/**
* Parse a base 10 numeric from a sequence of ASCII digits into an int.
* <para />
* Digit sequences can begin with an optional run of spaces before the
* sequence, and may start with a '+' or a '-' to indicate sign position.
* Any other characters will cause the method to stop and return the current
* result to the caller.
*
* @param b
* buffer to scan.
* @param ptr
* position within buffer to start parsing digits at.
* @param ptrResult
* optional location to return the new ptr value through. If null
* the ptr value will be discarded.
* @return the value at this location; 0 if the location is not a valid
* numeric.
*/
public static int parseBase10(byte[] b, int ptr, MutableInteger ptrResult)
{
int r = 0;
int sign = 0;
try
{
int sz = b.Length;
while (ptr < sz && b[ptr] == ' ')
{
ptr++;
}
if (ptr >= sz)
{
return(0);
}
switch (b[ptr])
{
case ((byte)'-'):
sign = -1;
ptr++;
break;
case ((byte)'+'):
ptr++;
break;
}
while (ptr < sz)
{
byte d = b[ptr];
if ((d < (byte)'0') || (d > (byte)'9'))
{
break;
}
r = r * 10 + (d - (byte)'0');
ptr++;
}
}
catch (IndexOutOfRangeException)
{
// Not a valid digit.
}
if (ptrResult != null)
{
ptrResult.value = ptr;
}
return(sign < 0 ? -r : r);
}
/// <summary>
/// Parse a base 10 numeric from a sequence of ASCII digits into a long.
/// <para />
/// Digit sequences can begin with an optional run of spaces before the
/// sequence, and may start with a '+' or a '-' to indicate sign position.
/// Any other characters will cause the method to stop and return the current
/// result to the caller.
/// </summary>
/// <param name="b">Buffer to scan.</param>
/// <param name="ptr">
/// Position within buffer to start parsing digits at.
/// </param>
/// <param name="ptrResult">
/// Optional location to return the new ptr value through. If null
/// the ptr value will be discarded.
/// </param>
/// <returns>
/// The value at this location; 0 if the location is not a valid
/// numeric.
/// </returns>
public static long parseLongBase10(byte[] b, int ptr, MutableInteger ptrResult)
{
long r = 0;
int sign = 0;
try
{
int sz = b.Length;
while (ptr < sz && b[ptr] == ' ')
{
ptr++;
}
if (ptr >= sz)
{
return(0);
}
switch (b[ptr])
{
case (byte)'-':
sign = -1;
ptr++;
break;
case (byte)'+':
ptr++;
break;
}
while (ptr < sz)
{
int v = b[ptr] - (byte)'0';
if (v < 0)
{
break;
}
r = (r * 10) + v;
ptr++;
}
}
catch (IndexOutOfRangeException)
{
// Not a valid digit.
}
if (ptrResult != null)
{
ptrResult.value = ptr;
}
return(sign < 0 ? -r : r);
}
/**
* Parse a name line (e.g. author, committer, tagger) into a PersonIdent.
* <para />
* When passing in a value for <code>nameB</code> callers should use the
* return value of {@link #author(byte[], int)} or
* {@link #committer(byte[], int)}, as these methods provide the proper
* position within the buffer.
*
* @param raw
* the buffer to parse character data from.
* @param nameB
* first position of the identity information. This should be the
* first position After the space which delimits the header field
* name (e.g. "author" or "committer") from the rest of the
* identity line.
* @return the parsed identity. Never null.
