/
WrappedVsam.cpp
1248 lines (1149 loc) · 44 KB
/
WrappedVsam.cpp
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/*
* Licensed Materials - Property of IBM
* (C) Copyright IBM Corp. 2020, 2022. All Rights Reserved.
* US Government Users Restricted Rights - Use, duplication or disclosure
* restricted by GSA ADP Schedule Contract with IBM Corp.
*/
#include <assert.h>
#include <stdio.h>
#include <unistd.h>
#include <sstream>
#include "WrappedVsam.h"
#include "VsamThread.h"
Napi::FunctionReference WrappedVsam::constructor_;
static void throwError(const Napi::CallbackInfo &info, int errArgNum,
CbFirstArgType firstArgType, bool isTypeErr,
const char *fmt, ...) {
char msg[1024];
va_list args;
va_start(args, fmt);
vsnprintf(msg, sizeof(msg), fmt, args);
va_end(args);
#ifdef DEBUG
fprintf(stderr, "%s\n", msg);
#endif
Napi::Env env = info.Env();
if (errArgNum >= 0 && firstArgType != ARG0_TYPE_NONE) {
for (size_t i = 0; i < info.Length(); i++) {
if (!info[i].IsFunction())
continue;
Napi::Function cb = info[i].As<Napi::Function>();
if (errArgNum == 0) {
assert(firstArgType == ARG0_TYPE_ERR);
cb.Call(env.Global(), {Napi::String::New(env, msg)});
} else if (errArgNum == 1) {
if (firstArgType == ARG0_TYPE_NULL)
cb.Call(env.Global(), {env.Null(), Napi::String::New(env, msg)});
else if (firstArgType == ARG0_TYPE_0)
cb.Call(env.Global(),
{Napi::Number::New(env, 0), Napi::String::New(env, msg)});
else
assert(0);
} else
assert(0); // currently errArgNum is only 0 or 1
return;
}
}
if (isTypeErr)
Napi::TypeError::New(env, msg).ThrowAsJavaScriptException();
else
Napi::Error::New(env, msg).ThrowAsJavaScriptException();
}
bool WrappedVsam::errorIfNotOpen(const Napi::CallbackInfo &info, int errArgNum,
CbFirstArgType firstArgType,
const char *pApiName) {
if (pVsamFile_ == nullptr) {
Napi::HandleScope scope(info.Env());
throwError(info, errArgNum, firstArgType, false,
"%s error: VSAM dataset is not open.", pApiName);
return true;
}
return false;
}
void WrappedVsam::DefaultComplete(uv_work_t *req, int status) {
UvWorkData *pdata = (UvWorkData *)(req->data);
delete req;
if (status == UV_ECANCELED) {
delete pdata;
return;
}
Napi::HandleScope scope(pdata->env_);
DCHECK(pdata->cb_ != nullptr && pdata->env_ != nullptr);
if (pdata->rc_ != 0)
pdata->cb_.Call(pdata->env_.Global(),
{Napi::String::New(pdata->env_, pdata->errmsg_)});
else
pdata->cb_.Call(pdata->env_.Global(), {pdata->env_.Null()});
delete pdata;
}
void WrappedVsam::FindUpdateComplete(uv_work_t *req, int status) {
UvWorkData *pdata = (UvWorkData *)(req->data);
delete req;
if (status == UV_ECANCELED) {
delete pdata;
return;
}
Napi::HandleScope scope(pdata->env_);
DCHECK(pdata->cb_ != nullptr && pdata->env_ != nullptr);
if (pdata->rc_ != 0)
// even on error, 1 or more records may have been updated before the error
pdata->cb_.Call(pdata->env_.Global(),
{Napi::Number::New(pdata->env_, pdata->count_),
Napi::String::New(pdata->env_, pdata->errmsg_)});
else
pdata->cb_.Call(
pdata->env_.Global(),
{Napi::Number::New(pdata->env_, pdata->count_), pdata->env_.Null()});
delete pdata;
}
void WrappedVsam::FindDeleteComplete(uv_work_t *req, int status) {
FindUpdateComplete(req, status);
}
void WrappedVsam::DeleteComplete(uv_work_t *req, int status) {
DefaultComplete(req, status);
}
void WrappedVsam::WriteComplete(uv_work_t *req, int status) {
DefaultComplete(req, status);
}
void WrappedVsam::UpdateComplete(uv_work_t *req, int status) {
DefaultComplete(req, status);
}
void WrappedVsam::DeallocComplete(uv_work_t *req, int status) {
DefaultComplete(req, status);
}
Napi::Value WrappedVsam::createRecordObject(UvWorkData *pdata) {
if (pdata->recbuf_ == nullptr)
return pdata->env_.Null();
Napi::Object record = Napi::Object::New(pdata->env_);
const char *recbuf = pdata->recbuf_;
VsamFile *obj = pdata->pVsamFile_;
DCHECK(obj != nullptr);
std::vector<LayoutItem> &layout = obj->getLayout();
