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/*
*
* 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.
*
*/
#ifndef TEMPBUF_H
#define TEMPBUF_H
#include <limits.h>
#include <pair.h>
#ifndef __stl_buffer_size
#define __stl_buffer_size 16384 // 16k
#endif
extern char __stl_temp_buffer[__stl_buffer_size];
//not reentrant code
template <class T>
pair<T*, int> get_temporary_buffer(int len, T*) {
while (len > __stl_buffer_size / sizeof(T)) {
set_new_handler(0);
T* tmp = (T*)(::operator new((unsigned int)len * sizeof(T)));
if (tmp) return pair<T*, int>(tmp, len);
len = len / 2;
}
return pair<T*, int>((T*)__stl_temp_buffer,
(int)(__stl_buffer_size / sizeof(T)));
}
template <class T>
void return_temporary_buffer(T* p) {
if ((char*)(p) != __stl_temp_buffer) deallocate(p);
}
template <class T>
pair<T*, long> get_temporary_buffer(long len, T* p) {
if (len > INT_MAX/sizeof(T))
len = INT_MAX/sizeof(T);
pair<T*, int> tmp = get_temporary_buffer((int)len, p);
return pair<T*, long>(tmp.first, (long)(tmp.second));
}
#endif
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