#include <assert.h>
+#include <algorithm>
+#include <sstream>
+
#include <QTextStream>
#include <QDebug>
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 FirstSIPrefixPower = -24;
+static const QString SIPrefixes[17] = {
+ "y", "z",
+ "a", "f", "p",
+ "n", QChar(0x03BC), "m",
+ "",
+ "k", "M", "G",
+ "T", "P", "E",
+ "Z", "Y"};
+const int EmptySIPrefix = 8;
+const int FirstSIPrefixPower = -(EmptySIPrefix * 3);
+
+// 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;
+ }
-QString format_si_value(double v, QString unit, int prefix,
+ if (0 == precision) {
+ ss
+ << std::setprecision(1)
+ << round(t);
+ } else {
+ ss
+ << std::setprecision(precision)
+ << t;
+ }
+
+ 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_si_value(const Timestamp& v, QString unit, int prefix,
unsigned int precision, 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;
+ // No prefix given, calculate it
+
+ if (v.is_zero()) {
+ prefix = EmptySIPrefix;
+ } else {
+ int exp = -FirstSIPrefixPower;
+
+ prefix = 0;
+ while ((fabs(v) * pow(10.0, exp)) > 999.0 &&
+ prefix < (int)(countof(SIPrefixes) - 1)) {
+ prefix++;
+ exp -= 3;
+ }
}
}
assert(prefix >= 0);
- assert(prefix < countof(SIPrefixes));
+ assert(prefix < (int)countof(SIPrefixes));
- const double multiplier = pow(10.0,
+ const Timestamp multiplier = pow(Timestamp(10),
(int)- prefix * 3 - FirstSIPrefixPower);
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)
+ << ' '
+ << SIPrefixes[prefix]
+ << unit;
return s;
}
-QString format_time(double t, int prefix,
- unsigned int precision, bool sign)
+static QString pad_number(unsigned int number, int length)
+{
+ return QString("%1").arg(number, length, 10, QChar('0'));
+}
+
+static QString format_time_in_full(const Timestamp& t, signed precision)
+{
+ 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
+ ts << "-";
+
+ bool use_padding = false;
+
+ if (days) {
+ ts << days.str().c_str() << ":";
+ use_padding = true;
+ }
+
+ 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;
+
+ // We're not showing any seconds with a negative precision
+ if (precision >= 0)
+ 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);
+
+ const Timestamp fraction = fabs(t) - whole_seconds;
+
+ if (precision > 0 && precision < 1000) {
+ std::ostringstream ss;
+ ss
+ << std::fixed
+ << std::setprecision(2 + precision)
+ << std::setfill('0')
+ << fraction;
+ std::string fs = ss.str();
+
+ ts << ".";
+
+ // 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];
+
+ if ((i > 0) && (i % 3 == 0) && (i != precision))
+ ts << " ";
+ }
+ }
+ }
+
+ return s;
+}
+
+static QString format_time_with_si(const Timestamp& t, QString unit,
+ int prefix, unsigned int precision)
+{
+ // 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);
+
+ const unsigned int relative_prec =
+ (prefix >= EmptySIPrefix) ? precision :
+ std::max((int)(precision - prefix_order), 0);
+
+ return format_si_value(t, unit, prefix, relative_prec);
+}
+
+QString format_time(const Timestamp& t, int prefix, TimeUnit unit,
+ unsigned int precision)
{
- return format_si_value(t, "s", prefix, precision, sign);
+ // Make 0 appear as 0, not random +0 or -0
+ if (t.is_zero())
+ return "0";
+
+ // If we have to use samples then we have no alternative formats
+ if (unit == Samples)
+ return format_time_with_si(t, "sa", prefix, precision);
+
+ // 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);
+ else
+ return format_time_in_full(t, precision);
}
-QString format_second(double second)
+QString format_second(const Timestamp& second)
{
return format_si_value(second, "s", -1, 0, false);
}
projects / pulseview.git / blobdiff