mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-24 04:42:11 +00:00
347 lines
16 KiB
C++
347 lines
16 KiB
C++
/*
|
|
* Copyright (c) Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#pragma once
|
|
#include <vapours/common.hpp>
|
|
#include <vapours/assert.hpp>
|
|
|
|
namespace ams::util {
|
|
|
|
template<class _CharT, class _Traits = std::char_traits<_CharT>>
|
|
class basic_string_view {
|
|
static_assert(!std::is_array<_CharT>::value);
|
|
static_assert(std::is_trivial<_CharT>::value && std::is_standard_layout<_CharT>::value);
|
|
static_assert(std::same_as<_CharT, typename _Traits::char_type>);
|
|
public:
|
|
using traits_type = _Traits;
|
|
using value_type = _CharT;
|
|
using pointer = value_type *;
|
|
using const_pointer = const value_type *;
|
|
using reference = value_type &;
|
|
using const_reference = const value_type &;
|
|
using const_iterator = const value_type *;
|
|
using iterator = const_iterator;
|
|
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
|
|
using reverse_iterator = const_reverse_iterator;
|
|
using size_type = size_t;
|
|
using difference_type = ptrdiff_t;
|
|
static constexpr size_type npos = size_type(-1);
|
|
private:
|
|
static constexpr int _s_compare(size_type lhs, size_type rhs) noexcept {
|
|
const difference_type diff = lhs - rhs;
|
|
if (diff > std::numeric_limits<int>::max()) {
|
|
return std::numeric_limits<int>::max();
|
|
}
|
|
if (diff < std::numeric_limits<int>::min()) {
|
|
return std::numeric_limits<int>::min();
|
|
}
|
|
return static_cast<int>(diff);
|
|
}
|
|
private:
|
|
const_pointer m_str;
|
|
size_type m_len;
|
|
public:
|
|
constexpr basic_string_view() noexcept : m_str(nullptr), m_len(0) { /* ... */ }
|
|
constexpr basic_string_view(const _CharT *str, size_type len) noexcept : m_str(str), m_len(len) { /* ... */ }
|
|
constexpr basic_string_view(const _CharT *str) noexcept : m_str(str), m_len(str ? traits_type::length(str) : 0) { /* ... */ }
|
|
|
|
template<std::contiguous_iterator _It, std::sized_sentinel_for<_It> _End> requires std::same_as<std::iter_value_t<_It>, _CharT> && (!std::convertible_to<_End, size_type>)
|
|
constexpr basic_string_view(_It first, _End last) noexcept : m_str(std::to_address(first)), m_len(last - first) { /* ... */ }
|
|
|
|
constexpr basic_string_view(const basic_string_view &) noexcept = default;
|
|
constexpr basic_string_view &operator=(const basic_string_view &) noexcept = default;
|
|
|
|
constexpr const_iterator begin() const noexcept { return m_str; }
|
|
constexpr const_iterator end() const noexcept { return m_str + m_len; }
|
|
|
|
constexpr const_iterator cbegin() const noexcept { return m_str; }
|
|
constexpr const_iterator cend() const noexcept { return m_str + m_len; }
|
|
|
|
constexpr const_reverse_iterator rbegin() const noexcept { return const_reverse_iterator(this->end()); }
|
|
constexpr const_reverse_iterator rend() const noexcept { return const_reverse_iterator(this->begin()); }
|
|
|
|
constexpr const_reverse_iterator crbegin() const noexcept { return const_reverse_iterator(this->cend()); }
|
|
constexpr const_reverse_iterator crend() const noexcept { return const_reverse_iterator(this->cbegin()); }
|
|
|
|
constexpr size_type size() const noexcept { return m_len; }
|
|
constexpr size_type length() const noexcept { return m_len; }
|
|
|
|
