Mercurial > octave
view liboctave/numeric/oct-rand.cc @ 31605:e88a07dec498 stable
maint: Use macros to begin/end C++ namespaces.
* oct-conf-post-public.in.h: Define two macros (OCTAVE_BEGIN_NAMESPACE,
OCTAVE_END_NAMESPACE) that can be used to start/end a namespace.
* mk-opts.pl, build-env.h, build-env.in.cc, __betainc__.cc, __contourc__.cc,
__dsearchn__.cc, __eigs__.cc, __expint__.cc, __ftp__.cc, __gammainc__.cc,
__ichol__.cc, __ilu__.cc, __isprimelarge__.cc, __lin_interpn__.cc,
__magick_read__.cc, __pchip_deriv__.cc, __qp__.cc, amd.cc, auto-shlib.cc,
auto-shlib.h, balance.cc, base-text-renderer.cc, base-text-renderer.h,
besselj.cc, bitfcns.cc, bsxfun.cc, c-file-ptr-stream.cc, c-file-ptr-stream.h,
call-stack.cc, call-stack.h, ccolamd.cc, cellfun.cc, chol.cc, colamd.cc,
colloc.cc, conv2.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, data.h, debug.cc,
defaults.cc, defaults.h, defun-int.h, defun.cc, det.cc, dirfns.cc, display.cc,
display.h, dlmread.cc, dmperm.cc, dot.cc, dynamic-ld.cc, dynamic-ld.h, eig.cc,
ellipj.cc, environment.cc, environment.h, error.cc, error.h, errwarn.h,
event-manager.cc, event-manager.h, event-queue.cc, event-queue.h, fcn-info.cc,
fcn-info.h, fft.cc, fft2.cc, fftn.cc, file-io.cc, filter.cc, find.cc,
ft-text-renderer.cc, ft-text-renderer.h, gcd.cc, getgrent.cc, getpwent.cc,
getrusage.cc, givens.cc, gl-render.cc, gl-render.h, gl2ps-print.cc,
gl2ps-print.h, graphics-toolkit.cc, graphics-toolkit.h, graphics.cc,
graphics.in.h, gsvd.cc, gtk-manager.cc, gtk-manager.h, hash.cc, help.cc,
help.h, hess.cc, hex2num.cc, hook-fcn.cc, hook-fcn.h, input.cc, input.h,
interpreter-private.cc, interpreter-private.h, interpreter.cc, interpreter.h,
inv.cc, jsondecode.cc, jsonencode.cc, kron.cc, latex-text-renderer.cc,
latex-text-renderer.h, load-path.cc, load-path.h, load-save.cc, load-save.h,
lookup.cc, ls-ascii-helper.cc, ls-ascii-helper.h, ls-oct-text.cc, ls-utils.cc,
ls-utils.h, lsode.cc, lu.cc, mappers.cc, matrix_type.cc, max.cc, mex-private.h,
mex.cc, mgorth.cc, nproc.cc, oct-fstrm.cc, oct-fstrm.h, oct-hdf5-types.cc,
oct-hdf5-types.h, oct-hist.cc, oct-hist.h, oct-iostrm.cc, oct-iostrm.h,
oct-opengl.h, oct-prcstrm.cc, oct-prcstrm.h, oct-procbuf.cc, oct-procbuf.h,
oct-process.cc, oct-process.h, oct-stdstrm.h, oct-stream.cc, oct-stream.h,
oct-strstrm.cc, oct-strstrm.h, oct-tex-lexer.in.ll, oct-tex-parser.yy,
ordqz.cc, ordschur.cc, pager.cc, pager.h, pinv.cc, pow2.cc, pr-flt-fmt.cc,
