level = ConvertCompression (method == 0 ? 0 : compression);
return Tuple.Create (filename, level);
}
public static long CurrentFileLength (UnzipHandle handle)
{
UnzipFileInfo info;
int result = unzGetCurrentFileInfo (handle, out info, null, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, null, IntPtr.Zero);
if (result != 0)
return -1;
else
return (long)info.UncompressedSize;
}
static string GetCurrentFileName32 (UnzipHandle handle)
{
UnzipFileInfo32 info;
if (unzGetCurrentFileInfo_32 (handle, out info, null, 0, IntPtr.Zero, 0, null, 0) != 0)
return null;
var sbName = new StringBuilder ((int) info.size_filename + 1); // +1 to account for extra \0 at the end
if (unzGetCurrentFileInfo_32 (handle, out info, sbName, (uint) sbName.Capacity, IntPtr.Zero, 0, null, 0) != 0)
return null;
return sbName.ToString ();
}
static string GetCurrentFileName (UnzipHandle handle)
{
UnzipFileInfo info;
StringBuilder sbName = new StringBuilder (128);
int result = unzGetCurrentFileInfo (handle, out info, sbName, new IntPtr (sbName.Capacity), IntPtr.Zero, new IntPtr (0), null, IntPtr.Zero);
if (result != 0)
return null;
else
return sbName.ToString ();
}
public static long CurrentFileLength (UnzipHandle handle)
{
UnzipFileInfo info;
StringBuilder sbName = new StringBuilder (128);
int result = unzGetCurrentFileInfo (handle, out info, sbName, new IntPtr (sbName.Capacity), IntPtr.Zero, IntPtr.Zero, null, IntPtr.Zero);
if (result != 0)
return -1;
else
return (long)info.UncompressedSize;
}
static string GetCurrentFileName (UnzipHandle handle)
{
UnzipFileInfo info;
int result = unzGetCurrentFileInfo (handle, out info, null, IntPtr.Zero, IntPtr.Zero, new IntPtr (0), null, IntPtr.Zero);
if (result != 0)
return null;
StringBuilder sbName = new StringBuilder ((int)info.SizeFilename+1); // +1 to account for extra \0 at the end
result = unzGetCurrentFileInfo (handle, out info, sbName, new IntPtr (sbName.Capacity), IntPtr.Zero, new IntPtr (0), null, IntPtr.Zero);
if (result != 0)
return null;
else
return sbName.ToString ();
}
static bool GoToNextFile (UnzipHandle handle)
{
return unzGoToNextFile(handle) == 0;
}
public static long CurrentFileLength64 (UnzipHandle handle)
{
UnzipFileInfo64 info;
int result = unzGetCurrentFileInfo_64 (handle, out info, null, 0, IntPtr.Zero, 0, null, 0);
return result != 0 ? -1 : (long) info.uncompressed_size;
}
public static void CloseArchive (UnzipHandle handle)
{
unzClose (handle);
handle.SetHandleAsInvalid ();
}
static unsafe extern int unzReadCurrentFile (UnzipHandle handle, byte* buf, // voidp uint len);
static extern int unzOpenCurrentFile2 (UnzipHandle handle, out int method, out int level, int raw);
static extern int unzGoToNextFile (UnzipHandle handle);
static extern int unzCloseCurrentFile (UnzipHandle handle);
static extern int unzOpenCurrentFile2(UnzipHandle handle,
out int method,
out int level,
int raw);
static extern int unzLocateFile(UnzipHandle handle,
string szFileName,
int iCaseSensitivity);
static extern int unzGoToNextFile(UnzipHandle handle);
static extern IntPtr unztell(UnzipHandle handle);
static extern int unzCloseCurrentFile(UnzipHandle handle);
static bool GoToNextFile(UnzipHandle handle)
{
return(unzGoToNextFile(handle) == 0);
}
public static string[] GetFiles64 (UnzipHandle handle)
{
return GetFiles (handle, GetCurrentFileName64);
}
public static void OpenFile (UnzipHandle handle, string name, out CompressionOption level)
{
if (unzLocateFile (handle, name, (int) ZipStringComparison.CaseInsensitive) != 0)
throw new Exception ("The file doesn't exist");
int method, compression;
// '0' means do not open in raw mode (raw == do not decompress)
if (unzOpenCurrentFile2 (handle, out method, out compression, 0) != 0)
throw new Exception ("The file could not be opened");
level = ConvertCompression (method == 0 ? 0 : compression);
}
public static unsafe int Read (UnzipHandle handle, byte[] buffer, int offset, int count)
{
if ((buffer.Length - offset) > count)
throw new ArgumentOutOfRangeException ("count", "Buffer is too small to read that amount of data");
fixed (byte * b = &buffer[offset])
return unzReadCurrentFile (handle, b, (uint)count);
}
static unsafe extern int unzReadCurrentFile(UnzipHandle handle,
byte *buf, // voidp
uint len);
static extern IntPtr unztell (UnzipHandle handle);
static extern int unzClose(UnzipHandle handle);
static extern int unzLocateFile (UnzipHandle handle, string szFileName, int iCaseSensitivity);
public static Dictionary<string, CompressionOption> GetFiles (UnzipHandle handle)
{
var result = new Dictionary<string, CompressionOption> ();
GoToFirstFile (handle);
Tuple<string, CompressionOption> info;
while ((info = GetCurrentFileNameAndCompression(handle)) != null)
{
result.Add (info.Item1, info.Item2);
if (!NativeUnzip.GoToNextFile (handle))
break;
}
return result;
}
static extern int unzGetCurrentFileInfo (UnzipHandle handle, out UnzipFileInfo pfile_info, StringBuilder szFileName, IntPtr fileNameBufferSize, // uLong IntPtr extraField, // void * IntPtr extraFieldBufferSize, // uLong StringBuilder szComment, IntPtr commentBufferSize); // uLong
public static long CurrentFilePosition (UnzipHandle handle)
{
return unztell(handle).ToInt64 ();
}
static extern int unzClose (UnzipHandle handle);
static void GoToFirstFile (UnzipHandle handle)
{
if (NativeUnzip.unzGoToFirstFile (handle) != 0)
throw new Exception ("Zip file is invalid");
}
public static void CloseCurrentFile (UnzipHandle handle)
{
if (unzCloseCurrentFile (handle) != 0)
throw new Exception ("Could not close the active file");
}
private static string[] GetFiles (UnzipHandle handle, Func<UnzipHandle, string> getCurrentFileName)
{
GoToFirstFile (handle);
var files = new List<string> ();
string name;
while ((name = getCurrentFileName (handle)) != null) {
files.Add (name);
if (!NativeUnzip.GoToNextFile (handle))
break;
}
return files.ToArray ();
}
public static void CloseArchive(UnzipHandle handle)
{
unzClose(handle);
handle.SetHandleAsInvalid();
}
public static long CurrentFilePosition(UnzipHandle handle)
{
return(unztell(handle).ToInt64());
}
public static string[] GetFiles (UnzipHandle handle)
{
List<string> files = new List<string> ();
GoToFirstFile (handle);
string name;
while ((name = GetCurrentFileName(handle)) != null)
{
files.Add (name);
if (!NativeUnzip.GoToNextFile (handle))
break;
}
return files.ToArray ();
}
public static string[] GetFiles64(UnzipHandle handle)
{
return(GetFiles(handle, GetCurrentFileName64));
}
