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Fixed issue 7020. CISO >4GB failure. Caused by integer overflow.

This commit is contained in:
Jordan Woyak 2014-02-13 15:47:42 -06:00
parent 06329e2453
commit cec8ac20fc
1 changed files with 6 additions and 9 deletions
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15
Source/Core/DiscIO/CISOBlob.cpp
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@ -24,7 +24,7 @@ CISOFileReader::CISOFileReader(std::FILE* file)
m_block_size = header.block_size;
MapType count = 0;
for (u32 idx = 0; idx < CISO_MAP_SIZE; idx++)
for (u32 idx = 0; idx < CISO_MAP_SIZE; ++idx)
m_ciso_map[idx] = (1 == header.map[idx]) ? count++ : UNUSED_BLOCK_ID;
}
@ -60,22 +60,19 @@ bool CISOFileReader::Read(u64 offset, u64 nbytes, u8* out_ptr)
if (block < CISO_MAP_SIZE && UNUSED_BLOCK_ID != m_ciso_map[block])
{
// calculate the base address
auto const file_off = CISO_HEADER_SIZE + m_ciso_map[block] * m_block_size + data_offset;
auto const file_off = CISO_HEADER_SIZE + m_ciso_map[block] * (u64)m_block_size + data_offset;
if (!(m_file.Seek(file_off, SEEK_SET) && m_file.ReadArray(out_ptr, bytes_to_read)))
return false;
out_ptr += bytes_to_read;
offset += bytes_to_read;
nbytes -= bytes_to_read;
}
else
{
std::fill_n(out_ptr, bytes_to_read, 0);
out_ptr += bytes_to_read;
offset += bytes_to_read;
nbytes -= bytes_to_read;
}
out_ptr += bytes_to_read;
offset += bytes_to_read;
nbytes -= bytes_to_read;
}
return true;