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#pragma once
#include <contrib/libs/hyperscan/src/hs.h>
#include <util/generic/ptr.h>
#include <util/generic/strbuf.h>
#include <util/generic/vector.h>
#include <util/generic/yexception.h>
#include <util/system/cpu_id.h>
namespace NHyperscan {
using TCPUFeatures = decltype(hs_platform_info_t::cpu_features);
constexpr TCPUFeatures CPU_FEATURES_AVX2 = HS_CPU_FEATURES_AVX2;
constexpr TCPUFeatures CPU_FEATURES_AVX512 = HS_CPU_FEATURES_AVX512 | HS_CPU_FEATURES_AVX2;
template<typename TNativeDeleter, TNativeDeleter NativeDeleter>
class TDeleter {
public:
template<typename T>
static void Destroy(T* ptr) {
NativeDeleter(ptr);
}
};
using TDatabase = THolder<hs_database_t, TDeleter<decltype(&hs_free_database), &hs_free_database>>;
using TScratch = THolder<hs_scratch_t, TDeleter<decltype(&hs_free_scratch), &hs_free_scratch>>;
class TCompileException : public yexception {
};
namespace NPrivate {
enum class ERuntime {
Core2 = 0,
Corei7 = 1,
AVX2 = 2,
AVX512 = 3
};
ERuntime DetectCurrentRuntime();
TCPUFeatures RuntimeCpuFeatures(ERuntime runtime);
hs_platform_info_t MakePlatformInfo(TCPUFeatures cpuFeatures);
struct TImpl {
hs_error_t (*AllocScratch)(const hs_database_t* db, hs_scratch_t** scratch);
hs_error_t (*Scan)(const hs_database_t* db, const char* data,
unsigned length, unsigned flags, hs_scratch_t* scratch,
match_event_handler onEvent, void* userCtx);
hs_error_t (*SerializeDatabase)(const hs_database_t* db, char** bytes, size_t* serialized_length);
hs_error_t (*DeserializeDatabase)(const char* bytes, size_t length, hs_database_t** info);
TImpl() : TImpl(DetectCurrentRuntime()) {}
explicit TImpl(ERuntime runtime);
};
TDatabase Compile(const TStringBuf& regex, unsigned int flags, hs_platform_info_t* platform);
TDatabase CompileMulti(
const TVector<const char*>& regexs,
const TVector<unsigned int>& flags,
const TVector<unsigned int>& ids,
hs_platform_info_t* platform,
const TVector<const hs_expr_ext_t*>* extendedParameters = nullptr);
// We need to parametrize Scan and Matches functions for testing purposes
template<typename TCallback>
void Scan(
const TDatabase& db,
const TScratch& scratch,
const TStringBuf& text,
TCallback& callback, // applied to index of matched regex
const TImpl& impl
) {
struct TCallbackWrapper {
static int EventHandler(
unsigned int id,
unsigned long long from,
unsigned long long to,
unsigned int flags,
void* ctx) {
Y_UNUSED(flags);
TCallback& callback2 = *reinterpret_cast<TCallback*>(ctx);
if constexpr (std::is_same_v<int, std::invoke_result_t<TCallback, unsigned int, unsigned long long, unsigned long long>>) {
return callback2(id, from, to);
} else {
callback2(id, from, to);
return 0;
}
}
};
unsigned int flags = 0; // unused at present
hs_error_t status = impl.Scan(
db.Get(),
text.begin(),
text.size(),
flags,
scratch.Get(),
&TCallbackWrapper::EventHandler,
&callback);
if (status != HS_SUCCESS && status != HS_SCAN_TERMINATED) {
ythrow yexception() << "Failed to scan against text: " << text;
}
}
bool Matches(
const TDatabase& db,
const TScratch& scratch,
const TStringBuf& text,
const TImpl& impl);
}
TDatabase Compile(const TStringBuf& regex, unsigned int flags);
TDatabase Compile(const TStringBuf& regex, unsigned int flags, TCPUFeatures cpuFeatures);
TDatabase CompileMulti(
const TVector<const char*>& regexs,
const TVector<unsigned int>& flags,
const TVector<unsigned int>& ids,
const TVector<const hs_expr_ext_t*>* extendedParameters = nullptr);
TDatabase CompileMulti(
const TVector<const char*>& regexs,
const TVector<unsigned int>& flags,
const TVector<unsigned int>& ids,
TCPUFeatures cpuFeatures,
const TVector<const hs_expr_ext_t*>* extendedParameters = nullptr);
TScratch MakeScratch(const TDatabase& db);
void GrowScratch(TScratch& scratch, const TDatabase& db);
TScratch CloneScratch(const TScratch& scratch);
template<typename TCallback>
void Scan(
const TDatabase& db,
const TScratch& scratch,
const TStringBuf& text,
TCallback& callback // applied to index of matched regex
) {
NPrivate::Scan<TCallback>(db, scratch, text, callback, *Singleton<NPrivate::TImpl>());
}
bool Matches(
const TDatabase& db,
const TScratch& scratch,
const TStringBuf& text);
TString Serialize(const TDatabase& db);
TDatabase Deserialize(const TStringBuf& serialization);
}
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