Mercurial > octave-nkf
view libinterp/corefcn/hex2num.cc @ 17281:bc924baa2c4e
doc: Add new @qcode macro for code samples which are quoted.
Macro handles options ("on") or properties ("position") more elegantly
than @code{"text"}.
* doc/interpreter/macros.texi: Add new @qcode macro.
* doc/interpreter/tips.txi: Add documentation about @qcode macro.
* doc/interpreter/basics.txi, doc/interpreter/container.txi,
doc/interpreter/emacs.txi, doc/interpreter/errors.txi,
doc/interpreter/eval.txi, doc/interpreter/expr.txi,
doc/interpreter/external.txi, doc/interpreter/func.txi,
doc/interpreter/grammar.txi, doc/interpreter/image.txi,
doc/interpreter/install.txi, doc/interpreter/interp.txi,
doc/interpreter/io.txi, doc/interpreter/matrix.txi,
doc/interpreter/numbers.txi, doc/interpreter/oop.txi,
doc/interpreter/package.txi, doc/interpreter/plot.txi,
doc/interpreter/quad.txi, doc/interpreter/sparse.txi,
doc/interpreter/strings.txi, doc/interpreter/system.txi,
doc/interpreter/vectorize.txi, libinterp/corefcn/balance.cc,
libinterp/corefcn/bitfcns.cc, libinterp/corefcn/cellfun.cc,
libinterp/corefcn/conv2.cc, libinterp/corefcn/data.cc,
libinterp/corefcn/debug.cc, libinterp/corefcn/defaults.cc,
libinterp/corefcn/dirfns.cc, libinterp/corefcn/dlmread.cc,
libinterp/corefcn/error.cc, libinterp/corefcn/file-io.cc,
libinterp/corefcn/find.cc, libinterp/corefcn/gammainc.cc,
libinterp/corefcn/graphics.cc, libinterp/corefcn/help.cc,
libinterp/corefcn/hex2num.cc, libinterp/corefcn/input.cc,
libinterp/corefcn/load-path.cc, libinterp/corefcn/load-save.cc,
libinterp/corefcn/ls-oct-ascii.cc, libinterp/corefcn/lu.cc,
libinterp/corefcn/luinc.cc, libinterp/corefcn/matrix_type.cc,
libinterp/corefcn/oct-hist.cc, libinterp/corefcn/pager.cc,
libinterp/corefcn/pr-output.cc, libinterp/corefcn/pt-jit.cc,
libinterp/corefcn/qz.cc, libinterp/corefcn/rand.cc,
libinterp/corefcn/regexp.cc, libinterp/corefcn/schur.cc,
libinterp/corefcn/sighandlers.cc, libinterp/corefcn/sparse.cc,
libinterp/corefcn/spparms.cc, libinterp/corefcn/str2double.cc,
libinterp/corefcn/svd.cc, libinterp/corefcn/symtab.cc,
libinterp/corefcn/syscalls.cc, libinterp/corefcn/toplev.cc,
libinterp/corefcn/tril.cc, libinterp/corefcn/typecast.cc,
libinterp/corefcn/utils.cc, libinterp/corefcn/variables.cc,
libinterp/dldfcn/__init_fltk__.cc, libinterp/dldfcn/chol.cc,
libinterp/dldfcn/colamd.cc, libinterp/dldfcn/fftw.cc, libinterp/dldfcn/qr.cc,
libinterp/dldfcn/symbfact.cc, libinterp/octave-value/ov-base.cc,
libinterp/octave-value/ov-fcn-handle.cc,
libinterp/octave-value/ov-fcn-inline.cc, libinterp/octave-value/ov-java.cc,
libinterp/octave-value/ov-range.cc, libinterp/octave-value/ov-struct.cc,
libinterp/octave-value/ov-usr-fcn.cc, libinterp/parse-tree/oct-parse.in.yy,
libinterp/parse-tree/pt-binop.cc, libinterp/parse-tree/pt-eval.cc,
libinterp/parse-tree/pt-mat.cc, scripts/@ftp/ftp.m,
scripts/deprecated/java_convert_matrix.m, scripts/deprecated/java_debug.m,
scripts/deprecated/java_unsigned_conversion.m, scripts/deprecated/shell_cmd.m,
scripts/general/dblquad.m, scripts/general/display.m,
scripts/general/genvarname.m, scripts/general/idivide.m,
scripts/general/interp1.m, scripts/general/interp2.m,
scripts/general/interp3.m, scripts/general/interpn.m, scripts/general/isa.m,
scripts/general/profexplore.m, scripts/general/profile.m,
scripts/general/quadgk.m, scripts/general/randi.m, scripts/general/structfun.m,
scripts/general/subsindex.m, scripts/general/triplequad.m,
scripts/geometry/griddata.m, scripts/geometry/griddata3.m,
