/**
* <summary>Loads the font data.</summary>
*/
private void Load(
)
{
try
{
ParseHeader();
Index nameIndex = Index.Parse(fontData);
Index topDictIndex = Index.Parse(fontData);
stringIndex = Index.Parse(fontData);
#pragma warning disable 0219
Index globalSubrIndex = Index.Parse(fontData);
string fontName = ToString(nameIndex[0]);
#pragma warning restore 0219
Dict topDict = Dict.Parse(topDictIndex[0]);
// int encodingOffset = topDict.get(Dict.OperatorEnum.Encoding, 0, 0).intValue();
//TODO: encoding
int charsetOffset = (int)topDict.Get(Dict.OperatorEnum.Charset, 0, 0);
StandardCharsetEnum?charset = GetStandardCharset(charsetOffset);
if (charset.HasValue)
{
glyphIndexes = new Dictionary <int, int>(StandardCharsets[charset.Value]);
}
else
{
glyphIndexes = new Dictionary <int, int>();
int charStringsOffset = (int)topDict.Get(Dict.OperatorEnum.CharStrings, 0);
Index charStringsIndex = Index.Parse(fontData, charStringsOffset);
fontData.Seek(charsetOffset);
int charsetFormat = fontData.ReadByte();
for (int index = 1, count = charStringsIndex.Count; index <= count;)
{
switch (charsetFormat)
{
case 0:
glyphIndexes[index++] = ToUnicode(fontData.ReadUnsignedShort());
break;
case 1:
case 2:
{
int first = fontData.ReadUnsignedShort();
int nLeft = (charsetFormat == 1 ? fontData.ReadByte() : fontData.ReadUnsignedShort());
for (int rangeItemIndex = first, rangeItemEndIndex = first + nLeft; rangeItemIndex <= rangeItemEndIndex; rangeItemIndex++)
{
glyphIndexes[index++] = ToUnicode(rangeItemIndex);
}
}
break;
}
}
}
}
catch (Exception e)
{ throw e; }
}
private void WriteFromTo(IInputStream from, IOutputStream to)
{
while (!from.IsEof)
{
to.WriteByte(( byte )from.ReadByte());
}
}
public int ReadByte()
{
if (_byteslength != 0)
{
_byteslength--;
return(_currentValue);
}
if (IsEof)
{
return(-1);
}
_currentValue = ( byte )_inputStream.ReadByte();
if (_currentValue != RleMarker)
{
return(_currentValue);
}
if (IsEof)
{
throw new ApplicationException($"After rleMarker={RleMarker} can be one or more bytes");
}
_currentValue = ( byte )_inputStream.ReadByte();
if (_currentValue == RleMarker)
{
return(RleMarker);
}
_byteslength = _currentValue + 4;
if (IsEof)
{
throw new ApplicationException($"After length={RleMarker} marker can be one or more bytes");
}
_currentValue = ( byte )_inputStream.ReadByte();
_byteslength--;
return(_currentValue);
}
public static Index Parse(IInputStream stream)
{
byte[][] data = new byte[stream.ReadUnsignedShort()][];
{
int[] offsets = new int[data.Length + 1];
int offSize = stream.ReadByte();
for (int index = 0, count = offsets.Length; index < count; index++)
{
offsets[index] = stream.ReadInt(offSize);
}
for (int index = 0, count = data.Length; index < count; index++)
{
stream.Read(data[index] = new byte[offsets[index + 1] - offsets[index]]);
}
}
return(new Index(data));
}
/**
* <summary>Moves the pointer to the next token.</summary>
* <remarks>To properly parse the current token, the pointer MUST be just before its starting
* (leading whitespaces are ignored). When this method terminates, the pointer IS
* at the last byte of the current token.</remarks>
* <returns>Whether a new token was found.</returns>
*/
public virtual bool MoveNext(
)
{
StringBuilder buffer = null;
token = null;
int c = 0;
// Skip leading white-space characters.
do
{
c = stream.ReadByte();
if (c == -1)
{
return(false);
}
} while(IsWhitespace(c)); // Keep goin' till there's a white-space character...
