include: Correct header guard names

Also, the combination of `#pragma once` and header guards is now
used. This should speed up compilation in case `#pragma once` is
supported.

11 files changed, 116 insertions, 25 deletions

diff --git a/include/djinterop/album_art.hpp b/include/djinterop/album_art.hpp
index 7202f77..7619b18 100644
--- a/include/djinterop/album_art.hpp
+++ b/include/djinterop/album_art.hpp
@@ -15,13 +15,14 @@
     along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+#ifndef DJINTEROP_ALBUM_ART_HPP
+#define DJINTEROP_ALBUM_ART_HPP
+
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
 #endif
 
-#ifndef DJINTEROP_ALBUM_ART_HPP
-#define DJINTEROP_ALBUM_ART_HPP
-
 #include <chrono>
 #include <cstdint>
 #include <memory>
diff --git a/include/djinterop/crate.hpp b/include/djinterop/crate.hpp
index e1dbdf2..fc7045b 100644
--- a/include/djinterop/crate.hpp
+++ b/include/djinterop/crate.hpp
@@ -15,13 +15,14 @@
     along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+#ifndef DJINTEROP_CRATE_HPP
+#define DJINTEROP_CRATE_HPP
+
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
 #endif
 
-#ifndef DJINTEROP_CRATE_HPP
-#define DJINTEROP_CRATE_HPP
-
 #include <memory>
 #include <stdexcept>
 #include <string>
diff --git a/include/djinterop/database.hpp b/include/djinterop/database.hpp
index 3a93762..3b73ac3 100644
--- a/include/djinterop/database.hpp
+++ b/include/djinterop/database.hpp
@@ -15,13 +15,14 @@
     along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+#ifndef DJINTEROP_DATABASE_HPP
+#define DJINTEROP_DATABASE_HPP
+
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
 #endif
 
-#ifndef DJINTEROP_DATABASE_HPP
-#define DJINTEROP_DATABASE_HPP
-
 #include <memory>
 #include <vector>
 
diff --git a/include/djinterop/djinterop.hpp b/include/djinterop/djinterop.hpp
index 5e78144..669fae0 100644
--- a/include/djinterop/djinterop.hpp
+++ b/include/djinterop/djinterop.hpp
@@ -1,4 +1,23 @@
+/*
+    This file is part of libdjinterop.
+
+    libdjinterop is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    libdjinterop is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #pragma once
+#ifndef DJINTEROP_DJINTEROP_HPP
+#define DJINTEROP_DJINTEROP_HPP
 
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
@@ -13,4 +32,6 @@
 #include <djinterop/pad_color.hpp>
 #include <djinterop/performance_data.hpp>
 #include <djinterop/semantic_version.hpp>
-#include <djinterop/track.hpp>
\ No newline at end of file
+#include <djinterop/track.hpp>
+
+#endif  // DJINTEROP_DJINTEROP_HPP
diff --git a/include/djinterop/enginelibrary.hpp b/include/djinterop/enginelibrary.hpp
index 5a957cf..d119561 100644
--- a/include/djinterop/enginelibrary.hpp
+++ b/include/djinterop/enginelibrary.hpp
@@ -1,4 +1,23 @@
+/*
+    This file is part of libdjinterop.
+
+    libdjinterop is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    libdjinterop is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #pragma once
+#ifndef DJINTEROP_ENGINELIBRARY_HPP
+#define DJINTEROP_ENGINELIBRARY_HPP
 
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
@@ -54,3 +73,5 @@ std::string perfdata_db_path(const database& db);
 
 }  // namespace enginelibrary
 }  // namespace djinterop
+
+#endif  // DJINTEROP_ENGINELIBRARY_HPP
diff --git a/include/djinterop/exceptions.hpp b/include/djinterop/exceptions.hpp
index 2373760..d94ee3a 100644
--- a/include/djinterop/exceptions.hpp
+++ b/include/djinterop/exceptions.hpp
@@ -1,4 +1,23 @@
+/*
+    This file is part of libdjinterop.
+
+    libdjinterop is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    libdjinterop is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #pragma once
+#ifndef DJINTEROP_EXCEPTIONS_HPP
+#define DJINTEROP_EXCEPTIONS_HPP
 
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
@@ -119,3 +138,5 @@ private:
 };
 
