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 <stdarg.h>
  11
  12 #include <git2/trace.h>
  13 #include "buffer.h"
  14
  15 #ifdef GIT_TRACE
  16
  17 struct git_trace_data {
  18         git_trace_level_t level;
  19         git_trace_callback callback;
  20 };
  21
  22 extern struct git_trace_data git_trace__data;
  23
  24 GIT_INLINE(void) git_trace__write_fmt(
  25         git_trace_level_t level,
  26         const char *fmt, ...)
  27 {
  28         git_trace_callback callback = git_trace__data.callback;
  29         git_buf message = GIT_BUF_INIT;
  30         va_list ap;
  31
  32         va_start(ap, fmt);
  33         git_buf_vprintf(&message, fmt, ap);
  34         va_end(ap);
  35
  36         callback(level, git_buf_cstr(&message));
  37
  38         git_buf_free(&message);
  39 }
  40
  41 #define git_trace_level()               (git_trace__data.level)
  42 #define git_trace(l, ...)               { \
  43                                                                         if (git_trace__data.level >= l && \
  44                                                                                 git_trace__data.callback != NULL) { \
  45                                                                                 git_trace__write_fmt(l, __VA_ARGS__); \
  46                                                                         } \
  47                                                                 }
  48
  49 #else
  50
  51 #define git_trace_level()               ((void)0)
  52 #define git_trace(lvl, ...)             ((void)0)
  53
  54 #endif
  55
  56 #endif