*/
public static PersonIdent parsePersonIdent(byte[] raw, int nameB)
{
Encoding cs = parseEncoding(raw);
int emailB = nextLF(raw, nameB, (byte)'<');
int emailE = nextLF(raw, emailB, (byte)'>');
string name = decode(cs, raw, nameB, emailB - 2);
string email = decode(cs, raw, emailB, emailE - 1);
var ptrout = new MutableInteger();
long when = parseLongBase10(raw, emailE + 1, ptrout);
int tz = parseTimeZoneOffset(raw, ptrout.value);
return(new PersonIdent(name, email, when * 1000, tz));
}
public void parseCanonical(RevWalk walk, byte[] rawTag)
{
var pos = new MutableInteger { value = 53 };
int oType = Constants.decodeTypeString(this, rawTag, (byte)'\n', pos);
walk.IdBuffer.FromString(rawTag, 7);
_object = walk.lookupAny(walk.IdBuffer, oType);
int p = pos.value += 4; // "tag "
int nameEnd = RawParseUtils.nextLF(rawTag, p) - 1;
_tagName = RawParseUtils.decode(Constants.CHARSET, rawTag, p, nameEnd);
if (walk.isRetainBody())
_buffer = rawTag;
Flags |= PARSED;
}
/**
* Parse a name data (e.g. as within a reflog) into a PersonIdent.
* <para />
* When passing in a value for <code>nameB</code> callers should use the
* return value of {@link #author(byte[], int)} or
* {@link #committer(byte[], int)}, as these methods provide the proper
* position within the buffer.
*
* @param raw
* the buffer to parse character data from.
* @param nameB
* first position of the identity information. This should be the
* first position After the space which delimits the header field
* name (e.g. "author" or "committer") from the rest of the
* identity line.
* @return the parsed identity. Never null.
*/
public static PersonIdent parsePersonIdentOnly(byte[] raw, int nameB)
{
int stop = nextLF(raw, nameB);
int emailB = nextLF(raw, nameB, (byte)'<');
int emailE = nextLF(raw, emailB, (byte)'>');
string name;
string email;
if (emailE < stop)
{
email = decode(raw, emailB, emailE - 1);
}
else
{
email = "invalid";
}
if (emailB < stop)
{
name = decode(raw, nameB, emailB - 2);
}
else
{
name = decode(raw, nameB, stop);
}
MutableInteger ptrout = new MutableInteger();
long when;
int tz;
if (emailE < stop)
{
when = parseLongBase10(raw, emailE + 1, ptrout);
tz = parseTimeZoneOffset(raw, ptrout.value);
}
else
{
when = 0;
tz = 0;
}
return(new PersonIdent(name, email, when * 1000, tz));
}
/// <summary>
/// Parse an encoded type string into a type constant.
/// </summary>
/// <param name="id">
/// <see cref="ObjectId" /> this type string came from; may be null if
/// that is not known at the time the parse is occurring.
/// </param>
/// <param name="typeString">string version of the type code.</param>
/// <param name="endMark">
/// Character immediately following the type string. Usually ' '
/// (space) or '\n' (line feed).
/// </param>
/// <param name="offset">
/// Position within <paramref name="typeString"/> where the parse
/// should start. Updated with the new position (just past
/// <paramref name="endMark"/> when the parse is successful).
/// </param>
/// <returns>
/// A type code constant (one of <see cref="OBJ_BLOB"/>,
/// <see cref="OBJ_COMMIT"/>, <see cref="OBJ_TAG"/>, <see cref="OBJ_TREE"/>
/// </returns>
/// <exception cref="CorruptObjectException"></exception>
public static int decodeTypeString(AnyObjectId id, byte[] typeString, byte endMark, MutableInteger offset)
{
try
{
int position = offset.value;
switch (typeString[position])
{
case (byte)'b':
if (typeString[position + 1] != (byte)'l'
|| typeString[position + 2] != (byte)'o'
|| typeString[position + 3] != (byte)'b'
|| typeString[position + 4] != endMark)
{
throw new CorruptObjectException(id, "invalid type");
}
offset.value = position + 5;
return OBJ_BLOB;
case (byte)'c':
if (typeString[position + 1] != (byte)'o'
|| typeString[position + 2] != (byte)'m'
|| typeString[position + 3] != (byte)'m'
|| typeString[position + 4] != (byte)'i'
|| typeString[position + 5] != (byte)'t'
|| typeString[position + 6] != endMark)
{
throw new CorruptObjectException(id, "invalid type");
}
offset.value = position + 7;
return OBJ_COMMIT;
case (byte)'t':
switch (typeString[position + 1])
{
case (byte)'a':
if (typeString[position + 2] != (byte)'g'
|| typeString[position + 3] != endMark)
throw new CorruptObjectException(id, "invalid type");
offset.value = position + 4;
return OBJ_TAG;
case (byte)'r':
if (typeString[position + 2] != (byte)'e'
|| typeString[position + 3] != (byte)'e'
|| typeString[position + 4] != endMark)
throw new CorruptObjectException(id, "invalid type");
offset.value = position + 5;
return OBJ_TREE;
default:
throw new CorruptObjectException(id, "invalid type");
}
default:
throw new CorruptObjectException(id, "invalid type");
}
}
catch (IndexOutOfRangeException)
{
throw new CorruptObjectException(id, "invalid type");
}
}
private UnpackedObjectLoader(byte[] compressed, AnyObjectId id)
{
// Try to determine if this is a legacy format loose object or
// a new style loose object. The legacy format was completely
// compressed with zlib so the first byte must be 0x78 (15-bit
// window size, deflated) and the first 16 bit word must be
// evenly divisible by 31. Otherwise its a new style loose
// object.
