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extern/STLport/5.2.1/stlport/stl/char_traits.h

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+/*
+ * Copyright (c) 1996,1997
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Copyright (c) 1999
+ * Boris Fomitchev
+ *
+ * This material is provided "as is", with absolutely no warranty expressed
+ * or implied. Any use is at your own risk.
+ *
+ * Permission to use or copy this software for any purpose is hereby granted
+ * without fee, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ */
+
+#ifndef _STLP_CHAR_TRAITS_H
+#define _STLP_CHAR_TRAITS_H
+
+// Define char_traits
+
+#ifndef _STLP_INTERNAL_CSTDDEF
+#  include <stl/_cstddef.h>
+#endif
+
+#ifndef _STLP_INTERNAL_CSTRING
+#  include <stl/_cstring.h>
+#endif
+
+#if defined (__unix)
+#  include <sys/types.h>         // For off_t
+#endif /* __unix */
+
+#if defined (__BORLANDC__)
+#  include <mem.h>
+#  include <string.h>
+#  include <_stddef.h>
+#  include <sys/types.h>
+#endif
+
+#ifndef _STLP_INTERNAL_CONSTRUCT_H
+#  include <stl/_construct.h>
+#endif
+
+#ifndef _STLP_INTERNAL_CWCHAR
+#  include <stl/_cwchar.h>
+#endif
+
+_STLP_BEGIN_NAMESPACE
+
+template <class _Tp> class allocator;
+
+#define _STLP_NULL_CHAR_INIT(_ChT) _STLP_DEFAULT_CONSTRUCTED(_ChT)
+
+#if defined(_STLP_WCE)
+typedef long streamoff;
+#elif defined (_STLP_WIN32)
+#  if defined (_STLP_LONG_LONG) && !defined (__CYGWIN__)
+//The Win32 file io API support 64 bits access so streamoff and streamsize
+//has to reflect that. Do not change the stringbuf behavior.
+typedef _STLP_LONG_LONG streamoff;
+#  else
+typedef ptrdiff_t streamoff;
+#  endif
+#else // __unix
+#  ifdef _STLP_USE_DEFAULT_FILE_OFFSET
+typedef off_t streamoff;
+#  elif defined(_LARGEFILE_SOURCE) || defined(_LARGEFILE64_SOURCE) /* || defined(__USE_FILE_OFFSET64) */ \
+       /* || (defined(_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)) */ /* || defined (__sgi) && defined (_STLP_HAS_NO_NEW_C_HEADERS) */
+typedef off64_t streamoff;
+#  else
+typedef off_t streamoff;
+#  endif
+#endif /* __unix */
+
+#if defined (_STLP_WIN32)
+typedef streamoff streamsize;
+#else
+typedef ptrdiff_t streamsize;
+#endif
+
+// Class fpos, which represents a position within a file.  (The C++
+// standard calls for it to be defined in <ios>.  This implementation
+// moves it to <iosfwd>, which is included by <ios>.)
+template <class _StateT> class fpos {
+public:                         // From table 88 of the C++ standard.
+  fpos(streamoff __pos) : _M_pos(__pos), _M_st(_STLP_NULL_CHAR_INIT(_StateT)) {}
+  fpos() : _M_pos(0), _M_st(_STLP_NULL_CHAR_INIT(_StateT)) {}
+
+  operator streamoff() const { return _M_pos; }
+
+  bool operator==(const fpos& __y) const
+  { return _M_pos == __y._M_pos; }
+  bool operator!=(const fpos& __y) const
+  { return _M_pos != __y._M_pos; }
+
+  fpos& operator+=(streamoff __off) {
+    _M_pos += __off;
+    return *this;
+  }
+  fpos& operator-=(streamoff __off) {
+    _M_pos -= __off;
+    return *this;
+  }
+
+  fpos operator+(streamoff __off) {
+    fpos __tmp(*this);
+    __tmp += __off;
+    return __tmp;
+  }
+  fpos operator-(streamoff __off) {
+    fpos __tmp(*this);
+    __tmp -= __off;
+    return __tmp;
+  }
+
+public:                         // Manipulation of the state member.
+  _StateT state() const { return _M_st; }
+  void state(_StateT __st) { _M_st = __st; }
+private:
+  streamoff _M_pos;
+  _StateT _M_st;
+};
+
+typedef fpos<mbstate_t> streampos;
+typedef fpos<mbstate_t> wstreampos;
+
+// Class __char_traits_base.
