1 files changed, 96 insertions, 0 deletions
diff --git a/app/bin/utf8convert.c b/app/bin/utf8convert.c
new file mode 100644
index 0000000..0573c93
--- /dev/null
+++ b/app/bin/utf8convert.c
@@ -0,0 +1,96 @@
+/**
+ * \file utf8convert.c
+ *
+ * UTF8 conversion functions
+ */
+ 
+ /*  XTrackCad - Model Railroad CAD
+  *  Copyright (C) 2020 Martin Fischer
+  *
+  *  This program is free software; you can redistribute it and/or modify
+  *  it under the terms of the GNU General Public License as published by
+  *  the Free Software Foundation; either version 2 of the License, or
+  *  (at your option) any later version.
+  *
+  *  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.
+  *
+  *  You should have received a copy of the GNU General Public License
+  *  along with this program; if not, write to the Free Software
+  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+  */
+
+#include <string.h>
+
+#include <wlib.h>
+#include "misc.h"
+#include "include/utf8convert.h"
+
+/**
+ * Convert to UTF-8. The string must by a dynamically allocated storage block 
+ * allocated with MyMalloc(). The functions returns a pointer to the converted
+ * string. If no conversion was necessary the returned string is identical to
+ * the parameter. Otherwise a new buffer is allocated and returned.
+ *
+ * \param [in] string If non-null, the string.
+ *
+ * \returns a pointer to a MyMalloc'ed string in UTF-8 format.
+ */
+
+char *
+Convert2UTF8( char *string )
+{
+	if (RequiresConvToUTF8(string)) {
+		unsigned cnt = strlen(string) * 2 + 2;
+		unsigned char *out = MyMalloc(cnt);
+		wSystemToUTF8(string, out, cnt);
+		MyFree(string);
+		return(out);
+	} else {
+		return(string);
+	}
+}
+
+/**
+ * Convert a string from UTF-8 to system codepage in place. As the length of
+ * the result most be equal or smaller than the input this is a safe
+ * approach.
+ *
+ * \param [in,out] in the string to be converted
+ */
+
+void
+ConvertUTF8ToSystem(unsigned char *in)
+{
+	if (wIsUTF8(in)) {
+		unsigned cnt = strlen(in) * 2 + 1;
+		unsigned char *out = MyMalloc(cnt);
+		wUTF8ToSystem(in, out, cnt);
+		strcpy(in, out);
+		MyFree(out);
+	}
+}
+
+/**
+ * Requires convert to UTF-8 If at least one character is >127 the string
+ * has to be converted.
+ *
+ * \param [in9 string the string.
+ *
+ * \returns True if conversion is required, false if not.
+ */
+
+bool
+RequiresConvToUTF8(char *string)
+{
+	while (*string) {
+		if (*string++ & 0x7F) {
+			return(true);
+		}
+	}
+	return(false);
+}
+
+