pr-output.cc, procstream.cc, procstream.h, psi.cc, qr.cc, quad.cc, quadcc.cc,
qz.cc, rand.cc, rcond.cc, regexp.cc, schur.cc, settings.cc, settings.h,
sighandlers.cc, sighandlers.h, sparse-xdiv.cc, sparse-xdiv.h, sparse-xpow.cc,
sparse-xpow.h, sparse.cc, spparms.cc, sqrtm.cc, stack-frame.cc, stack-frame.h,
stream-euler.cc, strfind.cc, strfns.cc, sub2ind.cc, svd.cc, sylvester.cc,
symbfact.cc, syminfo.cc, syminfo.h, symrcm.cc, symrec.cc, symrec.h,
symscope.cc, symscope.h, symtab.cc, symtab.h, syscalls.cc, sysdep.cc, sysdep.h,
text-engine.cc, text-engine.h, text-renderer.cc, text-renderer.h, time.cc,
toplev.cc, tril.cc, tsearch.cc, typecast.cc, url-handle-manager.cc,
url-handle-manager.h, urlwrite.cc, utils.cc, utils.h, variables.cc,
variables.h, xdiv.cc, xdiv.h, xnorm.cc, xnorm.h, xpow.cc, xpow.h,
__delaunayn__.cc, __fltk_uigetfile__.cc, __glpk__.cc, __init_fltk__.cc,
__init_gnuplot__.cc, __ode15__.cc, __voronoi__.cc, audiodevinfo.cc,
audioread.cc, convhulln.cc, fftw.cc, gzip.cc, mk-build-env-features.sh,
mk-builtins.pl, cdef-class.cc, cdef-class.h, cdef-fwd.h, cdef-manager.cc,
cdef-manager.h, cdef-method.cc, cdef-method.h, cdef-object.cc, cdef-object.h,
cdef-package.cc, cdef-package.h, cdef-property.cc, cdef-property.h,
cdef-utils.cc, cdef-utils.h, ov-base.cc, ov-base.h, ov-bool-mat.cc,
ov-builtin.h, ov-cell.cc, ov-class.cc, ov-class.h, ov-classdef.cc,
ov-classdef.h, ov-complex.cc, ov-fcn-handle.cc, ov-fcn-handle.h, ov-fcn.h,
ov-java.cc, ov-java.h, ov-mex-fcn.h, ov-null-mat.cc, ov-oncleanup.cc,
ov-struct.cc, ov-typeinfo.cc, ov-typeinfo.h, ov-usr-fcn.cc, ov-usr-fcn.h,
ov.cc, ov.h, octave.cc, octave.h, mk-ops.sh, 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-cell.cc,
op-chm.cc, op-class.cc, op-cm-cm.cc, op-cm-cs.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-dm.cc, op-dm-scm.cc, op-dm-sm.cc,
op-dm-template.cc, op-dms-template.cc, op-fcdm-fcdm.cc, op-fcm-fcm.cc,
op-fcm-fcs.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-fdm.cc, op-fm-fcm.cc,
op-fm-fcs.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-m-cm.cc, op-m-cs.cc, op-m-m.cc, op-m-s.cc,
op-m-scm.cc, op-m-sm.cc, op-mi.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, ops.h,
anon-fcn-validator.cc, anon-fcn-validator.h, bp-table.cc, bp-table.h,
comment-list.cc, comment-list.h, filepos.h, lex.h, lex.ll, oct-lvalue.cc,
oct-lvalue.h, oct-parse.yy, parse.h, profiler.cc, profiler.h,
pt-anon-scopes.cc, pt-anon-scopes.h, pt-arg-list.cc, pt-arg-list.h,
