/// <summary>
/// Check an annotated tag for errors.
/// </summary>
/// <param name="raw">The tag data. The array is never modified.</param>
/// <exception cref="CorruptObjectException">If any error was detected.</exception>
public 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");
}
}
}
public int parseTraditionalHeaders(int ptr, int end)
{
while (ptr < end)
{
int eol = RawParseUtils.nextLF(Buffer, ptr);
if (isHunkHdr(Buffer, ptr, eol) >= 1)
{
// First hunk header; break out and parse them later.
break;
}
if (RawParseUtils.match(Buffer, ptr, OLD_NAME) >= 0)
{
ParseOldName(ptr, eol);
}
else if (RawParseUtils.match(Buffer, ptr, NEW_NAME) >= 0)
{
ParseNewName(ptr, eol);
}
else
{
// Possibly an empty patch.
break;
}
ptr = eol;
}
return(ptr);
}
public void testMatch_Prefix()
{
byte[] src = Constants.encodeASCII("author ");
byte[] dst = Constants.encodeASCII("author A. U. Thor");
Assert.IsTrue(RawParseUtils.match(dst, 0, src) == src.Length);
Assert.IsTrue(RawParseUtils.match(dst, 1, src) < 0);
}
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, IEnumerable <byte[]> srcs)
{
foreach (byte[] s in srcs)
{
if (RawParseUtils.match(buf, c, s) >= 0)
{
return(true);
}
}
return(false);
}
public override int parseGitHeaders(int ptr, int end)
{
while (ptr < end)
{
int eol = RawParseUtils.nextLF(Buffer, ptr);
if (isHunkHdr(Buffer, ptr, end) >= 1)
{
// First hunk header; break out and parse them later.
break;
}
if (RawParseUtils.match(Buffer, ptr, OLD_NAME) >= 0)
{
ParseOldName(ptr, eol);
}
else if (RawParseUtils.match(Buffer, ptr, NEW_NAME) >= 0)
{
ParseNewName(ptr, eol);
}
else if (RawParseUtils.match(Buffer, ptr, Index) >= 0)
{
ParseIndexLine(ptr + Index.Length, eol);
}
else if (RawParseUtils.match(Buffer, ptr, Mode) >= 0)
{
parseModeLine(ptr + Mode.Length, eol);
}
else if (RawParseUtils.match(Buffer, ptr, NewFileMode) >= 0)
{
ParseNewFileMode(ptr, eol);
}
else if (RawParseUtils.match(Buffer, ptr, DeletedFileMode) >= 0)
{
parseDeletedFileMode(ptr + DeletedFileMode.Length, eol);
}
else
{
// Probably an empty patch (stat dirty).
break;
}
ptr = eol;
}
return(ptr);
}
/// <summary>
/// Check a commit for errors.
/// </summary>
/// <param name="raw">The commit data. The array is never modified.</param>
/// <exception cref="CorruptObjectException">If any error was detected.</exception>
public 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");
}
}
public int parseHunk(int ptr, int end)
{
byte[] buf = file.Buffer;
if (RawParseUtils.match(buf, ptr, LITERAL) >= 0)
{
type = Type.LITERAL_DEFLATED;
length = RawParseUtils.parseBase10(buf, ptr + LITERAL.Length, null);
}
else if (RawParseUtils.match(buf, ptr, DELTA) >= 0)
{
type = 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';
ptr = RawParseUtils.nextLF(buf, ptr);
if (empty)
{
break;
}
}
return(ptr);
}
private void OnOpenPack()
{
PackIndex idx = LoadPackIndex();
var buf = new byte[20];
IO.ReadFully(_fd, 0, buf, 0, 12);
if (RawParseUtils.match(buf, 0, Constants.PACK_SIGNATURE) != 4)
{
throw new IOException("Not a PACK file.");
}
long vers = NB.decodeUInt32(buf, 4);
long packCnt = NB.decodeUInt32(buf, 8);
if (vers != 2 && vers != 3)
{
throw new IOException("Unsupported pack version " + vers + ".");
}
if (packCnt != idx.ObjectCount)
{
throw new PackMismatchException("Pack object count mismatch:"
+ " pack " + packCnt
+ " index " + idx.ObjectCount
+ ": " + File.FullName);
}
IO.ReadFully(_fd, Length - 20, buf, 0, 20);
if (!buf.SequenceEqual(_packChecksum))
{
throw new PackMismatchException("Pack checksum mismatch:"
+ " pack " + ObjectId.FromRaw(buf)
+ " index " + ObjectId.FromRaw(idx.PackChecksum)
+ ": " + File.FullName);
}
}
private int ParseHunks(FileHeader fh, int c, int end)
{
byte[] buf = fh.Buffer;
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, DiffGit) >= 0)
{
break;
}
if (RawParseUtils.match(buf, c, DiffCc) >= 0)
{
break;
}
if (RawParseUtils.match(buf, c, DiffCombined) >= 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.ParentCount)
{
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, SigFooter) < 0)
{
warn(buf, c, "Unexpected hunk trailer");
}
break;
}
}
continue;
}
int eol = RawParseUtils.nextLF(buf, c);
if (fh.Hunks.isEmpty() && RawParseUtils.match(buf, c, GitBinary) >= 0)
{
fh.PatchType = FileHeader.PatchTypeEnum.GIT_BINARY;
return(ParseGitBinary(fh, eol, end));
}
if (fh.Hunks.isEmpty() && BinTrailer.Length < eol - c &&
RawParseUtils.match(buf, eol - BinTrailer.Length, BinTrailer) >= 0 &&
MatchAny(buf, c, BinHeaders))
{
// The patch is a binary file diff, with no deltas.
//
fh.PatchType = FileHeader.PatchTypeEnum.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.Hunks.isEmpty() &&
fh.getPatchType() == FileHeader.PatchTypeEnum.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.PatchTypeEnum.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, "Hunk disconnected from file");
c = RawParseUtils.nextLF(buf, c);
continue;
}
// Valid git style patch?
//
if (RawParseUtils.match(buf, c, DiffGit) >= 0)
{
return(ParseDiffGit(buf, c, end));
}
if (RawParseUtils.match(buf, c, DiffCc) >= 0)
{
return(ParseDiffCombined(DiffCc, buf, c, end));
}
if (RawParseUtils.match(buf, c, DiffCombined) >= 0)
{
return(ParseDiffCombined(DiffCombined, 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);
}
public virtual int parseGitHeaders(int ptr, int end)
{
while (ptr < end)
{
int eol = RawParseUtils.nextLF(Buffer, ptr);
if (isHunkHdr(Buffer, ptr, eol) >= 1)
{
// First hunk header; break out and parse them later.
break;
}
if (RawParseUtils.match(Buffer, ptr, OLD_NAME) >= 0)
{
ParseOldName(ptr, eol);
}
else if (RawParseUtils.match(Buffer, ptr, NEW_NAME) >= 0)
{
ParseNewName(ptr, eol);
}
else if (RawParseUtils.match(Buffer, ptr, OldModeString) >= 0)
{
_oldMode = ParseFileMode(ptr + OldModeString.Length, eol);
}
else if (RawParseUtils.match(Buffer, ptr, NewModeString) >= 0)
{
_newMode = ParseFileMode(ptr + NewModeString.Length, eol);
}
else if (RawParseUtils.match(Buffer, ptr, DeletedFileMode) >= 0)
{
_oldMode = ParseFileMode(ptr + DeletedFileMode.Length, eol);
_newMode = FileMode.Missing;
ChangeType = ChangeTypeEnum.DELETE;
}
else if (RawParseUtils.match(Buffer, ptr, NewFileMode) >= 0)
{
ParseNewFileMode(ptr, eol);
}
else if (RawParseUtils.match(Buffer, ptr, CopyFrom) >= 0)
{
oldName = ParseName(oldName, ptr + CopyFrom.Length, eol);
ChangeType = ChangeTypeEnum.COPY;
}
else if (RawParseUtils.match(Buffer, ptr, CopyTo) >= 0)
{
newName = ParseName(newName, ptr + CopyTo.Length, eol);
ChangeType = ChangeTypeEnum.COPY;
}
else if (RawParseUtils.match(Buffer, ptr, RenameOld) >= 0)
{
oldName = ParseName(oldName, ptr + RenameOld.Length, eol);
ChangeType = ChangeTypeEnum.RENAME;
}
else if (RawParseUtils.match(Buffer, ptr, RenameNew) >= 0)
{
newName = ParseName(newName, ptr + RenameNew.Length, eol);
ChangeType = ChangeTypeEnum.RENAME;
}
else if (RawParseUtils.match(Buffer, ptr, RenameFrom) >= 0)
{
oldName = ParseName(oldName, ptr + RenameFrom.Length, eol);
ChangeType = ChangeTypeEnum.RENAME;
}
else if (RawParseUtils.match(Buffer, ptr, RenameTo) >= 0)
{
newName = ParseName(newName, ptr + RenameTo.Length, eol);
ChangeType = ChangeTypeEnum.RENAME;
}
else if (RawParseUtils.match(Buffer, ptr, SimilarityIndex) >= 0)
{
_score = RawParseUtils.parseBase10(Buffer, ptr + SimilarityIndex.Length, null);
}
else if (RawParseUtils.match(Buffer, ptr, DissimilarityIndex) >= 0)
{
_score = RawParseUtils.parseBase10(Buffer, ptr + DissimilarityIndex.Length, null);
}
else if (RawParseUtils.match(Buffer, ptr, Index) >= 0)
{
ParseIndexLine(ptr + Index.Length, eol);
}
else
{
// Probably an empty patch (stat dirty).
