public bool Equal(FileInfoEx fileB, FileCompareFlags flags)
{
FileCompareFlags equalFlags = (this.FileName == fileB.FileName) ? FileCompareFlags.UnrootedName : 0;
equalFlags |= this.FileInfoObj.EqualityFlags(fileB.FileInfoObj, flags);
return(equalFlags == flags);
}
//--------------------------------------------------------------------------------
public static FileCompareFlags EqualityFlags(this FileInfo fileA, FileInfo fileB, FileCompareFlags flags)
{
FileCompareFlags equalFlags = FileCompareFlags.All;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.Attributes) && fileA.Attributes == fileB.Attributes) ? FileCompareFlags.Attributes : 0;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.Created) && fileA.CreationTime == fileB.CreationTime) ? FileCompareFlags.Created : 0;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.CreatedUTC) && fileA.CreationTimeUtc == fileB.CreationTimeUtc) ? FileCompareFlags.CreatedUTC : 0;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.Extension) && fileA.Extension == fileB.Extension) ? FileCompareFlags.Extension : 0;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.LastAccess) && fileA.LastAccessTime == fileB.LastAccessTime) ? FileCompareFlags.LastAccess : 0;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.LastAccessUTC) && fileA.LastAccessTimeUtc == fileB.LastAccessTimeUtc) ? FileCompareFlags.LastAccessUTC : 0;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.LastWrite) && fileA.LastWriteTime == fileB.LastWriteTime) ? FileCompareFlags.LastWrite : 0;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.LastWriteUTC) && fileA.LastWriteTimeUtc == fileB.LastWriteTimeUtc) ? FileCompareFlags.LastWriteUTC : 0;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.Length) && fileA.Length == fileB.Length) ? FileCompareFlags.Length : 0;
equalFlags |= (FlagIsSet(flags, FileCompareFlags.FullName) && fileA.FullName == fileB.FullName) ? FileCompareFlags.FullName : 0;
return(equalFlags);
}
//--------------------------------------------------------------------------------
/// <summary>
/// Determines if the specified file is "equal" to this file, bsased on the
/// specified comparison properties
/// </summary>
/// <param name="fileB">The file to be compared</param>
/// <param name="flags">The properties to be compared for equality</param>
/// <returns></returns>
public bool Equal(FileInfoEx fileB, FileCompareFlags flags)
{
// assume no matches
FileCompareFlags equalFlags = 0;
// first, we compare the unrooted name (the filename without the
// root from/to path)
if ((flags & FileCompareFlags.UnrootedName) == FileCompareFlags.UnrootedName)
{
equalFlags = (this.FileName == fileB.FileName) ? FileCompareFlags.UnrootedName : 0;
}
// and then we compare the actual FileInfo properties
equalFlags |= this.FileInfoObj.EqualityFlags(fileB.FileInfoObj, flags);
// if the flags that are set here are equal to the flags specified, this
// method will return true
return(equalFlags == flags);
}
public bool NewOrChanged(FileInfoEx newFile)
{
var newCount = (from oldFile in this
where oldFile.FileName == newFile.FileName
select oldFile).Count();
bool isNew = (newCount == 0);
FileCompareFlags flags = FileCompareFlags.UnrootedName |
FileCompareFlags.LastWrite |
FileCompareFlags.Length;
var oldCount = (from oldFile in this
//where ((oldFile.FileName == newFile.FileName) && (oldFile.FileInfoObj.LastWriteTime != newFile.FileInfoObj.LastWriteTime || oldFile.FileInfoObj.Length != newFile.FileInfoObj.Length))
where oldFile.Equal(newFile, flags)
select oldFile).Count();
bool isChanged = (oldCount > 0);
return(isNew || isChanged);
}
//--------------------------------------------------------------------------------
public static bool Equal(this FileInfo fileA, FileInfo fileB, FileCompareFlags flags)
{
bool isEqual = (fileA.EqualityFlags(fileB, flags) == flags);
return(isEqual);
}
//////////////////////////////////////////////////////////////////////////////////
// FileInfo methods
//--------------------------------------------------------------------------------
private static bool FlagIsSet(FileCompareFlags flags, FileCompareFlags flag)
{
bool isSet = ((flags & flag) == flag);
return(isSet);
}
