From 29bcb69e55fdd44848dc532d37f842504f4215aa Mon Sep 17 00:00:00 2001
From: Baron Roberts <baron@cthing.com>
Date: Sat, 23 Mar 2024 15:09:33 -0700
Subject: [PATCH] Use "unicode-" rather than "ctrl-" for invalid XML
 characters.

---
 CHANGELOG.md                                          | 3 ++-
 src/main/java/org/cthing/xmlwriter/XmlWriter.java     | 4 ++--
 src/test/java/org/cthing/xmlwriter/XmlWriterTest.java | 8 ++++----
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3291f93..7143467 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,7 +18,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Numeric character entities are now written in hexidecimal (e.g. `&#xA9;`) rather than decimal
-- Invalid XML characters are now written in hexidecimal  (e.g. `ctrl-0xFFFE`) rather than decimal
+- Invalid XML characters are now written using the prefix `unicode-`  (e.g. `unicode-0xFFFE`) rather
+  than `ctrl-` and using hexidecimal  (e.g. `unicode-0xFFFE`) rather than decimal for the character code
 - Changed JSR-305 dependency from `implementation` to `api`
 
 ## [2.0.1] - 2023-12-23
diff --git a/src/main/java/org/cthing/xmlwriter/XmlWriter.java b/src/main/java/org/cthing/xmlwriter/XmlWriter.java
index 1073e11..6a433c9 100755
--- a/src/main/java/org/cthing/xmlwriter/XmlWriter.java
+++ b/src/main/java/org/cthing/xmlwriter/XmlWriter.java
@@ -2657,7 +2657,7 @@ void writeEscaped(final char[] carr, final int start, final int length) throws S
     /**
      * Writes the specified character to the output escaping the '&amp;', '&lt;', and '&gt;' characters using the
      * standard XML escape sequences. Control characters and characters outside the ASCII range are escaped using a
-     * numeric character reference. Invalid XML control characters are written as {code ctrl-0xN} where {@code N}
+     * numeric character reference. Invalid XML control characters are written as {code unicode-0xN} where {@code N}
      * is the hexidecimal value of the invalid character.
      *
      * @param c Character to write
@@ -2681,7 +2681,7 @@ void writeEscaped(final int c) throws SAXException {
                     writeRaw(Integer.toHexString(c).toUpperCase());
                     writeRaw(';');
                 } else {
-                    writeRaw("ctrl-0x");
+                    writeRaw("unicode-0x");
                     writeRaw(Integer.toHexString(c).toUpperCase());
                 }
             }
diff --git a/src/test/java/org/cthing/xmlwriter/XmlWriterTest.java b/src/test/java/org/cthing/xmlwriter/XmlWriterTest.java
index 1082a6f..e2ac10f 100755
--- a/src/test/java/org/cthing/xmlwriter/XmlWriterTest.java
+++ b/src/test/java/org/cthing/xmlwriter/XmlWriterTest.java
@@ -114,7 +114,7 @@ void testNeedsEscaping(final String str, final boolean needsEscaping) {
     @DisplayName("Write an array with escaping")
     void testWriteEscapedArray() throws Exception {
         final String testStringIn = "<Hello &<>\" World\u00A9\u001A\uFFFE\uD83D\uDE03\t\n";
-        final String testStringOut = "&lt;Hello &amp;&lt;&gt;\" World&#xA9;ctrl-0x1Actrl-0xFFFE&#x1F603;\t\n";
+        final String testStringOut = "&lt;Hello &amp;&lt;&gt;\" World&#xA9;unicode-0x1Aunicode-0xFFFE&#x1F603;\t\n";
 
         this.xmlWriter.writeEscaped(testStringIn.toCharArray(), 0, testStringIn.length());
 
@@ -133,9 +133,9 @@ public static Stream<Arguments> writeEscapedProvider() {
                 arguments('\n', "\n"),
                 arguments('\t', "\t"),
                 arguments('\r', "\r"),
-                arguments(0x0, "ctrl-0x0"),
-                arguments(0x1F, "ctrl-0x1F"),
-                arguments(0xFFFF, "ctrl-0xFFFF"),
+                arguments(0x0, "unicode-0x0"),
+                arguments(0x1F, "unicode-0x1F"),
+                arguments(0xFFFF, "unicode-0xFFFF"),
                 arguments(0x7F, "&#x7F;"),
                 arguments(0xD7FF, "&#xD7FF;"),
                 arguments(0xE000, "&#xE000;"),