Ejemplo n.º 1
0
        protected IPDFToken ReadComment()
        {
            // Some PDFs have an object immediately following the %%EOF without an intervening line break
            if (reader.Find("%EOF") == 0)
            {
                reader.Read(4);
                return(new PDFToken(PDFTokenType.EOF));
            }
            else
            {
                string str = ISO88591.GetString(reader.ReadUntilAny("\r\n", true));

                if (str.StartsWith("PDF-1.") && str.Length == 7 && str[6] >= '0' && str[6] <= '7')
                {
                    return(new PDFVersion {
                        Minor = str[6] - '0'
                    });
                }
                else
                {
                    return(new PDFComment {
                        Value = str
                    });
                }
            }
        }
Ejemplo n.º 2
0
        protected IPDFToken ReadKeyword()
        {
            string keyword = ISO88591.GetString(reader.ReadUntilAny(" \t\r\f\n%/[]<>()"));

            if (keyword == "stream" && UseStreamKeyword)
            {
                return(ReadStream());
            }

            return(new PDFKeyword {
                Name = keyword
            });
        }
Ejemplo n.º 3
0
        protected IPDFToken ReadNumber()
        {
            bool        isdouble = false;
            List <byte> data     = new List <byte>();

            if (reader.Peek == '-')
            {
                data.Add(reader.Read());
            }
            else if (reader.Peek == '+')
            {
                reader.Read();
            }

            data.AddRange(reader.ReadWhileAny("0123456789"));

            if (reader.Peek == '.')
            {
                data.Add(reader.Read());
                isdouble = true;
            }

            data.AddRange(reader.ReadWhileAny("0123456789"));

            string numstr = ISO88591.GetString(data.ToArray());

            if (isdouble)
            {
                return(new PDFDouble {
                    Value = Convert.ToDouble(numstr.Trim('0') + "0")
                });
            }
            else
            {
                return(new PDFInteger {
                    Value = Convert.ToInt64(numstr, 10)
                });
            }
        }
Ejemplo n.º 4
0
 public int Skip(string skip, bool permiteof = false)
 {
     return(Skip(ISO88591.GetBytes(skip), permiteof));
 }
Ejemplo n.º 5
0
 public int Find(string find, string final = null, bool permiteof = false)
 {
     return(Find(ISO88591.GetBytes(find), final == null ? null : ISO88591.GetBytes(final), permiteof));
 }
Ejemplo n.º 6
0
 public int FindAny(string find, bool permiteof = false)
 {
     return(FindAny(ISO88591.GetBytes(find), permiteof));
 }
Ejemplo n.º 7
0
        protected IPDFToken ReadStringLiteral()
        {
            List <byte> bytes      = new List <byte>();
            int         parenlevel = 1;

            while (parenlevel >= 1)
            {
                byte c = reader.Read();

                if (c == '\\')
                {
                    c = reader.Read();
                    if (c >= '0' && c <= '3')
                    {
                        int octal = c - '0';
                        if (reader.Peek >= '0' && reader.Peek <= '7')
                        {
                            octal = octal * 8 + (reader.Read() - '0');
                            if (reader.Peek >= '0' && reader.Peek <= '7')
                            {
                                octal = octal * 8 + (reader.Read() - '0');
                            }
                        }

                        bytes.Add((byte)octal);
                    }
                    else if (c == '\r')
                    {
                        if (reader.Peek == '\n')
                        {
                            reader.Read();
                        }
                    }
                    else if (c != '\n')
                    {
                        switch ((char)c)
                        {
                        case 'n': bytes.Add((byte)'\n'); break;

                        case 'r': bytes.Add((byte)'\r'); break;

                        case 't': bytes.Add((byte)'\t'); break;

                        case 'b': bytes.Add((byte)'\b'); break;

                        case 'f': bytes.Add((byte)'\f'); break;

                        default: bytes.Add(c); break;
                        }
                    }
                }
                else if (c == '(')
                {
                    parenlevel++;
                    bytes.Add((byte)'(');
                }
                else if (c == ')')
                {
                    parenlevel--;
                    if (parenlevel >= 1)
                    {
                        bytes.Add((byte)')');
                    }
                }
                else
                {
                    bytes.Add(c);
                }
            }

            if (bytes.Count >= 2 && (bytes.Count % 2) == 0 && bytes[0] == 0xFE && bytes[1] == 0xFF)
            {
                char[] chars = new char[bytes.Count / 2 - 1];

                for (int i = 0; i < chars.Length; i++)
                {
                    chars[i] = (char)(((int)bytes[i * 2 + 2] << 8) | (int)bytes[i * 2 + 3]);
                }

                return(new PDFString {
                    Value = new String(chars)
                });
            }
            else if (bytes.Count >= 2 && (bytes.Count % 2) == 0 && bytes[0] == 0xFF && bytes[1] == 0xFE)
            {
                char[] chars = new char[bytes.Count / 2 - 1];

                for (int i = 0; i < chars.Length; i++)
                {
                    chars[i] = (char)(((int)bytes[i * 2 + 3] << 8) | (int)bytes[i * 2 + 2]);
                }

                return(new PDFString {
                    Value = new String(chars)
                });
            }
            else
            {
                return(new PDFString {
                    Value = ISO88591.GetString(bytes.ToArray())
                });
            }
        }