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#include "google/protobuf/map.h"
#include <cstddef>
#include <cstdint>
#include <string>
#include <type_traits>
#include <utility>
#include "absl/functional/overload.h"
#include "absl/log/absl_log.h"
#include "absl/strings/string_view.h"
#include "google/protobuf/message.h"
#include "google/protobuf/message_lite.h"
#include "rust/cpp_kernel/strings.h"
namespace google {
namespace protobuf {
namespace rust {
namespace {
using MapValueTag = internal::UntypedMapBase::TypeKind;
// LINT.IfChange(map_ffi)
struct MapValue {
MapValueTag tag;
union {
bool b;
uint32_t u32;
uint64_t u64;
float f32;
double f64;
std::string* s;
google::protobuf::MessageLite* message;
};
};
// LINT.ThenChange(//depot/google3/third_party/protobuf/rust/cpp.rs:map_ffi)
template <typename T>
struct FromViewType {
using type = T;
};
template <>
struct FromViewType<PtrAndLen> {
using type = std::string;
};
template <typename Key>
using KeyMap = internal::KeyMapBase<
internal::KeyForBase<typename FromViewType<Key>::type>>;
template <typename T>
T AsViewType(T t) {
return t;
}
absl::string_view AsViewType(PtrAndLen key) { return key.AsStringView(); }
void InitializeMessageValue(void* raw_ptr, MessageLite* msg) {
MessageLite* new_msg = internal::RustMapHelper::PlacementNew(msg, raw_ptr);
auto* full_msg = DynamicCastMessage<Message>(new_msg);
// If we are working with a full (non-lite) proto, we reflectively swap the
// value into place. Otherwise, we have to perform a copy.
if (full_msg != nullptr) {
full_msg->GetReflection()->Swap(full_msg, DynamicCastMessage<Message>(msg));
} else {
new_msg->CheckTypeAndMergeFrom(*msg);
}
delete msg;
}
template <typename Key>
bool Insert(internal::UntypedMapBase* m, Key key, MapValue value) {
internal::NodeBase* node = internal::RustMapHelper::AllocNode(m);
if constexpr (std::is_same<Key, PtrAndLen>::value) {
key.PlacementNewString(node->GetVoidKey());
} else {
*static_cast<Key*>(node->GetVoidKey()) = key;
}
m->VisitValue(node, absl::Overload{
[&](bool* v) { *v = value.b; },
[&](uint32_t* v) { *v = value.u32; },
[&](uint64_t* v) { *v = value.u64; },
[&](float* v) { *v = value.f32; },
[&](double* v) { *v = value.f64; },
[&](std::string* str) {
new (str) std::string(std::move(*value.s));
delete value.s;
},
[&](MessageLite* msg) {
InitializeMessageValue(msg, value.message);
},
});
return internal::RustMapHelper::InsertOrReplaceNode(
static_cast<KeyMap<Key>*>(m), node);
}
void PopulateMapValue(const internal::UntypedMapBase& map,
internal::NodeBase* node, MapValue& output) {
map.VisitValue(node, absl::Overload{
[&](const bool* v) {
output.tag = MapValueTag::kBool;
output.b = *v;
},
[&](const uint32_t* v) {
output.tag = MapValueTag::kU32;
output.u32 = *v;
},
[&](const uint64_t* v) {
output.tag = MapValueTag::kU64;
output.u64 = *v;
},
[&](const float* v) {
output.tag = MapValueTag::kFloat;
output.f32 = *v;
},
[&](const double* v) {
output.tag = MapValueTag::kDouble;
output.f64 = *v;
},
[&](std::string* str) {
output.tag = MapValueTag::kString;
output.s = str;
},
[&](MessageLite* msg) {
output.tag = MapValueTag::kMessage;
output.message = msg;
},
});
}
template <typename Key>
bool Get(internal::UntypedMapBase* m, Key key, MapValue* value) {
auto* map_base = static_cast<KeyMap<Key>*>(m);
auto result = internal::RustMapHelper::FindHelper(map_base, AsViewType(key));
if (result.node == nullptr) {
return false;
}
PopulateMapValue(*m, result.node, *value);
return true;
}
template <typename Key>
bool Remove(internal::UntypedMapBase* m, Key key) {
auto* map_base = static_cast<KeyMap<Key>*>(m);
return internal::RustMapHelper::EraseImpl(map_base, AsViewType(key));
}
template <typename Key>
void IterGet(const internal::UntypedMapIterator* iter, Key* key,
MapValue* value) {
internal::NodeBase* node = iter->node_;
if constexpr (std::is_same<Key, PtrAndLen>::value) {
const std::string* s = iter->m_->GetKey<std::string>(node);
*key = PtrAndLen{s->data(), s->size()};
} else {
*key = *iter->m_->GetKey<Key>(node);
}
PopulateMapValue(*iter->m_, node, *value);
}
} // namespace
} // namespace rust
} // namespace protobuf
} // namespace google
extern "C" {
void proto2_rust_thunk_UntypedMapIterator_increment(
google::protobuf::internal::UntypedMapIterator* iter) {
iter->PlusPlus();
}
google::protobuf::internal::UntypedMapBase* proto2_rust_map_new(
google::protobuf::rust::MapValue key_prototype,
google::protobuf::rust::MapValue value_prototype) {
return new google::protobuf::internal::UntypedMapBase(
/* arena = */ nullptr,
google::protobuf::internal::UntypedMapBase::GetTypeInfoDynamic(
key_prototype.tag, value_prototype.tag,
value_prototype.tag == google::protobuf::rust::MapValueTag::kMessage
? value_prototype.message
: nullptr));
}
size_t proto2_rust_map_size(google::protobuf::internal::UntypedMapBase* m) {
return m->size();
}
google::protobuf::internal::UntypedMapIterator proto2_rust_map_iter(
google::protobuf::internal::UntypedMapBase* m) {
return m->begin();
}
void proto2_rust_map_free(google::protobuf::internal::UntypedMapBase* m) {
m->ClearTable(false);
delete m;
}
void proto2_rust_map_clear(google::protobuf::internal::UntypedMapBase* m) {
m->ClearTable(true);
}
#define DEFINE_KEY_SPECIFIC_MAP_OPERATIONS(cpp_type, suffix) \
bool proto2_rust_map_insert_##suffix(google::protobuf::internal::UntypedMapBase* m, \
cpp_type key, \
google::protobuf::rust::MapValue value) { \
return google::protobuf::rust::Insert(m, key, value); \
} \
\
bool proto2_rust_map_get_##suffix(google::protobuf::internal::UntypedMapBase* m, \
cpp_type key, \
google::protobuf::rust::MapValue* value) { \
return google::protobuf::rust::Get(m, key, value); \
} \
\
bool proto2_rust_map_remove_##suffix(google::protobuf::internal::UntypedMapBase* m, \
cpp_type key) { \
return google::protobuf::rust::Remove(m, key); \
} \
\
void proto2_rust_map_iter_get_##suffix( \
const google::protobuf::internal::UntypedMapIterator* iter, cpp_type* key, \
google::protobuf::rust::MapValue* value) { \
return google::protobuf::rust::IterGet(iter, key, value); \
}
DEFINE_KEY_SPECIFIC_MAP_OPERATIONS(int32_t, i32)
DEFINE_KEY_SPECIFIC_MAP_OPERATIONS(uint32_t, u32)
DEFINE_KEY_SPECIFIC_MAP_OPERATIONS(int64_t, i64)
DEFINE_KEY_SPECIFIC_MAP_OPERATIONS(uint64_t, u64)
DEFINE_KEY_SPECIFIC_MAP_OPERATIONS(bool, bool)
DEFINE_KEY_SPECIFIC_MAP_OPERATIONS(google::protobuf::rust::PtrAndLen, ProtoString)
} // extern "C"
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