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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/sqlite_compiled_statement.h"
#include "base/logging.h"
#include "base/stl_util-inl.h"
#include "chrome/common/sqlite_utils.h"
#include "third_party/sqlite/sqlite3.h"
// SqliteStatementCache -------------------------------------------------------
SqliteStatementCache::SqliteStatementCache() : db_(NULL) {}
SqliteStatementCache::SqliteStatementCache(sqlite3* db) : db_(db) {}
SqliteStatementCache::~SqliteStatementCache() {
STLDeleteContainerPairSecondPointers(statements_.begin(), statements_.end());
statements_.clear();
db_ = NULL;
}
void SqliteStatementCache::set_db(sqlite3* db) {
DCHECK(!db_) << "Setting the database twice";
db_ = db;
}
SQLStatement* SqliteStatementCache::InternalGetStatement(const char* func_name,
int func_number,
const char* sql) {
FuncID id;
id.name = func_name;
id.number = func_number;
StatementMap::const_iterator found = statements_.find(id);
if (found != statements_.end())
return found->second;
if (!sql)
return NULL; // Don't create a new statement when we were not given SQL.
// Create a new statement.
SQLStatement* statement = new SQLStatement();
if (statement->prepare(db_, sql) != SQLITE_OK) {
const char* err_msg = sqlite3_errmsg(db_);
NOTREACHED() << "SQL preparation error for: " << err_msg;
return NULL;
}
statements_[id] = statement;
return statement;
}
bool SqliteStatementCache::FuncID::operator<(const FuncID& other) const {
// Compare numbers first since they are faster than strings and they are
// almost always unique.
if (number != other.number)
return number < other.number;
return name < other.name;
}
// SqliteCompiledStatement ----------------------------------------------------
SqliteCompiledStatement::SqliteCompiledStatement(const char* func_name,
int func_number,
SqliteStatementCache& cache,
const char* sql) {
statement_ = cache.GetStatement(func_name, func_number, sql);
}
SqliteCompiledStatement::~SqliteCompiledStatement() {
// Reset the statement so that subsequent callers don't get crap in it.
if (statement_)
statement_->reset();
}
SQLStatement& SqliteCompiledStatement::operator*() {
DCHECK(statement_) << "Should check is_valid() before using the statement.";
return *statement_;
}
SQLStatement* SqliteCompiledStatement::operator->() {
DCHECK(statement_) << "Should check is_valid() before using the statement.";
return statement_;
}
SQLStatement* SqliteCompiledStatement::statement() {
DCHECK(statement_) << "Should check is_valid() before using the statement.";
return statement_;
}
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