mirror of
https://github.com/dingusdev/dingusppc.git
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104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <utils/imgfile.h>
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#include <loguru.hpp>
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#include <fstream>
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#include <sstream>
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#include <memory>
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extern bool is_deterministic;
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class ImgFile::Impl {
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public:
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std::unique_ptr<std::iostream> stream;
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};
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ImgFile::ImgFile(): impl(std::make_unique<Impl>())
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{
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}
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ImgFile::~ImgFile() = default;
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bool ImgFile::open(const std::string &img_path)
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{
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if (is_deterministic) {
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// Avoid writes to the underlying file by reading it all in memory and
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// only operating on that.
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auto mem_stream = std::make_unique<std::stringstream>();
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std::ifstream temp(img_path, std::ios::in | std::ios::binary);
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if (!temp) return false;
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*mem_stream << temp.rdbuf();
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impl->stream = std::move(mem_stream);
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} else {
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auto file_stream = std::make_unique<std::fstream>(img_path, std::ios::in | std::ios::out | std::ios::binary);
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if (!file_stream->is_open()) return false;
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impl->stream = std::move(file_stream);
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}
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return impl->stream && impl->stream->good();
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}
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void ImgFile::close()
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{
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if (!impl->stream) {
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LOG_F(WARNING, "ImgFile::close before disk was opened, ignoring.");
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return;
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}
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impl->stream.reset();
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}
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uint64_t ImgFile::size() const
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{
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if (!impl->stream) {
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LOG_F(WARNING, "ImgFile::size before disk was opened, ignoring.");
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return 0;
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}
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impl->stream->seekg(0, impl->stream->end);
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return impl->stream->tellg();
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}
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uint64_t ImgFile::read(void* buf, uint64_t offset, uint64_t length) const
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{
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if (!impl->stream) {
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LOG_F(WARNING, "ImgFile::read before disk was opened, ignoring.");
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return 0;
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}
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impl->stream->seekg(offset, std::ios::beg);
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impl->stream->read((char *)buf, length);
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return impl->stream->gcount();
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}
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uint64_t ImgFile::write(const void* buf, uint64_t offset, uint64_t length)
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{
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if (!impl->stream) {
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LOG_F(WARNING, "ImgFile::write before disk was opened, ignoring.");
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return 0;
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}
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impl->stream->seekg(offset, std::ios::beg);
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impl->stream->write((const char *)buf, length);
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#if defined(WIN32) || defined(__APPLE__) || defined(__linux)
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impl->stream->flush();
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#endif
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return impl->stream->gcount();
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}
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