songdbj/FileEntry.java

   1 import java.io.*;
   2
   3 public class FileEntry extends Entry implements Comparable {
   4                 protected String filename;
   5                 protected int hash;
   6                 protected SongEntry sentry;
   7                 protected RundbEntry rentry;
   8                 protected File file;
   9
  10                 public FileEntry(File f) throws FileNotFoundException, IOException {
  11                         filename=convertPath(f.getAbsolutePath());
  12                         file=f;
  13                         sentry=null;
  14                         rentry=null;
  15                 }
  16
  17     public int compareTo(Object o) {
  18           return String.CASE_INSENSITIVE_ORDER.compare(filename,((FileEntry)o).getFilename());
  19     }
  20
  21     public String getFilename() { return filename; }
  22
  23                 public File getFile() { return file; }
  24
  25                 protected void calcHash() throws FileNotFoundException, IOException {
  26                         DataInputStream r = new DataInputStream(new FileInputStream(file));
  27                         byte[] buf = new byte[32768];
  28                         if(sentry!=null)
  29                                 r.skip(sentry.getFirstFrameOffset());
  30                         r.read(buf);
  31                         hash=CalcCRC32(buf);
  32                         r.close();
  33                 }
  34
  35                 public int getHash() { return hash; }
  36
  37                 public static String add(String t) {
  38                         String add=TagDatabase.getInstance().add;
  39                         if(add!=null)
  40                                 return add+t;
  41                         else
  42                                 return t;
  43                 }
  44
  45                 public static String convertPath(String t) {
  46                         String temp = add(strip(t)).replace('\\','/');
  47                         if (temp.charAt(0)!='/')
  48                                 temp="/"+temp;
  49                         return temp;
  50                 }
  51
  52                 public static String strip(String t) {
  53                         return stripPrefix(stripDriveletter(stripPrefix(t)));
  54                 }
  55
  56                 public static String stripPrefix(String t) {
  57                         String prefix=TagDatabase.getInstance().strip;
  58                         if(prefix!=null&&t.toLowerCase().startsWith(prefix.toLowerCase())) {
  59                                 return t.substring(prefix.length());
  60                         }
  61                         return t;
  62                 }
  63
  64                 public static String stripDriveletter(String t) {
  65                         if(t.indexOf(':')==1) { // second char is ':'
  66                                 return t.substring(2);
  67                         }
  68                         return t;
  69                 }
  70
  71                 public void setSongEntry(SongEntry e) { sentry=e; try { calcHash(); } catch(Exception d) { } }
  72                 public void setRundbEntry(RundbEntry e) { rentry=e; }
  73                 public SongEntry getSongEntry() { return sentry; }
  74                 public RundbEntry getRundbEntry() { return rentry; }
  75                 public int getSongEntryOffset() {
  76                         if(sentry!=null)
  77                                 return sentry.getOffset();
  78                         else
  79                                 return -1;
  80                 }
  81                 public int getRundbEntryOffset() {
  82 /*                      if(rentry!=null)
  83                                 return rentry.getOffset();
  84                         else*/
  85                                 return -1;
  86                 }
  87   public void write(DataOutputStream w) throws IOException {
  88                         String name=getFilename();
  89                         w.writeBytes(name);
  90                         for(int x=TagDatabase.getInstance().filelen-name.length();x>0;x--)
  91                                 w.write(0);
  92                         w.writeInt(hash);
  93                         w.writeInt(getSongEntryOffset());
  94                         w.writeInt(getRundbEntryOffset());
  95         }
  96
  97         public static int entrySize() {
  98                 return TagDatabase.getInstance().filelen+12;
  99         }
 100
