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gecko-dev/storage/mozStorageStatement.cpp

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/* -*- 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/. */
#include <limits.h>
#include <stdio.h>
#include "nsError.h"
#include "nsMemory.h"
#include "nsThreadUtils.h"
#include "nsIClassInfoImpl.h"
#include "Variant.h"
#include "mozIStorageError.h"
#include "mozStorageBindingParams.h"
#include "mozStorageConnection.h"
#include "mozStorageStatementJSHelper.h"
#include "mozStoragePrivateHelpers.h"
#include "mozStorageStatementParams.h"
#include "mozStorageStatementRow.h"
#include "mozStorageStatement.h"
#include "GeckoProfiler.h"
#include "nsDOMClassInfo.h"
#include "mozilla/Logging.h"
extern mozilla::LazyLogModule gStorageLog;
namespace mozilla {
namespace storage {
////////////////////////////////////////////////////////////////////////////////
//// nsIClassInfo
NS_IMPL_CI_INTERFACE_GETTER(Statement,
mozIStorageStatement,
mozIStorageBaseStatement,
mozIStorageBindingParams,
mozIStorageValueArray,
mozilla::storage::StorageBaseStatementInternal)
class StatementClassInfo : public nsIClassInfo
{
public:
constexpr StatementClassInfo() {}
NS_DECL_ISUPPORTS_INHERITED
NS_IMETHOD
GetInterfaces(uint32_t *_count, nsIID ***_array) override
{
return NS_CI_INTERFACE_GETTER_NAME(Statement)(_count, _array);
}
NS_IMETHOD
GetScriptableHelper(nsIXPCScriptable **_helper) override
{
static StatementJSHelper sJSHelper;
*_helper = &sJSHelper;
return NS_OK;
}
NS_IMETHOD
GetContractID(char **_contractID) override
{
*_contractID = nullptr;
return NS_OK;
}
NS_IMETHOD
GetClassDescription(char **_desc) override
{
*_desc = nullptr;
return NS_OK;
}
NS_IMETHOD
GetClassID(nsCID **_id) override
{
*_id = nullptr;
return NS_OK;
}
NS_IMETHOD
GetFlags(uint32_t *_flags) override
{
*_flags = 0;
return NS_OK;
}
NS_IMETHOD
GetClassIDNoAlloc(nsCID *_cid) override
{
return NS_ERROR_NOT_AVAILABLE;
}
};
NS_IMETHODIMP_(MozExternalRefCountType) StatementClassInfo::AddRef() { return 2; }
NS_IMETHODIMP_(MozExternalRefCountType) StatementClassInfo::Release() { return 1; }
NS_IMPL_QUERY_INTERFACE(StatementClassInfo, nsIClassInfo)
static StatementClassInfo sStatementClassInfo;
////////////////////////////////////////////////////////////////////////////////
//// Statement
Statement::Statement()
: StorageBaseStatementInternal()
, mDBStatement(nullptr)
, mColumnNames()
, mExecuting(false)
{
}
nsresult
Statement::initialize(Connection *aDBConnection,
sqlite3 *aNativeConnection,
const nsACString &aSQLStatement)
{
MOZ_ASSERT(aDBConnection, "No database connection given!");
MOZ_ASSERT(!aDBConnection->isClosed(), "Database connection should be valid");
MOZ_ASSERT(!mDBStatement, "Statement already initialized!");
MOZ_ASSERT(aNativeConnection, "No native connection given!");
int srv = aDBConnection->prepareStatement(aNativeConnection,
PromiseFlatCString(aSQLStatement),
&mDBStatement);
if (srv != SQLITE_OK) {
MOZ_LOG(gStorageLog, LogLevel::Error,
("Sqlite statement prepare error: %d '%s'", srv,
::sqlite3_errmsg(aNativeConnection)));
MOZ_LOG(gStorageLog, LogLevel::Error,
("Statement was: '%s'", PromiseFlatCString(aSQLStatement).get()));
return NS_ERROR_FAILURE;
}
MOZ_LOG(gStorageLog, LogLevel::Debug, ("Initialized statement '%s' (0x%p)",
PromiseFlatCString(aSQLStatement).get(),
mDBStatement));
mDBConnection = aDBConnection;
mNativeConnection = aNativeConnection;
mParamCount = ::sqlite3_bind_parameter_count(mDBStatement);
mResultColumnCount = ::sqlite3_column_count(mDBStatement);
mColumnNames.Clear();
nsCString* columnNames = mColumnNames.AppendElements(mResultColumnCount);
for (uint32_t i = 0; i < mResultColumnCount; i++) {
const char *name = ::sqlite3_column_name(mDBStatement, i);
columnNames[i].Assign(name);
}
#ifdef DEBUG
// We want to try and test for LIKE and that consumers are using
// escapeStringForLIKE instead of just trusting user input. The idea to
// check to see if they are binding a parameter after like instead of just
// using a string. We only do this in debug builds because it's expensive!