+template <class _CharT, class _IntT>
+class __char_traits_base {
+public:
+  typedef _CharT char_type;
+  typedef _IntT int_type;
+  typedef streamoff off_type;
+  typedef streampos pos_type;
+  typedef mbstate_t state_type;
+
+  static void _STLP_CALL assign(char_type& __c1, const char_type& __c2) { __c1 = __c2; }
+  static bool _STLP_CALL eq(const char_type& __c1, const char_type& __c2)
+  { return __c1 == __c2; }
+  static bool _STLP_CALL lt(const char_type& __c1, const char_type& __c2)
+  { return __c1 < __c2; }
+
+  static int _STLP_CALL compare(const char_type* __s1, const char_type* __s2, size_t __n) {
+    for (size_t __i = 0; __i < __n; ++__i)
+      if (!eq(__s1[__i], __s2[__i]))
+        return __s1[__i] < __s2[__i] ? -1 : 1;
+    return 0;
+  }
+
+  static size_t _STLP_CALL length(const char_type* __s) {
+    const char_type _NullChar = _STLP_DEFAULT_CONSTRUCTED(char_type);
+    size_t __i(0);
+    for (; !eq(__s[__i], _NullChar); ++__i) {}
+    return __i;
+  }
+
+  static const char_type* _STLP_CALL find(const char_type* __s, size_t __n, const char_type& __c) {
+    for ( ; __n > 0 ; ++__s, --__n)
+      if (eq(*__s, __c))
+        return __s;
+    return 0;
+  }
+
+  static char_type* _STLP_CALL move(char_type* __s1, const char_type* __s2, size_t _Sz)
+  { return (_Sz == 0 ? __s1 : (char_type*)memmove(__s1, __s2, _Sz * sizeof(char_type))); }
+
+  static char_type* _STLP_CALL copy(char_type* __s1, const char_type* __s2, size_t __n) {
+    return (__n == 0 ? __s1 :
+      (char_type*)memcpy(__s1, __s2, __n * sizeof(char_type)));
+  }
+
+  static char_type* _STLP_CALL assign(char_type* __s, size_t __n, char_type __c) {
+    for (size_t __i = 0; __i < __n; ++__i)
+      __s[__i] = __c;
+    return __s;
+  }
+
+  static int_type _STLP_CALL not_eof(const int_type& __c)
+  { return !eq_int_type(__c, eof()) ? __c : __STATIC_CAST(int_type, 0); }
+
+  static char_type _STLP_CALL to_char_type(const int_type& __c)
+  { return (char_type)__c; }
+
+  static int_type _STLP_CALL to_int_type(const char_type& __c)
+  { return (int_type)__c; }
+
+  static bool _STLP_CALL eq_int_type(const int_type& __c1, const int_type& __c2)
+  { return __c1 == __c2; }
+
+  static int_type _STLP_CALL eof()
+  { return (int_type)-1; }
+};
+
+// Generic char_traits class.  Note that this class is provided only
+//  as a base for explicit specialization; it is unlikely to be useful
+//  as is for any particular user-defined type.  In particular, it
+//  *will not work* for a non-POD type.
+
+template <class _CharT>
+class char_traits
+  : public __char_traits_base<_CharT, _CharT> {};
+
+// Specialization for char.
+
+_STLP_TEMPLATE_NULL
+class _STLP_CLASS_DECLSPEC char_traits<char>
+  : public __char_traits_base<char, int>,
+    public __stlport_class<char_traits<char> > {
+public:
+  typedef char char_type;
+  typedef int int_type;
+  typedef streamoff off_type;
+  typedef streampos pos_type;
+  typedef mbstate_t state_type;
+
+  static char _STLP_CALL to_char_type(const int& __c)
+  { return (char)(unsigned char)__c; }
+
+  static int _STLP_CALL to_int_type(const char& __c)
+  { return (unsigned char)__c; }
+
+  static int _STLP_CALL compare(const char* __s1, const char* __s2, size_t __n)
+  { return memcmp(__s1, __s2, __n); }
+
+  static size_t _STLP_CALL length(const char* __s)
+  { return strlen(__s); }
+
+  static void _STLP_CALL assign(char& __c1, const char& __c2)
+  { __c1 = __c2; }
+
+  static char* _STLP_CALL assign(char* __s, size_t __n, char __c) {
+    memset(__s, __c, __n);
+    return __s;
+  }
+};
+
+#if defined (_STLP_HAS_WCHAR_T)
+// Specialization for wchar_t.
+_STLP_TEMPLATE_NULL
+class _STLP_CLASS_DECLSPEC char_traits<wchar_t>
+  : public __char_traits_base<wchar_t, wint_t> {
+#  if !defined (_STLP_NO_NATIVE_WIDE_FUNCTIONS) && !defined (_STLP_WCHAR_HPACC_EXCLUDE)
+public:
+#    if !defined (__BORLANDC__)
+  static wchar_t* _STLP_CALL move(wchar_t* __dest, const wchar_t* __src, size_t __n)
+  { return wmemmove(__dest, __src, __n); }
+#    endif
+
+  static wchar_t* _STLP_CALL copy(wchar_t* __dest, const wchar_t* __src, size_t __n)
+  { return wmemcpy(__dest, __src, __n); }
+
+#    if !defined (__DMC__) && !defined (__BORLANDC__)
+  static int _STLP_CALL compare(const wchar_t* __s1, const wchar_t* __s2, size_t __n)
+  { return wmemcmp(__s1, __s2, __n); }
+#    endif
+
+  static wchar_t* _STLP_CALL assign(wchar_t* __s, size_t __n, wchar_t __c)
+  { return wmemset(__s, __c, __n); }
+
+  static size_t _STLP_CALL length(const wchar_t* __s)
+  { return wcslen(__s); }
+
+  static void _STLP_CALL assign(wchar_t& __c1, const wchar_t& __c2)
+  { __c1 = __c2; }
+#  endif
+};
+#endif
+
+_STLP_END_NAMESPACE
+
+#endif /* _STLP_CHAR_TRAITS_H */
+
+// Local Variables:
+// mode:C++
+// End: