src/trace.h

   1 /*
   2  * Copyright (C) the libgit2 contributors. All rights reserved.
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7 #ifndef INCLUDE_trace_h__
   8 #define INCLUDE_trace_h__
   9
  10 #include <git2/trace.h>
  11 #include "buffer.h"
  12
  13 #ifdef GIT_TRACE
  14
  15 struct git_trace_data {
  16         git_trace_level_t level;
  17         git_trace_callback callback;
  18 };
  19
  20 extern struct git_trace_data git_trace__data;
  21
  22 GIT_INLINE(void) git_trace__write_fmt(
  23         git_trace_level_t level,
  24         const char *fmt, ...)
  25 {
  26         git_trace_callback callback = git_trace__data.callback;
  27         git_buf message = GIT_BUF_INIT;
  28         va_list ap;
  29
  30         va_start(ap, fmt);
  31         git_buf_vprintf(&message, fmt, ap);
  32         va_end(ap);
  33
  34         callback(level, git_buf_cstr(&message));
  35
  36         git_buf_free(&message);
  37 }
  38
  39 #define git_trace_level()               (git_trace__data.level)
  40 #define git_trace(l, ...)               { \
  41                                                                         if (git_trace__data.level >= l && \
  42                                                                                 git_trace__data.callback != NULL) { \
  43                                                                                 git_trace__write_fmt(l, __VA_ARGS__); \
  44                                                                         } \
  45                                                                 }
  46
  47 #else
  48
  49 #define git_trace_level()               ((void)0)
  50 #define git_trace(lvl, ...)             ((void)0)
  51
  52 #endif
  53
  54 #endif