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annotate libinterp/corefcn/hex2num.cc @ 21724:aba2e6293dd8

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use "#if ..." consistently instead of "#ifdef" and "#ifndef" * configure.ac, Doxyfile.in, make_int.cc, Backend.cc, BaseControl.cc, ButtonControl.cc, Canvas.cc, CheckBoxControl.cc, Container.cc, ContextMenu.cc, EditControl.cc, Figure.cc, FigureWindow.cc, GLCanvas.cc, KeyMap.cc, ListBoxControl.cc, Logger.cc, Menu.cc, MouseModeActionGroup.cc, Object.cc, ObjectFactory.cc, ObjectProxy.cc, Panel.cc, PopupMenuControl.cc, PushButtonControl.cc, PushTool.cc, QtHandlesUtils.cc, RadioButtonControl.cc, SliderControl.cc, TextControl.cc, TextEdit.cc, ToggleButtonControl.cc, ToggleTool.cc, ToolBar.cc, __init_qt__.cc, annotation-dialog.cc, gl-select.cc, module.mk, color-picker.cc, dialog.cc, documentation-dock-widget.cc, files-dock-widget.cc, find-files-dialog.cc, find-files-model.cc, history-dock-widget.cc, liboctgui-build-info.in.cc, file-editor-tab.cc, file-editor.cc, find-dialog.cc, marker.cc, marker.h, octave-qscintilla.cc, octave-txt-lexer.cc, main-window.cc, octave-cmd.cc, octave-dock-widget.cc, octave-gui.cc, octave-interpreter.cc, octave-qt-link.cc, parser.cc, webinfo.cc, resource-manager.cc, settings-dialog.cc, shortcut-manager.cc, terminal-dock-widget.cc, thread-manager.cc, welcome-wizard.cc, workspace-model.cc, workspace-view.cc, build-env.in.cc, Cell.cc, __contourc__.cc, __dispatch__.cc, __dsearchn__.cc, __ichol__.cc, __ilu__.cc, __lin_interpn__.cc, __luinc__.cc, __magick_read__.cc, __pchip_deriv__.cc, __qp__.cc, balance.cc, besselj.cc, betainc.cc, bitfcns.cc, bsxfun.cc, c-file-ptr-stream.cc, c-file-ptr-stream.h, cdisplay.c, cdisplay.h, cellfun.cc, coct-hdf5-types.c, colloc.cc, comment-list.cc, conv2.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, debug.cc, defaults.cc, defaults.in.h, defun.cc, det.cc, dirfns.cc, display.cc, dlmread.cc, dot.cc, dynamic-ld.cc, eig.cc, ellipj.cc, error.cc, errwarn.cc, event-queue.cc, fft.cc, fft2.cc, fftn.cc, file-io.cc, filter.cc, find.cc, ft-text-renderer.cc, gammainc.cc, gcd.cc, getgrent.cc, getpwent.cc, getrusage.cc, givens.cc, gl-render.cc, gl2ps-print.cc, graphics.cc, gripes.cc, hash.cc, help.cc, hess.cc, hex2num.cc, input.cc, inv.cc, jit-ir.cc, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.cc, jit-util.h, kron.cc, load-path.cc, load-save.cc, lookup.cc, ls-ascii-helper.cc, ls-hdf5.cc, ls-mat-ascii.cc, ls-mat4.cc, ls-mat5.cc, ls-oct-binary.cc, ls-oct-text.cc, ls-oct-text.h, ls-utils.cc, lsode.cc, lu.cc, mappers.cc, matrix_type.cc, max.cc, mex.cc, mex.h, mexproto.h, mgorth.cc, nproc.cc, oct-errno.in.cc, oct-fstrm.cc, oct-hdf5-types.cc, oct-hdf5-types.h, oct-hist.cc, oct-iostrm.cc, oct-lvalue.cc, oct-map.cc, oct-prcstrm.cc, oct-procbuf.cc, oct-stdstrm.h, oct-stream.cc, oct-strstrm.cc, oct-tex-lexer.in.ll, oct-tex-parser.in.yy, octave-link.cc, ordschur.cc, pager.cc, pinv.cc, pr-output.cc, procstream.cc, profiler.cc, psi.cc, pt-jit.cc, pt-jit.h, quad.cc, quadcc.cc, qz.cc, rand.cc, rcond.cc, regexp.cc, schur.cc, sighandlers.cc, sighandlers.h, siglist.c, siglist.h, sparse-xdiv.cc, sparse-xpow.cc, sparse.cc, spparms.cc, sqrtm.cc, str2double.cc, strfind.cc, strfns.cc, sub2ind.cc, svd.cc, sylvester.cc, symtab.cc, syscalls.cc, sysdep.cc, text-renderer.cc, time.cc, toplev.cc, tril.cc, tsearch.cc, txt-eng.cc, typecast.cc, urlwrite.cc, utils.cc, variables.cc, xdiv.cc, xgl2ps.c, xnorm.cc, xpow.cc, zfstream.cc, zfstream.h, __delaunayn__.cc, __eigs__.cc, __fltk_uigetfile__.cc, __glpk__.cc, __init_fltk__.cc, __init_gnuplot__.cc, __osmesa_print__.cc, __voronoi__.cc, amd.cc, audiodevinfo.cc, audioread.cc, ccolamd.cc, chol.cc, colamd.cc, convhulln.cc, dmperm.cc, fftw.cc, qr.cc, symbfact.cc, symrcm.cc, liboctinterp-build-info.in.cc, mkbuiltins, mkops, ov-base.cc, ov-bool-mat.cc, ov-bool-sparse.cc, ov-bool.cc, ov-builtin.cc, ov-cell.cc, ov-ch-mat.cc, ov-class.cc, ov-classdef.cc, ov-colon.cc, ov-complex.cc, ov-cs-list.cc, ov-cx-diag.cc, ov-cx-mat.cc, ov-cx-sparse.cc, ov-dld-fcn.cc, ov-fcn-handle.cc, ov-fcn-inline.cc, ov-fcn.cc, ov-float.cc, ov-flt-complex.cc, ov-flt-cx-diag.cc, ov-flt-cx-mat.cc, ov-flt-re-diag.cc, ov-flt-re-mat.cc, ov-int16.cc, ov-int32.cc, ov-int64.cc, ov-int8.cc, ov-java.cc, ov-lazy-idx.cc, ov-mex-fcn.cc, ov-null-mat.cc, ov-oncleanup.cc, ov-perm.cc, ov-range.cc, ov-re-diag.cc, ov-re-mat.cc, ov-re-sparse.cc, ov-scalar.cc, ov-str-mat.cc, ov-struct.cc, ov-typeinfo.cc, ov-uint16.cc, ov-uint32.cc, ov-uint64