pt-args-block.cc, pt-args-block.h, pt-array-list.cc, pt-array-list.h,
pt-assign.cc, pt-assign.h, pt-binop.cc, pt-binop.h, pt-bp.cc, pt-bp.h,
pt-cbinop.cc, pt-cbinop.h, pt-cell.cc, pt-cell.h, pt-check.cc, pt-check.h,
pt-classdef.cc, pt-classdef.h, pt-cmd.h, pt-colon.cc, pt-colon.h, pt-const.cc,
pt-const.h, pt-decl.cc, pt-decl.h, pt-eval.cc, pt-eval.h, pt-except.cc,
pt-except.h, pt-exp.cc, pt-exp.h, pt-fcn-handle.cc, pt-fcn-handle.h, pt-id.cc,
pt-id.h, pt-idx.cc, pt-idx.h, pt-jump.h, pt-loop.cc, pt-loop.h, pt-mat.cc,
pt-mat.h, pt-misc.cc, pt-misc.h, pt-pr-code.cc, pt-pr-code.h, pt-select.cc,
pt-select.h, pt-spmd.cc, pt-spmd.h, pt-stmt.cc, pt-stmt.h, pt-tm-const.cc,
pt-tm-const.h, pt-unop.cc, pt-unop.h, pt-vm-eval.cc, pt-walk.cc, pt-walk.h,
pt.cc, pt.h, token.cc, token.h, Range.cc, Range.h, idx-vector.cc, idx-vector.h,
range-fwd.h, CollocWt.cc, CollocWt.h, aepbalance.cc, aepbalance.h, chol.cc,
chol.h, gepbalance.cc, gepbalance.h, gsvd.cc, gsvd.h, hess.cc, hess.h,
lo-mappers.cc, lo-mappers.h, lo-specfun.cc, lo-specfun.h, lu.cc, lu.h,
oct-convn.cc, oct-convn.h, oct-fftw.cc, oct-fftw.h, oct-norm.cc, oct-norm.h,
oct-rand.cc, oct-rand.h, oct-spparms.cc, oct-spparms.h, qr.cc, qr.h, qrp.cc,
qrp.h, randgamma.cc, randgamma.h, randmtzig.cc, randmtzig.h, randpoisson.cc,
randpoisson.h, schur.cc, schur.h, sparse-chol.cc, sparse-chol.h, sparse-lu.cc,
sparse-lu.h, sparse-qr.cc, sparse-qr.h, svd.cc, svd.h, child-list.cc,
child-list.h, dir-ops.cc, dir-ops.h, file-ops.cc, file-ops.h, file-stat.cc,
file-stat.h, lo-sysdep.cc, lo-sysdep.h, lo-sysinfo.cc, lo-sysinfo.h,
mach-info.cc, mach-info.h, oct-env.cc, oct-env.h, oct-group.cc, oct-group.h,
oct-password.cc, oct-password.h, oct-syscalls.cc, oct-syscalls.h, oct-time.cc,
oct-time.h, oct-uname.cc, oct-uname.h, action-container.cc, action-container.h,
base-list.h, cmd-edit.cc, cmd-edit.h, cmd-hist.cc, cmd-hist.h, f77-fcn.h,
file-info.cc, file-info.h, lo-array-errwarn.cc, lo-array-errwarn.h, lo-hash.cc,
lo-hash.h, lo-ieee.h, lo-regexp.cc, lo-regexp.h, lo-utils.cc, lo-utils.h,
oct-base64.cc, oct-base64.h, oct-glob.cc, oct-glob.h, oct-inttypes.h,
oct-mutex.cc, oct-mutex.h, oct-refcount.h, oct-shlib.cc, oct-shlib.h,
oct-sparse.cc, oct-sparse.h, oct-string.h, octave-preserve-stream-state.h,
pathsearch.cc, pathsearch.h, quit.cc, quit.h, unwind-prot.cc, unwind-prot.h,
url-transfer.cc, url-transfer.h : Use new macros to begin/end C++ namespaces.
