+++ /dev/null
-//===-- Self contained ArrayRef type ----------------------------*- C++ -*-===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIBC_SRC_SUPPORT_CPP_ARRAYREF_H
-#define LLVM_LIBC_SRC_SUPPORT_CPP_ARRAYREF_H
-
-#include "array.h"
-#include "type_traits.h" // RemoveCVType
-
-#include <stddef.h> // For size_t.
-
-namespace __llvm_libc {
-namespace cpp {
-
-// The implementations of ArrayRef and MutableArrayRef in this file are based
-// on the implementations of the types with the same names in
-// llvm/ADT/ArrayRef.h. The implementations in this file are of a limited
-// functionality, but can be extended in an as needed basis.
-namespace internal {
-template <typename QualifiedT> class ArrayRefBase {
-public:
- using value_type = remove_cv_t<QualifiedT>;
- using pointer = value_type *;
- using const_pointer = const value_type *;
- using reference = value_type &;
- using const_reference = const value_type &;
- using iterator = const_pointer;
- using const_iterator = const_pointer;
- using size_type = size_t;
- using difference_type = ptrdiff_t;
-
- ArrayRefBase() = default;
-
- // Construct an ArrayRefBase from a single element.
- explicit ArrayRefBase(QualifiedT &OneElt) : Data(&OneElt), Length(1) {}
-
- // Construct an ArrayRefBase from a pointer and length.
- ArrayRefBase(QualifiedT *Data, size_t Length) : Data(Data), Length(Length) {}
-
- // Construct an ArrayRefBase from a range.
- ArrayRefBase(QualifiedT *Begin, QualifiedT *End)
- : Data(Begin), Length(End - Begin) {}
-
- // Construct an ArrayRefBase from a C array.
- template <size_t N>
- constexpr ArrayRefBase(QualifiedT (&Arr)[N]) : Data(Arr), Length(N) {}
-
- QualifiedT *data() const { return Data; }
- size_t size() const { return Length; }
-
- auto begin() const { return data(); }
- auto end() const { return data() + size(); }
-
- bool empty() const { return size() == 0; }
-
- auto &operator[](size_t Index) const { return data()[Index]; }
-
- // slice(n, m) - Chop off the first N elements of the array, and keep M
- // elements in the array.
- auto slice(size_t N, size_t M) const { return ArrayRefBase(data() + N, M); }
- // slice(n) - Chop off the first N elements of the array.
- auto slice(size_t N) const { return slice(N, size() - N); }
-
- // Drop the first \p N elements of the array.
- auto drop_front(size_t N = 1) const { return slice(N, size() - N); }
-
- // Drop the last \p N elements of the array.
- auto drop_back(size_t N = 1) const { return slice(0, size() - N); }
-
- // Return a copy of *this with only the first \p N elements.
- auto take_front(size_t N = 1) const {
- if (N >= size())
- return *this;
- return drop_back(size() - N);
- }
-
- // Return a copy of *this with only the last \p N elements.
- auto take_back(size_t N = 1) const {
- if (N >= size())
- return *this;
- return drop_front(size() - N);
- }
-
- // equals - Check for element-wise equality.
- bool equals(ArrayRefBase<QualifiedT> RHS) const {
- if (Length != RHS.Length)
- return false;
- auto First1 = begin();
- auto Last1 = end();
- auto First2 = RHS.begin();
- for (; First1 != Last1; ++First1, ++First2) {
- if (!(*First1 == *First2)) {
- return false;
- }
- }
- return true;
- }
-
-private:
- QualifiedT *Data = nullptr;
- size_t Length = 0;
-};
-} // namespace internal
-
-template <typename T> struct ArrayRef : public internal::ArrayRefBase<const T> {
-private:
- static_assert(is_same_v<T, remove_cv_t<T>>,
- "ArrayRef must have a non-const, non-volatile value_type");
- using Impl = internal::ArrayRefBase<const T>;
- using Impl::Impl;
-
-public:
- // Construct an ArrayRef from void * pointer.
- // |Length| is the byte length of the array pointed to by |Data|.
- ArrayRef(const void *Data, size_t Length)
- : Impl(reinterpret_cast<const T *>(Data), Length / sizeof(T)) {}
-
- // From array.
- template <size_t N> ArrayRef(const array<T, N> &Arr) : Impl(Arr.Data, N) {}
-};
-
-template <typename T>
-struct MutableArrayRef : public internal::ArrayRefBase<T> {
-private:
- static_assert(
- is_same_v<T, remove_cv_t<T>>,
- "MutableArrayRef must have a non-const, non-volatile value_type");
- using Impl = internal::ArrayRefBase<T>;
- using Impl::Impl;
-
-public:
- // Construct an ArrayRef from void * pointer.
- // |Length| is the byte length of the array pointed to by |Data|.
