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Commit 0cb0826b authored by Cody Zacharias's avatar Cody Zacharias Committed by GitHub
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Delete statement.cc

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graph/sqlite3/src/statement.cc deleted 100644 → 0
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#include <string.h>
#include <node.h>
#include <node_buffer.h>
#include <node_version.h>
#include "macros.h"
#include "database.h"
#include "statement.h"
using namespace node_sqlite3;
Nan::Persistent<FunctionTemplate> Statement::constructor_template;
NAN_MODULE_INIT(Statement::Init) {
Nan::HandleScope scope;
Local<FunctionTemplate> t = Nan::New<FunctionTemplate>(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
t->SetClassName(Nan::New("Statement").ToLocalChecked());
Nan::SetPrototypeMethod(t, "bind", Bind);
Nan::SetPrototypeMethod(t, "get", Get);
Nan::SetPrototypeMethod(t, "run", Run);
Nan::SetPrototypeMethod(t, "all", All);
Nan::SetPrototypeMethod(t, "each", Each);
Nan::SetPrototypeMethod(t, "reset", Reset);
Nan::SetPrototypeMethod(t, "finalize", Finalize);
constructor_template.Reset(t);
Nan::Set(target, Nan::New("Statement").ToLocalChecked(),
Nan::GetFunction(t).ToLocalChecked());
}
void Statement::Process() {
if (finalized && !queue.empty()) {
return CleanQueue();
}
while (prepared && !locked && !queue.empty()) {
Call* call = queue.front();
queue.pop();
call->callback(call->baton);
delete call;
}
}
void Statement::Schedule(Work_Callback callback, Baton* baton) {
if (finalized) {
queue.push(new Call(callback, baton));
CleanQueue();
}
else if (!prepared || locked) {
queue.push(new Call(callback, baton));
}
else {
callback(baton);
}
}
template <class T> void Statement::Error(T* baton) {
Nan::HandleScope scope;
Statement* stmt = baton->stmt;
// Fail hard on logic errors.
assert(stmt->status != 0);
EXCEPTION(Nan::New(stmt->message.c_str()).ToLocalChecked(), stmt->status, exception);
Local<Function> cb = Nan::New(baton->callback);
if (!cb.IsEmpty() && cb->IsFunction()) {
Local<Value> argv[] = { exception };
TRY_CATCH_CALL(stmt->handle(), cb, 1, argv);
}
else {
Local<Value> argv[] = { Nan::New("error").ToLocalChecked(), exception };
EMIT_EVENT(stmt->handle(), 2, argv);
}
}
// { Database db, String sql, Array params, Function callback }
NAN_METHOD(Statement::New) {
if (!info.IsConstructCall()) {
return Nan::ThrowTypeError("Use the new operator to create new Statement objects");
}
int length = info.Length();
if (length <= 0 || !Database::HasInstance(info[0])) {
return Nan::ThrowTypeError("Database object expected");
}
else if (length <= 1 || !info[1]->IsString()) {
return Nan::ThrowTypeError("SQL query expected");
}
else if (length > 2 && !info[2]->IsUndefined() && !info[2]->IsFunction()) {
return Nan::ThrowTypeError("Callback expected");
}
Database* db = Nan::ObjectWrap::Unwrap<Database>(info[0].As<Object>());
Local<String> sql = Local<String>::Cast(info[1]);
Nan::ForceSet(info.This(),Nan::New("sql").ToLocalChecked(), sql, ReadOnly);
Statement* stmt = new Statement(db);
stmt->Wrap(info.This());
PrepareBaton* baton = new PrepareBaton(db, Local<Function>::Cast(info[2]), stmt);
baton->sql = std::string(*Nan::Utf8String(sql));
db->Schedule(Work_BeginPrepare, baton);
info.GetReturnValue().Set(info.This());
}
void Statement::Work_BeginPrepare(Database::Baton* baton) {
assert(baton->db->open);
baton->db->pending++;
int status = uv_queue_work(uv_default_loop(),
&baton->request, Work_Prepare, (uv_after_work_cb)Work_AfterPrepare);
assert(status == 0);
}
void Statement::Work_Prepare(uv_work_t* req) {
STATEMENT_INIT(PrepareBaton);
// In case preparing fails, we use a mutex to make sure we get the associated
// error message.
sqlite3_mutex* mtx = sqlite3_db_mutex(baton->db->_handle);
sqlite3_mutex_enter(mtx);
stmt->status = sqlite3_prepare_v2(
baton->db->_handle,
baton->sql.c_str(),
baton->sql.size(),
&stmt->_handle,
NULL
);
if (stmt->status != SQLITE_OK) {
stmt->message = std::string(sqlite3_errmsg(baton->db->_handle));
stmt->_handle = NULL;
}
sqlite3_mutex_leave(mtx);
}
void Statement::Work_AfterPrepare(uv_work_t* req) {
Nan::HandleScope scope;
STATEMENT_INIT(PrepareBaton);
if (stmt->status != SQLITE_OK) {
Error(baton);
stmt->Finalize();
}
else {
stmt->prepared = true;
Local<Function> cb = Nan::New(baton->callback);
if (!cb.IsEmpty() && cb->IsFunction()) {
Local<Value> argv[] = { Nan::Null() };
TRY_CATCH_CALL(stmt->handle(), cb, 1, argv);
}
}
STATEMENT_END();
}
template <class T> Values::Field*
Statement::BindParameter(const Local<Value> source, T pos) {
if (source->IsString() || source->IsRegExp()) {
Nan::Utf8String val(source);
return new Values::Text(pos, val.length(), *val);
}
else if (source->IsInt32()) {
return new Values::Integer(pos, Nan::To<int32_t>(source).FromJust());
}
else if (source->IsNumber()) {
return new Values::Float(pos, Nan::To<double>(source).FromJust());
}
else if (source->IsBoolean()) {
return new Values::Integer(pos, Nan::To<bool>(source).FromJust() ? 1 : 0);
}
else if (source->IsNull()) {
return new Values::Null(pos);
}
else if (Buffer::HasInstance(source)) {
Local<Object> buffer = Nan::To<Object>(source).ToLocalChecked();
return new Values::Blob(pos, Buffer::Length(buffer), Buffer::Data(buffer));
}
else if (source->IsDate()) {
return new Values::Float(pos, Nan::To<double>(source).FromJust());
}
else {
return NULL;
}
}
template <class T> T* Statement::Bind(Nan::NAN_METHOD_ARGS_TYPE info, int start, int last) {
Nan::HandleScope scope;
if (last < 0) last = info.Length();
Local<Function> callback;
if (last > start && info[last - 1]->IsFunction()) {
callback = Local<Function>::Cast(info[last - 1]);
last--;
}
T* baton = new T(this, callback);
if (start < last) {
if (info[start]->IsArray()) {
Local<Array> array = Local<Array>::Cast(info[start]);
int length = array->Length();
// Note: bind parameters start with 1.
for (int i = 0, pos = 1; i < length; i++, pos++) {
baton->parameters.push_back(BindParameter(Nan::Get(array, i).ToLocalChecked(), pos));
}
}
else if (!info[start]->IsObject() || info[start]->IsRegExp() || info[start]->IsDate() || Buffer::HasInstance(info[start])) {
// Parameters directly in array.
// Note: bind parameters start with 1.
