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#include "sqlite3.hpp"
#include <sqlite3.h>
#include <cassert>
#include <cstring>
#include <cstdio>
#include <chrono>
#include <experimental/optional>
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-variable"
// Check sqlite3 library version.
const static bool sqliteVersionCheck = []() {
if (sqlite3_libversion_number() / 1000000 != SQLITE_VERSION_NUMBER / 1000000) {
char message[96];
snprintf(message, 96,
"sqlite3 libversion mismatch: headers report %d, but library reports %d",
SQLITE_VERSION_NUMBER, sqlite3_libversion_number());
throw std::runtime_error(message);
}
return true;
}();
#pragma GCC diagnostic pop
namespace mapbox {
namespace sqlite {
template <typename T>
using optional = std::experimental::optional<T>;
Database::Database(const std::string &filename, int flags) {
const int err = sqlite3_open_v2(filename.c_str(), &db, flags, nullptr);
if (err != SQLITE_OK) {
const auto message = sqlite3_errmsg(db);
db = nullptr;
throw Exception { err, message };
}
}
Database::Database(Database &&other)
: db(std::move(other.db)) {}
Database &Database::operator=(Database &&other) {
std::swap(db, other.db);
return *this;
}
Database::~Database() {
if (db) {
const int err = sqlite3_close(db);
if (err != SQLITE_OK) {
throw Exception { err, sqlite3_errmsg(db) };
}
}
}
Database::operator bool() const {
return db != nullptr;
}
void Database::exec(const std::string &sql) {
assert(db);
char *msg = nullptr;
const int err = sqlite3_exec(db, sql.c_str(), nullptr, nullptr, &msg);
if (msg) {
const std::string message = msg;
sqlite3_free(msg);
throw Exception { err, message };
} else if (err != SQLITE_OK) {
throw Exception { err, sqlite3_errmsg(db) };
}
}
Statement Database::prepare(const char *query) {
assert(db);
return Statement(db, query);
}
Statement::Statement(sqlite3 *db, const char *sql) {
const int err = sqlite3_prepare_v2(db, sql, -1, &stmt, nullptr);
if (err != SQLITE_OK) {
stmt = nullptr;
throw Exception { err, sqlite3_errmsg(db) };
}
}
Statement::Statement(Statement &&other) {
*this = std::move(other);
}
Statement &Statement::operator=(Statement &&other) {
std::swap(stmt, other.stmt);
return *this;
}
Statement::~Statement() {
if (stmt) {
sqlite3_finalize(stmt);
}
}
Statement::operator bool() const {
return stmt != nullptr;
}
void Statement::check(int err) {
if (err != SQLITE_OK) {
throw Exception { err, sqlite3_errmsg(sqlite3_db_handle(stmt)) };
}
}
template <> void Statement::bind(int offset, std::nullptr_t) {
assert(stmt);
check(sqlite3_bind_null(stmt, offset));
}
template <> void Statement::bind(int offset, int value) {
assert(stmt);
check(sqlite3_bind_int(stmt, offset, value));
}
template <> void Statement::bind(int offset, int64_t value) {
assert(stmt);
check(sqlite3_bind_int64(stmt, offset, value));
}
template <> void Statement::bind(int offset, double value) {
assert(stmt);
check(sqlite3_bind_double(stmt, offset, value));
}
template <> void Statement::bind(int offset, bool value) {
assert(stmt);
check(sqlite3_bind_int(stmt, offset, value));
}
template <> void Statement::bind(int offset, const char *value) {
assert(stmt);
check(sqlite3_bind_text(stmt, offset, value, -1, SQLITE_STATIC));
}
void Statement::bind(int offset, const std::string& value, bool retain) {
assert(stmt);
check(sqlite3_bind_blob(stmt, offset, value.data(), int(value.size()),
retain ? SQLITE_TRANSIENT : SQLITE_STATIC));
}
template <> void Statement::bind(int offset, std::chrono::system_clock::time_point value) {
assert(stmt);
check(sqlite3_bind_int64(stmt, offset, std::chrono::system_clock::to_time_t(value)));
}
template <> void Statement::bind(int offset, optional<std::string> value) {
if (!value) {
bind(offset, nullptr);
} else {
bind(offset, *value);
}
}
template <> void Statement::bind(int offset, optional<std::chrono::system_clock::time_point> value) {
if (!value) {
bind(offset, nullptr);
} else {
bind(offset, *value);
}
}
bool Statement::run() {
assert(stmt);
const int err = sqlite3_step(stmt);
if (err == SQLITE_DONE) {
return false;
} else if (err == SQLITE_ROW) {
return true;
} else if (err != SQLITE_OK) {
throw Exception { err, sqlite3_errmsg(sqlite3_db_handle(stmt)) };
} else {
return false;
}
}
template <> int Statement::get(int offset) {
assert(stmt);
return sqlite3_column_int(stmt, offset);
}
template <> int64_t Statement::get(int offset) {
assert(stmt);
return sqlite3_column_int64(stmt, offset);
}
template <> double Statement::get(int offset) {
assert(stmt);
return sqlite3_column_double(stmt, offset);
}
template <> std::string Statement::get(int offset) {
assert(stmt);
return {
reinterpret_cast<const char *>(sqlite3_column_blob(stmt, offset)),
size_t(sqlite3_column_bytes(stmt, offset))
};
}
template <> std::chrono::system_clock::time_point Statement::get(int offset) {
assert(stmt);
return std::chrono::system_clock::from_time_t(sqlite3_column_int64(stmt, offset));
}
template <> optional<std::string> Statement::get(int offset) {
assert(stmt);
if (sqlite3_column_type(stmt, offset) == SQLITE_NULL) {
return optional<std::string>();
} else {
return get<std::string>(offset);
}
}
template <> optional<std::chrono::system_clock::time_point> Statement::get(int offset) {
assert(stmt);
if (sqlite3_column_type(stmt, offset) == SQLITE_NULL) {
return optional<std::chrono::system_clock::time_point>();
} else {
return get<std::chrono::system_clock::time_point>(offset);
}
}
void Statement::reset() {
assert(stmt);
sqlite3_reset(stmt);
}
} // namespace sqlite
} // namespace mapbox
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