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

   1 #ifndef STRINGSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
   2 #define STRINGSOURCE_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 <cstddef>
  10
  11 namespace YAML
  12 {
  13         class StringCharSource
  14         {
  15         public:
  16                 StringCharSource(const char *str, std::size_t size): m_str(str), m_size(size), m_offset(0) {}
  17
  18                 operator bool() const { return m_offset < m_size; }
  19                 char operator [] (std::size_t i) const { return m_str[m_offset + i]; }
  20                 bool operator !() const { return !static_cast<bool>(*this); }
  21
  22                 const StringCharSource operator + (int i) const {
  23                         StringCharSource source(*this);
  24                         if(static_cast<int> (source.m_offset) + i >= 0)
  25                                 source.m_offset += i;
  26                         else
  27                                 source.m_offset = 0;
  28                         return source;
  29                 }
  30
  31                 StringCharSource& operator ++ () {
  32                         ++m_offset;
  33                         return *this;
  34                 }
  35
  36                 StringCharSource& operator += (std::size_t offset) {
  37                         m_offset += offset;
  38                         return *this;
  39                 }
  40         private:
  41                 const char *m_str;
  42                 std::size_t m_size;
  43                 std::size_t m_offset;
  44         };
  45 }
  46
  47 #endif // STRINGSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66