constexpr size_type max_size() const noexcept { return (npos - sizeof(size_type) - sizeof(void *)) / sizeof(value_type) / 4; }
|
|
|
|
[[nodiscard]] constexpr bool empty() const noexcept { return m_len == 0; }
|
|
|
|
constexpr const_reference operator[](size_type pos) const noexcept {
|
|
AMS_ASSERT(pos < m_len);
|
|
return *(m_str + pos);
|
|
}
|
|
|
|
constexpr const_reference at(size_type pos) const noexcept {
|
|
AMS_ASSERT(pos < m_len);
|
|
AMS_ABORT_UNLESS(pos < m_len);
|
|
return *(m_str + pos);
|
|
}
|
|
|
|
constexpr const_reference front() const noexcept {
|
|
AMS_ASSERT(m_len > 0);
|
|
return *m_str;
|
|
}
|
|
|
|
constexpr const_reference back() const noexcept {
|
|
AMS_ASSERT(m_len > 0);
|
|
return *(m_str + m_len - 1);
|
|
}
|
|
|
|
constexpr const_pointer data() const noexcept { return m_str; }
|
|
|
|
constexpr void remove_prefix(size_type n) noexcept {
|
|
AMS_ASSERT(m_len >= n);
|
|
m_str += n;
|
|
m_len -= n;
|
|
}
|
|
|
|
constexpr void remove_suffix(size_type n) noexcept {
|
|
AMS_ASSERT(m_len >= n);
|
|
m_len -= n;
|
|
}
|
|
|
|
constexpr void swap(basic_string_view &rhs) noexcept {
|
|
auto tmp = *this;
|
|
*this = rhs;
|
|
rhs = tmp;
|
|
}
|
|
|
|
constexpr size_type copy(_CharT *str, size_type n, size_type pos = 0) const noexcept {
|
|
AMS_ASSERT(pos <= this->size());
|
|
const size_type rlen = std::min(n, m_len - pos);
|
|
traits_type::copy(str, this->data() + pos, rlen);
|
|
return rlen;
|
|
}
|
|
|
|
constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const noexcept {
|
|
AMS_ASSERT(pos <= this->size());
|
|
const size_type rlen = std::min(n, m_len - pos);
|
|
return basic_string_view{m_str + pos, rlen};
|
|
}
|
|
|
|
constexpr int compare(basic_string_view str) const noexcept {
|
|
const size_type rlen = std::min(m_len, str.m_len);
|
|
int ret = traits_type::compare(m_str, str.m_str, rlen);
|
|
if (ret == 0) {
|
|
ret = _s_compare(m_len, str.m_len);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
constexpr int compare(size_type pos, size_type n, basic_string_view str) const noexcept {
|
|
return this->substr(pos, n).compare(str);
|
|
}
|
|
|
|
constexpr int compare(size_type pos1, size_type n1, basic_string_view str, size_type pos2, size_type n2) const {
|
|
return this->substr(pos1, n1).compare(str.substr(pos2, n2));
|
|
}
|
|
|
|
constexpr int compare(const _CharT *str) const noexcept {
|
|
return this->compare(basic_string_view(str));
|
|
}
|
|
|
|
constexpr int compare(size_type pos, size_type n, const _CharT *str) const noexcept {
|
|
return this->substr(pos, n).compare(basic_string_view(str));
|
|
}
|
|
|
|
constexpr int compare(size_type pos, size_type n, const _CharT *str, size_type n2) const noexcept {
|
|
return this->substr(pos, n).compare(basic_string_view(str, n2));
|
|
}
|
|
|
|
constexpr bool starts_with(basic_string_view x) const noexcept { return this->substr(0, x.size()) == x; }
|
|
constexpr bool starts_with(_CharT x) const noexcept { return !this->empty() && traits_type::eq(this->front(), x); }
|
|
constexpr bool starts_with(const _CharT *x) const noexcept { return this->starts_with(basic_string_view(x)); }
|
|
|
|
constexpr bool ends_with(basic_string_view x) const noexcept { return this->size() >= x.size() && this->compare(this->size() - x.size(), npos, x) == 0; }
|
|
constexpr bool ends_with(_CharT x) const noexcept { return !this->empty() && traits_type::eq(this->back(), x); }
