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#include "database.h"
#include <sqlite3.h>
#include <cassert>
#include <fstream>
#include <stdexcept>
#include <cstdio>
#include <sstream>
#include "field.h"
#include "../lib/util.h"
namespace verbly {
namespace generator {
sqlite3_error::sqlite3_error(
const std::string& what,
const std::string& db_err) :
what_(what + " (" + db_err + ")"),
db_err_(db_err)
{
}
const char* sqlite3_error::what() const noexcept
{
return what_.c_str();
}
const char* sqlite3_error::db_err() const noexcept
{
return db_err_.c_str();
}
database::database(std::string path)
{
// If there is already a file at this path, overwrite it.
if (std::ifstream(path))
{
if (std::remove(path.c_str()))
{
throw std::logic_error("Could not overwrite file at path");
}
}
if (sqlite3_open_v2(path.c_str(), &ppdb_, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL) != SQLITE_OK)
{
// We still have to free the resources allocated. In the event that
// allocation failed, ppdb will be null and sqlite3_close_v2 will just
// ignore it.
std::string errmsg(sqlite3_errmsg(ppdb_));
sqlite3_close_v2(ppdb_);
throw sqlite3_error("Could not create output datafile", errmsg);
}
}
database::database(database&& other) : database()
{
swap(*this, other);
}
database& database::operator=(database&& other)
{
swap(*this, other);
return *this;
}
void swap(database& first, database& second)
{
std::swap(first.ppdb_, second.ppdb_);
}
database::~database()
{
sqlite3_close_v2(ppdb_);
}
void database::runQuery(std::string query)
{
// This can only happen when doing bad things with move semantics.
assert(ppdb_ != nullptr);
sqlite3_stmt* ppstmt;
if (sqlite3_prepare_v2(ppdb_, query.c_str(), query.length(), &ppstmt, NULL) != SQLITE_OK)
{
throw sqlite3_error("Error writing to database", sqlite3_errmsg(ppdb_));
}
int result = sqlite3_step(ppstmt);
sqlite3_finalize(ppstmt);
if (result != SQLITE_DONE)
{
throw sqlite3_error("Error writing to database", sqlite3_errmsg(ppdb_));
}
}
void database::insertIntoTable(std::string table, std::list<field> fields)
{
// This can only happen when doing bad things with move semantics.
assert(ppdb_ != nullptr);
// This shouldn't happen.
assert(!fields.empty());
std::list<std::string> fieldNames;
std::list<std::string> qs;
for (field& f : fields)
{
fieldNames.push_back(f.getName());
qs.push_back("?");
}
std::ostringstream query;
query << "INSERT INTO ";
query << table;
query << " (";
query << implode(std::begin(fieldNames), std::end(fieldNames), ", ");
query << ") VALUES (";
query << implode(std::begin(qs), std::end(qs), ", ");
query << ")";
std::string query_str = query.str();
sqlite3_stmt* ppstmt;
if (sqlite3_prepare_v2(ppdb_, query_str.c_str(), query_str.length(), &ppstmt, NULL) != SQLITE_OK)
{
throw sqlite3_error("Error writing to database", sqlite3_errmsg(ppdb_));
}
int i = 1;
for (field& f : fields)
{
switch (f.getType())
{
case field::type::integer:
{
sqlite3_bind_int(ppstmt, i, f.getInteger());
break;
}
case field::type::string:
{
sqlite3_bind_text(ppstmt, i, f.getString().c_str(), f.getString().length(), SQLITE_TRANSIENT);
break;
}
case field::type::invalid:
{
// Fields can only be invalid when doing bad things with move semantics.
assert(false);
break;
}
}
i++;
}
int result = sqlite3_step(ppstmt);
sqlite3_finalize(ppstmt);
if (result != SQLITE_DONE)
{
throw sqlite3_error("Error writing to database", sqlite3_errmsg(ppdb_));
}
}
};
};
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