#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 FirstSIPrefix = 8;
-const int FirstSIPrefixPower = -(FirstSIPrefix * 3);
+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);
const double MinTimeDelta = 1e-15; // Anything below 1 fs can be considered zero
-QString format_si_value(double v, QString unit, int prefix,
+// 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;
+ }
+
+ 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 < (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;
}
return QString("%1").arg(number, length, 10, QChar('0'));
}
-static QString format_time_in_full(double t, signed precision, bool force_sign)
+static QString format_time_in_full(double t, signed precision)
{
const unsigned int whole_seconds = abs((int) t);
const unsigned int days = whole_seconds / (60 * 60 * 24);
QString s;
QTextStream ts(&s);
- if (force_sign && (t >= 0))
+ if (t >= 0)
ts << "+";
- if (t < 0)
+ else
ts << "-";
bool use_padding = false;
}
static QString format_time_with_si(double t, QString unit, int prefix,
- unsigned int precision, bool sign)
+ 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
-(prefix * 3 + pv::util::FirstSIPrefixPower);
const unsigned int relative_prec =
- (prefix >= pv::util::FirstSIPrefix) ? precision :
+ (prefix >= EmptySIPrefix) ? precision :
std::max((int)(precision - prefix_order), 0);
- return format_si_value(t, unit, prefix, relative_prec, sign);
+ return format_si_value(t, unit, prefix, relative_prec);
}
-QString format_time(double t, int prefix, TimeUnit unit,
- unsigned int precision, double step_size, bool sign)
+static QString format_time(double t, int prefix, TimeUnit unit, unsigned int precision)
{
// Make 0 appear as 0, not random +0 or -0
if (fabs(t) < MinTimeDelta)
// 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);
+ 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, sign);
+ return format_time_with_si(t, "s", prefix, precision);
else
- return format_time_in_full(t, precision, sign);
+ return format_time_in_full(t, precision);
+}
+
+QString format_time(const Timestamp& t, int prefix, TimeUnit unit, unsigned int precision)
+{
+ return format_time(t.convert_to<double>(), prefix, unit, 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