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
|
/*
* Copyright (C) 2009 Tobias Brunner
* Copyright (C) 2006-2008 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
/**
* @defgroup printf_hook printf_hook
* @{ @ingroup libstrongswan
*/
#ifndef PRINTF_HOOK_H_
#define PRINTF_HOOK_H_
typedef struct printf_hook_t printf_hook_t;
typedef struct printf_hook_spec_t printf_hook_spec_t;
typedef struct printf_hook_data_t printf_hook_data_t;
typedef enum printf_hook_argtype_t printf_hook_argtype_t;
#if !defined(USE_VSTR) && \
!defined(HAVE_PRINTF_FUNCTION) && \
!defined(HAVE_PRINTF_SPECIFIER)
/* assume newer glibc register_printf_specifier if none given */
#define HAVE_PRINTF_SPECIFIER
#endif
#if !defined(USE_VSTR) && \
(defined(HAVE_PRINTF_FUNCTION) || defined(HAVE_PRINTF_SPECIFIER))
#include <stdio.h>
#include <printf.h>
enum printf_hook_argtype_t {
PRINTF_HOOK_ARGTYPE_END = -1,
PRINTF_HOOK_ARGTYPE_INT = PA_INT,
PRINTF_HOOK_ARGTYPE_POINTER = PA_POINTER,
};
/**
* Data to pass to a printf hook.
*/
struct printf_hook_data_t {
/**
* Output FILE stream
*/
FILE *stream;;
};
/**
* Helper macro to be used in printf hook callbacks.
*/
#define print_in_hook(data, fmt, ...) ({\
ssize_t _written = fprintf(data->stream, fmt, ##__VA_ARGS__);\
if (_written < 0)\
{\
_written = 0;\
}\
_written;\
})
#else
#include <vstr.h>
enum printf_hook_argtype_t {
PRINTF_HOOK_ARGTYPE_END = VSTR_TYPE_FMT_END,
PRINTF_HOOK_ARGTYPE_INT = VSTR_TYPE_FMT_INT,
PRINTF_HOOK_ARGTYPE_POINTER = VSTR_TYPE_FMT_PTR_VOID,
};
/**
* Redefining printf and alike
*/
#include <stdio.h>
#include <stdarg.h>
int vstr_wrapper_printf(const char *format, ...);
int vstr_wrapper_fprintf(FILE *stream, const char *format, ...);
int vstr_wrapper_sprintf(char *str, const char *format, ...);
int vstr_wrapper_snprintf(char *str, size_t size, const char *format, ...);
int vstr_wrapper_asprintf(char **str, const char *format, ...);
int vstr_wrapper_vprintf(const char *format, va_list ap);
int vstr_wrapper_vfprintf(FILE *stream, const char *format, va_list ap);
int vstr_wrapper_vsprintf(char *str, const char *format, va_list ap);
int vstr_wrapper_vsnprintf(char *str, size_t size, const char *format, va_list ap);
int vstr_wrapper_vasprintf(char **str, const char *format, va_list ap);
#ifdef printf
#undef printf
#endif
#ifdef fprintf
#undef fprintf
#endif
#ifdef sprintf
#undef sprintf
#endif
#ifdef snprintf
#undef snprintf
#endif
#ifdef asprintf
#undef asprintf
#endif
#ifdef vprintf
#undef vprintf
#endif
#ifdef vfprintf
#undef vfprintf
#endif
#ifdef vsprintf
#undef vsprintf
#endif
#ifdef vsnprintf
#undef vsnprintf
#endif
#ifdef vasprintf
#undef vasprintf
#endif
#define printf vstr_wrapper_printf
#define fprintf vstr_wrapper_fprintf
#define sprintf vstr_wrapper_sprintf
#define snprintf vstr_wrapper_snprintf
#define asprintf vstr_wrapper_asprintf
#define vprintf vstr_wrapper_vprintf
#define vfprintf vstr_wrapper_vfprintf
#define vsprintf vstr_wrapper_vsprintf
#define vsnprintf vstr_wrapper_vsnprintf
#define vasprintf vstr_wrapper_vasprintf
/**
* Data to pass to a printf hook.
*/
struct printf_hook_data_t {
/**
* Base to append printf to
*/
Vstr_base *base;
/**
* Position in base to write to
*/
size_t pos;
};
/**
* Wrapper around vstr_add_vfmt(), avoids having to link all users of
* print_in_hook() against libvstr.
*
* @param base Vstr_string to add string to
* @param pos position to write to
* @param fmt format string
* @param ... arguments
* @return number of characters written
*/
size_t vstr_print_in_hook(struct Vstr_base *base, size_t pos, const char *fmt,
...);
/**
* Helper macro to be used in printf hook callbacks.
*/
#define print_in_hook(data, fmt, ...) ({\
size_t _written; \
_written = vstr_print_in_hook(data->base, data->pos, fmt, ##__VA_ARGS__);\
data->pos += _written;\
_written;\
})
#endif
/**
* Callback function type for printf hooks.
*
* @param data hook data, to pass to print_in_hook()
* @param spec format specifier
* @param args arguments array
* @return number of characters written
*/
typedef int (*printf_hook_function_t)(printf_hook_data_t *data,
printf_hook_spec_t *spec,
const void *const *args);
/**
* Properties of the format specifier
*/
struct printf_hook_spec_t {
/**
* TRUE if a '#' was used in the format specifier
*/
int hash;
/**
* TRUE if a '-' was used in the format specifier
*/
int minus;
/**
* TRUE if a '+' was used in the format specifier
*/
int plus;
/**
* The width as given in the format specifier.
*/
int width;
};
/**
* Printf handler management.
*/
struct printf_hook_t {
/**
* Register a printf handler.
*
* @param spec printf hook format character
* @param hook hook function
* @param ... list of PRINTF_HOOK_ARGTYPE_*, MUST end with PRINTF_HOOK_ARGTYPE_END
*/
void (*add_handler)(printf_hook_t *this, char spec,
printf_hook_function_t hook, ...);
/**
* Destroy a printf_hook instance.
*/
void (*destroy)(printf_hook_t *this);
};
/**
* Create a printf_hook instance.
*/
printf_hook_t *printf_hook_create();
#endif /** PRINTF_HOOK_H_ @}*/
|
