Add STLport 5.1.4

[polintos/scott/priv.git] / include / c++ / stl / stl / _tempbuf.h

diff --git a/include/c++/stl/stl/_tempbuf.h b/include/c++/stl/stl/_tempbuf.h
new file mode 100644 (file)
index 0000000..b50e6d4
--- /dev/null
+++ b/include/c++/stl/stl/_tempbuf.h
@@ -0,0 +1,167 @@
+/*
+ *
+ * Copyright (c) 1994
+ * Hewlett-Packard Company
+ *
+ * Copyright (c) 1996,1997
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Copyright (c) 1997
+ * Moscow Center for SPARC Technology
+ *
+ * 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.
+ *
+ */
+
+/* NOTE: This is an internal header file, included by other STL headers.
+ *   You should not attempt to use it directly.
+ */
+
+#ifndef _STLP_INTERNAL_TEMPBUF_H
+#define _STLP_INTERNAL_TEMPBUF_H
+
+#ifndef _STLP_CLIMITS
+#  include <climits>
+#endif
+
+#ifndef _STLP_INTERNAL_CSTDLIB
+#  include <stl/_cstdlib.h>
+#endif
+
+#ifndef _STLP_INTERNAL_UNINITIALIZED_H
+#  include <stl/_uninitialized.h>
+#endif
+
+_STLP_BEGIN_NAMESPACE
+
+template <class _Tp>
+pair<_Tp*, ptrdiff_t>  _STLP_CALL
+__get_temporary_buffer(ptrdiff_t __len, _Tp*);
+
+#ifndef _STLP_NO_EXPLICIT_FUNCTION_TMPL_ARGS
+
+template <class _Tp>
+inline pair<_Tp*, ptrdiff_t>  _STLP_CALL get_temporary_buffer(ptrdiff_t __len) {
+  return __get_temporary_buffer(__len, (_Tp*) 0);
+}
+
+# if ! defined(_STLP_NO_EXTENSIONS)
+// 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>  _STLP_CALL
+get_temporary_buffer(ptrdiff_t __len, _Tp*) {
+  return __get_temporary_buffer(__len, (_Tp*) 0);
+}
+# endif
+#endif
+
+template <class _Tp>
+inline void  _STLP_CALL return_temporary_buffer(_Tp* __p) {
+// SunPro brain damage
+  free((char*)__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&, const __true_type&) {}
+  void _M_initialize_buffer(const _Tp& val, const __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) {
+    // Workaround for a __type_traits bug in the pre-7.3 compiler.
+#   if defined(__sgi) && !defined(__GNUC__) && _COMPILER_VERSION < 730
+    typedef typename __type_traits<_Tp>::is_POD_type _Trivial;
+#   else
+    typedef typename __type_traits<_Tp>::has_trivial_default_constructor  _Trivial;
+#   endif
+    _STLP_TRY {
+      _M_len = distance(__first, __last);
+      _M_allocate_buffer();
+      if (_M_len > 0)
+        _M_initialize_buffer(*__first, _Trivial());
+    }
+    _STLP_UNWIND(free(_M_buffer); _M_buffer = 0; _M_len = 0)
+  }
+
+  ~_Temporary_buffer() {
+    _STLP_STD::_Destroy_Range(_M_buffer, _M_buffer + _M_len);
+    free(_M_buffer);
+  }
+
+private:
+  // Disable copy constructor and assignment operator.
+  _Temporary_buffer(const _Temporary_buffer<_ForwardIterator, _Tp>&) {}
+  void operator=(const _Temporary_buffer<_ForwardIterator, _Tp>&) {}
+};
+
+# ifndef _STLP_NO_EXTENSIONS
+
+// Class temporary_buffer is not part of the standard.  It is an extension.
+
+template <class _ForwardIterator,
+          class _Tp
+#ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
+                    = typename iterator_traits<_ForwardIterator>::value_type
+#endif /* _STLP_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() {}
+};
+
+# endif /* _STLP_NO_EXTENSIONS */
+
+_STLP_END_NAMESPACE
+
+# ifndef _STLP_LINK_TIME_INSTANTIATION
+#  include <stl/_tempbuf.c>
+# endif
+
+#endif /* _STLP_INTERNAL_TEMPBUF_H */
+
+// Local Variables:
+// mode:C++
+// End: