1 files changed, 45 insertions, 0 deletions
diff --git a/src/log.c b/src/log.c
new file mode 100644
index 0000000..616803f
--- /dev/null
+++ b/src/log.c
@@ -0,0 +1,45 @@
+#include "log.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+#include "util.h"
+
+static int g_level = LOG_INFO;
+
+void log_set_level(int level)
+{
+    g_level = level;
+}
+
+int log_level_from_name(const char *name)
+{
+    if (!name)
+        return LOG_INFO;
+    if (strcmp(name, "error") == 0)
+        return LOG_ERROR;
+    if (strcmp(name, "warn") == 0)
+        return LOG_WARN;
+    if (strcmp(name, "info") == 0)
+        return LOG_INFO;
+    if (strcmp(name, "debug") == 0)
+        return LOG_DEBUG;
+    return LOG_INFO;
+}
+
+void log_msg(int level, const char *fmt, ...)
+{
+    if (level > g_level)
+        return;
+    static const char *names[] = { "error", "warn", "info", "debug" };
+    char ts[32];
+    util_iso8601(util_now(), ts, sizeof ts);
+    fprintf(stderr, "%s [%s] ", ts, names[level]);
+    va_list ap;
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    va_end(ap);
+    fputc('\n', stderr);
+}