|
|
constexpr bool ends_with(const _CharT *x) const noexcept { return this->ends_with(basic_string_view(x)); }
|
|
|
|
constexpr size_type find(const _CharT *str, size_type pos, size_type n) const noexcept {
|
|
if (n == 0) {
|
|
return pos + m_len ? pos : npos;
|
|
}
|
|
|
|
if (n <= m_len) {
|
|
for (/* ... */; pos <= m_len - n; ++pos) {
|
|
if (traits_type::eq(m_str[pos], str[0]) && traits_type::compare(m_str + pos + 1, str + 1, n - 1) == 0) {
|
|
return pos;
|
|
}
|
|
}
|
|
}
|
|
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type find(_CharT c, size_type pos = 0) const noexcept {
|
|
size_type ret = npos;
|
|
if (pos < m_len) {
|
|
const size_type n = m_len - pos;
|
|
if (const _CharT *p = traits_type::find(m_str + pos, n, c); p) {
|
|
ret = p - m_str;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
constexpr size_type find(basic_string_view str, size_type pos = 0) const noexcept { return this->find(str.m_str, pos, str.m_len); }
|
|
|
|
__attribute__((nonnull(1)))
|
|
constexpr size_type find(const _CharT *str, size_type pos = 0) const noexcept { return this->find(str, pos, traits_type::length(str)); }
|
|
|
|
constexpr size_type rfind(const _CharT *str, size_type pos, size_type n) const noexcept {
|
|
if (n <= m_len) {
|
|
pos = std::min(size_type(m_len - n), pos);
|
|
do {
|
|
if (traits_type::compare(m_str + pos, str, n) == 0) {
|
|
return pos;
|
|
}
|
|
} while (pos-- > 0);
|
|
}
|
|
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type rfind(_CharT c, size_type pos = 0) const noexcept {
|
|
size_type size = m_len;
|
|
if (size > 0) {
|
|
if (--size > pos) {
|
|
size = pos;
|
|
}
|
|
for (++size; size-- > 0; /* ... */) {
|
|
if (traits_type::eq(m_str[size], c)) {
|
|
return size;
|
|
}
|
|
}
|
|
}
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type rfind(basic_string_view str, size_type pos = 0) const noexcept { return this->rfind(str.m_str, pos, str.m_len); }
|
|
|
|
__attribute__((nonnull(1)))
|
|
constexpr size_type rfind(const _CharT *str, size_type pos = 0) const noexcept { return this->rfind(str, pos, traits_type::length(str)); }
|
|
|
|
constexpr size_type find_first_of(const _CharT *str, size_type pos, size_t n) const noexcept {
|
|
for (/* ... */; n && pos < m_len; ++pos) {
|
|
if (const _CharT *p = traits_type::find(str, n, m_str[pos]); p) {
|
|
return pos;
|
|
}
|
|
}
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type find_first_of(basic_string_view str, size_type pos = 0) const noexcept { return this->find_first_of(str.m_str, pos, str.m_len); }
|
|
constexpr size_type find_first_of(_CharT c, size_type pos = 0) const noexcept { return this->find(c, pos); }
|
|
|
|
__attribute__((nonnull(1)))
|
|
constexpr size_type find_first_of(const _CharT *str, size_type pos = 0) const noexcept { return this->find_first_of(str, pos, traits_type::length(str)); }
|
|
|
|
constexpr size_type find_last_of(const _CharT *str, size_type pos, size_t n) const noexcept {
|
|
size_type size = this->size();
|
|
if (size && n) {
|
|
if (--size > pos) {
|
|
size = pos;
|
|
}
|
|
do {
|
|
if (traits_type::find(str, n, m_str[size])) {
|
|
return size;
|
|
}
|
|
} while (size-- != 0);
|
|
}
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type find_last_of(basic_string_view str, size_type pos = 0) const noexcept { return this->find_last_of(str.m_str, pos, str.m_len); }