// Which character is it?
switch (c)
{
case Symbol.Slash: // Name.
{
tokenType = TokenTypeEnum.Name;
/*
* NOTE: As name objects are simple symbols uniquely defined by sequences of characters,
* the bytes making up the name are never treated as text, so here they are just
* passed through without unescaping.
*/
buffer = new StringBuilder();
while (true)
{
c = stream.ReadByte();
if (c == -1)
{
break; // NOOP.
}
if (IsDelimiter(c) || IsWhitespace(c))
{
break;
}
buffer.Append((char)c);
}
if (c > -1)
{
stream.Skip(-1);
} // Restores the first byte after the current token.
} break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '.':
case '-':
case '+': // Number.
{
if (c == '.')
{
tokenType = TokenTypeEnum.Real;
}
else // Digit or signum.
{
tokenType = TokenTypeEnum.Integer;
} // By default (it may be real).
// Building the number...
buffer = new StringBuilder();
while (true)
{
buffer.Append((char)c);
c = stream.ReadByte();
if (c == -1)
{
break; // NOOP.
}
else if (c == '.')
{
tokenType = TokenTypeEnum.Real;
}
else if (c < '0' || c > '9')
{
break;
}
}
if (c > -1)
{
stream.Skip(-1);
} // Restores the first byte after the current token.
} break;
case Symbol.OpenSquareBracket: // Array (begin).
tokenType = TokenTypeEnum.ArrayBegin;
break;
case Symbol.CloseSquareBracket: // Array (end).
tokenType = TokenTypeEnum.ArrayEnd;
break;
case Symbol.OpenAngleBracket: // Dictionary (begin) | Hexadecimal string.
{
c = stream.ReadByte();
if (c == -1)
{
throw new ParseException("Unexpected EOF (isolated opening angle-bracket character).");
}
// Is it a dictionary (2nd angle bracket)?
if (c == Symbol.OpenAngleBracket)
{
tokenType = TokenTypeEnum.DictionaryBegin;
break;
}
// Hexadecimal string (single angle bracket).
tokenType = TokenTypeEnum.Hex;
buffer = new StringBuilder();
while (c != Symbol.CloseAngleBracket) // NOT string end.
{
if (!IsWhitespace(c))
{
buffer.Append((char)c);
}
c = stream.ReadByte();
if (c == -1)
{
throw new ParseException("Unexpected EOF (malformed hex string).");
}
}
} break;
case Symbol.CloseAngleBracket: // Dictionary (end).
{
c = stream.ReadByte();
if (c != Symbol.CloseAngleBracket)
{
throw new ParseException("Malformed dictionary.", stream.Position);
}
tokenType = TokenTypeEnum.DictionaryEnd;
} break;
case Symbol.OpenRoundBracket: // Literal string.
{
tokenType = TokenTypeEnum.Literal;
buffer = new StringBuilder();
int level = 0;
while (true)
{
c = stream.ReadByte();
if (c == -1)
{
break;
}
else if (c == Symbol.OpenRoundBracket)
{
level++;
}
else if (c == Symbol.CloseRoundBracket)
{
level--;
}
else if (c == '\\')
{
bool lineBreak = false;
c = stream.ReadByte();
switch (c)
{
case 'n':
c = Symbol.LineFeed;
break;
case 'r':
c = Symbol.CarriageReturn;
break;
case 't':
c = '\t';
break;
case 'b':
c = '\b';
break;
case 'f':
c = '\f';
break;
case Symbol.OpenRoundBracket:
case Symbol.CloseRoundBracket:
case '\\':
break;
case Symbol.CarriageReturn:
lineBreak = true;
c = stream.ReadByte();
if (c != Symbol.LineFeed)
{
stream.Skip(-1);
}
break;
case Symbol.LineFeed:
lineBreak = true;
break;
default:
{
// Is it outside the octal encoding?