for (int i = start, pos = 1; i < last; i++, pos++) {
baton->parameters.push_back(BindParameter(info[i], pos));
}
}
else if (info[start]->IsObject()) {
Local<Object> object = Local<Object>::Cast(info[start]);
Local<Array> array = Nan::GetPropertyNames(object).ToLocalChecked();
int length = array->Length();
for (int i = 0; i < length; i++) {
Local<Value> name = Nan::Get(array, i).ToLocalChecked();
if (name->IsInt32()) {
baton->parameters.push_back(
BindParameter(Nan::Get(object, name).ToLocalChecked(), Nan::To<int32_t>(name).FromJust()));
}
else {
baton->parameters.push_back(BindParameter(Nan::Get(object, name).ToLocalChecked(),
*Nan::Utf8String(name)));
}
}
}
else {
return NULL;
}
}
return baton;
}
bool Statement::Bind(const Parameters & parameters) {
if (parameters.size() == 0) {
return true;
}
sqlite3_reset(_handle);
sqlite3_clear_bindings(_handle);
Parameters::const_iterator it = parameters.begin();
Parameters::const_iterator end = parameters.end();
for (; it < end; ++it) {
Values::Field* field = *it;
if (field != NULL) {
int pos;
if (field->index > 0) {
pos = field->index;
}
else {
pos = sqlite3_bind_parameter_index(_handle, field->name.c_str());
}
switch (field->type) {
case SQLITE_INTEGER: {
status = sqlite3_bind_int(_handle, pos,
((Values::Integer*)field)->value);
} break;
case SQLITE_FLOAT: {
status = sqlite3_bind_double(_handle, pos,
((Values::Float*)field)->value);
} break;
case SQLITE_TEXT: {
status = sqlite3_bind_text(_handle, pos,
((Values::Text*)field)->value.c_str(),
((Values::Text*)field)->value.size(), SQLITE_TRANSIENT);
} break;
case SQLITE_BLOB: {
status = sqlite3_bind_blob(_handle, pos,
((Values::Blob*)field)->value,
((Values::Blob*)field)->length, SQLITE_TRANSIENT);
} break;
case SQLITE_NULL: {
status = sqlite3_bind_null(_handle, pos);
} break;
}
if (status != SQLITE_OK) {
message = std::string(sqlite3_errmsg(db->_handle));
return false;
}
}
}
return true;
}
NAN_METHOD(Statement::Bind) {
Statement* stmt = Nan::ObjectWrap::Unwrap<Statement>(info.This());
Baton* baton = stmt->Bind<Baton>(info);
if (baton == NULL) {
return Nan::ThrowTypeError("Data type is not supported");
}
else {
stmt->Schedule(Work_BeginBind, baton);
info.GetReturnValue().Set(info.This());
}
}
void Statement::Work_BeginBind(Baton* baton) {
STATEMENT_BEGIN(Bind);
}
void Statement::Work_Bind(uv_work_t* req) {
STATEMENT_INIT(Baton);
sqlite3_mutex* mtx = sqlite3_db_mutex(stmt->db->_handle);
sqlite3_mutex_enter(mtx);
stmt->Bind(baton->parameters);
sqlite3_mutex_leave(mtx);
}
void Statement::Work_AfterBind(uv_work_t* req) {
Nan::HandleScope scope;
STATEMENT_INIT(Baton);
if (stmt->status != SQLITE_OK) {
Error(baton);
}
else {
// Fire callbacks.
Local<Function> cb = Nan::New(baton->callback);
if (!cb.IsEmpty() && cb->IsFunction()) {
Local<Value> argv[] = { Nan::Null() };
TRY_CATCH_CALL(stmt->handle(), cb, 1, argv);
}
}
STATEMENT_END();
}
NAN_METHOD(Statement::Get) {
Statement* stmt = Nan::ObjectWrap::Unwrap<Statement>(info.This());
Baton* baton = stmt->Bind<RowBaton>(info);
if (baton == NULL) {
return Nan::ThrowError("Data type is not supported");
}
else {
stmt->Schedule(Work_BeginGet, baton);
info.GetReturnValue().Set(info.This());
}
}
void Statement::Work_BeginGet(Baton* baton) {
STATEMENT_BEGIN(Get);
}
void Statement::Work_Get(uv_work_t* req) {
STATEMENT_INIT(RowBaton);
if (stmt->status != SQLITE_DONE || baton->parameters.size()) {
sqlite3_mutex* mtx = sqlite3_db_mutex(stmt->db->_handle);
sqlite3_mutex_enter(mtx);
if (stmt->Bind(baton->parameters)) {
stmt->status = sqlite3_step(stmt->_handle);
if (!(stmt->status == SQLITE_ROW || stmt->status == SQLITE_DONE)) {
stmt->message = std::string(sqlite3_errmsg(stmt->db->_handle));
}
}
sqlite3_mutex_leave(mtx);
if (stmt->status == SQLITE_ROW) {
// Acquire one result row before returning.
