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//===-- runtime/support.cpp -----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "flang/Runtime/support.h"
#include "ISO_Fortran_util.h"
#include "type-info.h"
#include "flang/Runtime/descriptor.h"
namespace Fortran::runtime {
extern "C" {
RT_EXT_API_GROUP_BEGIN
bool RTDEF(IsContiguous)(const Descriptor &descriptor) {
return descriptor.IsContiguous();
}
bool RTDEF(IsAssumedSize)(const Descriptor &descriptor) {
return ISO::IsAssumedSize(&descriptor.raw());
}
void RTDEF(CopyAndUpdateDescriptor)(Descriptor &to, const Descriptor &from,
const typeInfo::DerivedType *newDynamicType,
ISO::CFI_attribute_t newAttribute, enum LowerBoundModifier newLowerBounds) {
to = from;
if (newDynamicType) {
DescriptorAddendum *toAddendum{to.Addendum()};
INTERNAL_CHECK(toAddendum);
toAddendum->set_derivedType(newDynamicType);
to.raw().elem_len = newDynamicType->sizeInBytes();
}
to.raw().attribute = newAttribute;
if (newLowerBounds != LowerBoundModifier::Preserve) {
const ISO::CFI_index_t newLowerBound{
newLowerBounds == LowerBoundModifier::SetToOnes ? 1 : 0};
const int rank{to.rank()};
for (int i = 0; i < rank; ++i) {
to.GetDimension(i).SetLowerBound(newLowerBound);
}
}
}
RT_EXT_API_GROUP_END
} // extern "C"
} // namespace Fortran::runtime
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