if (c < '0' || c > '7')
{
break;
}
// Octal.
int octal = c - '0';
c = stream.ReadByte();
// Octal end?
if (c < '0' || c > '7')
{
c = octal; stream.Skip(-1); break;
}
octal = (octal << 3) + c - '0';
c = stream.ReadByte();
// Octal end?
if (c < '0' || c > '7')
{
c = octal; stream.Skip(-1); break;
}
octal = (octal << 3) + c - '0';
c = octal & 0xff;
break;
}
}
if (lineBreak)
{
continue;
}
if (c == -1)
{
break;
}
}
else if (c == Symbol.CarriageReturn)
{
c = stream.ReadByte();
if (c == -1)
{
break;
}
else if (c != Symbol.LineFeed)
{
c = Symbol.LineFeed; stream.Skip(-1);
}
}
if (level == -1)
{
break;
}
buffer.Append((char)c);
}
if (c == -1)
{
throw new ParseException("Malformed literal string.");
}
} break;
case Symbol.Percent: // Comment.
{
tokenType = TokenTypeEnum.Comment;
buffer = new StringBuilder();
while (true)
{
c = stream.ReadByte();
if (c == -1 ||
IsEOL(c))
{
break;
}
buffer.Append((char)c);
}
} break;
default: // Keyword.
{
tokenType = TokenTypeEnum.Keyword;
buffer = new StringBuilder();
do
{
buffer.Append((char)c);
c = stream.ReadByte();
if (c == -1)
{
break;
}
} while(!IsDelimiter(c) && !IsWhitespace(c));
if (c > -1)
{
stream.Skip(-1);
} // Restores the first byte after the current token.
} break;
}
if (buffer != null)
{
switch (tokenType)
{
case TokenTypeEnum.Keyword:
{
token = buffer.ToString();
switch ((string)token)
{
case Keyword.False:
case Keyword.True: // Boolean.
tokenType = TokenTypeEnum.Boolean;
token = bool.Parse((string)token);
break;
case Keyword.Null: // Null.
tokenType = TokenTypeEnum.Null;
token = null;
break;
}
} break;
case TokenTypeEnum.Name:
case TokenTypeEnum.Literal:
case TokenTypeEnum.Hex:
case TokenTypeEnum.Comment:
token = buffer.ToString();
break;
case TokenTypeEnum.Integer:
token = Int32.Parse(
buffer.ToString(),
NumberStyles.Integer,
StandardNumberFormatInfo
);
break;
case TokenTypeEnum.Real:
token = Double.Parse(
buffer.ToString(),
NumberStyles.Float,
StandardNumberFormatInfo
);
break;
}
}
return(true);
}
public static Dict Parse(
IInputStream stream
)
{
IDictionary <int, IList <object> > entries = new Dictionary <int, IList <object> >();
IList <object> operands = null;
while (true)
{
int b0 = stream.ReadByte();
if (b0 == -1)
{
break;
}
if (b0 >= 0 && b0 <= 21) // Operator.
{
int @operator = b0;
if (b0 == 12) // 2-byte operator.
{
@operator = @operator << 8 + stream.ReadByte();
}
/*
* NOTE: In order to resiliently support unknown operators on parsing, parsed operators
* are not directly mapped to OperatorEnum.
*/
entries[@operator] = operands;
operands = null;
}
else // Operand.
{
if (operands == null)
{
operands = new List <object>();
}
if (b0 == 28) // 3-byte integer.
{
operands.Add(stream.ReadByte() << 8 + stream.ReadByte());
}
else if (b0 == 29) // 5-byte integer.
{
operands.Add(stream.ReadByte() << 24 + stream.ReadByte() << 16 + stream.ReadByte() << 8 + stream.ReadByte());
}
else if (b0 == 30) // Variable-length real.
