DiscIO: Add way of checking whether blob data size is accurate

Source/Core/DiscIO/Blob.h

@@ -44,6 +44,7 @@ public:
   virtual BlobType GetBlobType() const = 0;
   virtual u64 GetRawSize() const = 0;
   virtual u64 GetDataSize() const = 0;
+  virtual bool IsDataSizeAccurate() const = 0;
 
   // NOT thread-safe - can't call this from multiple threads.
   virtual bool Read(u64 offset, u64 size, u8* out_ptr) = 0;

Source/Core/DiscIO/CISOBlob.h

@@ -40,6 +40,7 @@ public:
   // The CISO format does not save the original file size.
   // This function returns an upper bound.
   u64 GetDataSize() const override;
+  bool IsDataSizeAccurate() const override { return false; }
 
   u64 GetRawSize() const override;
   bool Read(u64 offset, u64 nbytes, u8* out_ptr) override;

Source/Core/DiscIO/CompressedBlob.h

@@ -49,8 +49,9 @@ public:
   ~CompressedBlobReader();
   const CompressedBlobHeader& GetHeader() const { return m_header; }
   BlobType GetBlobType() const override { return BlobType::GCZ; }
-  u64 GetDataSize() const override { return m_header.data_size; }
   u64 GetRawSize() const override { return m_file_size; }
+  u64 GetDataSize() const override { return m_header.data_size; }
+  bool IsDataSizeAccurate() const override { return true; }
   u64 GetBlockCompressedSize(u64 block_num) const;
   bool GetBlock(u64 block_num, u8* out_ptr) override;
 

Source/Core/DiscIO/DirectoryBlob.h

@@ -146,6 +146,7 @@ public:
   BlobType GetBlobType() const override;
   u64 GetRawSize() const override;
   u64 GetDataSize() const override;
+  bool IsDataSizeAccurate() const override { return true; }
 
 private:
   struct PartitionWithType

Source/Core/DiscIO/DriveBlob.h

@@ -24,8 +24,9 @@ public:
   static std::unique_ptr<DriveReader> Create(const std::string& drive);
   ~DriveReader();
   BlobType GetBlobType() const override { return BlobType::DRIVE; }
-  u64 GetDataSize() const override { return m_size; }
   u64 GetRawSize() const override { return m_size; }
+  u64 GetDataSize() const override { return m_size; }
+  bool IsDataSizeAccurate() const override { return true; }
 
 private:
   DriveReader(const std::string& drive);

Source/Core/DiscIO/FileBlob.h

@@ -20,8 +20,9 @@ public:
   static std::unique_ptr<PlainFileReader> Create(File::IOFile file);
 
   BlobType GetBlobType() const override { return BlobType::PLAIN; }
-  u64 GetDataSize() const override { return m_size; }
   u64 GetRawSize() const override { return m_size; }
+  u64 GetDataSize() const override { return m_size; }
+  bool IsDataSizeAccurate() const override { return true; }
   bool Read(u64 offset, u64 nbytes, u8* out_ptr) override;
 
 private:

Source/Core/DiscIO/TGCBlob.h

@@ -43,8 +43,9 @@ public:
   static std::unique_ptr<TGCFileReader> Create(File::IOFile file);
 
   BlobType GetBlobType() const override { return BlobType::TGC; }
-  u64 GetDataSize() const override;
   u64 GetRawSize() const override { return m_size; }
+  u64 GetDataSize() const override;
+  bool IsDataSizeAccurate() const override { return true; }
   bool Read(u64 offset, u64 nbytes, u8* out_ptr) override;
 
 private:

Source/Core/DiscIO/Volume.h

@@ -101,6 +101,7 @@ public:
   virtual BlobType GetBlobType() const = 0;
   // Size of virtual disc (may be inaccurate depending on the blob type)
   virtual u64 GetSize() const = 0;
+  virtual bool IsSizeAccurate() const = 0;
   // Size on disc (compressed size)
   virtual u64 GetRawSize() const = 0;
 

Source/Core/DiscIO/VolumeFileBlobReader.h

@@ -23,8 +23,9 @@ public:
   Create(const Volume& volume, const Partition& partition, const std::string& file_path);
 
   BlobType GetBlobType() const override { return BlobType::PLAIN; }
-  u64 GetDataSize() const override;
   u64 GetRawSize() const override;
+  u64 GetDataSize() const override;
+  bool IsDataSizeAccurate() const override { return true; }
   bool Read(u64 offset, u64 length, u8* out_ptr) override;
 
 private:

Source/Core/DiscIO/VolumeGC.cpp

@@ -179,6 +179,11 @@ u64 VolumeGC::GetSize() const
   return m_reader->GetDataSize();
 }
 
+bool VolumeGC::IsSizeAccurate() const
+{
+  return m_reader->IsDataSizeAccurate();
+}
+
 u64 VolumeGC::GetRawSize() const
 {
   return m_reader->GetRawSize();

Source/Core/DiscIO/VolumeGC.h

@@ -52,6 +52,7 @@ public:
   Country GetCountry(const Partition& partition = PARTITION_NONE) const override;
   BlobType GetBlobType() const override;
   u64 GetSize() const override;
+  bool IsSizeAccurate() const override;
   u64 GetRawSize() const override;
 
 private:

Source/Core/DiscIO/VolumeWad.cpp

@@ -175,6 +175,11 @@ u64 VolumeWAD::GetSize() const
   return m_reader->GetDataSize();
 }
 
+bool VolumeWAD::IsSizeAccurate() const
+{
+  return m_reader->IsDataSizeAccurate();
+}
+
 u64 VolumeWAD::GetRawSize() const
 {
   return m_reader->GetRawSize();

Source/Core/DiscIO/VolumeWad.h

@@ -54,6 +54,7 @@ public:
 
   BlobType GetBlobType() const override;
   u64 GetSize() const override;
+  bool IsSizeAccurate() const override;
   u64 GetRawSize() const override;
 
 private:

Source/Core/DiscIO/VolumeWii.cpp

@@ -379,6 +379,11 @@ u64 VolumeWii::GetSize() const
   return m_reader->GetDataSize();
 }
 
+bool VolumeWii::IsSizeAccurate() const
+{
+  return m_reader->IsDataSizeAccurate();
+}
+
 u64 VolumeWii::GetRawSize() const
 {
   return m_reader->GetRawSize();

Source/Core/DiscIO/VolumeWii.h

@@ -62,6 +62,7 @@ public:
   Country GetCountry(const Partition& partition) const override;
   BlobType GetBlobType() const override;
   u64 GetSize() const override;
+  bool IsSizeAccurate() const override;
   u64 GetRawSize() const override;
 
   static constexpr unsigned int BLOCK_HEADER_SIZE = 0x0400;

Source/Core/DiscIO/WbfsBlob.h

@@ -24,12 +24,13 @@ public:
   static std::unique_ptr<WbfsFileReader> Create(File::IOFile file, const std::string& path);
 
   BlobType GetBlobType() const override { return BlobType::WBFS; }
+  u64 GetRawSize() const override { return m_size; }
   // The WBFS format does not save the original file size.
   // This function returns a constant upper bound
   // (the size of a double-layer Wii disc).
   u64 GetDataSize() const override;
+  bool IsDataSizeAccurate() const override { return false; }
 
-  u64 GetRawSize() const override { return m_size; }
   bool Read(u64 offset, u64 nbytes, u8* out_ptr) override;
 
 private: