StreamUtils.h

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//  Copyright (C) 2020 Kuba Ober <kuba@mareimbrium.org>
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#ifndef WXMAXIMA_STREAMUTILS_H
#define WXMAXIMA_STREAMUTILS_H
 
#include <wx/stream.h>
#include <wx/string.h>
#include <vector>
 
class UTF8Decoder
{
public:
  struct DecodeResult
  {
    size_t bytesRead = {};
    size_t outputSize = {};
    const wxStringCharType *output = {};
    const wxStringCharType *outputEnd = {};
    bool ok = false;
  };
 
  class State
  {
    std::vector<char> m_inBuf;
    size_t m_inBufCount = {};
    std::vector<wxStringCharType> m_outBuf;
  public:
    DecodeResult Decode(wxInputStream &in, size_t maxRead, size_t maxWrite);
  };
 
  static DecodeResult Decode(State &state, wxInputStream &in, size_t maxRead,
                             size_t maxWrite)
  {
    return state.Decode(in, maxRead, maxWrite);
  }
};
 
#endif