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