1 files changed, 48 insertions, 0 deletions
diff --git a/src/drm/drm_util.c b/src/drm/drm_util.c
new file mode 100644
index 00000000..4f6535a8
--- /dev/null
+++ b/src/drm/drm_util.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2022 Google LLC
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <stdarg.h>
+#include <string.h>
+
+#include "drm_util.h"
+#include "virgl_util.h"
+
+#include "util/macros.h"
+
+void
+_drm_log(const char *fmt, ...)
+{
+   const char prefix[] = "drm: ";
+   char line[1024];
+   size_t len;
+   va_list va;
+   int ret;
+
+   len = ARRAY_SIZE(prefix) - 1;
+   memcpy(line, prefix, len);
+
+   va_start(va, fmt);
+   ret = vsnprintf(line + len, ARRAY_SIZE(line) - len, fmt, va);
+   va_end(va);
+
+   if (ret < 0) {
+      const char log_error[] = "log error";
+      memcpy(line + len, log_error, ARRAY_SIZE(log_error) - 1);
+      len += ARRAY_SIZE(log_error) - 1;
+   } else if ((size_t)ret < ARRAY_SIZE(line) - len) {
+      len += ret;
+   } else {
+      len = ARRAY_SIZE(line) - 1;
+   }
+
+   /* make room for newline */
+   if (len + 1 >= ARRAY_SIZE(line))
+      len--;
+
+   line[len++] = '\n';
+   line[len] = '\0';
+
+   virgl_log("%s", line);
+}