Replaced include guards with #pragma onceHEADmaster

Thanks to https://github.com/cgmb/guardonce and a follow-up replace to
remove duplicated newlines at end of file:

    find src -type f -name '*.h' -exec \
      sed --in-place -e :a -e '/^\n*$/{$d;N;};/\n$/ba' {} \;

Source: https://unix.stackexchange.com/questions/81685/how-to-remove-multiple-newlines-at-eof

Fixes compile on macOS, which appears to have been due to the EVENT_H
include guard.

14 files changed, 15 insertions, 52 deletions

diff --git a/src/utils/base64.h b/src/utils/base64.h
index 92c23016..8fc7e79f 100644
--- a/src/utils/base64.h
+++ b/src/utils/base64.h
@@ -27,10 +27,7 @@
    +----------------------------------------------------------------------+
  */
 
-#ifndef BASE64_H
-#define BASE64_H
+#pragma once
 
 extern unsigned char *php3_base64_encode(const unsigned char *, int, int *);
 extern unsigned char *php3_base64_decode(const unsigned char *, int, int *);
-
-#endif /* BASE64_H */
diff --git a/src/utils/copynpaste.h b/src/utils/copynpaste.h
index b6aa0de0..83e48891 100644
--- a/src/utils/copynpaste.h
+++ b/src/utils/copynpaste.h
@@ -18,6 +18,8 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+
 #include <string>
 
 /**
diff --git a/src/utils/dtor.h b/src/utils/dtor.h
index 76c68725..79b374d0 100644
--- a/src/utils/dtor.h
+++ b/src/utils/dtor.h
@@ -19,8 +19,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef UTILS_DTOR_H
-#define UTILS_DTOR_H
+#pragma once
 
 #include <algorithm>
 #include <utility>
@@ -48,5 +47,3 @@ inline void delete_all(Container &c)
 {
     std::for_each(c.begin(), c.end(), make_dtor(c));
 }
-
-#endif
diff --git a/src/utils/gettext.h b/src/utils/gettext.h
index f3b12ada..1f40a4be 100644
--- a/src/utils/gettext.h
+++ b/src/utils/gettext.h
@@ -19,8 +19,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef UTILS_GETTEXT_H
-#define UTILS_GETTEXT_H
+#pragma once
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
@@ -40,5 +39,3 @@
 #define N_(s) ((char const *)s)
 
 #endif
-
-#endif // UTILS_GETTEXT_H
diff --git a/src/utils/mathutils.h b/src/utils/mathutils.h
index 21eba16f..0a169df5 100644
--- a/src/utils/mathutils.h
+++ b/src/utils/mathutils.h
@@ -19,8 +19,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef UTILS_MATHUTILS_H
-#define UTILS_MATHUTILS_H
+#pragma once
 
 /* A very fast function to calculate the approximate inverse square root of a
  * floating point value and a helper function that uses it for getting the
@@ -57,5 +56,3 @@ inline float weightedAverage(float n1, float n2, float w)
 
     return w * n2 + (1.0f - w) * n1;
 }
-
-#endif // UTILS_MATHUTILS_H
diff --git a/src/utils/mkdir.h b/src/utils/mkdir.h
index 3bd76145..817c79df 100644
--- a/src/utils/mkdir.h
+++ b/src/utils/mkdir.h
@@ -18,9 +18,6 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef MKDIR_H
-#define MKDIR_H
+#pragma once
 
 int mkdir_r(const char *pathname);
-
-#endif
diff --git a/src/utils/mutex.h b/src/utils/mutex.h
index b4661c70..3e01eb76 100644
--- a/src/utils/mutex.h
+++ b/src/utils/mutex.h
@@ -19,8 +19,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef MUTEX_H
-#define MUTEX_H
+#pragma once
 
 #include "log.h"
 
