--- /dev/null
+/*
+ * Copyright (c) 1997-1999
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Copyright (c) 1999
+ * Boris Fomitchev
+ *
+ * Copyright (c) 2003
+ * Francois Dumont
+ *
+ * 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_STRING_BASE_H
+#define _STLP_STRING_BASE_H
+
+// ------------------------------------------------------------
+// Class _String_base.
+
+// _String_base is a helper class that makes it it easier to write an
+// exception-safe version of basic_string. The constructor allocates,
+// but does not initialize, a block of memory. The destructor
+// deallocates, but does not destroy elements within, a block of
+// memory. The destructor assumes that _M_start either is null, or else
+// points to a block of memory that was allocated using _String_base's
+// allocator and whose size is _M_end_of_storage._M_data - _M_start.
+
+_STLP_BEGIN_NAMESPACE
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+#ifndef _STLP_SHORT_STRING_SZ
+# define _STLP_SHORT_STRING_SZ 16
+#endif
+
+template <class _Tp, class _Alloc>
+class _String_base {
+ typedef _String_base<_Tp, _Alloc> _Self;
+protected:
+ _STLP_FORCE_ALLOCATORS(_Tp, _Alloc)
+public:
+ //dums: Some compiler(MSVC6) require it to be public not simply protected!
+ enum {_DEFAULT_SIZE = _STLP_SHORT_STRING_SZ};
+ //This is needed by the full move framework
+ typedef typename _Alloc_traits<_Tp, _Alloc>::allocator_type allocator_type;
+ typedef _STLP_alloc_proxy<_Tp*, _Tp, allocator_type> _AllocProxy;
+ typedef size_t size_type;
+private:
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ union _Buffers {
+ _Tp* _M_dynamic_buf;
+ _Tp _M_static_buf[_DEFAULT_SIZE];
+ } _M_buffers;
+#else
+ _Tp* _M_start;
+#endif /* _STLP_USE_SHORT_STRING_OPTIM */
+protected:
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ bool _M_using_static_buf() const {
+ return (_M_end_of_storage._M_data == _M_buffers._M_static_buf + _DEFAULT_SIZE);
+ }
+ _Tp const* _M_Start() const {
+ return _M_using_static_buf()?_M_buffers._M_static_buf:_M_buffers._M_dynamic_buf;
+ }
+ _Tp* _M_Start() {
+ return _M_using_static_buf()?_M_buffers._M_static_buf:_M_buffers._M_dynamic_buf;
+ }
+#else
+ _Tp const* _M_Start() const {return _M_start;}
+ _Tp* _M_Start() {return _M_start;}
+#endif /* _STLP_USE_SHORT_STRING_OPTIM */
+
+ _Tp* _M_finish;
+ _AllocProxy _M_end_of_storage;
+
+ _Tp const* _M_Finish() const {return _M_finish;}
+ _Tp* _M_Finish() {return _M_finish;}
+
+ // Precondition: 0 < __n <= max_size().
+ void _M_allocate_block(size_t __n = _DEFAULT_SIZE);
+ void _M_deallocate_block() {
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ if (!_M_using_static_buf() && (_M_buffers._M_dynamic_buf != 0))
+ _M_end_of_storage.deallocate(_M_buffers._M_dynamic_buf, _M_end_of_storage._M_data - _M_buffers._M_dynamic_buf);
+#else
+ if (_M_start != 0)
+ _M_end_of_storage.deallocate(_M_start, _M_end_of_storage._M_data - _M_start);
+#endif /* _STLP_USE_SHORT_STRING_OPTIM */
+ }
+
+ size_t max_size() const {
+ const size_type __string_max_size = size_type(-1) / sizeof(_Tp);
+ typename allocator_type::size_type __alloc_max_size = _M_end_of_storage.max_size();
+ return (min)(__alloc_max_size, __string_max_size) - 1;
+ }
+
+ _String_base(const allocator_type& __a)
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ : _M_finish(_M_buffers._M_static_buf), _M_end_of_storage(__a, _M_buffers._M_static_buf + _DEFAULT_SIZE)
+#else
+ : _M_start(0), _M_finish(0), _M_end_of_storage(__a, (_Tp*)0)
+#endif
+ {}
+
+ _String_base(const allocator_type& __a, size_t __n)
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ : _M_finish(_M_buffers._M_static_buf), _M_end_of_storage(__a, _M_buffers._M_static_buf + _DEFAULT_SIZE) {
+#else
+ : _M_start(0), _M_finish(0), _M_end_of_storage(__a, (_Tp*)0) {
+#endif
+ _M_allocate_block(__n);
+ }
+
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ void _M_move_src (_Self &src) {
+ if (src._M_using_static_buf()) {
+ _M_buffers = src._M_buffers;
+ _M_finish = _M_buffers._M_static_buf + (src._M_finish - src._M_buffers._M_static_buf);