{
StringBuilder operandBuilder = new StringBuilder();
bool ended = false;
do
{
int b = stream.ReadByte();
int[] nibbles = { (b >> 4) & 0xf, b & 0xf };
foreach (int nibble in nibbles)
{
switch (nibble)
{
case 0x0:
case 0x1:
case 0x2:
case 0x3:
case 0x4:
case 0x5:
case 0x6:
case 0x7:
case 0x8:
case 0x9:
operandBuilder.Append(nibble);
break;
case 0xa: // Decimal point.
operandBuilder.Append(".");
break;
case 0xb: // Positive exponent.
operandBuilder.Append("E");
break;
case 0xc: // Negative exponent.
operandBuilder.Append("E-");
break;
case 0xd: // Reserved.
break;
case 0xe: // Minus.
operandBuilder.Append("-");
break;
case 0xf: // End of number.
ended = true;
break;
}
}
} while(!ended);
operands.Add(ConvertUtils.ParseDoubleInvariant(operandBuilder.ToString()));
}
else if (b0 >= 32 && b0 <= 246) // 1-byte integer.
{
operands.Add(b0 - 139);
}
else if (b0 >= 247 && b0 <= 250) // 2-byte positive integer.
{
operands.Add((b0 - 247) << 8 + stream.ReadByte() + 108);
}
else if (b0 >= 251 && b0 <= 254) // 2-byte negative integer.
{
operands.Add(-(b0 - 251) << 8 - stream.ReadByte() - 108);
}
else // Reserved.
{ /* NOOP */
}
}
}
return(new Dict(entries));
}
public object UnpackNull()
{
byte markerByte = _in.ReadByte();
if (markerByte != NULL)
{
throw new ArgumentOutOfRangeException(nameof(markerByte), markerByte,
$"Expected a null, but got: 0x{(markerByte & 0xFF).ToString("X2")}");
}
return(null);
}
public int ReadByte()
{
int value = _inputStream.ReadByte();
return(value != -1 ? _decodingShuffledBytes[value] : -1);
}
/**
* <summary>Parses the next token [PDF:1.6:3.1].</summary>
* <remarks>To properly parse the current token, the pointer MUST be just before its starting
* (leading whitespaces are ignored). When this method terminates, the pointer IS
* at the last byte of the current token.</remarks>
* <returns>Whether a new token was found.</returns>
*/
public bool MoveNext(
)
{
/*
* NOTE: It'd be interesting to evaluate an alternative regular-expression-based
* implementation...
*/
StringBuilder buffer = null;
token = null;
int c = 0;
// Skip white-space characters [PDF:1.6:3.1.1].
do
{
c = stream.ReadByte();
if (c == -1)
{
return(false);
}
} while(IsWhitespace(c)); // Keep goin' till there's a white-space character...
// Which character is it?
switch (c)
{
case Symbol.Slash: // Name.
tokenType = TokenTypeEnum.Name;
buffer = new StringBuilder();
while (true)
{
c = stream.ReadByte();
if (c == -1)
{
throw new FileFormatException("Unexpected EOF (malformed name object).", stream.Position);
}
if (IsDelimiter(c) || IsWhitespace(c))
{
break;
}
buffer.Append((char)c);
}
stream.Skip(-1); // Recover the first byte after the current token.
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '.':
case '-':
case '+': // Number [PDF:1.6:3.2.2] | Indirect reference.
switch (c)
{
case '.': // Decimal point.
tokenType = TokenTypeEnum.Real;
break;
case '-':
case '+': // Signum.
tokenType = TokenTypeEnum.Integer; // By default (it may be real).
break;
default: // Digit.
if (multipleTokenParsing) // Plain number (multiple token parsing -- see indirect reference search).
{
tokenType = TokenTypeEnum.Integer; // By default (it may be real).
}
else // Maybe an indirect reference (postfix notation [PDF:1.6:3.2.9]).
{
/*
* NOTE: We need to identify this pattern:
* ref := { int int 'R' }
*/
// Enable multiple token parsing!
// NOTE: This state MUST be disabled before returning.
multipleTokenParsing = true;
// 1. Object number.