@@ -103,5 +102,3 @@ inline MutexLocker::~MutexLocker()
     if (mMutex)
         mMutex->unlock();
 }
-
-#endif // MUTEX_H
diff --git a/src/utils/path.h b/src/utils/path.h
index 5338c74e..0b7019eb 100644
--- a/src/utils/path.h
+++ b/src/utils/path.h
@@ -18,8 +18,7 @@
  *  along with The Mana Server.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef UTILS_PATH_H
-#define UTILS_PATH_H
+#pragma once
 
 #include <string>
 
@@ -29,5 +28,3 @@ namespace utils
     std::string joinPaths(std::string_view path1, std::string_view path2);
     std::string cleanPath(const std::string &path);
 }
-
-#endif // UTILS_PATH_H
diff --git a/src/utils/sha256.h b/src/utils/sha256.h
index 8a9c2b70..6c2c3107 100644
--- a/src/utils/sha256.h
+++ b/src/utils/sha256.h
@@ -19,8 +19,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef UTILS_SHA256_H
-#define UTILS_SHA256_H
+#pragma once
 
 #include <string>
 
@@ -31,5 +30,3 @@
  * @return the SHA-256 hash for the given string.
  */
 std::string sha256(const std::string &string);
-
-#endif // UTILS_SHA256_H
diff --git a/src/utils/specialfolder.h b/src/utils/specialfolder.h
index 36a4e0c1..9e069310 100644
--- a/src/utils/specialfolder.h
+++ b/src/utils/specialfolder.h
@@ -18,8 +18,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef SPECIALFOLDER_H
-#define SPECIALFOLDER_H
+#pragma once
 
 #ifdef _WIN32
 #include <shlobj.h>
@@ -31,5 +30,3 @@ std::string getSpecialFolderLocation(const KNOWNFOLDERID &folderId);
 #include <string>
 std::string getResourcesLocation();
 #endif
-
-#endif
diff --git a/src/utils/stringutils.h b/src/utils/stringutils.h
index e7ff1332..8781a9c4 100644
--- a/src/utils/stringutils.h
+++ b/src/utils/stringutils.h
@@ -19,8 +19,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef UTILS_STRINGUTILS_H
-#define UTILS_STRINGUTILS_H
+#pragma once
 
 #include <optional>
 #include <sstream>
@@ -221,5 +220,3 @@ std::string getHostNameFromURL(const std::string &url);
  * separator.
  */
 std::string join(const std::vector<std::string> &strings, const char *separator);
-
-#endif // UTILS_STRINGUTILS_H
diff --git a/src/utils/time.h b/src/utils/time.h
index 58b8164a..590041e3 100644
--- a/src/utils/time.h
+++ b/src/utils/time.h
@@ -19,8 +19,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
- #ifndef UTILS_TIME_H
- #define UTILS_TIME_H
+#pragma once
 
 #include <cstdint>
 
@@ -107,5 +106,3 @@ public:
 private:
     uint32_t mTimeout = 0;
 };
-
-#endif // UTILS_TIME_H
diff --git a/src/utils/xml.h b/src/utils/xml.h
index 13c06988..787504bb 100644
--- a/src/utils/xml.h
+++ b/src/utils/xml.h
@@ -19,8 +19,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef XML_H
-#define XML_H
+#pragma once
 
 #include "utils/stringutils.h"
 
@@ -295,5 +294,3 @@ namespace XML
         xmlTextWriterWriteString(mWriter, BAD_CAST text.c_str());
     }
 }
-
-#endif // XML_H
diff --git a/src/utils/zlib.h b/src/utils/zlib.h
index 53dfd613..74853bd6 100644
--- a/src/utils/zlib.h
+++ b/src/utils/zlib.h
@@ -19,8 +19,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef UTILS_ZLIB_H
-#define UTILS_ZLIB_H
+#pragma once
 
 #include <string>
 
@@ -44,5 +43,3 @@ int inflateMemory(unsigned char *in, unsigned int inLength,
  *         uncompressed, or <code>NULL</code> on fail.
  */
 void *loadCompressedFile(const std::string &filename, int &filesize);
-
-#endif // UTILS_ZLIB_H