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         void *callback_payload;
  19 };
  20
  21 extern struct git_trace_data git_trace__data;
  22
  23 GIT_INLINE(void) git_trace__write_fmt(
  24         git_trace_level_t level,
  25         void *message_payload,
  26         const char *fmt,
  27         ...)
  28 {
  29         git_trace_callback callback = git_trace__data.callback;
  30         git_buf message = GIT_BUF_INIT;
  31         va_list ap;
  32
  33         va_start(ap, fmt);
  34         git_buf_vprintf(&message, fmt, ap);
  35         va_end(ap);
  36
  37         callback(
  38                 level, git_trace__data.callback_payload, message_payload,
  39                 git_buf_cstr(&message));
  40
  41         git_buf_free(&message);
  42 }
  43
  44 #define git_trace_level()               (git_trace__data.level)
  45 #define git_trace(l, p, ...)    do { \
  46         if ((git_trace__data.level & (l)) != 0 && git_trace__data.callback) { \
  47                 git_trace__write_fmt((l), (p), __VA_ARGS__); \
  48         } } while (0)
  49
  50 #else
  51
  52 #define git_trace_level()               ((void)0)
  53 #define git_trace(lvl, ...)             ((void)0)
  54
  55 #endif
  56
  57 #endif