const nsCaseInsensitiveCStringComparator c;
nsACString::const_iterator start, end, e;
aSQLStatement.BeginReading(start);
aSQLStatement.EndReading(end);
e = end;
while (::FindInReadable(NS_LITERAL_CSTRING(" LIKE"), start, e, c)) {
// We have a LIKE in here, so we perform our tests
// FindInReadable moves the iterator, so we have to get a new one for
// each test we perform.
nsACString::const_iterator s1, s2, s3;
s1 = s2 = s3 = start;
if (!(::FindInReadable(NS_LITERAL_CSTRING(" LIKE ?"), s1, end, c) ||
::FindInReadable(NS_LITERAL_CSTRING(" LIKE :"), s2, end, c) ||
::FindInReadable(NS_LITERAL_CSTRING(" LIKE @"), s3, end, c))) {
// At this point, we didn't find a LIKE statement followed by ?, :,
// or @, all of which are valid characters for binding a parameter.
// We will warn the consumer that they may not be safely using LIKE.
NS_WARNING("Unsafe use of LIKE detected! Please ensure that you "
"are using mozIStorageStatement::escapeStringForLIKE "
"and that you are binding that result to the statement "
"to prevent SQL injection attacks.");
}
// resetting start and e
start = e;
e = end;
}
#endif
return NS_OK;
}
mozIStorageBindingParams *
Statement::getParams()
{
nsresult rv;
// If we do not have an array object yet, make it.
if (!mParamsArray) {
nsCOMPtr<mozIStorageBindingParamsArray> array;
rv = NewBindingParamsArray(getter_AddRefs(array));
NS_ENSURE_SUCCESS(rv, nullptr);
mParamsArray = static_cast<BindingParamsArray *>(array.get());
}
// If there isn't already any rows added, we'll have to add one to use.
if (mParamsArray->length() == 0) {
RefPtr<BindingParams> params(new BindingParams(mParamsArray, this));
NS_ENSURE_TRUE(params, nullptr);
rv = mParamsArray->AddParams(params);
NS_ENSURE_SUCCESS(rv, nullptr);
// We have to unlock our params because AddParams locks them. This is safe
// because no reference to the params object was, or ever will be given out.
params->unlock(this);
// We also want to lock our array at this point - we don't want anything to
// be added to it. Nothing has, or will ever get a reference to it, but we
// will get additional safety checks via assertions by doing this.
mParamsArray->lock();
}
return *mParamsArray->begin();
}
Statement::~Statement()
{
(void)internalFinalize(true);
}
////////////////////////////////////////////////////////////////////////////////
//// nsISupports
NS_IMPL_ADDREF(Statement)
NS_IMPL_RELEASE(Statement)
NS_INTERFACE_MAP_BEGIN(Statement)
NS_INTERFACE_MAP_ENTRY(mozIStorageStatement)
NS_INTERFACE_MAP_ENTRY(mozIStorageBaseStatement)
NS_INTERFACE_MAP_ENTRY(mozIStorageBindingParams)
NS_INTERFACE_MAP_ENTRY(mozIStorageValueArray)
NS_INTERFACE_MAP_ENTRY(mozilla::storage::StorageBaseStatementInternal)
if (aIID.Equals(NS_GET_IID(nsIClassInfo))) {
foundInterface = static_cast<nsIClassInfo *>(&sStatementClassInfo);
}
else
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, mozIStorageStatement)
NS_INTERFACE_MAP_END
////////////////////////////////////////////////////////////////////////////////
//// StorageBaseStatementInternal
Connection *
Statement::getOwner()
{
return mDBConnection;
}
int
Statement::getAsyncStatement(sqlite3_stmt **_stmt)
{
// If we have no statement, we shouldn't be calling this method!
