SWAB(3TIFF) SWAB(3TIFF)
NAME
TIFFGetBitRevTable, TIFFReverseBits, TIFFSwabShort, TIFFSwabLong, TIFF-
SwabArrayOfShort, 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_t *data)
void TIFFSwabLong(uint32_t *data)
void TIFFSwabArrayOfShort(uint16_t *data, unsigned long nshorts)
void TIFFSwabArrayOfLong(uint32_t *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-re-
versed value. This operation is performed with a lookup table, which is
returned using the TIFFGetBitRevTable function. reversed parameter
specifies which table should be returned. Supply 1 if you want bit re-
versal 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.simplesystems.org/libtiff/
libtiff November 04, 2004 SWAB(3TIFF)
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