mirror of https://github.com/axmolengine/axmol.git
105 lines
3.0 KiB
C++
105 lines
3.0 KiB
C++
/****************************************************************************
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Copyright (c) 2023 HALX99.
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https://axmolengine.github.io/
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#pragma once
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#include "simdjson/simdjson.h"
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#include "platform/FileUtils.h"
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NS_AX_BEGIN
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/**
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* @addtogroup base
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* @{
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*/
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/**
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@brief A dedicated class for easy load padded string for simdjson parser.
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The only legal use case is:
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auto strJson = PaddedString::load(fontatlasFile);
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ondemand::parser parser;
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ondemand::document settings = parser.iterate(strJson);
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*/
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class PaddedString final
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{
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public:
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static PaddedString load(std::string_view filename)
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{
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PaddedString ret;
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FileUtils::getInstance()->getContents(filename, &ret);
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return ret;
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}
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PaddedString() = default;
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~PaddedString() { delete[] data_ptr; }
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PaddedString(PaddedString&& o) noexcept : viable_size(o.viable_size), data_ptr(o.data_ptr)
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{
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o.data_ptr = nullptr; // we take ownership
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}
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PaddedString& operator=(PaddedString&& o) noexcept
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{
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swap(o);
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return *this;
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}
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void swap(PaddedString& o) noexcept
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{
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std::swap(viable_size, o.viable_size);
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std::swap(data_ptr, o.data_ptr);
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}
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using value_type = char;
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size_t size() const { return viable_size; }
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void resize(size_t size)
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{
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assert(!data_ptr || size <= viable_size); // not allow enlarge
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if (!data_ptr)
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data_ptr = simdjson::internal::allocate_padded_buffer(size);
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viable_size = size;
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}
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char* data() { return data_ptr; }
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const char* data() const { return data_ptr; }
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operator simdjson::padded_string_view() const noexcept
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{
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return simdjson::padded_string_view(data(), size(), size() + simdjson::SIMDJSON_PADDING);
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}
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private:
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PaddedString(const PaddedString&) = delete;
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size_t viable_size{0};
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char* data_ptr{nullptr};
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};
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// end of base group
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/** @} */
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NS_AX_END
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