SWAB(3TIFF)                                           SWAB(3TIFF)



NAME
       TIFFGetBitRevTable,  TIFFReverseBits, TIFFSwabShort, TIFF-
       SwabLong,  TIFFSwabArrayOfShort,   TIFFSwabArrayOfLong   -
       byte- and bit-swapping routines

SYNOPSIS
       #include 

       const unsigned char* TIFFGetBitRevTable(int reversed)
       void TIFFReverseBits(u_char *data, unsigned long nbytes)
       void TIFFSwabShort(uint16 *data)
       void TIFFSwabLong(uint32 *data)
       void   TIFFSwabArrayOfShort(uint16  *data,  unsigned  long
       nshorts)
       void  TIFFSwabArrayOfLong(uint32  *data,   unsigned   long
       nlongs)

DESCRIPTION
       The following routines are used by the library to swap 16-
       and 32-bit data and to reverse the order of bits in bytes.

       TIFFSwabShort  and TIFFSwabLong swap the bytes in a single
       16-bit and 32-bit  item,  respectively.   TIFFSwabArrayOf-
       Short  and  TIFFSwabArrayOfLong swap the bytes in an array
       of 16-bit and 32-bit items, respectively.

       TIFFReverseBits replaces each byte in data with the equiv-
       alent bit-reversed value. This operation is performed with
       a lookup table, which is  returned  using  the  TIFFGetBi-
       tRevTable  function.   reversed  parameter specifies which
       table should be returned. Supply 1 if you want bit  rever-
       sal  table.  Supply 0 to get the table that do not reverse
       bit values. It is a lookup table that can be  used  as  an
       identity function; i.e.  TIFFNoBitRevTable[n] == n.

DIAGNOSTICS
       None.

SEE ALSO
       libtiff(3TIFF)

       Libtiff    library   home   page:   http://www.remotesens-
       ing.org/libtiff/



libtiff                 November 04, 2004             SWAB(3TIFF)