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1 files changed, 132 insertions, 0 deletions

diff --git a/include/cru/common/String.hpp b/include/cru/common/String.hpp
new file mode 100644
index 00000000..ea9480f0
--- /dev/null
+++ b/include/cru/common/String.hpp
@@ -0,0 +1,132 @@
+#pragma once
+
+#include <vcruntime.h>
+#include "Base.hpp"
+
+#include <cstdint>
+#include <iterator>
+
+namespace cru {
+class CRU_BASE_API String {
+ public:
+  static String fromUtf8(const char* str, Index size);
+
+  static String fromUtf16(const std::uint16_t* str) { return String(str); }
+  static String fromUtf16(const std::uint16_t* str, Index size) {
+    return String(str, size);
+  }
+
+  static String fromUtf16(const char16_t* str) { return String(str); }
+  static String fromUtf16(const char16_t* str, Index size) {
+    return String(str, size);
+  }
+
+#ifdef CRU_PLATFORM_WINDOWS
+  static String fromUtf16(wchar_t* str) { return String(str); }
+  static String fromUtf16(wchar_t* str, Index size) {
+    return String(str, size);
+  }
+#endif
+
+ public:
+  using value_type = std::uint16_t;
+  using size_type = Index;
+  using difference_type = Index;
+  using reference = std::uint16_t&;
+  using const_reference = const std::uint16_t&;
+  using pointer = std::uint16_t*;
+  using const_pointer = const std::uint16_t*;
+  using iterator = std::uint16_t*;
+  using const_iterator = const std::uint16_t*;
+  using reverse_iterator = std::reverse_iterator<iterator>;
+  using const_reverse_iterator = std::reverse_iterator<const_iterator>;
+
+ public:
+  String() = default;
+
+  String(const std::uint16_t* str);
+  String(const std::uint16_t* str, Index size);
+
+  String(const char16_t* str);
+  String(const char16_t* str, Index size);
+
+#ifdef CRU_PLATFORM_WINDOWS
+  String(const wchar_t* str);
+  String(const wchar_t* str, Index size);
+#endif
+
+  String(const String& other);
+  String(String&& other) noexcept;
+
+  String& operator=(const String& other);
+  String& operator=(String&& other) noexcept;
+
+  ~String();
+
+ public:
+  bool empty() const { return this->size_ == 0; }
+  Index size() const { return this->size_; }
+  Index length() const { return this->size(); }
+  Index capacity() const { return this->capacity_; }
+  std::uint16_t* data() { return this->buffer_; }
+
+  void reserve(Index new_capacity);
+
+  std::uint16_t& front() { return this->operator[](0); }
+  const std::uint16_t& front() const { return this->operator[](0); }
+
+  std::uint16_t& back() { return this->operator[](size_ - 1); }
+  const std::uint16_t& back() const { return this->operator[](size_ - 1); }
+
+  const std::uint16_t* c_str() const { return buffer_; }
+
+  std::uint16_t& operator[](Index index) { return buffer_[index]; }
+  const std::uint16_t& operator[](Index index) const { return buffer_[index]; }
+
+ public:
+  iterator begin() { return this->buffer_; }
+  const_iterator begin() const { return this->buffer_; }
+  const_iterator cbegin() const { return this->buffer_; }
+
+  iterator end() { return this->buffer_ + this->size_; }
+  const_iterator end() const { return this->buffer_ + this->size_; }
+  const_iterator cend() const { return this->buffer_ + this->size_; }
+
+  reverse_iterator rbegin() { return reverse_iterator{begin()}; }
+  const_reverse_iterator rbegin() const {
+    return const_reverse_iterator{begin()};
+  }
+  const_reverse_iterator crbegin() const {
+    return const_reverse_iterator{cbegin()};
+  }
+
+  reverse_iterator rend() { return reverse_iterator{end()}; }
+  const_reverse_iterator rend() const { return const_reverse_iterator{end()}; }
+  const_reverse_iterator crend() const {
+    return const_reverse_iterator{cend()};
+  }
+
+ public:
+  void clear();
+  iterator insert(const_iterator pos, std::uint16_t value) {
+    return this->insert(pos, &value, 1);
+  }
+  iterator insert(const_iterator pos, std::uint16_t* str, Index size);
+  iterator erase(const_iterator pos) { return this->erase(pos, pos + 1); }
+  iterator erase(const_iterator start, const_iterator end);
+  void push_back(std::uint16_t value) { this->append(value); }
+  void pop_back() { this->erase(cend() - 1); }
+  void append(std::uint16_t value) { this->insert(cend(), value); }
+  void append(std::uint16_t* str, Index size) {
+    this->insert(cend(), str, size);
+  }
+
+ private:
+  static std::uint16_t kEmptyBuffer[1];
+
+ private:
+  std::uint16_t* buffer_ = kEmptyBuffer;
+  Index size_ = 0;      // not including trailing '\0'
+  Index capacity_ = 0;  // always 1 smaller than real buffer size
+};
+}  // namespace cru