mgl_text_stream.h

[詳解]

// SPDX-License-Identifier: Zlib
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
 
#ifndef INCGUARD_MGL_TEXT_STREAM_H_1538586799
#define INCGUARD_MGL_TEXT_STREAM_H_1538586799
 
#include <cstddef>
 
#include <mgl/file/mgl_file_path_view.h>
#include <mgl/stl/mgl_stl_memory.h>
#include <mgl/text/mgl_text_character.h>
#include <mgl/text/mgl_text_defs.h>
 
namespace MGL::Text
{
class TextStream
{
public:
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    constexpr TextStream() noexcept = default;
 
    TextStream(const uint8_t *buffer, size_t size, Encoding encoding = Encoding::Auto, bool existBOM = false) noexcept;
 
    void Set(const uint8_t *buffer, size_t size, Encoding encoding = Encoding::Auto, bool existBOM = false) noexcept;
    bool Load(const File::PathView &filepath, Encoding encoding = Encoding::Auto) noexcept;
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] Encoding GetEncoding() const noexcept
    {
        return _encoding;
    }
 
    Character Read() noexcept;
 
    int Read(CharacterArray &array) noexcept;
    int ReadLine(CharacterArray &array) noexcept;
 
    void PrintInfo() const noexcept;
 
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] constexpr bool IsTerminated() const noexcept
    {
        return (_offset >= _size);
    }
 
private:
    Encoding CheckEncoding(bool &existBOM) const noexcept;
    [[nodiscard]] size_t GetStartOffset() const noexcept;
 
    Character ReadUTF8() noexcept;
    Character ReadUTF16() noexcept;
    Character ReadUTF32() noexcept;
 
    const uint8_t *_buffer{nullptr};
    size_t _size{0};
    Encoding _encoding{Encoding::Auto};
    size_t _offset{0};
    bool _existBOM{false};
    STL::unique_ptr<uint8_t[]> _loadBuffer{nullptr};
};
}    // namespace MGL::Text
 
 
#endif    // INCGUARD_MGL_TEXT_STREAM_H_1538586799
 
// vim: et ts=4 sw=4 sts=4