/// <exception cref="System.IO.IOException"></exception>
private void OnOpenPack()
{
PackIndex idx = Idx();
byte[] buf = new byte[20];
fd.Seek(0);
fd.ReadFully(buf, 0, 12);
if (RawParseUtils.Match(buf, 0, Constants.PACK_SIGNATURE) != 4)
{
throw new IOException(JGitText.Get().notAPACKFile);
}
long vers = NB.DecodeUInt32(buf, 4);
long packCnt = NB.DecodeUInt32(buf, 8);
if (vers != 2 && vers != 3)
{
throw new IOException(MessageFormat.Format(JGitText.Get().unsupportedPackVersion,
Sharpen.Extensions.ValueOf(vers)));
}
if (packCnt != idx.GetObjectCount())
{
throw new PackMismatchException(MessageFormat.Format(JGitText.Get().packObjectCountMismatch
, Sharpen.Extensions.ValueOf(packCnt), Sharpen.Extensions.ValueOf(idx.GetObjectCount
()), GetPackFile()));
}
fd.Seek(length - 20);
fd.ReadFully(buf, 0, 20);
if (!Arrays.Equals(buf, packChecksum))
{
throw new PackMismatchException(MessageFormat.Format(JGitText.Get().packObjectCountMismatch
, ObjectId.FromRaw(buf).Name, ObjectId.FromRaw(idx.packChecksum).Name, GetPackFile
()));
}
}
internal virtual int ParseTraditionalHeaders(int ptr, int end)
{
while (ptr < end)
{
int eol = RawParseUtils.NextLF(buf, ptr);
if (IsHunkHdr(buf, ptr, eol) >= 1)
{
// First hunk header; break out and parse them later.
break;
}
else
{
if (RawParseUtils.Match(buf, ptr, OLD_NAME) >= 0)
{
ParseOldName(ptr, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, NEW_NAME) >= 0)
{
ParseNewName(ptr, eol);
}
else
{
// Possibly an empty patch.
break;
}
}
}
ptr = eol;
}
return(ptr);
}
/// <summary>Check an annotated tag for errors.</summary>
/// <remarks>Check an annotated tag for errors.</remarks>
/// <param name="raw">the tag data. The array is never modified.</param>
/// <exception cref="NGit.Errors.CorruptObjectException">if any error was detected.</exception>
public virtual void CheckTag(byte[] raw)
{
int ptr = 0;
if ((ptr = RawParseUtils.Match(raw, ptr, @object)) < 0)
{
throw new CorruptObjectException("no object header");
}
if ((ptr = Id(raw, ptr)) < 0 || raw[ptr++] != '\n')
{
throw new CorruptObjectException("invalid object");
}
if ((ptr = RawParseUtils.Match(raw, ptr, type)) < 0)
{
throw new CorruptObjectException("no type header");
}
ptr = RawParseUtils.NextLF(raw, ptr);
if ((ptr = RawParseUtils.Match(raw, ptr, tag)) < 0)
{
throw new CorruptObjectException("no tag header");
}
ptr = RawParseUtils.NextLF(raw, ptr);
if ((ptr = RawParseUtils.Match(raw, ptr, tagger)) > 0)
{
if ((ptr = PersonIdent(raw, ptr)) < 0 || raw[ptr++] != '\n')
{
throw new CorruptObjectException("invalid tagger");
}
}
}
private static int SkipFile(byte[] buf, int ptr)
{
ptr = RawParseUtils.NextLF(buf, ptr);
if (RawParseUtils.Match(buf, ptr, FileHeader.OLD_NAME) >= 0)
{
ptr = RawParseUtils.NextLF(buf, ptr);
}
return(ptr);
}
private static bool MatchAny(byte[] buf, int c, byte[][] srcs)
{
foreach (byte[] s in srcs)
{
if (RawParseUtils.Match(buf, c, s) >= 0)
{
return(true);
}
}
return(false);
}
internal virtual int ParseHunk(int ptr, int end)
{
byte[] buf = file.buf;
if (RawParseUtils.Match(buf, ptr, LITERAL) >= 0)
{
type = BinaryHunk.Type.LITERAL_DEFLATED;
length = RawParseUtils.ParseBase10(buf, ptr + LITERAL.Length, null);
}
else
{
if (RawParseUtils.Match(buf, ptr, DELTA) >= 0)
{
type = BinaryHunk.Type.DELTA_DEFLATED;
length = RawParseUtils.ParseBase10(buf, ptr + DELTA.Length, null);
}
else
{
// Not a valid binary hunk. Signal to the caller that
// we cannot parse any further and that this line should
// be treated otherwise.
