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Xenia-Canary/src/xenia/kernel/fs/devices/disc_image_entry.cc

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3.8 KiB
C++

/**
******************************************************************************
* Xenia : Xbox 360 Emulator Research Project *
******************************************************************************
* Copyright 2013 Ben Vanik. All rights reserved. *
* Released under the BSD license - see LICENSE in the root for more details. *
******************************************************************************
*/
#include "xenia/kernel/fs/devices/disc_image_entry.h"
#include <algorithm>
#include "xenia/kernel/fs/devices/disc_image_file.h"
namespace xe {
namespace kernel {
namespace fs {
class DiscImageMemoryMapping : public MemoryMapping {
public:
DiscImageMemoryMapping(uint8_t* address, size_t length)
: MemoryMapping(address, length) {}
~DiscImageMemoryMapping() override = default;
};
DiscImageEntry::DiscImageEntry(Device* device, const char* path,
MappedMemory* mmap, GDFXEntry* gdfx_entry)
: Entry(device, path),
mmap_(mmap),
gdfx_entry_(gdfx_entry),
it_(gdfx_entry->children.end()) {}
DiscImageEntry::~DiscImageEntry() {}
X_STATUS DiscImageEntry::QueryInfo(X_FILE_NETWORK_OPEN_INFORMATION* out_info) {
assert_not_null(out_info);
out_info->creation_time = 0;
out_info->last_access_time = 0;
out_info->last_write_time = 0;
out_info->change_time = 0;
out_info->allocation_size = 2048;
out_info->file_length = gdfx_entry_->size;
out_info->attributes = gdfx_entry_->attributes;
return X_STATUS_SUCCESS;
}
X_STATUS DiscImageEntry::QueryDirectory(X_FILE_DIRECTORY_INFORMATION* out_info, size_t length,
const char* file_name, bool restart) {
assert_not_null(out_info);
GDFXEntry* entry(nullptr);
if (file_name != nullptr) {
// Only queries in the current directory are supported for now
assert_true(std::strchr(file_name, '\\') == nullptr);
find_engine_.SetRule(file_name);
// Always restart the search?
it_ = gdfx_entry_->children.begin();
entry = gdfx_entry_->GetChild(find_engine_, it_);
if (!entry) {
return X_STATUS_NO_SUCH_FILE;
}
} else {
if (restart) {
it_ = gdfx_entry_->children.begin();
}
entry = gdfx_entry_->GetChild(find_engine_, it_);
if (!entry) {
return X_STATUS_UNSUCCESSFUL;
}
auto end = (uint8_t*)out_info + length;
auto entry_name = entry->name;
if (((uint8_t*)&out_info->file_name[0]) + entry_name.size() > end) {
return X_STATUS_NO_MORE_FILES;
}
}
out_info->next_entry_offset = 0;
out_info->file_index = 0xCDCDCDCD;
out_info->creation_time = 0;
out_info->last_access_time = 0;
out_info->last_write_time = 0;
out_info->change_time = 0;
out_info->end_of_file = entry->size;
out_info->allocation_size = 2048;
out_info->attributes = entry->attributes;
out_info->file_name_length = static_cast<uint32_t>(entry->name.size());
memcpy(out_info->file_name, entry->name.c_str(), entry->name.size());
return X_STATUS_SUCCESS;
}
std::unique_ptr<MemoryMapping> DiscImageEntry::CreateMemoryMapping(
Mode map_mode, const size_t offset, const size_t length) {
if (map_mode != Mode::READ) {
// Only allow reads.
return nullptr;
}
size_t real_offset = gdfx_entry_->offset + offset;
size_t real_length =
length ? std::min(length, gdfx_entry_->size) : gdfx_entry_->size;
return std::make_unique<DiscImageMemoryMapping>(mmap_->data() + real_offset,
real_length);
}
X_STATUS DiscImageEntry::Open(KernelState* kernel_state, Mode mode, bool async,
XFile** out_file) {
*out_file = new DiscImageFile(kernel_state, mode, this);
return X_STATUS_SUCCESS;
}
} // namespace fs
} // namespace kernel
} // namespace xe