NS_ASSERTION(mDBStatement != nullptr, "We have no statement to clone!");
// If we do not yet have a cached async statement, clone our statement now.
if (!mAsyncStatement) {
nsDependentCString sql(::sqlite3_sql(mDBStatement));
int rc = mDBConnection->prepareStatement(mNativeConnection, sql,
&mAsyncStatement);
if (rc != SQLITE_OK) {
*_stmt = nullptr;
return rc;
}
MOZ_LOG(gStorageLog, LogLevel::Debug,
("Cloned statement 0x%p to 0x%p", mDBStatement, mAsyncStatement));
}
*_stmt = mAsyncStatement;
return SQLITE_OK;
}
nsresult
Statement::getAsynchronousStatementData(StatementData &_data)
{
if (!mDBStatement)
return NS_ERROR_UNEXPECTED;
sqlite3_stmt *stmt;
int rc = getAsyncStatement(&stmt);
if (rc != SQLITE_OK)
return convertResultCode(rc);
_data = StatementData(stmt, bindingParamsArray(), this);
return NS_OK;
}
already_AddRefed<mozIStorageBindingParams>
Statement::newBindingParams(mozIStorageBindingParamsArray *aOwner)
{
nsCOMPtr<mozIStorageBindingParams> params = new BindingParams(aOwner, this);
return params.forget();
}
////////////////////////////////////////////////////////////////////////////////
//// mozIStorageStatement
// proxy to StorageBaseStatementInternal using its define helper.
MIXIN_IMPL_STORAGEBASESTATEMENTINTERNAL(Statement, (void)0;)
NS_IMETHODIMP
Statement::Clone(mozIStorageStatement **_statement)
{
RefPtr<Statement> statement(new Statement());
NS_ENSURE_TRUE(statement, NS_ERROR_OUT_OF_MEMORY);
nsAutoCString sql(::sqlite3_sql(mDBStatement));
nsresult rv = statement->initialize(mDBConnection, mNativeConnection, sql);
NS_ENSURE_SUCCESS(rv, rv);
statement.forget(_statement);
return NS_OK;
}
NS_IMETHODIMP
Statement::Finalize()
{
return internalFinalize(false);
}
nsresult
Statement::internalFinalize(bool aDestructing)
{
if (!mDBStatement)
return NS_OK;
int srv = SQLITE_OK;
if (!mDBConnection->isClosed()) {
//
// The connection is still open. While statement finalization and
// closing may, in some cases, take place in two distinct threads,
// we have a guarantee that the connection will remain open until
// this method terminates:
//
// a. The connection will be closed synchronously. In this case,
// there is no race condition, as everything takes place on the
// same thread.
//
// b. The connection is closed asynchronously and this code is
// executed on the opener thread. In this case, asyncClose() has
// not been called yet and will not be called before we return
// from this function.
//
// c. The connection is closed asynchronously and this code is
// executed on the async execution thread. In this case,
// AsyncCloseConnection::Run() has not been called yet and will
// not be called before we return from this function.
//
// In either case, the connection is still valid, hence closing
// here is safe.
//
MOZ_LOG(gStorageLog, LogLevel::Debug, ("Finalizing statement '%s' during garbage-collection",
::sqlite3_sql(mDBStatement)));
srv = ::sqlite3_finalize(mDBStatement);
}
#ifdef DEBUG
else {
//
// The database connection is either closed or closing. The sqlite
// statement has either been finalized already by the connection
// or is about to be finalized by the connection.
//
// Finalizing it here would be useless and segfaultish.
//
char *msg = ::PR_smprintf("SQL statement (%x) should have been finalized"
" before garbage-collection. For more details on this statement, set"
" NSPR_LOG_MESSAGES=mozStorage:5 .",
mDBStatement);
//
// Note that we can't display the statement itself, as the data structure
// is not valid anymore. However, the address shown here should help
// developers correlate with the more complete debug message triggered
// by AsyncClose().
