Move files in wtf/ to platform/wtf/ (Part 10).

third_party/WebKit/Source/wtf/text/TextCodecUserDefined.cpp

-/*
- * Copyright (C) 2007, 2008 Apple, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "wtf/text/TextCodecUserDefined.h"
-
-#include "wtf/PtrUtil.h"
-#include "wtf/text/CString.h"
-#include "wtf/text/StringBuffer.h"
-#include "wtf/text/StringBuilder.h"
-#include "wtf/text/WTFString.h"
-#include <memory>
-
-namespace WTF {
-
-void TextCodecUserDefined::registerEncodingNames(
-    EncodingNameRegistrar registrar) {
-  registrar("x-user-defined", "x-user-defined");
-}
-
-static std::unique_ptr<TextCodec> newStreamingTextDecoderUserDefined(
-    const TextEncoding&,
-    const void*) {
-  return WTF::wrapUnique(new TextCodecUserDefined);
-}
-
-void TextCodecUserDefined::registerCodecs(TextCodecRegistrar registrar) {
-  registrar("x-user-defined", newStreamingTextDecoderUserDefined, 0);
-}
-
-String TextCodecUserDefined::decode(const char* bytes,
-                                    size_t length,
-                                    FlushBehavior,
-                                    bool,
-                                    bool&) {
-  StringBuilder result;
-  result.reserveCapacity(length);
-
-  for (size_t i = 0; i < length; ++i) {
-    signed char c = bytes[i];
-    result.append(static_cast<UChar>(c & 0xF7FF));
-  }
-
-  return result.toString();
-}
-
-template <typename CharType>
-static CString encodeComplexUserDefined(const CharType* characters,
-                                        size_t length,
-                                        UnencodableHandling handling) {
-  size_t targetLength = length;
-  Vector<char> result(targetLength);
-  char* bytes = result.data();
-
-  size_t resultLength = 0;
-  for (size_t i = 0; i < length;) {
-    UChar32 c;
-    // TODO(jsbell): Will the input for x-user-defined ever be LChars?
-    U16_NEXT(characters, i, length, c);
-    // If the input was a surrogate pair (non-BMP character) then we
-    // overestimated the length.
-    if (c > 0xffff)
-      --targetLength;
-    signed char signedByte = static_cast<signed char>(c);
-    if ((signedByte & 0xF7FF) == c) {
-      bytes[resultLength++] = signedByte;
-    } else {
-      // No way to encode this character with x-user-defined.
-      UnencodableReplacementArray replacement;
-      int replacementLength =
-          TextCodec::getUnencodableReplacement(c, handling, replacement);
-      DCHECK_GT(replacementLength, 0);
-      // Only one char was initially reserved per input character, so grow if
-      // necessary. Note that in the case of surrogate pairs and
-      // QuestionMarksForUnencodables the result length may be shorter than
-      // the input length.
-      targetLength += replacementLength - 1;
-      if (targetLength > result.size()) {
-        result.grow(targetLength);
-        bytes = result.data();
-      }
-      memcpy(bytes + resultLength, replacement, replacementLength);
-      resultLength += replacementLength;
-    }
-  }
-
-  return CString(bytes, resultLength);
-}
-
-template <typename CharType>
-CString TextCodecUserDefined::encodeCommon(const CharType* characters,
-                                           size_t length,
-                                           UnencodableHandling handling) {
-  char* bytes;
-  CString result = CString::createUninitialized(length, bytes);
-
-  // Convert the string a fast way and simultaneously do an efficient check to
-  // see if it's all ASCII.
-  UChar ored = 0;
-  for (size_t i = 0; i < length; ++i) {
-    UChar c = characters[i];
-    bytes[i] = static_cast<char>(c);
-    ored |= c;
-  }
-
-  if (!(ored & 0xFF80))
-    return result;
-
-  // If it wasn't all ASCII, call the function that handles more-complex cases.
-  return encodeComplexUserDefined(characters, length, handling);
-}
-
-CString TextCodecUserDefined::encode(const UChar* characters,
-                                     size_t length,
-                                     UnencodableHandling handling) {
-  return encodeCommon(characters, length, handling);
-}
-
-CString TextCodecUserDefined::encode(const LChar* characters,
-                                     size_t length,
-                                     UnencodableHandling handling) {
-  return encodeCommon(characters, length, handling);
-}
-
-}  // namespace WTF