SWAB(3T)SWAB(3T)NAME
TIFFReverseBits, TIFFSwabShort, TIFFSwabLong, TIFFSwabAr-
rayOfShort, 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. 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 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 func-
tion; i.e. TIFFNoBitRevTable[n] == n.
DIAGNOSTICS
None.
SEE ALSOlibtiff(3T),
December 16, 1991 1
