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//Chris Xiong 2022
//License: MPL-2.0
#include <sqlite3.h>
#include "signature_db.hpp"
enum batch_status
{
single = 0,
putsub,
findsub
};
struct signature_db_priv
{
sqlite3 *db;
sqlite3_mutex *mtx;
sqlite3_stmt *bst;
batch_status batch_mode;
};
signature_db::signature_db()
{
p = new signature_db_priv();
sqlite3_open(":memory:", &p->db);
p->mtx = sqlite3_db_mutex(p->db);
sqlite3_exec(p->db, R"sql(
create table images(
id int primary key,
path text,
signature text
);
)sql", nullptr, nullptr, nullptr);
sqlite3_exec(p->db, R"sql(
create table subslices(
image int,
slice int,
slicesig text,
primary key (image, slice),
foreign key (image) references images (id)
);
)sql", nullptr, nullptr, nullptr);
sqlite3_exec(p->db, R"sql(
create index ssidx on subslices(slicesig);
)sql", nullptr, nullptr, nullptr);
sqlite3_exec(p->db, R"sql(
create table dupes(
id1 int,
id2 int,
dist real,
primary key (id1, id2),
foreign key (id1, id2) references images (id, id)
);
)sql", nullptr, nullptr, nullptr);
p->bst = nullptr;
p->batch_mode = batch_status::single;
}
signature_db::~signature_db()
{
if (p->bst)
sqlite3_finalize(p->bst);
sqlite3_close(p->db);
delete p;
}
void signature_db::put_signature(size_t id, const fs::path &path, const signature &sig)
{
sqlite3_stmt *st;
std::string sigs = sig.to_string();
sqlite3_prepare_v2(p->db, "insert into images (id, path, signature) values(?, ?, ?);", -1, &st, 0);
sqlite3_bind_int(st, 1, id);
#if PATH_VALSIZE == 2
sqlite3_bind_text16(st, 2, path.c_str(), -1, nullptr);
#else
sqlite3_bind_text(st, 2, path.c_str(), -1, nullptr);
#endif
sqlite3_bind_text(st, 3, sigs.c_str(), -1, nullptr);
sqlite3_step(st);
sqlite3_finalize(st);
}
std::pair<fs::path, signature> signature_db::get_signature(size_t id)
{
sqlite3_stmt *st;
sqlite3_prepare_v2(p->db, "select path, signature from images where id = ?;", -1, &st, 0);
sqlite3_bind_int(st, 1, id);
int rr = sqlite3_step(st);
if (rr == SQLITE_ROW)
{
#if PATH_VALSIZE == 2
fs::path path((wchar_t*)sqlite3_column_text16(st, 0));
#else
fs::path path((char*)sqlite3_column_text(st, 0));
#endif
std::string sigs((char*)sqlite3_column_text(st, 1));
sqlite3_finalize(st);
return std::make_pair(path, signature::from_string(std::move(sigs)));
}
else
{
sqlite3_finalize(st);
return std::make_pair(fs::path(), signature());
}
}
void signature_db::batch_put_subslice_begin()
{
p->batch_mode = batch_status::putsub;
sqlite3_prepare_v2(p->db, "insert into subslices (image, slice, slicesig) values(?, ?, ?);", -1, &p->bst, 0);
}
void signature_db::put_subslice(size_t id, size_t slice, const signature &slicesig)
{
sqlite3_stmt *st = nullptr;
if (p->batch_mode == batch_status::putsub)
st = p->bst;
else
sqlite3_prepare_v2(p->db, "insert into subslices (image, slice, slicesig) values(?, ?, ?);", -1, &st, 0);
sqlite3_bind_int(st, 1, id);
sqlite3_bind_int(st, 2, slice);
std::string slicesigs = slicesig.to_string();
sqlite3_bind_text(st, 3, slicesigs.c_str(), -1, nullptr);
sqlite3_step(st);
if (p->batch_mode == batch_status::putsub)