scripts/geometry/griddatan.m, scripts/geometry/voronoi.m, scripts/help/help.m,
scripts/help/lookfor.m, scripts/image/cmpermute.m, scripts/image/colormap.m,
scripts/image/image.m, scripts/image/imagesc.m, scripts/image/imfinfo.m,
scripts/image/imformats.m, scripts/image/imread.m, scripts/image/imshow.m,
scripts/image/imwrite.m, scripts/image/ind2gray.m, scripts/image/lines.m,
scripts/image/rgb2ind.m, scripts/image/spinmap.m, scripts/io/dlmwrite.m,
scripts/io/strread.m, scripts/io/textread.m, scripts/io/textscan.m,
scripts/java/javaclasspath.m, scripts/java/usejava.m,
scripts/miscellaneous/bzip2.m, scripts/miscellaneous/computer.m,
scripts/miscellaneous/copyfile.m, scripts/miscellaneous/debug.m,
scripts/miscellaneous/dos.m, scripts/miscellaneous/edit.m,
scripts/miscellaneous/gzip.m, scripts/miscellaneous/license.m,
scripts/miscellaneous/mkoctfile.m, scripts/miscellaneous/movefile.m,
scripts/miscellaneous/parseparams.m, scripts/miscellaneous/unix.m,
scripts/optimization/fminbnd.m, scripts/optimization/fminsearch.m,
scripts/optimization/fminunc.m, scripts/optimization/fsolve.m,
scripts/optimization/fzero.m, scripts/optimization/glpk.m,
scripts/optimization/lsqnonneg.m, scripts/optimization/optimset.m,
scripts/optimization/pqpnonneg.m, scripts/pkg/pkg.m, scripts/plot/allchild.m,
scripts/plot/ancestor.m, scripts/plot/area.m, scripts/plot/axis.m,
scripts/plot/bar.m, scripts/plot/barh.m, scripts/plot/box.m,
scripts/plot/caxis.m, scripts/plot/cla.m, scripts/plot/clabel.m,
scripts/plot/clf.m, scripts/plot/close.m, scripts/plot/colorbar.m,
scripts/plot/daspect.m, scripts/plot/ezmesh.m, scripts/plot/ezmeshc.m,
scripts/plot/ezsurf.m, scripts/plot/ezsurfc.m, scripts/plot/findall.m,
scripts/plot/findobj.m, scripts/plot/gcbo.m, scripts/plot/gcf.m,
scripts/plot/gco.m, scripts/plot/grid.m, scripts/plot/guihandles.m,
scripts/plot/hdl2struct.m, scripts/plot/hidden.m, scripts/plot/hold.m,
scripts/plot/isonormals.m, scripts/plot/isosurface.m, scripts/plot/legend.m,
scripts/plot/mesh.m, scripts/plot/meshc.m, scripts/plot/meshz.m,
scripts/plot/newplot.m, scripts/plot/orient.m, scripts/plot/pareto.m,
scripts/plot/patch.m, scripts/plot/pbaspect.m, scripts/plot/pcolor.m,
scripts/plot/plot.m, scripts/plot/print.m,
scripts/plot/private/__add_default_menu__.m, scripts/plot/quiver.m,
scripts/plot/quiver3.m, scripts/plot/refreshdata.m, scripts/plot/saveas.m,
scripts/plot/scatter.m, scripts/plot/scatter3.m, scripts/plot/shading.m,
scripts/plot/shrinkfaces.m, scripts/plot/slice.m, scripts/plot/stem.m,
scripts/plot/stem3.m, scripts/plot/struct2hdl.m, scripts/plot/subplot.m,
scripts/plot/surf.m, scripts/plot/surfc.m, scripts/plot/surfl.m,
scripts/plot/tetramesh.m, scripts/plot/uigetfile.m, scripts/plot/uimenu.m,
scripts/plot/uiputfile.m, scripts/plot/waterfall.m, scripts/plot/whitebg.m,
scripts/plot/xlim.m, scripts/plot/ylim.m, scripts/plot/zlim.m,
scripts/polynomial/conv.m, scripts/polynomial/polyout.m,
scripts/polynomial/splinefit.m, scripts/set/ismember.m, scripts/set/powerset.m,
scripts/set/setdiff.m, scripts/set/union.m, scripts/set/unique.m,
scripts/signal/detrend.m, scripts/signal/filter2.m, scripts/signal/freqz.m,
scripts/signal/periodogram.m, scripts/signal/spectral_adf.m,
scripts/signal/spectral_xdf.m, scripts/sparse/eigs.m, scripts/sparse/svds.m,
scripts/specfun/legendre.m, scripts/special-matrix/gallery.m,
scripts/statistics/base/mean.m, scripts/statistics/base/moment.m,
scripts/statistics/tests/cor_test.m,
scripts/statistics/tests/kolmogorov_smirnov_test.m,
scripts/statistics/tests/kolmogorov_smirnov_test_2.m,
