--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/kotlin/name/blackcap/passman/See.kt	Sun Sep 11 16:11:37 2022 -0700
@@ -0,0 +1,56 @@
+package name.blackcap.passman
+
+import java.util.Formatter
+
+private val UNPRINTABLE = setOf<Character.UnicodeBlock>(
+    Character.UnicodeBlock.COMBINING_DIACRITICAL_MARKS,
+    Character.UnicodeBlock.COMBINING_DIACRITICAL_MARKS_EXTENDED,
+    Character.UnicodeBlock.COMBINING_HALF_MARKS,
+    Character.UnicodeBlock.COMBINING_DIACRITICAL_MARKS_SUPPLEMENT,
+    Character.UnicodeBlock.COMBINING_MARKS_FOR_SYMBOLS,
+    Character.UnicodeBlock.HIGH_PRIVATE_USE_SURROGATES,
+    Character.UnicodeBlock.HIGH_SURROGATES,
+    Character.UnicodeBlock.LOW_SURROGATES,
+    Character.UnicodeBlock.PRIVATE_USE_AREA,
+    Character.UnicodeBlock.SPECIALS,
+
+)
+
+private val DELIM = '"'
+
+private val EXEMPT = setOf<Char>(' ')
+private val PREFIXED = setOf<Char>(DELIM, '\\')
+
+fun see(input: String): String {
+    val accum = StringBuilder()
+    val formatter = Formatter(accum)
+    accum.append(DELIM)
+    for (ch in input) {
+        val block = Character.UnicodeBlock.of(ch)
+        if (ch in EXEMPT) {
+            accum.append(ch)
+        } else if (block == null || block in UNPRINTABLE || Character.isSpaceChar(ch) || Character.isWhitespace(ch)) {
+            formatter.format("\\u%04x", ch.code)
+        } else if (ch in PREFIXED) {
+            accum.append('\\')
+            accum.append(ch)
+        } else {
+            accum.append(ch)
+        }
+    }
+    accum.append(DELIM)
+    return accum.toString()
+}
+
+fun dump(input: String): String {
+    val accum = StringBuilder()
+    var needSpace = false
+    for (ch in input) {
+        if (needSpace) {
+            accum.append(' ')
+        }
+        accum.append(ch.code)
+        needSpace = true
+    }
+    return accum.toString()
+}