for (auto i = layout.begin(); i != layout.end(); ++i) {
if (i->type == LayoutItem::STRING) {
std::string str(recbuf, i->maxLength + 1);
str[i->maxLength] = 0;
record.Set(i->name, Napi::String::New(pdata->env_, str.c_str()));
} else if (i->type == LayoutItem::HEXADECIMAL) {
char hexstr[(i->maxLength * 2) + 1];
VsamFile::bufferToHexstr(hexstr, sizeof(hexstr), recbuf, i->maxLength);
record.Set(i->name, Napi::String::New(pdata->env_, hexstr));
}
recbuf += i->maxLength;
}
return record;
}
void WrappedVsam::ReadComplete(uv_work_t *req, int status) {
UvWorkData *pdata = (UvWorkData *)(req->data);
delete req;
if (status == UV_ECANCELED) {
delete pdata;
return;
}
Napi::HandleScope scope(pdata->env_);
DCHECK(pdata->cb_ != nullptr && pdata->env_ != nullptr);
if (pdata->rc_ != 0) {
pdata->cb_.Call(
pdata->env_.Global(),
{pdata->env_.Null(), Napi::String::New(pdata->env_, pdata->errmsg_)});
delete pdata;
return;
}
if (pdata->recbuf_ == nullptr) {
pdata->cb_.Call(pdata->env_.Global(),
{pdata->env_.Null(), pdata->env_.Null()});
delete pdata;
return;
}
Napi::Value record = createRecordObject(pdata);
pdata->cb_.Call(pdata->env_.Global(), {record, pdata->env_.Null()});
delete pdata;
}
void WrappedVsam::FindExecute(uv_work_t *req) {
UvWorkData *pdata = (UvWorkData *)(req->data);
VsamFile *obj = pdata->pVsamFile_;
DCHECK(obj != nullptr);
obj->routeToVsamThread(MSG_FIND, &VsamFile::FindExecute, pdata);
}
void WrappedVsam::FindUpdateExecute(uv_work_t *req) {
UvWorkData *pdata = (UvWorkData *)(req->data);
VsamFile *obj = pdata->pVsamFile_;
DCHECK(obj != nullptr);
obj->routeToVsamThread(MSG_FIND_UPDATE, &VsamFile::FindUpdateExecute, pdata);
}
void WrappedVsam::FindDeleteExecute(uv_work_t *req) {
UvWorkData *pdata = (UvWorkData *)(req->data);
VsamFile *obj = pdata->pVsamFile_;
DCHECK(obj != nullptr);
obj->routeToVsamThread(MSG_FIND_DELETE, &VsamFile::FindDeleteExecute, pdata);
}
void WrappedVsam::ReadExecute(uv_work_t *req) {
UvWorkData *pdata = (UvWorkData *)(req->data);
VsamFile *obj = pdata->pVsamFile_;
DCHECK(obj != nullptr);
obj->routeToVsamThread(MSG_READ, &VsamFile::ReadExecute, pdata);
}
void WrappedVsam::DeleteExecute(uv_work_t *req) {
UvWorkData *pdata = (UvWorkData *)(req->data);
VsamFile *obj = pdata->pVsamFile_;
DCHECK(obj != nullptr);
obj->routeToVsamThread(MSG_DELETE, &VsamFile::DeleteExecute, pdata);
}
void WrappedVsam::WriteExecute(uv_work_t *req) {
UvWorkData *pdata = (UvWorkData *)(req->data);
VsamFile *obj = pdata->pVsamFile_;
DCHECK(obj != nullptr);
obj->routeToVsamThread(MSG_WRITE, &VsamFile::WriteExecute, pdata);
}
void WrappedVsam::UpdateExecute(uv_work_t *req) {
UvWorkData *pdata = (UvWorkData *)(req->data);
VsamFile *obj = pdata->pVsamFile_;
DCHECK(obj != nullptr);
obj->routeToVsamThread(MSG_UPDATE, &VsamFile::UpdateExecute, pdata);
}
void WrappedVsam::DeallocExecute(uv_work_t *req) {
UvWorkData *pdata = (UvWorkData *)(req->data);
DCHECK(pdata->pVsamFile_ == nullptr);
DCHECK(pdata->path_.length() > 0);
VsamFile::DeallocExecute(pdata);
}
WrappedVsam::WrappedVsam(const Napi::CallbackInfo &info)
: Napi::ObjectWrap<WrappedVsam>(info) {
if (info.Length() != 6) {
Napi::HandleScope scope(info.Env());
throwError(
info, -1, ARG0_TYPE_NONE, true, //-1 throws an exception, not callback
"Internal Error: wrong number of arguments to WrappedVsam constructor: "
"got %d, expected 6.",
info.Length());
return;
}
path_ = static_cast<std::string>(info[0].As<Napi::String>());
Napi::Buffer<std::vector<LayoutItem>> b =
info[1].As<Napi::Buffer<std::vector<LayoutItem>>>();
std::vector<LayoutItem> layout =
*(static_cast<std::vector<LayoutItem> *>(b.Data()));
int key_i = static_cast<int>(info[2].As<Napi::Number>().Int32Value());
int keypos = static_cast<int>(info[3].As<Napi::Number>().Int32Value());
const std::string &omode =
static_cast<std::string>(info[4].As<Napi::String>());
