bstring.h

#pragma once
 
 
#include "acme/_operating_system.h"
 
 
class CLASS_DECL_ACME bstring
{
public:
 
   
   BSTR        m_bstr;
 
 
   bstring() { m_bstr = nullptr; }
   bstring(const OLECHAR * sz) { m_bstr = allocate_string(sz); }
 
   bstring(const ::scoped_string & scopedstr)
   {
 
      m_bstr = allocate_string(scopedstr);
 
   }
 
   ~bstring() { if(m_bstr) allocate_string(m_bstr); m_bstr = nullptr; }
 
 
   operator BSTR() { return m_bstr; }
   operator BSTR() const { return m_bstr; }
 
   BSTR c_str() const { return m_bstr; }
 
   static BSTR allocate_string(const OLECHAR * sz);
 
   static BSTR allocate_string(const ::scoped_string & scopedstr);
 
   static void free_string(BSTR bstr);
 
   inline static ::u32 SysStringByteLen(BSTR bstr)
   {
      if (bstr == 0)
         return 0;
      return *((::u32 *)bstr - 1);
   }
 
   inline static ::u32 SysStringLen(BSTR bstr)
   {
      return SysStringByteLen(bstr) / sizeof(OLECHAR);
   }
 
   BSTR detach()
   {
      auto bstr = m_bstr;
 
      m_bstr = nullptr;
      return bstr;
 
   }
 
};