+ _M_end_of_storage._M_data = _M_buffers._M_static_buf + _DEFAULT_SIZE;
+ }
+ else {
+ _M_buffers._M_dynamic_buf = src._M_buffers._M_dynamic_buf;
+ _M_finish = src._M_finish;
+ _M_end_of_storage._M_data = src._M_end_of_storage._M_data;
+ src._M_buffers._M_dynamic_buf = 0;
+ }
+ }
+#endif
+
+ _String_base(__move_source<_Self> src)
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ : _M_end_of_storage(__move_source<_AllocProxy>(src.get()._M_end_of_storage)) {
+ _M_move_src(src.get());
+#else
+ : _M_start(src.get()._M_start), _M_finish(src.get()._M_finish),
+ _M_end_of_storage(__move_source<_AllocProxy>(src.get()._M_end_of_storage)) {
+ src.get()._M_start = 0;
+#endif
+ }
+
+ ~_String_base() { _M_deallocate_block(); }
+
+ void _M_reset(_Tp *__start, _Tp *__finish, _Tp *__end_of_storage) {
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ _M_buffers._M_dynamic_buf = __start;
+#else
+ _M_start = __start;
+#endif
+ _M_finish = __finish;
+ _M_end_of_storage._M_data = __end_of_storage;
+ }
+
+ void _M_destroy_back () {
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ if (!_M_using_static_buf())
+#endif /* _STLP_USE_SHORT_STRING_OPTIM */
+ _STLP_STD::_Destroy(_M_finish);
+ }
+
+ void _M_destroy_range(size_t __from_off = 0, size_t __to_off = 1) {
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ if (!_M_using_static_buf())
+ _STLP_STD::_Destroy_Range(_M_buffers._M_dynamic_buf + __from_off, _M_finish + __to_off);
+#else
+ _STLP_STD::_Destroy_Range(_M_start + __from_off, _M_finish + __to_off);
+#endif /* _STLP_USE_SHORT_STRING_OPTIM */
+ }
+
+ void _M_destroy_ptr_range(_Tp *__f, _Tp *__l) {
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ if (!_M_using_static_buf())
+#endif /* _STLP_USE_SHORT_STRING_OPTIM */
+ _STLP_STD::_Destroy_Range(__f, __l);
+ }
+
+ void _M_Swap(_Self &__s) {
+#if defined (_STLP_USE_SHORT_STRING_OPTIM)
+ if (_M_using_static_buf()) {
+ if (__s._M_using_static_buf()) {
+ _STLP_STD::swap(_M_buffers, __s._M_buffers);
+ _Tp *__tmp = _M_finish;
+ _M_finish = _M_buffers._M_static_buf + (__s._M_finish - __s._M_buffers._M_static_buf);
+ __s._M_finish = __s._M_buffers._M_static_buf + (__tmp - _M_buffers._M_static_buf);
+ //We need to swap _M_end_of_storage for allocators with state:
+ _M_end_of_storage.swap(__s._M_end_of_storage);
+ _M_end_of_storage._M_data = _M_buffers._M_static_buf + _DEFAULT_SIZE;
+ __s._M_end_of_storage._M_data = __s._M_buffers._M_static_buf + _DEFAULT_SIZE;
+ } else {
+ __s._M_Swap(*this);
+ return;
+ }
+ }
+ else if (__s._M_using_static_buf()) {
+ _Tp *__tmp = _M_buffers._M_dynamic_buf;
+ _Tp *__tmp_finish = _M_finish;
+ _Tp *__tmp_end_data = _M_end_of_storage._M_data;
+ _M_buffers = __s._M_buffers;
+ //We need to swap _M_end_of_storage for allocators with state:
+ _M_end_of_storage.swap(__s._M_end_of_storage);
+ _M_end_of_storage._M_data = _M_buffers._M_static_buf + _DEFAULT_SIZE;
+ _M_finish = _M_buffers._M_static_buf + (__s._M_finish - __s._M_buffers._M_static_buf);
+ __s._M_buffers._M_dynamic_buf = __tmp;
+ __s._M_end_of_storage._M_data = __tmp_end_data;
+ __s._M_finish = __tmp_finish;
+ }
+ else {
+ _STLP_STD::swap(_M_buffers._M_dynamic_buf, __s._M_buffers._M_dynamic_buf);
+ _M_end_of_storage.swap(__s._M_end_of_storage);
+ _STLP_STD::swap(_M_finish, __s._M_finish);
+ }
+#else
+ _STLP_STD::swap(_M_start, __s._M_start);
+ _M_end_of_storage.swap(__s._M_end_of_storage);
+ _STLP_STD::swap(_M_finish, __s._M_finish);
+#endif /* _STLP_USE_SHORT_STRING_OPTIM */
+ }
+
+ void _STLP_FUNCTION_THROWS _M_throw_length_error() const;
+ void _STLP_FUNCTION_THROWS _M_throw_out_of_range() const;
+};
+
+#undef _STLP_SHORT_STRING_SZ
+
+#if defined (_STLP_USE_TEMPLATE_EXPORT)
+_STLP_EXPORT_TEMPLATE_CLASS _String_base<char, allocator<char> >;
+# if defined (_STLP_HAS_WCHAR_T)
+_STLP_EXPORT_TEMPLATE_CLASS _String_base<wchar_t, allocator<wchar_t> >;
+# endif
+#endif /* _STLP_USE_TEMPLATE_EXPORT */
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+_STLP_END_NAMESPACE
+
+#endif /* _STLP_STRING_BASE_H */
+
+/*
+ * Local Variables:
+ * mode:C++
+ * End:
+ */
projects / polintos / scott / priv.git / blobdiff