62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
#include "shared_string.hh"
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#include "buffer_utils.hh"
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#include <cstring>
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namespace Kakoune
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{
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StringDataPtr StringData::create(ArrayView<const StringView> strs)
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{
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const int len = accumulate(strs, 0, [](int l, StringView s) {
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return l + (int)s.length();
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});
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void* ptr = StringData::operator new(sizeof(StringData) + len + 1);
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auto* res = new (ptr) StringData(len);
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auto* data = reinterpret_cast<char*>(res + 1);
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for (auto& str : strs)
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{
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if (str.length() == 0) // memccpy(..., nullptr, 0) is UB
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continue;
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memcpy(data, str.begin(), (size_t)str.length());
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data += (int)str.length();
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}
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*data = 0;
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return RefPtr<StringData, PtrPolicy>{res};
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}
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StringDataPtr StringData::Registry::intern(StringView str)
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{
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auto it = m_strings.find(str);
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if (it != m_strings.end())
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return StringDataPtr{it->value};
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auto data = StringData::create(str);
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data->refcount |= interned_flag;
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m_strings.insert({data->strview(), data.get()});
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return data;
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}
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void StringData::Registry::remove(StringView str)
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{
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kak_assert(m_strings.contains(str));
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m_strings.unordered_remove(str);
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}
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void StringData::Registry::debug_stats() const
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{
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write_to_debug_buffer("Shared Strings stats:");
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size_t total_refcount = 0;
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size_t total_size = 0;
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size_t count = m_strings.size();
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for (auto& st : m_strings)
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{
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total_refcount += (st.value->refcount & refcount_mask) - 1;
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total_size += (int)st.value->length;
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}
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write_to_debug_buffer(format(" data size: {}, mean: {}", total_size, (float)total_size/count));
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write_to_debug_buffer(format(" refcounts: {}, mean: {}", total_refcount, (float)total_refcount/count));
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}
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}
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