GetRow(&baton->row, stmt->_handle);
}
}
}
void Statement::Work_AfterGet(uv_work_t* req) {
Nan::HandleScope scope;
STATEMENT_INIT(RowBaton);
if (stmt->status != SQLITE_ROW && stmt->status != SQLITE_DONE) {
Error(baton);
}
else {
// Fire callbacks.
Local<Function> cb = Nan::New(baton->callback);
if (!cb.IsEmpty() && cb->IsFunction()) {
if (stmt->status == SQLITE_ROW) {
// Create the result array from the data we acquired.
Local<Value> argv[] = { Nan::Null(), RowToJS(&baton->row) };
TRY_CATCH_CALL(stmt->handle(), cb, 2, argv);
}
else {
Local<Value> argv[] = { Nan::Null() };
TRY_CATCH_CALL(stmt->handle(), cb, 1, argv);
}
}
}
STATEMENT_END();
}
NAN_METHOD(Statement::Run) {
Statement* stmt = Nan::ObjectWrap::Unwrap<Statement>(info.This());
Baton* baton = stmt->Bind<RunBaton>(info);
if (baton == NULL) {
return Nan::ThrowError("Data type is not supported");
}
else {
stmt->Schedule(Work_BeginRun, baton);
info.GetReturnValue().Set(info.This());
}
}
void Statement::Work_BeginRun(Baton* baton) {
STATEMENT_BEGIN(Run);
}
void Statement::Work_Run(uv_work_t* req) {
STATEMENT_INIT(RunBaton);
sqlite3_mutex* mtx = sqlite3_db_mutex(stmt->db->_handle);
sqlite3_mutex_enter(mtx);
// Make sure that we also reset when there are no parameters.
if (!baton->parameters.size()) {
sqlite3_reset(stmt->_handle);
}
if (stmt->Bind(baton->parameters)) {
stmt->status = sqlite3_step(stmt->_handle);
if (!(stmt->status == SQLITE_ROW || stmt->status == SQLITE_DONE)) {
stmt->message = std::string(sqlite3_errmsg(stmt->db->_handle));
}
else {
baton->inserted_id = sqlite3_last_insert_rowid(stmt->db->_handle);
baton->changes = sqlite3_changes(stmt->db->_handle);
}
}
sqlite3_mutex_leave(mtx);
}
void Statement::Work_AfterRun(uv_work_t* req) {
Nan::HandleScope scope;
STATEMENT_INIT(RunBaton);
if (stmt->status != SQLITE_ROW && stmt->status != SQLITE_DONE) {
Error(baton);
}
else {
// Fire callbacks.
Local<Function> cb = Nan::New(baton->callback);
if (!cb.IsEmpty() && cb->IsFunction()) {
Nan::Set(stmt->handle(), Nan::New("lastID").ToLocalChecked(), Nan::New<Number>(baton->inserted_id));
Nan::Set(stmt->handle(), Nan::New("changes").ToLocalChecked(), Nan::New(baton->changes));
Local<Value> argv[] = { Nan::Null() };
TRY_CATCH_CALL(stmt->handle(), cb, 1, argv);
}
}
STATEMENT_END();
}
NAN_METHOD(Statement::All) {
Statement* stmt = Nan::ObjectWrap::Unwrap<Statement>(info.This());
Baton* baton = stmt->Bind<RowsBaton>(info);
if (baton == NULL) {
return Nan::ThrowError("Data type is not supported");
}
else {
stmt->Schedule(Work_BeginAll, baton);
info.GetReturnValue().Set(info.This());
}
}
void Statement::Work_BeginAll(Baton* baton) {
STATEMENT_BEGIN(All);
}
void Statement::Work_All(uv_work_t* req) {
STATEMENT_INIT(RowsBaton);
sqlite3_mutex* mtx = sqlite3_db_mutex(stmt->db->_handle);
sqlite3_mutex_enter(mtx);
// Make sure that we also reset when there are no parameters.
