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pjs/storage/src/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\:>~ :
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Oracle Corporation code.
*
* The Initial Developer of the Original Code is
* Oracle Corporation
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Vladimir Vukicevic <vladimir.vukicevic@oracle.com>
* Shawn Wilsher <me@shawnwilsher.com>
* John Zhang <jzhang@aptana.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <limits.h>
#include <stdio.h>
#include "nsError.h"
#include "nsMemory.h"
#include "nsThreadUtils.h"
#include "nsIClassInfoImpl.h"
#include "nsIProgrammingLanguage.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 "prlog.h"
#include "mozilla/FunctionTimer.h"
#ifdef PR_LOGGING
extern PRLogModuleInfo* gStorageLog;
#endif
namespace mozilla {
namespace storage {
////////////////////////////////////////////////////////////////////////////////
//// nsIClassInfo
NS_IMPL_CI_INTERFACE_GETTER5(
Statement,
mozIStorageStatement,
mozIStorageBaseStatement,
mozIStorageBindingParams,
mozIStorageValueArray,
mozilla::storage::StorageBaseStatementInternal
)
class StatementClassInfo : public nsIClassInfo
{
public:
NS_DECL_ISUPPORTS
NS_IMETHODIMP
GetInterfaces(PRUint32 *_count, nsIID ***_array)
{
return NS_CI_INTERFACE_GETTER_NAME(Statement)(_count, _array);
}
NS_IMETHODIMP
GetHelperForLanguage(PRUint32 aLanguage, nsISupports **_helper)
{
if (aLanguage == nsIProgrammingLanguage::JAVASCRIPT) {
static StatementJSHelper sJSHelper;
*_helper = &sJSHelper;
return NS_OK;
}
*_helper = nsnull;
return NS_OK;
}
NS_IMETHODIMP
GetContractID(char **_contractID)
{
*_contractID = nsnull;
return NS_OK;
}
NS_IMETHODIMP
GetClassDescription(char **_desc)
{
*_desc = nsnull;
return NS_OK;
}
NS_IMETHODIMP
GetClassID(nsCID **_id)
{
*_id = nsnull;
return NS_OK;
}
NS_IMETHODIMP
GetImplementationLanguage(PRUint32 *_language)
{
*_language = nsIProgrammingLanguage::CPLUSPLUS;
return NS_OK;
}
NS_IMETHODIMP
GetFlags(PRUint32 *_flags)
{
*_flags = nsnull;
return NS_OK;
}
NS_IMETHODIMP
GetClassIDNoAlloc(nsCID *_cid)
{
return NS_ERROR_NOT_AVAILABLE;
}
};
NS_IMETHODIMP_(nsrefcnt) StatementClassInfo::AddRef() { return 2; }
NS_IMETHODIMP_(nsrefcnt) StatementClassInfo::Release() { return 1; }
NS_IMPL_QUERY_INTERFACE1(StatementClassInfo, nsIClassInfo)
static StatementClassInfo sStatementClassInfo;
////////////////////////////////////////////////////////////////////////////////
//// Statement
Statement::Statement()
: StorageBaseStatementInternal()
, mDBStatement(NULL)
, mColumnNames()
, mExecuting(false)
{
}
nsresult
Statement::initialize(Connection *aDBConnection,
const nsACString &aSQLStatement)
{
NS_ASSERTION(aDBConnection, "No database connection given!");
NS_ASSERTION(!mDBStatement, "Statement already initialized!");
sqlite3 *db = aDBConnection->GetNativeConnection();
NS_ASSERTION(db, "We should never be called with a null sqlite3 database!");
int srv = prepareStmt(db, PromiseFlatCString(aSQLStatement), &mDBStatement);
if (srv != SQLITE_OK) {
#ifdef PR_LOGGING
PR_LOG(gStorageLog, PR_LOG_ERROR,
("Sqlite statement prepare error: %d '%s'", srv,
::sqlite3_errmsg(db)));
PR_LOG(gStorageLog, PR_LOG_ERROR,
("Statement was: '%s'", PromiseFlatCString(aSQLStatement).get()));
#endif
return NS_ERROR_FAILURE;
}
#ifdef PR_LOGGING
PR_LOG(gStorageLog, PR_LOG_NOTICE, ("Initialized statement '%s' (0x%p)",
PromiseFlatCString(aSQLStatement).get(),
mDBStatement));
#endif
mDBConnection = aDBConnection;
mParamCount = ::sqlite3_bind_parameter_count(mDBStatement);
mResultColumnCount = ::sqlite3_column_count(mDBStatement);
mColumnNames.Clear();
for (PRUint32 i = 0; i < mResultColumnCount; i++) {
const char *name = ::sqlite3_column_name(mDBStatement, i);
(void)mColumnNames.AppendElement(nsDependentCString(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, nsnull);
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) {
nsRefPtr<BindingParams> params(new BindingParams(mParamsArray, this));
NS_ENSURE_TRUE(params, nsnull);
