williamr@2: /* williamr@2: * williamr@2: * Copyright (c) 1994 williamr@2: * Hewlett-Packard Company williamr@2: * williamr@2: * Copyright (c) 1996,1997 williamr@2: * Silicon Graphics Computer Systems, Inc. williamr@2: * williamr@2: * Copyright (c) 1997 williamr@2: * Moscow Center for SPARC Technology williamr@2: * williamr@2: * Copyright (c) 1999 williamr@2: * Boris Fomitchev williamr@2: * williamr@2: * This material is provided "as is", with absolutely no warranty expressed williamr@2: * or implied. Any use is at your own risk. williamr@2: * williamr@2: * Permission to use or copy this software for any purpose is hereby granted williamr@2: * without fee, provided the above notices are retained on all copies. williamr@2: * Permission to modify the code and to distribute modified code is granted, williamr@2: * provided the above notices are retained, and a notice that the code was williamr@2: * modified is included with the above copyright notice. williamr@2: * williamr@2: */ williamr@2: williamr@2: /* NOTE: This is an internal header file, included by other STL headers. williamr@2: * You should not attempt to use it directly. williamr@2: */ williamr@2: williamr@2: #ifndef _STLP_INTERNAL_TEMPBUF_H williamr@2: #define _STLP_INTERNAL_TEMPBUF_H williamr@2: williamr@2: # ifndef _STLP_CLIMITS williamr@2: # include williamr@2: # endif williamr@2: # ifndef _STLP_CSTDLIB williamr@2: # include williamr@2: # endif williamr@2: # ifndef _STLP_INTERNAL_UNINITIALIZED_H williamr@2: # include williamr@2: # endif williamr@2: williamr@2: _STLP_BEGIN_NAMESPACE williamr@2: williamr@2: template williamr@2: pair<_Tp*, ptrdiff_t> _STLP_CALL williamr@2: __get_temporary_buffer(ptrdiff_t __len, _Tp*); williamr@2: williamr@2: #ifndef _STLP_NO_EXPLICIT_FUNCTION_TMPL_ARGS williamr@2: williamr@2: template williamr@2: inline pair<_Tp*, ptrdiff_t> _STLP_CALL get_temporary_buffer(ptrdiff_t __len) { williamr@2: return __get_temporary_buffer(__len, (_Tp*) 0); williamr@2: } williamr@2: williamr@2: # if ! defined(_STLP_NO_EXTENSIONS) williamr@2: // This overload is not required by the standard; it is an extension. williamr@2: // It is supported for backward compatibility with the HP STL, and williamr@2: // because not all compilers support the language feature (explicit williamr@2: // function template arguments) that is required for the standard williamr@2: // version of get_temporary_buffer. williamr@2: template williamr@2: inline pair<_Tp*, ptrdiff_t> _STLP_CALL williamr@2: get_temporary_buffer(ptrdiff_t __len, _Tp*) { williamr@2: return __get_temporary_buffer(__len, (_Tp*) 0); williamr@2: } williamr@2: # endif williamr@2: #endif williamr@2: williamr@2: template williamr@2: inline void _STLP_CALL return_temporary_buffer(_Tp* __p) { williamr@2: // SunPro brain damage williamr@2: free((char*)__p); williamr@2: } williamr@2: williamr@2: template williamr@2: class _Temporary_buffer { williamr@2: private: williamr@2: ptrdiff_t _M_original_len; williamr@2: ptrdiff_t _M_len; williamr@2: _Tp* _M_buffer; williamr@2: williamr@2: void _M_allocate_buffer() { williamr@2: _M_original_len = _M_len; williamr@2: _M_buffer = 0; williamr@2: williamr@2: if (_M_len > (ptrdiff_t)(INT_MAX / sizeof(_Tp))) williamr@2: _M_len = INT_MAX / sizeof(_Tp); williamr@2: williamr@2: while (_M_len > 0) { williamr@2: _M_buffer = (_Tp*) malloc(_M_len * sizeof(_Tp)); williamr@2: if (_M_buffer) williamr@2: break; williamr@2: _M_len /= 2; williamr@2: } williamr@2: } williamr@2: williamr@2: void _M_initialize_buffer(const _Tp&, const __true_type&) {} williamr@2: void _M_initialize_buffer(const _Tp& val, const __false_type&) { williamr@2: uninitialized_fill_n(_M_buffer, _M_len, val); williamr@2: } williamr@2: williamr@2: public: williamr@2: ptrdiff_t size() const { return _M_len; } williamr@2: ptrdiff_t requested_size() const { return _M_original_len; } williamr@2: _Tp* begin() { return _M_buffer; } williamr@2: _Tp* end() { return _M_buffer + _M_len; } williamr@2: williamr@2: _Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) { williamr@2: // Workaround for a __type_traits bug in the pre-7.3 compiler. williamr@2: # if defined(__sgi) && !defined(__GNUC__) && _COMPILER_VERSION < 730 williamr@2: typedef typename __type_traits<_Tp>::is_POD_type _Trivial; williamr@2: # else williamr@2: typedef typename __type_traits<_Tp>::has_trivial_default_constructor _Trivial; williamr@2: # endif williamr@2: _STLP_TRY { williamr@2: _M_len = distance(__first, __last); williamr@2: _M_allocate_buffer(); williamr@2: if (_M_len > 0) williamr@2: _M_initialize_buffer(*__first, _Trivial()); williamr@2: } williamr@2: _STLP_UNWIND(free(_M_buffer); _M_buffer = 0; _M_len = 0); williamr@2: } williamr@2: williamr@2: ~_Temporary_buffer() { williamr@2: _STLP_STD::_Destroy(_M_buffer, _M_buffer + _M_len); williamr@2: free(_M_buffer); williamr@2: } williamr@2: williamr@2: private: williamr@2: // Disable copy constructor and assignment operator. williamr@2: _Temporary_buffer(const _Temporary_buffer<_ForwardIterator, _Tp>&) {} williamr@2: void operator=(const _Temporary_buffer<_ForwardIterator, _Tp>&) {} williamr@2: }; williamr@2: williamr@2: # ifndef _STLP_NO_EXTENSIONS williamr@2: williamr@2: // Class temporary_buffer is not part of the standard. It is an extension. williamr@2: williamr@2: template ::value_type williamr@2: #endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */ williamr@2: > williamr@2: struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp> williamr@2: { williamr@2: temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) williamr@2: : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) {} williamr@2: ~temporary_buffer() {} williamr@2: }; williamr@2: williamr@2: # endif /* _STLP_NO_EXTENSIONS */ williamr@2: williamr@2: _STLP_END_NAMESPACE williamr@2: williamr@2: # ifndef _STLP_LINK_TIME_INSTANTIATION williamr@2: # include williamr@2: # endif williamr@2: williamr@2: #endif /* _STLP_INTERNAL_TEMPBUF_H */ williamr@2: williamr@2: // Local Variables: williamr@2: // mode:C++ williamr@2: // End: