Add the SPDLOG_USE_WCHAR tweak to enable support for Unicode names on Windows. Refs #111

include/spdlog/common.h

@@ -11,6 +11,11 @@
 #include <memory>
 #include <exception>
 
+#if defined(_WIN32) && defined(SPDLOG_USE_WCHAR)
+#include <codecvt>
+#include <locale>
+#endif
+
 //visual studio does not support noexcept yet
 #ifndef _MSC_VER
 #define SPDLOG_NOEXCEPT noexcept
@@ -95,4 +100,25 @@ private:
 
 };
 
+#if defined(_WIN32) && defined(SPDLOG_USE_WCHAR)
+    #define SPDLOG_FILENAME_T(s) L ## s
+    typedef std::wstring filename_str_t;
+    typedef wchar_t filename_char_t;
+
+    inline std::string filename_to_bytes(const filename_str_t& filename)
+    {
+        std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> c;
+        return c.to_bytes(filename);
+    }
+#else
+    #define SPDLOG_FILENAME_T(s) s
+    typedef std::string filename_str_t;
+    typedef char filename_char_t;
+
+    inline std::string filename_to_bytes(const filename_str_t& filename)
+    {
+        return filename;
+    }
+#endif
+
 } //spdlog

include/spdlog/details/file_helper.h

@@ -43,11 +43,11 @@ public:
     }
 
 
-    void open(const std::string& fname, bool truncate = false)
+    void open(const filename_str_t& fname, bool truncate = false)
     {
 
         close();
-        const char* mode = truncate ? "wb" : "ab";
+        const filename_char_t* mode = truncate ? SPDLOG_FILENAME_T("wb") : SPDLOG_FILENAME_T("ab");
         _filename = fname;
         for (int tries = 0; tries < open_tries; ++tries)
         {
@@ -57,7 +57,7 @@ public:
             std::this_thread::sleep_for(std::chrono::milliseconds(open_interval));
         }
 
-        throw spdlog_ex("Failed opening file " + fname + " for writing");
+        throw spdlog_ex("Failed opening file " + filename_to_bytes(_filename) + " for writing");
     }
 
     void reopen(bool truncate)
@@ -88,7 +88,7 @@ public:
         size_t msg_size = msg.formatted.size();
         auto data = msg.formatted.data();
         if (std::fwrite(data, 1, msg_size, _fd) != msg_size)
-            throw spdlog_ex("Failed writing to file " + _filename);
+            throw spdlog_ex("Failed writing to file " + filename_to_bytes(_filename));
 
         if (_force_flush)
             std::fflush(_fd);
@@ -98,19 +98,19 @@ public:
     long size()
     {
         if (!_fd)
-            throw spdlog_ex("Cannot use size() on closed file " + _filename);
+            throw spdlog_ex("Cannot use size() on closed file " + filename_to_bytes(_filename));
 
         auto pos = ftell(_fd);
         if (fseek(_fd, 0, SEEK_END) != 0)
-            throw spdlog_ex("fseek failed on file " + _filename);
+            throw spdlog_ex("fseek failed on file " + filename_to_bytes(_filename));
 
         auto file_size = ftell(_fd);
 
         if(fseek(_fd, pos, SEEK_SET) !=0)
-            throw spdlog_ex("fseek failed on file " + _filename);
+            throw spdlog_ex("fseek failed on file " + filename_to_bytes(_filename));
 
         if (file_size == -1)
-            throw spdlog_ex("ftell failed on file " + _filename);
+            throw spdlog_ex("ftell failed on file " + filename_to_bytes(_filename));
 
 
         return file_size;
@@ -118,12 +118,12 @@ public:
 
     }
 
-    const std::string& filename() const
+    const filename_str_t& filename() const
     {
         return _filename;
     }
 
