Mercurial > octave
view scripts/strings/hex2dec.m @ 28236:5bb1c0cbb27e
dec2bin.m: Allow negative number inputs (bug #58147).
* dec2bin.m: Document that negative numbers are converted according to 2's
complement convention. Add example to documentation of converting a
negative number. Add algorithm to detect negative inputs and add the
appropriate offset for 2's complement notation. Add BIST tests.
author | Nicholas R. Jankowski <jankowskin@asme.org> |
---|---|
date | Wed, 22 Apr 2020 15:53:51 -0700 |
parents | 9f9ac219896d |
children | d8318c12d903 0a5b15007766 |
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######################################################################## ## ## Copyright (C) 1996-2020 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave 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. ## ## Octave 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 Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {} hex2dec (@var{s}) ## Return the integer corresponding to the hexadecimal number represented by ## the string @var{s}. ## ## For example: ## ## @example ## @group ## hex2dec ("12B") ## @result{} 299 ## hex2dec ("12b") ## @result{} 299 ## @end group ## @end example ## ## If @var{s} is a string matrix, return a column vector with one converted ## number per row of @var{s}; Invalid rows evaluate to NaN@. ## ## If @var{s} is a cell array of strings, return a column vector with one ## converted number per cell element in @var{s}. ## ## @seealso{dec2hex, base2dec, bin2dec} ## @end deftypefn function d = hex2dec (s) if (nargin != 1) print_usage (); endif d = base2dec (s, 16); endfunction %!assert (hex2dec ("0000"), 0) %!assert (hex2dec ("1FFFFFFFFFFFFF"), 2^53-1) %!assert (hex2dec (["12b"; "12B"]), [299; 299]) %!assert (hex2dec ({"A1", "1A"}), [161; 26]) ## Test input validation %!error hex2dec () %!error hex2dec (1) %!error hex2dec ("1", 2)