octave-nkf: liboctave/array/Range.cc annotate

annotate liboctave/array/Range.cc @ 20492:642ce72cf1ab

maint: Periodic merge of stable to default.

author	Rik <rik@octave.org>
date	Thu, 20 Aug 2015 06:42:54 -0700
parents	00cf2847355d 7e9c752138ec
children	96153b16febe

rev	line source
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	1 /*
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	2
19731 4197fc428c7d maint: Update copyright notices for 2015. John W. Eaton <jwe@octave.org> parents: 18886 diff changeset	3 Copyright (C) 1993-2015 John W. Eaton
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	4
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	5 This file is part of Octave.
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	6
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	7 Octave is free software; you can redistribute it and/or modify it
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	8 under the terms of the GNU General Public License as published by the
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6490 diff changeset	9 Free Software Foundation; either version 3 of the License, or (at your
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6490 diff changeset	10 option) any later version.
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	11
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	12 Octave is distributed in the hope that it will be useful, but WITHOUT
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	15 for more details.
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	16
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	17 You should have received a copy of the GNU General Public License
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6490 diff changeset	18 along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6490 diff changeset	19 <http://www.gnu.org/licenses/>.
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	20
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	21 */
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	22
238 780cbbc57b7c [project @ 1993-11-30 20:23:04 by jwe] jwe parents: 208 diff changeset	23 #ifdef HAVE_CONFIG_H
1192 b6360f2d4fa6 [project @ 1995-03-30 21:38:35 by jwe] jwe parents: 1011 diff changeset	24 #include <config.h>
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	25 #endif
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	26
1546 a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	27 #include <cfloat>
1367 9f9131a8d706 [project @ 1995-09-06 00:07:03 by jwe] jwe parents: 1360 diff changeset	28
3503 d14c483b3c12 [project @ 2000-02-01 04:06:07 by jwe] jwe parents: 2847 diff changeset	29 #include <iostream>
6490 0ad7655cf2bc [project @ 2007-04-05 02:44:34 by jwe] jwe parents: 6457 diff changeset	30 #include <limits>
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	31
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	32 #include "Range.h"
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	33 #include "lo-error.h"
2383 096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	34 #include "lo-mappers.h"
7231 2eb392d058bb [project @ 2007-11-30 18:53:29 by jwe] jwe parents: 7017 diff changeset	35 #include "lo-math.h"
2383 096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	36 #include "lo-utils.h"
10366 e5ae13b8b2c2 improve Array indexing error messages Jaroslav Hajek <highegg@gmail.com> parents: 10314 diff changeset	37 #include "Array-util.h"
2383 096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	38
096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	39 bool
096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	40 Range::all_elements_are_ints (void) const
096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	41 {
096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	42 // If the base and increment are ints, the final value in the range
6457 a58b5981ab65 [project @ 2007-03-26 16:51:46 by jwe] jwe parents: 5307 diff changeset	43 // will also be an integer, even if the limit is not. If there is one
a58b5981ab65 [project @ 2007-03-26 16:51:46 by jwe] jwe parents: 5307 diff changeset	44 // or fewer elements only the base needs to be an integer
2383 096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	45
096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	46 return (! (xisnan (rng_base) \|\| xisnan (rng_inc))
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	47 && (NINTbig (rng_base) == rng_base \|\| rng_numel < 1)
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	48 && (NINTbig (rng_inc) == rng_inc \|\| rng_numel <= 1));
2383 096529066838 [project @ 1996-10-12 17:50:47 by jwe] jwe parents: 1993 diff changeset	49 }
645 21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	50
21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	51 Matrix
21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	52 Range::matrix_value (void) const
21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	53 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	54 if (rng_numel > 0 && cache.numel () == 0)
645 21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	55 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	56 cache.resize (1, rng_numel);
645 21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	57 double b = rng_base;
21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	58 double increment = rng_inc;
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	59 if (rng_numel > 0)
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	60 {
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	61 // The first element must always be exactly the base.
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	62 // E.g, -0 would otherwise become +0 in the loop (-0 + 0*increment).
17769 49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	63 cache(0) = b;
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	64 for (octave_idx_type i = 1; i < rng_numel; i++)
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	65 cache(i) = b + i * increment;
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	66 }
4791 62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	67
62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	68 // On some machines (x86 with extended precision floating point
62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	69 // arithmetic, for example) it is possible that we can overshoot
62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	70 // the limit by approximately the machine precision even though
62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	71 // we were very careful in our calculation of the number of
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	72 // elements. The tests need equality (>= rng_limit or <= rng_limit)
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	73 // to have expressions like -5:1:-0 result in a -0 endpoint.
