storage/SQLCollations.h
author Masayuki Nakano <masayuki@d-toybox.com>
Thu, 10 Jan 2019 08:50:41 +0000
changeset 453219 99a977d519a0b78e267d3dce4afb009b8d3be769
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
child 472056 e1993a1f09ac53cd1a04fdf6a87f8cad8e44f73e
permissions -rw-r--r--
Bug 181137 - part 8: Make ContentIteratorBase and its subclasses non-refcountable r=smaug This patch makes ContentIteratorBase, PostContentIterator, PreContentIterator and ContentSubtreeIterator classes non-refcountable because most users can create their instances in stack and such users may be in a hot path. So, we can save a lot of cost of instantiation. Unfortunately, only ScriptableContentIterator creates one of the concrete classes and needs to destroy it properly. Therefore, its EnsureContentIterator(), destructor, traverse and unlink code becomes messy. However, ScriptableContentIterator was designed for automated tests and we need to maintain it not so many times. Therefore, improvement of other users must be worthwhiler than this demerit. Differential Revision: https://phabricator.services.mozilla.com/D15928

/* -*- 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 mozilla_storage_SQLCollations_h
#define mozilla_storage_SQLCollations_h

#include "mozStorageService.h"
#include "nscore.h"
#include "nsString.h"

#include "sqlite3.h"

namespace mozilla {
namespace storage {

/**
 * Registers the collating sequences declared here with the specified
 * database and Service.
 *
 * @param  aDB
 *         The database we'll be registering the collations with.
 * @param  aService
 *         The Service that owns the nsICollation used by our collations.
 * @return the SQLite status code indicating success or failure.
 */
int registerCollations(sqlite3 *aDB, Service *aService);

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

/**
 * Custom UTF-8 collating sequence that respects the application's locale.
 * Comparison is case- and accent-insensitive.  This is called by SQLite.
 *
 * @param  aService
 *         The Service that owns the nsICollation used by this collation.
 * @param  aLen1
 *         The number of bytes in aStr1.
 * @param  aStr1
 *         The string to be compared against aStr2.  It will be passed in by
 *         SQLite as a non-null-terminated char* buffer.
 * @param  aLen2
 *         The number of bytes in aStr2.
 * @param  aStr2
 *         The string to be compared against aStr1.  It will be passed in by
 *         SQLite as a non-null-terminated char* buffer.
 * @return aStr1 - aStr2.  That is, if aStr1 < aStr2, returns a negative number.
 *         If aStr1 > aStr2, returns a positive number.  If aStr1 == aStr2,
 *         returns 0.
 */
int localeCollation8(void *aService, int aLen1, const void *aStr1, int aLen2,
                     const void *aStr2);

/**
 * Custom UTF-8 collating sequence that respects the application's locale.
 * Comparison is case-sensitive and accent-insensitive.  This is called by
 * SQLite.
 *
 * @param  aService
 *         The Service that owns the nsICollation used by this collation.
 * @param  aLen1
 *         The number of bytes in aStr1.
 * @param  aStr1
 *         The string to be compared against aStr2.  It will be passed in by
 *         SQLite as a non-null-terminated char* buffer.
 * @param  aLen2
 *         The number of bytes in aStr2.
 * @param  aStr2
 *         The string to be compared against aStr1.  It will be passed in by
 *         SQLite as a non-null-terminated char* buffer.
 * @return aStr1 - aStr2.  That is, if aStr1 < aStr2, returns a negative number.
 *         If aStr1 > aStr2, returns a positive number.  If aStr1 == aStr2,
 *         returns 0.
 */
int localeCollationCaseSensitive8(void *aService, int aLen1, const void *aStr1,
                                  int aLen2, const void *aStr2);

/**
 * Custom UTF-8 collating sequence that respects the application's locale.
 * Comparison is case-insensitive and accent-sensitive.  This is called by
 * SQLite.
 *
 * @param  aService
 *         The Service that owns the nsICollation used by this collation.
 * @param  aLen1
 *         The number of bytes in aStr1.
 * @param  aStr1
 *         The string to be compared against aStr2.  It will be passed in by
 *         SQLite as a non-null-terminated char* buffer.
 * @param  aLen2
 *         The number of bytes in aStr2.
 * @param  aStr2
 *         The string to be compared against aStr1.  It will be passed in by
 *         SQLite as a non-null-terminated char* buffer.
 * @return aStr1 - aStr2.  That is, if aStr1 < aStr2, returns a negative number.
 *         If aStr1 > aStr2, returns a positive number.  If aStr1 == aStr2,
 *         returns 0.
 */
int localeCollationAccentSensitive8(void *aService, int aLen1,
                                    const void *aStr1, int aLen2,
                                    const void *aStr2);