-    static bool file_exists(const std::string& name)
+    static bool file_exists(const filename_str_t& name)
     {
 
         return os::file_exists(name);
@@ -133,7 +133,7 @@ public:
 
 private:
     FILE* _fd;
-    std::string _filename;
+    filename_str_t _filename;
     bool _force_flush;
 
 

include/spdlog/details/os.h

@@ -137,24 +137,49 @@ constexpr inline unsigned short eol_size()
 #endif
 
 //fopen_s on non windows for writing
-inline int fopen_s(FILE** fp, const std::string& filename, const char* mode)
+inline int fopen_s(FILE** fp, const filename_str_t& filename, const filename_char_t* mode)
 {
 #ifdef _WIN32
+#ifdef SPDLOG_USE_WCHAR
+    *fp = _wfsopen((filename.c_str()), mode, _SH_DENYWR);
+#else
     *fp = _fsopen((filename.c_str()), mode, _SH_DENYWR);
+#endif
     return *fp == nullptr;
 #else
     *fp = fopen((filename.c_str()), mode);
     return *fp == nullptr;
 #endif
+}
 
+inline int remove(const filename_char_t* filename)
+{
+#if defined(_WIN32) && defined(SPDLOG_USE_WCHAR)
+    return _wremove(filename);
+#else
+    return std::remove(filename);
+#endif
+}
+
+inline int rename(const filename_char_t* filename1, const filename_char_t* filename2)
+{
+#if defined(_WIN32) && defined(SPDLOG_USE_WCHAR)
+    return _wrename(filename1, filename2);
+#else
+    return std::rename(filename1, filename2);
+#endif
 }
 
 
 //Return if file exists
-inline bool file_exists(const std::string& filename)
+inline bool file_exists(const filename_str_t& filename)
 {
 #ifdef _WIN32
+#ifdef SPDLOG_USE_WCHAR
+    auto attribs = GetFileAttributesW(filename.c_str());
+#else
     auto attribs = GetFileAttributesA(filename.c_str());
+#endif
     return (attribs != INVALID_FILE_ATTRIBUTES && !(attribs & FILE_ATTRIBUTE_DIRECTORY));
 #elif __linux__
     struct stat buffer;
@@ -169,7 +194,6 @@ inline bool file_exists(const std::string& filename)
     return false;
 
 #endif
-
 }
 
 //Return utc offset in minutes or throw spdlog_ex on failure

include/spdlog/details/spdlog_impl.h

@@ -36,24 +36,25 @@ inline void spdlog::drop(const std::string &name)
 }
 
 // Create multi/single threaded rotating file logger
-inline std::shared_ptr<spdlog::logger> spdlog::rotating_logger_mt(const std::string& logger_name, const std::string& filename, size_t max_file_size, size_t max_files, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::rotating_logger_mt(const std::string& logger_name, const filename_str_t& filename, size_t max_file_size, size_t max_files, bool force_flush)
 {
-    return create<spdlog::sinks::rotating_file_sink_mt>(logger_name, filename, "txt", max_file_size, max_files, force_flush);
+    return create<spdlog::sinks::rotating_file_sink_mt>(logger_name, filename, SPDLOG_FILENAME_T("txt"), max_file_size, max_files, force_flush);
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::rotating_logger_st(const std::string& logger_name, const std::string& filename, size_t max_file_size, size_t max_files, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::rotating_logger_st(const std::string& logger_name, const filename_str_t& filename, size_t max_file_size, size_t max_files, bool force_flush)
 {
-    return create<spdlog::sinks::rotating_file_sink_st>(logger_name, filename, "txt", max_file_size, max_files, force_flush);
+    return create<spdlog::sinks::rotating_file_sink_st>(logger_name, filename, SPDLOG_FILENAME_T("txt"), max_file_size, max_files, force_flush);
 }
 