|
|
constexpr size_type find_last_of(_CharT c, size_type pos = 0) const noexcept { return this->rfind(c, pos); }
|
|
|
|
__attribute__((nonnull(1)))
|
|
constexpr size_type find_last_of(const _CharT *str, size_type pos = 0) const noexcept { return this->find_first_of(str, pos, traits_type::length(str)); }
|
|
|
|
constexpr size_type find_first_not_of(const _CharT *str, size_type pos, size_t n) const noexcept {
|
|
for (/* ... */; pos < m_len; ++pos) {
|
|
if (!traits_type::find(str, n, m_str[pos])) {
|
|
return pos;
|
|
}
|
|
}
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type find_first_not_of(_CharT c, size_type pos = 0) const noexcept {
|
|
for (/* ... */; pos < m_len; ++pos) {
|
|
if (!traits_type::eq(m_str[pos], c)) {
|
|
return pos;
|
|
}
|
|
}
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type find_first_not_of(basic_string_view str, size_type pos = 0) const noexcept { return this->find_first_not_of(str.m_str, pos, str.m_len); }
|
|
|
|
__attribute__((nonnull(1)))
|
|
constexpr size_type find_first_not_of(const _CharT *str, size_type pos = 0) const noexcept { return this->find_first_not_of(str, pos, traits_type::length(str)); }
|
|
|
|
constexpr size_type find_last_not_of(const _CharT *str, size_type pos, size_t n) const noexcept {
|
|
size_type size = this->size();
|
|
if (size) {
|
|
if (--size > pos) {
|
|
size = pos;
|
|
}
|
|
do {
|
|
if (!traits_type::find(str, n, m_str[size])) {
|
|
return size;
|
|
}
|
|
} while (size-- != 0);
|
|
}
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type find_last_not_of(_CharT c, size_type pos = 0) const noexcept {
|
|
size_type size = this->size();
|
|
if (size) {
|
|
if (--size > pos) {
|
|
size = pos;
|
|
}
|
|
do {
|
|
if (!traits_type::eq(m_str[size], c)) {
|
|
return size;
|
|
}
|
|
} while (size-- != 0);
|
|
}
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type find_last_not_of(basic_string_view str, size_type pos = 0) const noexcept { return this->find_last_not_of(str.m_str, pos, str.m_len); }
|
|
|
|
__attribute__((nonnull(1)))
|
|
constexpr size_type find_last_not_of(const _CharT *str, size_type pos = 0) const noexcept { return this->find_last_not_of(str, pos, traits_type::length(str)); }
|
|
|
|
constexpr friend bool operator==(const basic_string_view &lhs, const basic_string_view &rhs) noexcept { return lhs.compare(rhs) == 0; }
|
|
constexpr friend bool operator!=(const basic_string_view &lhs, const basic_string_view &rhs) noexcept { return lhs.compare(rhs) != 0; }
|
|
constexpr friend bool operator<=(const basic_string_view &lhs, const basic_string_view &rhs) noexcept { return lhs.compare(rhs) <= 0; }
|
|
constexpr friend bool operator>=(const basic_string_view &lhs, const basic_string_view &rhs) noexcept { return lhs.compare(rhs) >= 0; }
|
|
constexpr friend bool operator< (const basic_string_view &lhs, const basic_string_view &rhs) noexcept { return lhs.compare(rhs) < 0; }
|
|
constexpr friend bool operator> (const basic_string_view &lhs, const basic_string_view &rhs) noexcept { return lhs.compare(rhs) > 0; }
|
|
};
|
|
|
|
template<std::contiguous_iterator _It, std::sized_sentinel_for<_It> _End>
|
|
basic_string_view(_It, _End) -> basic_string_view<std::iter_value_t<_It>>;
|
|
|
|
using string_view = basic_string_view<char>;
|
|
|
|
}
|