bool alloc(static_cast<bool>(info[5].As<Napi::Boolean>()));
pVsamFile_ = new VsamFile(path_, layout, key_i, keypos, omode);
#if defined(DEBUG) || defined(XDEBUG)
fprintf(stderr, "WrappedVsam this=%p created pVsamFile_=%p\n", this,
pVsamFile_);
#endif
pVsamFile_->routeToVsamThread(MSG_OPEN,
alloc ? &VsamFile::alloc : &VsamFile::open);
}
WrappedVsam::~WrappedVsam() {
#if defined(DEBUG) || defined(XDEBUG)
fprintf(stderr, "~WrappedVsam this=%p, deleteVsamFileObj...\n", this);
#endif
deleteVsamFileObj();
}
void WrappedVsam::deleteVsamFileObj() {
if (pVsamFile_ == nullptr) {
#ifdef DEBUG
fprintf(stderr,
"deleteVsamFileObj pVsamFile_ already null, nothing to do.\n");
#endif
return;
}
#ifdef DEBUG
fprintf(stderr, "deleteVsamFileObj calling vsamExitThread...\n");
#endif
pVsamFile_->exitVsamThread();
#ifdef DEBUG
fprintf(stderr, "deleteVsamFileObj delete pVsamFile_ %p...\n", pVsamFile_);
#endif
delete pVsamFile_;
#ifdef DEBUG
fprintf(stderr, "deleteVsamFileObj done...\n");
#endif
pVsamFile_ = nullptr;
}
Napi::Object WrappedVsam::Init(Napi::Env env, Napi::Object exports) {
Napi::HandleScope scope(env);
Napi::Function func =
DefineClass(env, "WrappedVsam",
{InstanceMethod("read", &WrappedVsam::Read),
InstanceMethod("readSync", &WrappedVsam::ReadSync),
InstanceMethod("find", &WrappedVsam::FindEq),
InstanceMethod("findSync", &WrappedVsam::FindEqSync),
InstanceMethod("findeq", &WrappedVsam::FindEq),
InstanceMethod("findeqSync", &WrappedVsam::FindEqSync),
InstanceMethod("findge", &WrappedVsam::FindGe),
InstanceMethod("findgeSync", &WrappedVsam::FindGeSync),
InstanceMethod("findfirst", &WrappedVsam::FindFirst),
InstanceMethod("findfirstSync", &WrappedVsam::FindFirstSync),
InstanceMethod("findlast", &WrappedVsam::FindLast),
InstanceMethod("findlastSync", &WrappedVsam::FindLastSync),
InstanceMethod("update", &WrappedVsam::Update),
InstanceMethod("updateSync", &WrappedVsam::UpdateSync),
InstanceMethod("write", &WrappedVsam::Write),
InstanceMethod("writeSync", &WrappedVsam::WriteSync),
InstanceMethod("delete", &WrappedVsam::Delete),
InstanceMethod("deleteSync", &WrappedVsam::DeleteSync),
InstanceMethod("close", &WrappedVsam::Close),
InstanceMethod("dealloc", &WrappedVsam::Dealloc)});
constructor_ = Napi::Persistent(func);
constructor_.SuppressDestruct();
exports.Set("WrappedVsam", func);
return exports;
}
// static
Napi::Object WrappedVsam::Construct(const Napi::CallbackInfo &info,
bool alloc) {
Napi::Env env = info.Env();
Napi::EscapableHandleScope scope(env);
const char *pApiName = alloc ? "allocSync" : "openSync";
std::string path(static_cast<std::string>(info[0].As<Napi::String>()));
const Napi::Object &schema = info[1].ToObject();
const std::string &mode =
info.Length() == 2
? "rb+,type=record"
: (static_cast<std::string>(info[2].As<Napi::String>()));
const Napi::Array &properties = schema.GetPropertyNames();
std::vector<LayoutItem> layout;
int key_i = 0; // for its data type - default to first field if no "key" found
int curpos = 0, keypos = 0;
for (size_t i = 0; i < properties.Length(); ++i) {
std::string name(static_cast<std::string>(
Napi::String(env, properties.Get(i).ToString())));
const Napi::Object &item = schema.Get(properties.Get(i)).As<Napi::Object>();
if (item.IsEmpty()) {
throwError(info, -1, ARG0_TYPE_NONE, false,
"%s error in JSON: item %d is empty.", pApiName, i + 1);
return env.Null().ToObject();
}
int minLength = 0; // minLength is optional, default 0 unless it's a key
if (item.Has("minLength")) {
const Napi::Value &vminLength = item.Get("minLength");
if (!vminLength.IsEmpty() && !vminLength.IsNumber()) {
throwError(
info, -1, ARG0_TYPE_NONE, true,
"%s error in JSON (item %d): minLength value must be numeric.",
pApiName, i + 1);
return env.Null().ToObject();
} else if (!vminLength.IsEmpty()) {
minLength = vminLength.ToNumber().Int32Value();
if (minLength < 0) {
throwError(
