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WIA: Treat groups with size 0 as containing only zeroes

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This commit is contained in:
JosJuice 2020-01-03 23:27:39 +01:00
parent 36991e2dde
commit 3c373c8aa8
1 changed files with 12 additions and 4 deletions
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16
Source/Core/DiscIO/WIABlob.cpp
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@ -246,12 +246,20 @@ bool WIAFileReader::ReadFromGroups(u64* offset, u64* size, u8** out_ptr, u64 chu
const u64 group_offset = data_offset + i * chunk_size; const u64 group_offset = data_offset + i * chunk_size;
const u64 offset_in_group = *offset - group_offset; const u64 offset_in_group = *offset - group_offset;
const u64 group_offset_in_file = static_cast<u64>(Common::swap32(group.data_offset)) << 2;
const u64 bytes_to_read = std::min(chunk_size - offset_in_group, *size); const u64 bytes_to_read = std::min(chunk_size - offset_in_group, *size);
if (!ReadCompressedData(chunk_size, group_offset_in_file, Common::swap32(group.data_size), const u32 group_data_size = Common::swap32(group.data_size);
offset_in_group, bytes_to_read, *out_ptr, exception_list)) if (group_data_size == 0)
{ {
return false; std::memset(*out_ptr, 0, bytes_to_read);
}
else
{
const u64 group_offset_in_file = static_cast<u64>(Common::swap32(group.data_offset)) << 2;
if (!ReadCompressedData(chunk_size, group_offset_in_file, group_data_size, offset_in_group,
bytes_to_read, *out_ptr, exception_list))
{
return false;
}
} }
*offset += bytes_to_read; *offset += bytes_to_read;