tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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Logging.h (2275B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
      3 * You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 #ifndef Logging_h
      6 #define Logging_h
      7 
      8 #include <cstdlib>
      9 #include "mozilla/Likely.h"
     10 #include "mozilla/MacroArgs.h"
     11 
     12 #ifdef ANDROID
     13 #  include <android/log.h>
     14 #  define LOG(...) \
     15    __android_log_print(ANDROID_LOG_INFO, "GeckoLinker", __VA_ARGS__)
     16 #  define WARN(...) \
     17    __android_log_print(ANDROID_LOG_WARN, "GeckoLinker", __VA_ARGS__)
     18 #  define ERROR(...) \
     19    __android_log_print(ANDROID_LOG_ERROR, "GeckoLinker", __VA_ARGS__)
     20 #else
     21 #  include <cstdio>
     22 
     23 /* Expand to 1 or m depending on whether there is one argument or more
     24 * given. */
     25 #  define MOZ_ONE_OR_MORE_ARGS_IMPL2(_1, _2, _3, _4, _5, _6, _7, _8, _9, N, \
     26                                     ...)                                   \
     27    N
     28 #  define MOZ_ONE_OR_MORE_ARGS_IMPL(args) MOZ_ONE_OR_MORE_ARGS_IMPL2 args
     29 #  define MOZ_ONE_OR_MORE_ARGS(...) \
     30    MOZ_ONE_OR_MORE_ARGS_IMPL((__VA_ARGS__, m, m, m, m, m, m, m, m, 1, 0))
     31 
     32 #  define MOZ_MACRO_GLUE(a, b) a b
     33 
     34 /* Some magic to choose between LOG1 and LOGm depending on the number of
     35 * arguments */
     36 #  define MOZ_CHOOSE_LOG(...)                                          \
     37    MOZ_MACRO_GLUE(MOZ_CONCAT(LOG, MOZ_ONE_OR_MORE_ARGS(__VA_ARGS__)), \
     38                   (__VA_ARGS__))
     39 
     40 #  define LOG1(format) fprintf(stderr, format "\n")
     41 #  define LOGm(format, ...) fprintf(stderr, format "\n", __VA_ARGS__)
     42 #  define LOG(...) MOZ_CHOOSE_LOG(__VA_ARGS__)
     43 #  define WARN(...) MOZ_CHOOSE_LOG("Warning: " __VA_ARGS__)
     44 #  define ERROR(...) MOZ_CHOOSE_LOG("Error: " __VA_ARGS__)
     45 
     46 #endif
     47 
     48 class Logging {
     49 public:
     50  static bool isVerbose() { return Singleton.verbose; }
     51 
     52 private:
     53  bool verbose;
     54 
     55 public:
     56  static void Init() {
     57    const char* env = getenv("MOZ_DEBUG_LINKER");
     58    if (env && *env == '1') Singleton.verbose = true;
     59  }
     60 
     61 private:
     62  static Logging Singleton;
     63 };
     64 
     65 #define DEBUG_LOG(...)                        \
     66  do {                                        \
     67    if (MOZ_UNLIKELY(Logging::isVerbose())) { \
     68      LOG(__VA_ARGS__);                       \
     69    }                                         \
     70  } while (0)
     71 
     72 #endif /* Logging_h */