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Build a temporary SigChunk list in the iterator in the cases where that's needed

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This commit is contained in:
Robert O'Callahan 2025-10-30 11:07:02 +00:00
parent 8c9dd3209a
commit 973e8a3928
4 changed files with 55 additions and 25 deletions
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48
kernel/rtlil.h
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@ -1276,8 +1276,7 @@ public:
SigSpec &operator=(SigSpec &&rhs) = default;
struct Chunks {
const SigSpec &spec;
Chunks(const SigSpec &spec) : spec(spec) {}
struct const_iterator {
using iterator_category = std::forward_iterator_tag;
using value_type = const SigChunk &;
@ -1320,26 +1319,43 @@ public:
it.bit_index = spec.size();
return it;
}
std::vector<RTLIL::SigChunk>::const_reverse_iterator rbegin() const {
spec.pack();
return spec.chunks_.rbegin();
// Later we should deprecate these and remove their in-tree calls,
// so we can eventually remove chunk_vector.
std::vector<RTLIL::SigChunk>::const_reverse_iterator rbegin() {
ensure_chunk_vector();
return chunk_vector.rbegin();
}
std::vector<RTLIL::SigChunk>::const_reverse_iterator rend() const {
spec.pack();
return spec.chunks_.rend();
std::vector<RTLIL::SigChunk>::const_reverse_iterator rend() {
ensure_chunk_vector();
return chunk_vector.rend();
}
int size() {
ensure_chunk_vector();
return chunk_vector.size();
}
int size() const {
spec.pack();
return spec.chunks_.size();
int result = 0;
for (const SigChunk &_: *this)
++result;
return result;
}
const SigChunk &at(int index) const {
spec.pack();
return spec.chunks_.at(index);
const SigChunk &at(int index) {
ensure_chunk_vector();
return chunk_vector.at(index);
}
operator const std::vector<RTLIL::SigChunk>&() const {
spec.pack();
return spec.chunks_;
operator const std::vector<RTLIL::SigChunk>&() {
ensure_chunk_vector();
return chunk_vector;
}
private:
void ensure_chunk_vector() {
if (spec.size() > 0 && chunk_vector.empty()) {
for (const RTLIL::SigChunk &c : *this)
chunk_vector.push_back(c);
}
}
const SigSpec &spec;
std::vector<RTLIL::SigChunk> chunk_vector;
};
friend struct Chunks::const_iterator;