//
Inflater inflater = InflaterCache.Instance.get();
try
{
int fb = compressed[0] & 0xff;
if (fb == 0x78 && (((fb << 8) | compressed[1] & 0xff) % 31) == 0)
{
inflater.SetInput(compressed);
var hdr = new byte[64];
int avail = 0;
while (!inflater.IsFinished && avail < hdr.Length)
{
try
{
avail += inflater.Inflate(hdr, avail, hdr.Length - avail);
}
catch (IOException dfe)
{
var coe = new CorruptObjectException(id, "bad stream", dfe);
//inflater.end();
throw coe;
}
}
if (avail < 5)
{
throw new CorruptObjectException(id, "no header");
}
var p = new MutableInteger();
_objectType = Constants.decodeTypeString(id, hdr, (byte)' ', p);
_objectSize = RawParseUtils.parseBase10(hdr, p.value, p);
if (_objectSize < 0)
{
throw new CorruptObjectException(id, "negative size");
}
if (hdr[p.value++] != 0)
{
throw new CorruptObjectException(id, "garbage after size");
}
_bytes = new byte[_objectSize];
if (p.value < avail)
{
Array.Copy(hdr, p.value, _bytes, 0, avail - p.value);
}
Decompress(id, inflater, avail - p.value);
}
else
{
int p = 0;
int c = compressed[p++] & 0xff;
int typeCode = (c >> 4) & 7;
int size = c & 15;
int shift = 4;
while ((c & 0x80) != 0)
{
c = compressed[p++] & 0xff;
size += (c & 0x7f) << shift;
shift += 7;
}
switch (typeCode)
{
case Constants.OBJ_COMMIT:
case Constants.OBJ_TREE:
case Constants.OBJ_BLOB:
case Constants.OBJ_TAG:
_objectType = typeCode;
break;
default:
throw new CorruptObjectException(id, "invalid type");
}
_objectSize = size;
_bytes = new byte[_objectSize];
inflater.SetInput(compressed, p, compressed.Length - p);
Decompress(id, inflater, 0);
}
}
finally
{
InflaterCache.Instance.release(inflater);
}
}
/**
* Parse a name data (e.g. as within a reflog) into a PersonIdent.
* <para />
* When passing in a value for <code>nameB</code> callers should use the
* return value of {@link #author(byte[], int)} or
* {@link #committer(byte[], int)}, as these methods provide the proper
* position within the buffer.
*
* @param raw
* the buffer to parse character data from.
* @param nameB
* first position of the identity information. This should be the
* first position After the space which delimits the header field
* name (e.g. "author" or "committer") from the rest of the
* identity line.
* @return the parsed identity. Never null.