 101   static final int crc_table[] =
 102         {   // CRC32 lookup table for polynomial 0x04C11DB7
 103                 0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B,
 104                 0x1A864DB2, 0x1E475005, 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61,
 105                 0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD, 0x4C11DB70, 0x48D0C6C7,
 106                 0x4593E01E, 0x4152FDA9, 0x5F15ADAC, 0x5BD4B01B, 0x569796C2, 0x52568B75,
 107                 0x6A1936C8, 0x6ED82B7F, 0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3,
 108                 0x709F7B7A, 0x745E66CD, 0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039,
 109                 0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5, 0xBE2B5B58, 0xBAEA46EF,
 110                 0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033, 0xA4AD16EA, 0xA06C0B5D,
 111                 0xD4326D90, 0xD0F37027, 0xDDB056FE, 0xD9714B49, 0xC7361B4C, 0xC3F706FB,
 112                 0xCEB42022, 0xCA753D95, 0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1,
 113                 0xE13EF6F4, 0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D, 0x34867077, 0x30476DC0,
 114                 0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5, 0x2AC12072,
 115                 0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16, 0x018AEB13, 0x054BF6A4,
 116                 0x0808D07D, 0x0CC9CDCA, 0x7897AB07, 0x7C56B6B0, 0x71159069, 0x75D48DDE,
 117                 0x6B93DDDB, 0x6F52C06C, 0x6211E6B5, 0x66D0FB02, 0x5E9F46BF, 0x5A5E5B08,
 118                 0x571D7DD1, 0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA,
 119                 0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B, 0xBB60ADFC,
 120                 0xB6238B25, 0xB2E29692, 0x8AAD2B2F, 0x8E6C3698, 0x832F1041, 0x87EE0DF6,
 121                 0x99A95DF3, 0x9D684044, 0x902B669D, 0x94EA7B2A, 0xE0B41DE7, 0xE4750050,
 122                 0xE9362689, 0xEDF73B3E, 0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2,
 123                 0xC6BCF05F, 0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34,
 124                 0xDC3ABDED, 0xD8FBA05A, 0x690CE0EE, 0x6DCDFD59, 0x608EDB80, 0x644FC637,
 125                 0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB, 0x4F040D56, 0x4BC510E1,
 126                 0x46863638, 0x42472B8F, 0x5C007B8A, 0x58C1663D, 0x558240E4, 0x51435D53,
 127                 0x251D3B9E, 0x21DC2629, 0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5,
 128                 0x3F9B762C, 0x3B5A6B9B, 0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF,
 129                 0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623, 0xF12F560E, 0xF5EE4BB9,
 130                 0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65, 0xEBA91BBC, 0xEF68060B,
 131                 0xD727BBB6, 0xD3E6A601, 0xDEA580D8, 0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD,
 132                 0xCDA1F604, 0xC960EBB3, 0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7,
 133                 0xAE3AFBA2, 0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B, 0x9B3660C6, 0x9FF77D71,
 134                 0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74, 0x857130C3,
 135                 0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640, 0x4E8EE645, 0x4A4FFBF2,
 136                 0x470CDD2B, 0x43CDC09C, 0x7B827D21, 0x7F436096, 0x7200464F, 0x76C15BF8,
 137                 0x68860BFD, 0x6C47164A, 0x61043093, 0x65C52D24, 0x119B4BE9, 0x155A565E,
 138                 0x18197087, 0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC,
 139                 0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D, 0x2056CD3A,
 140                 0x2D15EBE3, 0x29D4F654, 0xC5A92679, 0xC1683BCE, 0xCC2B1D17, 0xC8EA00A0,
 141                 0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB, 0xDBEE767C, 0xE3A1CBC1, 0xE760D676,
 142                 0xEA23F0AF, 0xEEE2ED18, 0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4,
 143                 0x89B8FD09, 0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662,
 144                 0x933EB0BB, 0x97FFAD0C, 0xAFB010B1, 0xAB710D06, 0xA6322BDF, 0xA2F33668,
 145                 0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4
 146         };
 147
 148   public static int CalcCRC32(byte[] buf) {
 149                         int i;
 150                         int crc = 0xffffffff;
 151       for (i = 0; i < buf.length; i++)
 152          crc = (crc << 8) ^ crc_table[(int)((crc >> 24) ^ buf[i]) & 0xFF];
 153       return crc;
 154     }
 155 }