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LibArchive: Move loading the next tar header into a helper function

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This now also validates the first header that is loaded, so we can drop
the corresponding FIXME from `tar`.
This commit is contained in:
Tim Schumacher 2022-11-28 19:07:39 +01:00 • committed by Andreas Kling
parent cbeaba0c12
commit fd3a823a20
4 changed files with 9 additions and 16 deletions
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16
Userland/Libraries/LibArchive/TarStream.cpp
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@ -56,13 +56,7 @@ ErrorOr<NonnullOwnPtr<TarInputStream>> TarInputStream::construct(NonnullOwnPtr<C
{
auto tar_stream = TRY(adopt_nonnull_own_or_enomem(new (nothrow) TarInputStream(move(stream))));
// Try and read the header.
auto header_span = TRY(tar_stream->m_stream->read(Bytes(&tar_stream->m_header, sizeof(m_header))));
if (header_span.size() != sizeof(m_header))
return Error::from_string_literal("Failed to read the entire header");
// Discard the rest of the block.
TRY(tar_stream->m_stream->discard(block_size - sizeof(TarFileHeader)));
TRY(tar_stream->load_next_header());
return tar_stream;
}
@ -89,7 +83,13 @@ ErrorOr<void> TarInputStream::advance()
TRY(m_stream->discard(block_ceiling(file_size) - m_file_offset));
m_file_offset = 0;
// FIXME: This is not unlike the initial initialization. Maybe we should merge those two.
TRY(load_next_header());
return {};
}
ErrorOr<void> TarInputStream::load_next_header()
{
auto header_span = TRY(m_stream->read(Bytes(&m_header, sizeof(m_header))));
if (header_span.size() != sizeof(m_header))
return Error::from_string_literal("Failed to read the entire header");