.cc, ov-uint8.cc, ov-usr-fcn.cc, ov-usr-fcn.h, ov.cc, ovl.cc, octave.cc, octave.h, op-b-b.cc, op-b-bm.cc, op-b-sbm.cc, op-bm-b.cc, op-bm-bm.cc, op-bm-sbm.cc, op-cdm-cdm.cc, op-cdm-cm.cc, op-cdm-dm.cc, op-cdm-m.cc, op-cell.cc, op-chm.cc, op-class.cc, op-cm-cdm.cc, op-cm-cm.cc, op-cm-cs.cc, op-cm-dm.cc, op-cm-m.cc, op-cm-s.cc, op-cm-scm.cc, op-cm-sm.cc, op-cs-cm.cc, op-cs-cs.cc, op-cs-m.cc, op-cs-s.cc, op-cs-scm.cc, op-cs-sm.cc, op-dm-cdm.cc, op-dm-cm.cc, op-dm-dm.cc, op-dm-m.cc, op-dm-scm.cc, op-dm-sm.cc, op-dm-template.cc, op-dms-template.cc, op-double-conv.cc, op-fcdm-fcdm.cc, op-fcdm-fcm.cc, op-fcdm-fdm.cc, op-fcdm-fm.cc, op-fcm-fcdm.cc, op-fcm-fcm.cc, op-fcm-fcs.cc, op-fcm-fdm.cc, op-fcm-fm.cc, op-fcm-fs.cc, op-fcn.cc, op-fcs-fcm.cc, op-fcs-fcs.cc, op-fcs-fm.cc, op-fcs-fs.cc, op-fdm-fcdm.cc, op-fdm-fcm.cc, op-fdm-fdm.cc, op-fdm-fm.cc, op-float-conv.cc, op-fm-fcdm.cc, op-fm-fcm.cc, op-fm-fcs.cc, op-fm-fdm.cc, op-fm-fm.cc, op-fm-fs.cc, op-fs-fcm.cc, op-fs-fcs.cc, op-fs-fm.cc, op-fs-fs.cc, op-i16-i16.cc, op-i32-i32.cc, op-i64-i64.cc, op-i8-i8.cc, op-int-concat.cc, op-int-conv.cc, op-m-cdm.cc, op-m-cm.cc, op-m-cs.cc, op-m-dm.cc, op-m-m.cc, op-m-s.cc, op-m-scm.cc, op-m-sm.cc, op-pm-pm.cc, op-pm-scm.cc, op-pm-sm.cc, op-pm-template.cc, op-range.cc, op-s-cm.cc, op-s-cs.cc, op-s-m.cc, op-s-s.cc, op-s-scm.cc, op-s-sm.cc, op-sbm-b.cc, op-sbm-bm.cc, op-sbm-sbm.cc, op-scm-cm.cc, op-scm-cs.cc, op-scm-m.cc, op-scm-s.cc, op-scm-scm.cc, op-scm-sm.cc, op-sm-cm.cc, op-sm-cs.cc, op-sm-m.cc, op-sm-s.cc, op-sm-scm.cc, op-sm-sm.cc, op-str-m.cc, op-str-s.cc, op-str-str.cc, op-struct.cc, op-ui16-ui16.cc, op-ui32-ui32.cc, op-ui64-ui64.cc, op-ui8-ui8.cc, lex.ll, oct-parse.in.yy, pt-arg-list.cc, pt-array-list.cc, pt-assign.cc, pt-binop.cc, pt-bp.cc, pt-cbinop.cc, pt-cell.cc, pt-check.cc, pt-classdef.cc, pt-cmd.cc, pt-colon.cc, pt-const.cc, pt-decl.cc, pt-eval.cc, pt-except.cc, pt-exp.cc, pt-fcn-handle.cc, pt-funcall.cc, pt-id.cc, pt-idx.cc, pt-jump.cc, pt-loop.cc, pt-loop.h, pt-mat.cc, pt-misc.cc, pt-pr-code.cc, pt-select.cc, pt-stmt.cc, pt-unop.cc, pt.cc, token.cc, Array-jit.cc, Array-tc.cc, version.cc, Array-C.cc, Array-b.cc, Array-ch.cc, Array-d.cc, Array-f.cc, Array-fC.cc, Array-i.cc, Array-idx-vec.cc, Array-s.cc, Array-str.cc, Array-util.cc, Array-voidp.cc, Array.cc, CColVector.cc, CDiagMatrix.cc, CMatrix.cc, CNDArray.cc, CRowVector.cc, CSparse.cc, MArray-C.cc, MArray-d.cc, MArray-f.cc, MArray-fC.cc, MArray-i.cc, MArray-s.cc, MSparse-C.cc, MSparse-d.cc, MatrixType.cc, PermMatrix.cc, Range.cc, Sparse-C.cc, Sparse-b.cc, Sparse-d.cc, boolMatrix.cc, boolNDArray.cc, boolSparse.cc, chMatrix.cc, chNDArray.cc, dColVector.cc, dDiagMatrix.cc, dMatrix.cc, dNDArray.cc, dRowVector.cc, dSparse.cc, dim-vector.cc, dim-vector.h, fCColVector.cc, fCDiagMatrix.cc, fCMatrix.cc, fCNDArray.cc, fCRowVector.cc, fColVector.cc, fDiagMatrix.cc, fMatrix.cc, fNDArray.cc, fRowVector.cc, idx-vector.cc, int16NDArray.cc, int32NDArray.cc, int64NDArray.cc, int8NDArray.cc, uint16NDArray.cc, uint32NDArray.cc, uint64NDArray.cc, uint8NDArray.cc, Faddeeva.cc, blaswrap.c, cquit.c, f77-extern.cc, f77-fcn.c, f77-fcn.h, lo-error.c, lo-error.h, quit.cc, quit.h, liboctave-build-info.in.cc, CollocWt.cc, DASPK.cc, DASRT.cc, DASSL.cc, EIG.cc, LSODE.cc, ODES.cc, Quad.cc, aepbalance.cc, chol.cc, eigs-base.cc, fEIG.cc, gepbalance.cc, hess.cc, lo-mappers.cc, lo-specfun.cc, lu.cc, oct-convn.cc, oct-fftw.cc, oct-norm.cc, oct-rand.cc, oct-spparms.cc, qr.cc, qrp.cc, randmtzig.cc, randpoisson.cc, schur.cc, sparse-chol.cc, sparse-dmsolve.cc, sparse-lu.cc, sparse-qr.cc, svd.cc, mk-ops.awk, mx-defs.h, dir-ops.cc, file-ops.cc, file-stat.cc, lo-sysdep.cc, mach-info.cc, oct-env.cc, oct-group.cc, oct-passwd.cc, oct-syscalls.cc, oct-time.cc, oct-uname.cc, pathlen.h, syswait.h, cmd-edit.cc, cmd-hist.cc, data-conv.cc, f2c-main.c, glob-match.cc, kpse.cc, lo-array-errwarn.cc, lo-array-gripes.cc, lo-cutils.c, lo-cutils.h, lo-ieee.cc, lo-ieee.h, lo-regexp.cc, lo-utils.cc, oct-base64.cc, oct-glob.cc, oct-inttypes.cc, oct-inttypes.h, oct-locbuf.cc, oct-mutex.cc, oct-rl-edit.c, oct-rl-edit.h, oct-rl-hist.c, oct-rl-hist.h, oct-shlib.cc, oct-sort.cc, pathsearch.cc, singleton-cleanup.cc, sparse-sort.cc, sparse-util.cc, statdefs.h, str-vec.cc, unwind-prot.cc, url-transfer.cc, acinclude.m4, display-available.c, display-available.h, main-cli.cc, main-gui.cc, main.in.cc, mkoctfile.in.cc, octave-build-info.in.cc, octave-config.in.cc, shared-fcns.h: Use "#if ..." consistently instead of "#ifdef" and "#ifndef".