author | Rik <rik@octave.org> |
---|---|
date | Thu, 01 Dec 2022 14:23:45 -0800 |
parents | 796f54d4ddbf |
children | aac27ad79be6 |
line wrap: on
line source
//////////////////////////////////////////////////////////////////////// // // Copyright (C) 2003-2022 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/>. // //////////////////////////////////////////////////////////////////////// #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <cassert> #include <cstdint> #include <limits> #include "lo-error.h" #include "lo-ieee.h" #include "lo-mappers.h" #include "lo-ranlib-proto.h" #include "mach-info.h" #include "oct-locbuf.h" #include "oct-rand.h" #include "oct-time.h" #include "quit.h" #include "randgamma.h" #include "randmtzig.h" #include "randpoisson.h" #include "singleton-cleanup.h" OCTAVE_BEGIN_NAMESPACE(octave) rand *rand::m_instance = nullptr; rand::rand (void) : m_current_distribution (uniform_dist), m_use_old_generators (false), m_rand_states () { initialize_ranlib_generators (); initialize_mersenne_twister (); } bool rand::instance_ok (void) { bool retval = true; if (! m_instance) { m_instance = new rand (); singleton_cleanup_list::add (cleanup_instance); } return retval; } double rand::do_seed (void) { union d2i { double d; int32_t i[2]; }; union d2i u; mach_info::float_format ff = mach_info::native_float_format (); switch (ff) { case mach_info::flt_fmt_ieee_big_endian: F77_FUNC (getsd, GETSD) (u.i[1], u.i[0]); break; default: F77_FUNC (getsd, GETSD) (u.i[0], u.i[1]); break; } return u.d; } static int32_t force_to_fit_range (int32_t i, int32_t lo, int32_t hi) { assert (hi > lo && lo >= 0); i = (i > 0 ? i : -i); if (i < lo) i = lo; else if (i > hi) i = i % hi; return i; } void rand::do_seed (double s) { m_use_old_generators = true; int i0, i1; union d2i { double d; int32_t i[2]; }; union d2i u; u.d = s; mach_info::float_format ff = mach_info::native_float_format (); switch (ff) { case mach_info::flt_fmt_ieee_big_endian: i1 = force_to_fit_range (u.i[0], 1, 2147483563); i0 = force_to_fit_range (u.i[1], 1, 2147483399); break; default: i0 = force_to_fit_range (u.i[0], 1, 2147483563); i1 = force_to_fit_range (u.i[1], 1, 2147483399); break; } F77_FUNC (setsd, SETSD) (i0, i1); } void rand::do_reset (void) { m_use_old_generators = true; initialize_ranlib_generators (); } uint32NDArray rand::do_state (const std::string& d) { return m_rand_states[d.empty () ? m_current_distribution : get_dist_id (d)]; } void rand::do_state (const uint32NDArray& s, const std::string& d) { m_use_old_generators = false; int old_dist = m_current_distribution; int new_dist = (d.empty () ? m_current_distribution : get_dist_id (d)); uint32NDArray saved_state; if (old_dist != new_dist) saved_state = get_internal_state (); set_internal_state (s); m_rand_states[new_dist] = get_internal_state (); if (old_dist != new_dist) m_rand_states[old_dist] = saved_state; } void rand::do_reset (const std::string& d) { m_use_old_generators = false; int old_dist = m_current_distribution; int new_dist = (d.empty () ? m_current_distribution : get_dist_id (d)); uint32NDArray saved_state; if (old_dist != new_dist) saved_state = get_internal_state (); init_mersenne_twister (); m_rand_states[new_dist] = get_internal_state (); if (old_dist != new_dist) m_rand_states[old_dist] = saved_state; } std::string rand::do_distribution (void) { std::string retval; switch (m_current_distribution) { case uniform_dist: retval = "uniform"; break; case normal_dist: retval = "normal"; break; case expon_dist: retval = "exponential"; break; case poisson_dist: retval = "poisson"; break; case gamma_dist: retval = "gamma"; break; default: (*current_liboctave_error_handler) ("rand: invalid