[*] Initial commit

lonetix/include/df/utf/utfdef.h

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+/**
+ * \file utf/utfdef.h
+ *
+ * UTF-8 types and macro constants definitions.
+ *
+ * \copyright The DoubleFourteen Code Forge (C) All Rights Reserved
+ * \author    Lorenzo Cogotti
+ */
+
+#ifndef DF_UTFDEF_H_
+#define DF_UTFDEF_H_
+
+#include "xpt.h"
+
+/// 32-bits unsigned type capable of holding any UTF-8 character.
+typedef Uint32 Rune;
+
+#define MAXUTF    4u         ///< Maximum bytes per `Rune`
+#define RUNE_SYNC 0x80       ///< Cannot represent part of a UTF sequence (<)
+#define RUNE_SELF 0x80       ///< `Rune` and UTF sequences are the same (<)
+#define RUNE_ERR  0xfffdu    ///< Decoding error in UTF
+#define MAXRUNE   0x10ffffu  ///< Maximum `Rune` value
+#define BOM       0xefbbbfu  ///< UTF-8 BOM marker
+
+#endif