2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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 2 of the License, or
9 * (at your option) any later version.
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.
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/>.
29 #include <QTextStream>
37 static QTextStream& operator<<(QTextStream& stream, SIPrefix prefix)
40 case SIPrefix::yocto: return stream << 'y';
41 case SIPrefix::zepto: return stream << 'z';
42 case SIPrefix::atto: return stream << 'a';
43 case SIPrefix::femto: return stream << 'f';
44 case SIPrefix::pico: return stream << 'p';
45 case SIPrefix::nano: return stream << 'n';
46 case SIPrefix::micro: return stream << QChar(0x03BC);
47 case SIPrefix::milli: return stream << 'm';
48 case SIPrefix::kilo: return stream << 'k';
49 case SIPrefix::mega: return stream << 'M';
50 case SIPrefix::giga: return stream << 'G';
51 case SIPrefix::tera: return stream << 'T';
52 case SIPrefix::peta: return stream << 'P';
53 case SIPrefix::exa: return stream << 'E';
54 case SIPrefix::zetta: return stream << 'Z';
55 case SIPrefix::yotta: return stream << 'Y';
57 default: return stream;
61 int exponent(SIPrefix prefix)
63 return 3 * (static_cast<int>(prefix) - static_cast<int>(SIPrefix::none));
66 static SIPrefix successor(SIPrefix prefix)
68 assert(prefix != SIPrefix::yotta);
69 return static_cast<SIPrefix>(static_cast<int>(prefix) + 1);
72 // Insert the timestamp value into the stream in fixed-point notation
73 // (and honor the precision)
74 static QTextStream& operator<<(QTextStream& stream, const Timestamp& t)
76 // The multiprecision types already have a function and a stream insertion
77 // operator to convert them to a string, however these functions abuse a
78 // precision value of zero to print all available decimal places instead of
79 // none, and the boost authors refuse to fix this because they don't want
80 // to break buggy code that relies on this bug.
81 // (https://svn.boost.org/trac/boost/ticket/10103)
82 // Therefore we have to work around the case where precision is zero.
84 int precision = stream.realNumberPrecision();
86 std::ostringstream ss;
89 if (stream.numberFlags() & QTextStream::ForceSign)
93 ss << std::setprecision(1) << round(t);
95 ss << std::setprecision(precision) << t;
97 std::string str(ss.str());
99 // remove the separator and the unwanted decimal place
100 str.resize(str.size() - 2);
103 return stream << QString::fromStdString(str);
106 QString format_time_si(
109 unsigned int precision,
113 if (prefix == SIPrefix::unspecified) {
114 // No prefix given, calculate it
117 prefix = SIPrefix::none;
119 int exp = exponent(SIPrefix::yotta);
120 prefix = SIPrefix::yocto;
121 while ((fabs(v) * pow(Timestamp(10), exp)) > 999 &&
122 prefix < SIPrefix::yotta) {
123 prefix = successor(prefix);
129 assert(prefix >= SIPrefix::yocto);
130 assert(prefix <= SIPrefix::yotta);
132 const Timestamp multiplier = pow(Timestamp(10), -exponent(prefix));
136 if (sign && !v.is_zero())
139 << qSetRealNumberPrecision(precision)
148 QString format_time_si_adjusted(
155 // The precision is always given without taking the prefix into account
156 // so we need to deduct the number of decimals the prefix might imply
157 const int prefix_order = -exponent(prefix);
159 const unsigned int relative_prec =
160 (prefix >= SIPrefix::none) ? precision :
161 std::max((int)(precision - prefix_order), 0);
163 return format_time_si(t, prefix, relative_prec, unit, sign);
167 // Helper for 'format_time_minutes()'.
168 static QString pad_number(unsigned int number, int length)
170 return QString("%1").arg(number, length, 10, QChar('0'));
173 QString format_time_minutes(const Timestamp& t, signed precision, bool sign)
175 const Timestamp whole_seconds = floor(abs(t));
176 const Timestamp days = floor(whole_seconds / (60 * 60 * 24));
177 const unsigned int hours = fmod(whole_seconds / (60 * 60), 24).convert_to<uint>();
178 const unsigned int minutes = fmod(whole_seconds / 60, 60).convert_to<uint>();
179 const unsigned int seconds = fmod(whole_seconds, 60).convert_to<uint>();
189 bool use_padding = false;
193 ts << days.str().c_str() << ":";
199 ts << pad_number(hours, use_padding ? 2 : 0) << ":";
204 ts << pad_number(minutes, use_padding ? 2 : 0);
209 ts << pad_number(seconds, 2);
214 const Timestamp fraction = fabs(t) - whole_seconds;
216 std::ostringstream ss;
219 << std::setprecision(precision)
222 std::string fs = ss.str();
224 // Copy all digits, inserting spaces as unit separators
225 for (int i = 1; i <= precision; i++) {
226 // Start at index 2 to skip the "0." at the beginning
229 if ((i > 0) && (i % 3 == 0) && (i != precision))