Rename UTC offset variable; update copyrights

Rename global UTC offset from g_nUtcOffset to g_utc_offset across headers and sources (lib-hal/include/{global.h,utc.h}, lib-clib/src/time.cpp) and update all references and Global accessors/mutator to use the new name. Also adjust localtime() to use the renamed variable. Additionally, update copyright/contact mailto in lib-clib/src/strlen.cpp and lib-widget/src/widget.cpp (info@gd32-dmx.org) and bump the copyright year in lib-clib/src/time.cpp to 2026.

Author: vanvught

lib-clib/src/strlen.cpp

@@ -2,7 +2,7 @@
  * @file strlen.cpp
  *
  */
-/* Copyright (C) 2023-2026 by Arjan van Vught mailto:info@orangepi-dmx.nl
+/* Copyright (C) 2023-2026 by Arjan van Vught mailto:info@gd32-dmx.org
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal

lib-clib/src/time.cpp

@@ -2,7 +2,7 @@
  * @file time.cpp
  *
  */
-/* Copyright (C) 2016-2025 by Arjan van Vught mailto:info@gd32-dmx.org
+/* Copyright (C) 2016-2026 by Arjan van Vught mailto:info@gd32-dmx.org
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -27,7 +27,7 @@
 #include <time.h>
 
 namespace global {
-int32_t g_nUtcOffset = 0;
+int32_t g_utc_offset = 0;
 } // namespace global
 
 static constexpr int kDaysOfMonth[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
@@ -56,7 +56,7 @@ struct tm* localtime(const time_t* t) {
         return nullptr;
     }
 
-    auto time = *t + global::g_nUtcOffset;
+    auto time = *t + global::g_utc_offset;
     return gmtime(&time);
 }
 

lib-hal/include/global.h

@@ -22,7 +22,7 @@
  */
 namespace global
 {
-extern int32_t g_nUtcOffset;
+extern int32_t g_utc_offset;
 }
 
 /**
@@ -49,14 +49,14 @@ class Global
      * @brief Gets the current UTC offset in seconds.
      * @return UTC offset in seconds.
      */
-    int32_t GetUtcOffset() const { return global::g_nUtcOffset; }
+    int32_t GetUtcOffset() const { return global::g_utc_offset; }
 
     /**
      * @brief Gets the current UTC offset as (hours, minutes).
      * @param[out] hours Signed hour component.
      * @param[out] minutes Unsigned minute component.
      */
-    inline void GetUtcOffset(int32_t& hours, uint32_t& minutes) { hal::utc::SplitOffset(global::g_nUtcOffset, hours, minutes); }
+    inline void GetUtcOffset(int32_t& hours, uint32_t& minutes) { hal::utc::SplitOffset(global::g_utc_offset, hours, minutes); }
 
     /**
      * @brief Sets the global UTC offset if the value is valid.
@@ -67,7 +67,7 @@ class Global
     {
         if (hal::utc::IsValidOffset(utc_offset_seconds))
         {
-            ::global::g_nUtcOffset = utc_offset_seconds;
+            ::global::g_utc_offset = utc_offset_seconds;
             return true;
         }
         return false;

lib-hal/include/utc.h

@@ -37,7 +37,7 @@ namespace global
 /**
  * @brief The current UTC offset in seconds.
  */
-extern int32_t g_nUtcOffset;
+extern int32_t g_utc_offset;
 } // namespace global
 
 namespace hal::utc

lib-widget/src/widget.cpp

@@ -6,7 +6,7 @@
  * https://wiki.openlighting.org/index.php/USB_Protocol_Extensions
  *
  */
-/* Copyright (C) 2015-2026 by Arjan van Vught mailto:info@orangepi-dmx.nl
+/* Copyright (C) 2015-2026 by Arjan van Vught mailto:info@gd32-dmx.org
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal