std_types.hpp

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#ifndef stdtypes_INCLUDE_ONCE
#define stdtypes_INCLUDE_ONCE

#include <vlCore/config.hpp>
#include <vlCore/checks.hpp>

namespace vl
{
  typedef char i8;
  typedef unsigned char u8;
  typedef short i16;
  typedef unsigned short u16;
  typedef int i32;
  typedef unsigned int u32;
  typedef long long i64;
  typedef unsigned long long u64;
  typedef float f32;
  typedef double f64;

  // trigonometric constants

  const double dPi = 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093845;
  const double dDEG_TO_RAD = dPi / 180.0;
  const double dRAD_TO_DEG = 180.0 / dPi;

  const float fPi = (float)3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093845;
  const float fDEG_TO_RAD = float(dPi / 180.0);
  const float fRAD_TO_DEG = float(180.0 / dPi);

  class degree;

  class radian
  {
  public:
    radian(real val): mValue(val) {}
    operator real() { return mValue; }
    operator degree();

  private:
    real mValue;
  };

  class degree
  {
  public:
    degree(real val): mValue(val) {}
    operator real() { return mValue; }
    operator radian();

  private:
    real mValue;
  };

  inline radian::operator degree() { return mValue*(real)dRAD_TO_DEG; }
  inline degree::operator radian() { return mValue*(real)dDEG_TO_RAD; }

  template<typename T>
  void swapBytes(T& value)
  {
    union
    {
      T* value;
      char* ptr;
    } u;
    u.value = &value;
    char* a = u.ptr;
    char* b = u.ptr + sizeof(T) - 1;
    while(a<b)
    {
      char tmp = *a;
      *a = *b;
      *b = tmp;
      ++a;
      --b;
    }
  }

  VL_COMPILE_TIME_CHECK( sizeof(i8)*8  == 8 );
  VL_COMPILE_TIME_CHECK( sizeof(u8)*8  == 8 );
  VL_COMPILE_TIME_CHECK( sizeof(i16)*8 == 16 );
  VL_COMPILE_TIME_CHECK( sizeof(u16)*8 == 16 );
  VL_COMPILE_TIME_CHECK( sizeof(i32)*8 == 32 );
  VL_COMPILE_TIME_CHECK( sizeof(u32)*8 == 32 );
  VL_COMPILE_TIME_CHECK( sizeof(i64)*8 == 64 );
  VL_COMPILE_TIME_CHECK( sizeof(u64)*8 == 64 );
  VL_COMPILE_TIME_CHECK( sizeof(f32)*8 == 32 );
  VL_COMPILE_TIME_CHECK( sizeof(f64)*8 == 64 );
}

#endif