TAO/tao/String_Traits_Base_T.h

   1 #ifndef guard_string_traits_base_hpp
   2 #define guard_string_traits_base_hpp
   3 /**
   4  * @file
   5  *
   6  * @brief Isolate the string_traits from the accidental differences
   7  * between wstring and string.
   8  *
   9  * @author Carlos O'Ryan
  10  */
  11
  12 #include "tao/String_Alloc.h"
  13 #include "ace/CDR_Stream.h"
  14
  15 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  16
  17 namespace TAO
  18 {
  19 template<typename charT>
  20 class String_Manager_T;
  21
  22 template<typename charT>
  23 class String_var;
  24
  25 template<typename charT>
  26 class String_out;
  27
  28 namespace details
  29 {
  30 template<typename charT>
  31 struct string_traits_base
  32 {
  33 };
  34
  35 template<>
  36 struct string_traits_base<char>
  37 {
  38   typedef char char_type;
  39   typedef TAO::String_var <char_type> string_var;
  40   typedef TAO::String_out <char_type> string_out;
  41   typedef TAO::String_Manager_T <char_type> string_mgr;
  42   typedef ACE_InputCDR::to_string to_type;
  43   typedef ACE_OutputCDR::from_string from_type;
  44
  45   inline static char_type * default_initializer()
  46   {
  47     return CORBA::string_dup("");
  48   }
  49
  50   inline static char_type * duplicate(char_type const * s)
  51   {
  52     return CORBA::string_dup(s);
  53   }
  54
  55   inline static void release(char_type * s)
  56   {
  57     CORBA::string_free(s);
  58   }
  59
  60   inline static char_type * allocate (CORBA::ULong len)
  61   {
  62     return CORBA::string_alloc (len);
  63   }
  64 };
  65
  66 template<>
  67 struct string_traits_base<CORBA::WChar>
  68 {
  69   typedef CORBA::WChar char_type;
  70   typedef TAO::String_var <char_type> string_var;
  71   typedef TAO::String_out <char_type> string_out;
  72   typedef TAO::String_Manager_T <char_type> string_mgr;
  73   typedef ACE_InputCDR::to_wstring to_type;
  74   typedef ACE_OutputCDR::from_wstring from_type;
  75
  76   inline static char_type * default_initializer()
  77   {
  78 #if defined(ACE_HAS_WCHAR) || defined(ACE_HAS_XPG4_MULTIBYTE_CHAR)
  79     return CORBA::wstring_dup(L"");
  80 #else
  81 //#warning "platform not configured with native wchar_t support"
  82 //    static CORBA::WChar empty[] = { 0 };
  83     CORBA::WChar empty[] = { 0 };
  84     return CORBA::wstring_dup(empty);
  85 #endif /* 0 */
  86   }
  87
  88   inline static char_type * duplicate(char_type const * s)
  89   {
  90     return CORBA::wstring_dup(s);
  91   }
  92
  93   inline static void release(char_type * s)
  94   {
  95     CORBA::wstring_free(s);
  96   }
  97
  98   inline static char_type * allocate (CORBA::ULong len)
  99   {
 100     return CORBA::wstring_alloc (len);
 101   }
 102 };
 103 } // namespace details
 104 } // namespace TAO
 105
 106 TAO_END_VERSIONED_NAMESPACE_DECL
 107
 108 #endif // guard_string_traits_base_hpp