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#include "Radio.hpp"
#include <cmath>
#include <limits>
#include <QString>
#include <QChar>
#include <QRegularExpression>
namespace Radio
{
namespace
{
double constexpr MHz_factor {1.e6};
int constexpr frequency_precsion {6};
// very loose validation - callsign must contain a letter next to
// a number
QRegularExpression valid_callsign_regexp {R"(\d[[:alpha:]]|[[:alpha:]]\d)"};
// suffixes that are often used and should not be interpreted as a
// DXCC Entity prefix used as a suffix
QRegularExpression non_prefix_suffix {R"(\A([0-9AMPQR]|QRP|F[DF]|[AM]M|L[HT]|LGT)\z)"};
}
Frequency frequency (QVariant const& v, int scale, bool * ok, QLocale const& locale)
{
double value {0.};
if (QVariant::String == v.type ())
{
value = locale.toDouble (v.value<QString> (), ok);
}
else
{
value = v.toDouble ();
if (ok) *ok = true;
}
value *= std::pow (10., scale);
if (ok)
{
if (value < 0. || value > std::numeric_limits<Frequency>::max ())
{
value = 0.;
*ok = false;
}
}
return std::llround (value);
}
FrequencyDelta frequency_delta (QVariant const& v, int scale, bool * ok, QLocale const& locale)
{
double value {0.};
if (QVariant::String == v.type ())
{
value = locale.toDouble (v.value<QString> (), ok);
}
else
{
value = v.toDouble ();
if (ok) *ok = true;
}
value *= std::pow (10., scale);
if (ok)
{
if (value < -std::numeric_limits<Frequency>::max ()
|| value > std::numeric_limits<Frequency>::max ())
{
value = 0.;
*ok = false;
}
}
return std::llround (value);
}
QString frequency_MHz_string (Frequency f, QLocale const& locale)
{
return locale.toString (f / MHz_factor, 'f', frequency_precsion);
}
QString frequency_MHz_string (FrequencyDelta d, QLocale const& locale)
{
return locale.toString (d / MHz_factor, 'f', frequency_precsion);
}
QString pretty_frequency_MHz_string (Frequency f, QLocale const& locale)
{
auto f_string = locale.toString (f / MHz_factor, 'f', frequency_precsion);
return f_string.insert (f_string.size () - 3, QChar::Nbsp);
}
QString pretty_frequency_MHz_string (double f, int scale, QLocale const& locale)
{
auto f_string = locale.toString (f / std::pow (10., scale - 6), 'f', frequency_precsion);
return f_string.insert (f_string.size () - 3, QChar::Nbsp);
}
QString pretty_frequency_MHz_string (FrequencyDelta d, QLocale const& locale)
{
auto d_string = locale.toString (d / MHz_factor, 'f', frequency_precsion);
return d_string.insert (d_string.size () - 3, QChar::Nbsp);
}
bool is_callsign (QString const& callsign)
{
return callsign.contains (valid_callsign_regexp);
}
bool is_compound_callsign (QString const& callsign)
{
return callsign.contains ('/');
}
// split on first '/' and return the larger portion or the whole if
// there is no '/'
QString base_callsign (QString callsign)
{
auto slash_pos = callsign.indexOf ('/');
if (slash_pos >= 0)
{
auto right_size = callsign.size () - slash_pos - 1;
if (right_size>= slash_pos)
{
callsign = callsign.mid (slash_pos + 1);
}
else
{
callsign = callsign.left (slash_pos);
}
}
return callsign.toUpper ();
}
// analyze the callsign and determine the effective prefix, returns
// the full call if no valid prefix (or prefix as a suffix) is specified
QString effective_prefix (QString callsign)
{
auto prefix = callsign.toUpper ();
auto slash_pos = callsign.indexOf ('/');
if (slash_pos >= 0)
{
auto right_size = callsign.size () - slash_pos - 1;
if (right_size >= slash_pos) // naive call is longer than
// prefix/suffix algorithm
{
prefix = callsign.left (slash_pos);
}
else
{
prefix = callsign.mid (slash_pos + 1);
if (prefix.contains (non_prefix_suffix))
{
prefix = callsign.left (slash_pos); // ignore
// non-prefix
// suffixes
}
}
}
return prefix;
}
}
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