rv = mParamsArray->AddParams(params);
NS_ENSURE_SUCCESS(rv, nsnull);
// 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_THREADSAFE_ADDREF(Statement)
NS_IMPL_THREADSAFE_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 != NULL, "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 = prepareStmt(mDBConnection->GetNativeConnection(), sql,
&mAsyncStatement);
if (rc != SQLITE_OK) {
*_stmt = nsnull;
return rc;
}
#ifdef PR_LOGGING
PR_LOG(gStorageLog, PR_LOG_NOTICE,
("Cloned statement 0x%p to 0x%p", mDBStatement, mAsyncStatement));
#endif
}
*_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)
{
nsRefPtr<Statement> statement(new Statement());
NS_ENSURE_TRUE(statement, NS_ERROR_OUT_OF_MEMORY);
nsCAutoString sql(::sqlite3_sql(mDBStatement));
nsresult rv = statement->initialize(mDBConnection, 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;
#ifdef PR_LOGGING
PR_LOG(gStorageLog, PR_LOG_NOTICE, ("Finalizing statement '%s'",
::sqlite3_sql(mDBStatement)));
#endif
int srv = ::sqlite3_finalize(mDBStatement);
mDBStatement = NULL;
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)
internalAsyncFinalize();
else
asyncFinalize();
}
// We are considered dead at this point, so any wrappers for row or params
// need to lose their reference to us.
if (mStatementParamsHolder) {
nsCOMPtr<nsIXPConnectWrappedNative> wrapper =
do_QueryInterface(mStatementParamsHolder);
nsCOMPtr<mozIStorageStatementParams> iParams =
do_QueryWrappedNative(wrapper);
StatementParams *params = static_cast<StatementParams *>(iParams.get());
params->mStatement = nsnull;
mStatementParamsHolder = nsnull;
}
if (mStatementRowHolder) {
nsCOMPtr<nsIXPConnectWrappedNative> wrapper =
do_QueryInterface(mStatementRowHolder);
nsCOMPtr<mozIStorageStatementRow> iRow =
do_QueryWrappedNative(wrapper);
StatementRow *row = static_cast<StatementRow *>(iRow.get());
row->mStatement = nsnull;
mStatementRowHolder = nsnull;
}
return convertResultCode(srv);
}
NS_IMETHODIMP
Statement::GetParameterCount(PRUint32 *_parameterCount)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
*_parameterCount = mParamCount;
return NS_OK;
}
NS_IMETHODIMP
Statement::GetParameterName(PRUint32 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 == NULL) {
// this thing had no name, so fake one
nsCAutoString name(":");
name.AppendInt(aParamIndex);
_name.Assign(name);
}
else {
_name.Assign(nsDependentCString(name));
}
return NS_OK;
}
NS_IMETHODIMP
Statement::GetParameterIndex(const nsACString &aName,
PRUint32 *_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.
nsCAutoString name(":");
name.Append(aName);
int ind = ::sqlite3_bind_parameter_index(mDBStatement,
PromiseFlatCString(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(PRUint32 *_columnCount)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
*_columnCount = mResultColumnCount;
return NS_OK;
}
NS_IMETHODIMP
Statement::GetColumnName(PRUint32 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,
PRUint32 *_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 (PRUint32 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
PR_LOG(gStorageLog, PR_LOG_DEBUG, ("Resetting statement: '%s'",
::sqlite3_sql(mDBStatement)));
checkAndLogStatementPerformance(mDBStatement);
#endif
mParamsArray = nsnull;
(void)sqlite3_reset(mDBStatement);
(void)sqlite3_clear_bindings(mDBStatement);
mExecuting = false;
return NS_OK;
}
NS_IMETHODIMP
Statement::BindParameters(mozIStorageBindingParamsArray *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;
PRBool ret;
nsresult rv = ExecuteStep(&ret);
nsresult rv2 = Reset();
return NS_FAILED(rv) ? rv : rv2;
}
NS_IMETHODIMP
Statement::ExecuteStep(PRBool *_moreResults)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
NS_TIME_FUNCTION_MIN_FMT(5, "mozIStorageStatement::ExecuteStep(%s) (0x%p)",
mDBConnection->getFilename().get(), mDBStatement);
// 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) {
PRInt32 srv;
(void)error->GetResult(&srv);
return convertResultCode(srv);
}
// We have bound, so now we can clear our array.