info, -1, ARG0_TYPE_NONE, true,
"%s error in JSON (item %d): minLength value cannot be negative.",
pApiName, i + 1);
return env.Null().ToObject();
}
}
}
int maxLength = 0;
if (!item.Has("maxLength")) {
throwError(info, -1, ARG0_TYPE_NONE, true,
"%s error in JSON (item %d): maxLength must be specified.",
pApiName, i + 1);
return env.Null().ToObject();
}
const Napi::Value &vmaxLength = item.Get("maxLength");
if (!vmaxLength.IsNumber()) {
throwError(info, -1, ARG0_TYPE_NONE, true,
"%s error in JSON (item %d): maxLength must be numeric.",
pApiName, i + 1);
return env.Null().ToObject();
} else {
maxLength = vmaxLength.ToNumber().Int32Value();
if (maxLength <= 0) {
throwError(info, -1, ARG0_TYPE_NONE, true,
"%s error in JSON (item %d): maxLength value must be "
"greater than 0.",
pApiName, i + 1);
return env.Null().ToObject();
}
}
if (minLength > maxLength) {
throwError(info, -1, ARG0_TYPE_NONE, true,
"%s error in JSON (item %d): minLength cannot be greater than "
"maxLength.",
pApiName, i + 1);
return env.Null().ToObject();
}
if (item.Has("type")) {
const Napi::Value &jtype = item.Get("type");
const std::string &stype(
static_cast<std::string>(jtype.As<Napi::String>()));
if (!strcmp(stype.c_str(), "string")) {
layout.push_back(
LayoutItem(name, minLength, maxLength, LayoutItem::STRING));
} else if (!strcmp(stype.c_str(), "hexadecimal")) {
layout.push_back(
LayoutItem(name, minLength, maxLength, LayoutItem::HEXADECIMAL));
} else {
throwError(info, -1, ARG0_TYPE_NONE, true,
"%s error in JSON (item %d): \"type\" must be either "
"\"string\" or \"hexadecimal\"",
pApiName, i + 1);
return env.Null().ToObject();
}
if (!strcmp(name.c_str(), "key")) {
key_i = i;
keypos = curpos;
}
} else {
throwError(
info, -1, ARG0_TYPE_NONE, true,
"%s error in JSON (item %d): \"type\" must be specified (string "
"or hexadecimal)",
pApiName, i + 1);
return env.Null().ToObject();
}
curpos += maxLength;
}
const Napi::Object &item =
schema.Get(properties.Get(key_i)).As<Napi::Object>();
DCHECK(!item.IsEmpty());
if (item.Has("minLength")) {
const Napi::Value &vminLength =
item.Get(Napi::String::New(env, "minLength"));
if (vminLength.ToNumber().Int32Value() == 0) {
throwError(info, -1, ARG0_TYPE_NONE, true,
"%s error in JSON (item %d): minLength of key '%s' must be "
"greater than 0.",
pApiName, key_i + 1, layout[key_i].name.c_str());
return env.Null().ToObject();
}
} else
layout[key_i].minLength = 1;
Napi::Object obj = constructor_.New(
{Napi::String::New(env, path),
Napi::Buffer<std::vector<LayoutItem>>::Copy(env, &layout, layout.size()),
Napi::Number::New(env, key_i), Napi::Number::New(env, keypos),
Napi::String::New(env, mode), Napi::Boolean::New(env, alloc)});
std::string errmsg;
WrappedVsam *p = Napi::ObjectWrap<WrappedVsam>::Unwrap(obj);
if (!p || !p->pVsamFile_ || p->pVsamFile_->getLastError(errmsg) ||
!p->pVsamFile_->isDatasetOpen()) {
const char *perr = errmsg.c_str();
throwError(info, -1, ARG0_TYPE_NONE, false,
perr && *perr ? perr
: "%s error: failed to construct VsamFile object.",
pApiName);
if (p && p->pVsamFile_) {
#ifdef DEBUG
fprintf(stderr, "Construct deleteVsamFileObj...\n");
#endif
p->deleteVsamFileObj();
}
}
return scope.Escape(napi_value(obj)).ToObject();
}
// static
Napi::Object WrappedVsam::AllocSync(const Napi::CallbackInfo &info) {
if (info.Length() != 2 || !info[0].IsString() || !info[1].IsObject()) {
Napi::HandleScope scope(info.Env());
throwError(info, -1, ARG0_TYPE_NONE, true,
"allocSync error: allocSync() expects arguments: "
"VSAM dataset name, schema JSON object.");
return info.Env().Null().ToObject();
}
return Construct(info, true);
}
// static
Napi::Object WrappedVsam::OpenSync(const Napi::CallbackInfo &info) {
if ((info.Length() < 2 || !info[0].IsString() || !info[1].IsObject()) ||
(info.Length() == 3 && !info[2].IsString()) || (info.Length() > 3)) {
Napi::HandleScope scope(info.Env());