author John W. Eaton <jwe@octave.org>
date Tue, 17 May 2016 12:09:30 -0400
parents 3d60ed163b70
children 6b4f6339df91
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1 /*
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2
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3 Copyright (C) 2008-2015 David Bateman
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if defined (HAVE_CONFIG_H)
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24 # include "config.h"
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25 #endif
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26
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27 #include <algorithm>
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28
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29 #include "defun.h"
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30 #include "error.h"
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31 #include "errwarn.h"
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32 #include "ovl.h"
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33 #include "utils.h"
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34
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35 DEFUN (hex2num, args, ,
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36 "-*- texinfo -*-\n\
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37 @deftypefn {} {@var{n} =} hex2num (@var{s})\n\
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38 @deftypefnx {} {@var{n} =} hex2num (@var{s}, @var{class})\n\
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39 Typecast the 16 character hexadecimal character string to an IEEE 754\n\
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40 double precision number.\n\
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41 \n\
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42 If fewer than 16 characters are given the strings are right padded with\n\
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43 @qcode{'0'} characters.\n\
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44 \n\
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45 Given a string matrix, @code{hex2num} treats each row as a separate number.\n\
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46 \n\
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47 @example\n\
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48 @group\n\
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49 hex2num ([\"4005bf0a8b145769\"; \"4024000000000000\"])\n\
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50 @result{} [2.7183; 10.000]\n\
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51 @end group\n\
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52 @end example\n\
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53 \n\
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54 The optional argument @var{class} can be passed as the string\n\
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55 @qcode{\"single\"} to specify that the given string should be interpreted as\n\
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56 a single precision number. In this case, @var{s} should be an 8 character\n\
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57 hexadecimal string. For example:\n\
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58 \n\
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59 @example\n\
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60 @group\n\
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61 hex2num ([\"402df854\"; \"41200000\"], \"single\")\n\
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62 @result{} [2.7183; 10.000]\n\
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63 @end group\n\
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64 @end example\n\
7639
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diff changeset
65 @seealso{num2hex, hex2dec, dec2hex}\n\
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parents:
diff changeset
66 @end deftypefn")
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David Bateman <dbateman@free.fr>
parents:
diff changeset
67 {
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David Bateman <dbateman@free.fr>
parents:
diff changeset
68 int nargin = args.length ();
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69
17178
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Mike Miller <mtmiller@ieee.org>
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diff changeset
70 if (nargin < 1 || nargin > 2)
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71 print_usage ();
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8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20678
diff changeset
72
8bb38ba1bad6 eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20678
diff changeset
73 if (nargin == 2 && ! args(1).is_string ())
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Mike Miller <mtmiller@ieee.org>
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diff changeset
74 error ("hex2num: CLASS must be a string");
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diff changeset
75
b17fda023ca6 maint: Use new C++ archetype in more files.
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76 const charMatrix cmat = args(0).char_matrix_value ();
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77 std::string prec = (nargin == 2) ? args(1).string_value () : "double";
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diff changeset
78 bool is_single = (prec == "single");
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diff changeset
79 octave_idx_type nchars = (is_single) ? 8 : 16;
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80
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diff changeset
81 if (cmat.columns () > nchars)
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diff changeset
82 error ("hex2num: S must be no more than %d characters", nchars);
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diff changeset
83 else if (prec != "double" && prec != "single")
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diff changeset
84 error ("hex2num: CLASS must be either \"double\" or \"single\"");
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85
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diff changeset
86 octave_value retval;
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diff changeset
87 octave_idx_type nr = cmat.rows ();
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diff changeset
88 octave_idx_type nc = cmat.columns ();
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diff changeset
89
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diff changeset
90 if (is_single)
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91 {
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92 FloatColumnVector m (nr);
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93
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94 for (octave_idx_type i = 0; i < nr; i++)
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95 {
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96 union
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97 {
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98 uint32_t ival;
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99 float dval;
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100 } num;
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101
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102 num.ival = 0;
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103
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104 for (octave_idx_type j = 0; j < nc; j++)
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105 {
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diff changeset
106 unsigned char ch = cmat.elem (i, j);
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107
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108 if (! isxdigit (ch))
3aa293be0e8d maint: Invert simple conditionals in if/else/error paradigm.
Rik <rik@octave.org>
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diff changeset
109 error ("hex2num: illegal character found in string S");
3aa293be0e8d maint: Invert simple conditionals in if/else/error paradigm.
Rik <rik@octave.org>
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diff changeset
110
3aa293be0e8d maint: Invert simple conditionals in if/else/error paradigm.
Rik <rik@octave.org>
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diff changeset
111 num.ival <<= 4;
3aa293be0e8d maint: Invert simple conditionals in if/else/error paradigm.
Rik <rik@octave.org>
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112 if (ch >= 'a')
3aa293be0e8d maint: Invert simple conditionals in if/else/error paradigm.
Rik <rik@octave.org>
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diff changeset
113 num.ival += static_cast<uint32_t> (ch - 'a' + 10);
3aa293be0e8d maint: Invert simple conditionals in if/else/error paradigm.
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114 else if (ch >= 'A')
3aa293be0e8d maint: Invert simple conditionals in if/else/error paradigm.