mParamsArray = nsnull;
}
int srv = stepStmt(mDBStatement);
#ifdef PR_LOGGING
if (srv != SQLITE_ROW && srv != SQLITE_DONE) {
nsCAutoString errStr;
(void)mDBConnection->GetLastErrorString(errStr);
PR_LOG(gStorageLog, PR_LOG_DEBUG,
("Statement::ExecuteStep error: %s", errStr.get()));
}
#endif
// SQLITE_ROW and SQLITE_DONE are non-errors
if (srv == SQLITE_ROW) {
// we got a row back
mExecuting = true;
*_moreResults = PR_TRUE;
return NS_OK;
}
else if (srv == SQLITE_DONE) {
// statement is done (no row returned)
mExecuting = false;
*_moreResults = PR_FALSE;
return NS_OK;
}
else if (srv == SQLITE_BUSY || srv == SQLITE_MISUSE) {
mExecuting = PR_FALSE;
}
else if (mExecuting) {
#ifdef PR_LOGGING
PR_LOG(gStorageLog, PR_LOG_ERROR,
("SQLite error after mExecuting was true!"));
#endif
mExecuting = PR_FALSE;
}
return convertResultCode(srv);
}
NS_IMETHODIMP
Statement::GetState(PRInt32 *_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;
}
NS_IMETHODIMP
Statement::GetColumnDecltype(PRUint32 aParamIndex,
nsACString &_declType)
{
if (!mDBStatement)
return NS_ERROR_NOT_INITIALIZED;
ENSURE_INDEX_VALUE(aParamIndex, mResultColumnCount);
_declType.Assign(::sqlite3_column_decltype(mDBStatement, aParamIndex));
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
//// mozIStorageValueArray (now part of mozIStorageStatement too)
NS_IMETHODIMP
Statement::GetNumEntries(PRUint32 *_length)
{
*_length = mResultColumnCount;
return NS_OK;
}
NS_IMETHODIMP
Statement::GetTypeOfIndex(PRUint32 aIndex,
PRInt32 *_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(PRUint32 aIndex,
PRInt32 *_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(PRUint32 aIndex,
PRInt64 *_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(PRUint32 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(PRUint32 aIndex,
nsACString &_value)
{
// Get type of Index will check aIndex for us, so we don't have to.
PRInt32 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.Truncate(0);
_value.SetIsVoid(PR_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(PRUint32 aIndex,
nsAString &_value)
{
// Get type of Index will check aIndex for us, so we don't have to.
PRInt32 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.Truncate(0);
_value.SetIsVoid(PR_TRUE);
} else {
const PRUnichar *value =
static_cast<const PRUnichar *>(::sqlite3_column_text16(mDBStatement,
aIndex));
_value.Assign(value, ::sqlite3_column_bytes16(mDBStatement, aIndex) / 2);
}
return NS_OK;
}
NS_IMETHODIMP
Statement::GetBlob(PRUint32 aIndex,
PRUint32 *_size,
PRUint8 **_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 = nsnull;
if (size) {
blob = nsMemory::Clone(::sqlite3_column_blob(mDBStatement, aIndex), size);
NS_ENSURE_TRUE(blob, NS_ERROR_OUT_OF_MEMORY);
}
*_blob = static_cast<PRUint8 *>(blob);
*_size = size;
return NS_OK;
}
NS_IMETHODIMP
Statement::GetSharedUTF8String(PRUint32 aIndex,
PRUint32 *_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(PRUint32 aIndex,
PRUint32 *_length,
const PRUnichar **_value)
{
if (_length)
*_length = ::sqlite3_column_bytes16(mDBStatement, aIndex);
*_value = static_cast<const PRUnichar *>(::sqlite3_column_text16(mDBStatement,
aIndex));
return NS_OK;
}
NS_IMETHODIMP
Statement::GetSharedBlob(PRUint32 aIndex,
PRUint32 *_size,
const PRUint8 **_blob)
{
*_size = ::sqlite3_column_bytes(mDBStatement, aIndex);
*_blob = static_cast<const PRUint8 *>(::sqlite3_column_blob(mDBStatement,
aIndex));
return NS_OK;
}
NS_IMETHODIMP
Statement::GetIsNull(PRUint32 aIndex,
PRBool *_isNull)
{
// Get type of Index will check aIndex for us, so we don't have to.
PRInt32 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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