1 files changed, 65 insertions, 0 deletions
diff --git a/src/util.cpp b/src/util.cpp
new file mode 100644
index 0000000..1d0601a
--- /dev/null
+++ b/src/util.cpp
@@ -0,0 +1,65 @@
+#include "util.hpp"
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+struct strftime_cache {
+   time_t time;
+   char buf[128];
+};
+
+static void log_(char const *log_type, FILE *stream, char const *fmt,
+                 va_list args) {
+   static struct strftime_cache strft;
+
+   time_t t = time(NULL);
+   if (t != strft.time) {
+      strft.time = t;
+      struct tm tm;
+      struct tm *tmp = localtime_r(&t, &tm);
+      strftime(strft.buf, sizeof(strft.buf), "%Y-%m-%dT%H:%M:%S", tmp);
+   }
+
+   fputs(program_invocation_short_name, stream);
+   fputs("  ", stream);
+   fputs(strft.buf, stream);
+   fputs("  ", stream);
+   fputs(log_type, stream);
+   fputs("  ", stream);
+   vfprintf(stream, fmt, args);
+   fputs("\n", stream);
+}
+
+void lognotice(char const *fmt, ...) {
+   va_list a;
+   va_start(a, fmt);
+   log_("notice", stdout, fmt, a);
+   va_end(a);
+}
+
+void logerror(char const *fmt, ...) {
+   va_list a;
+   va_start(a, fmt);
+   log_("error", stderr, fmt, a);
+   va_end(a);
+}
+
+void fatal(char const *fmt, ...) {
+   va_list a;
+   va_start(a, fmt);
+   log_("fatal", stderr, fmt, a);
+   va_end(a);
+   abort();
+}
+
+#ifdef DEBUG_OUTPUT
+void logdebug(char const *fmt, ...) {
+   va_list a;
+   va_start(a, fmt);
+   log_("debug", stdout, fmt, a);
+   va_end(a);
+}
+#endif