Add support for wchar_t on Windows

include/spdlog/common.h

@@ -36,6 +36,15 @@
 #define SPDLOG_NOEXCEPT throw()
 #endif
 
+#if defined(WIN32) && defined(SPDLOG_USE_WCHAR)
+typedef std::wstring tstring;
+typedef wchar_t tchar;
+#define S(s) L ## s
+#else
+#define S(s) s
+typedef std::string tstring;
+typedef char tchar;
+#endif
 
 namespace spdlog
 {

include/spdlog/details/file_helper.h

@@ -62,11 +62,11 @@ class file_helper
     }
 
 
-    void open(const std::string& fname, bool truncate=false)
+    void open(const tstring& fname, bool truncate=false)
     {
 
         close();
-        const char* mode = truncate ? "wb" : "ab";
+        const tchar* mode = truncate ? S("wb") : S("ab");
         _filename = fname;
         for (int tries = 0; tries < open_tries; ++tries)
         {
@@ -76,7 +76,7 @@ class file_helper
             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 for writing");
     }
 
     void reopen(bool truncate)
@@ -106,22 +106,22 @@ class file_helper
         size_t size = msg.formatted.size();
         auto data = msg.formatted.data();
         if(std::fwrite(data, 1, size, _fd) != size)
-            throw spdlog_ex("Failed writing to file " + _filename);
+            throw spdlog_ex("Failed writing to file");
 
         if(_force_flush)
             std::fflush(_fd);
 
     }
 
-    const std::string& filename() const
+    const tstring& filename() const
     {
         return _filename;
     }
 
-    static bool file_exists(const std::string& name)
+    static bool file_exists(const tstring& name)
     {
         FILE* file;
-        if (!os::fopen_s(&file, name.c_str(), "r"))
+        if (!os::fopen_s(&file, name.c_str(), S("r")))
         {
             fclose(file);
             return true;
@@ -134,7 +134,7 @@ class file_helper
 
 private:
     FILE* _fd;
-    std::string _filename;
+    tstring _filename;
     bool _force_flush;
 
 

include/spdlog/details/format.h

@@ -2638,6 +2638,12 @@ class BasicMemoryWriter : public BasicWriter<Char> {
 typedef BasicMemoryWriter<char> MemoryWriter;
 typedef BasicMemoryWriter<wchar_t> WMemoryWriter;
 
+#if defined(WIN32) && defined(SPDLOG_USE_WCHAR)
+#define TMemoryWriter WMemoryWriter
+#else
+#define TMemoryWriter MemoryWriter
+#endif
+
 /**
 \rst
 This class template provides operations for formatting and writing data
@@ -3152,4 +3158,4 @@ FMT_VARIADIC(int, fprintf, std::FILE *, CStringRef)
 # include "format.cc"
 #endif
 
-#endif  // FMT_FORMAT_H_
+#endif  // FMT_FORMAT_H_

include/spdlog/details/os.h

@@ -147,17 +147,37 @@ 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 tstring& filename, const tchar* mode)
 {
-#ifdef _WIN32
+#if defined(WIN32)
+  #if defined(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 tchar* filename)
+{
+#if defined(WIN32) && defined(SPDLOG_USE_WCHAR)
+    return _wremove(filename);
+#else
+    return std::remove(filename);
+#endif
+}
 
+inline int rename(const tchar* filename1, const tchar* filename2)
+{
+#if defined(WIN32) && defined(SPDLOG_USE_WCHAR)
+    return _wrename(filename1, filename2);
+#else
+    return std::rename(filename1, filename2);
+#endif
 }
 
 //Return utc offset in minutes or -1 on failure

include/spdlog/details/spdlog_impl.h

@@ -48,24 +48,24 @@ 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 tstring& 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, S("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 tstring& 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, S("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 tstring& 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, S("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 tstring& 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, S("txt"), hour, minute, force_flush);
 }
 
 

include/spdlog/sinks/file_sinks.h

@@ -29,6 +29,7 @@
 #include "../details/null_mutex.h"
 #include "../details/file_helper.h"
 #include "../details/format.h"
+#include "../details/os.h"
 
 namespace spdlog
 {
@@ -71,7 +72,7 @@ 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 tstring &base_filename, const tstring &extension,
                        std::size_t max_size, std::size_t max_files,
                        bool force_flush = false) :
         _base_filename(base_filename),
@@ -102,13 +103,13 @@ class rotating_file_sink : public base_sink < Mutex >
     }
 
 private:
-    static std::string calc_filename(const std::string& filename, std::size_t index, const std::string& extension)
+    static tstring calc_filename(const tstring& filename, std::size_t index, const tstring& extension)
     {
-        fmt::MemoryWriter w;
+        fmt::TMemoryWriter w;
         if (index)
-            w.write("{}.{}.{}", filename, index, extension);
+            w.write(S("{}.{}.{}"), filename, index, extension);
         else
-            w.write("{}.{}", filename, extension);
+            w.write(S("{}.{}"), filename, extension);
         return w.str();
     }
 
@@ -123,25 +124,25 @@ class rotating_file_sink : public base_sink < Mutex >
         _file_helper.close();
         for (auto i = _max_files; i > 0; --i)
         {
-            std::string src = calc_filename(_base_filename, i - 1, _extension);
-            std::string target = calc_filename(_base_filename, i, _extension);
+            tstring src = calc_filename(_base_filename, i - 1, _extension);
+            tstring 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");
                 }
             }
-            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");
             }
         }
         _file_helper.reopen(true);
     }
-    std::string _base_filename;
-    std::string _extension;
+    tstring _base_filename;
+    tstring _extension;
     std::size_t _max_size;
     std::size_t _max_files;
     std::size_t _current_size;
@@ -160,8 +161,8 @@ 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 std::string& extension,
+        const tstring& base_filename,
+        const tstring& extension,
         int rotation_hour,
         int rotation_minute,
         bool force_flush = false) : _base_filename(base_filename),
@@ -210,16 +211,16 @@ class daily_file_sink :public base_sink < Mutex >
     }
 
     //Create filename for the form basename.YYYY-MM-DD.extension
-    static std::string calc_filename(const std::string& basename, const std::string& extension)
+    static tstring calc_filename(const tstring& basename, const tstring& extension)
     {
         std::tm tm = spdlog::details::os::localtime();
-        fmt::MemoryWriter 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);
+        fmt::TMemoryWriter w;
+        w.write(S("{}_{: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;
-    std::string _extension;
+    tstring _base_filename;
+    tstring _extension;
     int _rotation_h;
     int _rotation_m;
     std::chrono::system_clock::time_point _rotation_tp;

include/spdlog/spdlog.h

@@ -76,14 +76,14 @@ 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& 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_mt(const std::string& logger_name, const tstring& 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 tstring& 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_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_mt(const std::string& logger_name, const tstring& filename, int hour=0, int minute=0, bool force_flush = false);
+std::shared_ptr<logger> daily_logger_st(const std::string& logger_name, const tstring& filename, int hour=0, int minute=0, bool force_flush = false);
 
 
 //

include/spdlog/tweakme.h

@@ -72,3 +72,9 @@
 // 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
+///////////////////////////////////////////////////////////////////////////////