scripts/statistics/tests/kruskal_wallis_test.m,
scripts/statistics/tests/prop_test_2.m, scripts/statistics/tests/sign_test.m,
scripts/statistics/tests/t_test.m, scripts/statistics/tests/t_test_2.m,
scripts/statistics/tests/t_test_regression.m,
scripts/statistics/tests/u_test.m, scripts/statistics/tests/var_test.m,
scripts/statistics/tests/welch_test.m,
scripts/statistics/tests/wilcoxon_test.m, scripts/statistics/tests/z_test.m,
scripts/statistics/tests/z_test_2.m, scripts/strings/base2dec.m,
scripts/strings/index.m, scripts/strings/isstrprop.m,
scripts/strings/mat2str.m, scripts/strings/regexptranslate.m,
scripts/strings/rindex.m, scripts/strings/str2num.m, scripts/strings/strcat.m,
scripts/strings/strjust.m, scripts/strings/strmatch.m,
scripts/strings/validatestring.m, scripts/testfun/demo.m,
scripts/testfun/example.m, scripts/testfun/test.m, scripts/time/addtodate.m,
scripts/time/asctime.m, scripts/time/datestr.m, scripts/time/datetick.m,
scripts/time/weekday.m, scripts/ui/errordlg.m, scripts/ui/helpdlg.m,
scripts/ui/inputdlg.m, scripts/ui/listdlg.m, scripts/ui/msgbox.m,
scripts/ui/questdlg.m, scripts/ui/warndlg.m: Use new @qcode macro.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 19 Aug 2013 20:46:38 -0700 |
parents | f010db8b710c |
children | d63878346099 |
line wrap: on
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/* Copyright (C) 2008-2012 David Bateman 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 <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <algorithm> #include "defun.h" #include "error.h" #include "gripes.h" #include "oct-obj.h" #include "utils.h" DEFUN (hex2num, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {@var{n} =} hex2num (@var{s})\n\ @deftypefnx {Built-in Function} {@var{n} =} hex2num (@var{s}, @var{class})\n\ Typecast the 16 character hexadecimal character string to an IEEE 754\n\ double precision number. If fewer than 16 characters are given the\n\ strings are right padded with @qcode{'0'} characters.\n\ \n\ Given a string matrix, @code{hex2num} treats each row as a separate\n\ number.\n\ \n\ @example\n\ @group\n\ hex2num ([\"4005bf0a8b145769\"; \"4024000000000000\"])\n\ @result{} [2.7183; 10.000]\n\ @end group\n\ @end example\n\ \n\ The optional argument @var{class} can be passed as the string\n\ @qcode{\"single\"} to specify that the given string should be interpreted as\n\ a single precision number. In this case, @var{s} should be an 8 character\n\ hexadecimal string. For example: \n\ \n\ @example\n\ @group\n\ hex2num ([\"402df854\"; \"41200000\"], \"single\")\n\ @result{} [2.7183; 10.000]\n\ @end group\n\ @end example\n\ @seealso{num2hex, hex2dec, dec2hex}\n\ @end deftypefn") { int nargin = args.length (); octave_value retval; if (nargin < 1 || nargin > 2) print_usage (); else if (nargin == 2 && ! args(1).is_string ()) error ("hex2num: CLASS must be a string"); else { const charMatrix cmat = args(0).char_matrix_value (); std::string prec = (nargin == 2) ? args(1).string_value () : "double"; bool is_single = (prec == "single"); octave_idx_type nchars = (is_single) ? 