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1 #ifndef _WARNP_H_
2 #define _WARNP_H_
3
4 #include <errno.h>
5 #include <stddef.h>
6
7 /* Avoid namespace collisions with BSD <err.h>. */
8 #define warn libcperciva_warn
9 #define warnx libcperciva_warnx
10
11 /**
12 * warnp_setprogname(progname):
13 * Set the program name to be used by warn() and warnx() to ${progname}.
14 */
15 void warnp_setprogname(const char *);
16 #define WARNP_INIT do { \
17 if (argv[0] != NULL) \
18 warnp_setprogname(argv[0]); \
19 } while (0)
20
21 /* As in BSD <err.h>. */
22 void warn(const char *, ...);
23 void warnx(const char *, ...);
24
25 /*
26 * If compiled with DEBUG defined, print __FILE__ and __LINE__.
27 */
28 #ifdef DEBUG
29 #define warnline do { \
30 warnx("%s, %d", __FILE__, __LINE__); \
31 } while (0)
32 #else
33 #define warnline
34 #endif
35
36 /*
37 * Call warn(3) or warnx(3) depending upon whether errno == 0; and clear
38 * errno (so that the standard error message isn't repeated later).
39 */
40 #define warnp(...) do { \
41 warnline; \
42 if (errno != 0) { \
43 warn(__VA_ARGS__); \
44 errno = 0; \
45 } else \
46 warnx(__VA_ARGS__); \
47 } while (0)
48
49 /*
50 * Call warnx(3) and set errno == 0. Unlike warnp, this should be used
51 * in cases where we're reporting a problem which we discover ourselves
52 * rather than one which is reported to us from a library or the kernel.
53 */
54 #define warn0(...) do { \
55 warnline; \
56 warnx(__VA_ARGS__); \
57 errno = 0; \
58 } while (0)
59
60 #endif /* !_WARNP_H_ */
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