// Try the possible object number!
stream.Skip(-1); MoveNext();
// Isn't it a valid object number?
if (tokenType != TokenTypeEnum.Integer)
{
// Disable multiple token parsing!
multipleTokenParsing = false;
return(true);
}
// Assign object number!
int objectNumber = (int)token;
// Backup the recovery position!
long oldOffset = stream.Position;
// 2. Generation number.
// Try the possible generation number!
MoveNext();
// Isn't it a valid generation number?
if (tokenType != TokenTypeEnum.Integer)
{
// Rollback!
stream.Seek(oldOffset);
token = objectNumber; tokenType = TokenTypeEnum.Integer;
// Disable multiple token parsing!
multipleTokenParsing = false;
return(true);
}
// Assign generation number!
int generationNumber = (int)token;
// 3. Reference keyword.
// Try the possible reference keyword!
MoveNext();
// Isn't it a valid reference keyword?
if (tokenType != TokenTypeEnum.Reference)
{
// Rollback!
stream.Seek(oldOffset);
token = objectNumber; tokenType = TokenTypeEnum.Integer;
// Disable multiple token parsing!
multipleTokenParsing = false;
return(true);
}
token = new Reference(objectNumber, generationNumber);
// Disable multiple token parsing!
multipleTokenParsing = false;
return(true);
}
break;
}
// Building the number...
buffer = new StringBuilder();
do
{
buffer.Append((char)c);
c = stream.ReadByte();
if (c == -1)
{
throw new FileFormatException("Unexpected EOF (malformed number object).", stream.Position);
}
if (c == '.')
{
tokenType = TokenTypeEnum.Real;
}
else if (c < '0' || c > '9')
{
break;
}
} while(true);
stream.Skip(-1); // Recover the first byte after the current token.
break;
case Symbol.OpenSquareBracket: // Array (begin).
tokenType = TokenTypeEnum.ArrayBegin;
break;
case Symbol.CloseSquareBracket: // Array (end).
tokenType = TokenTypeEnum.ArrayEnd;
break;
case Symbol.OpenAngleBracket: // Dictionary (begin) | Hexadecimal string.
c = stream.ReadByte();
if (c == -1)
{
throw new FileFormatException("Unexpected EOF (isolated opening angle-bracket character).", stream.Position);
}
// Is it a dictionary (2nd angle bracket [PDF:1.6:3.2.6])?
if (c == Symbol.OpenAngleBracket)
{
tokenType = TokenTypeEnum.DictionaryBegin;
break;
}
// Hexadecimal string (single angle bracket [PDF:1.6:3.2.3]).
tokenType = TokenTypeEnum.Hex;
// [FIX:0.0.4:4] It skipped after the first hexadecimal character, missing it.
buffer = new StringBuilder();
while (c != Symbol.CloseAngleBracket) // NOT string end.
{
buffer.Append((char)c);
c = stream.ReadByte();
if (c == -1)
{
throw new FileFormatException("Unexpected EOF (malformed hex string).", stream.Position);
}
}
break;
case Symbol.CloseAngleBracket: // Dictionary (end).
c = stream.ReadByte();
if (c != Symbol.CloseAngleBracket)
{
throw new FileFormatException("Malformed dictionary.", stream.Position);
}
tokenType = TokenTypeEnum.DictionaryEnd;
break;
case Symbol.OpenRoundBracket: // Literal string.
tokenType = TokenTypeEnum.Literal;
buffer = new StringBuilder();
int level = 0;
while (true)
{
c = stream.ReadByte();
if (c == -1)
{
break;
}
if (c == Symbol.OpenRoundBracket)
{
level++;
}
else if (c == Symbol.CloseRoundBracket)
{
level--;
}
else if (c == '\\')
{
bool lineBreak = false;
c = stream.ReadByte();
switch (c)
{
case 'n':
c = Symbol.LineFeed;
break;
case 'r':
c = Symbol.CarriageReturn;
break;
case 't':
c = '\t';
break;
case 'b':
c = '\b';
break;
case 'f':
c = '\f';
break;
case Symbol.OpenRoundBracket:
case Symbol.CloseRoundBracket:
case '\\':
break;
case Symbol.CarriageReturn:
lineBreak = true;
c = stream.ReadByte();
if (c != Symbol.LineFeed)
{
stream.Skip(-1);
}
break;
case Symbol.LineFeed:
lineBreak = true;
break;
default:
{
// Is it outside the octal encoding?
