static inline int nanoarrow_materialize_dbl()

in r/src/materialize_dbl.h [55:122]

• 54 lines of code
• 24 McCabe index (conditional complexity)

static inline int nanoarrow_materialize_dbl(struct RConverter* converter) {
  struct ArrayViewSlice* src = &converter->src;
  struct VectorSlice* dst = &converter->dst;
  double* result = REAL(dst->vec_sexp);

  // True for all the types supported here
  const uint8_t* is_valid = src->array_view->buffer_views[0].data.as_uint8;
  int64_t raw_src_offset = src->array_view->array->offset + src->offset;

  // Fill the buffer
  switch (src->array_view->storage_type) {
    case NANOARROW_TYPE_NA:
      for (R_xlen_t i = 0; i < dst->length; i++) {
        result[dst->offset + i] = NA_REAL;
      }
      break;
    case NANOARROW_TYPE_DOUBLE:
      memcpy(result + dst->offset,
             src->array_view->buffer_views[1].data.as_double + raw_src_offset,
             dst->length * sizeof(double));

      // Set any nulls to NA_REAL
      if (is_valid != NULL && src->array_view->array->null_count != 0) {
        for (R_xlen_t i = 0; i < dst->length; i++) {
          if (!ArrowBitGet(is_valid, raw_src_offset + i)) {
            result[dst->offset + i] = NA_REAL;
          }
        }
      }
      break;
    case NANOARROW_TYPE_BOOL:
    case NANOARROW_TYPE_INT8:
    case NANOARROW_TYPE_UINT8:
    case NANOARROW_TYPE_INT16:
    case NANOARROW_TYPE_UINT16:
    case NANOARROW_TYPE_INT32:
    case NANOARROW_TYPE_UINT32:
    case NANOARROW_TYPE_INT64:
    case NANOARROW_TYPE_UINT64:
    case NANOARROW_TYPE_FLOAT:
      // TODO: implement bounds check for int64 and uint64, but instead
      // of setting to NA, just warn (because sequential values might not
      // roundtrip above 2^51 ish)
      for (R_xlen_t i = 0; i < dst->length; i++) {
        result[dst->offset + i] =
            ArrowArrayViewGetDoubleUnsafe(src->array_view, src->offset + i);
      }

      // Set any nulls to NA_REAL
      if (is_valid != NULL && src->array_view->array->null_count != 0) {
        for (R_xlen_t i = 0; i < dst->length; i++) {
          if (!ArrowBitGet(is_valid, raw_src_offset + i)) {
            result[dst->offset + i] = NA_REAL;
          }
        }
      }
      break;

    case NANOARROW_TYPE_DECIMAL128:
      nanoarrow_materialize_decimal_to_dbl(converter);
      break;

    default:
      return EINVAL;
  }

  return NANOARROW_OK;
}