distribution ID = %d", m_current_distribution); break; } return retval; } void rand::do_distribution (const std::string& d) { int id = get_dist_id (d); switch (id) { case uniform_dist: rand::uniform_distribution (); break; case normal_dist: rand::normal_distribution (); break; case expon_dist: rand::exponential_distribution (); break; case poisson_dist: rand::poisson_distribution (); break; case gamma_dist: rand::gamma_distribution (); break; default: (*current_liboctave_error_handler) ("rand: invalid distribution ID = %d", id); break; } } void rand::do_uniform_distribution (void) { switch_to_generator (uniform_dist); F77_FUNC (setcgn, SETCGN) (uniform_dist); } void rand::do_normal_distribution (void) { switch_to_generator (normal_dist); F77_FUNC (setcgn, SETCGN) (normal_dist); } void rand::do_exponential_distribution (void) { switch_to_generator (expon_dist); F77_FUNC (setcgn, SETCGN) (expon_dist); } void rand::do_poisson_distribution (void) { switch_to_generator (poisson_dist); F77_FUNC (setcgn, SETCGN) (poisson_dist); } void rand::do_gamma_distribution (void) { switch_to_generator (gamma_dist); F77_FUNC (setcgn, SETCGN) (gamma_dist); } template <> OCTAVE_API double rand::uniform<double> (void) { double retval; if (m_use_old_generators) F77_FUNC (dgenunf, DGENUNF) (0.0, 1.0, retval); else retval = rand_uniform<double> (); return retval; } template <> OCTAVE_API double rand::normal<double> (void) { double retval; if (m_use_old_generators) F77_FUNC (dgennor, DGENNOR) (0.0, 1.0, retval); else retval = rand_normal<double> (); return retval; } template <> OCTAVE_API double rand::exponential<double> (void) { double retval; if (m_use_old_generators) F77_FUNC (dgenexp, DGENEXP) (1.0, retval); else retval = rand_exponential<double> (); return retval; } template <> OCTAVE_API double rand::poisson<double> (double a) { double retval; if (m_use_old_generators) { if (a < 0.0 || ! math::isfinite (a)) retval = numeric_limits<double>::NaN (); else { // workaround bug in ignpoi, by calling with different Mu F77_FUNC (dignpoi, DIGNPOI) (a + 1, retval); F77_FUNC (dignpoi, DIGNPOI) (a, retval); } } else retval = rand_poisson<double> (a); return retval; } template <> OCTAVE_API double rand::gamma<double> (double a) { double retval; if (m_use_old_generators) { if (a <= 0.0 || ! math::isfinite (a)) retval = numeric_limits<double>::NaN (); else F77_FUNC (dgengam, DGENGAM) (1.0, a, retval); } else retval = rand_gamma<double> (a); return retval; } template <> OCTAVE_API float rand::uniform<float> (void) { float retval; if (m_use_old_generators) F77_FUNC (fgenunf, FGENUNF) (0.0f, 1.0f, retval); else retval = rand_uniform<float> (); return retval; } template <> OCTAVE_API float rand::normal<float> (void) { float retval; if (m_use_old_generators) F77_FUNC (fgennor, FGENNOR) (0.0f, 1.0f, retval); else retval = rand_normal<float> (); return retval; } template <> OCTAVE_API float rand::exponential<float> (void) { float retval; if (m_use_old_generators) F77_FUNC (fgenexp, FGENEXP) (1.0f, retval); else retval = rand_exponential<float> (); return retval; } template <> OCTAVE_API float rand::poisson<float> (float a) { float retval; if (m_use_old_generators) { if (a < 0.0f || ! math::isfinite (a)) retval = numeric_limits<float>::NaN (); else { // workaround bug in ignpoi, by calling with different Mu F77_FUNC (fignpoi, FIGNPOI) (a + 1, retval); F77_FUNC (fignpoi, FIGNPOI) (a, retval); } } else { // Keep poisson distribution in double precision for accuracy retval = rand_poisson<double> (a); } return retval; } template <> OCTAVE_API float rand::gamma<float> (float a) { float retval; if (m_use_old_generators) { if (a <= 0.0f || ! math::isfinite (a)) retval = numeric_limits<float>::NaN (); else F77_FUNC (fgengam, FGENGAM) (1.0f, a, retval); } else retval = rand_gamma<float> (a); return retval; } template <typename T> T rand::do_scalar (T a) { T retval = 0; switch (m_current_distribution) { case uniform_dist: retval = uniform<T> (); break; case normal_dist: retval = normal<T> (); break; case expon_dist: retval = exponential<T> (); break; case poisson_dist: retval = poisson<T> (a); break; case gamma_dist: retval = gamma<T> (a); break; default: (*current_liboctave_error_handler) ("rand: invalid distribution ID = %d", m_current_distribution); break; } if (! m_use_old_generators) save_state (); return retval; } template OCTAVE_API double rand::do_scalar<double> (double); template OCTAVE_API float rand::do_scalar<float> (float); template <typename T> Array<T> rand::do_vector (octave_idx_type n, T a) { Array<T> retval; if (n > 0) { retval.clear (n, 1); fill (retval.numel (), retval.fortran_vec (), a); } else if (n < 0) (*current_liboctave_error_handler) ("rand: invalid negative argument"); return retval; } template OCTAVE_API Array<double> rand::do_vector<double> (octave_idx_type, double); template OCTAVE_API Array<float> rand::do_vector<float> (octave_idx_type, float); NDArray rand::do_nd_array (const dim_vector& dims, double a) { NDArray retval; if (! dims.all_zero ()) { retval.clear (dims); fill (retval.numel (), retval.fortran_vec (), a); } return retval; } FloatNDArray rand::do_float_nd_array (const dim_vector& dims, float a) { FloatNDArray retval; if (! dims.all_zero ()) { retval.clear (dims); fill (retval.numel (), retval.fortran_vec (), a); } return retval; } // Make the random number generator give us a different sequence every // time we start octave unless we specifically set the seed. The // technique used below will cycle monthly, but it does seem to // work ok to give fairly different seeds each time Octave starts. void rand::initialize_ranlib_generators (void) { sys::localtime tm; int stored_distribution = m_current_distribution; F77_FUNC (setcgn, SETCGN) (uniform_dist); int hour = tm.hour () + 1; int minute = tm.min () + 1; int second = tm.sec () + 1; int32_t s0 = tm.mday () * hour * minute * second; int32_t s1 = hour * minute * second; s0 = force_to_fit_range (s0, 1, 2147483563); s1 = force_to_fit_range (s1, 1, 2147483399); F77_FUNC (setall, SETALL) (s0, s1); F77_FUNC (setcgn, SETCGN) (stored_distribution); } void rand::initialize_mersenne_twister (void) { uint32NDArray s; init_mersenne_twister (); s = get_internal_state (); m_rand_states[uniform_dist] = s; init_mersenne_twister (); s = get_internal_state (); m_rand_states[normal_dist] = s; init_mersenne_twister (); s = get_internal_state (); m_rand_states[expon_dist] = s; init_mersenne_twister (); s = get_internal_state (); m_rand_states[poisson_dist] = s; init_mersenne_twister (); s = get_internal_state (); m_rand_states[gamma_dist] = s; // All of the initializations above have messed with the internal state. // Restore the state of the currently selected distribution. set_internal_state (m_rand_states[m_current_distribution]); } uint32NDArray rand::get_internal_state (void) { uint32NDArray s (dim_vector (MT_N + 1, 1)); get_mersenne_twister_state (reinterpret_cast<uint32_t *> (s.fortran_vec ())); return s; } void rand::save_state (void) { m_rand_states[m_current_distribution] = get_internal_state ();; } int rand::get_dist_id (const std::string& d) { int retval = unknown_dist; if (d == "uniform" || d == "rand") retval = uniform_dist; else if (d == "normal" || d == "randn") retval = normal_dist; else if (d == "exponential" || d == "rande") retval = expon_dist; else if (d == "poisson" || d == "randp") retval = poisson_dist; else