Mark _printflike_ things so we get format warnings.
[darkstat] / str.h
1 /* darkstat 3
2 * copyright (c) 2001-2011 Emil Mikulic.
3 *
4 * str.h: string buffer with pool-based reallocation
5 *
6 * Permission to use, copy, modify, and distribute this file for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include "cdefs.h"
20
21 #include <sys/types.h>
22 #include <stdarg.h>
23
24 /* Note: the contents are 8-bit clean and not zero terminated! */
25
26 struct str;
27
28 struct str *str_make(void);
29 void str_free(struct str *s);
30 void str_extract(struct str *buf, size_t *len, char **str);
31 void str_appendn(struct str *buf, const char *s, const size_t len);
32 void str_appendstr(struct str *buf, const struct str *s);
33
34 #ifdef __GNUC__
35 /* amusing efficiency hack */
36 # include <string.h>
37 # define str_append(buf, s) \
38 str_appendn(buf, s, \
39 (__builtin_constant_p(s) ? sizeof(s)-1 : strlen(s)) )
40 #else
41 void str_append(struct str *buf, const char *s);
42 #endif
43
44 size_t xvasprintf(char **result, const char *format, va_list va)
45 _printflike_(2, 0);
46 size_t xasprintf(char **result, const char *format, ...) _printflike_(2, 3);
47 void str_vappendf(struct str *s, const char *format, va_list va)
48 _printflike_(2, 0);
49 void str_appendf(struct str *s, const char *format, ...) _printflike_(2, 3);
50
51 struct str *length_of_time(const time_t t);
52 ssize_t str_write(const struct str * const buf, const int fd);
53 size_t str_len(const struct str * const buf);
54
55 /* vim:set ts=3 sw=3 tw=78 expandtab: */