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diff changeset
115 num.ival += static_cast<uint32_t> (ch - 'A' + 10);
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116 else
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117 num.ival += static_cast<uint32_t> (ch - '0');
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118 }
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119
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120 if (nc < nchars)
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121 num.ival <<= (nchars - nc) * 4;
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122
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123 m(i) = num.dval;
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124 }
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125
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126 retval = m;
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127 }
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128 else
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129 {
20939
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diff changeset
130 ColumnVector m (nr);
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131
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132 for (octave_idx_type i = 0; i < nr; i++)
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133 {
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134 union
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135 {
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diff changeset
136 uint64_t ival;
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137 double dval;
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138 } num;
13222
82f3a0c27569 fix warnings for uninitialized variables
John W. Eaton <jwe@octave.org>
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diff changeset
139
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140 num.ival = 0;
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141
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142 for (octave_idx_type j = 0; j < nc; j++)
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143 {
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144 unsigned char ch = cmat.elem (i, j);
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145
20962
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Rik <rik@octave.org>
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diff changeset
146 if (! isxdigit (ch))
3aa293be0e8d maint: Invert simple conditionals in if/else/error paradigm.
Rik <rik@octave.org>
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diff changeset
147 error ("hex2num: illegal character found in string S");
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Rik <rik@octave.org>
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148
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Rik <rik@octave.org>
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149 num.ival <<= 4;
3aa293be0e8d maint: Invert simple conditionals in if/else/error paradigm.
Rik <rik@octave.org>
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diff changeset
150 if (ch >= 'a')
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Rik <rik@octave.org>
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diff changeset
151 num.ival += static_cast<uint64_t> (ch - 'a' + 10);
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Rik <rik@octave.org>
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diff changeset
152 else if (ch >= 'A')
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Rik <rik@octave.org>
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diff changeset
153 num.ival += static_cast<uint64_t> (ch - 'A' + 10);
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154 else
20962
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diff changeset
155 num.ival += static_cast<uint64_t> (ch - '0');
17178
f010db8b710c hex2num: Add single precision conversion option (bug #39608)
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156 }
7639
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157
20939
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diff changeset
158 if (nc < nchars)
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diff changeset
159 num.ival <<= (nchars - nc) * 4;
17178
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diff changeset
160
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diff changeset
161 m(i) = num.dval;
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162 }
17178
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Mike Miller <mtmiller@ieee.org>
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diff changeset
163
21568
3d60ed163b70 maint: Eliminate bad spacing around '='.
Rik <rik@octave.org>
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164 retval = m;
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165 }
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166
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167 return retval;
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168 }
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169
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David Bateman <dbateman@free.fr>
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170 /*
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
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171 %!assert (hex2num (["c00";"bff";"000";"3ff";"400"]), [-2:2]')
17178
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diff changeset
172 %!assert (hex2num (["c00";"bf8";"000";"3f8";"400"], "single"), single([-2:2])')
8808
d724487d2c4b hex2num.cc: use union to avoid cast and GCC warning
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parents: 8807
diff changeset
173 */
7639
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174
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14501
diff changeset
175 DEFUN (num2hex, args, ,
17787
175b392e91fe Use GNU style coding conventions for code in libinterp/
Rik <rik@octave.org>
parents: 17744
diff changeset
176 "-*- texinfo -*-\n\
20853
1142cf6abc0d 2015 Code Sprint: remove class of function from docstring for all C++ files.
