filesystemAsset.h

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//
// Copyright 2021 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
#ifndef PXR_USD_AR_FILESYSTEM_ASSET_H
#define PXR_USD_AR_FILESYSTEM_ASSET_H
 
 
#include "pxr/pxr.h"
#include "pxr/usd/ar/api.h"
#include "pxr/usd/ar/asset.h"
#include "pxr/usd/ar/timestamp.h"
 
#include <cstdio>
#include <memory>
#include <utility>
 
PXR_NAMESPACE_OPEN_SCOPE
 
class ArResolvedPath;
 
class ArFilesystemAsset
    : public ArAsset
{
public:
    AR_API
    static std::shared_ptr<ArFilesystemAsset> Open(
        const ArResolvedPath& resolvedPath);
 
    AR_API
    static ArTimestamp GetModificationTimestamp(
        const ArResolvedPath& resolvedPath);
 
    AR_API
    explicit ArFilesystemAsset(FILE* file);
 
    AR_API
    ~ArFilesystemAsset();
 
    AR_API
    virtual size_t GetSize() const override;
 
    AR_API
    virtual std::shared_ptr<const char> GetBuffer() const override;
    
    AR_API
    virtual size_t Read(
        void* buffer, size_t count, size_t offset) const override;
 
    AR_API        
    virtual std::pair<FILE*, size_t> GetFileUnsafe() const override;
 
private:
    FILE* _file;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif // PXR_USD_AR_FILESYSTEM_ASSET_H