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Push more common AIS lat/lon formatting into common function.

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This commit is contained in:
Jared Boone 2016-01-15 15:59:04 -08:00
parent 8fa8a26298
commit cb5f563b92
1 changed files with 5 additions and 4 deletions
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9
firmware/application/ais_app.cpp
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@ -33,12 +33,13 @@ using namespace portapack;
namespace ais {
namespace format {
static std::string latlon_abs_normalized(const int32_t normalized) {
static std::string latlon_abs_normalized(const int32_t normalized, const char suffixes[2]) {
const auto suffix = suffixes[(normalized < 0) ? 0 : 1];
const uint32_t normalized_abs = std::abs(normalized);
const uint32_t t = (normalized_abs * 5) / 3;
const uint32_t degrees = t / (100 * 10000);
const uint32_t fraction = t % (100 * 10000);
return to_string_dec_uint(degrees) + "." + to_string_dec_uint(fraction, 6, '0');
return to_string_dec_uint(degrees) + "." + to_string_dec_uint(fraction, 6, '0') + suffix;
}
static std::string latitude(const Latitude value) {
@ -46,7 +47,7 @@ static std::string latitude(const Latitude value) {
return "not available";
} else if( value.is_valid() ) {
const auto normalized = value.normalized();
return latlon_abs_normalized(normalized) + ((normalized < 0) ? "S" : "N");
return latlon_abs_normalized(normalized, "SN");
} else {
return "invalid";
}
@ -57,7 +58,7 @@ static std::string longitude(const Longitude value) {
return "not available";
} else if( value.is_valid() ) {
const auto normalized = value.normalized();
return latlon_abs_normalized(normalized) + ((normalized < 0) ? "W" : "E");
return latlon_abs_normalized(normalized, "WE");
} else {
return "invalid";
}