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/*
* (C) 2014 Robin Krahl
* MIT license -- http://opensource.org/licenses/MIT
*/
#include "sqlitepp.h"
#include <exception>
#include <iostream>
#include <sstream>
sqlitepp::Openable::Openable(const bool open, const std::string & name) :
m_open(open), m_name(name) {
}
const bool sqlitepp::Openable::isOpen() const {
return m_open;
}
void sqlitepp::Openable::requireOpen() const {
if (!m_open) {
throw std::logic_error(m_name + " is not open.");
}
}
void sqlitepp::Openable::setOpen(const bool open) {
m_open = open;
}
const std::string sqlitepp::DatabaseError::getErrorMessage(const int errorCode, const std::string & errorMessage) {
std::ostringstream stringStream;
stringStream << "Caught SQLite3 error " << errorCode << " meaning: " << errorMessage;
return stringStream.str();
}
sqlitepp::DatabaseError::DatabaseError(const int errorCode) :
std::runtime_error(getErrorMessage(errorCode, sqlite3_errstr(errorCode))), m_errorCode(errorCode) {
}
sqlitepp::DatabaseError::DatabaseError(const int errorCode, const std::string & errorMessage) :
std::runtime_error(getErrorMessage(errorCode, errorMessage)), m_errorCode(errorCode)
{
}
const int sqlitepp::DatabaseError::errorCode() const {
return m_errorCode;
}
sqlitepp::Statement::Statement(sqlitepp::Database & database, const std::string & statement) :
Openable(true, "Statement"), m_canRead(false) {
database.requireOpen();
int result = sqlite3_prepare_v2(database.m_handle, statement.c_str(), -1, &m_handle, NULL);
if (result != SQLITE_OK) {
throw DatabaseError(result, sqlite3_errmsg(database.m_handle));
}
if (m_handle == NULL) {
throw std::runtime_error("Statement handle is NULL");
}
}
sqlitepp::Statement::~Statement() {
if (isOpen()) {
// errors that could occur during finalizing are ignored as they have
// already been handled!
sqlite3_finalize(m_handle);
setOpen(false);
}
}
void sqlitepp::Statement::bindDouble(const int index, const double value) {
requireOpen();
handleBindResult(index, sqlite3_bind_double(m_handle, index, value));
}
void sqlitepp::Statement::bindDouble(const std::string & name, const double value) {
bindDouble(getParameterIndex(name), value);
}
void sqlitepp::Statement::bindInt(const int index, const int value) {
requireOpen();
handleBindResult(index, sqlite3_bind_int(m_handle, index, value));
}
void sqlitepp::Statement::bindInt(const std::string & name, const int value) {
bindInt(getParameterIndex(name), value);
}
void sqlitepp::Statement::bindString(const int index, const std::string & value) {
requireOpen();
handleBindResult(index, sqlite3_bind_text(m_handle, index, value.c_str(), -1, NULL));
}
void sqlitepp::Statement::bindString(const std::string & name, const std::string & value) {
bindString(getParameterIndex(name), value);
}
const bool sqlitepp::Statement::canRead() const {
return m_canRead;
}
const int sqlitepp::Statement::columnCount() const {
requireOpen();
requireCanRead();
return sqlite3_column_count(m_handle);
}
const double sqlitepp::Statement::readDouble(const int column) const {
requireOpen();
requireCanRead();
return sqlite3_column_double(m_handle, column);
}
const int sqlitepp::Statement::readInt(const int column) const {
requireOpen();
requireCanRead();
return sqlite3_column_int(m_handle, column);
}
const std::string sqlitepp::Statement::readString(const int column) const {
requireOpen();
requireCanRead();
return std::string((const char *) sqlite3_column_text(m_handle, column));
}
void sqlitepp::Statement::requireCanRead() const {
if (!m_canRead) {
throw std::logic_error("Trying to read from statement without data");
}
}
const bool sqlitepp::Statement::step() {
requireOpen();
int result = sqlite3_step(m_handle);
if (result == SQLITE_ROW) {
m_canRead = true;
} else if (result == SQLITE_DONE) {
m_canRead = false;
} else {
throw DatabaseError(result);
}
return m_canRead;
}
void sqlitepp::Statement::finalize() {
if (isOpen()) {
// errors that could occur during finalizing are ignored as they have
// already been handled!
sqlite3_finalize(m_handle);
setOpen(false);
}
}
const bool sqlitepp::Statement::reset() {
requireOpen();
return sqlite3_reset(m_handle) == SQLITE_OK;
}
int sqlitepp::Statement::getParameterIndex(const std::string & name) const {
requireOpen();
int index = sqlite3_bind_parameter_index(m_handle, name.c_str());
if (index == 0) {
throw std::invalid_argument("No such parameter: " + name);
}
return index;
}
void sqlitepp::Statement::handleBindResult(const int index, const int result) const {
switch (result) {
case SQLITE_OK:
break;
case SQLITE_RANGE:
throw std::out_of_range("Bind index out of range: " + index);
case SQLITE_NOMEM:
throw std::runtime_error("No memory to bind parameter");
default:
throw DatabaseError(result);
}
}
sqlitepp::Database::Database() : Openable(false, "Database") {
}
sqlitepp::Database::Database(const std::string & file) : Openable(false, "Database") {
open(file);
}
sqlitepp::Database::~Database() {
if (isOpen()) {
int result = sqlite3_close(m_handle);
if (result != SQLITE_OK) {
std::cerr << "sqlitepp::Database::~Database(): Close failed with code "
<< result << " meaning: " << sqlite3_errstr(result);
std::abort();
} else {
setOpen(false);
}
}
// m_handle is deleted by sqlite3_close
}
void sqlitepp::Database::close() {
if (isOpen()) {
int result = sqlite3_close(m_handle);
if (result == SQLITE_OK) {
setOpen(false);
} else {
throw sqlitepp::DatabaseError(result);
}
}
}
void sqlitepp::Database::execute(const std::string & sql) {
requireOpen();
Statement statement(*this, sql);
statement.step();
statement.finalize();
}
void sqlitepp::Database::open(const std::string & file) {
if (isOpen()) {
throw std::logic_error("sqlitepp::Database::open(std::string&): Database already open");
}
int result = sqlite3_open(file.c_str(), & m_handle);
if (m_handle == NULL) {
throw std::runtime_error("sqlitepp::Database::open(std::string&): Can't allocate memory");
}
if (result == SQLITE_OK) {
setOpen(true);
} else {
std::string errorMessage = sqlite3_errmsg(m_handle);
sqlite3_close(m_handle);
throw sqlitepp::DatabaseError(result, errorMessage);
}
}
std::shared_ptr<sqlitepp::Statement> sqlitepp::Database::prepare(const std::string & sql) {
return std::shared_ptr<sqlitepp::Statement>(new sqlitepp::Statement(*this, sql));
}
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