 // Create file logger which creates new file at midnight):
-inline std::shared_ptr<spdlog::logger> spdlog::daily_logger_mt(const std::string& logger_name, const std::string& filename, int hour, int minute, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::daily_logger_mt(const std::string& logger_name, const filename_str_t& filename, int hour, int minute, bool force_flush)
 {
-    return create<spdlog::sinks::daily_file_sink_mt>(logger_name, filename, "txt", hour, minute, force_flush);
+    return create<spdlog::sinks::daily_file_sink_mt>(logger_name, filename, SPDLOG_FILENAME_T("txt"), hour, minute, force_flush);
 }
-inline std::shared_ptr<spdlog::logger> spdlog::daily_logger_st(const std::string& logger_name, const std::string& filename, int hour, int minute, bool force_flush)
+
+inline std::shared_ptr<spdlog::logger> spdlog::daily_logger_st(const std::string& logger_name, const filename_str_t& filename, int hour, int minute, bool force_flush)
 {
-    return create<spdlog::sinks::daily_file_sink_st>(logger_name, filename, "txt", hour, minute, force_flush);
+    return create<spdlog::sinks::daily_file_sink_st>(logger_name, filename, SPDLOG_FILENAME_T("txt"), hour, minute, force_flush);
 }
 
 // Create stdout/stderr loggers (with optinal color support)

include/spdlog/sinks/file_sinks.h

@@ -28,7 +28,7 @@ template<class Mutex>
 class simple_file_sink : public base_sink < Mutex >
 {
 public:
-    explicit simple_file_sink(const std::string &filename,
+    explicit simple_file_sink(const filename_str_t &filename,
                               bool force_flush = false) :
         _file_helper(force_flush)
     {
@@ -58,7 +58,7 @@ template<class Mutex>
 class rotating_file_sink : public base_sink < Mutex >
 {
 public:
-    rotating_file_sink(const std::string &base_filename, const std::string &extension,
+    rotating_file_sink(const filename_str_t &base_filename, const filename_str_t &extension,
                        std::size_t max_size, std::size_t max_files,
                        bool force_flush = false) :
         _base_filename(base_filename),
@@ -90,13 +90,13 @@ protected:
     }
 
 private:
-    static std::string calc_filename(const std::string& filename, std::size_t index, const std::string& extension)
+    static filename_str_t calc_filename(const filename_str_t& filename, std::size_t index, const filename_str_t& extension)
     {
-        fmt::MemoryWriter w;
+        std::conditional<std::is_same<filename_char_t, char>::value, fmt::MemoryWriter, fmt::WMemoryWriter>::type w;
         if (index)
-            w.write("{}.{}.{}", filename, index, extension);
+            w.write(SPDLOG_FILENAME_T("{}.{}.{}"), filename, index, extension);
         else
-            w.write("{}.{}", filename, extension);
+            w.write(SPDLOG_FILENAME_T("{}.{}"), filename, extension);
         return w.str();
     }
 
@@ -111,25 +111,25 @@ private:
         _file_helper.close();
         for (auto i = _max_files; i > 0; --i)
         {
-            std::string src = calc_filename(_base_filename, i - 1, _extension);
+            filename_str_t src = calc_filename(_base_filename, i - 1, _extension);
-            std::string target = calc_filename(_base_filename, i, _extension);
+            filename_str_t target = calc_filename(_base_filename, i, _extension);
 