//
#if 0
// Deactivate the warning until we have fixed the exising culprit
// (see bug 914070).
NS_WARNING(msg);
#endif // 0
MOZ_LOG(gStorageLog, LogLevel::Warning, (msg));
::PR_smprintf_free(msg);
}
#endif
mDBStatement = nullptr;
if (mAsyncStatement) {
// If the destructor called us, there are no pending async statements (they
// hold a reference to us) and we can/must just kill the statement directly.
if (aDestructing)
destructorAsyncFinalize();
else
asyncFinalize();
}
// Release the holders, so they can release the reference to us.
mStatementParamsHolder = nullptr;
mStatementRowHolder = nullptr;
return convertResultCode(srv);
}
NS_IMETHODIMP
Statement::GetParameterCount(uint32_t *_parameterCount)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
*_parameterCount = mParamCount;
return NS_OK;
}
NS_IMETHODIMP
Statement::GetParameterName(uint32_t aParamIndex,
nsACString &_name)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
ENSURE_INDEX_VALUE(aParamIndex, mParamCount);
const char *name = ::sqlite3_bind_parameter_name(mDBStatement,
aParamIndex + 1);
if (name == nullptr) {
// this thing had no name, so fake one
nsAutoCString fakeName(":");
fakeName.AppendInt(aParamIndex);
_name.Assign(fakeName);
}
else {
_name.Assign(nsDependentCString(name));
}
return NS_OK;
}
NS_IMETHODIMP
Statement::GetParameterIndex(const nsACString &aName,
uint32_t *_index)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
// We do not accept any forms of names other than ":name", but we need to add
// the colon for SQLite.
nsAutoCString name(":");
name.Append(aName);
int ind = ::sqlite3_bind_parameter_index(mDBStatement, name.get());
if (ind == 0) // Named parameter not found.
return NS_ERROR_INVALID_ARG;
*_index = ind - 1; // SQLite indexes are 1-based, we are 0-based.
return NS_OK;
}
NS_IMETHODIMP
Statement::GetColumnCount(uint32_t *_columnCount)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
*_columnCount = mResultColumnCount;
return NS_OK;
}
NS_IMETHODIMP
Statement::GetColumnName(uint32_t aColumnIndex,
nsACString &_name)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
ENSURE_INDEX_VALUE(aColumnIndex, mResultColumnCount);
const char *cname = ::sqlite3_column_name(mDBStatement, aColumnIndex);
_name.Assign(nsDependentCString(cname));
return NS_OK;
}
NS_IMETHODIMP
Statement::GetColumnIndex(const nsACString &aName,
uint32_t *_index)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
// Surprisingly enough, SQLite doesn't provide an API for this. We have to
// determine it ourselves sadly.
for (uint32_t i = 0; i < mResultColumnCount; i++) {
if (mColumnNames[i].Equals(aName)) {
*_index = i;
return NS_OK;
}
}
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP
Statement::Reset()
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
#ifdef DEBUG
MOZ_LOG(gStorageLog, LogLevel::Debug, ("Resetting statement: '%s'",
::sqlite3_sql(mDBStatement)));
checkAndLogStatementPerformance(mDBStatement);
#endif
mParamsArray = nullptr;
(void)sqlite3_reset(mDBStatement);
(void)sqlite3_clear_bindings(mDBStatement);
mExecuting = false;
return NS_OK;
}
NS_IMETHODIMP
Statement::BindParameters(mozIStorageBindingParamsArray *aParameters)
{
NS_ENSURE_ARG_POINTER(aParameters);
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
BindingParamsArray *array = static_cast<BindingParamsArray *>(aParameters);
if (array->getOwner() != this)
return NS_ERROR_UNEXPECTED;
if (array->length() == 0)
return NS_ERROR_UNEXPECTED;
mParamsArray = array;
mParamsArray->lock();
return NS_OK;
}
NS_IMETHODIMP
Statement::Execute()
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
bool ret;
nsresult rv = ExecuteStep(&ret);
nsresult rv2 = Reset();
return NS_FAILED(rv) ? rv : rv2;
}
NS_IMETHODIMP
Statement::ExecuteStep(bool *_moreResults)
{
PROFILER_LABEL("Statement", "ExecuteStep",
js::ProfileEntry::Category::STORAGE);
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
// Bind any parameters first before executing.
