1 files changed, 51 insertions, 0 deletions
diff --git a/src/libgit2/trace.h b/src/libgit2/trace.h
new file mode 100644
index 000000000..239928dcb
--- /dev/null
+++ b/src/libgit2/trace.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_trace_h__
+#define INCLUDE_trace_h__
+
+#include "common.h"
+
+#include <git2/trace.h>
+#include "str.h"
+
+struct git_trace_data {
+	git_trace_level_t level;
+	git_trace_cb callback;
+};
+
+extern struct git_trace_data git_trace__data;
+
+GIT_INLINE(void) git_trace__write_fmt(
+	git_trace_level_t level,
+	const char *fmt,
+	va_list ap)
+{
+	git_trace_cb callback = git_trace__data.callback;
+	git_str message = GIT_STR_INIT;
+
+	git_str_vprintf(&message, fmt, ap);
+
+	callback(level, git_str_cstr(&message));
+
+	git_str_dispose(&message);
+}
+
+#define git_trace_level()	(git_trace__data.level)
+
+GIT_INLINE(void) git_trace(git_trace_level_t level, const char *fmt, ...)
+{
+	if (git_trace__data.level >= level &&
+	    git_trace__data.callback != NULL) {
+		va_list ap;
+
+		va_start(ap, fmt);
+		git_trace__write_fmt(level, fmt, ap);
+		va_end(ap);
+	}
+}
+
+#endif