string_file.h

#pragma once
 
 
template < typename TYPE_CHAR >
class CLASS_DECL_ACME string_buffer
{
public:
 
   string_base < TYPE_CHAR >& m_str;
   char_pointer m_pszBuffer;
   character_count m_nLength;
   character_count m_nBufferLength;
 
   // Private copy constructor and copy assignment operator to prevent accidental use
 
   enum
   {
      AUTO_LENGTH = 0x01,  // Automatically determine the ___new length of the string at release.  The string must be nullptr-terminated.
      SET_LENGTH = 0x02  // set the length of the string matter at GetBuffer time
   };
 
   explicit string_buffer(string_base < TYPE_CHAR >& str) THROWS :
   m_str(str),
      m_pszBuffer(nullptr),
      m_nLength(str.length()),
      m_nBufferLength(str.length())
   {
 
      m_pszBuffer = m_str.GetBuffer();
 
   }
 
   string_buffer(string_base& str, character_count nMinLength, ::u32 dwFlags = AUTO_LENGTH) THROWS :
   m_str(str),
      m_pszBuffer(nullptr),
      m_nLength((dwFlags& AUTO_LENGTH) ? -1 : nMinLength),
      m_nBufferLength(nMinLength)
   {
 
      if (dwFlags & SET_LENGTH)
      {
 
         m_pszBuffer = m_str.get_buffer(nMinLength);
 
      }
      else
      {
 
         m_pszBuffer = m_str.GetBuffer(nMinLength);
 
      }
 
   }
 
 
   ~string_buffer()
   {
 
      m_str.ReleaseBuffer(m_nLength);
 
   }
 
 
   operator char_pointer () noexcept
   {
 
      return m_pszBuffer;
 
   }
 
 
   operator const_char_pointer () const noexcept
   {
 
      return m_pszBuffer;
   }
 
 
   inline void set_length(character_count nLength);
 
private:
 
   string_buffer(const string_buffer&) noexcept;
   string_buffer& operator=(const string_buffer&) noexcept;
 
};