*/
public static PersonIdent parsePersonIdentOnly(byte[] raw, int nameB)
{
int stop = nextLF(raw, nameB);
int emailB = nextLF(raw, nameB, (byte)'<');
int emailE = nextLF(raw, emailB, (byte)'>');
string name;
string email;
if (emailE < stop)
{
email = decode(raw, emailB, emailE - 1);
}
else
{
email = "invalid";
}
if (emailB < stop)
name = decode(raw, nameB, emailB - 2);
else
name = decode(raw, nameB, stop);
MutableInteger ptrout = new MutableInteger();
long when;
int tz;
if (emailE < stop)
{
when = parseLongBase10(raw, emailE + 1, ptrout);
tz = parseTimeZoneOffset(raw, ptrout.value);
}
else
{
when = 0;
tz = 0;
}
return new PersonIdent(name, email, when * 1000, tz);
}
/**
* Parse a name line (e.g. author, committer, tagger) into a PersonIdent.
* <para />
* When passing in a value for <code>nameB</code> callers should use the
* return value of {@link #author(byte[], int)} or
* {@link #committer(byte[], int)}, as these methods provide the proper
* position within the buffer.
*
* @param raw
* the buffer to parse character data from.
* @param nameB
* first position of the identity information. This should be the
* first position After the space which delimits the header field
* name (e.g. "author" or "committer") from the rest of the
* identity line.
* @return the parsed identity. Never null.
*/
public static PersonIdent parsePersonIdent(byte[] raw, int nameB)
{
Encoding cs = parseEncoding(raw);
int emailB = nextLF(raw, nameB, (byte)'<');
int emailE = nextLF(raw, emailB, (byte)'>');
string name = decode(cs, raw, nameB, emailB - 2);
string email = decode(cs, raw, emailB, emailE - 1);
var ptrout = new MutableInteger();
long when = parseLongBase10(raw, emailE + 1, ptrout);
int tz = parseTimeZoneOffset(raw, ptrout.value);
return new PersonIdent(name, email, when * 1000, tz);
}
/// <summary>
/// Parse a base 10 numeric from a sequence of ASCII digits into a long.
/// <para />
/// Digit sequences can begin with an optional run of spaces before the
/// sequence, and may start with a '+' or a '-' to indicate sign position.
/// Any other characters will cause the method to stop and return the current
/// result to the caller.
/// </summary>
/// <param name="b">Buffer to scan.</param>
/// <param name="ptr">
/// Position within buffer to start parsing digits at.
/// </param>
/// <param name="ptrResult">
/// Optional location to return the new ptr value through. If null
/// the ptr value will be discarded.
/// </param>
/// <returns>
/// The value at this location; 0 if the location is not a valid
/// numeric.
/// </returns>
public static long parseLongBase10(byte[] b, int ptr, MutableInteger ptrResult)
{
long r = 0;
int sign = 0;
try
{
int sz = b.Length;
while (ptr < sz && b[ptr] == ' ')
ptr++;
if (ptr >= sz)
return 0;
switch (b[ptr])
{
case (byte)'-':
sign = -1;
ptr++;
break;
case (byte)'+':
ptr++;
break;
}
while (ptr < sz)
{
int v = b[ptr] - (byte)'0';
if (v < 0)
break;
r = (r * 10) + v;
ptr++;
}
}
catch (IndexOutOfRangeException)
{
// Not a valid digit.
}
if (ptrResult != null)
ptrResult.value = ptr;
return sign < 0 ? -r : r;
}
/**
* Parse a base 10 numeric from a sequence of ASCII digits into an int.
* <para />
* Digit sequences can begin with an optional run of spaces before the
* sequence, and may start with a '+' or a '-' to indicate sign position.
* Any other characters will cause the method to stop and return the current
* result to the caller.
*
* @param b
* buffer to scan.
* @param ptr
* position within buffer to start parsing digits at.
* @param ptrResult
* optional location to return the new ptr value through. If null
* the ptr value will be discarded.
* @return the value at this location; 0 if the location is not a valid
* numeric.