if (mParamsArray) {
// If we have more than one row of parameters to bind, they shouldn't be
// calling this method (and instead use executeAsync).
if (mParamsArray->length() != 1)
return NS_ERROR_UNEXPECTED;
BindingParamsArray::iterator row = mParamsArray->begin();
nsCOMPtr<IStorageBindingParamsInternal> bindingInternal =
do_QueryInterface(*row);
nsCOMPtr<mozIStorageError> error = bindingInternal->bind(mDBStatement);
if (error) {
int32_t srv;
(void)error->GetResult(&srv);
return convertResultCode(srv);
}
// We have bound, so now we can clear our array.
mParamsArray = nullptr;
}
int srv = mDBConnection->stepStatement(mNativeConnection, mDBStatement);
if (srv != SQLITE_ROW && srv != SQLITE_DONE && MOZ_LOG_TEST(gStorageLog, LogLevel::Debug)) {
nsAutoCString errStr;
(void)mDBConnection->GetLastErrorString(errStr);
MOZ_LOG(gStorageLog, LogLevel::Debug,
("Statement::ExecuteStep error: %s", errStr.get()));
}
// SQLITE_ROW and SQLITE_DONE are non-errors
if (srv == SQLITE_ROW) {
// we got a row back
mExecuting = true;
*_moreResults = true;
return NS_OK;
}
else if (srv == SQLITE_DONE) {
// statement is done (no row returned)
mExecuting = false;
*_moreResults = false;
return NS_OK;
}
else if (srv == SQLITE_BUSY || srv == SQLITE_MISUSE) {
mExecuting = false;
}
else if (mExecuting) {
MOZ_LOG(gStorageLog, LogLevel::Error,
("SQLite error after mExecuting was true!"));
mExecuting = false;
}
return convertResultCode(srv);
}
NS_IMETHODIMP
Statement::GetState(int32_t *_state)
{
if (!mDBStatement)
*_state = MOZ_STORAGE_STATEMENT_INVALID;
else if (mExecuting)
*_state = MOZ_STORAGE_STATEMENT_EXECUTING;
else
*_state = MOZ_STORAGE_STATEMENT_READY;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
//// mozIStorageValueArray (now part of mozIStorageStatement too)
NS_IMETHODIMP
Statement::GetNumEntries(uint32_t *_length)
{
*_length = mResultColumnCount;
return NS_OK;
}
NS_IMETHODIMP
Statement::GetTypeOfIndex(uint32_t aIndex,
int32_t *_type)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
if (!mExecuting)
return NS_ERROR_UNEXPECTED;
int t = ::sqlite3_column_type(mDBStatement, aIndex);
switch (t) {
case SQLITE_INTEGER:
*_type = mozIStorageStatement::VALUE_TYPE_INTEGER;
break;
case SQLITE_FLOAT:
*_type = mozIStorageStatement::VALUE_TYPE_FLOAT;
break;
case SQLITE_TEXT:
*_type = mozIStorageStatement::VALUE_TYPE_TEXT;
break;
case SQLITE_BLOB:
*_type = mozIStorageStatement::VALUE_TYPE_BLOB;
break;
case SQLITE_NULL:
*_type = mozIStorageStatement::VALUE_TYPE_NULL;
break;
default:
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
Statement::GetInt32(uint32_t aIndex,
int32_t *_value)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
if (!mExecuting)
return NS_ERROR_UNEXPECTED;
*_value = ::sqlite3_column_int(mDBStatement, aIndex);
return NS_OK;
}
NS_IMETHODIMP
Statement::GetInt64(uint32_t aIndex,
int64_t *_value)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
if (!mExecuting)
return NS_ERROR_UNEXPECTED;
*_value = ::sqlite3_column_int64(mDBStatement, aIndex);
return NS_OK;
}
NS_IMETHODIMP
Statement::GetDouble(uint32_t aIndex,
double *_value)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
if (!mExecuting)
return NS_ERROR_UNEXPECTED;
*_value = ::sqlite3_column_double(mDBStatement, aIndex);
return NS_OK;
}
NS_IMETHODIMP
Statement::GetUTF8String(uint32_t aIndex,
nsACString &_value)
{
// Get type of Index will check aIndex for us, so we don't have to.
int32_t type;
nsresult rv = GetTypeOfIndex(aIndex, &type);
NS_ENSURE_SUCCESS(rv, rv);
if (type == mozIStorageStatement::VALUE_TYPE_NULL) {
// NULL columns should have IsVoid set to distinguish them from the empty
// string.