Rik <rik@octave.org>
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diff changeset
177 @deftypefn {} {@var{s} =} num2hex (@var{n})\n\
17177
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diff changeset
178 Typecast a double or single precision number or vector to a 8 or 16\n\
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diff changeset
179 character hexadecimal string of the IEEE 754 representation of the number.\n\
20172
4f45eaf83908 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
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diff changeset
180 \n\
17177
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diff changeset
181 For example:\n\
7639
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182 \n\
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David Bateman <dbateman@free.fr>
parents:
diff changeset
183 @example\n\
9064
7c02ec148a3c Check grammar on all .cc files
Rik <rdrider0-list@yahoo.com>
parents: 9036
diff changeset
184 @group\n\
17177
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diff changeset
185 num2hex ([-1, 1, e, Inf])\n\
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diff changeset
186 @result{} \"bff0000000000000\n\
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187 3ff0000000000000\n\
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188 4005bf0a8b145769\n\
17177
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Mike Miller <mtmiller@ieee.org>
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diff changeset
189 7ff0000000000000\"\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
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diff changeset
190 @end group\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
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diff changeset
191 @end example\n\
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Mike Miller <mtmiller@ieee.org>
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diff changeset
192 \n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
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diff changeset
193 If the argument @var{n} is a single precision number or vector, the returned\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
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diff changeset
194 string has a length of 8. For example:\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
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diff changeset
195 \n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
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diff changeset
196 @example\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
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diff changeset
197 @group\n\
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198 num2hex (single ([-1, 1, e, Inf]))\n\
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diff changeset
199 @result{} \"bf800000\n\
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200 3f800000\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
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diff changeset
201 402df854\n\
81d3c4409645 num2hex: Handle single precision argument correctly (bug #39607)
Mike Miller <mtmiller@ieee.org>
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diff changeset
202 7f800000\"\n\
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Rik <rdrider0-list@yahoo.com>
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diff changeset
203 @end group\n\
7639
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204 @end example\n\
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205 @seealso{hex2num, hex2dec, dec2hex}\n\
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parents:
diff changeset
206 @end deftypefn")
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207 {
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208 if (args.length () != 1)
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209 print_usage ();
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210
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211 octave_value retval;
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212
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213 if (args(0).is_single_type ())
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214 {
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215 const FloatColumnVector v (args(0).float_vector_value ());
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216
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217 octave_idx_type nchars = 8;
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218 octave_idx_type nr = v.numel ();
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219 charMatrix m (nr, nchars);
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220 const float *pv = v.fortran_vec ();
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221
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222 for (octave_idx_type i = 0; i < nr; i++)
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223 {
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224 union
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225 {
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226 uint32_t ival;
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227 float dval;
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228 } num;
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229
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230 num.dval = *pv++;
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231
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232 for (octave_idx_type j = 0; j < nchars; j++)
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233 {
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234 unsigned char ch =
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235 static_cast<char>(num.ival >> ((nchars - 1 - j) * 4) & 0xF);
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236 if (ch >= 10)
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237 ch += 'a' - 10;
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238 else
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239 ch += '0';
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240
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241 m.elem (i, j) = ch;
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242 }
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243 }
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244
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245 retval = m;
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246 }
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247 else
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248 {
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249 const ColumnVector v (args(0).vector_value ());
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250
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251 octave_idx_type nchars = 16;
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252 octave_idx_type nr = v.numel ();
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253 charMatrix m (nr, nchars);
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254 const double *pv = v.fortran_vec ();
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255
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256 for (octave_idx_type i = 0; i < nr; i++)
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257 {
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258 union
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259 {
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260 uint64_t ival;
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261 double dval;
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262 } num;
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263
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264 num.dval = *pv++;
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265
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266 for (octave_idx_type j = 0; j < nchars; j++)
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267 {
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268 unsigned char ch =
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269 static_cast<char>(num.ival >> ((nchars - 1 - j) * 4) & 0xF);
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270 if (ch >= 10)
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271 ch += 'a' - 10;
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272 else
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273 ch += '0';
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274
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275 m.elem (i, j) = ch;
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276 }
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277 }
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278
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279 retval = m;
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280 }
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281
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282 return retval;
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283 }
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284
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285 /*
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286 %!assert (num2hex (-2:2), ["c000000000000000";"bff0000000000000";"0000000000000000";"3ff0000000000000";"4000000000000000"])
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287 %!assert (num2hex (single (-2:2)), ["c0000000";"bf800000";"00000000";"3f800000";"40000000"])
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288 */