sqlite3_reset(st);
else
sqlite3_finalize(st);
}
void signature_db::batch_find_subslice_begin()
{
p->batch_mode = batch_status::findsub;
sqlite3_prepare_v2(p->db, "select image, slice from subslices where slicesig = ?;", -1, &p->bst, 0);
}
std::vector<subslice_t> signature_db::find_subslice(const signature &slicesig)
{
sqlite3_stmt *st = nullptr;
if (p->batch_mode == batch_status::findsub)
st = p->bst;
else
sqlite3_prepare_v2(p->db, "select image, slice from subslices where slicesig = ?;", -1, &st, 0);
std::string slicesigs = slicesig.to_string();
sqlite3_bind_text(st, 1, slicesigs.c_str(), -1, nullptr);
std::vector<subslice_t> ret;
while (1)
{
int r = sqlite3_step(st);
if (r != SQLITE_ROW) break;
size_t im = sqlite3_column_int(st, 0);
size_t sl = sqlite3_column_int(st, 1);
ret.push_back({im, sl});
}
if (p->batch_mode == batch_status::findsub)
sqlite3_reset(st);
else
sqlite3_finalize(st);
return ret;
}
void signature_db::batch_end()
{
p->batch_mode = batch_status::single;
sqlite3_finalize(p->bst);
p->bst = nullptr;
}
void signature_db::put_dupe_pair(size_t ida, size_t idb, double dist)
{
sqlite3_stmt *st = nullptr;
sqlite3_prepare_v2(p->db, "insert into dupes (id1, id2, dist) values(?, ?, ?);", -1, &st, 0);
sqlite3_bind_int(st, 1, ida);
sqlite3_bind_int(st, 2, idb);
sqlite3_bind_double(st, 3, dist);
sqlite3_step(st);
sqlite3_finalize(st);
}
std::vector<dupe_t> signature_db::dupe_pairs()
{
sqlite3_stmt *st = nullptr;
sqlite3_prepare_v2(p->db, "select id1, id2, dist from dupes;", -1, &st, 0);
std::vector<dupe_t> ret;
while (1)
{
int r = sqlite3_step(st);
if (r != SQLITE_ROW) break;
ret.push_back({
(size_t)sqlite3_column_int(st, 0),
(size_t)sqlite3_column_int(st, 1),
sqlite3_column_double(st, 2)
});
}
sqlite3_finalize(st);
return ret;
}
void signature_db::lock()
{sqlite3_mutex_enter(p->mtx);}
void signature_db::unlock()
{sqlite3_mutex_leave(p->mtx);}
bool signature_db::to_db_file(const fs::path &path)
{
sqlite3 *dest;
int r;
#if PATH_VALSIZE == 2
r = sqlite3_open16(path.c_str(), &dest);
#else
r = sqlite3_open(path.c_str(), &dest);
#endif
if (r != SQLITE_OK) return false;
sqlite3_backup *bk = sqlite3_backup_init(dest, "main", p->db, "main");
bool ret = (bk != nullptr);
while (ret)
{
r = sqlite3_backup_step(bk, -1);
if (r == SQLITE_DONE) break;
else if (r != SQLITE_OK)
ret = false;
}
ret &= (SQLITE_OK == sqlite3_backup_finish(bk));
ret &= (SQLITE_OK == sqlite3_close(dest));
return ret;
}
bool signature_db::from_db_file(const fs::path &path)
{
sqlite3 *src;
int r;
#if PATH_VALSIZE == 2
r = sqlite3_open16(path.c_str(), &src);
#else
r = sqlite3_open(path.c_str(), &src);
#endif
if (r != SQLITE_OK) return false;
sqlite3_backup *bk = sqlite3_backup_init(p->db, "main", src, "main");
bool ret = (bk != nullptr);
while (ret)
{
r = sqlite3_backup_step(bk, -1);
if (r == SQLITE_DONE) break;
else if (r != SQLITE_OK)
ret = false;
}
ret &= (SQLITE_OK == sqlite3_backup_finish(bk));
ret &= (SQLITE_OK == sqlite3_close(src));
return ret;
}
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