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hybrid_window.cpp
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hybrid_window.cpp
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#include "pch.h"
#include <dplyr/main.h>
#include <dplyr/HybridHandlerMap.h>
#include <dplyr/Result/ILazySubsets.h>
#include <dplyr/Result/Rank.h>
using namespace Rcpp;
using namespace dplyr;
Result* row_number_prototype(SEXP call, const ILazySubsets& subsets, int nargs) {
if (nargs > 1 || subsets.size() == 0) return 0;
if (nargs == 0) return new RowNumber_0();
RObject data(CADR(call));
if (TYPEOF(data) == LANGSXP && CAR(data) == Rf_install("desc")) {
data = CADR(data);
if (TYPEOF(data) == SYMSXP) {
SymbolString name = SymbolString(Symbol(data));
if (subsets.count(name)) data = subsets.get_variable(name);
else return 0;
}
if (Rf_length(data) == subsets.nrows()) {
switch (TYPEOF(data)) {
case INTSXP:
return new RowNumber<INTSXP, false>(data);
case REALSXP:
return new RowNumber<REALSXP, false>(data);
case STRSXP:
return new RowNumber<STRSXP, false>(data);
default:
break;
}
}
return 0;
}
if (TYPEOF(data) == SYMSXP) {
SymbolString name = SymbolString(Symbol(data));
if (subsets.count(name)) data = subsets.get_variable(name);
else return 0;
}
if (subsets.nrows() != Rf_length(data)) return 0;
switch (TYPEOF(data)) {
case INTSXP:
return new RowNumber<INTSXP, true>(data);
case REALSXP:
return new RowNumber<REALSXP, true>(data);
case STRSXP:
return new RowNumber<STRSXP, true>(data);
default:
break;
}
// we don't know how to handle it.
return 0;
}
Result* ntile_prototype(SEXP call, const ILazySubsets& subsets, int nargs) {
if (nargs != 2) return 0;
// handle 2nd arg
SEXP ntiles = CADDR(call);
if (TYPEOF(ntiles) != INTSXP && TYPEOF(ntiles) != REALSXP) return 0;
int number_tiles = as<int>(ntiles);
if (number_tiles == NA_INTEGER) return 0;
RObject data(CADR(call));
if (TYPEOF(data) == LANGSXP && CAR(data) == Rf_install("desc")) {
data = CADR(data);
if (TYPEOF(data) == SYMSXP) {
SymbolString name = SymbolString(Symbol(data));
if (subsets.count(name)) data = subsets.get_variable(name);
else return 0;
}
switch (TYPEOF(data)) {
case INTSXP:
return new Ntile<INTSXP, false>(data, number_tiles);
case REALSXP:
return new Ntile<REALSXP, false>(data, number_tiles);
case STRSXP:
return new Ntile<STRSXP, false>(data, number_tiles);
default:
break;
}
}
if (TYPEOF(data) == SYMSXP) {
SymbolString name = SymbolString(Symbol(data));
if (subsets.count(name)) data = subsets.get_variable(name);
else return 0;
}
if (subsets.nrows() != Rf_length(data)) return 0;
switch (TYPEOF(data)) {
case INTSXP:
return new Ntile<INTSXP, true>(data, number_tiles);
case REALSXP:
return new Ntile<REALSXP, true>(data, number_tiles);
case STRSXP:
return new Ntile<STRSXP, true>(data, number_tiles);
default:
break;
}
// we don't know how to handle it.
return 0;
}
template <typename Increment>
Result* rank_impl_prototype(SEXP call, const ILazySubsets& subsets, int nargs) {
if (nargs != 1) return 0;
RObject data(CADR(call));
if (TYPEOF(data) == LANGSXP && CAR(data) == Rf_install("desc")) {
data = CADR(data);
if (TYPEOF(data) == SYMSXP) {
SymbolString name = SymbolString(Symbol(data));
if (subsets.count(name)) data = subsets.get_variable(name);
else return 0;
}
switch (TYPEOF(data)) {
case INTSXP:
return new Rank_Impl<INTSXP, Increment, false>(data);
case REALSXP:
return new Rank_Impl<REALSXP, Increment, false>(data);
case STRSXP:
return new Rank_Impl<STRSXP, Increment, false>(data);
default:
break;
}
}
if (TYPEOF(data) == SYMSXP) {
SymbolString name = SymbolString(Symbol(data));
if (subsets.count(name)) data = subsets.get_variable(name);
else return 0;
}
if (subsets.nrows() != Rf_length(data)) return 0;
switch (TYPEOF(data)) {
case INTSXP:
return new Rank_Impl<INTSXP, Increment, true>(data);
case REALSXP:
return new Rank_Impl<REALSXP, Increment, true>(data);
case STRSXP:
return new Rank_Impl<STRSXP, Increment, true>(data);
default:
break;
}
// we don't know how to handle it.
return 0;
}
void install_window_handlers(HybridHandlerMap& handlers) {
handlers[ Rf_install("row_number") ] = row_number_prototype;
handlers[ Rf_install("ntile") ] = ntile_prototype;
handlers[ Rf_install("min_rank") ] = rank_impl_prototype<dplyr::internal::min_rank_increment>;
handlers[ Rf_install("percent_rank") ] = rank_impl_prototype<dplyr::internal::percent_rank_increment>;
handlers[ Rf_install("dense_rank") ] = rank_impl_prototype<dplyr::internal::dense_rank_increment>;
handlers[ Rf_install("cume_dist") ] = rank_impl_prototype<dplyr::internal::cume_dist_increment>;
}