throwError(info, -1, ARG0_TYPE_NONE, true,
"openSync error: openSync() expects arguments: VSAM dataset "
"name, schema JSON object, optional fopen() mode.");
return info.Env().Null().ToObject();
}
return Construct(info, false);
}
// static
Napi::Boolean WrappedVsam::Exist(const Napi::CallbackInfo &info) {
if (info.Length() != 1 || !info[0].IsString()) {
Napi::HandleScope scope(info.Env());
throwError(info, -1, ARG0_TYPE_NONE, true,
"exist error: exist() expects argument: VSAM dataset name.");
return Napi::Boolean::New(info.Env(), false);
}
const std::string &path(static_cast<std::string>(info[0].As<Napi::String>()));
return Napi::Boolean::New(info.Env(), VsamFile::isDatasetExist(path));
}
void WrappedVsam::Close(const Napi::CallbackInfo &info) {
#ifdef DEBUG
fprintf(stderr, "Closing VSAM dataset...\n");
#endif
if (errorIfNotOpen(info, -1, ARG0_TYPE_NONE, "close"))
return;
static Napi::Function dummy;
UvWorkData uvdata(nullptr, dummy, nullptr);
pVsamFile_->routeToVsamThread(MSG_CLOSE, &VsamFile::Close, &uvdata);
if (uvdata.rc_) {
Napi::HandleScope scope(info.Env());
throwError(info, -1, ARG0_TYPE_NONE, false, uvdata.errmsg_.c_str());
return;
}
#ifdef DEBUG
fprintf(stderr, "Close deleteVsamFileObj...\n");
#endif
deleteVsamFileObj();
}
void WrappedVsam::Delete(const Napi::CallbackInfo &info) {
if (info.Length() == 2 && info[0].IsString() && info[1].IsFunction()) {
FindDelete_(info, "delete", nullptr, 1); // callback arg #
} else if (info.Length() == 3 && info[0].IsObject() && info[1].IsNumber() &&
info[2].IsFunction()) {
FindDelete_(info, "delete", nullptr, 2);
} else if (info.Length() == 1 && info[0].IsFunction())
Delete_(info);
else {
Napi::HandleScope scope(info.Env());
throwError(info, 0, ARG0_TYPE_ERR, true,
"delete error: delete() expects arguments: "
"(err), or: "
"key-string, (count, err), or: "
"key-buffer, key-buffer-length, (count, err).");
}
}
int WrappedVsam::Delete_(const Napi::CallbackInfo &info, UvWorkData **ppdata) {
Napi::HandleScope scope(info.Env());
if (ppdata != nullptr) {
// called for a sync API
if (errorIfNotOpen(info, -1, ARG0_TYPE_NONE, "deleteSync"))
return -1;
Napi::Function dummycb;
*ppdata = new UvWorkData(pVsamFile_, dummycb, info.Env());
return 0;
}
if (errorIfNotOpen(info, 0, ARG0_TYPE_ERR, "delete"))
return -1;
uv_work_t *request = new uv_work_t;
Napi::Function cb = info[0].As<Napi::Function>();
request->data = new UvWorkData(pVsamFile_, cb, info.Env());
uv_queue_work(uv_default_loop(), request, DeleteExecute, DeleteComplete);
return 0;
}
Napi::Value WrappedVsam::DeleteSync(const Napi::CallbackInfo &info) {
Napi::HandleScope scope(info.Env());
UvWorkData *pdata = nullptr;
int rc;
bool findDelete = true;
if ((info.Length() == 1 && info[0].IsString()) ||
(info.Length() == 2 && info[0].IsObject() && info[1].IsNumber())) {
if (FindDelete_(info, "deleteSync", &pdata))
return Napi::Number::New(info.Env(), 0);
} else if (info.Length() == 0) {
if (Delete_(info, &pdata))
return Napi::Number::New(info.Env(), 0);
findDelete = false;
} else {
throwError(info, -1, ARG0_TYPE_NONE, true,
"deleteSync error: deleteSync() expects arguments: "
"key-string, "
"or: key-buffer, key-buffer-length.");
return Napi::Number::New(info.Env(), 0);
}
assert(pdata != nullptr);
if (findDelete) {
rc = pVsamFile_->routeToVsamThread(MSG_FIND_DELETE,
&VsamFile::FindDeleteExecute, pdata);
if (rc || pdata->rc_) {
if (pdata->rc_ == 8) { // no record found
delete pdata;
return Napi::Number::New(info.Env(), 0);
}
throwError(info, -1, ARG0_TYPE_NONE, true, pdata->errmsg_.c_str());
delete pdata;
return Napi::Number::New(info.Env(), 0);
}
int count = pdata->count_;
delete pdata;
return Napi::Number::New(info.Env(), count);
} else {
rc = pVsamFile_->routeToVsamThread(MSG_DELETE, &VsamFile::DeleteExecute,
pdata);
if (rc || pdata->rc_) {
throwError(info, -1, ARG0_TYPE_NONE, true, pdata->errmsg_.c_str());
