- added implementation of stdc++ for haiku

- this differs slightly from the one that lives in buildtools/gcc as it
  has been "ported" to the newer libio that haiku uses as part of its own
  libroot


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9906 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/cpp/stl_tempbuf.h

@@ -0,0 +1,156 @@
+/*
+ *
+ * Copyright (c) 1994
+ * Hewlett-Packard Company
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Hewlett-Packard Company makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ *
+ * Copyright (c) 1996,1997
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Silicon Graphics makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ */
+
+/* NOTE: This is an internal header file, included by other STL headers.
+ *   You should not attempt to use it directly.
+ */
+
+#ifndef __SGI_STL_INTERNAL_TEMPBUF_H
+#define __SGI_STL_INTERNAL_TEMPBUF_H
+
+
+__STL_BEGIN_NAMESPACE
+
+template <class _Tp>
+pair<_Tp*, ptrdiff_t> 
+__get_temporary_buffer(ptrdiff_t __len, _Tp*)
+{
+  if (__len > ptrdiff_t(INT_MAX / sizeof(_Tp)))
+    __len = INT_MAX / sizeof(_Tp);
+
+  while (__len > 0) {
+    _Tp* __tmp = (_Tp*) malloc((size_t)__len * sizeof(_Tp));
+    if (__tmp != 0)
+      return pair<_Tp*, ptrdiff_t>(__tmp, __len);
+    __len /= 2;
+  }
+
+  return pair<_Tp*, ptrdiff_t>((_Tp*)0, 0);
+}
+
+#ifdef __STL_EXPLICIT_FUNCTION_TMPL_ARGS
+
+template <class _Tp>
+inline pair<_Tp*, ptrdiff_t> get_temporary_buffer(ptrdiff_t __len) {
+  return __get_temporary_buffer(__len, (_Tp*) 0);
+}
+
+#endif /* __STL_EXPLICIT_FUNCTION_TMPL_ARGS */
+
+// This overload is not required by the standard; it is an extension.
+// It is supported for backward compatibility with the HP STL, and
+// because not all compilers support the language feature (explicit
+// function template arguments) that is required for the standard
+// version of get_temporary_buffer.
+template <class _Tp>
+inline pair<_Tp*, ptrdiff_t> get_temporary_buffer(ptrdiff_t __len, _Tp*) {
+  return __get_temporary_buffer(__len, (_Tp*) 0);
+}
+
+template <class _Tp>
+void return_temporary_buffer(_Tp* __p) {
+  free(__p);
+}
+
+template <class _ForwardIterator, class _Tp>
+class _Temporary_buffer {
+private:
+  ptrdiff_t  _M_original_len;
+  ptrdiff_t  _M_len;
+  _Tp*       _M_buffer;
+
+  void _M_allocate_buffer() {
+    _M_original_len = _M_len;
+    _M_buffer = 0;
+
+    if (_M_len > (ptrdiff_t)(INT_MAX / sizeof(_Tp)))
+      _M_len = INT_MAX / sizeof(_Tp);
+
+    while (_M_len > 0) {
+      _M_buffer = (_Tp*) malloc(_M_len * sizeof(_Tp));
+      if (_M_buffer)
+        break;
+      _M_len /= 2;
+    }
+  }
+
+  void _M_initialize_buffer(const _Tp&, __true_type) {}
+  void _M_initialize_buffer(const _Tp& val, __false_type) {
+    uninitialized_fill_n(_M_buffer, _M_len, val);
+  }
+
+public:
+  ptrdiff_t size() const { return _M_len; }
+  ptrdiff_t requested_size() const { return _M_original_len; }
+  _Tp* begin() { return _M_buffer; }
+  _Tp* end() { return _M_buffer + _M_len; }
+
+  _Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) {
+    typedef typename __type_traits<_Tp>::has_trivial_default_constructor
+            _Trivial;
+    __STL_TRY {
+      _M_len = 0;
+      distance(__first, __last, _M_len);
+      _M_allocate_buffer();
+      if (_M_len > 0)
+        _M_initialize_buffer(*__first, _Trivial());
+    }
+    __STL_UNWIND(free(_M_buffer); _M_buffer = 0; _M_len = 0);
+  }
+ 
+  ~_Temporary_buffer() {  
+    destroy(_M_buffer, _M_buffer + _M_len);
+    free(_M_buffer);
+  }
+
+private:
+  // Disable copy constructor and assignment operator.
+  _Temporary_buffer(const _Temporary_buffer&) {}
+  void operator=(const _Temporary_buffer&) {}
+};
+
+// Class temporary_buffer is not part of the standard.  It is an extension.
+
+template <class _ForwardIterator, 
+          class _Tp 
+#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
+                    = typename iterator_traits<_ForwardIterator>::value_type
+#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
+         >
+struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp>
+{
+  temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
+    : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) {}
+  ~temporary_buffer() {}
+};
+    
+__STL_END_NAMESPACE
+
+#endif /* __SGI_STL_INTERNAL_TEMPBUF_H */
+
+// Local Variables:
+// mode:C++
+// End: