| public static isHunkHdr ( byte buf, int start, int end ) : int | ||
| buf | byte | the buffer to scan |
| start | int | first position in the buffer to evaluate |
| end | int |
/// last position to consider; usually the end of the buffer
/// (buf.length) or the first position on the next
/// line. This is only used to avoid very long runs of '@' from
/// killing the scan loop.
/// |
| return | int | |
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);
}
