1 files changed, 69 insertions, 0 deletions
diff --git a/plugins/DbChecker/src/utf.cpp b/plugins/DbChecker/src/utf.cpp
new file mode 100644
index 0000000000..ffb73d3280
--- /dev/null
+++ b/plugins/DbChecker/src/utf.cpp
@@ -0,0 +1,69 @@
+/*
+
+Miranda IM: the free IM client for Microsoft* Windows*
+
+Copyright 2000-2009 Miranda ICQ/IM project,
+all portions of this codebase are copyrighted to the people
+listed in contributors.txt.
+
+ Copyright 2000 Alexandre Julliard of Wine project 
+ (UTF-8 conversion routines)
+
+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 "dbchecker.h"
+
+bool is_utf8_string(const char* str)
+{
+	int expect_bytes = 0, utf_found = 0;
+
+	if (!str) return 0;
+
+	while (*str) {
+		if ((*str & 0x80) == 0) {
+			/* Looks like an ASCII character */
+			if (expect_bytes)
+				/* byte of UTF-8 character expected */
+				return 0;
+		}
+		else {
+			/* Looks like byte of an UTF-8 character */
+			if (expect_bytes) {
+				/* expect_bytes already set: first byte of UTF-8 char already seen */
+				if ((*str & 0xC0) != 0x80) {
+					/* again first byte ?!?! */
+					return 0;
+				}
+			}
+			else {
+				/* First byte of the UTF-8 character */
+				/* count initial one bits and set expect_bytes to 1 less */
+				char ch = *str;
+				while (ch & 0x80) {
+					expect_bytes++;
+					ch = (ch & 0x7f) << 1;
+				}
+			}
+			/* OK, next byte of UTF-8 character */
+			/* Decrement number of expected bytes */
+			if (--expect_bytes == 0)
+				utf_found = 1;
+		}
+		str++;
+	}
+
+	return (utf_found && expect_bytes == 0);
+}