octave-interval 1.4.1-1 / usr / share / octave / packages / interval-1.4.1 / @infsup / intervaltoexact.m

## Copyright 2014-2016 Oliver Heimlich
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, see <http://www.gnu.org/licenses/>.

## -*- texinfo -*-
## @documentencoding UTF-8
## @deftypemethod {@@infsup} {@var{S} =} intervaltoexact (@var{X})
## 
## Build an exact representation of the interval @var{X} in
## hexadecimal-significand form.
##
## The interval boundaries are stored in binary floating point format and can
## be converted to hexadecimal format without precision loss.
##
## The equation @code{@var{X} == exacttointerval (intervaltoexact (@var{X}))}
## holds for all intervals @var{X}.
##
## Accuracy: The output is exact.
## @seealso{exacttointerval}
## @end deftypemethod

## Author: Oliver Heimlich
## Keywords: interval
## Created: 2014-10-01

function s = intervaltoexact (x)

if (nargin ~= 1)
    print_usage ();
    return
endif

s = intervaltotext (x, "exact hexadecimal");

endfunction

%!assert (intervaltoexact (infsup (1 + eps)), "[0X1.0000000000001P+0]");