1 .\" $Header: /CVS_DB/Eos/util/I386LINUX/man/man3/TIFFswab.3t,v 1.1.1.1 2002/02/01 06:40:35 tacyas Exp $
3 .\" Copyright (c) 1988-1997 Sam Leffler
4 .\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
6 .\" Permission to use, copy, modify, distribute, and sell this software and
7 .\" its documentation for any purpose is hereby granted without fee, provided
8 .\" that (i) the above copyright notices and this permission notice appear in
9 .\" all copies of the software and related documentation, and (ii) the names of
10 .\" Sam Leffler and Silicon Graphics may not be used in any advertising or
11 .\" publicity relating to the software without the specific, prior written
12 .\" permission of Sam Leffler and Silicon Graphics.
14 .\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
15 .\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
16 .\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
18 .\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
19 .\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
20 .\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
21 .\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
22 .\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
26 .TH SWAB 3T "December 16, 1991"
28 TIFFReverseBits, TIFFSwabShort, TIFFSwabLong, TIFFSwabArrayOfShort, TIFFSwabArrayOfLong \- byte- and bit-swapping routines
30 .B "#include <tiffio.h>"
32 .B "const unsigned char* TIFFGetBitRevTable(int reversed);"
34 .B "void TIFFReverseBits(u_char* data, unsigned long nbytes)"
36 .B "void TIFFSwabShort(uint16* data)"
38 .B "void TIFFSwabLong(uint32* data)"
40 .B "void TIFFSwabArrayOfShort(uint16* data, unsigned long nshorts)"
42 .B "void TIFFSwabArrayOfLong(uint32* data, unsigned long nlongs)"
44 The following routines are used by the library to swap
45 16- and 32-bit data and to reverse the order of bits in bytes.
50 swap the bytes in a single 16-bit and 32-bit item, respectively.
51 .IR TIFFSwabArrayOfShort
53 .IR TIFFSwabArrayOfLong
54 swap the bytes in an array of 16-bit and 32-bit items, respectively.
59 with the equivalent bit-reversed value.
60 This operation is done with a lookup table,
62 which is declared public.
65 is also declared public; it is a lookup table that
67 .IR "identity function" ;
69 .IR "TIFFNoBitRevTable[n] == n" .