Check in the pristine copy of ICU 4.6...

icu46/source/test/intltest/testutil.cpp

+/*
+**********************************************************************
+*   Copyright (C) 2001-2009, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*   Date        Name        Description
+*   05/23/00    aliu        Creation.
+**********************************************************************
+*/
+
+#include "unicode/unistr.h"
+#include "testutil.h"
+
+static const UChar HEX[16]={48,49,50,51,52,53,54,55,56,57,65,66,67,68,69,70};
+
+UnicodeString &TestUtility::appendHex(UnicodeString &buf, UChar32 ch) {
+    if (ch >= 0x10000) {
+        if (ch >= 0x100000) {
+            buf.append(HEX[0xF&(ch>>20)]);
+        }
+        buf.append(HEX[0xF&(ch>>16)]);
+    }
+    buf.append(HEX[0xF&(ch>>12)]);
+    buf.append(HEX[0xF&(ch>>8)]);
+    buf.append(HEX[0xF&(ch>>4)]);
+    buf.append(HEX[0xF&ch]);
+    return buf;
+}
+
+UnicodeString TestUtility::hex(UChar32 ch) {
+    UnicodeString buf;
+    appendHex(buf, ch);
+    return buf;
+}
+
+UnicodeString TestUtility::hex(const UnicodeString& s) {
+    return hex(s, 44 /*,*/);
+}
+
+UnicodeString TestUtility::hex(const UnicodeString& s, UChar sep) {
+    UnicodeString result;
+    if (s.isEmpty()) return result;
+    UChar32 c;
+    for (int32_t i = 0; i < s.length(); i += U16_LENGTH(c)) {
+        c = s.char32At(i);
+        if (i > 0) {
+            result.append(sep);
+        }
+        appendHex(result, c);
+    }
+    return result;
+}
+
+UnicodeString TestUtility::hex(const uint8_t* bytes, int32_t len) {
+        UnicodeString buf;
+        for (int32_t i = 0; i < len; ++i) {
+                buf.append(HEX[0x0F & (bytes[i] >> 4)]);
+                buf.append(HEX[0x0F & bytes[i]]);
+        }
+        return buf;
+}