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Parse padding instructions for StructuredDataDef

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This commit is contained in:
Jan 2022-02-06 10:49:58 +01:00
parent 73564cf0f0
commit dff7912dbc
1 changed files with 37 additions and 1 deletions
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36
src/ObjLoading/Parsing/StructuredDataDef/Sequence/StructuredDataStructScopeSequences.cpp
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@ -218,6 +218,41 @@ namespace sdd::struct_scope_sequences
}
};
class SequencePadding final : public StructuredDataDefParser::sequence_t
{
static constexpr auto CAPTURE_PADDING_VALUE = 1;
public:
SequencePadding()
{
const SimpleMatcherFactory create(this);
AddMatchers({
create.Keyword("pad"),
create.Char('('),
create.Integer().Capture(CAPTURE_PADDING_VALUE),
create.Char(')'),
create.Char(';')
});
}
protected:
void ProcessMatch(StructuredDataDefParserState* state, SequenceResult<SimpleParserValue>& result) const override
{
const auto& paddingValueToken = result.NextCapture(CAPTURE_PADDING_VALUE);
const auto paddingValue = paddingValueToken.IntegerValue();
if (paddingValue <= 0)
throw ParsingException(paddingValueToken.GetPos(), "Padding value must be greater than 0");
// Align to next byte
state->m_current_struct_offset_in_bits = (state->m_current_struct_offset_in_bits + 7) / 8 * 8;
// Add padding value to current size
state->m_current_struct_offset_in_bits += static_cast<size_t>(paddingValue);
}
};
class SequenceCloseStruct final : public StructuredDataDefParser::sequence_t
{
public:
@ -267,5 +302,6 @@ StructuredDataStructScopeSequences::StructuredDataStructScopeSequences(std::vect
void StructuredDataStructScopeSequences::AddSequences() const
{
AddSequence(std::make_unique<SequenceCloseStruct>());
AddSequence(std::make_unique<SequencePadding>());
AddSequence(std::make_unique<SequenceStructEntry>());
}