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Introduce libseat_set_log_handler

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This allows libseat users to register a custom logging function.
This commit is contained in:
Simon Ser 2020-08-27 15:56:14 +00:00 • committed by Kenny Levinsen
parent a254fe3692
commit 47d4b43f1a
3 changed files with 60 additions and 26 deletions
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51
common/log.c
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@ -10,7 +10,10 @@
const long NSEC_PER_SEC = 1000000000;
static void log_stderr(enum libseat_log_level level, const char *fmt, va_list args);
static enum libseat_log_level current_log_level;
static libseat_log_func current_log_handler = log_stderr;
static struct timespec start_time = {-1, -1};
static bool colored = false;
@ -37,22 +40,7 @@ static void timespec_sub(struct timespec *r, const struct timespec *a, const str
}
}
void log_init(enum libseat_log_level level) {
if (start_time.tv_sec >= 0) {
return;
}
clock_gettime(CLOCK_MONOTONIC, &start_time);
current_log_level = level;
colored = isatty(STDERR_FILENO);
}
void _logf(enum libseat_log_level level, const char *fmt, ...) {
int stored_errno = errno;
va_list args;
if (level > current_log_level) {
return;
}
static void log_stderr(enum libseat_log_level level, const char *fmt, va_list args) {
struct timespec ts = {0};
clock_gettime(CLOCK_MONOTONIC, &ts);
timespec_sub(&ts, &ts, &start_time);
@ -71,10 +59,37 @@ void _logf(enum libseat_log_level level, const char *fmt, ...) {
fprintf(stderr, "%02d:%02d:%02d.%03ld %s ", (int)(ts.tv_sec / 60 / 60),
(int)(ts.tv_sec / 60 % 60), (int)(ts.tv_sec % 60), ts.tv_nsec / 1000000, prefix);
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
fprintf(stderr, "%s", postfix);
}
void log_init(enum libseat_log_level level) {
if (start_time.tv_sec >= 0) {
return;
}
clock_gettime(CLOCK_MONOTONIC, &start_time);
current_log_level = level;
colored = isatty(STDERR_FILENO);
}
void _logf(enum libseat_log_level level, const char *fmt, ...) {
int stored_errno = errno;
va_list args;
if (level > current_log_level) {
return;
}
va_start(args, fmt);
current_log_handler(level, fmt, args);
va_end(args);
errno = stored_errno;
}
void libseat_set_log_handler(libseat_log_func handler) {
if (handler == NULL) {
handler = log_stderr;
}
current_log_handler = handler;
}