storage/mozStorageSQLFunctions.h
author Chris H-C <chutten@mozilla.com>
Mon, 04 Jul 2016 11:16:05 -0400
changeset 312997 df28918fe2361f0b54ca9ce4773a29c4c0675d06
parent 244697 dd79977a3286d947aff8e270245d05c05e676964
permissions -rw-r--r--
bug 1218576 - Support remote accumulation via JS histograms. r=gfritzsche The JS histograms, too, need to dispatch their accumulations from child to parent. JSHistograms_Add now only supports histograms that are in gHistogramsMap or that were created in the parent process. After bug 1288745, maybe we'll be able to change this to be less convoluted. MozReview-Commit-ID: 3qTH89YKbGP

/* -*- 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