4791 62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	74
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	75 if ((rng_inc > 0 && cache(rng_numel-1) >= rng_limit)
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	76 \|\| (rng_inc < 0 && cache(rng_numel-1) <= rng_limit))
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	77 cache(rng_numel-1) = rng_limit;
645 21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	78 }
21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	79
4810 72a6d410a14a [project @ 2004-03-03 18:49:39 by jwe] jwe parents: 4791 diff changeset	80 return cache;
645 21cb3c7dc9e3 [project @ 1994-08-24 06:19:54 by jwe] jwe parents: 461 diff changeset	81 }
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	82
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	83 double
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	84 Range::checkelem (octave_idx_type i) const
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	85 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	86 if (i < 0 \|\| i >= rng_numel)
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	87 gripe_index_out_of_range (1, 1, i+1, rng_numel);
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	88
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	89 if (i == 0)
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	90 return rng_base;
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	91 else if (i < rng_numel - 1)
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	92 return rng_base + i * rng_inc;
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	93 else
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	94 {
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	95 double end = rng_base + i * rng_inc;
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	96 if ((rng_inc > 0 && end >= rng_limit)
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	97 \|\| (rng_inc < 0 && end <= rng_limit))
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	98 return rng_limit;
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	99 else
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	100 return end;
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	101 }
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	102 }
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	103
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	104 double
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	105 Range::elem (octave_idx_type i) const
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	106 {
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	107 #if defined (BOUNDS_CHECKING)
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	108 return checkelem (i);
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	109 #else
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	110 if (i == 0)
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	111 return rng_base;
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	112 else if (i < rng_numel - 1)
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	113 return rng_base + i * rng_inc;
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	114 else
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	115 {
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	116 double end = rng_base + i * rng_inc;
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	117 if ((rng_inc > 0 && end >= rng_limit)
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	118 \|\| (rng_inc < 0 && end <= rng_limit))
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	119 return rng_limit;
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	120 else
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	121 return end;
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	122 }
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	123 #endif
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	124 }
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	125
16186 b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	126 // Helper class used solely for idx_vector.loop () function call
b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	127 class __rangeidx_helper
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	128 {
17769 49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	129 public:
16186 b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	130 __rangeidx_helper (double *a, double b, double i, double l, octave_idx_type n)
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	131 : array (a), base (b), inc (i), limit (l), nmax (n-1) { }
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	132
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	133 void operator () (octave_idx_type i)
17769 49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	134 {
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	135 if (i == 0)
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	136 *array++ = base;
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	137 else if (i < nmax)
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	138 array++ = base + i inc;
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	139 else
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	140 {
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	141 double end = base + i * inc;
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	142 if ((inc > 0 && end >= limit) \|\| (inc < 0 && end <= limit))
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	143 *array++ = limit;
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	144 else
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	145 *array++ = end;
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	146 }
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	147 }
16186 b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	148
17769 49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	149 private:
16186 b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	150
b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	151 double *array, base, inc, limit;
b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	152 octave_idx_type nmax;
b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	153
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	154 };
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	155
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	156 Array<double>
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	157 Range::index (const idx_vector& i) const
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	158 {
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	159 Array<double> retval;
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	160
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	161 octave_idx_type n = rng_numel;
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	162
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	163 if (i.is_colon ())
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	164 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	165 retval = matrix_value ().reshape (dim_vector (rng_numel, 1));
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	166 }
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	167 else
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	168 {
10366 e5ae13b8b2c2 improve Array indexing error messages Jaroslav Hajek <highegg@gmail.com> parents: 10314 diff changeset	169 if (i.extent (n) != n)
e5ae13b8b2c2 improve Array indexing error messages Jaroslav Hajek <highegg@gmail.com> parents: 10314 diff changeset	170 gripe_index_out_of_range (1, 1, i.extent (n), n); // throws
e5ae13b8b2c2 improve Array indexing error messages Jaroslav Hajek <highegg@gmail.com> parents: 10314 diff changeset	171
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	172 dim_vector rd = i.orig_dimensions ();
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	173 octave_idx_type il = i.length (n);
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	174
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	175 // taken from Array.cc.
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	176 if (n != 1 && rd.is_vector ())
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	177 rd = dim_vector (1, il);
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	178
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	179 retval.clear (rd);
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	180
16186 b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	181 // idx_vector loop across all values in i,
b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	182 // executing __rangeidx_helper (i) for each i
b4a6895a9863 Use proper OO-class for __rangeidx_helper(). Rik <rik@octave.org> parents: 16169 diff changeset	183 i.loop (n, __rangeidx_helper (retval.fortran_vec (),
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	184 rng_base, rng_inc, rng_limit, rng_numel));
9986 672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	185 }
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	186
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	187 return retval;
672e1b49e01e optimize indexing of ranges by single subscripts Jaroslav Hajek <highegg@gmail.com> parents: 8971 diff changeset	188 }
4810 72a6d410a14a [project @ 2004-03-03 18:49:39 by jwe] jwe parents: 4791 diff changeset	189
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	190 // NOTE: max and min only return useful values if numel > 0.
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	191 // do_minmax_body() in max.cc avoids calling Range::min/max if numel == 0.
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	192
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	193 double
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	194 Range::min (void) const
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	195 {
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	196 double retval = 0.0;
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	197 if (rng_numel > 0)
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	198 {
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	199 if (rng_inc > 0)
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	200 retval = rng_base;
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	201 else
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	202 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	203 retval = rng_base + (rng_numel - 1) * rng_inc;
4791 62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	204
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	205 // See the note in the matrix_value method above.
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	206 if (retval <= rng_limit)
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	207 retval = rng_limit;
07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	208 }
4791 62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	209
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	210 }
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	211 return retval;
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	212 }
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	213
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	214 double
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	215 Range::max (void) const
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	216 {
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	217 double retval = 0.0;
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	218 if (rng_numel > 0)
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	219 {
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	220 if (rng_inc > 0)
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	221 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	222 retval = rng_base + (rng_numel - 1) * rng_inc;
4791 62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	223
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	224 // See the note in the matrix_value method above.
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	225 if (retval >= rng_limit)
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	226 retval = rng_limit;
07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	227 }
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	228 else
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	229 retval = rng_base;
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	230 }
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	231 return retval;
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	232 }
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	233
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	234 void
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	235 Range::sort_internal (bool ascending)
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	236 {
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	237 if (ascending && rng_base > rng_limit && rng_inc < 0.0)
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	238 {
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	239 double tmp = rng_base;
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	240 rng_base = min ();
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	241 rng_limit = tmp;
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	242 rng_inc = -rng_inc;
4811 198f3712c692 [project @ 2004-03-03 19:24:33 by jwe] jwe parents: 4810 diff changeset	243 clear_cache ();
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	244 }
8565 4a864c4e682d fix sorting of ranges Jaroslav Hajek <highegg@gmail.com> parents: 8553 diff changeset	245 else if (! ascending && rng_base < rng_limit && rng_inc > 0.0)
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	246 {
20491 7e9c752138ec Fix 'descending' sort of Range objects (bug #45739). Rik <rik@octave.org> parents: 19731 diff changeset	247 double tmp = max ();
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	248 rng_limit = min ();
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	249 rng_base = tmp;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	250 rng_inc = -rng_inc;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	251 clear_cache ();
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	252 }
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	253 }
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	254
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	255 void
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	256 Range::sort_internal (Array<octave_idx_type>& sidx, bool ascending)
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	257 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	258 octave_idx_type nel = numel ();
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	259
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	260 sidx.resize (dim_vector (1, nel));
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	261
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	262 octave_idx_type *psidx = sidx.fortran_vec ();
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	263
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	264 bool reverse = false;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	265
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	266 if (ascending && rng_base > rng_limit && rng_inc < 0.0)
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	267 {
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	268 double tmp = rng_base;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	269 rng_base = min ();
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	270 rng_limit = tmp;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	271 rng_inc = -rng_inc;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	272 clear_cache ();
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	273 reverse = true;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	274 }
