1 /*
2 * Copyright (C) 2016, Mike Walters <mike@flomp.net>
3 *
4 * This file is part of inspectrum.
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "util.h"
21
formatSIValue(float value)22 std::string formatSIValue(float value)
23 {
24 std::map<int, std::string> prefixes = {
25 { 9, "G" },
26 { 6, "M" },
27 { 3, "k" },
28 { 0, "" },
29 { -3, "m" },
30 { -6, "µ" },
31 { -9, "n" },
32 };
33
34 int power = 0;
35 while (value < 1.0f && power > -9) {
36 value *= 1e3;
37 power -= 3;
38 }
39 while (value >= 1e3 && power < 9) {
40 value *= 1e-3;
41 power += 3;
42 }
43 std::stringstream ss;
44 ss << value << prefixes[power];
45 return ss.str();
46 }
47
getFileNameFilter()48 template<> const char* getFileNameFilter<std::complex<float>>() { return "complex<float> file (*.fc32)"; };
getFileNameFilter()49 template<> const char* getFileNameFilter<float>() { return "float file (*.f32)"; };
50