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 "common.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_cb 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         va_list ap)
  28 {
  29         git_trace_cb callback = git_trace__data.callback;
  30         git_buf message = GIT_BUF_INIT;
  31
  32         git_buf_vprintf(&message, fmt, ap);
  33
  34         callback(level, git_buf_cstr(&message));
  35
  36         git_buf_dispose(&message);
  37 }
  38
  39 #define git_trace_level()       (git_trace__data.level)
  40
  41 GIT_INLINE(void) git_trace(git_trace_level_t level, const char *fmt, ...)
  42 {
  43         if (git_trace__data.level >= level &&
  44             git_trace__data.callback != NULL) {
  45                 va_list ap;
  46
  47                 va_start(ap, fmt);
  48                 git_trace__write_fmt(level, fmt, ap);
  49                 va_end(ap);
  50         }
  51 }
  52
  53 #else
  54
  55 GIT_INLINE(void) git_trace__null(
  56         git_trace_level_t level,
  57         const char *fmt, ...)
  58 {
  59         GIT_UNUSED(level);
  60         GIT_UNUSED(fmt);
  61 }
  62
  63 #define git_trace_level()       ((git_trace_level_t)0)
  64 #define git_trace               git_trace__null
  65
  66 #endif
  67
  68 #endif