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修复 kqm::basic_string::resize 与 reserve 的 bug

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keqingmoe 2025-03-15 00:25:54 +08:00
parent 1b1f8e6d0c
commit b2fd2c26cf
1 changed files with 7 additions and 14 deletions
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21
module/string.cppm
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@ -129,8 +129,8 @@ private:
other.mem_ = nullptr;
other.sso_ = {};
} else {
sso_.siz = other.sso_.siz;
memcpy(sso_.dat, other.sso_.dat, sso_.siz);
mem_ = nullptr;
sso_ = other.sso_;
}
}
@ -310,6 +310,7 @@ public:
auto buf = std::array<std::byte, 4uz>{};
auto last = utf::utf32_to_utf8(ch, buf.data());
replace_impl({pos.base(), 0uz}, {buf.data(), last});
return *this;
}
constexpr auto erase(iterator first, iterator last) & noexcept -> iterator
@ -475,22 +476,14 @@ public:
if (new_cap > max_size_bytes()) {
throw std::length_error{"new_cap > max_size_bytes()"};
}
auto [cap, mem, siz] = [this] {
if (mem_) {
return std::tuple{dyn_.cap, mem_, dyn_.siz};
} else {
return std::tuple{sso_size, sso_.dat, sso_.siz};
}
}();
if (new_cap < cap) return;
if (new_cap <= capacity()) return;
auto [new_mem, alloc_siz] = alloc_.allocate_at_least(new_cap);
std::memcpy(new_mem, mem, siz);
std::memcpy(new_mem, data(), size_bytes());
auto new_dyn = dyn_t{size_bytes(), alloc_siz};
if (mem_) {
alloc_.deallocate(mem_, dyn_.cap);
dyn_.cap = alloc_siz;
} else {
sso_.siz = alloc_siz;
}
dyn_ = new_dyn;
mem_ = new_mem;
}