             if (details::file_helper::file_exists(target))
             {
-                if (std::remove(target.c_str()) != 0)
+                if (details::os::remove(target.c_str()) != 0)
                 {
-                    throw spdlog_ex("rotating_file_sink: failed removing " + target);
+                    throw spdlog_ex("rotating_file_sink: failed removing " + filename_to_bytes(target));
                 }
             }
-            if (details::file_helper::file_exists(src) && std::rename(src.c_str(), target.c_str()))
+            if (details::file_helper::file_exists(src) && details::os::rename(src.c_str(), target.c_str()))
             {
-                throw spdlog_ex("rotating_file_sink: failed renaming " + src + " to " + target);
+                throw spdlog_ex("rotating_file_sink: failed renaming " + filename_to_bytes(src) + " to " + filename_to_bytes(target));
             }
         }
         _file_helper.reopen(true);
     }
-    std::string _base_filename;
+    filename_str_t _base_filename;
-    std::string _extension;
+    filename_str_t _extension;
     std::size_t _max_size;
     std::size_t _max_files;
     std::size_t _current_size;
@@ -148,8 +148,8 @@ class daily_file_sink :public base_sink < Mutex >
 public:
     //create daily file sink which rotates on given time
     daily_file_sink(
-        const std::string& base_filename,
+        const filename_str_t& base_filename,
-        const std::string& extension,
+        const filename_str_t& extension,
         int rotation_hour,
         int rotation_minute,
         bool force_flush = false) : _base_filename(base_filename),
@@ -198,16 +198,16 @@ private:
     }
 
     //Create filename for the form basename.YYYY-MM-DD.extension
-    static std::string calc_filename(const std::string& basename, const std::string& extension)
+    static filename_str_t calc_filename(const filename_str_t& basename, const filename_str_t& extension)
     {
         std::tm tm = spdlog::details::os::localtime();
-        fmt::MemoryWriter w;
+        std::conditional<std::is_same<filename_char_t, char>::value, fmt::MemoryWriter, fmt::WMemoryWriter>::type w;
-        w.write("{}_{:04d}-{:02d}-{:02d}_{:02d}-{:02d}.{}", basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, extension);
+        w.write(SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}_{:02d}-{:02d}.{}"), basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, extension);
         return w.str();
     }
 
-    std::string _base_filename;
+    filename_str_t _base_filename;
-    std::string _extension;
+    filename_str_t _extension;
     int _rotation_h;
     int _rotation_m;
     std::chrono::system_clock::time_point _rotation_tp;

include/spdlog/spdlog.h

@@ -61,15 +61,14 @@ void set_sync_mode();
 //
 // Create and register multi/single threaded rotating file logger
 //
-std::shared_ptr<logger> rotating_logger_mt(const std::string& logger_name, const std::string& filenameB, size_t max_file_size, size_t max_files, bool force_flush = false);
+std::shared_ptr<logger> rotating_logger_mt(const std::string& logger_name, const filename_str_t& filename, size_t max_file_size, size_t max_files, bool force_flush = false);
-std::shared_ptr<logger> rotating_logger_st(const std::string& logger_name, const std::string& filename, size_t max_file_size, size_t max_files, bool force_flush = false);
+std::shared_ptr<logger> rotating_logger_st(const std::string& logger_name, const filename_str_t& filename, size_t max_file_size, size_t max_files, bool force_flush = false);
 
 //
 // Create file logger which creates new file on the given time (default in  midnight):
 //
-std::shared_ptr<logger> daily_logger_mt(const std::string& logger_name, const std::string& filename, int hour=0, int minute=0, bool force_flush = false);
+std::shared_ptr<logger> daily_logger_mt(const std::string& logger_name, const filename_str_t& filename, int hour=0, int minute=0, bool force_flush = false);
-std::shared_ptr<logger> daily_logger_st(const std::string& logger_name, const std::string& filename, int hour=0, int minute=0, bool force_flush = false);
+std::shared_ptr<logger> daily_logger_st(const std::string& logger_name, const filename_str_t& filename, int hour=0, int minute=0, bool force_flush = false);
-
 
 //
 // Create and register stdout/stderr loggers

include/spdlog/tweakme.h

@@ -51,3 +51,9 @@
 // Note that upon creating a logger the registry is modified by spdlog..
 // #define SPDLOG_NO_REGISTRY_MUTEX
 ///////////////////////////////////////////////////////////////////////////////
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Uncomment to enable usage of wchar_t for file names on Windows.
+// #define SPDLOG_USE_WCHAR
+///////////////////////////////////////////////////////////////////////////////