//
return(-1);
}
}
ptr = RawParseUtils.NextLF(buf, ptr);
// Skip until the first blank line; that is the end of the binary
// encoded information in this hunk. To save time we don't do a
// validation of the binary data at this point.
//
while (ptr < end)
{
bool empty = (buf[ptr] == '\n') || (buf[ptr] == '\r' && ptr + 1 < end && buf[ptr + 1] == '\n');
ptr = RawParseUtils.NextLF(buf, ptr);
if (empty)
{
break;
}
}
return(ptr);
}
/// <summary>Check a commit for errors.</summary>
/// <remarks>Check a commit for errors.</remarks>
/// <param name="raw">the commit data. The array is never modified.</param>
/// <exception cref="NGit.Errors.CorruptObjectException">if any error was detected.</exception>
public virtual void CheckCommit(byte[] raw)
{
int ptr = 0;
if ((ptr = RawParseUtils.Match(raw, ptr, tree)) < 0)
{
throw new CorruptObjectException("no tree header");
}
if ((ptr = Id(raw, ptr)) < 0 || raw[ptr++] != '\n')
{
throw new CorruptObjectException("invalid tree");
}
while (RawParseUtils.Match(raw, ptr, parent) >= 0)
{
ptr += parent.Length;
if ((ptr = Id(raw, ptr)) < 0 || raw[ptr++] != '\n')
{
throw new CorruptObjectException("invalid parent");
}
}
if ((ptr = RawParseUtils.Match(raw, ptr, author)) < 0)
{
throw new CorruptObjectException("no author");
}
if ((ptr = PersonIdent(raw, ptr)) < 0 || raw[ptr++] != '\n')
{
throw new CorruptObjectException("invalid author");
}
if ((ptr = RawParseUtils.Match(raw, ptr, committer)) < 0)
{
throw new CorruptObjectException("no committer");
}
if ((ptr = PersonIdent(raw, ptr)) < 0 || raw[ptr++] != '\n')
{
throw new CorruptObjectException("invalid committer");
}
}
internal virtual int ParseGitHeaders(int ptr, int end)
{
while (ptr < end)
{
int eol = RawParseUtils.NextLF(buf, ptr);
if (IsHunkHdr(buf, ptr, eol) >= 1)
{
// First hunk header; break out and parse them later.
break;
}
else
{
if (RawParseUtils.Match(buf, ptr, OLD_NAME) >= 0)
{
ParseOldName(ptr, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, NEW_NAME) >= 0)
{
ParseNewName(ptr, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, OLD_MODE) >= 0)
{
oldMode = ParseFileMode(ptr + OLD_MODE.Length, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, NEW_MODE) >= 0)
{
newMode = ParseFileMode(ptr + NEW_MODE.Length, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, DELETED_FILE_MODE) >= 0)
{
oldMode = ParseFileMode(ptr + DELETED_FILE_MODE.Length, eol);
newMode = FileMode.MISSING;
changeType = DiffEntry.ChangeType.DELETE;
}
else
{
if (RawParseUtils.Match(buf, ptr, NEW_FILE_MODE) >= 0)
{
ParseNewFileMode(ptr, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, COPY_FROM) >= 0)
{
oldPath = ParseName(oldPath, ptr + COPY_FROM.Length, eol);
changeType = DiffEntry.ChangeType.COPY;
}
else
{
if (RawParseUtils.Match(buf, ptr, COPY_TO) >= 0)
{
newPath = ParseName(newPath, ptr + COPY_TO.Length, eol);
changeType = DiffEntry.ChangeType.COPY;
}
else
{
if (RawParseUtils.Match(buf, ptr, RENAME_OLD) >= 0)
{
oldPath = ParseName(oldPath, ptr + RENAME_OLD.Length, eol);
changeType = DiffEntry.ChangeType.RENAME;
}
else
{
if (RawParseUtils.Match(buf, ptr, RENAME_NEW) >= 0)
{
newPath = ParseName(newPath, ptr + RENAME_NEW.Length, eol);
changeType = DiffEntry.ChangeType.RENAME;
}
else
{
if (RawParseUtils.Match(buf, ptr, RENAME_FROM) >= 0)
{
oldPath = ParseName(oldPath, ptr + RENAME_FROM.Length, eol);
changeType = DiffEntry.ChangeType.RENAME;
}
else
{
if (RawParseUtils.Match(buf, ptr, RENAME_TO) >= 0)
{
newPath = ParseName(newPath, ptr + RENAME_TO.Length, eol);
changeType = DiffEntry.ChangeType.RENAME;
}
else
{
if (RawParseUtils.Match(buf, ptr, SIMILARITY_INDEX) >= 0)
{
score = RawParseUtils.ParseBase10(buf, ptr + SIMILARITY_INDEX.Length, null);
}
else
{
if (RawParseUtils.Match(buf, ptr, DISSIMILARITY_INDEX) >= 0)
{
score = RawParseUtils.ParseBase10(buf, ptr + DISSIMILARITY_INDEX.Length, null);
}
else
{
if (RawParseUtils.Match(buf, ptr, INDEX) >= 0)
{
ParseIndexLine(ptr + INDEX.Length, eol);
}
else
{
// Probably an empty patch (stat dirty).
