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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
View File

@ -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());

63
src/util/WritableBuffer.hxx
View File

@ -56,28 +56,29 @@ struct WritableBuffer<void> {
WritableBuffer() = default;
constexpr WritableBuffer(std::nullptr_t):data(nullptr), size(0) {}
constexpr WritableBuffer(std::nullptr_t) noexcept
:data(nullptr), size(0) {}
constexpr WritableBuffer(pointer_type _data, size_type _size)
constexpr WritableBuffer(pointer_type _data, size_type _size) noexcept
:data(_data), size(_size) {}
constexpr operator ConstBuffer<void>() const noexcept {
return {data, size};
}
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;
}
};
@ -103,19 +104,21 @@ struct WritableBuffer {
WritableBuffer() = default;
constexpr WritableBuffer(std::nullptr_t):data(nullptr), size(0) {}
constexpr WritableBuffer(std::nullptr_t) noexcept
:data(nullptr), size(0) {}
constexpr WritableBuffer(pointer_type _data, size_type _size)
constexpr WritableBuffer(pointer_type _data, size_type _size) noexcept
:data(_data), size(_size) {}
constexpr WritableBuffer(pointer_type _data, pointer_type _end)
constexpr WritableBuffer(pointer_type _data,
pointer_type _end) noexcept
:data(_data), size(_end - _data) {}
/**
* Convert array to WritableBuffer instance.
*/
template<size_type _size>
constexpr WritableBuffer(T (&_data)[_size])
constexpr WritableBuffer(T (&_data)[_size]) noexcept
:data(_data), size(_size) {}
constexpr operator ConstBuffer<T>() const noexcept {
@ -126,7 +129,7 @@ struct WritableBuffer {
* Cast a WritableBuffer<void> to a WritableBuffer<T>,
* rounding down to the next multiple of T's size.
*/
static constexpr WritableBuffer<T> FromVoidFloor(WritableBuffer<void> other) {
static constexpr WritableBuffer<T> FromVoidFloor(WritableBuffer<void> other) noexcept {
static_assert(sizeof(T) > 0, "Empty base type");
return WritableBuffer<T>(pointer_type(other.data),
other.size / sizeof(T));
@ -141,7 +144,7 @@ struct WritableBuffer {
#ifdef NDEBUG
constexpr
#endif
static WritableBuffer<T> FromVoid(WritableBuffer<void> other) {
static WritableBuffer<T> FromVoid(WritableBuffer<void> other) noexcept {
static_assert(sizeof(T) > 0, "Empty base type");
#ifndef NDEBUG
assert(other.size % sizeof(T) == 0);
@ -149,47 +152,47 @@ struct WritableBuffer {
return FromVoidFloor(other);
}
constexpr WritableBuffer<void> ToVoid() const {
constexpr WritableBuffer<void> ToVoid() const noexcept {
static_assert(sizeof(T) > 0, "Empty base type");
return WritableBuffer<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;
}
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
@ -204,7 +207,7 @@ struct WritableBuffer {
#ifdef NDEBUG
constexpr
#endif
reference_type front() const {
reference_type front() const noexcept {
#ifndef NDEBUG
assert(!empty());
#endif
@ -218,7 +221,7 @@ struct WritableBuffer {
#ifdef NDEBUG
constexpr
#endif
reference_type back() const {
reference_type back() const noexcept {
#ifndef NDEBUG
assert(!empty());
#endif
@ -229,7 +232,7 @@ struct WritableBuffer {
* 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 {
assert(!empty());
++data;
@ -240,7 +243,7 @@ struct WritableBuffer {
* 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 {
assert(!empty());
--size;
@ -250,13 +253,13 @@ struct WritableBuffer {
* 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
@ -269,7 +272,7 @@ struct WritableBuffer {
* 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());
@ -283,7 +286,7 @@ struct WritableBuffer {
* 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());