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DiscIO: Improve IVolume::Read32 error handling

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Callers can now check whether reads fail, either by checking the return
value or by setting the buffer to a known bad value and seeing if it stays
untouched. I've added error checks to FileSystemGCWii and Boot_BS2Emu,
but not to Boot since it doesn't check any of its other reads either.
This commit is contained in:
JosJuice
2015-10-03 13:24:13 +02:00
parent 2b60eb0e22
commit c7e747d775
6 changed files with 90 additions and 62 deletions
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11
Source/Core/DiscIO/Volume.h
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@ -71,11 +71,14 @@ public:
// decrypt parameter must be false if not reading a Wii disc
virtual bool Read(u64 _Offset, u64 _Length, u8* _pBuffer, bool decrypt) const = 0;
virtual u32 Read32(u64 _Offset, bool decrypt) const
template <typename T>
bool ReadSwapped(u64 offset, T* buffer, bool decrypt) const
{
u32 temp;
Read(_Offset, sizeof(u32), (u8*)&temp, decrypt);
return Common::swap32(temp);
T temp;
if (!Read(offset, sizeof(T), reinterpret_cast<u8*>(&temp), decrypt))
return false;
*buffer = Common::FromBigEndian(temp);
return true;
}
virtual bool GetTitleID(u64*) const { return false; }