TextCodecUserDefined.cpp revision 5f1ab04193ad0130ca8204aadaceae083aca9881
18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/* 28e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2007, 2008 Apple, Inc. All rights reserved. 38e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 48e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Redistribution and use in source and binary forms, with or without 58e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * modification, are permitted provided that the following conditions 68e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * are met: 78e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 88e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer. 98e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * documentation and/or other materials provided with the distribution. 128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project */ 258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "config.h" 278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "TextCodecUserDefined.h" 288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "CString.h" 308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "PlatformString.h" 318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "StringBuffer.h" 328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <stdio.h> 335f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian#include <wtf/PassOwnPtr.h> 348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectnamespace WebCore { 368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid TextCodecUserDefined::registerEncodingNames(EncodingNameRegistrar registrar) 388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project registrar("x-user-defined", "x-user-defined"); 408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 418e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 425f1ab04193ad0130ca8204aadaceae083aca9881Feng Qianstatic PassOwnPtr<TextCodec> newStreamingTextDecoderUserDefined(const TextEncoding&, const void*) 438e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 445f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian return new TextCodecUserDefined; 458e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 468e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid TextCodecUserDefined::registerCodecs(TextCodecRegistrar registrar) 488e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project registrar("x-user-defined", newStreamingTextDecoderUserDefined, 0); 508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 528e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source ProjectString TextCodecUserDefined::decode(const char* bytes, size_t length, bool, bool, bool&) 538e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 545f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian UChar* buffer; 555f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian String result = String::createUninitialized(length, buffer); 568e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 578e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project for (size_t i = 0; i < length; ++i) { 588e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project signed char c = bytes[i]; 598e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project buffer[i] = c & 0xF7FF; 608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 618e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 625f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian return result; 638e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 648e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 658e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectstatic CString encodeComplexUserDefined(const UChar* characters, size_t length, UnencodableHandling handling) 668e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 678e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<char> result(length); 688e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project char* bytes = result.data(); 698e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 708e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project size_t resultLength = 0; 718e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project for (size_t i = 0; i < length; ) { 728e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project UChar32 c; 738e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project U16_NEXT(characters, i, length, c); 748e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project signed char signedByte = c; 758e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if ((signedByte & 0xF7FF) == c) 768e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project bytes[resultLength++] = signedByte; 778e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project else { 788e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // No way to encode this character with x-user-defined. 798e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project UnencodableReplacementArray replacement; 808e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int replacementLength = TextCodec::getUnencodableReplacement(c, handling, replacement); 818e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project result.grow(resultLength + replacementLength + length - i); 828e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project bytes = result.data(); 838e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project memcpy(bytes + resultLength, replacement, replacementLength); 848e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project resultLength += replacementLength; 858e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 868e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 878e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 888e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return CString(bytes, resultLength); 898e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 908e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 918e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source ProjectCString TextCodecUserDefined::encode(const UChar* characters, size_t length, UnencodableHandling handling) 928e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 938e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project char* bytes; 948e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project CString string = CString::newUninitialized(length, bytes); 958e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 968e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Convert the string a fast way and simultaneously do an efficient check to see if it's all ASCII. 978e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project UChar ored = 0; 988e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project for (size_t i = 0; i < length; ++i) { 998e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project UChar c = characters[i]; 1008e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project bytes[i] = c; 1018e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project ored |= c; 1028e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1038e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1048e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (!(ored & 0xFF80)) 1058e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return string; 1068e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1078e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // If it wasn't all ASCII, call the function that handles more-complex cases. 1088e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return encodeComplexUserDefined(characters, length, handling); 1098e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} // namespace WebCore 112