////////////////////////////////////////////////////////////////////
// Test Single File
////////////////////////////////////////////////////////////////////
private Int32 TestZip()
{
// add extension to compressed file name
CompFileName += ".zip";
// create compressiom object
DeflateZipFile Def = new DeflateZipFile(CompLevel);
// create empty zip file
if (Def.CreateArchive(CompFileName))
{
// save exception stack on error
ExceptionStack = Def.ExceptionStack;
return(1);
}
// split the input file name to path and name
String FileName;
Int32 Ptr = InputFileName.LastIndexOf('\\');
FileName = Ptr < 0 ? InputFileName : InputFileName.Substring(Ptr + 1);
// save start time
Int32 StartTime = Environment.TickCount;
// compress file
if (Def.Compress(InputFileName, FileName))
{
// save exception stack on error
ExceptionStack = Def.ExceptionStack;
return(1);
}
// save compression elapse time
CompTime = Environment.TickCount - StartTime;
// save input and compressed file length
InputFileLen = Def.ReadTotal;
CompFileLen = Def.WriteTotal;
// save archive
if (Def.SaveArchive())
{
// save exception stack on error
ExceptionStack = Def.ExceptionStack;
return(1);
}
// save start time
StartTime = Environment.TickCount;
// create decompression object
InflateZipFile Inf = new InflateZipFile();
// open the zip file
if (Inf.OpenZipFile(CompFileName))
{
// save exception stack on error
ExceptionStack = Inf.ExceptionStack;
return(2);
}
// decompress the file
if (Inf.DecompressZipFile(Inf.ZipDir[0], null, DecompFileName, false, true))
{
// save exception stack on error
ExceptionStack = Inf.ExceptionStack;
return(2);
}
// save decompression elapse time
DecompTime = Environment.TickCount - StartTime;
// save restored file length
DecompFileLen = Inf.WriteTotal;
// close the zip file
Inf.CloseZipFile();
// successful exit
return(0);
}
/////////////////////////////////////////////////////////////////
// Extract file
/////////////////////////////////////////////////////////////////
private Boolean ExtractFile()
{
// translate to file header
FileHeader FH = ZipDir[DirIndex];
// test skip read only
if (ProgramState.State.SkipReadOnly && (FH.FileAttr & FileAttributes.ReadOnly) != 0)
{
AppendStatus("Skip read only");
return(true);
}
// test skip hidden file
if (ProgramState.State.SkipHidden && (FH.FileAttr & FileAttributes.Hidden) != 0)
{
AppendStatus("Skip hidden file");
return(true);
}
// test skip system file
if (ProgramState.State.SkipSystem && (FH.FileAttr & FileAttributes.System) != 0)
{
AppendStatus("Skip system file");
return(true);
}
// file name
String FileName = (FH.Path && ProgramState.State.IgnoreFolderInfo) ?
FH.FileName.Substring(FH.FileName.LastIndexOf('\\') + 1) : FH.FileName;
// full ourput file name
String OutputFile = ProgramState.State.ExtractToFolder + "\\" + FileName;
// path part of file name
Int32 Ptr = OutputFile.LastIndexOf('\\');
// we have a path, make sure path exists
if (Ptr >= 0)
{
// skip older files
if (ProgramState.State.SkipOlder)
{
// exiting file
DateTime ExistingFileTime = File.GetLastWriteTime(OutputFile);
// compressed file
// convert dos file date and time to DateTime format
DateTime CompFileTime = new DateTime(1980 + ((FH.FileDate >> 9) & 0x7f), (FH.FileDate >> 5) & 0xf, FH.FileDate & 0x1f,
(FH.FileTime >> 11) & 0x1f, (FH.FileTime >> 5) & 0x3f, 2 * (FH.FileTime & 0x1f));
// compare times
if (CompFileTime < ExistingFileTime)
{
AppendStatus("Skip too old");
return(true);
}
}
// make sure directory exists
if (!Directory.Exists(OutputFile.Substring(0, Ptr)))
{
// make new folder
try
{
Directory.CreateDirectory(OutputFile.Substring(0, Ptr));
}
catch
{
AppendStatus("Path Error");
return(true);
}
}
// directory
if ((FH.FileAttr & FileAttributes.Directory) != 0)
{
AppendStatus("Dir-OK");
return(false);
}
}
// test if file exists
if (File.Exists(OutputFile))
{
// no overwrite
if (ProgramState.State.Overwrite == (Int32)OverwriteFiles.No)
{
AppendStatus("No overwrite");
return(true);
}
// ask overwrite permission
if (ProgramState.State.Overwrite == (Int32)OverwriteFiles.Ask)
{
if (MessageBox.Show(this, "Do you want to overwrite: " + OutputFile + " ?\n(Press Cancel to abort extraction)", "Overwrite warning",
MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question) == DialogResult.Cancel)
{
AppendStatus("No overwrite");
return(true);
}
}
// check for read only file
if (!ProgramState.State.SkipReadOnly)
{
FileAttributes Attr = File.GetAttributes(OutputFile);
if ((Attr & FileAttributes.ReadOnly) != 0)
{
try
{
File.SetAttributes(OutputFile, Attr & ~FileAttributes.ReadOnly);
}
catch {}
}
}
// delete file
try
{
File.Delete(OutputFile);
}
catch
{
AppendStatus("Overwrite failed");
return(true);
}
}
// decompress file
if (Inflate.DecompressZipFile(FH, null, OutputFile, true, true))
{
Trace.Write("Decompression Error\n" + Inflate.ExceptionStack[0] + "\n" + Inflate.ExceptionStack[1]);
AppendStatus("Decompression failed [" + Deflate.ExceptionStack[0] + "]");
return(true);
}
// successful return
AppendStatus("File-OK");
return(false);
}