SWAB(3T)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 TIFFSwabArrayOf‐
Long swap the bytes in an array of 16-bit and 32-bit items, respec‐
tively.
TIFFReverseBits replaces each byte in data with the equivalent bit-
reversed value. This operation is done with a lookup table, TIFFBi‐
tRevTable 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 ALSOlibtiff(3T),
December 16, 1991 SWAB(3T)
