* 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 <extdef.h>
-#include <assert.h>
-
#include <algorithm>
+#include <cassert>
+#include <sstream>
-#include <QTextStream>
#include <QDebug>
+#include <QTextStream>
+
+using std::fixed;
+using std::max;
+using std::ostringstream;
+using std::setfill;
+using std::setprecision;
+using std::showpos;
+using std::string;
using namespace Qt;
namespace pv {
namespace util {
-static const QString SIPrefixes[17] =
- {"y", "z", "a", "f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G",
- "T", "P", "E", "Z", "Y"};
-const int FirstSIPrefix = 8;
-const int FirstSIPrefixPower = -(FirstSIPrefix * 3);
+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();
+
+ ostringstream ss;
+ ss << fixed;
+
+ if (stream.numberFlags() & QTextStream::ForceSign)
+ ss << showpos;
+
+ if (0 == precision)
+ ss << setprecision(1) << round(t);
+ else
+ ss << setprecision(precision) << t;
-QString format_si_value(double v, QString unit, int prefix,
- unsigned int precision, bool sign)
+ 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)
{
- if (prefix < 0) {
- int exp = -FirstSIPrefixPower;
-
- prefix = 0;
- while ((fabs(v) * pow(10.0, exp)) > 999.0 &&
- prefix < (int)(countof(SIPrefixes) - 1)) {
- prefix++;
- exp -= 3;
+ 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;
+ }
}
}
- assert(prefix >= 0);
- assert(prefix < (int)countof(SIPrefixes));
+ assert(prefix >= SIPrefix::yocto);
+ assert(prefix <= SIPrefix::yotta);
- const double multiplier = pow(10.0,
- (int)- prefix * 3 - FirstSIPrefixPower);
+ 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) <<
- (v * multiplier) << " " << SIPrefixes[prefix] << unit;
+ ts << qSetRealNumberPrecision(precision) << (v * multiplier) << ' '
+ << prefix << unit;
return s;
}
+QString format_time_si_adjusted(const Timestamp& t, SIPrefix prefix,
+ unsigned precision, QString unit, bool sign)
+{
+ // 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 :
+ max((int)(precision - prefix_order), 0);
+
+ 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'));
}
-static QString format_time_in_full(double t, signed precision, bool force_sign)
+QString format_time_minutes(const Timestamp& t, signed precision, bool sign)
{
- const unsigned int whole_seconds = abs((int) t);
- const unsigned int days = whole_seconds / (60 * 60 * 24);
- const unsigned int hours = (whole_seconds / (60 * 60)) % 24;
- const unsigned int minutes = (whole_seconds / 60) % 60;
- const unsigned int seconds = whole_seconds % 60;
+ 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 (force_sign && (t >= 0))
- ts << "+";
if (t < 0)
ts << "-";
+ else if (sign)
+ ts << "+";
bool use_padding = false;
+ // DD
if (days) {
- ts << days << ":";
+ ts << days.str().c_str() << ":";
use_padding = true;
}
+ // HH
if (hours || days) {
ts << pad_number(hours, use_padding ? 2 : 0) << ":";
use_padding = true;
}
- if (minutes || hours || days) {
- ts << pad_number(minutes, use_padding ? 2 : 0);
- use_padding = true;
+ // MM
+ ts << pad_number(minutes, use_padding ? 2 : 0);
- // We're not showing any seconds with a negative precision
- if (precision >= 0)
- ts << ":";
- }
+ ts << ":";
- // precision < 0: Use DD:HH:MM format
- // precision = 0: Use DD:HH:MM:SS format
- // precision > 0: Use DD:HH:MM:SS.mmm nnn ppp fff format
- if (precision >= 0) {
- ts << pad_number(seconds, use_padding ? 2 : 0);
+ // SS
+ ts << pad_number(seconds, 2);
- const double fraction = fabs(t - whole_seconds);
+ if (precision) {
+ ts << ".";
- if (precision > 0 && precision < 1000) {
- QString fs = QString("%1").arg(fraction, -(2 + precision), 'f',
- precision, QChar('0'));
+ const Timestamp fraction = fabs(t) - whole_seconds;
- ts << ".";
+ ostringstream ss;
+ ss << fixed << setprecision(precision) << setfill('0') << fraction;
+ 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[1 + i];
+ // 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))
- ts << " ";
- }
+ if ((i > 0) && (i % 3 == 0) && (i != precision))
+ ts << " ";
}
}
return s;
}
-static QString format_time_with_si(double t, QString unit, int prefix,
- unsigned int precision, bool sign)
+/**
+ * Split a string into tokens at occurances of the separator.
+ *
+ * @param[in] text the input string to split
+ * @param[in] separator the delimiter between tokens
+ *
+ * @return a vector of broken down tokens
+ */
+vector<string> split_string(string text, string separator)
{
- // 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 =
- -(prefix * 3 + pv::util::FirstSIPrefixPower);
+ vector<string> result;
+ size_t pos;
- const unsigned int relative_prec =
- (prefix >= pv::util::FirstSIPrefix) ? precision :
- std::max((int)(precision - prefix_order), 0);
-
- return format_si_value(t, unit, prefix, relative_prec, sign);
-}
-
-QString format_time(double t, int prefix, TimeUnit unit,
- unsigned int precision, double step_size, bool sign)
-{
- // If we have to use samples then we have no alternative formats
- if (unit == Samples)
- return format_time_with_si(t, "sa", prefix, precision, sign);
-
- // View zoomed way out -> low precision (0), high step size (>=60s)
- // -> DD:HH:MM
- if ((precision == 0) && (step_size >= 60))
- return format_time_in_full(t, -1, sign);
-
- // View in "normal" range -> medium precision, medium step size
- // -> HH:MM:SS.mmm... or xxxx (si unit) if less than 60 seconds
- // View zoomed way in -> high precision (>3), low step size (<1s)
- // -> HH:MM:SS.mmm... or xxxx (si unit) if less than 60 seconds
- if (abs(t) < 60)
- return format_time_with_si(t, "s", prefix, precision, sign);
- else
- return format_time_in_full(t, precision, sign);
-}
+ while ((pos = text.find(separator)) != std::string::npos) {
+ result.push_back(text.substr(0, pos));
+ text = text.substr(pos + separator.length());
+ }
+ result.push_back(text);
-QString format_second(double second)
-{
- return format_si_value(second, "s", -1, 0, false);
+ return result;
}
} // namespace util
projects / pulseview.git / blobdiff