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Pack and unpack directed message commands naively

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This commit is contained in:
Jordan Sherer 2018-07-13 04:42:23 -04:00
parent 8bc61902ac
commit 43b65d5ca9
2 changed files with 52 additions and 0 deletions
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50
varicode.cpp
View File

@ -358,3 +358,53 @@ QString Varicode::unpackCallsign(quint32 value){
return callsign;
}
QString Varicode::packDirectedMessage(const QString &text, int *n){
QString frame;
QString cmds("?$@&| ");
QRegularExpression r(R"((?<from>[A-Z0-9/]+):(?<to>[A-Z0-9/]+)(?<cmd>[?$@&| ]))");
auto match = r.match(text);
if(match.hasMatch()){
QString from = match.captured("from");
QString to = match.captured("to");
QString cmd = match.captured("cmd");
if(cmd.at(0) != '?'){
// this is the only allowed one at this point...
*n = 0;
return frame;
}
quint8 packed_flag = 0;
quint32 packed_from = Varicode::packCallsign(from);
quint32 packed_to = Varicode::packCallsign(to);
quint8 packed_cmd = cmds.indexOf(cmd.at(0));
// 3 + 28 + 28 + 5 = 64
auto bits = (
Varicode::intToBits(packed_flag, 3) +
Varicode::intToBits(packed_from, 28) +
Varicode::intToBits(packed_to, 28) +
Varicode::intToBits(packed_cmd & 7, 5)
);
frame = Varicode::pack64bits(Varicode::bitsToInt(bits));
*n = match.captured(0).length();
}
return frame;
}
QStringList Varicode::unpackDirectedMessage(const QString &text){
QStringList unpacked;
QString cmds("?$@&| ");
auto bits = Varicode::bitsToStr(Varicode::intToBits(Varicode::unpack64bits(text), 64));
quint8 flag = Varicode::bitsToInt(Varicode::strToBits(bits.left(3)));
quint32 packed_from = Varicode::bitsToInt(Varicode::strToBits(bits.mid(3, 28)));
quint32 packed_to = Varicode::bitsToInt(Varicode::strToBits(bits.mid(31, 28)));
quint8 packed_cmd = Varicode::bitsToInt(Varicode::strToBits(bits.mid(59, 5)));
unpacked.append(Varicode::unpackCallsign(packed_from));
unpacked.append(Varicode::unpackCallsign(packed_to));
unpacked.append(QString(cmds.at(packed_cmd & 7)));
return unpacked;
}

2
varicode.h
View File

@ -45,6 +45,8 @@ public:
static quint32 packCallsign(QString const& value);
static QString unpackCallsign(quint32 value);
static QString packDirectedMessage(QString const& text, int *n);
static QStringList unpackDirectedMessage(QString const& text);
};
#endif // VARICODE_H