if (!baton->parameters.size()) {
sqlite3_reset(stmt->_handle);
}
if (stmt->Bind(baton->parameters)) {
while ((stmt->status = sqlite3_step(stmt->_handle)) == SQLITE_ROW) {
Row* row = new Row();
GetRow(row, stmt->_handle);
baton->rows.push_back(row);
}
if (stmt->status != SQLITE_DONE) {
stmt->message = std::string(sqlite3_errmsg(stmt->db->_handle));
}
}
sqlite3_mutex_leave(mtx);
}
void Statement::Work_AfterAll(uv_work_t* req) {
Nan::HandleScope scope;
STATEMENT_INIT(RowsBaton);
if (stmt->status != SQLITE_DONE) {
Error(baton);
}
else {
// Fire callbacks.
Local<Function> cb = Nan::New(baton->callback);
if (!cb.IsEmpty() && cb->IsFunction()) {
if (baton->rows.size()) {
// Create the result array from the data we acquired.
Local<Array> result(Nan::New<Array>(baton->rows.size()));
Rows::const_iterator it = baton->rows.begin();
Rows::const_iterator end = baton->rows.end();
for (int i = 0; it < end; ++it, i++) {
Nan::Set(result, i, RowToJS(*it));
delete *it;
}
Local<Value> argv[] = { Nan::Null(), result };
TRY_CATCH_CALL(stmt->handle(), cb, 2, argv);
}
else {
// There were no result rows.
Local<Value> argv[] = {
Nan::Null(),
Nan::New<Array>(0)
};
TRY_CATCH_CALL(stmt->handle(), cb, 2, argv);
}
}
}
STATEMENT_END();
}
NAN_METHOD(Statement::Each) {
Statement* stmt = Nan::ObjectWrap::Unwrap<Statement>(info.This());
int last = info.Length();
Local<Function> completed;
if (last >= 2 && info[last - 1]->IsFunction() && info[last - 2]->IsFunction()) {
completed = Local<Function>::Cast(info[--last]);
}
EachBaton* baton = stmt->Bind<EachBaton>(info, 0, last);
if (baton == NULL) {
return Nan::ThrowError("Data type is not supported");
}
else {
baton->completed.Reset(completed);
stmt->Schedule(Work_BeginEach, baton);
info.GetReturnValue().Set(info.This());
}
}
void Statement::Work_BeginEach(Baton* baton) {
// Only create the Async object when we're actually going into
// the event loop. This prevents dangling events.
EachBaton* each_baton = static_cast<EachBaton*>(baton);
each_baton->async = new Async(each_baton->stmt, reinterpret_cast<uv_async_cb>(AsyncEach));
each_baton->async->item_cb.Reset(each_baton->callback);
each_baton->async->completed_cb.Reset(each_baton->completed);
STATEMENT_BEGIN(Each);
}
void Statement::Work_Each(uv_work_t* req) {
STATEMENT_INIT(EachBaton);
Async* async = baton->async;
sqlite3_mutex* mtx = sqlite3_db_mutex(stmt->db->_handle);
int retrieved = 0;
// Make sure that we also reset when there are no parameters.