break;
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
ptr = eol;
}
return(ptr);
}
internal virtual int ParseBody(NGit.Patch.Patch script, int end)
{
byte[] buf = file.buf;
int c = RawParseUtils.NextLF(buf, startOffset);
int last = c;
old.nDeleted = 0;
old.nAdded = 0;
for (; c < end; last = c, c = RawParseUtils.NextLF(buf, c))
{
switch (buf[c])
{
case (byte)(' '):
case (byte)('\n'):
{
nContext++;
continue;
goto case (byte)('-');
}
case (byte)('-'):
{
old.nDeleted++;
continue;
goto case (byte)('+');
}
case (byte)('+'):
{
old.nAdded++;
continue;
goto case (byte)('\\');
}
case (byte)('\\'):
{
// Matches "\ No newline at end of file"
continue;
goto default;
}
default:
{
goto SCAN_break;
break;
}
}
SCAN_continue :;
}
SCAN_break :;
if (last < end && nContext + old.nDeleted - 1 == old.lineCount && nContext + old.
nAdded == newLineCount && RawParseUtils.Match(buf, last, NGit.Patch.Patch.SIG_FOOTER
) >= 0)
{
// This is an extremely common occurrence of "corruption".
// Users add footers with their signatures after this mark,
// and git diff adds the git executable version number.
// Let it slide; the hunk otherwise looked sound.
//
old.nDeleted--;
return(last);
}
if (nContext + old.nDeleted < old.lineCount)
{
int missingCount = old.lineCount - (nContext + old.nDeleted);
script.Error(buf, startOffset, MessageFormat.Format(JGitText.Get().truncatedHunkOldLinesMissing
, missingCount));
}
else
{
if (nContext + old.nAdded < newLineCount)
{
int missingCount = newLineCount - (nContext + old.nAdded);
script.Error(buf, startOffset, MessageFormat.Format(JGitText.Get().truncatedHunkNewLinesMissing
, missingCount));
}
else
{
if (nContext + old.nDeleted > old.lineCount || nContext + old.nAdded > newLineCount)
{
string oldcnt = old.lineCount + ":" + newLineCount;
string newcnt = (nContext + old.nDeleted) + ":" + (nContext + old.nAdded);
script.Warn(buf, startOffset, MessageFormat.Format(JGitText.Get().hunkHeaderDoesNotMatchBodyLineCountOf
, oldcnt, newcnt));
}
}
}
return(c);
}
private int ParseHunks(FileHeader fh, int c, int end)
{
byte[] buf = fh.buf;
while (c < end)
{
// If we see a file header at this point, we have all of the
// hunks for our current file. We should stop and report back
// with this position so it can be parsed again later.
//
if (RawParseUtils.Match(buf, c, DIFF_GIT) >= 0)
{
break;
}
if (RawParseUtils.Match(buf, c, DIFF_CC) >= 0)
{
break;
}
if (RawParseUtils.Match(buf, c, DIFF_COMBINED) >= 0)
{
break;
}
if (RawParseUtils.Match(buf, c, FileHeader.OLD_NAME) >= 0)
{
break;
}
if (RawParseUtils.Match(buf, c, FileHeader.NEW_NAME) >= 0)
{
break;
}
if (FileHeader.IsHunkHdr(buf, c, end) == fh.GetParentCount())
{
HunkHeader h = fh.NewHunkHeader(c);
h.ParseHeader();
c = h.ParseBody(this, end);
h.endOffset = c;
fh.AddHunk(h);
if (c < end)
{
switch (buf[c])
{
case (byte)('@'):
case (byte)('d'):
case (byte)('\n'):
{
break;
}
default:
{
if (RawParseUtils.Match(buf, c, SIG_FOOTER) < 0 && RawParseUtils.Match(buf, c, SIG_FOOTER_WINDOWS) < 0)
{
Warn(buf, c, JGitText.Get().unexpectedHunkTrailer);
}
break;
}
}
}
continue;
}
int eol = RawParseUtils.NextLF(buf, c);
if (fh.GetHunks().IsEmpty() && (RawParseUtils.Match(buf, c, GIT_BINARY) >= 0 || RawParseUtils.Match(buf, c, GIT_BINARY_WINDOWS) >= 0))
{
fh.patchType = FileHeader.PatchType.GIT_BINARY;
return(ParseGitBinary(fh, eol, end));
}
if (fh.GetHunks().IsEmpty() &&
((BIN_TRAILER.Length < eol - c && RawParseUtils.Match(buf, eol - BIN_TRAILER.Length, BIN_TRAILER) >= 0) ||
(BIN_TRAILER_WINDOWS.Length < eol - c && RawParseUtils.Match(buf, eol - BIN_TRAILER_WINDOWS.Length, BIN_TRAILER_WINDOWS) >= 0)) &&
MatchAny(buf, c, BIN_HEADERS
))
{
// The patch is a binary file diff, with no deltas.
