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SWAB(3TIFF)                                                        SWAB(3TIFF)

NAME

TIFFGetBitRevTable, 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_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 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

None.

SEE ALSO

libtiff(3TIFF) Libtiff library home page: http://www.simplesystems.org/libtiff/ libtiff November 4, 2004 SWAB(3TIFF) SWAB(3TIFF) SWAB(3TIFF)

NAME

TIFFGetBitRevTable, 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_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 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

None.

SEE ALSO

libtiff(3TIFF) Libtiff library home page: http://www.simplesystems.org/libtiff/ libtiff November 4, 2004 SWAB(3TIFF)

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