- MutableArrayRef(void *Data, size_t Length)
- : Impl(reinterpret_cast<T *>(Data), Length / sizeof(T)) {}
-
- // From array.
- template <size_t N> MutableArrayRef(array<T, N> &Arr) : Impl(Arr.Data, N) {}
-
- operator ArrayRef<T>() const {
- return ArrayRef<T>(this->data(), this->size());
- }
-};
-
-} // namespace cpp
-} // namespace __llvm_libc
-
-#endif // LLVM_LIBC_SRC_SUPPORT_CPP_ARRAYREF_H
+++ /dev/null
-//===-- Unittests for ArrayRef --------------------------------------------===//
-//
-// 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 "src/__support/CPP/ArrayRef.h"
-#include "utils/UnitTest/Test.h"
-
-namespace __llvm_libc {
-namespace cpp {
-
-// The following tests run on both 'ArrayRef' and 'MutableArrayRef'.
-using Types = testing::TypeList<ArrayRef<int>, MutableArrayRef<int>>;
-
-TYPED_TEST(LlvmLibcArrayRefTest, ConstructFromElement, Types) {
- using value_type = typename ParamType::value_type;
- using const_pointer = typename ParamType::const_pointer;
- value_type element = 5;
- ParamType arrayref(element);
- EXPECT_FALSE(arrayref.empty());
- EXPECT_EQ(arrayref.size(), size_t(1));
- EXPECT_EQ(arrayref[0], 5);
- EXPECT_EQ((const_pointer)arrayref.data(), (const_pointer)&element);
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, ConstructFromPointerAndSize, Types) {
- using value_type = typename ParamType::value_type;
- using const_pointer = typename ParamType::const_pointer;
- value_type values[] = {1, 2};
- ParamType arrayref(values, 2);
- EXPECT_FALSE(arrayref.empty());
- EXPECT_EQ(arrayref.size(), size_t(2));
- EXPECT_EQ(arrayref[0], 1);
- EXPECT_EQ(arrayref[1], 2);
- EXPECT_EQ((const_pointer)arrayref.data(), (const_pointer)values);
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, ConstructFromIterator, Types) {
- using value_type = typename ParamType::value_type;
- using const_pointer = typename ParamType::const_pointer;
- value_type values[] = {1, 2};
- ParamType arrayref(&values[0], &values[2]);
- EXPECT_FALSE(arrayref.empty());
- EXPECT_EQ(arrayref.size(), size_t(2));
- EXPECT_EQ(arrayref[0], 1);
- EXPECT_EQ(arrayref[1], 2);
- EXPECT_EQ((const_pointer)arrayref.data(), (const_pointer)&values[0]);
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, ConstructFromCArray, Types) {
- using value_type = typename ParamType::value_type;
- using const_pointer = typename ParamType::const_pointer;
- value_type values[] = {1, 2};
- ParamType arrayref(values);
- EXPECT_FALSE(arrayref.empty());
- EXPECT_EQ(arrayref.size(), size_t(2));
- EXPECT_EQ(arrayref[0], 1);
- EXPECT_EQ(arrayref[1], 2);
- EXPECT_EQ((const_pointer)arrayref.data(), (const_pointer)values);
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, ConstructFromLibcArray, Types) {
- using value_type = typename ParamType::value_type;
- using const_pointer = typename ParamType::const_pointer;
- array<value_type, 2> values = {1, 2};
- ParamType arrayref(values);
- EXPECT_FALSE(arrayref.empty());
- EXPECT_EQ(arrayref.size(), size_t(2));
- EXPECT_EQ(arrayref[0], 1);
- EXPECT_EQ(arrayref[1], 2);
- EXPECT_EQ((const_pointer)arrayref.data(), (const_pointer)values.data());
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, Equals, Types) {
- using value_type = typename ParamType::value_type;
- value_type values[] = {1, 2, 3};
- ParamType initial(values);
- EXPECT_TRUE(initial.equals(initial));
- ParamType shallow_copy(values);
- EXPECT_TRUE(initial.equals(shallow_copy));
- value_type same_values[] = {1, 2, 3};
- EXPECT_TRUE(initial.equals(same_values));
- value_type different_values[] = {1, 2, 4};
- EXPECT_FALSE(initial.equals(different_values));
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, SliceUnary, Types) {
- using value_type = typename ParamType::value_type;
- value_type values[] = {1, 2, 3};
- ParamType arrayref(values);
- {
- value_type values[] = {1, 2, 3};
- EXPECT_TRUE(arrayref.slice(0).equals(values));
- }
- {
- value_type values[] = {2, 3};
