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#ifndef INCLUDE_UTIL_H
#define INCLUDE_UTIL_H
// util.h
// Revision 24-apr-2009
#include <string>
#include <sstream>
#include <stdexcept>
#include <iostream>
#include <stdlib.h>
#ifdef __BORLANDC__
#pragma warn -8027
#endif
namespace util {
inline std::string stringlset (const std::string & value,
std::string::size_type l)
{
const std::string::size_type lvalue= value.size ();
if (lvalue < l)
return value + std::string (l - lvalue, ' ');
else if (lvalue > l)
return value.substr (0, l);
else
return value;
}
inline std::string stringrset (const std::string & value,
std::string::size_type l)
{
const std::string::size_type lvalue= value.size ();
if (lvalue < l)
return std::string (l - lvalue, ' ') + value;
else if (lvalue > l)
return value.substr (0, l);
else
return value;
}
template <class DEST, class ORG, class EX>
DEST checked_cast (ORG org, EX ex)
{
DEST dest= static_cast <DEST> (org);
if (static_cast <ORG> (dest) != org)
throw ex;
return dest;
}
template <class C, size_t N>
size_t dim_array (C (&) [N])
{ return N; }
template <class C, size_t N>
size_t dim_array (const C (&) [N])
{ return N; }
template <class C>
class auto_buffer
{
public:
auto_buffer (size_t ns) :
p (new C [ns]),
s (ns)
{ }
auto_buffer () : p (0) { }
~auto_buffer ()
{ delete [] p; }
void release () { p= 0; }
void alloc (size_t ns)
{
delete [] p;
p= new C [ns];
s= ns;
}
operator C * () { return p; }
typedef C * iterator;
iterator begin () { return p; }
iterator end () { return p + s; }
// We define data for commodity, and better legibility
// than begin where not used as iterator.
C * data () { return p; }
private:
auto_buffer (const auto_buffer &); // Forbidden
auto_buffer & operator = (const auto_buffer &); // Forbidden
C * p;
size_t s;
};
template <class C>
class auto_alloc
{
public:
auto_alloc (size_t size) :
p (static_cast <C *> (malloc (size * sizeof (C) ) ) )
{
if (p == 0)
throw std::bad_alloc ();
}
~auto_alloc ()
{ free (p); }
void release () { p= 0; }
operator C * () { return p; }
C * data () { return p; } // Commodity when cast is needed
private:
auto_alloc (const auto_alloc &); // Forbidden
auto_alloc & operator = (const auto_alloc &); // Forbidden
C * p;
};
// This template is intended for use as a pointer to a
// private implementation that translates the constness of
// the operations in the main class to the implementation.
template <class C>
class pimpl_ptr
{
public:
pimpl_ptr (C * ptr) :
p (ptr)
{ }
~pimpl_ptr ()
{
delete p;
}
// Bypass the acces control
C * get () const
{ return p; }
// The dereference operator that preserves constness.
C & operator * ()
{ return * p; }
const C & operator * () const
{ return * p; }
C * operator -> ()
{ return p; }
const C * operator -> () const
{
return p;
}
private:
pimpl_ptr (const pimpl_ptr &); // Forbidden
pimpl_ptr & operator = (const pimpl_ptr &); // Forbidden
C * const p;
};
template <class C>
std::string to_string (const C & c)
{
std::ostringstream oss;
oss << c;
return oss.str ();
}
// Functions used to avoid warnings about unused parameters.
template <class T>
inline void touch (const T & t)
{
(void) t;
}
template <class T1, class T2>
inline void touch (const T1 & t1, const T2 & t2)
{
(void) t1; (void) t2;
}
template <class T1, class T2, class T3>
inline void touch (const T1 & t1, const T2 & t2, const T3 & t3)
{
(void) t1; (void) t2; (void) t3;
}
template <class T1, class T2, class T3, class T4>
inline void touch (const T1 & t1, const T2 & t2, const T3 & t3,
const T4 & t4)
{
(void) t1; (void) t2; (void) t3;
(void) t4;
}
template <class T1, class T2, class T3, class T4, class T5>
inline void touch (const T1 & t1, const T2 & t2, const T3 & t3,
const T4 & t4, const T5 & t5)
{
(void) t1; (void) t2; (void) t3;
(void) t4; (void) t5;
}
template <class T1, class T2, class T3, class T4, class T5, class T6>
inline void touch (const T1 & t1, const T2 & t2, const T3 & t3,
const T4 & t4, const T5 & t5, const T6 & t6)
{
(void) t1; (void) t2; (void) t3;
(void) t4; (void) t5; (void) t6;
}
} // namespace
#endif
// End of util.h
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