1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
//! \addtogroup fn_regspace
//! @{
template<typename eT>
inline
void
internal_regspace_default_delta
(
Mat<eT>& x,
const typename Mat<eT>::pod_type start,
const typename Mat<eT>::pod_type end
)
{
arma_extra_debug_sigprint();
typedef typename Mat<eT>::pod_type T;
const bool ascend = (start <= end);
const uword N = uword(1) + uword((ascend) ? (end-start) : (start-end));
x.set_size(N);
eT* x_mem = x.memptr();
if(ascend)
{
for(uword i=0; i < N; ++i) { x_mem[i] = eT(start + T(i)); }
}
else
{
for(uword i=0; i < N; ++i) { x_mem[i] = eT(start - T(i)); }
}
}
template<typename eT, typename sT>
inline
typename enable_if2< (is_signed<sT>::value == true), void >::result
internal_regspace_var_delta
(
Mat<eT>& x,
const typename Mat<eT>::pod_type start,
const sT delta,
const typename Mat<eT>::pod_type end
)
{
arma_extra_debug_sigprint();
arma_extra_debug_print("internal_regspace_var_delta(): signed version");
typedef typename Mat<eT>::pod_type T;
if( ((start < end) && (delta < sT(0))) || ((start > end) && (delta > sT(0))) || (delta == sT(0)) ) { return; }
const bool ascend = (start <= end);
const T inc = (delta < sT(0)) ? T(-delta) : T(delta);
const T M = ((ascend) ? T(end-start) : T(start-end)) / T(inc);
const uword N = uword(1) + ( (is_non_integral<T>::value) ? uword(std::floor(double(M))) : uword(M) );
x.set_size(N);
eT* x_mem = x.memptr();
if(ascend)
{
for(uword i=0; i < N; ++i) { x_mem[i] = eT( start + T(i*inc) ); }
}
else
{
for(uword i=0; i < N; ++i) { x_mem[i] = eT( start - T(i*inc) ); }
}
}
template<typename eT, typename uT>
inline
typename enable_if2< (is_signed<uT>::value == false), void >::result
internal_regspace_var_delta
(
Mat<eT>& x,
const typename Mat<eT>::pod_type start,
const uT delta,
const typename Mat<eT>::pod_type end
)
{
arma_extra_debug_sigprint();
arma_extra_debug_print("internal_regspace_var_delta(): unsigned version");
typedef typename Mat<eT>::pod_type T;
if( ((start > end) && (delta > uT(0))) || (delta == uT(0)) ) { return; }
const bool ascend = (start <= end);
const T inc = T(delta);
const T M = ((ascend) ? T(end-start) : T(start-end)) / T(inc);
const uword N = uword(1) + ( (is_non_integral<T>::value) ? uword(std::floor(double(M))) : uword(M) );
x.set_size(N);
eT* x_mem = x.memptr();
if(ascend)
{
for(uword i=0; i < N; ++i) { x_mem[i] = eT( start + T(i*inc) ); }
}
else
{
for(uword i=0; i < N; ++i) { x_mem[i] = eT( start - T(i*inc) ); }
}
}
template<typename vec_type, typename sT>
inline
typename enable_if2< is_Mat<vec_type>::value && (is_signed<sT>::value == true), vec_type >::result
regspace
(
const typename vec_type::pod_type start,
const sT delta,
const typename vec_type::pod_type end
)
{
arma_extra_debug_sigprint();
arma_extra_debug_print("regspace(): signed version");
vec_type x;
if( ((delta == sT(+1)) && (start <= end)) || ((delta == sT(-1)) && (start > end)) )
{
internal_regspace_default_delta(x, start, end);
}
else
{
internal_regspace_var_delta(x, start, delta, end);
}
if(x.n_elem == 0)
{
if(is_Mat_only<vec_type>::value) { x.set_size(1,0); }
}
return x;
}
template<typename vec_type, typename uT>
inline
typename enable_if2< is_Mat<vec_type>::value && (is_signed<uT>::value == false), vec_type >::result
regspace
(
const typename vec_type::pod_type start,
const uT delta,
const typename vec_type::pod_type end
)
{
arma_extra_debug_sigprint();
arma_extra_debug_print("regspace(): unsigned version");
vec_type x;
if( (delta == uT(+1)) && (start <= end) )
{
internal_regspace_default_delta(x, start, end);
}
else
{
internal_regspace_var_delta(x, start, delta, end);
}
if(x.n_elem == 0)
{
if(is_Mat_only<vec_type>::value) { x.set_size(1,0); }
}
return x;
}
template<typename vec_type>
arma_warn_unused
inline
typename
enable_if2
<
is_Mat<vec_type>::value,
vec_type
>::result
regspace
(
const typename vec_type::pod_type start,
const typename vec_type::pod_type end
)
{
arma_extra_debug_sigprint();
vec_type x;
internal_regspace_default_delta(x, start, end);
if(x.n_elem == 0)
{
if(is_Mat_only<vec_type>::value) { x.set_size(1,0); }
}
return x;
}
arma_warn_unused
inline
vec
regspace(const double start, const double delta, const double end)
{
arma_extra_debug_sigprint();
return regspace<vec>(start, delta, end);
}
arma_warn_unused
inline
vec
regspace(const double start, const double end)
{
arma_extra_debug_sigprint();
return regspace<vec>(start, end);
}
//! @}
|
