jsonreader.h

// Name:        jsonreader.h
// Purpose:     the parser of JSON text
// Author:      Luciano Cattani
// Created:     2007/09/15
// Copyright:   (c) 2007 Luciano Cattani
// Licence:     wxWidgets licence
 
#ifndef WX_JSONREADER_H
#define WX_JSONREADER_H
 
// For compilers that support precompilation, includes "wx/wx.h".
#include <wx/wxprec.h>
 
// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWidgets headers)
#ifndef WX_PRECOMP
#include <wx/stream.h>
#include <wx/string.h>
#include <wx/arrstr.h>
#endif
 
#include "json_defs.h"
#include "jsonval.h"
 
// The flags of the parser
enum {
  wxJSONREADER_STRICT = 0,
  wxJSONREADER_ALLOW_COMMENTS = 1,
  wxJSONREADER_STORE_COMMENTS = 2,
  wxJSONREADER_CASE = 4,
  wxJSONREADER_MISSING = 8,
  wxJSONREADER_MULTISTRING = 16,
  wxJSONREADER_COMMENTS_AFTER = 32,
  wxJSONREADER_NOUTF8_STREAM = 64,
  wxJSONREADER_MEMORYBUFF = 128,
 
  wxJSONREADER_TOLERANT = wxJSONREADER_ALLOW_COMMENTS | wxJSONREADER_CASE |
                          wxJSONREADER_MISSING | wxJSONREADER_MULTISTRING,
  wxJSONREADER_COMMENTS_BEFORE =
      wxJSONREADER_ALLOW_COMMENTS | wxJSONREADER_STORE_COMMENTS
};
 
class WXDLLIMPEXP_JSON wxJSONReader {
public:
  wxJSONReader(int flags = wxJSONREADER_TOLERANT, int maxErrors = 30);
  virtual ~wxJSONReader();
 
  int Parse(const wxString& doc, wxJSONValue* val);
  int Parse(wxInputStream& doc, wxJSONValue* val);
 
  int GetDepth() const;
  int GetErrorCount() const;
  int GetWarningCount() const;
  const wxArrayString& GetErrors() const;
  const wxArrayString& GetWarnings() const;
 
  static int UTF8NumBytes(char ch);
 
#if defined(wxJSON_64BIT_INT)
  static bool Strtoll(const wxString& str, wxInt64* i64);
  static bool Strtoull(const wxString& str, wxUint64* ui64);
  static bool DoStrto_ll(const wxString& str, wxUint64* ui64, wxChar* sign);
#endif
 
protected:
  int DoRead(wxInputStream& doc, wxJSONValue& val);
  void AddError(const wxString& descr);
  void AddError(const wxString& fmt, const wxString& str);
  void AddError(const wxString& fmt, wxChar ch);
  void AddWarning(int type, const wxString& descr);
  int GetStart(wxInputStream& is);
  int ReadChar(wxInputStream& is);
  int PeekChar(wxInputStream& is);
  void StoreValue(int ch, const wxString& key, wxJSONValue& value,
                  wxJSONValue& parent);
  int SkipWhiteSpace(wxInputStream& is);
  int SkipComment(wxInputStream& is);
  void StoreComment(const wxJSONValue* parent);
  int ReadString(wxInputStream& is, wxJSONValue& val);
  int ReadToken(wxInputStream& is, int ch, wxString& s);
  int ReadValue(wxInputStream& is, int ch, wxJSONValue& val);
  int ReadUES(wxInputStream& is, char* uesBuffer);
  int AppendUES(wxMemoryBuffer& utf8Buff, const char* uesBuffer);
  int NumBytes(char ch);
  int ConvertCharByChar(wxString& s, const wxMemoryBuffer& utf8Buffer);
  int ReadMemoryBuff(wxInputStream& is, wxJSONValue& val);

  int m_flags;

  int m_maxErrors;

  int m_lineNo;

  int m_colNo;

  int m_level;

  int m_depth;

  wxJSONValue* m_current;

  wxJSONValue* m_lastStored;

  wxJSONValue* m_next;

  wxString m_comment;

  int m_commentLine;

  wxArrayString m_errors;

  wxArrayString m_warnings;

  int m_peekChar;

  bool m_noUtf8;
};
 
#endif  // WX_JSONREADER_H