Move the json-related files into a separate json directory. This hopefully al...

base/string_escape.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "base/string_escape.h"
-
-#include <string>
-
-#include "base/string_util.h"
-
-namespace string_escape {
-
-// Try to escape |c| as a "SingleEscapeCharacter" (\n, etc).  If successful,
-// returns true and appends the escape sequence to |dst|.  This isn't required
-// by the spec, but it's more readable by humans than the \uXXXX alternatives.
-template<typename CHAR>
-static bool JsonSingleEscapeChar(const CHAR c, std::string* dst) {
-  // WARNING: if you add a new case here, you need to update the reader as well.
-  // Note: \v is in the reader, but not here since the JSON spec doesn't
-  // allow it.
-  switch (c) {
-    case '\b':
-      dst->append("\\b");
-      break;
-    case '\f':
-      dst->append("\\f");
-      break;
-    case '\n':
-      dst->append("\\n");
-      break;
-    case '\r':
-      dst->append("\\r");
-      break;
-    case '\t':
-      dst->append("\\t");
-      break;
-    case '\\':
-      dst->append("\\\\");
-      break;
-    case '"':
-      dst->append("\\\"");
-      break;
-    default:
-      return false;
-  }
-  return true;
-}
-
-template <class STR>
-void JsonDoubleQuoteT(const STR& str,
-                      bool put_in_quotes,
-                      std::string* dst) {
-  if (put_in_quotes)
-    dst->push_back('"');
-
-  for (typename STR::const_iterator it = str.begin(); it != str.end(); ++it) {
-    typename ToUnsigned<typename STR::value_type>::Unsigned c = *it;
-    if (!JsonSingleEscapeChar(c, dst)) {
-      if (c < 32 || c > 126) {
-        // Technically, we could also pass through c > 126 as UTF8, but this is
-        // also optional.  It would also be a pain to implement here.
-        unsigned int as_uint = static_cast<unsigned int>(c);
-        StringAppendF(dst, "\\u%04X", as_uint);
-      } else {
-        unsigned char ascii = static_cast<unsigned char>(*it);
-        dst->push_back(ascii);
-      }
-    }
-  }
-
-  if (put_in_quotes)
-    dst->push_back('"');
-}
-
-void JsonDoubleQuote(const std::string& str,
-                     bool put_in_quotes,
-                     std::string* dst) {
-  JsonDoubleQuoteT(str, put_in_quotes, dst);
-}
-
-void JsonDoubleQuote(const string16& str,
-                     bool put_in_quotes,
-                     std::string* dst) {
-  JsonDoubleQuoteT(str, put_in_quotes, dst);
-}
-
-}  // namespace string_escape