public List <RegionArea> GetRegionAreas()
{
RegionAreas = new List <RegionArea>();
if (!string.IsNullOrEmpty(Text))
{
bool searchingRegionStart = true;
StringLineReader reader = new StringLineReader(Text);
string line;
RegionArea regionArea = null;
int index = 0;
while ((line = reader.ReadLine()) != null)
{
line = line.Trim();
if (searchingRegionStart)
{
if (line.StartsWith("#region", StringComparison.InvariantCulture))
{
searchingRegionStart = false;
regionArea = new RegionArea(this, index);
if (line.Length > 8)
{
regionArea.RegionName = line.Substring(8);
}
}
}
else
{
if (line.StartsWith("#endregion", StringComparison.InvariantCulture))
{
searchingRegionStart = true;
regionArea.RegionEndIndex = reader.Position - 1;
RegionAreas.Add(regionArea);
}
}
index = reader.Position;
}
}
return(RegionAreas);
}
public List<RegionArea> GetRegionAreas()
{
RegionAreas = new List<RegionArea>();
if (!string.IsNullOrEmpty(Text))
{
bool searchingRegionStart = true;
StringLineReader reader = new StringLineReader(Text);
string line;
RegionArea regionArea = null;
int index = 0;
while ((line = reader.ReadLine()) != null)
{
line = line.Trim();
if (searchingRegionStart)
{
if (line.StartsWith("#region", StringComparison.InvariantCulture))
{
searchingRegionStart = false;
regionArea = new RegionArea(this, index);
if (line.Length > 8) regionArea.RegionName = line.Substring(8);
}
}
else
{
if (line.StartsWith("#endregion", StringComparison.InvariantCulture))
{
searchingRegionStart = true;
regionArea.RegionEndIndex = reader.Position - 1;
RegionAreas.Add(regionArea);
}
}
index = reader.Position;
}
}
return RegionAreas;
}
private static bool TryParseRevision(GitModule module, ArraySegment <byte> chunk, StringPool stringPool, Encoding logOutputEncoding, out GitRevision revision)
{
// The 'chunk' of data contains a complete git log item, encoded.
// This method decodes that chunk and produces a revision object.
// All values which can be read directly from the byte array are arranged
// at the beginning of the chunk. The latter part of the chunk will require
// decoding as a string.
if (chunk.Count == 0)
{
// "git log -z --name-only" returns multiple consecutive null bytes when logging
// the history of a single file. Haven't worked out why, but it's safe to skip
// such chunks.
revision = default;
return(false);
}
#region Object ID, Tree ID, Parent IDs
// The first 40 bytes are the revision ID and the tree ID back to back
if (!ObjectId.TryParseAsciiHexBytes(chunk, 0, out var objectId) ||
!ObjectId.TryParseAsciiHexBytes(chunk, ObjectId.Sha1CharCount, out var treeId))
{
revision = default;
return(false);
}
var array = chunk.Array;
var offset = chunk.Offset + (ObjectId.Sha1CharCount * 2);
var lastOffset = chunk.Offset + chunk.Count;
// Next we have zero or more parent IDs separated by ' ' and terminated by '\n'
var parentIds = new ObjectId[CountParents(offset)];
var parentIndex = 0;
int CountParents(int baseOffset)
{
if (array[baseOffset] == '\n')
{
return(0);
}
var count = 1;
while (true)
{
baseOffset += ObjectId.Sha1CharCount;
var c = array[baseOffset];
if (c != ' ')
{
break;
}
count++;
baseOffset++;
}
return(count);
}
while (true)
{
if (offset >= lastOffset - ObjectId.Sha1CharCount - 1)
{
revision = default;
return(false);
}
var b = array[offset];
if (b == '\n')
{
// There are no more parent IDs
offset++;
break;
}
if (b == ' ')
{
// We are starting a new parent ID
offset++;
}
if (!ObjectId.TryParseAsciiHexBytes(array, offset, out var parentId))
{
// TODO log this parse problem
revision = default;
return(false);
}
parentIds[parentIndex++] = parentId;
offset += ObjectId.Sha1CharCount;