- EXPECT_TRUE(arrayref.slice(1).equals(values));
- }
- {
- value_type values[] = {3};
- EXPECT_TRUE(arrayref.slice(2).equals(values));
- }
- { EXPECT_TRUE(arrayref.slice(3).empty()); }
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, SliceBinary, Types) {
- using value_type = typename ParamType::value_type;
- value_type values[] = {1, 2, 3};
- ParamType arrayref(values);
- {
- EXPECT_TRUE(arrayref.slice(0, 0).empty());
- EXPECT_TRUE(arrayref.slice(1, 0).empty());
- EXPECT_TRUE(arrayref.slice(2, 0).empty());
- EXPECT_TRUE(arrayref.slice(3, 0).empty());
- }
- {
- value_type values[] = {1};
- EXPECT_TRUE(arrayref.slice(0, 1).equals(values));
- }
- {
- value_type values[] = {2};
- EXPECT_TRUE(arrayref.slice(1, 1).equals(values));
- }
- {
- value_type values[] = {3};
- EXPECT_TRUE(arrayref.slice(2, 1).equals(values));
- }
- {
- value_type values[] = {1, 2};
- EXPECT_TRUE(arrayref.slice(0, 2).equals(values));
- }
- {
- value_type values[] = {2, 3};
- EXPECT_TRUE(arrayref.slice(1, 2).equals(values));
- }
- {
- value_type values[] = {1, 2, 3};
- EXPECT_TRUE(arrayref.slice(0, 3).equals(values));
- }
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, DropFront, Types) {
- using value_type = typename ParamType::value_type;
- value_type values[] = {1, 2, 3};
- ParamType arrayref(values);
- {
- value_type values[] = {1, 2, 3};
- EXPECT_TRUE(arrayref.drop_front(0).equals(values));
- }
- {
- value_type values[] = {2, 3};
- EXPECT_TRUE(arrayref.drop_front(1).equals(values));
- }
- {
- value_type values[] = {3};
- EXPECT_TRUE(arrayref.drop_front(2).equals(values));
- }
- { EXPECT_TRUE(arrayref.drop_front(3).empty()); }
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, DropBack, Types) {
- using value_type = typename ParamType::value_type;
- value_type values[] = {1, 2, 3};
- ParamType arrayref(values);
- {
- value_type values[] = {1, 2, 3};
- EXPECT_TRUE(arrayref.drop_back(0).equals(values));
- }
- {
- value_type values[] = {1, 2};
- EXPECT_TRUE(arrayref.drop_back(1).equals(values));
- }
- {
- value_type values[] = {1};
- EXPECT_TRUE(arrayref.drop_back(2).equals(values));
- }
- { EXPECT_TRUE(arrayref.drop_back(3).empty()); }
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, TakeFront, Types) {
- using value_type = typename ParamType::value_type;
- value_type values[] = {1, 2, 3};
- ParamType arrayref(values);
- { EXPECT_TRUE(arrayref.take_front(0).empty()); }
- {
- value_type values[] = {1};
- EXPECT_TRUE(arrayref.take_front(1).equals(values));
- }
- {
- value_type values[] = {1, 2};
- EXPECT_TRUE(arrayref.take_front(2).equals(values));
- }
- {
- value_type values[] = {1, 2, 3};
- EXPECT_TRUE(arrayref.take_front(3).equals(values));
- }
-}
-
-TYPED_TEST(LlvmLibcArrayRefTest, TakeBack, Types) {
- using value_type = typename ParamType::value_type;
- value_type values[] = {1, 2, 3};
- ParamType arrayref(values);
- { EXPECT_TRUE(arrayref.take_back(0).empty()); }
- {
- value_type values[] = {3};
- EXPECT_TRUE(arrayref.take_back(1).equals(values));
- }
- {
- value_type values[] = {2, 3};
- EXPECT_TRUE(arrayref.take_back(2).equals(values));
- }
- {
- value_type values[] = {1, 2, 3};
- EXPECT_TRUE(arrayref.take_back(3).equals(values));
- }
-}
-
-TEST(LlvmLibcArrayRefTest, ConstructFromVoidPtr) {
- unsigned data[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
- void *ptr = data;
- const void *const_ptr = data;
- ArrayRef<unsigned> ref(const_ptr, sizeof(data));
- MutableArrayRef<unsigned> mutable_ref(ptr, sizeof(data));
- ASSERT_EQ(ref.size(), sizeof(data) / sizeof(unsigned));
- ASSERT_EQ(mutable_ref.size(), sizeof(data) / sizeof(unsigned));
-
- unsigned val = 123;
- for (size_t i = 0; i < sizeof(data) / sizeof(unsigned); ++i)
- mutable_ref[i] = val;
-
- for (size_t i = 0; i < sizeof(data) / sizeof(unsigned); ++i)
- ASSERT_EQ(ref[i], val);
-}
-
-} // namespace cpp
-} // namespace __llvm_libc
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