*/
public static int parseBase10(byte[] b, int ptr, MutableInteger ptrResult)
{
int r = 0;
int sign = 0;
try
{
int sz = b.Length;
while (ptr < sz && b[ptr] == ' ')
ptr++;
if (ptr >= sz)
return 0;
switch (b[ptr])
{
case ((byte)'-'):
sign = -1;
ptr++;
break;
case ((byte)'+'):
ptr++;
break;
}
while (ptr < sz)
{
byte d = b[ptr];
if ((d < (byte)'0') || (d > (byte)'9'))
break;
r = r * 10 + (d - (byte)'0');
ptr++;
}
}
catch (IndexOutOfRangeException)
{
// Not a valid digit.
}
if (ptrResult != null)
ptrResult.value = ptr;
return sign < 0 ? -r : r;
}
public DirCacheTree(byte[] @in, MutableInteger off, DirCacheTree myParent)
{
_parent = myParent;
int ptr = RawParseUtils.next(@in, off.value, (byte)'\0');
int nameLen = ptr - off.value - 1;
if (nameLen > 0)
{
_encodedName = new byte[nameLen];
Array.Copy(@in, off.value, _encodedName, 0, nameLen);
}
else
{
_encodedName = NoName;
}
_entrySpan = RawParseUtils.parseBase10(@in, ptr, off);
int subcnt = RawParseUtils.parseBase10(@in, off.value, off);
off.value = RawParseUtils.next(@in, off.value, (byte)'\n');
if (_entrySpan >= 0)
{
// Valid trees have a positive entry count and an id of a
// tree object that should exist in the object database.
//
_id = ObjectId.FromRaw(@in, off.value);
off.value += Constants.OBJECT_ID_LENGTH;
}
if (subcnt > 0)
{
bool alreadySorted = true;
_children = new DirCacheTree[subcnt];
for (int i = 0; i < subcnt; i++)
{
_children[i] = new DirCacheTree(@in, off, this);
// C Git's ordering differs from our own; it prefers to
// sort by Length first. This sometimes produces a sort
// we do not desire. On the other hand it may have been
// created by us, and be sorted the way we want.
//
if (alreadySorted && i > 0
&& TreeComparison(_children[i - 1], _children[i]) > 0)
{
alreadySorted = false;
}
}
if (!alreadySorted)
{
Array.Sort(_children, TreeComparison);
}
}
else
{
// Leaf level trees have no children, only (file) entries.
//
_children = NoChildren;
}
_childCount = subcnt;
}
public virtual void parseHeader()
{
// Parse "@@ -236,9 +236,9 @@ protected boolean"
//
byte[] buf = _file.Buffer;
var ptr = new MutableInteger
{
value = RawParseUtils.nextLF(buf, _startOffset, (byte)' ')
};
_oldImage.StartLine = -1 * RawParseUtils.parseBase10(buf, ptr.value, ptr);
_oldImage.LineCount = buf[ptr.value] == ',' ? RawParseUtils.parseBase10(buf, ptr.value + 1, ptr) : 1;
NewStartLine = RawParseUtils.parseBase10(buf, ptr.value + 1, ptr);
NewLineCount = buf[ptr.value] == ',' ? RawParseUtils.parseBase10(buf, ptr.value + 1, ptr) : 1;
}
public override void parseHeader()
{
// Parse "@@@ -55,12 -163,13 +163,15 @@@ protected boolean"
//
byte[] buf = File.Buffer;
var ptr = new MutableInteger
{
value = RawParseUtils.nextLF(buf, StartOffset, (byte)' ')
};
_old.ForEach(coi =>
{
coi.StartLine = -1 * RawParseUtils.parseBase10(Buffer, ptr.value, ptr);
coi.LineCount = buf[ptr.value] == ',' ?
RawParseUtils.parseBase10(buf, ptr.value + 1, ptr) : 1;
});
NewStartLine = RawParseUtils.parseBase10(buf, ptr.value + 1, ptr);
NewLineCount = buf[ptr.value] == ',' ? RawParseUtils.parseBase10(buf, ptr.value + 1, ptr) : 1;
}