delete pdata;
return Napi::Number::New(info.Env(), 0);
}
delete pdata;
return Napi::Number::New(info.Env(), 1);
}
}
int WrappedVsam::Write_(const Napi::CallbackInfo &info, const char *pApiName,
UvWorkData **ppdata) {
CbFirstArgType firstArgType =
ppdata == nullptr ? ARG0_TYPE_ERR : ARG0_TYPE_NONE;
if (errorIfNotOpen(info, 0, firstArgType, pApiName))
return -1;
Napi::HandleScope scope(info.Env());
const Napi::Object &record = info[0].ToObject();
int reclen = pVsamFile_->getRecordLength();
char *recbuf = (char *)malloc(reclen);
DCHECK(recbuf != nullptr && reclen > 0);
memset(recbuf, 0, reclen);
char *fldbuf = recbuf;
std::vector<LayoutItem> &layout = pVsamFile_->getLayout();
std::string errmsg;
for (auto i = layout.begin(); i != layout.end(); ++i) {
const Napi::Value &field = record.Get(i->name);
if (i->type == LayoutItem::STRING || i->type == LayoutItem::HEXADECIMAL) {
#ifdef DEBUG
if (field.IsUndefined()) {
fprintf(stderr,
"%s value of %s was not set, will attempt to set it to "
"all 0x00\n",
pApiName, i->name.c_str());
}
#endif
const std::string &str =
field.IsUndefined() ? ""
: static_cast<std::string>(
Napi::String(info.Env(), field.ToString()));
if (i->type == LayoutItem::STRING) {
if (!VsamFile::isStrValid(*i, str, pApiName, errmsg)) {
free(recbuf);
throwError(info, 0, firstArgType, true, errmsg.c_str());
return -1;
}
DCHECK(str.length() <= i->maxLength);
DCHECK((fldbuf - recbuf) + str.length() <= reclen);
if (str.length() > 0)
memcpy(fldbuf, str.c_str(), str.length());
} else {
if (!VsamFile::isHexStrValid(*i, str, pApiName, errmsg)) {
free(recbuf);
throwError(info, 0, firstArgType, true, errmsg.c_str());
return -1;
}
DCHECK((fldbuf - recbuf) + i->maxLength <= reclen);
VsamFile::hexstrToBuffer(fldbuf, i->maxLength, str.c_str());
}
} else {
free(recbuf);
throwError(info, 0, firstArgType, true,
"%s error: unexpected JSON data type %d for %s.", pApiName,
i->type, i->name.c_str());
return -1;
}
fldbuf += i->maxLength;
}
if (ppdata != nullptr) {
// called for a sync API
Napi::Function dummycb;
*ppdata = new UvWorkData(pVsamFile_, dummycb, info.Env(), "", recbuf);
return 0;
}
uv_work_t *request = new uv_work_t;
Napi::Function cb = info[1].As<Napi::Function>();
request->data = new UvWorkData(pVsamFile_, cb, info.Env(), "", recbuf);
uv_queue_work(uv_default_loop(), request, WriteExecute, WriteComplete);
return 0;
}
void WrappedVsam::Write(const Napi::CallbackInfo &info) {
if (info.Length() == 2 && info[0].IsObject() && info[1].IsFunction())
Write_(info, "write");
else {
Napi::HandleScope scope(info.Env());
throwError(info, 0, ARG0_TYPE_ERR, true,
"write error: write() expects arguments: record, (err).");
}
}
Napi::Value WrappedVsam::WriteSync(const Napi::CallbackInfo &info) {
Napi::HandleScope scope(info.Env());
UvWorkData *pdata = nullptr;
if (info.Length() == 1 && info[0].IsObject()) {
if (Write_(info, "writeSync", &pdata))
return Napi::Number::New(info.Env(), 0);
} else {
throwError(info, -1, ARG0_TYPE_NONE, true,
"writeSync error: writeSync() expects arguments: record.");
return Napi::Number::New(info.Env(), 0);
}
int rc =
pVsamFile_->routeToVsamThread(MSG_WRITE, &VsamFile::WriteExecute, pdata);
if (rc || pdata->rc_) {
throwError(info, -1, ARG0_TYPE_NONE, true, pdata->errmsg_.c_str());
delete pdata;
return Napi::Number::New(info.Env(), 0);
}
delete pdata;
return Napi::Number::New(info.Env(), 1);
}
void WrappedVsam::Update(const Napi::CallbackInfo &info) {
if (info.Length() == 3 && info[0].IsString() && info[1].IsObject() &&
info[2].IsFunction()) {
FindUpdate_(info, "update", nullptr, 1, 2); // record and callback arg #s
} else if (info.Length() == 4 && info[0].IsObject() && info[1].IsNumber() &&
info[2].IsObject() && info[3].IsFunction()) {
FindUpdate_(info, "update", nullptr, 2, 3); // record and callbak>ck arg #s
} else if (info.Length() == 2 && info[0].IsObject() && info[1].IsFunction())
Update_(info, "update");
else {
Napi::HandleScope scope(info.Env());
throwError(info, 0, ARG0_TYPE_ERR, true,
"update error: update() expects arguments: "
"record, (err), "
"or: key-string, record, (count, err), "
"or: key-buffer, key-buffer-length, record, (count, err).");
}
}
int WrappedVsam::Update_(const Napi::CallbackInfo &info, const char *pApiName,
UvWorkData **ppdata) {
CbFirstArgType firstArgType =
ppdata == nullptr ? ARG0_TYPE_ERR : ARG0_TYPE_NONE;
if (errorIfNotOpen(info, 0, firstArgType, pApiName))
return -1;
Napi::HandleScope scope(info.Env());
const Napi::Object &record = info[0].ToObject();
int reclen = pVsamFile_->getRecordLength();
char *recbuf = (char *)malloc(reclen);
DCHECK(recbuf != nullptr);
memset(recbuf, 0, reclen);
char *fldbuf = recbuf;
std::vector<LayoutItem> &layout = pVsamFile_->getLayout();
std::string errmsg;
for (auto i = layout.begin(); i != layout.end(); ++i) {
const Napi::Value &field = record.Get(i->name);
if (field.IsUndefined()) {
free(recbuf);
throwError(info, 0, firstArgType, true,
"%s error: update value for %s has not been set.", pApiName,
i->name.c_str());
return -1;
}
if (i->type == LayoutItem::STRING || i->type == LayoutItem::HEXADECIMAL) {
const std::string &str =
static_cast<std::string>(Napi::String(info.Env(), field.ToString()));
if (i->type == LayoutItem::STRING) {
if (!VsamFile::isStrValid(*i, str, pApiName, errmsg)) {
free(recbuf);
throwError(info, 0, firstArgType, true, errmsg.c_str());
return -1;
}
DCHECK(str.length() <= i->maxLength);
if (str.length() > 0)
memcpy(fldbuf, str.c_str(), str.length());
} else {
if (!VsamFile::isHexStrValid(*i, str, pApiName, errmsg)) {
free(recbuf);
throwError(info, 0, firstArgType, true, errmsg.c_str());
return -1;
}
VsamFile::hexstrToBuffer(fldbuf, i->maxLength, str.c_str());
}
fldbuf += i->maxLength;
} else {
free(recbuf);
throwError(info, 0, firstArgType, true,
"%s error: unexpected data type %d for %s.", pApiName, i->type,
i->name.c_str());
return -1;
}
}
if (ppdata != nullptr) {
// called for a sync API
Napi::Function dummycb;
*ppdata = new UvWorkData(pVsamFile_, dummycb, info.Env(), "", recbuf);
return 0;
}
uv_work_t *request = new uv_work_t;
Napi::Function cb = info[1].As<Napi::Function>();
request->data = new UvWorkData(pVsamFile_, cb, info.Env(), "", recbuf);
uv_queue_work(uv_default_loop(), request, UpdateExecute, UpdateComplete);
return 0;
}
Napi::Value WrappedVsam::UpdateSync(const Napi::CallbackInfo &info) {
Napi::HandleScope scope(info.Env());
UvWorkData *pdata = nullptr;
int rc;
bool findUpdate = true;
if (info.Length() == 2 && info[0].IsString() && info[1].IsObject()) {
if (FindUpdate_(info, "updateSync", &pdata, 1,
-1)) // record and callback arg #s
return Napi::Number::New(info.Env(), 0);
} else if (info.Length() == 3 && info[0].IsObject() && info[1].IsNumber() &&
info[2].IsObject()) {
if (FindUpdate_(info, "updateSync", &pdata, 2, -1))
return Napi::Number::New(info.Env(), 0);
} else if (info.Length() == 1 && info[0].IsObject()) {
if (Update_(info, "updateSync", &pdata))
return Napi::Number::New(info.Env(), 0);
findUpdate = false;
} else {
throwError(info, -1, ARG0_TYPE_NONE, true,
"updateSync error: updateSync() expects arguments: "
"record, "
"or: key-string, record, "
"or: key-buffer, key-buffer-length, record.");
return Napi::Number::New(info.Env(), 0);
}
assert(pdata != nullptr);
if (findUpdate) {
rc = pVsamFile_->routeToVsamThread(MSG_FIND_UPDATE,
&VsamFile::FindUpdateExecute, pdata);
if (rc || pdata->rc_) {
if (pdata->rc_ == 8) { // no record found
delete pdata;
return Napi::Number::New(info.Env(), 0);
}
throwError(info, -1, ARG0_TYPE_NONE, true, pdata->errmsg_.c_str());
delete pdata;
return Napi::Number::New(info.Env(), 0);
}
int count = pdata->count_;
delete pdata;
return Napi::Number::New(info.Env(), count);
