node/src/node_file.cc at debugger · bionicpill/node · GitHub

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#include <node_file.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <stdlib.h>

#include <unistd.h>

#include <assert.h>

#include <string.h>

namespace node {

using namespace v8;

#define DEV_SYMBOL String::NewSymbol("dev")

#define INO_SYMBOL String::NewSymbol("ino")

#define MODE_SYMBOL String::NewSymbol("mode")

#define NLINK_SYMBOL String::NewSymbol("nlink")

#define UID_SYMBOL String::NewSymbol("uid")

#define GID_SYMBOL String::NewSymbol("gid")

#define RDEV_SYMBOL String::NewSymbol("rdev")

#define SIZE_SYMBOL String::NewSymbol("size")

#define BLKSIZE_SYMBOL String::NewSymbol("blksize")

#define BLOCKS_SYMBOL String::NewSymbol("blocks")

#define ATIME_SYMBOL String::NewSymbol("atime")

#define MTIME_SYMBOL String::NewSymbol("mtime")

#define CTIME_SYMBOL String::NewSymbol("ctime")

#define BAD_ARGUMENTS Exception::TypeError(String::New("Bad argument"))

void EIOPromise::Attach(void) {

ev_ref(EV_DEFAULT_UC);

Promise::Attach();

}

void EIOPromise::Detach(void) {

Promise::Detach();

ev_unref(EV_DEFAULT_UC);

}

Handle<Value> EIOPromise::New(const v8::Arguments& args) {

HandleScope scope;

EIOPromise *promise = new EIOPromise();

promise->Wrap(args.This());

promise->Attach();

return args.This();

}

EIOPromise* EIOPromise::Create() {

HandleScope scope;

Local<Object> handle =

EIOPromise::constructor_template->GetFunction()->NewInstance();

return ObjectWrap::Unwrap<EIOPromise>(handle);

}

static Persistent<FunctionTemplate> stats_constructor_template;

static Local<Object> BuildStatsObject(struct stat * s) {

HandleScope scope;

Local<Object> stats =

stats_constructor_template->GetFunction()->NewInstance();

/* ID of device containing file */

stats->Set(DEV_SYMBOL, Integer::New(s->st_dev));

/* inode number */

stats->Set(INO_SYMBOL, Integer::New(s->st_ino));

/* protection */

stats->Set(MODE_SYMBOL, Integer::New(s->st_mode));

/* number of hard links */

stats->Set(NLINK_SYMBOL, Integer::New(s->st_nlink));

/* user ID of owner */

stats->Set(UID_SYMBOL, Integer::New(s->st_uid));

/* group ID of owner */

stats->Set(GID_SYMBOL, Integer::New(s->st_gid));

/* device ID (if special file) */

stats->Set(RDEV_SYMBOL, Integer::New(s->st_rdev));

/* total size, in bytes */

stats->Set(SIZE_SYMBOL, Integer::New(s->st_size));

/* blocksize for filesystem I/O */

stats->Set(BLKSIZE_SYMBOL, Integer::New(s->st_blksize));

/* number of blocks allocated */

stats->Set(BLOCKS_SYMBOL, Integer::New(s->st_blocks));

/* time of last access */

stats->Set(ATIME_SYMBOL, NODE_UNIXTIME_V8(s->st_atime));

/* time of last modification */

stats->Set(MTIME_SYMBOL, NODE_UNIXTIME_V8(s->st_mtime));

/* time of last status change */

stats->Set(CTIME_SYMBOL, NODE_UNIXTIME_V8(s->st_ctime));

return scope.Close(stats);

}

int EIOPromise::After(eio_req *req) {

HandleScope scope;

EIOPromise *promise = reinterpret_cast<EIOPromise*>(req->data);

assert(req == promise->req_);

if (req->errorno != 0) {

Local<Value> exception = Exception::Error(

String::NewSymbol(strerror(req->errorno)));

promise->EmitError(1, &exception);

return 0;

}

int argc = 0;

