// [[Rcpp::export]]
void doubleBM(const S4& BM, XPtr<BigMatrix> xpMat2) {
XPtr<BigMatrix> xpMat = BM.slot("address");
int n = xpMat->nrow();
int m = xpMat->ncol();
RawSubMatAcc macc(*xpMat, seq_len(n)-1, seq_len(m)-1, BM.slot("code"));
MatrixAccessor<unsigned char> macc2(*xpMat2);
int i, j, j2;
double tmp;
for (j = j2 = 0; j < m; j++, j2 += 2) {
for (i = 0; i < n; i++) {
tmp = macc(i, j);
if (tmp == 0) {
macc2[j2][i] = macc2[j2+1][i] = 0;
} else if (tmp == 1) {
macc2[j2][i] = 0;
macc2[j2+1][i] = 1;
} else if (tmp == 2) {
macc2[j2][i] = macc2[j2+1][i] = 1;
} else {
throw Rcpp::exception("Your big.matrix should have only Os, 1s or 2s");
}
}
}
}
// [[Rcpp::export]]
void fillMat(SEXP xptr_bed, Environment BM) {
XPtr<FBM> xpBM = BM["address"];
size_t n = xpBM->nrow();
size_t m = xpBM->ncol();
SubBMAcc<unsigned char> macc(xpBM, seq_len(n) - 1, seq_len(m) - 1);
XPtr<bed> xpBed(xptr_bed);
bedAcc bedacc(xpBed, seq_len(m));
for (size_t j = 0; j < m; j++) {
for (size_t i = 0; i < n; i++) {
macc(i, j) = bedacc(i, j);
}
}
}