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// Scintilla source code edit control
/** @file UniqueString.cxx
** Define an allocator for UniqueString.
**/
// Copyright 2017 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <string_view>
#include <vector>
#include <algorithm>
#include <memory>
#include "UniqueString.h"
namespace Scintilla::Internal {
/// Equivalent to strdup but produces a std::unique_ptr<const char[]> allocation to go
/// into collections.
UniqueString UniqueStringCopy(const char *text) {
if (!text) {
return UniqueString();
}
const std::string_view sv(text);
std::unique_ptr<char[]> upcNew = std::make_unique<char[]>(sv.length() + 1);
sv.copy(upcNew.get(), sv.length());
return UniqueString(upcNew.release());
}
// A set of strings that always returns the same pointer for each string.
UniqueStringSet::UniqueStringSet() = default;
UniqueStringSet::~UniqueStringSet() noexcept = default;
void UniqueStringSet::Clear() noexcept {
strings.clear();
}
const char *UniqueStringSet::Save(const char *text) {
if (!text)
return nullptr;
const std::string_view sv(text);
for (const UniqueString &us : strings) {
if (sv == us.get()) {
return us.get();
}
}
strings.push_back(UniqueStringCopy(text));
return strings.back().get();
}
}
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