/usr/include/cupt/format2.hpp is in libcupt3-dev 2.6.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2011-2012 by Eugene V. Lyubimkin *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License *
* (version 3 or above) as published by the Free Software Foundation. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU GPL *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA *
**************************************************************************/
// only for internal inclusion
/// @cond
#include <cstdio>
#include <cstring>
#include <string>
namespace cupt {
using std::string;
namespace internal {
namespace format2impl {
template < typename... All >
struct Tuple;
template < typename Head, typename... Tail >
struct Tuple< Head, Tail... >
{
const Head& head;
Tuple< Tail... > tail;
Tuple< Head, Tail...>(const Head& head_, const Tail&... tail_)
: head(head_), tail(tail_...)
{}
};
template <>
struct Tuple<>
{};
template < typename... Args >
string tupleformat(Tuple<>, Args... args)
{
char formattedBuffer[4096];
auto bytesWritten = snprintf(formattedBuffer, sizeof(formattedBuffer), args...);
if ((size_t)bytesWritten < sizeof(formattedBuffer))
{
return string(formattedBuffer);
}
else
{
// we need a bigger buffer, allocate it dynamically
auto size = bytesWritten+1;
char* dynamicBuffer = new char[size];
snprintf(dynamicBuffer, size, args...);
string result(dynamicBuffer);
delete [] dynamicBuffer;
return result;
}
}
template< typename TupleT, typename... Args >
string tupleformat(TupleT&& tuple, Args... args)
{
return tupleformat(tuple.tail, args..., tuple.head);
}
template < typename... TupleTailT, typename... Args >
string tupleformat(Tuple< string, TupleTailT... > tuple, Args... args)
{
return tupleformat(tuple.tail, args..., tuple.head.c_str());
}
}
}
// now public parts
template < typename... Args >
string format2(const char* format, const Args&... args)
{
return internal::format2impl::tupleformat(
internal::format2impl::Tuple< const char*, Args... >(format, args...));
}
template < typename... Args >
string format2(const string& format, const Args&... args)
{
return format2(format.c_str(), args...);
}
template < typename... Args >
string format2e(const char* format, const Args&... args)
{
char errorBuffer[255] = "?";
// error message may not go to errorBuffer, see man strerror_r (GNU version)
auto errorString = strerror_r(errno, errorBuffer, sizeof(errorBuffer));
return format2(format, args...) + ": " + errorString;
}
template < typename... Args >
string format2e(const string& format, const Args&... args)
{
return format2e(format.c_str(), args...);
}
CUPT_API void __mwrite_line(const char*, const string&);
template < typename... Args >
__attribute ((noreturn)) void fatal2(const string& format, const Args&... args)
{
auto errorString = format2(format, args...);
__mwrite_line("E: ", errorString);
throw Exception(errorString);
}
template < typename... Args >
void fatal2i(const char* format, const Args&... args)
{
fatal2((string("internal error: ") + format), args...);
}
template < typename... Args >
void fatal2e(const string& format, const Args&... args)
{
auto errorString = format2e(format, args...);
__mwrite_line("E: ", errorString);
throw Exception(errorString);
}
template < typename... Args >
void warn2(const string& format, const Args&... args)
{
__mwrite_line("W: ", format2(format, args...));
}
template < typename... Args >
void warn2e(const string& format, const Args&... args)
{
__mwrite_line("W: ", format2e(format, args...));
}
template < typename... Args >
void debug2(const char* format, const Args&... args)
{
__mwrite_line("D: ", format2(format, args...));
}
template < typename... Args >
void simulate2(const char* format, const Args&... args)
{
__mwrite_line("S: ", format2(format, args...));
}
}
/// @endcond
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