break;
}
ptr = eol;
}
return(ptr);
}
public void testMatch_TooSmall()
{
byte[] src = Constants.encodeASCII("author ");
byte[] dst = Constants.encodeASCII("author autho");
Assert.IsTrue(RawParseUtils.match(dst, src.Length + 1, src) < 0);
}
public void testMatch_NotEqual()
{
byte[] src = Constants.encodeASCII(" differ\n");
byte[] dst = Constants.encodeASCII("a differ\n");
Assert.IsTrue(RawParseUtils.match(dst, 2, src) < 0);
}
public void testMatch_Equal()
{
byte[] src = Constants.encodeASCII(" differ\n");
byte[] dst = Constants.encodeASCII("foo differ\n");
Assert.IsTrue(RawParseUtils.match(dst, 3, src) == 3 + src.Length);
}
public virtual int parseBody(Patch script, int end)
{
byte[] buf = _file.Buffer;
int c = RawParseUtils.nextLF(buf, _startOffset), last = c;
_oldImage.LinesDeleted = 0;
_oldImage.LinesAdded = 0;
for (; c < end; last = c, c = RawParseUtils.nextLF(buf, c))
{
bool breakScan;
switch (buf[c])
{
case (byte)' ':
case (byte)'\n':
LinesContext++;
continue;
case (byte)'-':
_oldImage.LinesDeleted++;
continue;
case (byte)'+':
_oldImage.LinesAdded++;
continue;
case (byte)'\\': // Matches "\ No newline at end of file"
continue;
default:
breakScan = true;
break;
}
if (breakScan)
{
break;
}
}
if (last < end && LinesContext + _oldImage.LinesDeleted - 1 == _oldImage.LineCount &&
LinesContext + _oldImage.LinesAdded == NewLineCount &&
RawParseUtils.match(buf, last, Patch.SigFooter) >= 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.
//
_oldImage.LinesDeleted--;
return(last);
}
if (LinesContext + _oldImage.LinesDeleted < _oldImage.LineCount)
{
int missingCount = _oldImage.LineCount - (LinesContext + _oldImage.LinesDeleted);
script.error(buf, _startOffset, "Truncated hunk, at least "
+ missingCount + " old lines is missing");
}
else if (LinesContext + _oldImage.LinesAdded < NewLineCount)
{
int missingCount = NewLineCount - (LinesContext + _oldImage.LinesAdded);
script.error(buf, _startOffset, "Truncated hunk, at least "
+ missingCount + " new lines is missing");
}
else if (LinesContext + _oldImage.LinesDeleted > _oldImage.LineCount ||
LinesContext + _oldImage.LinesAdded > NewLineCount)
{
string oldcnt = _oldImage.LineCount + ":" + NewLineCount;
string newcnt = (LinesContext + _oldImage.LinesDeleted) + ":"
+ (LinesContext + _oldImage.LinesAdded);
script.warn(buf, _startOffset, "Hunk header " + oldcnt
+ " does not match body line count of " + newcnt);
}
return(c);
}
