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47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2013 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include "xenia/vfs/devices/disc_image_file.h"
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#include <algorithm>
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#include "xenia/base/logging.h"
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#include "xenia/vfs/devices/disc_image_entry.h"
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namespace xe {
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namespace vfs {
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DiscImageFile::DiscImageFile(uint32_t file_access, DiscImageEntry* entry)
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: File(file_access, entry), entry_(entry) {}
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DiscImageFile::~DiscImageFile() = default;
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void DiscImageFile::Destroy() { delete this; }
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X_STATUS DiscImageFile::ReadSync(void* buffer, size_t buffer_length,
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size_t byte_offset, size_t* out_bytes_read) {
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if (byte_offset >= entry_->size()) {
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return X_STATUS_END_OF_FILE;
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}
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if (entry_->data_offset() >= entry_->mmap()->size()) {
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xe::FatalError("This ISO image is corrupted and cannot be played.");
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return X_STATUS_END_OF_FILE;
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}
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size_t real_offset = entry_->data_offset() + byte_offset;
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size_t real_length =
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std::min(buffer_length, entry_->data_size() - byte_offset);
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std::memcpy(buffer, entry_->mmap()->data() + real_offset, real_length);
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*out_bytes_read = real_length;
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return X_STATUS_SUCCESS;
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}
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} // namespace vfs
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} // namespace xe
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