95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
#include <errno.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include "log.h"
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const long NSEC_PER_SEC = 1000000000;
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static void log_stderr(enum libseat_log_level level, const char *fmt, va_list args);
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static enum libseat_log_level current_log_level;
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static libseat_log_func current_log_handler = log_stderr;
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static struct timespec start_time = {-1, -1};
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static bool colored = false;
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static const char *verbosity_colors[] = {
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[LIBSEAT_LOG_LEVEL_SILENT] = "",
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[LIBSEAT_LOG_LEVEL_ERROR] = "\x1B[1;31m",
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[LIBSEAT_LOG_LEVEL_INFO] = "\x1B[1;34m",
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[LIBSEAT_LOG_LEVEL_DEBUG] = "\x1B[1;90m",
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};
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static const char *verbosity_headers[] = {
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[LIBSEAT_LOG_LEVEL_SILENT] = "",
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[LIBSEAT_LOG_LEVEL_ERROR] = "[ERROR]",
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[LIBSEAT_LOG_LEVEL_INFO] = "[INFO]",
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[LIBSEAT_LOG_LEVEL_DEBUG] = "[DEBUG]",
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};
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static void timespec_sub(struct timespec *r, const struct timespec *a, const struct timespec *b) {
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r->tv_sec = a->tv_sec - b->tv_sec;
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r->tv_nsec = a->tv_nsec - b->tv_nsec;
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if (r->tv_nsec < 0) {
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r->tv_sec--;
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r->tv_nsec += NSEC_PER_SEC;
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}
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}
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static void log_stderr(enum libseat_log_level level, const char *fmt, va_list args) {
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struct timespec ts = {0};
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clock_gettime(CLOCK_MONOTONIC, &ts);
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timespec_sub(&ts, &ts, &start_time);
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unsigned c = (level < LIBSEAT_LOG_LEVEL_LAST) ? level : LIBSEAT_LOG_LEVEL_LAST - 1;
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const char *prefix, *postfix;
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if (colored) {
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prefix = verbosity_colors[c];
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postfix = "\x1B[0m\n";
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} else {
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prefix = verbosity_headers[c];
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postfix = "\n";
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}
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fprintf(stderr, "%02d:%02d:%02d.%03ld %s ", (int)(ts.tv_sec / 60 / 60),
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(int)(ts.tv_sec / 60 % 60), (int)(ts.tv_sec % 60), ts.tv_nsec / 1000000, prefix);
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vfprintf(stderr, fmt, args);
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fprintf(stderr, "%s", postfix);
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}
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void log_init(enum libseat_log_level level) {
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if (start_time.tv_sec >= 0) {
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return;
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}
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clock_gettime(CLOCK_MONOTONIC, &start_time);
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current_log_level = level;
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colored = isatty(STDERR_FILENO);
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}
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void _logf(enum libseat_log_level level, const char *fmt, ...) {
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int stored_errno = errno;
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va_list args;
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if (level > current_log_level) {
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return;
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}
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va_start(args, fmt);
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current_log_handler(level, fmt, args);
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va_end(args);
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errno = stored_errno;
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}
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void libseat_set_log_handler(libseat_log_func handler) {
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if (handler == NULL) {
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handler = log_stderr;
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}
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current_log_handler = handler;
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}
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