* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "util.hpp"
#include <assert.h>
+#include <algorithm>
+#include <sstream>
+
#include <QTextStream>
#include <QDebug>
namespace pv {
namespace util {
-static const QString SIPrefixes[9] =
- {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"};
-const int FirstSIPrefixPower = -15;
+static QTextStream& operator<<(QTextStream& stream, SIPrefix prefix)
+{
+ switch (prefix) {
+ case SIPrefix::yocto: return stream << 'y';
+ case SIPrefix::zepto: return stream << 'z';
+ case SIPrefix::atto: return stream << 'a';
+ case SIPrefix::femto: return stream << 'f';
+ case SIPrefix::pico: return stream << 'p';
+ case SIPrefix::nano: return stream << 'n';
+ case SIPrefix::micro: return stream << QChar(0x03BC);
+ case SIPrefix::milli: return stream << 'm';
+ case SIPrefix::kilo: return stream << 'k';
+ case SIPrefix::mega: return stream << 'M';
+ case SIPrefix::giga: return stream << 'G';
+ case SIPrefix::tera: return stream << 'T';
+ case SIPrefix::peta: return stream << 'P';
+ case SIPrefix::exa: return stream << 'E';
+ case SIPrefix::zetta: return stream << 'Z';
+ case SIPrefix::yotta: return stream << 'Y';
+
+ default: return stream;
+ }
+}
+
+int exponent(SIPrefix prefix)
+{
+ return 3 * (static_cast<int>(prefix) - static_cast<int>(SIPrefix::none));
+}
+
+static SIPrefix successor(SIPrefix prefix)
+{
+ assert(prefix != SIPrefix::yotta);
+ return static_cast<SIPrefix>(static_cast<int>(prefix) + 1);
+}
+
+// Insert the timestamp value into the stream in fixed-point notation
+// (and honor the precision)
+static QTextStream& operator<<(QTextStream& stream, const Timestamp& t)
+{
+ // The multiprecision types already have a function and a stream insertion
+ // operator to convert them to a string, however these functions abuse a
+ // precision value of zero to print all available decimal places instead of
+ // none, and the boost authors refuse to fix this because they don't want
+ // to break buggy code that relies on this bug.
+ // (https://svn.boost.org/trac/boost/ticket/10103)
+ // Therefore we have to work around the case where precision is zero.
+
+ int precision = stream.realNumberPrecision();
+
+ std::ostringstream ss;
+ ss << std::fixed;
+
+ if (stream.numberFlags() & QTextStream::ForceSign)
+ ss << std::showpos;
+
+ if (0 == precision)
+ ss << std::setprecision(1) << round(t);
+ else
+ ss << std::setprecision(precision) << t;
-QString format_time(double t, unsigned int prefix,
- unsigned int precision, bool sign)
+ std::string str(ss.str());
+ if (0 == precision) {
+ // remove the separator and the unwanted decimal place
+ str.resize(str.size() - 2);
+ }
+
+ return stream << QString::fromStdString(str);
+}
+
+QString format_time_si(
+ const Timestamp& v,
+ SIPrefix prefix,
+ unsigned int precision,
+ QString unit,
+ bool sign)
{
- assert(prefix < countof(SIPrefixes));
+ if (prefix == SIPrefix::unspecified) {
+ // No prefix given, calculate it
+
+ if (v.is_zero()) {
+ prefix = SIPrefix::none;
+ } else {
+ int exp = exponent(SIPrefix::yotta);
+ prefix = SIPrefix::yocto;
+ while ((fabs(v) * pow(Timestamp(10), exp)) > 999 &&
+ prefix < SIPrefix::yotta) {
+ prefix = successor(prefix);
+ exp -= 3;
+ }
+ }
+ }
- const double multiplier = pow(10.0,
- (int)- prefix * 3 - FirstSIPrefixPower);
+ assert(prefix >= SIPrefix::yocto);
+ assert(prefix <= SIPrefix::yotta);
+
+ const Timestamp multiplier = pow(Timestamp(10), -exponent(prefix));
QString s;
QTextStream ts(&s);
- if (sign) {
+ if (sign && !v.is_zero())
ts << forcesign;
- }
- ts << fixed << qSetRealNumberPrecision(precision)
- << (t * multiplier) << SIPrefixes[prefix] << "s";
+ ts
+ << qSetRealNumberPrecision(precision)
+ << (v * multiplier)
+ << ' '
+ << prefix
+ << unit;
return s;
}
-QString format_second(double second)
+QString format_time_si_adjusted(
+ const Timestamp& t,
+ SIPrefix prefix,
+ unsigned precision,
+ QString unit,
+ bool sign)
{
- unsigned int i = 0;
- int exp = - FirstSIPrefixPower;
+ // The precision is always given without taking the prefix into account
+ // so we need to deduct the number of decimals the prefix might imply
+ const int prefix_order = -exponent(prefix);
+
+ const unsigned int relative_prec =
+ (prefix >= SIPrefix::none) ? precision :
+ std::max((int)(precision - prefix_order), 0);
- while ((second * pow(10.0, exp)) > 999.0 && i < countof(SIPrefixes) - 1) {
- i++;
- exp -= 3;
+ return format_time_si(t, prefix, relative_prec, unit, sign);
+}
+
+
+// Helper for 'format_time_minutes()'.
+static QString pad_number(unsigned int number, int length)
+{
+ return QString("%1").arg(number, length, 10, QChar('0'));
+}
+
+QString format_time_minutes(const Timestamp& t, signed precision, bool sign)
+{
+ const Timestamp whole_seconds = floor(abs(t));
+ const Timestamp days = floor(whole_seconds / (60 * 60 * 24));
+ const unsigned int hours = fmod(whole_seconds / (60 * 60), 24).convert_to<uint>();
+ const unsigned int minutes = fmod(whole_seconds / 60, 60).convert_to<uint>();
+ const unsigned int seconds = fmod(whole_seconds, 60).convert_to<uint>();
+
+ QString s;
+ QTextStream ts(&s);
+
+ if (t < 0)
+ ts << "-";
+ else if (sign)
+ ts << "+";
+
+ bool use_padding = false;
+
+ // DD
+ if (days) {
+ ts << days.str().c_str() << ":";
+ use_padding = true;
}
- return format_time(second, i, 0, false);
+ // HH
+ if (hours || days) {
+ ts << pad_number(hours, use_padding ? 2 : 0) << ":";
+ use_padding = true;
+ }
+
+ // MM
+ ts << pad_number(minutes, use_padding ? 2 : 0);
+
+ ts << ":";
+
+ // SS
+ ts << pad_number(seconds, 2);
+
+ if (precision) {
+ ts << ".";
+
+ const Timestamp fraction = fabs(t) - whole_seconds;
+
+ std::ostringstream ss;
+ ss
+ << std::fixed
+ << std::setprecision(precision)
+ << std::setfill('0')
+ << fraction;
+ std::string fs = ss.str();
+
+ // Copy all digits, inserting spaces as unit separators
+ for (int i = 1; i <= precision; i++) {
+ // Start at index 2 to skip the "0." at the beginning
+ ts << fs.at(1 + i);
+
+ if ((i > 0) && (i % 3 == 0) && (i != precision))
+ ts << " ";
+ }
+ }
+
+ return s;
}
} // namespace util
projects / pulseview.git / blobdiff