8 : 16; if (cmat.columns () > nchars) error ("hex2num: S must be no more than %d characters", nchars); else if (prec != "double" && prec != "single") error ("hex2num: CLASS must be either \"double\" or \"single\""); else if (! error_state) { octave_idx_type nr = cmat.rows (); octave_idx_type nc = cmat.columns (); if (is_single) { FloatColumnVector m (nr); for (octave_idx_type i = 0; i < nr; i++) { union { uint32_t ival; float dval; } num; num.ival = 0; for (octave_idx_type j = 0; j < nc; j++) { unsigned char ch = cmat.elem (i, j); if (isxdigit (ch)) { num.ival <<= 4; if (ch >= 'a') num.ival += static_cast<uint32_t> (ch - 'a' + 10); else if (ch >= 'A') num.ival += static_cast<uint32_t> (ch - 'A' + 10); else num.ival += static_cast<uint32_t> (ch - '0'); } else { error ("hex2num: illegal character found in string S"); break; } } if (error_state) break; else { if (nc < nchars) num.ival <<= (nchars - nc) * 4; m(i) = num.dval; } } if (! error_state) retval = m; } else { ColumnVector m (nr); for (octave_idx_type i = 0; i < nr; i++) { union { uint64_t ival; double dval; } num; num.ival = 0; for (octave_idx_type j = 0; j < nc; j++) { unsigned char ch = cmat.elem (i, j); if (isxdigit (ch)) { num.ival <<= 4; if (ch >= 'a') num.ival += static_cast<uint64_t> (ch - 'a' + 10); else if (ch >= 'A') num.ival += static_cast<uint64_t> (ch - 'A' + 10); else num.ival += static_cast<uint64_t> (ch - '0'); } else { error ("hex2num: illegal character found in string S"); break; } } if (error_state) break; else { if (nc < nchars) num.ival <<= (nchars - nc) * 4; m(i) = num.dval; } } if (! error_state) retval = m; } } } return retval; } /* %!assert (hex2num (["c00";"bff";"000";"3ff";"400"]), [-2:2]') %!assert (hex2num (["c00";"bf8";"000";"3f8";"400"], "single"), single([-2:2])') */ DEFUN (num2hex, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {@var{s} =} num2hex (@var{n})\n\ Typecast a double or single precision number or vector to a 8 or 16\n\ character hexadecimal string of the IEEE 754 representation of the number.\n\ For example:\n\ \n\ @example\n\ @group\n\ num2hex ([-1, 1, e, Inf])\n\ @result{} \"bff0000000000000\n\ 3ff0000000000000\n\ 4005bf0a8b145769\n\ 7ff0000000000000\"\n\ @end group\n\ @end example\n\ \n\ If the argument @var{n} is a single precision number or vector, the returned\n\ string has a length of 8. For example:\n\ \n\ @example\n\ @group\n\ num2hex (single ([-1, 1, e, Inf]))\n\ @result{} \"bf800000\n\ 3f800000\n\ 402df854\n\ 7f800000\"\n\ @end group\n\ @end example\n\ @seealso{hex2num, hex2dec, dec2hex}\n\ @end deftypefn") { int nargin = args.length (); octave_value retval; if (nargin != 1) print_usage (); else if (args(0).is_single_type ()) { const FloatColumnVector v (args(0).float_vector_value ()); if (! error_state) { octave_idx_type nchars = 8; octave_idx_type nr = v.length (); charMatrix m (nr, nchars); const float *pv = v.fortran_vec (); for (octave_idx_type i = 0; i < nr; i++) { union { uint32_t ival; float dval; } num; num.dval = *pv++; for (octave_idx_type j = 0; j < nchars; j++) { unsigned char ch = static_cast<char> (num.ival >> ((nchars - 1 - j) * 4) & 0xF); if (ch >= 10) ch += 'a' - 10; else ch += '0'; m.elem (i, j) = ch; } } retval = m; } } else { const ColumnVector v (args(0).vector_value ()); if (! error_state) { octave_idx_type nchars = 16; octave_idx_type nr = v.length (); charMatrix m (nr, nchars); const double *pv = v.fortran_vec (); for (octave_idx_type i = 0; i < nr; i++) { union { uint64_t ival; double dval; } num; num.dval = *pv++; for (octave_idx_type j = 0; j < nchars; j++) { unsigned char ch = static_cast<char> (num.ival >> ((nchars - 1 - j) * 4) & 0xF); if (ch >= 10) ch += 'a' - 10; else ch += '0'; m.elem (i, j) = ch; } } retval = m; } } return retval; } /* %!assert (num2hex (-2:2), ["c000000000000000";"bff0000000000000";"0000000000000000";"3ff0000000000000";"4000000000000000"]) %!assert (num2hex (single (-2:2)), ["c0000000";"bf800000";"00000000";"3f800000";"40000000"]) */