if (c < '0' || c > '7')
{
break;
}
// Octal [PDF:1.6:3.2.3].
int octal = c - '0';
c = stream.ReadByte();
// Octal end?
if (c < '0' || c > '7')
{
c = octal; stream.Skip(-1); break;
}
octal = (octal << 3) + c - '0';
c = stream.ReadByte();
// Octal end?
if (c < '0' || c > '7')
{
c = octal; stream.Skip(-1); break;
}
octal = (octal << 3) + c - '0';
c = octal & 0xff;
break;
}
}
if (lineBreak)
{
continue;
}
if (c == -1)
{
break;
}
}
else if (c == Symbol.CarriageReturn)
{
c = stream.ReadByte();
if (c == -1)
{
break;
}
if (c != Symbol.LineFeed)
{
c = Symbol.LineFeed; stream.Skip(-1);
}
}
if (level == -1)
{
break;
}
buffer.Append((char)c);
}
if (c == -1)
{
throw new FileFormatException("Malformed literal string.", stream.Position);
}
break;
case Symbol.CapitalR: // Indirect reference.
tokenType = TokenTypeEnum.Reference;
break;
case Symbol.Percent: // Comment [PDF:1.6:3.1.2].
tokenType = TokenTypeEnum.Comment;
buffer = new StringBuilder();
while (true)
{
c = stream.ReadByte();
if (c == -1 ||
IsEOL(c))
{
break;
}
buffer.Append((char)c);
}
break;
default: // Keyword object.
tokenType = TokenTypeEnum.Keyword;
buffer = new StringBuilder();
do
{
buffer.Append((char)c);
c = stream.ReadByte();
if (c == -1)
{
break;
}
} while(!IsDelimiter(c) && !IsWhitespace(c));
stream.Skip(-1); // Recover the first byte after the current token.
break;
}
if (buffer != null)
{
/*
* Current token initialization.
*/
// Wich token type?
switch (tokenType)
{
case TokenTypeEnum.Keyword:
token = buffer.ToString();
// Late recognition.
switch ((string)token)
{
case Keyword.False:
case Keyword.True: // Boolean.
tokenType = TokenTypeEnum.Boolean;
token = bool.Parse((string)token);
break;
case Keyword.Null: // Null.
tokenType = TokenTypeEnum.Null;
token = null;
break;
}
break;
case TokenTypeEnum.Comment:
case TokenTypeEnum.Hex:
case TokenTypeEnum.Name:
token = buffer.ToString();
break;
case TokenTypeEnum.Literal:
token = buffer.ToString();
// Late recognition.
if (((string)token).StartsWith(Keyword.DatePrefix)) // Date.
{
tokenType = TokenTypeEnum.Date;
token = PdfDate.ToDate((string)token);
}
break;
case TokenTypeEnum.Integer:
token = Int32.Parse(
buffer.ToString(),
NumberStyles.Integer,
StandardNumberFormatInfo
);
break;
case TokenTypeEnum.Real:
// [FIX:1668410] Parsing of float numbers was buggy (localized default number format).
token = Single.Parse(
buffer.ToString(),
NumberStyles.Float,
StandardNumberFormatInfo
);
break;
}
}
return(true);
}
public object UnpackNull()
{
byte markerByte = _in.ReadByte();
if (markerByte != NULL)
{
throw new ProtocolException(
$"Expected a null, but got: 0x{(markerByte & 0xFF).ToString("X2")}");
}
return(null);
}
