mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 08:35:26 +00:00
2ad2ca17e9
MozReview-Commit-ID: HOsMvsjBJKF --HG-- extra : source : cac755e67ad9739d72f78a184f20bafd845e514f
144 lines
4.4 KiB
C++
144 lines
4.4 KiB
C++
/* -*- 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 mozStoragePrivateHelpers_h
|
|
#define mozStoragePrivateHelpers_h
|
|
|
|
/**
|
|
* This file contains convenience methods for mozStorage.
|
|
*/
|
|
|
|
#include "sqlite3.h"
|
|
#include "nsIVariant.h"
|
|
#include "nsError.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "js/TypeDecls.h"
|
|
#include "Variant.h"
|
|
|
|
class mozIStorageCompletionCallback;
|
|
class nsIRunnable;
|
|
|
|
namespace mozilla {
|
|
namespace storage {
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//// Macros
|
|
|
|
#define ENSURE_INDEX_VALUE(aIndex, aCount) \
|
|
NS_ENSURE_TRUE(aIndex < aCount, NS_ERROR_INVALID_ARG)
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//// Functions
|
|
|
|
/**
|
|
* Converts a SQLite return code to an nsresult return code.
|
|
*
|
|
* @param aSQLiteResultCode
|
|
* The SQLite return code to convert.
|
|
* @returns the corresponding nsresult code for aSQLiteResultCode.
|
|
*/
|
|
nsresult convertResultCode(int aSQLiteResultCode);
|
|
|
|
/**
|
|
* Checks the performance of a SQLite statement and logs a warning with
|
|
* NS_WARNING. Currently this only checks the number of sort operations done
|
|
* on a statement, and if more than zero have been done, the statement can be
|
|
* made faster with the careful use of an index.
|
|
*
|
|
* @param aStatement
|
|
* The sqlite3_stmt object to check.
|
|
*/
|
|
void checkAndLogStatementPerformance(sqlite3_stmt *aStatement);
|
|
|
|
/**
|
|
* Convert the provided JS::Value into a variant representation if possible.
|
|
*
|
|
* @param aCtx
|
|
* The JSContext the value is from.
|
|
* @param aValue
|
|
* The JavaScript value to convert. All primitive types are supported,
|
|
* but only Date objects are supported from the Date family. Date
|
|
* objects are coerced to PRTime (nanoseconds since epoch) values.
|
|
* @return the variant if conversion was successful, nullptr if conversion
|
|
* failed. The caller is responsible for addref'ing if non-null.
|
|
*/
|
|
nsIVariant *convertJSValToVariant(JSContext *aCtx, JS::Value aValue);
|
|
|
|
/**
|
|
* Convert a provided nsIVariant implementation to our own thread-safe
|
|
* refcounting implementation, if needed.
|
|
*
|
|
* @param aValue
|
|
* The original nsIVariant to be converted.
|
|
* @return a thread-safe refcounting nsIVariant implementation.
|
|
*/
|
|
Variant_base *convertVariantToStorageVariant(nsIVariant *aVariant);
|
|
|
|
/**
|
|
* Obtains an event that will notify a completion callback about completion.
|
|
*
|
|
* @param aCallback
|
|
* The callback to be notified.
|
|
* @return an nsIRunnable that can be dispatched to the calling thread.
|
|
*/
|
|
already_AddRefed<nsIRunnable> newCompletionEvent(
|
|
mozIStorageCompletionCallback *aCallback
|
|
);
|
|
|
|
/**
|
|
* Utility method to get a Blob as a string value. The string expects
|
|
* the interface exposed by nsAString/nsACString/etc.
|
|
*/
|
|
template<class T, class V>
|
|
nsresult
|
|
DoGetBlobAsString(T* aThis, uint32_t aIndex, V& aValue)
|
|
{
|
|
typedef typename V::char_type char_type;
|
|
|
|
uint32_t size;
|
|
char_type* blob;
|
|
nsresult rv =
|
|
aThis->GetBlob(aIndex, &size, reinterpret_cast<uint8_t**>(&blob));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
aValue.Assign(blob, size / sizeof(char_type));
|
|
delete[] blob;
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Utility method to bind a string value as a Blob. The string expects
|
|
* the interface exposed by nsAString/nsACString/etc.
|
|
*/
|
|
template<class T, class V>
|
|
nsresult
|
|
DoBindStringAsBlobByName(T* aThis, const nsACString& aName, const V& aValue)
|
|
{
|
|
typedef typename V::char_type char_type;
|
|
return aThis->BindBlobByName(aName,
|
|
reinterpret_cast<const uint8_t*>(aValue.BeginReading()),
|
|
aValue.Length() * sizeof(char_type));
|
|
}
|
|
|
|
/**
|
|
* Utility method to bind a string value as a Blob. The string expects
|
|
* the interface exposed by nsAString/nsACString/etc.
|
|
*/
|
|
template<class T, class V>
|
|
nsresult
|
|
DoBindStringAsBlobByIndex(T* aThis, uint32_t aIndex, const V& aValue)
|
|
{
|
|
typedef typename V::char_type char_type;
|
|
return aThis->BindBlobByIndex(aIndex,
|
|
reinterpret_cast<const uint8_t*>(aValue.BeginReading()),
|
|
aValue.Length() * sizeof(char_type));
|
|
}
|
|
|
|
} // namespace storage
|
|
} // namespace mozilla
|
|
|
|
#endif // mozStoragePrivateHelpers_h
|