MOVEONLY: Move logging code from util.{h,cpp} to new files.

src/logging.h

@@ -0,0 +1,125 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_LOGGING_H
+#define BITCOIN_LOGGING_H
+
+#include <fs.h>
+#include <tinyformat.h>
+
+#include <atomic>
+#include <cstdint>
+#include <string>
+#include <vector>
+
+static const bool DEFAULT_LOGTIMEMICROS = false;
+static const bool DEFAULT_LOGIPS        = false;
+static const bool DEFAULT_LOGTIMESTAMPS = true;
+extern const char * const DEFAULT_DEBUGLOGFILE;
+
+extern bool fPrintToConsole;
+extern bool fPrintToDebugLog;
+
+extern bool fLogTimestamps;
+extern bool fLogTimeMicros;
+extern bool fLogIPs;
+extern std::atomic<bool> fReopenDebugLog;
+
+extern std::atomic<uint32_t> logCategories;
+
+struct CLogCategoryActive
+{
+    std::string category;
+    bool active;
+};
+
+namespace BCLog {
+    enum LogFlags : uint32_t {
+        NONE        = 0,
+        NET         = (1 <<  0),
+        TOR         = (1 <<  1),
+        MEMPOOL     = (1 <<  2),
+        HTTP        = (1 <<  3),
+        BENCH       = (1 <<  4),
+        ZMQ         = (1 <<  5),
+        DB          = (1 <<  6),
+        RPC         = (1 <<  7),
+        ESTIMATEFEE = (1 <<  8),
+        ADDRMAN     = (1 <<  9),
+        SELECTCOINS = (1 << 10),
+        REINDEX     = (1 << 11),
+        CMPCTBLOCK  = (1 << 12),
+        RAND        = (1 << 13),
+        PRUNE       = (1 << 14),
+        PROXY       = (1 << 15),
+        MEMPOOLREJ  = (1 << 16),
+        LIBEVENT    = (1 << 17),
+        COINDB      = (1 << 18),
+        QT          = (1 << 19),
+        LEVELDB     = (1 << 20),
+        ALL         = ~(uint32_t)0,
+    };
+}
+/** Return true if log accepts specified category */
+static inline bool LogAcceptCategory(uint32_t category)
+{
+    return (logCategories.load(std::memory_order_relaxed) & category) != 0;
+}
+
+/** Returns a string with the log categories. */
+std::string ListLogCategories();
+
+/** Returns a vector of the active log categories. */
+std::vector<CLogCategoryActive> ListActiveLogCategories();
+
+/** Return true if str parses as a log category and set the flags in f */
+bool GetLogCategory(uint32_t *f, const std::string *str);
+
+/** Send a string to the log output */
+int LogPrintStr(const std::string &str);
+
+/** Get format string from VA_ARGS for error reporting */
+template<typename... Args> std::string FormatStringFromLogArgs(const char *fmt, const Args&... args) { return fmt; }
+
+static inline void MarkUsed() {}
+template<typename T, typename... Args> static inline void MarkUsed(const T& t, const Args&... args)
+{
+    (void)t;
+    MarkUsed(args...);
+}
+
+// Be conservative when using LogPrintf/error or other things which
+// unconditionally log to debug.log! It should not be the case that an inbound
+// peer can fill up a user's disk with debug.log entries.
+
+#ifdef USE_COVERAGE
+#define LogPrintf(...) do { MarkUsed(__VA_ARGS__); } while(0)
+#define LogPrint(category, ...) do { MarkUsed(__VA_ARGS__); } while(0)
+#else
+#define LogPrintf(...) do { \
+    if (fPrintToConsole || fPrintToDebugLog) { \
+        std::string _log_msg_; /* Unlikely name to avoid shadowing variables */ \
+        try { \
+            _log_msg_ = tfm::format(__VA_ARGS__); \
+        } catch (tinyformat::format_error &fmterr) { \
+            /* Original format string will have newline so don't add one here */ \
+            _log_msg_ = "Error \"" + std::string(fmterr.what()) + "\" while formatting log message: " + FormatStringFromLogArgs(__VA_ARGS__); \
+        } \
+        LogPrintStr(_log_msg_); \
+    } \
+} while(0)
+
+#define LogPrint(category, ...) do { \
+    if (LogAcceptCategory((category))) { \
+        LogPrintf(__VA_ARGS__); \
+    } \
+} while(0)
+#endif
+
+fs::path GetDebugLogPath();
+bool OpenDebugLog();
+void ShrinkDebugFile();
+
+#endif // BITCOIN_LOGGING_H