1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
|
#ifndef CXXSTDIO_HPP
#define CXXSTDIO_HPP
// cxxstdio.hpp - pass C++ types through scanf/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 "sanity.hpp"
#include <cstdarg>
#include <cstdio>
#include <string>
#include "const_array.hpp"
#include "utils2.hpp"
namespace cxxstdio
{
inline __attribute__((format(printf, 2, 0)))
int do_vprint(FILE *out, const char *fmt, va_list ap)
{
return vfprintf(out, fmt, ap);
}
inline __attribute__((format(printf, 2, 0)))
int do_vprint(std::string& out, const char *fmt, va_list ap)
{
int len;
{
va_list ap2;
va_copy(ap2, ap);
len = vsnprintf(nullptr, 0, fmt, ap2);
va_end(ap2);
}
char buffer[len + 1];
vsnprintf(buffer, len + 1, fmt, ap);
out = buffer;
return len;
}
inline __attribute__((format(scanf, 2, 0)))
int do_vscan(FILE *in, const char *fmt, va_list ap)
{
return vfscanf(in, fmt, ap);
}
#if 0
inline __attribute__((format(scanf, 2, 0)))
int do_vscan(const char *in, const char *fmt, va_list ap)
{
return vsscanf(in, fmt, ap);
}
#else
inline
int do_vscan(const char *, const char *, va_list) = delete;
#endif
inline __attribute__((format(scanf, 2, 0)))
int do_vscan(const std::string& in, const char *fmt, va_list ap)
{
return vsscanf(in.c_str(), fmt, ap);
}
template<class T>
inline __attribute__((format(printf, 2, 3)))
int do_print(T&& t, const char *fmt, ...) throw()
{
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>
inline __attribute__((format(scanf, 2, 3)))
int do_scan(T&& t, const char *fmt, ...) throw()
{
int rv;
va_list ap;
va_start(ap, fmt);
rv = do_vscan(std::forward<T>(t), fmt, ap);
va_end(ap);
return rv;
}
template<class T>
typename remove_enum<T>::type convert_for_printf(T v)
{
typedef typename remove_enum<T>::type repr_type;
return repr_type(v);
}
template<class T, typename = typename std::enable_if<!std::is_enum<T>::value>::type>
T& convert_for_scanf(T& v)
{
return v;
}
#if 0
template<class E>
constexpr
E get_enum_min_value(decltype(E::min_value))
{
return E::min_value;
}
template<class E>
constexpr
E get_enum_min_value(E def)
{
return def;
}
template<class E>
constexpr
E get_enum_max_value(decltype(E::max_value))
{
return E::max_value;
}
template<class E>
constexpr
E get_enum_max_value(E def)
{
return def;
}
#else
template<class E>
constexpr
E get_enum_min_value(E)
{
return E::min_value;
}
template<class E>
constexpr
E get_max_value(E)
{
return E::max_value;
}
#endif
template<class E>
class EnumConverter
{
E& out;
typedef typename underlying_type<E>::type U;
#if 0
constexpr static
U min_value = U(get_enum_min_value<E>(E(std::numeric_limits<U>::min())));
constexpr static
U max_value = U(get_enum_max_value<E>(E(std::numeric_limits<U>::max())));
#else
constexpr static
U min_value = U(get_enum_min_value(E()));
constexpr static
U max_value = U(get_enum_max_value(E()));
#endif
U mid;
public:
EnumConverter(E& e)
: out(e), mid(0)
{}
~EnumConverter()
{
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wtype-limits"
if (min_value <= mid && mid <= max_value)
#pragma GCC diagnostic pop
out = E(mid);
}
U *operator &()
{
return ∣
}
};
template<class T, typename = typename std::enable_if<std::is_enum<T>::value>::type>
EnumConverter<T> convert_for_scanf(T& v)
{
return v;
}
inline
const char *convert_for_printf(const std::string& s)
{
return s.c_str();
}
class StringConverter
{
std::string& out;
char *mid;
public:
StringConverter(std::string& s)
: out(s), mid(nullptr)
{}
~StringConverter();
char **operator &()
{
return ∣
}
};
inline
StringConverter convert_for_scanf(std::string& s)
{
return StringConverter(s);
}
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();
return do_print(std::forward<T>(t), print_format,
convert_for_printf(std::forward<A>(a))...);
}
};
template<class Format>
class ScanFormatter
{
public:
template<class T, class... A>
static
int scan(T&& t, A&&... a)
{
constexpr static
const char *scan_format = Format::scan_format();
return do_scan(std::forward<T>(t), scan_format,
&convert_for_scanf(*a)...);
}
};
#define FPRINTF(file, fmt, ...) \
([&]() -> int \
{ \
struct format_impl \
{ \
constexpr static \
const char *print_format() { return fmt; } \
}; \
return cxxstdio::PrintFormatter<format_impl>::print(file, ## __VA_ARGS__); \
}())
#define FSCANF(file, fmt, ...) \
([&]() -> int \
{ \
struct format_impl \
{ \
constexpr static \
const char *scan_format() { return fmt; } \
}; \
return cxxstdio::ScanFormatter<format_impl>::scan(file, ## __VA_ARGS__); \
}())
#define PRINTF(fmt, ...) FPRINTF(stdout, fmt, ## __VA_ARGS__)
#define SPRINTF(str, fmt, ...) FPRINTF(str, fmt, ## __VA_ARGS__)
#define SCANF(fmt, ...) FSCANF(stdin, fmt, ## __VA_ARGS__)
#define SSCANF(str, fmt, ...) FSCANF(str, fmt, ## __VA_ARGS__)
#define STRPRINTF(fmt, ...) \
([&]() -> std::string \
{ \
std::string _out_impl; \
SPRINTF(_out_impl, fmt, ## __VA_ARGS__);\
return _out_impl; \
}())
} // namespace cxxstdio
#endif // CXXSTDIO_HPP
|
