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// *****************************************************************************
/*!
  \file      src/Base/Escaper.hpp
  \copyright 2012-2015 J. Bakosi,
             2016-2018 Los Alamos National Security, LLC.,
             2019-2021 Triad National Security, LLC.
             All rights reserved. See the LICENSE file for details.
  \brief     String escaper pulled over from PEGTL v0.32
  \details   String escaper pulled over from PEGTL v0.32 used to extract an
             std::string from pegtl::string.
*/
// *****************************************************************************
#ifndef Escaper_h
#define Escaper_h

#include <string><--- Include file:  not found. Please note: Cppcheck does not need standard library headers to get proper results.

namespace kw {

inline void escape_impl( std::string & result, const int i )
{
   switch ( i )
   {
      case '"':
         result += "\\\"";
         break;
      case '\\':
         result += "\\\\";
         break;
      case '\a':
         result += "\\a";
         break;
      case '\b':
         result += "\\b";
         break;
      case '\t':
         result += "\\t";
         break;
      case '\n':
         result += "\\n";
         break;
      case '\r':
         result += "\\r";
         break;
      case '\v':
         result += "\\v";
         break;
      case 32: case 33:          case 35: case 36: case 37: case 38: case 39:
      case 40: case 41: case 42: case 43: case 44: case 45: case 46: case 47: case 48: case 49:
      case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: case 58: case 59:
      case 60: case 61: case 62: case 63: case 64: case 65: case 66: case 67: case 68: case 69:
      case 70: case 71: case 72: case 73: case 74: case 75: case 76: case 77: case 78: case 79:
      case 80: case 81: case 82: case 83: case 84: case 85: case 86: case 87: case 88: case 89:
      case 90: case 91:          case 93: case 94: case 95: case 96: case 97: case 98: case 99:
      case 100: case 101: case 102: case 103: case 104: case 105: case 106: case 107: case 108: case 109:
      case 110: case 111: case 112: case 113: case 114: case 115: case 116: case 117: case 118: case 119:
      case 120: case 121: case 122: case 123: case 124: case 125: case 126:
         result += char( i );
         break;
      default: {
         char tmp[ 12 ];
         ::snprintf( tmp, sizeof( tmp ), "\\u%04x",
                     static_cast<unsigned int>( static_cast<unsigned char>( i ) ) );
         result += tmp;
      }  break;
   }
}

inline std::string escape( const int i )
{
   std::string nrv;
   escape_impl( nrv, i );
   return nrv;
}

inline std::string escape( const std::string & s )
{
   std::string nrv;

   for ( std::string::size_type i = 0; i < s.size(); ++i ) {
      escape_impl( nrv, s[ i ] );
   }
   return nrv;
}

template< int ... Cs > struct escaper;

template<>
struct escaper<>
{
   static std::string result()
   {
      return std::string();
   }
};

template< int C, int ... Cs >
struct escaper< C, Cs ... >
{
   static std::string result()
   {
      return escape( C ) + escaper< Cs ... >::result();
   }
};

} // ::kw

#endif // Escaper_h