Basic utf8 support for B&W radios

2022-06-11 15:38:08 +02:00
parent 86152da85d
commit 30e3ac3399
10 changed files with 259 additions and 77 deletions
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) EdgeTX
+ *
+ * Based on code named
+ *   opentx - https://github.com/opentx/opentx
+ *   th9x - http://code.google.com/p/th9x
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program 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 General Public License for more details.
+ */
+/* -*- coding: utf-8 -*- */
+
+#include <stdint.h>
+#include "definitions.h"
+
+#if defined(TRANSLATIONS_FR)
+static wchar_t _utf8_lut[] = {
+  L'é', L'è', L'à', L'î', L'ç',
+};
+#elif defined(TRANSLATIONS_DE)
+static wchar_t _utf8_lut[] = {
+  L'Ä', L'ä', L'Ö', L'ö', L'Ü', L'ü', L'ß',
+};
+#elif defined(TRANSLATIONS_CZ)
+static wchar_t _utf8_lut[] = {
+  L'á', L'č', L'é', L'ě', L'í', L'ó', L'ř',
+  L'š', L'ú', L'ů', L'ý', L'Í', L'Ř', L'Ý',
+  L'ž', L'É',
+};
+#elif defined(TRANSLATIONS_ES)
+static wchar_t _utf8_lut[] = {
+  L'Ñ', L'ñ', L'Á', L'á', L'É', L'é', L'Í',
+  L'í', L'Ó', L'ó', L'ú',
+};
+#elif defined(TRANSLATIONS_FI)
+static wchar_t _utf8_lut[] = {
+  L'å', L'ä', L'ö', L'Å', L'Ä', L'Ö',
+};
+#elif defined(TRANSLATIONS_IT)
+static wchar_t _utf8_lut[] = {
+  L'à', L'ù',
+};
+#elif defined(TRANSLATIONS_PL)
+static wchar_t _utf8_lut[] = {
+  L'ą', L'ć', L'ę', L'ł', L'ń', L'ó', L'ś',
+  L'ż', L'ź', L'Ą', L'Ć', L'Ę', L'Ł', L'Ń',
+  L'Ó', L'Ś', L'Ż', L'Ź',
+};
+#else
+  #define NO_UTF8_LUT
+#endif
+
+#if !defined(NO_UTF8_LUT)
+static unsigned char lookup_utf8_mapping(wchar_t w)
+{
+  for (int i=0; i < DIM(_utf8_lut); i++) {
+    if (w == _utf8_lut[i])
+      return 0x95 + (uint8_t)i; // TODO: use constant
+  }
+  return 0x20; // return 'space' for unknown chars
+}
+#endif
+
+unsigned char map_utf8_char(const char*& s, uint8_t& len)
+{
+  unsigned char c = *s;
+  if ((c & 0xC0) == 0xC0) {
+    wchar_t w = (c & 0x1F) << 6;
+    if (!len) return 0;
+    len--; s++; c = *s;
+    w |= c & 0x3F;
+    // TODO: use constants
+    if (w >= 0x80 && w <= 0x94) { // extra chars
+      return (unsigned char)w;
+    }
+#if !defined(NO_UTF8_LUT)
+    return lookup_utf8_mapping(w);
+#else
+    return 0x20;
+#endif
+  }
+
+  return c;
+}
+