Local<Value> argv[5]; // 5 is the maximum number of args

switch (req->type) {

case EIO_CLOSE:

case EIO_RENAME:

case EIO_UNLINK:

case EIO_RMDIR:

case EIO_MKDIR:

argc = 0;

break;

case EIO_OPEN:

case EIO_SENDFILE:

argc = 1;

argv[0] = Integer::New(req->result);

break;

case EIO_WRITE:

argc = 1;

argv[0] = Integer::New(req->result);

assert(req->ptr2);

delete [] req->ptr2;

break;

case EIO_STAT:

{

struct stat *s = reinterpret_cast<struct stat*>(req->ptr2);

argc = 1;

argv[0] = BuildStatsObject(s);

break;

}

case EIO_READ:

{

argc = 2;

argv[0] = Encode(req->ptr2, req->result, promise->encoding_);

argv[1] = Integer::New(req->result);

break;

}

case EIO_READDIR:

{

char *namebuf = static_cast<char*>(req->ptr2);

int nnames = req->result;

Local<Array> names = Array::New(nnames);

for (int i = 0; i < nnames; i++) {

Local<String> name = String::New(namebuf);

names->Set(Integer::New(i), name);

#ifndef NDEBUG

namebuf += strlen(namebuf);

assert(*namebuf == '\0');

namebuf += 1;

#else

namebuf += strlen(namebuf) + 1;

#endif

}

argc = 1;

argv[0] = names;

break;

}

default:

assert(0 && "Unhandled eio response");

}

promise->EmitSuccess(argc, argv);

return 0;

}

static Handle<Value> Close(const Arguments& args) {

HandleScope scope;

if (args.Length() < 1 || !args[0]->IsInt32()) {

return ThrowException(BAD_ARGUMENTS);

}

int fd = args[0]->Int32Value();

return scope.Close(EIOPromise::Close(fd));

}

static Handle<Value> Stat(const Arguments& args) {

HandleScope scope;

if (args.Length() < 1 || !args[0]->IsString()) {

return ThrowException(BAD_ARGUMENTS);

}

String::Utf8Value path(args[0]->ToString());

return scope.Close(EIOPromise::Stat(*path));

}

static Handle<Value> Rename(const Arguments& args) {

HandleScope scope;

if (args.Length() < 2 || !args[0]->IsString() || !args[1]->IsString()) {

return ThrowException(BAD_ARGUMENTS);

}

String::Utf8Value path(args[0]->ToString());

String::Utf8Value new_path(args[1]->ToString());

return scope.Close(EIOPromise::Rename(*path, *new_path));

}

static Handle<Value> Unlink(const Arguments& args) {

HandleScope scope;

if (args.Length() < 1 || !args[0]->IsString()) {

return ThrowException(BAD_ARGUMENTS);

}

String::Utf8Value path(args[0]->ToString());

return scope.Close(EIOPromise::Unlink(*path));

}

static Handle<Value> RMDir(const Arguments& args) {

HandleScope scope;

if (args.Length() < 1 || !args[0]->IsString()) {

return ThrowException(BAD_ARGUMENTS);

}

String::Utf8Value path(args[0]->ToString());

return scope.Close(EIOPromise::RMDir(*path));

}

static Handle<Value> MKDir(const Arguments& args) {

HandleScope scope;

if (args.Length() < 2 || !args[0]->IsString() || !args[1]->IsInt32()) {

return ThrowException(BAD_ARGUMENTS);

}

String::Utf8Value path(args[0]->ToString());

mode_t mode = static_cast<mode_t>(args[1]->Int32Value());

return scope.Close(EIOPromise::MKDir(*path, mode));

}

static Handle<Value> SendFile(const Arguments& args) {

HandleScope scope;

if (args.Length() < 4 || !args[0]->IsInt32() || !args[1]->IsInt32() || !args[3]->IsNumber()) {

return ThrowException(BAD_ARGUMENTS);

}

int out_fd = args[0]->Int32Value();

int in_fd = args[1]->Int32Value();

off_t in_offset = args[2]->IsNumber() ? args[2]->IntegerValue() : -1;

size_t length = args[3]->IntegerValue();

return scope.Close(EIOPromise::SendFile(out_fd, in_fd, in_offset, length));

}

static Handle<Value> ReadDir(const Arguments& args) {

HandleScope scope;

if (args.Length() < 1 || !args[0]->IsString()) {

return ThrowException(BAD_ARGUMENTS);

