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
|
/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
* \brief Utility functions
*/
#ifndef _ASTERISK_UTILS_H
#define _ASTERISK_UTILS_H
#include "asterisk/compat.h"
#include <netinet/in.h>
#include <arpa/inet.h> /* we want to override inet_ntoa */
#include <netdb.h>
#include <limits.h>
#include "asterisk/lock.h"
#include "asterisk/time.h"
#include "asterisk/strings.h"
/*! \note
\verbatim
Note:
It is very important to use only unsigned variables to hold
bit flags, as otherwise you can fall prey to the compiler's
sign-extension antics if you try to use the top two bits in
your variable.
The flag macros below use a set of compiler tricks to verify
that the caller is using an "unsigned int" variable to hold
the flags, and nothing else. If the caller uses any other
type of variable, a warning message similar to this:
warning: comparison of distinct pointer types lacks cast
will be generated.
The "dummy" variable below is used to make these comparisons.
Also note that at -O2 or above, this type-safety checking
does _not_ produce any additional object code at all.
\endverbatim
*/
extern unsigned int __unsigned_int_flags_dummy;
#define ast_test_flag(p,flag) ({ \
typeof ((p)->flags) __p = (p)->flags; \
typeof (__unsigned_int_flags_dummy) __x = 0; \
(void) (&__p == &__x); \
((p)->flags & (flag)); \
})
#define ast_set_flag(p,flag) do { \
typeof ((p)->flags) __p = (p)->flags; \
typeof (__unsigned_int_flags_dummy) __x = 0; \
(void) (&__p == &__x); \
((p)->flags |= (flag)); \
} while(0)
#define ast_clear_flag(p,flag) do { \
typeof ((p)->flags) __p = (p)->flags; \
typeof (__unsigned_int_flags_dummy) __x = 0; \
(void) (&__p == &__x); \
((p)->flags &= ~(flag)); \
} while(0)
#define ast_copy_flags(dest,src,flagz) do { \
typeof ((dest)->flags) __d = (dest)->flags; \
typeof ((src)->flags) __s = (src)->flags; \
typeof (__unsigned_int_flags_dummy) __x = 0; \
(void) (&__d == &__x); \
(void) (&__s == &__x); \
(dest)->flags &= ~(flagz); \
(dest)->flags |= ((src)->flags & (flagz)); \
} while (0)
#define ast_set2_flag(p,value,flag) do { \
typeof ((p)->flags) __p = (p)->flags; \
typeof (__unsigned_int_flags_dummy) __x = 0; \
(void) (&__p == &__x); \
if (value) \
(p)->flags |= (flag); \
else \
(p)->flags &= ~(flag); \
} while (0)
/* Non-type checking variations for non-unsigned int flags. You
should only use non-unsigned int flags where required by
protocol etc and if you know what you're doing :) */
#define ast_test_flag_nonstd(p,flag) ({ \
((p)->flags & (flag)); \
})
#define ast_set_flag_nonstd(p,flag) do { \
((p)->flags |= (flag)); \
} while(0)
#define ast_clear_flag_nonstd(p,flag) do { \
((p)->flags &= ~(flag)); \
} while(0)
#define ast_copy_flags_nonstd(dest,src,flagz) do { \
(dest)->flags &= ~(flagz); \
(dest)->flags |= ((src)->flags & (flagz)); \
} while (0)
#define ast_set2_flag_nonstd(p,value,flag) do { \
if (value) \
(p)->flags |= (flag); \
else \
(p)->flags &= ~(flag); \
} while (0)
#define AST_FLAGS_ALL UINT_MAX
struct ast_flags {
unsigned int flags;
};
struct ast_hostent {
struct hostent hp;
char buf[1024];
};
struct hostent *ast_gethostbyname(const char *host, struct ast_hostent *hp);
/* ast_md5_hash
\brief Produces MD5 hash based on input string */
void ast_md5_hash(char *output, char *input);
int ast_base64encode(char *dst, const unsigned char *src, int srclen, int max);
int ast_base64decode(unsigned char *dst, const char *src, int max);
/*! ast_uri_encode
\brief Turn text string to URI-encoded %XX version
At this point, we're converting from ISO-8859-x (8-bit), not UTF8
as in the SIP protocol spec
If doreserved == 1 we will convert reserved characters also.
RFC 2396, section 2.4
outbuf needs to have more memory allocated than the instring
to have room for the expansion. Every char that is converted
is replaced by three ASCII characters.
\param string String to be converted
\param outbuf Resulting encoded string
\param buflen Size of output buffer
\param doreserved Convert reserved characters
*/
char *ast_uri_encode(char *string, char *outbuf, int buflen, int doreserved);
/*! \brief Decode URI, URN, URL (overwrite string)
\param s String to be decoded
*/
void ast_uri_decode(char *s);
static force_inline void ast_slinear_saturated_add(short *input, short *value)
{
int res;
res = (int) *input + *value;
if (res > 32767)
*input = 32767;
else if (res < -32767)
*input = -32767;
else
*input = (short) res;
}
static force_inline void ast_slinear_saturated_multiply(short *input, short *value)
{
int res;
res = (int) *input * *value;
if (res > 32767)
*input = 32767;
else if (res < -32767)
*input = -32767;
else
*input = (short) res;
}
static force_inline void ast_slinear_saturated_divide(short *input, short *value)
{
*input /= *value;
}
int test_for_thread_safety(void);
const char *ast_inet_ntoa(char *buf, int bufsiz, struct in_addr ia);
#ifdef inet_ntoa
#undef inet_ntoa
#endif
#define inet_ntoa __dont__use__inet_ntoa__use__ast_inet_ntoa__instead__
int ast_utils_init(void);
int ast_wait_for_input(int fd, int ms);
/*! Compares the source address and port of two sockaddr_in */
static force_inline int inaddrcmp(const struct sockaddr_in *sin1, const struct sockaddr_in *sin2)
{
return ((sin1->sin_addr.s_addr != sin2->sin_addr.s_addr)
|| (sin1->sin_port != sin2->sin_port));
}
#define AST_STACKSIZE 256 * 1024
#define ast_pthread_create(a,b,c,d) ast_pthread_create_stack(a,b,c,d,0)
int ast_pthread_create_stack(pthread_t *thread, pthread_attr_t *attr, void *(*start_routine)(void *), void *data, size_t stacksize);
/*!
\brief Process a string to find and replace characters
\param start The string to analyze
\param find The character to find
\param replace_with The character that will replace the one we are looking for
*/
char *ast_process_quotes_and_slashes(char *start, char find, char replace_with);
#ifndef HAVE_GETLOADAVG
int getloadavg(double *list, int nelem);
#endif
#endif /* _ASTERISK_UTILS_H */
|
