Merge branch 'develop' of https://github.com/ONLYOFFICE/core into develop

* 'develop' of https://github.com/ONLYOFFICE/core:
  NSString: + stringWithUtf8Buffer method

DesktopEditor/common/Mac/NSString+StringUtils.h

@@ -44,6 +44,7 @@
 @interface NSString (StringUtils)
 + (id)stringWithWString:(const std::wstring&)string;
 + (id)stringWithAString:(const std::string&)string;
++ (id)stringWithUtf8Buffer:(const char*)string length:(size_t)len;
 + (NSMutableArray*)stringsArray:(const std::vector<std::wstring>&)sources;
 - (std::wstring)stdwstring;
 - (std::string)stdstring;

DesktopEditor/common/Mac/NSString+StringUtils.mm

@@ -30,6 +30,17 @@
                                   encoding:CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingUTF8)];
 }
 
++ (id)stringWithUtf8Buffer:(const char*)string length:(size_t)len
+{
+    if (len < 1) {
+        return @"";
+    }
+
+    return [[NSString alloc] initWithBytes:string
+                                    length:len*sizeof(char)
+                                  encoding:CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingUTF8)];
+}
+
 + (NSMutableArray*)stringsArray:(const std::vector<std::wstring>&)sources {
     size_t count = sources.size();
     NSMutableArray* array = [NSMutableArray arrayWithCapacity:count];
@@ -51,4 +62,4 @@
     return std::string((char*)data.bytes, data.length);
 }
 
-@end
\ No newline at end of file
+@end