 }  // namespace djinterop
+
+#endif  // DJINTEROP_EXCEPTIONS_HPP
diff --git a/include/djinterop/musical_key.hpp b/include/djinterop/musical_key.hpp
index db3b032..c87cfa3 100644
--- a/include/djinterop/musical_key.hpp
+++ b/include/djinterop/musical_key.hpp
@@ -15,13 +15,14 @@
     along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+#ifndef DJINTEROP_MUSICAL_KEY_HPP
+#define DJINTEROP_MUSICAL_KEY_HPP
+
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
 #endif
 
-#ifndef DJINTEROP_MUSICAL_KEY_HPP
-#define DJINTEROP_MUSICAL_KEY_HPP
-
 namespace djinterop
 {
 /**
diff --git a/include/djinterop/pad_color.hpp b/include/djinterop/pad_color.hpp
index dbe0164..ea3be5c 100644
--- a/include/djinterop/pad_color.hpp
+++ b/include/djinterop/pad_color.hpp
@@ -15,13 +15,14 @@
     along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+#ifndef DJINTEROP_PAD_COLOR_HPP
+#define DJINTEROP_PAD_COLOR_HPP
+
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
 #endif
 
-#ifndef DJINTEROP_ENGINELIBRARY_PAD_COLOR_HPP
-#define DJINTEROP_ENGINELIBRARY_PAD_COLOR_HPP
-
 namespace djinterop
 {
 /**
@@ -95,4 +96,4 @@ const pad_color pads[] = {pad_1, pad_2, pad_3, pad_4,
 
 }  // namespace djinterop
 
-#endif  // DJINTEROP_ENGINELIBRARY_PAD_COLOR_HPP
+#endif  // DJINTEROP_PAD_COLOR_HPP
diff --git a/include/djinterop/performance_data.hpp b/include/djinterop/performance_data.hpp
index 35f1199..a8f8f33 100644
--- a/include/djinterop/performance_data.hpp
+++ b/include/djinterop/performance_data.hpp
@@ -15,13 +15,14 @@
     along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+#ifndef DJINTEROP_PERFORMANCE_DATA_HPP
+#define DJINTEROP_PERFORMANCE_DATA_HPP
+
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
 #endif
 
-#ifndef DJINTEROP_ENGINELIBRARY_PERFORMANCE_DATA_HPP
-#define DJINTEROP_ENGINELIBRARY_PERFORMANCE_DATA_HPP
-
 #include <chrono>
 #include <cstdint>
 #include <memory>
@@ -89,4 +90,4 @@ struct waveform_entry
 
 }  // namespace djinterop
 
-#endif  // DJINTEROP_ENGINELIBRARY_PERFORMANCE_DATA_HPP
+#endif  // DJINTEROP_PERFORMANCE_DATA_HPP
diff --git a/include/djinterop/semantic_version.hpp b/include/djinterop/semantic_version.hpp
index d28975b..514f912 100644
--- a/include/djinterop/semantic_version.hpp
+++ b/include/djinterop/semantic_version.hpp
@@ -1,4 +1,23 @@
+/*
+    This file is part of libdjinterop.
+
+    libdjinterop is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    libdjinterop is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #pragma once
+#ifndef DJINTEROP_SEMANTIC_VERSION_HPP
+#define DJINTEROP_SEMANTIC_VERSION_HPP
 
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
@@ -68,3 +87,5 @@ inline bool operator<(const semantic_version &a, const semantic_version &b)
 }
 
 }  // namespace djinterop
+
+#endif  // DJINTEROP_SEMANTIC_VERSION_HPP
diff --git a/include/djinterop/track.hpp b/include/djinterop/track.hpp
index 7e6907e..2efbf16 100644
--- a/include/djinterop/track.hpp
+++ b/include/djinterop/track.hpp
@@ -15,13 +15,14 @@
     along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+#ifndef DJINTEROP_TRACK_HPP
+#define DJINTEROP_TRACK_HPP
+
 #if __cplusplus < 201103L && _MSVC_LANG < 201103L
 #error This library needs at least a C++11 compliant compiler
 #endif
 
-#ifndef DJINTEROP_ENGINELIBRARY_TRACK_HPP
-#define DJINTEROP_ENGINELIBRARY_TRACK_HPP
-
 #include <chrono>
 #include <memory>
 #include <stdexcept>
@@ -323,4 +324,4 @@ private:
 
 }  // namespace djinterop
 
-#endif  // DJINTEROP_ENGINELIBRARY_TRACK_HPP
+#endif  // DJINTEROP_TRACK_HPP