basic_string_stream.h

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/******************************************************************************
The MIT License(MIT)
 
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
 
Copyright(c) 2020 John Wellbelove
 
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#ifndef ETL_BASIC_STRING_STREAM_INCLUDED
#define ETL_BASIC_STRING_STREAM_INCLUDED

 
#include "platform.h"
#include "to_string.h"
#include "to_u16string.h"
#include "to_u32string.h"
#include "to_u8string.h"
#include "to_wstring.h"
 
namespace etl
{
  template <typename TFormat, typename TIString, typename TStringView>
  class basic_string_stream
  {
  public:
 
    typedef TFormat                          format_spec_type;
    typedef TIString                         istring_type;
    typedef typename TIString::value_type    value_type;
    typedef typename TIString::pointer       pointer;
    typedef typename TIString::const_pointer const_pointer;
 
    //*************************************************************************
    //*************************************************************************
    explicit basic_string_stream(TIString& text_)
      : text(text_)
    {
    }
 
    //*************************************************************************
    //*************************************************************************
    basic_string_stream(TIString& text_, const TFormat& spec_)
      : text(text_)
      , format(spec_)
    {
    }
 
    //*************************************************************************
    //*************************************************************************
    void set_format(const TFormat& spec_)
    {
      format = spec_;
    }
 
    //*************************************************************************
    //*************************************************************************
    const TFormat& get_format() const
    {
      return format;
    }
 
    //*************************************************************************
    //*************************************************************************
    TIString& str()
    {
      return text;
    }
 
    //*************************************************************************
    //*************************************************************************
    const TIString& str() const
    {
      return text;
    }
 
    //*************************************************************************
    //*************************************************************************
    void str(const value_type* p)
    {
      text.assign(p);
    }
 
    //*************************************************************************
    //*************************************************************************
    void str(const TIString& is)
    {
      text.assign(is);
    }
 
    //*************************************************************************
    //*************************************************************************
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, const TFormat& fmt)
    {
      ss.format = fmt;
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, etl::private_basic_format_spec::base_spec fmt)
    {
      ss.format.base(fmt.base);
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, etl::private_basic_format_spec::width_spec fmt)
    {
      ss.format.width(fmt.width);
      return ss;
    }
 
    //*********************************
    //*********************************
    template <typename TChar>
    friend basic_string_stream& operator<<(basic_string_stream& ss, etl::private_basic_format_spec::fill_spec<TChar> fmt)
    {
      ss.format.fill(fmt.fill);
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, etl::private_basic_format_spec::precision_spec fmt)
    {
      ss.format.precision(fmt.precision);
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, etl::private_basic_format_spec::boolalpha_spec fmt)
    {
      ss.format.boolalpha(fmt.boolalpha);
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, etl::private_basic_format_spec::uppercase_spec fmt)
    {
      ss.format.upper_case(fmt.upper_case);
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, etl::private_basic_format_spec::showbase_spec fmt)
    {
      ss.format.show_base(fmt.show_base);
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, etl::private_basic_format_spec::left_spec /*fmt*/)
    {
      ss.format.left();
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, etl::private_basic_format_spec::right_spec /*fmt*/)
    {
      ss.format.right();
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, TStringView view)
    {
      etl::to_string(view, ss.text, ss.format, true);
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, pointer p)
    {
      TStringView view(p);
      ss << view;
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, const_pointer p)
    {
      TStringView view(p);
      ss << view;
      return ss;
    }
 
    //*********************************
    //*********************************
    friend basic_string_stream& operator<<(basic_string_stream& ss, const TIString& t)
    {
      etl::to_string(t, ss.text, ss.format, true);
      return ss;
    }
 
    //*********************************
    //*********************************
    template <template <size_t> class TString, size_t SIZE>
    friend basic_string_stream& operator<<(basic_string_stream& ss, const TString<SIZE>& t)
    {
      const TIString& itext = t;
      etl::to_string(itext, ss.str(), ss.get_format(), true);
      return ss;
    }
 
    //*********************************
    //*********************************
    template <typename T>
    friend basic_string_stream& operator<<(basic_string_stream& ss, const T& value)
    {
      etl::to_string(value, ss.text, ss.format, true);
      return ss;
    }
 
  private:
 
    TIString& text;
    TFormat   format;
 
    basic_string_stream(const basic_string_stream&) ETL_DELETE;
    basic_string_stream& operator=(const basic_string_stream&) ETL_DELETE;
  };
} // namespace etl
 
#endif