if (!baton->parameters.size()) {
sqlite3_reset(stmt->_handle);
}
if (stmt->Bind(baton->parameters)) {
while (true) {
sqlite3_mutex_enter(mtx);
stmt->status = sqlite3_step(stmt->_handle);
if (stmt->status == SQLITE_ROW) {
sqlite3_mutex_leave(mtx);
Row* row = new Row();
GetRow(row, stmt->_handle);
NODE_SQLITE3_MUTEX_LOCK(&async->mutex)
async->data.push_back(row);
retrieved++;
NODE_SQLITE3_MUTEX_UNLOCK(&async->mutex)
uv_async_send(&async->watcher);
}
else {
if (stmt->status != SQLITE_DONE) {
stmt->message = std::string(sqlite3_errmsg(stmt->db->_handle));
}
sqlite3_mutex_leave(mtx);
break;
}
}
}
async->completed = true;
uv_async_send(&async->watcher);
}
void Statement::CloseCallback(uv_handle_t* handle) {
assert(handle != NULL);
assert(handle->data != NULL);
Async* async = static_cast<Async*>(handle->data);
delete async;
}
void Statement::AsyncEach(uv_async_t* handle, int status) {
Nan::HandleScope scope;
Async* async = static_cast<Async*>(handle->data);
while (true) {
// Get the contents out of the data cache for us to process in the JS callback.
Rows rows;
NODE_SQLITE3_MUTEX_LOCK(&async->mutex)
rows.swap(async->data);
NODE_SQLITE3_MUTEX_UNLOCK(&async->mutex)
if (rows.empty()) {
break;
}
Local<Function> cb = Nan::New(async->item_cb);
if (!cb.IsEmpty() && cb->IsFunction()) {
Local<Value> argv[2];
argv[0] = Nan::Null();
Rows::const_iterator it = rows.begin();
Rows::const_iterator end = rows.end();
for (int i = 0; it < end; ++it, i++) {
argv[1] = RowToJS(*it);
async->retrieved++;
TRY_CATCH_CALL(async->stmt->handle(), cb, 2, argv);
delete *it;
}
}
}
Local<Function> cb = Nan::New(async->completed_cb);
if (async->completed) {
if (!cb.IsEmpty() &&
cb->IsFunction()) {
Local<Value> argv[] = {
Nan::Null(),
Nan::New(async->retrieved)
};
TRY_CATCH_CALL(async->stmt->handle(), cb, 2, argv);
}
uv_close(reinterpret_cast<uv_handle_t*>(handle), CloseCallback);
}
}
void Statement::Work_AfterEach(uv_work_t* req) {
Nan::HandleScope scope;
STATEMENT_INIT(EachBaton);
if (stmt->status != SQLITE_DONE) {
Error(baton);
}
STATEMENT_END();
}
NAN_METHOD(Statement::Reset) {
Statement* stmt = Nan::ObjectWrap::Unwrap<Statement>(info.This());
OPTIONAL_ARGUMENT_FUNCTION(0, callback);
Baton* baton = new Baton(stmt, callback);
stmt->Schedule(Work_BeginReset, baton);
info.GetReturnValue().Set(info.This());
}
void Statement::Work_BeginReset(Baton* baton) {
STATEMENT_BEGIN(Reset);
}
void Statement::Work_Reset(uv_work_t* req) {
STATEMENT_INIT(Baton);
sqlite3_reset(stmt->_handle);
stmt->status = SQLITE_OK;
}
void Statement::Work_AfterReset(uv_work_t* req) {
Nan::HandleScope scope;
STATEMENT_INIT(Baton);
// Fire callbacks.
Local<Function> cb = Nan::New(baton->callback);
if (!cb.IsEmpty() && cb->IsFunction()) {
Local<Value> argv[] = { Nan::Null() };
TRY_CATCH_CALL(stmt->handle(), cb, 1, argv);
}
STATEMENT_END();
}
Local<Object> Statement::RowToJS(Row* row) {
Nan::EscapableHandleScope scope;
Local<Object> result = Nan::New<Object>();
Row::const_iterator it = row->begin();
Row::const_iterator end = row->end();
for (int i = 0; it < end; ++it, i++) {
Values::Field* field = *it;
Local<Value> value;
switch (field->type) {
case SQLITE_INTEGER: {
value = Nan::New<Number>(((Values::Integer*)field)->value);
} break;
case SQLITE_FLOAT: {
value = Nan::New<Number>(((Values::Float*)field)->value);
} break;
case SQLITE_TEXT: {
value = Nan::New<String>(((Values::Text*)field)->value.c_str(), ((Values::Text*)field)->value.size()).ToLocalChecked();
} break;
case SQLITE_BLOB: {
value = Nan::CopyBuffer(((Values::Blob*)field)->value, ((Values::Blob*)field)->length).ToLocalChecked();
} break;
case SQLITE_NULL: {
value = Nan::Null();
} break;
}
Nan::Set(result, Nan::New(field->name.c_str()).ToLocalChecked(), value);
DELETE_FIELD(field);
}
return scope.Escape(result);
}
void Statement::GetRow(Row* row, sqlite3_stmt* stmt) {
int rows = sqlite3_column_count(stmt);
for (int i = 0; i < rows; i++) {
int type = sqlite3_column_type(stmt, i);
const char* name = sqlite3_column_name(stmt, i);
switch (type) {
case SQLITE_INTEGER: {
row->push_back(new Values::Integer(name, sqlite3_column_int64(stmt, i)));
} break;
case SQLITE_FLOAT: {
row->push_back(new Values::Float(name, sqlite3_column_double(stmt, i)));
} break;
case SQLITE_TEXT: {
const char* text = (const char*)sqlite3_column_text(stmt, i);
int length = sqlite3_column_bytes(stmt, i);
row->push_back(new Values::Text(name, length, text));
} break;
case SQLITE_BLOB: {
const void* blob = sqlite3_column_blob(stmt, i);
int length = sqlite3_column_bytes(stmt, i);
row->push_back(new Values::Blob(name, length, blob));
} break;
case SQLITE_NULL: {
row->push_back(new Values::Null(name));
} break;
default:
assert(false);
}
}
}
NAN_METHOD(Statement::Finalize) {
Statement* stmt = Nan::ObjectWrap::Unwrap<Statement>(info.This());
OPTIONAL_ARGUMENT_FUNCTION(0, callback);
Baton* baton = new Baton(stmt, callback);
stmt->Schedule(Finalize, baton);
info.GetReturnValue().Set(stmt->db->handle());
}
void Statement::Finalize(Baton* baton) {
Nan::HandleScope scope;
baton->stmt->Finalize();
// Fire callback in case there was one.
Local<Function> cb = Nan::New(baton->callback);
if (!cb.IsEmpty() && cb->IsFunction()) {
TRY_CATCH_CALL(baton->stmt->handle(), cb, 0, NULL);
}
delete baton;
}
void Statement::Finalize() {
assert(!finalized);
finalized = true;
CleanQueue();
// Finalize returns the status code of the last operation. We already fired
// error events in case those failed.
sqlite3_finalize(_handle);
_handle = NULL;
db->Unref();
}
void Statement::CleanQueue() {
Nan::HandleScope scope;
if (prepared && !queue.empty()) {
// This statement has already been prepared and is now finalized.
// Fire error for all remaining items in the queue.
EXCEPTION(Nan::New<String>("Statement is already finalized").ToLocalChecked(), SQLITE_MISUSE, exception);
Local<Value> argv[] = { exception };
bool called = false;
// Clear out the queue so that this object can get GC'ed.
while (!queue.empty()) {
Call* call = queue.front();
queue.pop();
Local<Function> cb = Nan::New(call->baton->callback);
if (prepared && !cb.IsEmpty() &&
cb->IsFunction()) {
TRY_CATCH_CALL(handle(), cb, 1, argv);
called = true;
}
// We don't call the actual callback, so we have to make sure that
// the baton gets destroyed.
delete call->baton;
delete call;
}
// When we couldn't call a callback function, emit an error on the
// Statement object.
if (!called) {
Local<Value> info[] = { Nan::New("error").ToLocalChecked(), exception };
EMIT_EVENT(handle(), 2, info);
}
}
else while (!queue.empty()) {
// Just delete all items in the queue; we already fired an event when
// preparing the statement failed.
Call* call = queue.front();
queue.pop();
// We don't call the actual callback, so we have to make sure that
// the baton gets destroyed.
delete call->baton;
delete call;
}
}
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