1 /*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "wtf/testing/WTFTestHelpers.h"
33
34 #include "wtf/text/WTFString.h"
35 #include <ios> // NOLINT
36 #include <ostream> // NOLINT
37
38 namespace WTF {
39
operator <<(std::ostream & out,const String & string)40 std::ostream& operator<<(std::ostream& out, const String& string)
41 {
42 if (string.isNull())
43 return out << "<null>";
44
45 out << '"';
46 for (unsigned index = 0; index < string.length(); ++index) {
47 // Print shorthands for select cases.
48 UChar character = string[index];
49 switch (character) {
50 case '\t':
51 out << "\\t";
52 break;
53 case '\n':
54 out << "\\n";
55 break;
56 case '\r':
57 out << "\\r";
58 break;
59 case '"':
60 out << "\\\"";
61 break;
62 case '\\':
63 out << "\\\\";
64 break;
65 default:
66 if (character >= 0x20 && character < 0x7F) {
67 out << static_cast<char>(character);
68 } else {
69 // Print "\uXXXX" for control or non-ASCII characters.
70 out << "\\u";
71 out.width(4);
72 out.fill('0');
73 out.setf(std::ios_base::hex, std::ios_base::basefield);
74 out.setf(std::ios::uppercase);
75 out << character;
76 }
77 break;
78 }
79 }
80 return out << '"';
81 }
82
83 } // namespace WTF
84