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	275 else if (! ascending && rng_base < rng_limit && rng_inc > 0.0)
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	276 {
20491 7e9c752138ec Fix 'descending' sort of Range objects (bug #45739). Rik <rik@octave.org> parents: 19731 diff changeset	277 double tmp = max ();
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	278 rng_limit = min ();
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	279 rng_base = tmp;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	280 rng_inc = -rng_inc;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	281 clear_cache ();
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	282 reverse = true;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	283 }
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	284
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	285 octave_idx_type tmp = reverse ? nel - 1 : 0;
7467 ba4214856f9f avoid shadow warning John W. Eaton <jwe@octave.org> parents: 7463 diff changeset	286 octave_idx_type stp = reverse ? -1 : 1;
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	287
7467 ba4214856f9f avoid shadow warning John W. Eaton <jwe@octave.org> parents: 7463 diff changeset	288 for (octave_idx_type i = 0; i < nel; i++, tmp += stp)
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	289 psidx[i] = tmp;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	290
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	291 }
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	292
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	293 Matrix
7620 36594d5bbe13 Move diag function into the octave_value class David Bateman <dbateman@free.fr> parents: 7467 diff changeset	294 Range::diag (octave_idx_type k) const
36594d5bbe13 Move diag function into the octave_value class David Bateman <dbateman@free.fr> parents: 7467 diff changeset	295 {
8971 967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	296 return matrix_value ().diag (k);
7620 36594d5bbe13 Move diag function into the octave_value class David Bateman <dbateman@free.fr> parents: 7467 diff changeset	297 }
36594d5bbe13 Move diag function into the octave_value class David Bateman <dbateman@free.fr> parents: 7467 diff changeset	298
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	299 Range
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	300 Range::sort (octave_idx_type dim, sortmode mode) const
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	301 {
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	302 Range retval = *this;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	303
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	304 if (dim == 1)
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	305 {
7463 2467639bd8c0 eliminate UNDEFINED sort mode John W. Eaton <jwe@octave.org> parents: 7458 diff changeset	306 if (mode == ASCENDING)
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	307 retval.sort_internal (true);
7463 2467639bd8c0 eliminate UNDEFINED sort mode John W. Eaton <jwe@octave.org> parents: 7458 diff changeset	308 else if (mode == DESCENDING)
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	309 retval.sort_internal (false);
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	310 }
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	311 else if (dim != 0)
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	312 (*current_liboctave_error_handler) ("Range::sort: invalid dimension");
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	313
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	314 return retval;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	315 }
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	316
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	317 Range
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	318 Range::sort (Array<octave_idx_type>& sidx, octave_idx_type dim,
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	319 sortmode mode) const
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	320 {
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	321 Range retval = *this;
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	322
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	323 if (dim == 1)
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	324 {
7463 2467639bd8c0 eliminate UNDEFINED sort mode John W. Eaton <jwe@octave.org> parents: 7458 diff changeset	325 if (mode == ASCENDING)
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	326 retval.sort_internal (sidx, true);
7463 2467639bd8c0 eliminate UNDEFINED sort mode John W. Eaton <jwe@octave.org> parents: 7458 diff changeset	327 else if (mode == DESCENDING)
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	328 retval.sort_internal (sidx, false);
7458 1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	329 }
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	330 else if (dim != 0)
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	331 (*current_liboctave_error_handler) ("Range::sort: invalid dimension");
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	332
1032e24f199f make sort work for ranges John W. Eaton <jwe@octave.org> parents: 7231 diff changeset	333 return retval;
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	334 }
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	335
8721 e9cb742df9eb imported patch sort3.diff Jaroslav Hajek <highegg@gmail.com> parents: 8589 diff changeset	336 sortmode
e9cb742df9eb imported patch sort3.diff Jaroslav Hajek <highegg@gmail.com> parents: 8589 diff changeset	337 Range::is_sorted (sortmode mode) const
e9cb742df9eb imported patch sort3.diff Jaroslav Hajek <highegg@gmail.com> parents: 8589 diff changeset	338 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	339 if (rng_numel > 1 && rng_inc > 0)
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	340 mode = (mode == DESCENDING) ? UNSORTED : ASCENDING;
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	341 else if (rng_numel > 1 && rng_inc < 0)
8721 e9cb742df9eb imported patch sort3.diff Jaroslav Hajek <highegg@gmail.com> parents: 8589 diff changeset	342 mode = (mode == ASCENDING) ? UNSORTED : DESCENDING;
e9cb742df9eb imported patch sort3.diff Jaroslav Hajek <highegg@gmail.com> parents: 8589 diff changeset	343 else
e9cb742df9eb imported patch sort3.diff Jaroslav Hajek <highegg@gmail.com> parents: 8589 diff changeset	344 mode = mode ? mode : ASCENDING;
8742 d2b06871afac add missing return statement Jaroslav Hajek <highegg@gmail.com> parents: 8721 diff changeset	345
d2b06871afac add missing return statement Jaroslav Hajek <highegg@gmail.com> parents: 8721 diff changeset	346 return mode;
8721 e9cb742df9eb imported patch sort3.diff Jaroslav Hajek <highegg@gmail.com> parents: 8589 diff changeset	347 }
e9cb742df9eb imported patch sort3.diff Jaroslav Hajek <highegg@gmail.com> parents: 8589 diff changeset	348
3504 5eef8a2294bd [project @ 2000-02-01 10:06:51 by jwe] jwe parents: 3503 diff changeset	349 std::ostream&
5eef8a2294bd [project @ 2000-02-01 10:06:51 by jwe] jwe parents: 3503 diff changeset	350 operator << (std::ostream& os, const Range& a)
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	351 {
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	352 double b = a.base ();
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	353 double increment = a.inc ();
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	354 octave_idx_type num_elem = a.numel ();
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	355
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	356 if (num_elem > 1)
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	357 {
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	358 // First element must be the base exactly (-0).
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	359 os << b << " ";
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	360 for (octave_idx_type i = 1; i < num_elem-1; i++)
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	361 os << b + i * increment << " ";
0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	362 }
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	363
16169 0303fda3e929 Fix range behavior with -0 endpoints (bug #38423) Rik <rik@octave.org> parents: 15271 diff changeset	364 // Prevent overshoot. See comment in the matrix_value method above.
4791 62f2fb593455 [project @ 2004-02-20 18:02:59 by jwe] jwe parents: 4192 diff changeset	365 os << (increment > 0 ? a.max () : a.min ()) << "\n";
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	366
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	367 return os;
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	368 }
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	369
3504 5eef8a2294bd [project @ 2000-02-01 10:06:51 by jwe] jwe parents: 3503 diff changeset	370 std::istream&
5eef8a2294bd [project @ 2000-02-01 10:06:51 by jwe] jwe parents: 3503 diff changeset	371 operator >> (std::istream& is, Range& a)
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	372 {
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	373 is >> a.rng_base;
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	374 if (is)
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	375 {
208 380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe] jwe parents: 3 diff changeset	376 is >> a.rng_limit;
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	377 if (is)
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	378 {
07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	379 is >> a.rng_inc;
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	380 a.rng_numel = a.numel_internal ();
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	381 }
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	382 }
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	383
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	384 return is;
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	385 }
9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	386
2599 9705ea40f0a2 [project @ 1996-12-19 04:49:09 by jwe] jwe parents: 2383 diff changeset	387 Range
9705ea40f0a2 [project @ 1996-12-19 04:49:09 by jwe] jwe parents: 2383 diff changeset	388 operator - (const Range& r)
9705ea40f0a2 [project @ 1996-12-19 04:49:09 by jwe] jwe parents: 2383 diff changeset	389 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	390 return Range (-r.base (), -r.limit (), -r.inc (), r.numel ());
2599 9705ea40f0a2 [project @ 1996-12-19 04:49:09 by jwe] jwe parents: 2383 diff changeset	391 }
9705ea40f0a2 [project @ 1996-12-19 04:49:09 by jwe] jwe parents: 2383 diff changeset	392
8553 c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	393 Range operator + (double x, const Range& r)
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	394 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	395 Range result (x + r.base (), x + r.limit (), r.inc (), r.numel ());
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	396 if (result.rng_numel < 0)
8971 967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	397 result.cache = x + r.matrix_value ();
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	398
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	399 return result;
8553 c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	400 }
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	401
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	402 Range operator + (const Range& r, double x)
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	403 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	404 Range result (r.base () + x, r.limit () + x, r.inc (), r.numel ());
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	405 if (result.rng_numel < 0)
8971 967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	406 result.cache = r.matrix_value () + x;
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	407
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	408 return result;
8553 c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	409 }
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	410
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	411 Range operator - (double x, const Range& r)
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	412 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	413 Range result (x - r.base (), x - r.limit (), -r.inc (), r.numel ());
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	414 if (result.rng_numel < 0)
8971 967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	415 result.cache = x - r.matrix_value ();
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	416
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	417 return result;
8553 c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	418 }
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	419
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	420 Range operator - (const Range& r, double x)
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	421 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	422 Range result (r.base () - x, r.limit () - x, r.inc (), r.numel ());
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	423 if (result.rng_numel < 0)
8971 967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	424 result.cache = r.matrix_value () - x;
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	425
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	426 return result;
8553 c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	427 }
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	428
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	429 Range operator * (double x, const Range& r)
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	430 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	431 Range result (x * r.base (), x * r.limit (), x * r.inc (), r.numel ());
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	432 if (result.rng_numel < 0)
8971 967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	433 result.cache = x * r.matrix_value ();
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	434
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	435 return result;
8553 c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	436 }
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	437
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	438 Range operator * (const Range& r, double x)
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	439 {
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	440 Range result (r.base () * x, r.limit () * x, r.inc () * x, r.numel ());
00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	441 if (result.rng_numel < 0)
8971 967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	442 result.cache = r.matrix_value () * x;
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	443
967a692ddfe2 fix range arithmetics Jaroslav Hajek <highegg@gmail.com> parents: 8920 diff changeset	444 return result;
8553 c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	445 }
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	446
c7ff200e45f5 optimize range-scalar ops Jaroslav Hajek <highegg@gmail.com> parents: 7620 diff changeset	447
1546 a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	448 // C See Knuth, Art Of Computer Programming, Vol. 1, Problem 1.2.4-5.
