SWAB(3T)
NAME
- TIFFReverseBits, TIFFSwabShort, TIFFSwabLong, TIFFSwabArrayOfShort,
TIFFSwabArrayOfLong - byte- and bit-swapping routines
SYNOPSIS
- #include <tiffio.h>
- 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. TIFFSwabArrayOfShort and TIFFSwabArrayOfLong
swap the bytes in an array of 16-bit and 32-bit items, respectively.
- TIFFReverseBits replaces each byte in data with the equivalent bit-
reversed value. This operation is done with a lookup table,
TIFFBitRevTable which is declared public. A second table,
TIFFNoBitRevTable is also declared public; it is a lookup table that can
be used as an identity function; i.e. TIFFNoBitRevTable[n] == n.
DIAGNOSTICS
- None.
SEE ALSO
- libtiff(3T),