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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/common/sqlite_compiled_statement.h"
#include "base/logging.h"
#include "chrome/common/stl_util-inl.h"
// SqliteStatementCache -------------------------------------------------------
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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