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// Scintilla source code edit control
/** @file UniqueString.h
** Define UniqueString, a unique_ptr based string type for storage in containers
** and an allocator for UniqueString.
** Define UniqueStringSet which holds a set of strings, used to avoid holding many copies
** of font names.
**/
// Copyright 2017 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#ifndef UNIQUESTRING_H
#define UNIQUESTRING_H
namespace Scintilla {
constexpr bool IsNullOrEmpty(const char *text) noexcept {
return text == nullptr || *text == '\0';
}
using UniqueString = std::unique_ptr<const char[]>;
/// Equivalent to strdup but produces a std::unique_ptr<const char[]> allocation to go
/// into collections.
UniqueString UniqueStringCopy(const char *text);
// A set of strings that always returns the same pointer for each string.
class UniqueStringSet {
private:
std::vector<UniqueString> strings;
public:
UniqueStringSet();
// UniqueStringSet objects can not be copied.
UniqueStringSet(const UniqueStringSet &) = delete;
UniqueStringSet &operator=(const UniqueStringSet &) = delete;
// UniqueStringSet objects can be moved.
UniqueStringSet(UniqueStringSet &&) = default;
UniqueStringSet &operator=(UniqueStringSet &&) = default;
~UniqueStringSet();
void Clear() noexcept;
const char *Save(const char *text);
};
}
#endif
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