[Lynx-dev] [PATCH] accept <?xml encoding='UTF-8'?>

[Lennart Jablonka]

Some XHTML pages declared as using UTF-8 are erroneously taken to be
non-UTF-8.

The syntax for encoding declarations allows the use of either ' or " for
the encoding name.  Further, the spec says that the encoding name should
be parsed case-insensitively.

See <https://www.w3.org/TR/2008/REC-xml-20081126/#NT-EncodingDecl>.

diff --git a/WWW/Library/Implementation/SGML.c 
b/WWW/Library/Implementation/SGML.c
index 2534606e..b8cb2cbf 100644
--- a/WWW/Library/Implementation/SGML.c
+++ b/WWW/Library/Implementation/SGML.c
@@ -903,9 +903,9 @@ static void handle_processing_instruction(HTStream *me)
 
            if (t != 0) {
                t += 9;
-               if (*t == '"')
+               if (*t == '"' || *t == '\'')
                    ++t;
-               flag = !StrNCmp(t, "utf-8", 5);
+               flag = !strncasecomp(t, "utf-8", 5);
            }
            if (flag) {
                CTRACE((tfp, "...Use UTF-8 for XML\n"));