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	449 // C
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	450 // C===Tolerant FLOOR function.
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	451 // C
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	452 // C X - is given as a Double Precision argument to be operated on.
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	453 // C It is assumed that X is represented with M mantissa bits.
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	454 // C CT - is given as a Comparison Tolerance such that
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	455 // C 0.LT.CT.LE.3-SQRT(5)/2. If the relative difference between
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	456 // C X and A whole number is less than CT, then TFLOOR is
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	457 // C returned as this whole number. By treating the
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	458 // C floating-point numbers as a finite ordered set note that
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	459 // C the heuristic EPS=2.*(-(M-1)) and CT=3EPS causes
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	460 // C arguments of TFLOOR/TCEIL to be treated as whole numbers
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	461 // C if they are exactly whole numbers or are immediately
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	462 // C adjacent to whole number representations. Since EPS, the
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	463 // C "distance" between floating-point numbers on the unit
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	464 // C interval, and M, the number of bits in X'S mantissa, exist
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	465 // C on every floating-point computer, TFLOOR/TCEIL are
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	466 // C consistently definable on every floating-point computer.
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	467 // C
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	468 // C For more information see the following references:
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	469 // C (1) P. E. Hagerty, "More On Fuzzy Floor And Ceiling," APL QUOTE
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	470 // C QUAD 8(4):20-24, June 1978. Note that TFLOOR=FL5.
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	471 // C (2) L. M. Breed, "Definitions For Fuzzy Floor And Ceiling", APL
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	472 // C QUOTE QUAD 8(3):16-23, March 1978. This paper cites FL1 through
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	473 // C FL5, the history of five years of evolutionary development of
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	474 // C FL5 - the seven lines of code below - by open collaboration
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	475 // C and corroboration of the mathematical-computing community.
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	476 // C
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	477 // C Penn State University Center for Academic Computing
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	478 // C H. D. Knoble - August, 1978.
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	479
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	480 static inline double
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	481 tfloor (double x, double ct)
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	482 {
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	483 // C---------FLOOR(X) is the largest integer algebraically less than
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	484 // C or equal to X; that is, the unfuzzy FLOOR function.
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	485
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	486 // DINT (X) = X - DMOD (X, 1.0);
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	487 // FLOOR (X) = DINT (X) - DMOD (2.0 + DSIGN (1.0, X), 3.0);
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	488
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	489 // C---------Hagerty's FL5 function follows...
