text_reader.h

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#pragma once
 
#include <cstdio>
#include <istream>
#include <mutex>
#include <string>
#include "../core_export.h"
#include "../object.h"
#include "../ustring.h"
 
namespace xtd {
  namespace io {
    class null_text_reader;
    class synchronized_text_reader;
 
    class core_export_ text_reader : public object {
    public:
      static null_text_reader& null() noexcept;
      
      virtual void close();
      
      virtual int32_t peek() const;
      
      virtual int32_t read();
      
      virtual size_t read(std::vector<char>& buffer, size_t index, size_t count);
      
      virtual size_t read_block(std::vector<char>& buffer, size_t index, size_t count);
      
      virtual xtd::ustring read_line();
      
      virtual xtd::ustring read_to_end();
      
      static synchronized_text_reader synchronised(text_reader& reader) noexcept;
      
    protected:
      text_reader() = default;
    };
    
    class null_text_reader : public text_reader {
    public:
      int32_t read() override;
    };
    
    class synchronized_text_reader : public text_reader {
    public:
      int32_t read() override;
      
    private:
      friend class text_reader;
      explicit synchronized_text_reader(xtd::io::text_reader& reader);
      synchronized_text_reader() = delete;
      xtd::io::text_reader& reader_;
      std::mutex mutex_;
    };
  }
}