third_party/WebKit/Source/wtf/testing/WTFTestPrinters.cpp

   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
  33 #include "wtf/text/WTFString.h"
  34 #include <ostream> // NOLINT
  35
  36 namespace WTF {
  37
  38 std::ostream& operator<<(std::ostream& out, const String& string)
  39 {
  40     if (string.isNull())
  41         return out << "<null>";
  42
  43     out << '"';
  44     for (unsigned index = 0; index < string.length(); ++index) {
  45         // Print shorthands for select cases.
  46         UChar character = string[index];
  47         switch (character) {
  48         case '\t':
  49             out << "\\t";
  50             break;
  51         case '\n':
  52             out << "\\n";
  53             break;
  54         case '\r':
  55             out << "\\r";
  56             break;
  57         case '"':
  58             out << "\\\"";
  59             break;
  60         case '\\':
  61             out << "\\\\";
  62             break;
  63         default:
  64             if (character >= 0x20 && character < 0x7F) {
  65                 out << static_cast<char>(character);
  66             } else {
  67                 // Print "\uXXXX" for control or non-ASCII characters.
  68                 out << "\\u";
  69                 out.width(4);
  70                 out.fill('0');
  71                 out.setf(std::ios_base::hex, std::ios_base::basefield);
  72                 out.setf(std::ios::uppercase);
  73                 out << character;
  74             }
  75             break;
  76         }
  77     }
  78     return out << '"';
  79 }
  80
  81 } // namespace WTF