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c9061686f8
Includes baddataDB.sqlite which is a copy of goodDB.sqlite but with what appears to be the row count inflated beyond the end of the file. This causes loading the database to succeed but queries to fail. This increments a scalar for every database open and for every database query where a query is the full execution of a statement from start to completion. If a statement is re-used then the scalar will be incremented once for each use. Differential Revision: https://phabricator.services.mozilla.com/D73938
146 lines
4.6 KiB
C++
146 lines
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozStoragePrivateHelpers_h
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#define mozStoragePrivateHelpers_h
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/**
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* This file contains convenience methods for mozStorage.
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*/
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#include "sqlite3.h"
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#include "nsIVariant.h"
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#include "nsError.h"
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#include "js/TypeDecls.h"
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#include "Variant.h"
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class mozIStorageCompletionCallback;
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class nsIRunnable;
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namespace mozilla {
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namespace storage {
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////////////////////////////////////////////////////////////////////////////////
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//// Macros
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#define ENSURE_INDEX_VALUE(aIndex, aCount) \
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NS_ENSURE_TRUE(aIndex < aCount, NS_ERROR_INVALID_ARG)
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////////////////////////////////////////////////////////////////////////////////
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//// Functions
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/**
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* Returns true if the given SQLite result is an error of come kind.
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*
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* @param aSQLiteResultCode
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* The SQLite return code to check.
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* @returns true if the result represents an error.
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*/
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bool isErrorCode(int aSQLiteResultCode);
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/**
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* Converts a SQLite return code to an nsresult return code.
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*
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* @param aSQLiteResultCode
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* The SQLite return code to convert.
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* @returns the corresponding nsresult code for aSQLiteResultCode.
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*/
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nsresult convertResultCode(int aSQLiteResultCode);
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/**
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* Checks the performance of a SQLite statement and logs a warning with
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* NS_WARNING. Currently this only checks the number of sort operations done
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* on a statement, and if more than zero have been done, the statement can be
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* made faster with the careful use of an index.
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*
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* @param aStatement
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* The sqlite3_stmt object to check.
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*/
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void checkAndLogStatementPerformance(sqlite3_stmt* aStatement);
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/**
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* Convert the provided JS::Value into a variant representation if possible.
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*
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* @param aCtx
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* The JSContext the value is from.
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* @param aValue
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* The JavaScript value to convert. All primitive types are supported,
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* but only Date objects are supported from the Date family. Date
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* objects are coerced to PRTime (nanoseconds since epoch) values.
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* @return the variant if conversion was successful, nullptr if conversion
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* failed. The caller is responsible for addref'ing if non-null.
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*/
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nsIVariant* convertJSValToVariant(JSContext* aCtx, const JS::Value& aValue);
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/**
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* Convert a provided nsIVariant implementation to our own thread-safe
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* refcounting implementation, if needed.
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*
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* @param aValue
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* The original nsIVariant to be converted.
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* @return a thread-safe refcounting nsIVariant implementation.
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*/
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Variant_base* convertVariantToStorageVariant(nsIVariant* aVariant);
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/**
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* Obtains an event that will notify a completion callback about completion.
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*
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* @param aCallback
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* The callback to be notified.
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* @return an nsIRunnable that can be dispatched to the calling thread.
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*/
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already_AddRefed<nsIRunnable> newCompletionEvent(
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mozIStorageCompletionCallback* aCallback);
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/**
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* Utility method to get a Blob as a string value. The string expects
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* the interface exposed by nsAString/nsACString/etc.
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*/
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template <class T, class V>
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nsresult DoGetBlobAsString(T* aThis, uint32_t aIndex, V& aValue) {
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typedef typename V::char_type char_type;
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uint32_t size;
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char_type* blob;
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nsresult rv =
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aThis->GetBlob(aIndex, &size, reinterpret_cast<uint8_t**>(&blob));
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NS_ENSURE_SUCCESS(rv, rv);
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aValue.Assign(blob, size / sizeof(char_type));
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delete[] blob;
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return NS_OK;
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}
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/**
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* Utility method to bind a string value as a Blob. The string expects
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* the interface exposed by nsAString/nsACString/etc.
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*/
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template <class T, class V>
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nsresult DoBindStringAsBlobByName(T* aThis, const nsACString& aName,
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const V& aValue) {
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typedef typename V::char_type char_type;
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return aThis->BindBlobByName(
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aName, reinterpret_cast<const uint8_t*>(aValue.BeginReading()),
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aValue.Length() * sizeof(char_type));
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}
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/**
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* Utility method to bind a string value as a Blob. The string expects
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* the interface exposed by nsAString/nsACString/etc.
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*/
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template <class T, class V>
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nsresult DoBindStringAsBlobByIndex(T* aThis, uint32_t aIndex, const V& aValue) {
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typedef typename V::char_type char_type;
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return aThis->BindBlobByIndex(
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aIndex, reinterpret_cast<const uint8_t*>(aValue.BeginReading()),
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aValue.Length() * sizeof(char_type));
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}
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} // namespace storage
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} // namespace mozilla
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#endif // mozStoragePrivateHelpers_h
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