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#ifndef WARNP_H_
#define WARNP_H_
#include <errno.h>
#include <stddef.h>
/* Avoid namespace collisions with BSD <err.h>. */
#define warn libcperciva_warn
#define warnx libcperciva_warnx
/*
* Maximum length of messages sent to syslog; longer warnings will
* be truncated.
*/
#define WARNP_SYSLOG_MAX_LINE 4095
/**
* warnp_setprogname(progname):
* Set the program name to be used by warn() and warnx() to ${progname}.
*/
void warnp_setprogname(const char *);
#define WARNP_INIT do { \
if (argv[0] != NULL) \
warnp_setprogname(argv[0]); \
} while (0)
/**
* warnp_syslog(enable):
* Send future messages to syslog if ${enable} is non-zero. Messages to
* syslog will be truncated at WARNP_SYSLOG_MAX_LINE characters.
*/
void warnp_syslog(int);
/**
* warnp_syslog_priority(priority):
* Tag future syslog messages with priority ${priority}. Do not enable
* syslog messages; for that, use warnp_syslog().
*/
void warnp_syslog_priority(int);
/* As in BSD <err.h>. */
void warn(const char *, ...);
void warnx(const char *, ...);
/*
* If compiled with DEBUG defined, print __FILE__ and __LINE__.
*/
#ifdef DEBUG
#define warnline do { \
warnx("%s, %d", __FILE__, __LINE__); \
} while (0)
#else
#define warnline
#endif
/*
* Call warn(3) or warnx(3) depending upon whether errno == 0; and clear
* errno (so that the standard error message isn't repeated later).
*/
#define warnp(...) do { \
warnline; \
if (errno != 0) { \
warn(__VA_ARGS__); \
errno = 0; \
} else \
warnx(__VA_ARGS__); \
} while (0)
/*
* Call warnx(3) and set errno == 0. Unlike warnp(), this should be used
* in cases where we're reporting a problem which we discover ourselves
* rather than one which is reported to us from a library or the kernel.
*/
#define warn0(...) do { \
warnline; \
warnx(__VA_ARGS__); \
errno = 0; \
} while (0)
#endif /* !WARNP_H_ */
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