external_libraries/yaml-cpp-0.3.0/src/streamcharsource.h

   1 #ifndef STREAMCHARSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
   2 #define STREAMCHARSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
   3
   4 #if defined(_MSC_VER) || (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
   5 #pragma once
   6 #endif
   7
   8
   9 #include "yaml-cpp/noncopyable.h"
  10 #include <cstddef>
  11
  12 namespace YAML
  13 {
  14         class StreamCharSource
  15         {
  16         public:
  17                 StreamCharSource(const Stream& stream): m_offset(0), m_stream(stream) {}
  18                 StreamCharSource(const StreamCharSource& source): m_offset(source.m_offset), m_stream(source.m_stream) {}
  19                 ~StreamCharSource() {}
  20
  21                 operator bool() const;
  22                 char operator [] (std::size_t i) const { return m_stream.CharAt(m_offset + i); }
  23                 bool operator !() const { return !static_cast<bool>(*this); }
  24
  25                 const StreamCharSource operator + (int i) const;
  26
  27         private:
  28                 std::size_t m_offset;
  29                 const Stream& m_stream;
  30
  31                 StreamCharSource& operator = (const StreamCharSource&); // non-assignable
  32         };
  33
  34         inline StreamCharSource::operator bool() const {
  35                 return m_stream.ReadAheadTo(m_offset);
  36         }
  37
  38         inline const StreamCharSource StreamCharSource::operator + (int i) const {
  39                 StreamCharSource source(*this);
  40                 if(static_cast<int> (source.m_offset) + i >= 0)
  41                         source.m_offset += i;
  42                 else
  43                         source.m_offset = 0;
  44                 return source;
  45         }
  46 }
  47
  48 #endif // STREAMCHARSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66