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SWAB

NAME

SYNOPSIS

DESCRIPTION

DIAGNOSTICS

SEE ALSO

NAME

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TIFFGetBitRevTable, TIFFReverseBits, TIFFSwabShort,

TIFFSwabLong, TIFFSwabArrayOfShort, TIFFSwabArrayOfLong

− byte- and bit-swapping routines

SYNOPSIS

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#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

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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

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 reversal 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

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None.

SEE ALSO

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libtiff(3TIFF)

Libtiff library home page:

http://www.remotesensing.org/libtiff/