_value.SetIsVoid(true);
}
else {
const char *value =
reinterpret_cast<const char *>(::sqlite3_column_text(mDBStatement,
aIndex));
_value.Assign(value, ::sqlite3_column_bytes(mDBStatement, aIndex));
}
return NS_OK;
}
NS_IMETHODIMP
Statement::GetString(uint32_t aIndex,
nsAString &_value)
{
// Get type of Index will check aIndex for us, so we don't have to.
int32_t type;
nsresult rv = GetTypeOfIndex(aIndex, &type);
NS_ENSURE_SUCCESS(rv, rv);
if (type == mozIStorageStatement::VALUE_TYPE_NULL) {
// NULL columns should have IsVoid set to distinguish them from the empty
// string.
_value.SetIsVoid(true);
} else {
const char16_t *value =
static_cast<const char16_t *>(::sqlite3_column_text16(mDBStatement,
aIndex));
_value.Assign(value, ::sqlite3_column_bytes16(mDBStatement, aIndex) / 2);
}
return NS_OK;
}
NS_IMETHODIMP
Statement::GetBlob(uint32_t aIndex,
uint32_t *_size,
uint8_t **_blob)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
if (!mExecuting)
return NS_ERROR_UNEXPECTED;
int size = ::sqlite3_column_bytes(mDBStatement, aIndex);
void *blob = nullptr;
if (size) {
blob = nsMemory::Clone(::sqlite3_column_blob(mDBStatement, aIndex), size);
NS_ENSURE_TRUE(blob, NS_ERROR_OUT_OF_MEMORY);
}
*_blob = static_cast<uint8_t *>(blob);
*_size = size;
return NS_OK;
}
NS_IMETHODIMP
Statement::GetBlobAsString(uint32_t aIndex, nsAString& aValue)
{
return DoGetBlobAsString(this, aIndex, aValue);
}
NS_IMETHODIMP
Statement::GetBlobAsUTF8String(uint32_t aIndex, nsACString& aValue)
{
return DoGetBlobAsString(this, aIndex, aValue);
}
NS_IMETHODIMP
Statement::GetSharedUTF8String(uint32_t aIndex,
uint32_t *_length,
const char **_value)
{
if (_length)
*_length = ::sqlite3_column_bytes(mDBStatement, aIndex);
*_value = reinterpret_cast<const char *>(::sqlite3_column_text(mDBStatement,
aIndex));
return NS_OK;
}
NS_IMETHODIMP
Statement::GetSharedString(uint32_t aIndex,
uint32_t *_length,
const char16_t **_value)
{
if (_length)
*_length = ::sqlite3_column_bytes16(mDBStatement, aIndex);
*_value = static_cast<const char16_t *>(::sqlite3_column_text16(mDBStatement,
aIndex));
return NS_OK;
}
NS_IMETHODIMP
Statement::GetSharedBlob(uint32_t aIndex,
uint32_t *_size,
const uint8_t **_blob)
{
*_size = ::sqlite3_column_bytes(mDBStatement, aIndex);
*_blob = static_cast<const uint8_t *>(::sqlite3_column_blob(mDBStatement,
aIndex));
return NS_OK;
}
NS_IMETHODIMP
Statement::GetIsNull(uint32_t aIndex,
bool *_isNull)
{
// Get type of Index will check aIndex for us, so we don't have to.
int32_t type;
nsresult rv = GetTypeOfIndex(aIndex, &type);
NS_ENSURE_SUCCESS(rv, rv);
*_isNull = (type == mozIStorageStatement::VALUE_TYPE_NULL);
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
//// mozIStorageBindingParams
BOILERPLATE_BIND_PROXIES(
Statement,
if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
)
} // namespace storage
} // namespace mozilla
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