//
fh.patchType = FileHeader.PatchType.BINARY;
return(eol);
}
// Skip this line and move to the next. Its probably garbage
// after the last hunk of a file.
//
c = eol;
}
if (fh.GetHunks().IsEmpty() && fh.GetPatchType() == FileHeader.PatchType.UNIFIED &&
!fh.HasMetaDataChanges())
{
// Hmm, an empty patch? If there is no metadata here we
// really have a binary patch that we didn't notice above.
//
fh.patchType = FileHeader.PatchType.BINARY;
}
return(c);
}
private int ParseFile(byte[] buf, int c, int end)
{
while (c < end)
{
if (FileHeader.IsHunkHdr(buf, c, end) >= 1)
{
// If we find a disconnected hunk header we might
// have missed a file header previously. The hunk
// isn't valid without knowing where it comes from.
//
Error(buf, c, JGitText.Get().hunkDisconnectedFromFile);
c = RawParseUtils.NextLF(buf, c);
continue;
}
// Valid git style patch?
//
if (RawParseUtils.Match(buf, c, DIFF_GIT) >= 0)
{
return(ParseDiffGit(buf, c, end));
}
if (RawParseUtils.Match(buf, c, DIFF_CC) >= 0)
{
return(ParseDiffCombined(DIFF_CC, buf, c, end));
}
if (RawParseUtils.Match(buf, c, DIFF_COMBINED) >= 0)
{
return(ParseDiffCombined(DIFF_COMBINED, buf, c, end));
}
// Junk between files? Leading junk? Traditional
// (non-git generated) patch?
//
int n = RawParseUtils.NextLF(buf, c);
if (n >= end)
{
// Patches cannot be only one line long. This must be
// trailing junk that we should ignore.
//
return(end);
}
if (n - c < 6)
{
// A valid header must be at least 6 bytes on the
// first line, e.g. "--- a/b\n".
//
c = n;
continue;
}
if (RawParseUtils.Match(buf, c, FileHeader.OLD_NAME) >= 0 && RawParseUtils.Match(
buf, n, FileHeader.NEW_NAME) >= 0)
{
// Probably a traditional patch. Ensure we have at least
// a "@@ -0,0" smelling line next. We only check the "@@ -".
//
int f = RawParseUtils.NextLF(buf, n);
if (f >= end)
{
return(end);
}
if (FileHeader.IsHunkHdr(buf, f, end) == 1)
{
return(ParseTraditionalPatch(buf, c, end));
}
}
c = n;
}
return(c);
}
internal override int ParseGitHeaders(int ptr, int end)
{
while (ptr < end)
{
int eol = RawParseUtils.NextLF(buf, ptr);
if (IsHunkHdr(buf, ptr, end) >= 1)
{
// First hunk header; break out and parse them later.
break;
}
else
{
if (RawParseUtils.Match(buf, ptr, OLD_NAME) >= 0)
{
ParseOldName(ptr, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, NEW_NAME) >= 0)
{
ParseNewName(ptr, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, INDEX) >= 0)
{
ParseIndexLine(ptr + INDEX.Length, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, MODE) >= 0)
{
ParseModeLine(ptr + MODE.Length, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, NEW_FILE_MODE) >= 0)
{
ParseNewFileMode(ptr, eol);
}
else
{
if (RawParseUtils.Match(buf, ptr, DELETED_FILE_MODE) >= 0)
{
ParseDeletedFileMode(ptr + DELETED_FILE_MODE.Length, eol);
}
else
{
// Probably an empty patch (stat dirty).
break;
}
}
}
}
}
}
}
ptr = eol;
}
return(ptr);
}
