parse-tabular-mtw
wayland/433mhz-rf-module/parse-tabular-mtw
Splits string based on specified delimiter character. Corrected version of gabbapeople/uart-led-control/parse-tabular. In the original the name of the output in code (output_PRT) didn't match the name of the output pin (OUT).
parse-tabular-mtw
@/parse-tabular-mtw
Splits string based on specified delimiter character. Corrected version of gabbapeople/uart-led-control/parse-tabular. In the original the name of the output in code (output_PRT) didn't match the name of the output pin (OUT).
STRstring
A string line to be split.
Dbyte
Delimiter character.
IDXnumber
A number of the string line part to output. The numbering of the parts starts with 0.
OUTstring
A part of a splitted string line.
C++ implementation
class SplitCStringView : public ListView<char> {
public:
class Cursor : public detail::Cursor<char> {
public:
Cursor(Iterator<char>&& ptr, char del, int n)
: _ptr(std::move(ptr))
, _del(del)
, _n(n)
, _curn(0)
{
while (_curn < _n && isValid()) next();
}
bool isValid() const override {
return _curn <= _n && (bool)_ptr;
}
bool value(char* out) const override {
if (_curn > _n) return false;
return _ptr.value(out);
}
void next() override {
++_ptr;
char c;
while (_ptr.value(&c) && c == _del) {
++_curn;
++_ptr;
}
}
private:
Iterator<char> _ptr;
char _del;
int _n;
int _curn;
};
public:
SplitCStringView() { }
SplitCStringView(List<char> str, char del, int n)
: _str(str)
, _del(del)
, _n(n)
{ }
SplitCStringView& operator=(const SplitCStringView& rhs) {
_str = rhs._str;
_del = rhs._del;
_n = rhs._n;
return *this;
}
virtual Iterator<char> iterate() const override {
return Iterator<char>(new Cursor(_str.iterate(), _del, _n));
}
private:
friend class Cursor;
List<char> _str;
char _del;
int _n;
};
struct State {
SplitCStringView view;
};
{{ GENERATED_CODE }}
void evaluate(Context ctx) {
auto state = getState(ctx);
auto str = getValue<input_STR>(ctx);
auto num = getValue<input_IDX>(ctx);
auto del = getValue<input_D>(ctx);
state->view = SplitCStringView(str,del,num);
emitValue<output_OUT>(ctx,XString(&state->view));
}