}

String::Utf8Value path(args[0]->ToString());

return scope.Close(EIOPromise::ReadDir(*path));

}

static Handle<Value> Open(const Arguments& args) {

HandleScope scope;

if ( args.Length() < 3

|| !args[0]->IsString()

|| !args[1]->IsInt32()

|| !args[2]->IsInt32()

) return ThrowException(BAD_ARGUMENTS);

String::Utf8Value path(args[0]->ToString());

int flags = args[1]->Int32Value();

mode_t mode = static_cast<mode_t>(args[2]->Int32Value());

return scope.Close(EIOPromise::Open(*path, flags, mode));

}

/* node.fs.write(fd, data, position=null)

* Wrapper for write(2).

* 0 fd integer. file descriptor

* 1 data the data to write (string = utf8, array = raw)

* 2 position if integer, position to write at in the file.

* if null, write from the current position

* 3 encoding

static Handle<Value> Write(const Arguments& args) {

HandleScope scope;

if (args.Length() < 2 || !args[0]->IsInt32()) {

return ThrowException(BAD_ARGUMENTS);

}

int fd = args[0]->Int32Value();

off_t offset = args[2]->IsNumber() ? args[2]->IntegerValue() : -1;

enum encoding enc = ParseEncoding(args[3]);

ssize_t len = DecodeBytes(args[1], enc);

if (len < 0) {

Local<Value> exception = Exception::TypeError(String::New("Bad argument"));

return ThrowException(exception);

}

char * buf = new char[len];

ssize_t written = DecodeWrite(buf, len, args[1], enc);

assert(written == len);

return scope.Close(EIOPromise::Write(fd, buf, len, offset));

}

/* node.fs.read(fd, length, position, encoding)

* Wrapper for read(2).

* 0 fd integer. file descriptor

* 1 length integer. length to read

* 2 position if integer, position to read from in the file.

* if null, read from the current position

* 3 encoding

static Handle<Value> Read(const Arguments& args) {

HandleScope scope;

if (args.Length() < 2 || !args[0]->IsInt32() || !args[1]->IsNumber()) {

return ThrowException(BAD_ARGUMENTS);

}

int fd = args[0]->Int32Value();

size_t len = args[1]->IntegerValue();

off_t pos = args[2]->IsNumber() ? args[2]->IntegerValue() : -1;

enum encoding encoding = ParseEncoding(args[3]);

return scope.Close(EIOPromise::Read(fd, len, pos, encoding));

}

Persistent<FunctionTemplate> EIOPromise::constructor_template;

void File::Initialize(Handle<Object> target) {

HandleScope scope;

NODE_SET_METHOD(target, "close", Close);

NODE_SET_METHOD(target, "open", Open);

NODE_SET_METHOD(target, "read", Read);

NODE_SET_METHOD(target, "rename", Rename);

NODE_SET_METHOD(target, "rmdir", RMDir);

NODE_SET_METHOD(target, "mkdir", MKDir);

NODE_SET_METHOD(target, "sendfile", SendFile);

NODE_SET_METHOD(target, "readdir", ReadDir);

NODE_SET_METHOD(target, "stat", Stat);

NODE_SET_METHOD(target, "unlink", Unlink);

NODE_SET_METHOD(target, "write", Write);

Local<FunctionTemplate> t = FunctionTemplate::New();

stats_constructor_template = Persistent<FunctionTemplate>::New(t);

target->Set(String::NewSymbol("Stats"),

stats_constructor_template->GetFunction());

Local<FunctionTemplate> t2 = FunctionTemplate::New(EIOPromise::New);

EIOPromise::constructor_template = Persistent<FunctionTemplate>::New(t2);

EIOPromise::constructor_template->Inherit(

Promise::constructor_template);

EIOPromise::constructor_template->InstanceTemplate()->

SetInternalFieldCount(1);

EIOPromise::constructor_template->SetClassName(

String::NewSymbol("EIOPromise"));

target->Set(String::NewSymbol("EIOPromise"),

EIOPromise::constructor_template->GetFunction());

}

} // end namespace node

node/src/node_file.cc at debugger · bionicpill/node · GitHub

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