storage/src/mozStorageSQLFunctions.h
author Robert O'Callahan <robert@ocallahan.org>
Tue, 03 Jun 2014 00:08:21 +1200
changeset 205378 58a202b281976f42fa7dab286fedaa482c3dce56
parent 98529 f4157e8c410708d76703f19e4dfb61859bfe32d8
permissions -rw-r--r--
Bug 1015664. Part 1: Remove NS_HIDDEN_() usage. r=bsmedberg

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozStorageSQLFunctions_h
#define mozStorageSQLFunctions_h

#include "sqlite3.h"
#include "nscore.h"

namespace mozilla {
namespace storage {

/**
 * Registers the functions declared here with the specified database.
 *
 * @param aDB
 *        The database we'll be registering the functions with.
 * @return the SQLite status code indicating success or failure.
 */
int registerFunctions(sqlite3 *aDB);

////////////////////////////////////////////////////////////////////////////////
//// Predefined Functions

/**
 * Overridden function to perform the SQL functions UPPER and LOWER.  These
 * support unicode, which the default implementations do not do.
 *
 * @param aCtx
 *        The sqlite_context that this function is being called on.
 * @param aArgc
 *        The number of arguments the function is being called with.
 * @param aArgv
 *        An array of the arguments the functions is being called with.
 */
void caseFunction(sqlite3_context *aCtx,
                              int aArgc,
                              sqlite3_value **aArgv);

/**
 * Overridden function to perform the SQL function LIKE.  This supports unicode,
 * which the default implementation does not do.
 *
 * @param aCtx
 *        The sqlite_context that this function is being called on.
 * @param aArgc
 *        The number of arguments the function is being called with.
 * @param aArgv
 *        An array of the arguments the functions is being called with.
 */
void likeFunction(sqlite3_context *aCtx,
                              int aArgc,
                              sqlite3_value **aArgv);

/**
 * An implementation of the Levenshtein Edit Distance algorithm for use in
 * Sqlite queries.
 * 
 * @param aCtx
 *        The sqlite_context that this function is being called on.
 * @param aArgc
 *        The number of arguments the function is being called with.
 * @param aArgv
 *        An array of the arguments the functions is being called with.
 */
void levenshteinDistanceFunction(sqlite3_context *aCtx,
                                             int aArgc,
                                             sqlite3_value **aArgv);

} // namespace storage
} // namespace mozilla

#endif // mozStorageSQLFunctions_h