/**
* <summary>Retrieves the PDF version of the file [PDF:1.6:3.4.1].</summary>
*/
public string RetrieveVersion(
)
{
stream.Seek(0);
string header = stream.ReadString(10);
if (!header.StartsWith(Keyword.BOF))
{
throw new FileFormatException("PDF header not found.", stream.Position);
}
return(header.Substring(Keyword.BOF.Length, 3));
}
/**
* <summary>Retrieves the starting position of the last xref-table section [PDF:1.6:3.4.4].</summary>
*/
public long RetrieveXRefOffset(
)
{
IInputStream stream = Stream;
long streamLength = stream.Length;
int chunkSize = (int)Math.Min(streamLength, EOFMarkerChunkSize);
// Move back before 'startxref' keyword!
long position = streamLength - chunkSize;
stream.Seek(position);
// Get 'startxref' keyword position!
int index = stream.ReadString(chunkSize).LastIndexOf(Keyword.StartXRef);
if (index < 0)
{
throw new ParseException("'" + Keyword.StartXRef + "' keyword not found.", stream.Position);
}
// Go past the startxref keyword!
stream.Seek(position + index); MoveNext();
// Go to the xref offset!
MoveNext();
if (TokenType != TokenTypeEnum.Integer)
{
throw new ParseException("'" + Keyword.StartXRef + "' value invalid.", stream.Position);
}
return((int)Token);
}
/**
* <summary>Retrieves the PDF version of the file [PDF:1.6:3.4.1].</summary>
*/
public string RetrieveVersion()
{
IInputStream stream = Stream;
stream.Seek(0);
string header = stream.ReadString(10);
if (!header.StartsWith(Keyword.BOF))
{
throw new PostScriptParseException("PDF header not found.", this);
}
return(header.Substring(Keyword.BOF.Length, 3));
}
/**
* <summary>Retrieves the starting position of the last xref-table section [PDF:1.6:3.4.4].</summary>
*/
public long RetrieveXRefOffset(
)
{
// [FIX:69] 'startxref' keyword not found (file was corrupted by alien data in the tail).
IInputStream stream = Stream;
long streamLength = stream.Length;
long position = streamLength;
int chunkSize = (int)Math.Min(streamLength, EOFMarkerChunkSize);
int index = -1;
while (index < 0 && position > 0)
{
/*
* NOTE: This condition prevents the keyword from being split by the chunk boundary.
*/
if (position < streamLength)
{
position += Keyword.StartXRef.Length;
}
position -= chunkSize;
if (position < 0)
{
position = 0;
}
stream.Seek(position);
// Get 'startxref' keyword position!
index = stream.ReadString(chunkSize).LastIndexOf(Keyword.StartXRef);
}
if (index < 0)
{
throw new PostScriptParseException("'" + Keyword.StartXRef + "' keyword not found.", this);
}
// Go past the 'startxref' keyword!
stream.Seek(position + index); MoveNext();
// Get the xref offset!
MoveNext();
if (TokenType != TokenTypeEnum.Integer)
{
throw new PostScriptParseException("'" + Keyword.StartXRef + "' value invalid.", this);
}
return((int)Token);
}
void IMessage.ReadFrom(IInputStream input)
{
uint tag;
while ((tag = input.ReadTag()) != 0)
{
switch (tag)
{
case 9:
_fdouble = input.ReadDouble();
break;
case 21:
_ffloat = input.ReadFloat();
break;
case 24:
_fint32 = input.ReadInt32();
break;
case 32:
_fint64 = input.ReadInt64();
break;
case 40:
_fuint32 = input.ReadUInt32();
break;
case 48:
_fuint64 = input.ReadUInt64();
break;
case 56:
_fsint32 = input.ReadSInt32();
break;
case 64:
_fsint64 = input.ReadSInt64();
break;
case 77:
_ffixed32 = input.ReadFixed32();
break;
case 81:
_ffixed64 = input.ReadFixed64();
break;
case 93:
_fsfixed32 = input.ReadSFixed32();
break;
case 97:
_fsfixed64 = input.ReadSFixed64();
break;
case 104:
_fbool = input.ReadBool();
break;
case 114:
_fstring = input.ReadString();
break;
case 122:
_fbytes = input.ReadBytes();
break;
case 128:
_fenum = (SomeEnum)input.ReadEnum();
break;
case 138:
if (_finner == null)
{
_finner = new InnerMessage();
}
input.ReadMessage(_finner);
break;
case 146:
if (_frep == null)
{
_frep = new global::System.Collections.Generic.List <InnerMessage>();
}
input.ReadRepeated(_frep.Add, _tinyRepeatedTypeTestroot_Classes_InnerMessage, x => _frep.Capacity = _frep.Count + x);
break;
case 152:
if (_frepEnum == null)
{
_frepEnum = new global::System.Collections.Generic.List <SomeEnum>();
}
input.ReadRepeated(_frepEnum.Add, _tinyRepeatedTypeTestroot_Classes_TestEnum, x => _frepEnum.Capacity = _frepEnum.Count + x);
break;
case 162:
if (_frepString == null)
{
_frepString = new global::System.Collections.Generic.List <string>();
}
input.ReadRepeated(_frepString.Add, RepeatedTypes.String, x => _frepString.Capacity = _frepString.Count + x);
break;
case 173:
if (_frepFixed32 == null)
{
_frepFixed32 = new global::System.Collections.Generic.List <uint>();
}
input.ReadRepeated(_frepFixed32.Add, RepeatedTypes.Fixed32, x => _frepFixed32.Capacity = _frepFixed32.Count + x);
break;
case 176:
if (_frepUint32 == null)
{
_frepUint32 = new global::System.Collections.Generic.List <uint>();
}
input.ReadRepeated(_frepUint32.Add, RepeatedTypes.UInt32, x => _frepUint32.Capacity = _frepUint32.Count + x);
break;
default:
input.SkipField();
break;
}
}
}
