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#pragma once
// cxxstdio.hpp - pass C++ types through printf
//
// Copyright © 2011-2013 Ben Longbons <b.r.longbons@gmail.com>
//
// This file is part of The Mana World (Athena server)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// 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 General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "fwd.hpp"
#include <cstdarg>
#include <cstdio>
#include "../compat/cast.hpp"
#include "../diagnostics.hpp"
namespace tmwa
{
namespace cxxstdio
{
// other implementations of do_vprint are injected by ADL.
inline __attribute__((format(printf, 2, 0)))
int do_vprint(FILE *out, const char *fmt, va_list ap)
{
return vfprintf(out, fmt, ap);
}
template<class T>
inline __attribute__((format(printf, 2, 3)))
int do_print(T&& t, const char *fmt, ...)
{
int rv;
va_list ap;
va_start(ap, fmt);
rv = do_vprint(std::forward<T>(t), fmt, ap);
va_end(ap);
return rv;
}
template<class T, typename=typename std::enable_if<!std::is_class<T>::value>::type>
T decay_for_printf(T v)
{
return v;
}
template<class T, typename=decltype(decay_for_printf(std::declval<T&&>()))>
T&& convert_for_printf(T&& v)
{
return std::forward<T>(v);
}
inline
const char *convert_for_printf(const char *) = delete;
template<class Format>
class PrintFormatter
{
public:
template<class T, class... A>
static
int print(T&& t, A&&... a)
{
constexpr static
const char *print_format = Format::print_format().format_string();
return do_print(std::forward<T>(t), print_format,
decay_for_printf(convert_for_printf(std::forward<A>(a)))...);
}
};
#define XPRINTF(out, fmt, ...) \
({ \
struct format_impl \
{ \
constexpr static \
FormatString print_format() __asm__("_print_format") { return fmt; } \
}; \
cxxstdio::PrintFormatter<format_impl>::print(out, ## __VA_ARGS__); \
})
#define FPRINTF(file, fmt, ...) XPRINTF(/*no_cast<FILE *>*/(file), fmt, ## __VA_ARGS__)
#define PRINTF(fmt, ...) FPRINTF(stdout, fmt, ## __VA_ARGS__)
#define SPRINTF(str, fmt, ...) XPRINTF(base_cast<AString&>(str), fmt, ## __VA_ARGS__)
#define SNPRINTF(str, n, fmt, ...) XPRINTF(base_cast<VString<n-1>&>(str), fmt, ## __VA_ARGS__)
#define STRPRINTF(fmt, ...) \
({ \
AString _out_impl; \
SPRINTF(_out_impl, fmt, ## __VA_ARGS__); \
_out_impl; \
})
#define STRNPRINTF(n, fmt, ...) \
({ \
VString<n - 1> _out_impl; \
SNPRINTF(_out_impl, n, fmt, ## __VA_ARGS__); \
_out_impl; \
})
} // namespace cxxstdio
} // namespace tmwa
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