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78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/String.h>
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#include <AK/StringBuilder.h>
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#include <LibTextCodec/Decoder.h>
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namespace TextCodec {
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Latin1Decoder& latin1_decoder()
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{
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static Latin1Decoder* decoder;
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if (!decoder)
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decoder = new Latin1Decoder;
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return *decoder;
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}
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UTF8Decoder& utf8_decoder()
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{
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static UTF8Decoder* decoder;
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if (!decoder)
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decoder = new UTF8Decoder;
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return *decoder;
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}
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Decoder* decoder_for(const String& encoding)
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{
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if (encoding.equals_ignoring_case("iso-8859-1"))
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return &latin1_decoder();
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if (encoding.equals_ignoring_case("utf-8"))
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return &utf8_decoder();
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return nullptr;
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}
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String UTF8Decoder::to_utf8(const StringView& input)
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{
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return input;
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}
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String Latin1Decoder::to_utf8(const StringView& input)
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{
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StringBuilder builder(input.length());
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for (size_t i = 0; i < input.length(); ++i) {
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u8 ch = input[i];
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if (ch & 0x80) {
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builder.append(0xc0 | (ch >> 6));
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builder.append(0x80 | (ch & 0x3f));
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} else {
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builder.append(ch);
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}
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}
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return builder.to_string();
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}
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}
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