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	490
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	491 double q = 1.0;
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	492
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	493 if (x < 0.0)
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	494 q = 1.0 - ct;
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	495
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	496 double rmax = q / (2.0 - ct);
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	497
11450 5eb10763069f substitute and use LAPACK_LIBS in mkoctfile script John W. Eaton <jwe@octave.org> parents: 10366 diff changeset	498 double t1 = 1.0 + gnulib::floor (x);
1546 a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	499 t1 = (ct / q) * (t1 < 0.0 ? -t1 : t1);
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	500 t1 = rmax < t1 ? rmax : t1;
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	501 t1 = ct > t1 ? ct : t1;
11450 5eb10763069f substitute and use LAPACK_LIBS in mkoctfile script John W. Eaton <jwe@octave.org> parents: 10366 diff changeset	502 t1 = gnulib::floor (x + t1);
1546 a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	503
1555 6935e817fd25 [project @ 1995-10-11 05:49:55 by jwe] jwe parents: 1548 diff changeset	504 if (x <= 0.0 \|\| (t1 - x) < rmax)
1546 a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	505 return t1;
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	506 else
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	507 return t1 - 1.0;
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	508 }
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	509
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	510 static inline double
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	511 tceil (double x, double ct)
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	512 {
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	513 return -tfloor (-x, ct);
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	514 }
a272c4056bab [project @ 1995-10-07 03:38:40 by jwe] jwe parents: 1367 diff changeset	515
3753 f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	516 static inline bool
17769 49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	517 teq (double u, double v,
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	518 double ct = 3.0 * std::numeric_limits<double>::epsilon ())
3753 f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	519 {
f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	520 double tu = fabs (u);
f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	521 double tv = fabs (v);
f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	522
f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	523 return fabs (u - v) < ((tu > tv ? tu : tv) * ct);
f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	524 }
f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	525
5275 23b37da9fd5b [project @ 2005-04-08 16:07:35 by jwe] jwe parents: 5105 diff changeset	526 octave_idx_type
20263 00cf2847355d Deprecate Array::nelem() and Range::nelem() in favour of ::numel(). Carnë Draug <carandraug@octave.org> parents: 19731 diff changeset	527 Range::numel_internal (void) const
1360 7eb93d12654c [project @ 1995-09-05 21:51:54 by jwe] jwe parents: 1315 diff changeset	528 {
5275 23b37da9fd5b [project @ 2005-04-08 16:07:35 by jwe] jwe parents: 5105 diff changeset	529 octave_idx_type retval = -1;
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	530
3858 de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	531 if (rng_inc == 0
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	532 \|\| (rng_limit > rng_base && rng_inc < 0)
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	533 \|\| (rng_limit < rng_base && rng_inc > 0))
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	534 {
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	535 retval = 0;
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	536 }
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	537 else
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	538 {
15220 61822c866ba1 use std::numeric_limits<T>::epsilon in C++ code John W. Eaton <jwe@octave.org> parents: 14138 diff changeset	539 double ct = 3.0 * std::numeric_limits<double>::epsilon ();
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	540
3858 de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	541 double tmp = tfloor ((rng_limit - rng_base + rng_inc) / rng_inc, ct);
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	542
17769 49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	543 octave_idx_type n_elt = (tmp > 0.0 ? static_cast<octave_idx_type> (tmp)
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	544 : 0);
398 167ea9ebd5a0 [project @ 1994-04-06 18:41:44 by jwe] jwe parents: 238 diff changeset	545
3858 de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	546 // If the final element that we would compute for the range is
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	547 // equal to the limit of the range, or is an adjacent floating
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	548 // point number, accept it. Otherwise, try a range with one
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	549 // fewer element. If that fails, try again with one more
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	550 // element.
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	551 //
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	552 // I'm not sure this is very good, but it seems to work better than
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	553 // just using tfloor as above. For example, without it, the
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	554 // expression 1.8:0.05:1.9 fails to produce the expected result of
de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	555 // [1.8, 1.85, 1.9].
3753 f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	556
3858 de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	557 if (! teq (rng_base + (n_elt - 1) * rng_inc, rng_limit))
10314 07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	558 {
07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	559 if (teq (rng_base + (n_elt - 2) * rng_inc, rng_limit))
07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	560 n_elt--;
07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	561 else if (teq (rng_base + n_elt * rng_inc, rng_limit))
07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	562 n_elt++;
07ebe522dac2 untabify liboctave C++ sources John W. Eaton <jwe@octave.org> parents: 10158 diff changeset	563 }
3858 de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	564
17769 49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	565 retval = (n_elt < std::numeric_limits<octave_idx_type>::max () - 1)
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/ Rik <rik@octave.org> parents: 17744 diff changeset	566 ? n_elt : -1;
3753 f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	567 }
f751e43de300 [project @ 2000-12-14 03:01:23 by jwe] jwe parents: 3751 diff changeset	568
3858 de05e6bdf897 [project @ 2001-11-08 19:34:22 by jwe] jwe parents: 3753 diff changeset	569 return retval;
3 9a4c07481e61 [project @ 1993-08-08 01:20:23 by jwe] jwe parents: diff changeset	570 }

Mercurial > octave-nkf

annotate liboctave/array/Range.cc @ 20492:642ce72cf1ab