}
#endregion
#region Timestamps
// Lines 2 and 3 are timestamps, as decimal ASCII seconds since the unix epoch, each terminated by `\n`
var authorDate = ParseUnixDateTime();
var commitDate = ParseUnixDateTime();
DateTime ParseUnixDateTime()
{
long unixTime = 0;
while (true)
{
var c = array[offset++];
if (c == '\n')
{
return(DateTimeUtils.UnixEpoch.AddTicks(unixTime * TimeSpan.TicksPerSecond).ToLocalTime());
}
unixTime = (unixTime * 10) + (c - '0');
}
}
#endregion
#region Encoding
// Line is the name of the encoding used by git, or an empty string, terminated by `\n`
string encodingName;
Encoding encoding;
var encodingNameEndOffset = Array.IndexOf(array, (byte)'\n', offset);
if (encodingNameEndOffset == -1)
{
// TODO log this error case
revision = default;
return(false);
}
if (offset == encodingNameEndOffset)
{
// No encoding specified
encoding = logOutputEncoding;
encodingName = null;
}
else
{
encodingName = logOutputEncoding.GetString(array, offset, encodingNameEndOffset - offset);
encoding = module.GetEncodingByGitName(encodingName);
}
offset = encodingNameEndOffset + 1;
#endregion
#region Encoded string values (names, emails, subject, body, name)
// Finally, decode the names, email, subject and body strings using the required text encoding
var s = encoding.GetString(array, offset, lastOffset - offset);
var reader = new StringLineReader(s);
var author = reader.ReadLine(stringPool);
var authorEmail = reader.ReadLine(stringPool);
var committer = reader.ReadLine(stringPool);
var committerEmail = reader.ReadLine(stringPool);
var subject = reader.ReadLine(advance: false);
if (author == null || authorEmail == null || committer == null || committerEmail == null || subject == null)
{
// TODO log this parse error
Debug.Fail("Unable to read an entry from the log -- this should not happen");
revision = default;
return(false);
}
// NOTE the convention is that the Subject string is duplicated at the start of the Body string
// Therefore we read the subject twice.
// If there are not enough characters remaining for a body, then just assign the subject string directly.
var body = reader.Remaining - subject.Length == 2 ? subject : reader.ReadToEnd();
if (body == null)
{
// TODO log this parse error
Debug.Fail("Unable to read body from the log -- this should not happen");
revision = default;
return(false);
}
var indexOfEndOfBody = body.LastIndexOf(EndOfBody, StringComparison.InvariantCulture);
string additionalData = null;
var bodyContainsAdditionalData = body.Length > indexOfEndOfBody + EndOfBody.Length;
if (bodyContainsAdditionalData)
{
additionalData = body.Substring(indexOfEndOfBody + EndOfBody.Length).TrimStart();
}
body = body.Substring(0, indexOfEndOfBody);
#endregion
revision = new GitRevision(objectId)
{
ParentIds = parentIds,
TreeGuid = treeId,
Author = author,
AuthorEmail = authorEmail,
AuthorDate = authorDate,
Committer = committer,
CommitterEmail = committerEmail,
CommitDate = commitDate,
MessageEncoding = encodingName,
Subject = subject,
Body = body,
Name = additionalData,
HasMultiLineMessage = !ReferenceEquals(subject, body),
HasNotes = false
};
return(true);
}
private static bool TryParseRevision(GitModule module, ArraySegment <byte> chunk, StringPool stringPool, Encoding logOutputEncoding, out GitRevision revision)
{
// The 'chunk' of data contains a complete git log item, encoded.
// This method decodes that chunk and produces a revision object.
// All values which can be read directly from the byte array are arranged
// at the beginning of the chunk. The latter part of the chunk will require
// decoding as a string.
