1 /*
2 * Copyright 2022 Google LLC
3 * SPDX-License-Identifier: MIT
4 */
5
6 #include <stdarg.h>
7 #include <string.h>
8
9 #include "drm_util.h"
10 #include "virgl_util.h"
11
12 #include "util/macros.h"
13
14 void
_drm_log(const char * fmt,...)15 _drm_log(const char *fmt, ...)
16 {
17 const char prefix[] = "drm: ";
18 char line[1024];
19 size_t len;
20 va_list va;
21 int ret;
22
23 len = ARRAY_SIZE(prefix) - 1;
24 memcpy(line, prefix, len);
25
26 va_start(va, fmt);
27 ret = vsnprintf(line + len, ARRAY_SIZE(line) - len, fmt, va);
28 va_end(va);
29
30 if (ret < 0) {
31 const char log_error[] = "log error";
32 memcpy(line + len, log_error, ARRAY_SIZE(log_error) - 1);
33 len += ARRAY_SIZE(log_error) - 1;
34 } else if ((size_t)ret < ARRAY_SIZE(line) - len) {
35 len += ret;
36 } else {
37 len = ARRAY_SIZE(line) - 1;
38 }
39
40 /* make room for newline */
41 if (len + 1 >= ARRAY_SIZE(line))
42 len--;
43
44 line[len++] = '\n';
45 line[len] = '\0';
46
47 virgl_log("%s", line);
48 }
49