/**
 * Custom UTF-8 collating sequence that respects the application's locale.
 * Comparison is case- and accent-sensitive.  This is called by SQLite.
 *
 * @param  aService
 *         The Service that owns the nsICollation used by this collation.
 * @param  aLen1
 *         The number of bytes in aStr1.
 * @param  aStr1
 *         The string to be compared against aStr2.  It will be passed in by
 *         SQLite as a non-null-terminated char* buffer.
 * @param  aLen2
 *         The number of bytes in aStr2.
 * @param  aStr2
 *         The string to be compared against aStr1.  It will be passed in by
 *         SQLite as a non-null-terminated char* buffer.
 * @return aStr1 - aStr2.  That is, if aStr1 < aStr2, returns a negative number.
 *         If aStr1 > aStr2, returns a positive number.  If aStr1 == aStr2,
 *         returns 0.
 */
int localeCollationCaseAccentSensitive8(void *aService, int aLen1,
                                        const void *aStr1, int aLen2,
                                        const void *aStr2);

/**
 * Custom UTF-16 collating sequence that respects the application's locale.
 * Comparison is case- and accent-insensitive.  This is called by SQLite.
 *
 * @param  aService
 *         The Service that owns the nsICollation used by this collation.
 * @param  aLen1
 *         The number of bytes (not characters) in aStr1.
 * @param  aStr1
 *         The string to be compared against aStr2.  It will be passed in by
 *         SQLite as a non-null-terminated char16_t* buffer.
 * @param  aLen2
 *         The number of bytes (not characters) in aStr2.
 * @param  aStr2
 *         The string to be compared against aStr1.  It will be passed in by
 *         SQLite as a non-null-terminated char16_t* buffer.
 * @return aStr1 - aStr2.  That is, if aStr1 < aStr2, returns a negative number.
 *         If aStr1 > aStr2, returns a positive number.  If aStr1 == aStr2,
 *         returns 0.
 */
int localeCollation16(void *aService, int aLen1, const void *aStr1, int aLen2,
                      const void *aStr2);

/**
 * Custom UTF-16 collating sequence that respects the application's locale.
 * Comparison is case-sensitive and accent-insensitive.  This is called by
 * SQLite.
 *
 * @param  aService
 *         The Service that owns the nsICollation used by this collation.
 * @param  aLen1
 *         The number of bytes (not characters) in aStr1.
 * @param  aStr1
 *         The string to be compared against aStr2.  It will be passed in by
 *         SQLite as a non-null-terminated char16_t* buffer.
 * @param  aLen2
 *         The number of bytes (not characters) in aStr2.
 * @param  aStr2
 *         The string to be compared against aStr1.  It will be passed in by
 *         SQLite as a non-null-terminated char16_t* buffer.
 * @return aStr1 - aStr2.  That is, if aStr1 < aStr2, returns a negative number.
 *         If aStr1 > aStr2, returns a positive number.  If aStr1 == aStr2,
 *         returns 0.
 */
int localeCollationCaseSensitive16(void *aService, int aLen1, const void *aStr1,
                                   int aLen2, const void *aStr2);

/**
 * Custom UTF-16 collating sequence that respects the application's locale.
 * Comparison is case-insensitive and accent-sensitive.  This is called by
 * SQLite.
 *
 * @param  aService
 *         The Service that owns the nsICollation used by this collation.
 * @param  aLen1
 *         The number of bytes (not characters) in aStr1.
 * @param  aStr1
 *         The string to be compared against aStr2.  It will be passed in by
 *         SQLite as a non-null-terminated char16_t* buffer.
 * @param  aLen2
 *         The number of bytes (not characters) in aStr2.
 * @param  aStr2
 *         The string to be compared against aStr1.  It will be passed in by
 *         SQLite as a non-null-terminated char16_t* buffer.
 * @return aStr1 - aStr2.  That is, if aStr1 < aStr2, returns a negative number.
 *         If aStr1 > aStr2, returns a positive number.  If aStr1 == aStr2,
 *         returns 0.
 */
int localeCollationAccentSensitive16(void *aService, int aLen1,
                                     const void *aStr1, int aLen2,
                                     const void *aStr2);

/**
 * Custom UTF-16 collating sequence that respects the application's locale.
 * Comparison is case- and accent-sensitive.  This is called by SQLite.
 *
 * @param  aService
 *         The Service that owns the nsICollation used by this collation.
 * @param  aLen1
 *         The number of bytes (not characters) in aStr1.
 * @param  aStr1
 *         The string to be compared against aStr2.  It will be passed in by
 *         SQLite as a non-null-terminated char16_t* buffer.
 * @param  aLen2
 *         The number of bytes (not characters) in aStr2.
 * @param  aStr2
 *         The string to be compared against aStr1.  It will be passed in by
 *         SQLite as a non-null-terminated char16_t* buffer.
 * @return aStr1 - aStr2.  That is, if aStr1 < aStr2, returns a negative number.
 *         If aStr1 > aStr2, returns a positive number.  If aStr1 == aStr2,
 *         returns 0.
 */
int localeCollationCaseAccentSensitive16(void *aService, int aLen1,
                                         const void *aStr1, int aLen2,
                                         const void *aStr2);

}  // namespace storage
}  // namespace mozilla

#endif  // mozilla_storage_SQLCollations_h