#region Object ID, Tree ID, Parent IDs
// The first 40 bytes are the revision ID and the tree ID back to back
if (!ObjectId.TryParseAsciiHexBytes(chunk, 0, out var objectId) ||
!ObjectId.TryParseAsciiHexBytes(chunk, ObjectId.Sha1CharCount, out var treeId))
{
revision = default;
return(false);
}
var objectIdStr = objectId.ToString();
var array = chunk.Array;
var offset = chunk.Offset + (ObjectId.Sha1CharCount * 2);
var lastOffset = chunk.Offset + chunk.Count;
// Next we have zero or more parent IDs separated by ' ' and terminated by '\n'
var parentIds = new List <ObjectId>(capacity: 1);
while (true)
{
if (offset >= lastOffset - 21)
{
revision = default;
return(false);
}
var b = array[offset];
if (b == '\n')
{
// There are no more parent IDs
offset++;
break;
}
if (b == ' ')
{
// We are starting a new parent ID
offset++;
}
if (!ObjectId.TryParseAsciiHexBytes(array, offset, out var parentId))
{
// TODO log this parse problem
revision = default;
return(false);
}
parentIds.Add(parentId);
offset += ObjectId.Sha1CharCount;
}
#endregion
#region Timestamps
// Lines 2 and 3 are timestamps, as decimal ASCII seconds since the unix epoch, each terminated by `\n`
var authorDate = ParseUnixDateTime();
var commitDate = ParseUnixDateTime();
DateTime ParseUnixDateTime()
{
long unixTime = 0;
while (true)
{
var c = array[offset++];
if (c == '\n')
{
return(DateTimeUtils.UnixEpoch.AddTicks(unixTime * TimeSpan.TicksPerSecond).ToLocalTime());
}
unixTime = (unixTime * 10) + (c - '0');
}
}
#endregion
#region Encoding
// Line is the name of the encoding used by git, or an empty string, terminated by `\n`
string encodingName;
Encoding encoding;
var encodingNameEndOffset = Array.IndexOf(array, (byte)'\n', offset);
if (encodingNameEndOffset == -1)
{
// TODO log this error case
revision = default;
return(false);
}
if (offset == encodingNameEndOffset)
{
// No encoding specified
encoding = logOutputEncoding;
encodingName = null;
}
else
{
encodingName = logOutputEncoding.GetString(array, offset, encodingNameEndOffset - offset);
encoding = module.GetEncodingByGitName(encodingName);
}
offset = encodingNameEndOffset + 1;
#endregion
#region Encoded string valies (names, emails, subject, body)
// Finally, decode the names, email, subject and body strings using the required text encoding
var s = encoding.GetString(array, offset, lastOffset - offset);
var reader = new StringLineReader(s);
var author = reader.ReadLine(stringPool);
var authorEmail = reader.ReadLine(stringPool);
var committer = reader.ReadLine(stringPool);
var committerEmail = reader.ReadLine(stringPool);
// NOTE the convention is that the Body property contain a copy of Subject
// Therefore we read the subject twice
var subject = reader.ReadLine(advance: false);
var body = reader.ReadToEnd();
if (author == null || authorEmail == null || committer == null || committerEmail == null || subject == null || body == null)
{
// TODO log this parse error
Debug.Fail("Unable to read an entry from the log -- this should not happen");
revision = default;
return(false);
}
#endregion
revision = new GitRevision(null)
{
// TODO are we really sure we can't make Revision.Guid an ObjectId?
Guid = objectIdStr,
// TODO take IReadOnlyList<ObjectId> instead
ParentGuids = parentIds.ToArray(p => p.ToString()),
TreeGuid = treeId,
Author = author,
AuthorEmail = authorEmail,
AuthorDate = authorDate,
Committer = committer,
CommitterEmail = committerEmail,
CommitDate = commitDate,
MessageEncoding = encodingName,
Subject = subject,
Body = body,
HasMultiLineMessage = !string.IsNullOrWhiteSpace(body)
};
return(true);
}
