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LibGfx/PortableFormat: Propagate errors from read_magic_number()

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This commit is contained in:
Lucas CHOLLET 2023-03-12 22:48:24 -04:00 • committed by Andreas Kling
parent f96b61fdd8
commit 2356b48f13
1 changed files with 10 additions and 17 deletions
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27
Userland/Libraries/LibGfx/ImageFormats/PortableImageLoaderCommon.h
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@ -72,40 +72,33 @@ static ErrorOr<void> read_comment(TContext& context)
}
template<typename TContext>
static bool read_magic_number(TContext& context)
static ErrorOr<void> read_magic_number(TContext& context)
{
if (context.state >= TContext::State::MagicNumber) {
return true;
}
if (context.state >= TContext::State::MagicNumber)
return {};
if (context.stream->size().release_value_but_fixme_should_propagate_errors() < 2) {
context.state = TContext::State::Error;
if (TRY(context.stream->size()) < 2) {
dbgln_if(PORTABLE_IMAGE_LOADER_DEBUG, "There is no enough data for {}", TContext::FormatDetails::image_type);
return false;
return Error::from_string_literal("There is no enough data to read magic number.");
}
Array<u8, 2> magic_number {};
if (context.stream->read_until_filled(Bytes { magic_number }).is_error()) {
context.state = TContext::State::Error;
dbgln_if(PORTABLE_IMAGE_LOADER_DEBUG, "We can't read magic number for {}", TContext::FormatDetails::image_type);
return false;
}
TRY(context.stream->read_until_filled(Bytes { magic_number }));
if (magic_number[0] == 'P' && magic_number[1] == TContext::FormatDetails::ascii_magic_number) {
context.type = TContext::Type::ASCII;
context.state = TContext::State::MagicNumber;
return true;
return {};
}
if (magic_number[0] == 'P' && magic_number[1] == TContext::FormatDetails::binary_magic_number) {
context.type = TContext::Type::RAWBITS;
context.state = TContext::State::MagicNumber;
return true;
return {};
}
context.state = TContext::State::Error;
dbgln_if(PORTABLE_IMAGE_LOADER_DEBUG, "Magic number is not valid for {}{}{}", magic_number[0], magic_number[1], TContext::FormatDetails::image_type);
return false;
return Error::from_string_literal("Unable to recognize magic bytes");
}
template<typename TContext>
@ -205,7 +198,7 @@ static bool decode(TContext& context)
context.state = TContext::State::Error;
});
if (!read_magic_number(context))
if (read_magic_number(context).is_error())
return false;
if (read_whitespace(context).is_error())