/// <nodoc />
public static Possible <ObservedPathSet, DeserializeFailure> TryDeserialize(
PathTable pathTable,
BuildXLReader reader,
PathExpander pathExpander = null,
Func <BuildXLReader, AbsolutePath> pathReader = null,
Func <BuildXLReader, StringId> stringReader = null)
{
PathTable.ExpandedAbsolutePathComparer comparer = pathTable.ExpandedPathComparer;
int pathCount = reader.ReadInt32Compact();
ObservedPathEntry[] paths = new ObservedPathEntry[pathCount];
string lastStr = null;
AbsolutePath lastPath = default(AbsolutePath);
for (int i = 0; i < pathCount; i++)
{
var flags = (ObservedPathEntryFlags)reader.ReadByte();
string enumeratePatternRegex = null;
if ((flags & ObservedPathEntryFlags.DirectoryEnumerationWithCustomPattern) != 0)
{
enumeratePatternRegex = reader.ReadString();
}
else if ((flags & ObservedPathEntryFlags.DirectoryEnumerationWithAllPattern) != 0)
{
enumeratePatternRegex = RegexDirectoryMembershipFilter.AllowAllRegex;
}
AbsolutePath newPath;
string full = null;
if (pathReader != null)
{
newPath = pathReader(reader);
}
else
{
int reuseCount = reader.ReadInt32Compact();
if (reuseCount == 0)
{
full = reader.ReadString();
}
else
{
if (lastStr == null || lastStr.Length < reuseCount)
{
// This path set is invalid.
return(new DeserializeFailure($"Invalid reuseCount: {reuseCount}; last: '{lastStr}', last string length: {lastStr?.Length}"));
}
string partial = reader.ReadString();
full = lastStr.Substring(0, reuseCount) + partial;
}
if (!AbsolutePath.TryCreate(pathTable, full, out newPath))
{
// It might be failed due to the tokenized path.
if (pathExpander == null || !pathExpander.TryCreatePath(pathTable, full, out newPath))
{
return(new DeserializeFailure($"Invalid path: '{full}'"));
}
}
}
paths[i] = new ObservedPathEntry(newPath, flags, enumeratePatternRegex);
if (lastPath.IsValid)
{
#if DEBUG
if (comparer.Compare(lastPath, newPath) >= 0)
{
return(new DeserializeFailure($"Paths not sorted: " +
$"old = '{lastPath.ToString(pathTable)}', new = '{newPath.ToString(pathTable)}';" +
$"old str = '{lastStr}', new str = '{full}'"));
}
#endif
}
lastPath = newPath;
lastStr = full;
}
int fileNameCount = reader.ReadInt32Compact();
StringId[] fileNames = new StringId[fileNameCount];
for (int i = 0; i < fileNameCount; i++)
{
fileNames[i] = stringReader?.Invoke(reader) ?? StringId.Create(pathTable.StringTable, reader.ReadString());
}
// Read unsafe options
var unsafeOptions = UnsafeOptions.TryDeserialize(reader);
if (unsafeOptions == null)
{
return(new DeserializeFailure("UnsafeOptions are null"));
}
// Note that we validated sort order above.
return(new ObservedPathSet(
SortedReadOnlyArray <ObservedPathEntry, ObservedPathEntryExpandedPathComparer> .FromSortedArrayUnsafe(
ReadOnlyArray <ObservedPathEntry> .FromWithoutCopy(paths),
new ObservedPathEntryExpandedPathComparer(comparer)),
SortedReadOnlyArray <StringId, CaseInsensitiveStringIdComparer> .FromSortedArrayUnsafe(
ReadOnlyArray <StringId> .FromWithoutCopy(fileNames),
new CaseInsensitiveStringIdComparer(pathTable.StringTable)),
unsafeOptions));
}