4 * Hewlett-Packard Company
6 * Copyright (c) 1996,1997
7 * Silicon Graphics Computer Systems, Inc.
10 * Moscow Center for SPARC Technology
15 * This material is provided "as is", with absolutely no warranty expressed
16 * or implied. Any use is at your own risk.
18 * Permission to use or copy this software for any purpose is hereby granted
19 * without fee, provided the above notices are retained on all copies.
20 * Permission to modify the code and to distribute modified code is granted,
21 * provided the above notices are retained, and a notice that the code was
22 * modified is included with the above copyright notice.
26 /* NOTE: This is an internal header file, included by other STL headers.
27 * You should not attempt to use it directly.
30 #ifndef _STLP_INTERNAL_TEMPBUF_H
31 #define _STLP_INTERNAL_TEMPBUF_H
37 #ifndef _STLP_INTERNAL_CSTDLIB
38 # include <stl/_cstdlib.h>
41 #ifndef _STLP_INTERNAL_UNINITIALIZED_H
42 # include <stl/_uninitialized.h>
48 pair<_Tp*, ptrdiff_t> _STLP_CALL
49 __get_temporary_buffer(ptrdiff_t __len, _Tp*);
51 #ifndef _STLP_NO_EXPLICIT_FUNCTION_TMPL_ARGS
54 inline pair<_Tp*, ptrdiff_t> _STLP_CALL get_temporary_buffer(ptrdiff_t __len) {
55 return __get_temporary_buffer(__len, (_Tp*) 0);
58 # if ! defined(_STLP_NO_EXTENSIONS)
59 // This overload is not required by the standard; it is an extension.
60 // It is supported for backward compatibility with the HP STL, and
61 // because not all compilers support the language feature (explicit
62 // function template arguments) that is required for the standard
63 // version of get_temporary_buffer.
65 inline pair<_Tp*, ptrdiff_t> _STLP_CALL
66 get_temporary_buffer(ptrdiff_t __len, _Tp*) {
67 return __get_temporary_buffer(__len, (_Tp*) 0);
73 inline void _STLP_CALL return_temporary_buffer(_Tp* __p) {
74 // SunPro brain damage
78 template <class _ForwardIterator, class _Tp>
79 class _Temporary_buffer {
81 ptrdiff_t _M_original_len;
85 void _M_allocate_buffer() {
86 _M_original_len = _M_len;
89 if (_M_len > (ptrdiff_t)(INT_MAX / sizeof(_Tp)))
90 _M_len = INT_MAX / sizeof(_Tp);
93 _M_buffer = (_Tp*) malloc(_M_len * sizeof(_Tp));
100 void _M_initialize_buffer(const _Tp&, const __true_type&) {}
101 void _M_initialize_buffer(const _Tp& val, const __false_type&) {
102 uninitialized_fill_n(_M_buffer, _M_len, val);
106 ptrdiff_t size() const { return _M_len; }
107 ptrdiff_t requested_size() const { return _M_original_len; }
108 _Tp* begin() { return _M_buffer; }
109 _Tp* end() { return _M_buffer + _M_len; }
111 _Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) {
112 // Workaround for a __type_traits bug in the pre-7.3 compiler.
113 # if defined(__sgi) && !defined(__GNUC__) && _COMPILER_VERSION < 730
114 typedef typename __type_traits<_Tp>::is_POD_type _Trivial;
116 typedef typename __type_traits<_Tp>::has_trivial_default_constructor _Trivial;
119 _M_len = distance(__first, __last);
120 _M_allocate_buffer();
122 _M_initialize_buffer(*__first, _Trivial());
124 _STLP_UNWIND(free(_M_buffer); _M_buffer = 0; _M_len = 0)
127 ~_Temporary_buffer() {
128 _STLP_STD::_Destroy_Range(_M_buffer, _M_buffer + _M_len);
133 // Disable copy constructor and assignment operator.
134 _Temporary_buffer(const _Temporary_buffer<_ForwardIterator, _Tp>&) {}
135 void operator=(const _Temporary_buffer<_ForwardIterator, _Tp>&) {}
138 # ifndef _STLP_NO_EXTENSIONS
140 // Class temporary_buffer is not part of the standard. It is an extension.
142 template <class _ForwardIterator,
144 #ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
145 = typename iterator_traits<_ForwardIterator>::value_type
146 #endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */
148 struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp>
150 temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
151 : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) {}
152 ~temporary_buffer() {}
155 # endif /* _STLP_NO_EXTENSIONS */
159 # ifndef _STLP_LINK_TIME_INSTANTIATION
160 # include <stl/_tempbuf.c>
163 #endif /* _STLP_INTERNAL_TEMPBUF_H */