} else {
rc = pVsamFile_->routeToVsamThread(MSG_UPDATE, &VsamFile::UpdateExecute,
pdata);
if (rc || pdata->rc_) {
throwError(info, -1, ARG0_TYPE_NONE, true, pdata->errmsg_.c_str());
delete pdata;
return Napi::Number::New(info.Env(), 0);
}
delete pdata;
return Napi::Number::New(info.Env(), 1);
}
}
void WrappedVsam::FindEq(const Napi::CallbackInfo &info) {
if (info.Length() == 2 && info[0].IsString() && info[1].IsFunction())
Find(info, __KEY_EQ, "find", 1);
else if (info.Length() == 3 && info[0].IsObject() && info[1].IsNumber() &&
info[2].IsFunction())
Find(info, __KEY_EQ, "find", 2);
else {
Napi::HandleScope scope(info.Env());
throwError(info, 1, ARG0_TYPE_NULL, true,
"find error: find() expects arguments: "
"key-string, (record, err), "
"or key-buffer, key-buffer-length, (record, err).");
}
}
Napi::Value WrappedVsam::FindSync_(const Napi::CallbackInfo &info,
UvWorkData *pdata) {
assert(pdata != nullptr);
int rc =
pVsamFile_->routeToVsamThread(MSG_FIND, &VsamFile::FindExecute, pdata);
if (rc || pdata->rc_) {
if (pdata->rc_ == 8) { // no record found
delete pdata;
return info.Env().Null();
}
throwError(info, -1, ARG0_TYPE_NONE, true, pdata->errmsg_.c_str());
delete pdata;
return info.Env().Null();
}
Napi::Value record = createRecordObject(pdata);
delete pdata;
return record;
}
Napi::Value WrappedVsam::FindEqSync(const Napi::CallbackInfo &info) {
Napi::HandleScope scope(info.Env());
UvWorkData *pdata = nullptr;
if ((info.Length() == 2 && info[0].IsObject() && info[1].IsNumber()) ||
(info.Length() == 1 && info[0].IsString())) {
if (Find(info, __KEY_EQ, "findSync", -1, &pdata, ARG0_TYPE_NONE))
return info.Env().Null();
} else {
throwError(info, -1, ARG0_TYPE_NONE, true,
"findSync error: findSync() expects arguments: "
"key-string, "
"or key-buffer, key-buffer-length.");
return info.Env().Null();
}
return FindSync_(info, pdata);
}
void WrappedVsam::FindGe(const Napi::CallbackInfo &info) {
if (info.Length() == 2 && info[0].IsString() && info[1].IsFunction()) {
Find(info, __KEY_GE, "findge", 1);
} else if (info.Length() == 3 && info[0].IsObject() && info[1].IsNumber() &&
info[2].IsFunction()) {
Find(info, __KEY_GE, "findge", 2);
} else {
Napi::HandleScope scope(info.Env());
throwError(info, 1, ARG0_TYPE_NULL, true,
"findge error: findge() expects arguments: "
"or key-string, (record, err), "
"or key-buffer, key-buffer-length, (record, err).");
}
}
Napi::Value WrappedVsam::FindGeSync(const Napi::CallbackInfo &info) {
Napi::HandleScope scope(info.Env());
UvWorkData *pdata = nullptr;
if ((info.Length() == 2 && info[0].IsObject() && info[1].IsNumber()) ||
(info.Length() == 1 && info[0].IsString())) {
if (Find(info, __KEY_GE, "findgeSync", -1, &pdata, ARG0_TYPE_NONE))
return info.Env().Null();
} else {
throwError(info, -1, ARG0_TYPE_NONE, true,
"findgeSync error: findgeSync() expects arguments: "
"key-string, "
"or key-buffer, key-buffer-length.");
return info.Env().Null();
}
return FindSync_(info, pdata);
}
void WrappedVsam::FindFirst(const Napi::CallbackInfo &info) {
if (info.Length() == 1 && info[0].IsFunction())
Find(info, __KEY_FIRST, "findfirst", 0);
else {
Napi::HandleScope scope(info.Env());
throwError(info, 1, ARG0_TYPE_NULL, true,
"findfirst error: findfirst() expects argument: (record, err).");
}
}
Napi::Value WrappedVsam::FindFirstSync(const Napi::CallbackInfo &info) {
UvWorkData *pdata = nullptr;
if (info.Length() == 0) {
if (Find(info, __KEY_FIRST, "findfirstSync", -1, &pdata, ARG0_TYPE_NONE))
return info.Env().Null();
} else {
Napi::HandleScope scope(info.Env());
throwError(info, 1, ARG0_TYPE_NULL, true,
"findfirstSync error: findfirstSync() expects no argument.");
return info.Env().Null();
}
return FindSync_(info, pdata);
}
void WrappedVsam::FindLast(const Napi::CallbackInfo &info) {
if (info.Length() == 1 && info[0].IsFunction())
Find(info, __KEY_LAST, "findlast", 0);
else {