if (d == "gamma" || d == "randg") retval = gamma_dist; else (*current_liboctave_error_handler) ("rand: invalid distribution '%s'", d.c_str ()); return retval; } void rand::set_internal_state (const uint32NDArray& s) { octave_idx_type len = s.numel (); const uint32_t *sdata = reinterpret_cast <const uint32_t *> (s.data ()); if (len == MT_N + 1 && sdata[MT_N] <= MT_N && sdata[MT_N] > 0) set_mersenne_twister_state (sdata); else init_mersenne_twister (sdata, len); } void rand::switch_to_generator (int dist) { if (dist != m_current_distribution) { m_current_distribution = dist; set_internal_state (m_rand_states[dist]); } } void rand::fill (octave_idx_type len, double *v, double a) { if (len < 1) return; switch (m_current_distribution) { case uniform_dist: if (m_use_old_generators) std::generate_n (v, len, [](void) { double x; F77_FUNC (dgenunf, DGENUNF) (0.0, 1.0, x); return x; }); else rand_uniform<double> (len, v); break; case normal_dist: if (m_use_old_generators) std::generate_n (v, len, [](void) { double x; F77_FUNC (dgennor, DGENNOR) (0.0, 1.0, x); return x; }); else rand_normal<double> (len, v); break; case expon_dist: if (m_use_old_generators) std::generate_n (v, len, [](void) { double x; F77_FUNC (dgenexp, DGENEXP) (1.0, x); return x; }); else rand_exponential<double> (len, v); break; case poisson_dist: if (m_use_old_generators) { if (a < 0.0 || ! math::isfinite (a)) std::fill_n (v, len, numeric_limits<double>::NaN ()); else { // workaround bug in ignpoi, by calling with different Mu double tmp; F77_FUNC (dignpoi, DIGNPOI) (a + 1, tmp); std::generate_n (v, len, [a](void) { double x; F77_FUNC (dignpoi, DIGNPOI) (a, x); return x; }); } } else rand_poisson<double> (a, len, v); break; case gamma_dist: if (m_use_old_generators) { if (a <= 0.0 || ! math::isfinite (a)) std::fill_n (v, len, numeric_limits<double>::NaN ()); else std::generate_n (v, len, [a](void) { double x; F77_FUNC (dgengam, DGENGAM) (1.0, a, x); return x; }); } else rand_gamma<double> (a, len, v); break; default: (*current_liboctave_error_handler) ("rand: invalid distribution ID = %d", m_current_distribution); break; } save_state (); return; } void rand::fill (octave_idx_type len, float *v, float a) { if (len < 1) return; switch (m_current_distribution) { case uniform_dist: if (m_use_old_generators) std::generate_n (v, len, [](void) { float x; F77_FUNC (fgenunf, FGENUNF) (0.0f, 1.0f, x); return x; }); else rand_uniform<float> (len, v); break; case normal_dist: if (m_use_old_generators) std::generate_n (v, len, [](void) { float x; F77_FUNC (fgennor, FGENNOR) (0.0f, 1.0f, x); return x; }); else rand_normal<float> (len, v); break; case expon_dist: if (m_use_old_generators) std::generate_n (v, len, [](void) { float x; F77_FUNC (fgenexp, FGENEXP) (1.0f, x); return x; }); else rand_exponential<float> (len, v); break; case poisson_dist: if (m_use_old_generators) { if (a < 0.0f || ! math::isfinite (a)) std::fill_n (v, len, numeric_limits<float>::NaN ()); else { // workaround bug in ignpoi, by calling with different Mu float tmp; F77_FUNC (fignpoi, FIGNPOI) (a + 1, tmp); std::generate_n (v, len, [a](void) { float x; F77_FUNC (fignpoi, FIGNPOI) (a, x); return x; }); } } else rand_poisson<float> (a, len, v); break; case gamma_dist: if (m_use_old_generators) { if (a <= 0.0f || ! math::isfinite (a)) std::fill_n (v, len, numeric_limits<float>::NaN ()); else std::generate_n (v, len, [a](void) { float x; F77_FUNC (fgengam, FGENGAM) (1.0f, a, x); return x; }); } else rand_gamma<float> (a, len, v); break; default: (*current_liboctave_error_handler) ("rand: invalid distribution ID = %d", m_current_distribution); break; } save_state (); return; } OCTAVE_END_NAMESPACE(octave)