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util/{Const,Writable}Buffer: add noexcept

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This commit is contained in:
Max Kellermann
2020-01-03 15:39:19 +01:00
parent 71ace2fbac
commit 4b0e288f00
2 changed files with 67 additions and 62 deletions
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66
src/util/ConstBuffer.hxx
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@@ -55,32 +55,33 @@ struct ConstBuffer<void> {
ConstBuffer() = default;
constexpr ConstBuffer(std::nullptr_t):data(nullptr), size(0) {}
constexpr ConstBuffer(std::nullptr_t) noexcept
:data(nullptr), size(0) {}
constexpr ConstBuffer(pointer_type _data, size_type _size)
constexpr ConstBuffer(pointer_type _data, size_type _size) noexcept
:data(_data), size(_size) {}
constexpr static ConstBuffer<void> FromVoid(ConstBuffer<void> other) {
constexpr static ConstBuffer<void> FromVoid(ConstBuffer<void> other) noexcept {
return other;
}
constexpr ConstBuffer<void> ToVoid() const {
constexpr ConstBuffer<void> ToVoid() const noexcept {
return *this;
}
constexpr bool IsNull() const {
constexpr bool IsNull() const noexcept {
return data == nullptr;
}
constexpr bool operator==(std::nullptr_t) const {
constexpr bool operator==(std::nullptr_t) const noexcept {
return data == nullptr;
}
constexpr bool operator!=(std::nullptr_t) const {
constexpr bool operator!=(std::nullptr_t) const noexcept {
return data != nullptr;
}
constexpr bool empty() const {
constexpr bool empty() const noexcept {
return size == 0;
}
};
@@ -104,26 +105,27 @@ struct ConstBuffer {
ConstBuffer() = default;
constexpr ConstBuffer(std::nullptr_t):data(nullptr), size(0) {}
constexpr ConstBuffer(std::nullptr_t) noexcept
:data(nullptr), size(0) {}
constexpr ConstBuffer(pointer_type _data, size_type _size)
constexpr ConstBuffer(pointer_type _data, size_type _size) noexcept
:data(_data), size(_size) {}
constexpr ConstBuffer(pointer_type _data, pointer_type _end)
constexpr ConstBuffer(pointer_type _data, pointer_type _end) noexcept
:data(_data), size(_end - _data) {}
/**
* Convert array to ConstBuffer instance.
*/
template<size_type _size>
constexpr ConstBuffer(const T (&_data)[_size])
constexpr ConstBuffer(const T (&_data)[_size]) noexcept
:data(_data), size(_size) {}
/**
* Cast a ConstBuffer<void> to a ConstBuffer<T>, rounding down
* to the next multiple of T's size.
*/
static constexpr ConstBuffer<T> FromVoidFloor(ConstBuffer<void> other) {
static constexpr ConstBuffer<T> FromVoidFloor(ConstBuffer<void> other) noexcept {
static_assert(sizeof(T) > 0, "Empty base type");
return ConstBuffer<T>(pointer_type(other.data),
other.size / sizeof(T));
@@ -138,7 +140,7 @@ struct ConstBuffer {
#ifdef NDEBUG
constexpr
#endif
static ConstBuffer<T> FromVoid(ConstBuffer<void> other) {
static ConstBuffer<T> FromVoid(ConstBuffer<void> other) noexcept {
static_assert(sizeof(T) > 0, "Empty base type");
#ifndef NDEBUG
assert(other.size % sizeof(T) == 0);
@@ -146,24 +148,24 @@ struct ConstBuffer {
return FromVoidFloor(other);
}
constexpr ConstBuffer<void> ToVoid() const {
constexpr ConstBuffer<void> ToVoid() const noexcept {
static_assert(sizeof(T) > 0, "Empty base type");
return ConstBuffer<void>(data, size * sizeof(T));
}
constexpr bool IsNull() const {
constexpr bool IsNull() const noexcept {
return data == nullptr;
}
constexpr bool operator==(std::nullptr_t) const {
constexpr bool operator==(std::nullptr_t) const noexcept {
return data == nullptr;
}
constexpr bool operator!=(std::nullptr_t) const {
constexpr bool operator!=(std::nullptr_t) const noexcept {
return data != nullptr;
}
constexpr bool empty() const {
constexpr bool empty() const noexcept {
return size == 0;
}
@@ -177,26 +179,26 @@ struct ConstBuffer {
return false;
}
constexpr iterator begin() const {
constexpr iterator begin() const noexcept {
return data;
}
constexpr iterator end() const {
constexpr iterator end() const noexcept {
return data + size;
}
constexpr const_iterator cbegin() const {
constexpr const_iterator cbegin() const noexcept {
return data;
}
constexpr const_iterator cend() const {
constexpr const_iterator cend() const noexcept {
return data + size;
}
#ifdef NDEBUG
constexpr
#endif
reference_type operator[](size_type i) const {
reference_type operator[](size_type i) const noexcept {
#ifndef NDEBUG
assert(i < size);
#endif
@@ -211,7 +213,7 @@ struct ConstBuffer {
#ifdef NDEBUG
constexpr
#endif
reference_type front() const {
reference_type front() const noexcept {
#ifndef NDEBUG
assert(!empty());
#endif
@@ -225,7 +227,7 @@ struct ConstBuffer {
#ifdef NDEBUG
constexpr
#endif
reference_type back() const {
reference_type back() const noexcept {
#ifndef NDEBUG
assert(!empty());
#endif
@@ -236,7 +238,7 @@ struct ConstBuffer {
* Remove the first element (by moving the head pointer, does
* not actually modify the buffer). Buffer must not be empty.
*/
void pop_front() {
void pop_front() noexcept {
#ifndef NDEBUG
assert(!empty());
#endif
@@ -249,7 +251,7 @@ struct ConstBuffer {
* Remove the last element (by moving the tail pointer, does
* not actually modify the buffer). Buffer must not be empty.
*/
void pop_back() {
void pop_back() noexcept {
#ifndef NDEBUG
assert(!empty());
#endif
@@ -261,13 +263,13 @@ struct ConstBuffer {
* Remove the first element and return a reference to it.
* Buffer must not be empty.
*/
reference_type shift() {
reference_type shift() noexcept {
reference_type result = front();
pop_front();
return result;
}
void skip_front(size_type n) {
void skip_front(size_type n) noexcept {
#ifndef NDEBUG
assert(size >= n);
#endif
@@ -280,7 +282,7 @@ struct ConstBuffer {
* Move the front pointer to the given address, and adjust the
* size attribute to retain the old end address.
*/
void MoveFront(pointer_type new_data) {
void MoveFront(pointer_type new_data) noexcept {
#ifndef NDEBUG
assert(IsNull() == (new_data == nullptr));
assert(new_data <= end());
@@ -294,7 +296,7 @@ struct ConstBuffer {
* Move the end pointer to the given address (by adjusting the
* size).
*/
void SetEnd(pointer_type new_end) {
void SetEnd(pointer_type new_end) noexcept {
#ifndef NDEBUG
assert(IsNull() == (new_end == nullptr));
assert(new_end >= begin());