Merge branch sverker/remove-latin1-atom-encoding/OTP-14337

* sverker/remove-latin1-atom-encoding:
  kernel: Fix erl_distribution_wb_SUITE:whitebox
  kernel: Remove pg2_SUITE:compat
  erts: Remove fun_r13_SUITE
  stdlib: Remove test cases for R12 io protocol
  kernel: Make DFLAG_UTF8_ATOMS mandatory
  kernel: Rewrite distribution flag verification
  tools: Update assumptions in lcnt about external atom format
  stdlib: Tweak beam_lib_SUITE whitebox assumptions
  orber: Remove hard dependency to external atom format
  kernel: Try mend disk_log whitebox tests
  erts: Mark latin1 atom encoding as deprecated
  jinterface: Do not generate atoms on old latin1 external format
  erl_interface: Do not generate atoms on old latin1 ext format
  erts: Do not generate atoms on old latin1 external format
  erts: Fix faulty ASSERT for failed dec_term

1 files changed, 7 insertions, 22 deletions

diff --git a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpOutputStream.java b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpOutputStream.java
index dca2eb7c51..e1718f8380 100644
--- a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpOutputStream.java
+++ b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpOutputStream.java
@@ -403,7 +403,6 @@ public class OtpOutputStream extends ByteArrayOutputStream {
     public void write_atom(final String atom) {
         String enc_atom;
         byte[] bytes;
-        boolean isLatin1 = true;
 
         if (atom.codePointCount(0, atom.length()) <= OtpExternal.maxAtomLength) {
             enc_atom = atom;
@@ -416,29 +415,15 @@ public class OtpOutputStream extends ByteArrayOutputStream {
                     OtpExternal.maxAtomLength);
         }
 
-        for (int offset = 0; offset < enc_atom.length();) {
-            final int cp = enc_atom.codePointAt(offset);
-            if ((cp & ~0xFF) != 0) {
-                isLatin1 = false;
-                break;
-            }
-            offset += Character.charCount(cp);
-        }
         try {
-            if (isLatin1) {
-                bytes = enc_atom.getBytes("ISO-8859-1");
-                write1(OtpExternal.atomTag);
-                write2BE(bytes.length);
+            bytes = enc_atom.getBytes("UTF-8");
+            final int length = bytes.length;
+            if (length < 256) {
+                write1(OtpExternal.smallAtomUtf8Tag);
+                write1(length);
             } else {
-                bytes = enc_atom.getBytes("UTF-8");
-                final int length = bytes.length;
-                if (length < 256) {
-                    write1(OtpExternal.smallAtomUtf8Tag);
-                    write1(length);
-                } else {
-                    write1(OtpExternal.atomUtf8Tag);
-                    write2BE(length);
-                }
+                write1(OtpExternal.atomUtf8Tag);
+                write2BE(length);
             }
             writeN(bytes);
         } catch (final java.io.UnsupportedEncodingException e) {