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#include "node.h"
#include "file.h"
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <assert.h>
using namespace v8;
using namespace node;
#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 String::New("Bad argument")
#define MAKE_CALLBACK_PTR \
Persistent<Function> *callback = NULL; \
Local<Value> last_arg = args[args.Length()-1]; \
if (last_arg->IsFunction()) { \
Local<Function> l = Local<Function>::Cast(last_arg); \
callback = new Persistent<Function>(); \
*callback = Persistent<Function>::New(l); \
} \
node::eio_warmup(); \
#define CALL_CALLBACK_PTR(req, argc, argv) \
do { \
if (req->data) { \
Persistent<Function> *callback = \
reinterpret_cast<Persistent<Function>*>(req->data); \
TryCatch try_catch; \
(*callback)->Call(Context::GetCurrent()->Global(), argc, argv); \
if(try_catch.HasCaught()) \
node::FatalException(try_catch); \
delete callback; \
} \
} while(0)
#define DEFINE_SIMPLE_CB(name) \
static int After##name (eio_req *req) \
{ \
HandleScope scope; \
Local<Value> argv[] = { Integer::New(req->errorno) }; \
CALL_CALLBACK_PTR(req, 1, argv); \
return 0; \
} \
DEFINE_SIMPLE_CB(Close)
static Handle<Value> Close (const Arguments& args)
{
if (args.Length() < 1 || !args[0]->IsInt32())
return ThrowException(BAD_ARGUMENTS);
HandleScope scope;
int fd = args[0]->Int32Value();
MAKE_CALLBACK_PTR
eio_close(fd, EIO_PRI_DEFAULT, AfterClose, callback);
return Undefined();
}
DEFINE_SIMPLE_CB(Rename)
static Handle<Value> Rename (const Arguments& args)
{
if (args.Length() < 2 || !args[0]->IsString() || !args[1]->IsString())
return ThrowException(BAD_ARGUMENTS);
HandleScope scope;
String::Utf8Value path(args[0]->ToString());
String::Utf8Value new_path(args[1]->ToString());
MAKE_CALLBACK_PTR
eio_rename(*path, *new_path, EIO_PRI_DEFAULT, AfterRename, callback);
return Undefined();
}
DEFINE_SIMPLE_CB(Unlink)
static Handle<Value> Unlink (const Arguments& args)
{
if (args.Length() < 1 || !args[0]->IsString())
return ThrowException(BAD_ARGUMENTS);
HandleScope scope;
String::Utf8Value path(args[0]->ToString());
MAKE_CALLBACK_PTR
eio_unlink(*path, EIO_PRI_DEFAULT, AfterUnlink, callback);
return Undefined();
}
DEFINE_SIMPLE_CB(RMDir)
static Handle<Value> RMDir (const Arguments& args)
{
if (args.Length() < 1 || !args[0]->IsString())
return ThrowException(BAD_ARGUMENTS);
HandleScope scope;
String::Utf8Value path(args[0]->ToString());
MAKE_CALLBACK_PTR
eio_rmdir(*path, EIO_PRI_DEFAULT, AfterRMDir, callback);
return Undefined();
}
static int
AfterOpen (eio_req *req)
{
HandleScope scope;
const int argc = 2;
Local<Value> argv[argc];
argv[0] = Integer::New(req->errorno);
argv[1] = Integer::New(req->result);
CALL_CALLBACK_PTR(req, argc, argv);
return 0;
}
static Handle<Value>
Open (const Arguments& args)
{
if ( args.Length() < 3
|| !args[0]->IsString()
|| !args[1]->IsInt32()
|| !args[2]->IsInt32()
) return ThrowException(BAD_ARGUMENTS);
HandleScope scope;
String::Utf8Value path(args[0]->ToString());
int flags = args[1]->Int32Value();
mode_t mode = static_cast<mode_t>(args[2]->Int32Value());
MAKE_CALLBACK_PTR
eio_open(*path, flags, mode, EIO_PRI_DEFAULT, AfterOpen, callback);
return Undefined();
}
static int
AfterWrite (eio_req *req)
{
HandleScope scope;
free(req->ptr2);
ssize_t written = req->result;
const int argc = 2;
Local<Value> argv[argc];
argv[0] = Integer::New(req->errorno);
argv[1] = written >= 0 ? Integer::New(written) : Integer::New(0);
CALL_CALLBACK_PTR(req, argc, argv);
return 0;
}
/* node.fs.write(fd, data, position, callback)
* 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 callback(errorno, written)
*/
static Handle<Value>
Write (const Arguments& args)
{
if ( args.Length() < 3
|| !args[0]->IsInt32()
) return ThrowException(BAD_ARGUMENTS);
HandleScope scope;
int fd = args[0]->Int32Value();
off_t pos = args[2]->IsNumber() ? args[2]->IntegerValue() : -1;
char *buf = NULL;
size_t len = 0;
if (args[1]->IsString()) {
// utf8 encoding
Local<String> string = args[1]->ToString();
len = string->Utf8Length();
buf = reinterpret_cast<char*>(malloc(len));
string->WriteUtf8(buf, len);
} else if (args[1]->IsArray()) {
// raw encoding
Local<Array> array = Local<Array>::Cast(args[1]);
len = array->Length();
buf = reinterpret_cast<char*>(malloc(len));
for (unsigned int i = 0; i < len; i++) {
Local<Value> int_value = array->Get(Integer::New(i));
buf[i] = int_value->Int32Value();
}
} else {
return ThrowException(BAD_ARGUMENTS);
}
MAKE_CALLBACK_PTR
eio_write(fd, buf, len, pos, EIO_PRI_DEFAULT, AfterWrite, callback);
return Undefined();
}
static int
AfterUtf8Read (eio_req *req)
{
HandleScope scope;
const int argc = 2;
Local<Value> argv[argc];
argv[0] = Integer::New(req->errorno);
char *buf = reinterpret_cast<char*>(req->ptr2);
if (req->result == 0) {
// eof
argv[1] = Local<Value>::New(Null());
} else {
argv[1] = String::New(buf, req->result);
}
CALL_CALLBACK_PTR(req, argc, argv);
return 0;
}
static int
AfterRawRead(eio_req *req)
{
HandleScope scope;
const int argc = 2;
Local<Value> argv[argc];
argv[0] = Integer::New(req->errorno);
char *buf = reinterpret_cast<char*>(req->ptr2);
if (req->result == 0) {
// eof
argv[1] = Local<Value>::New(Null());
} else {
// raw encoding
size_t len = req->result;
Local<Array> array = Array::New(len);
for (unsigned int i = 0; i < len; i++) {
array->Set(Integer::New(i), Integer::New(buf[i]));
}
argv[1] = array;
}
CALL_CALLBACK_PTR(req, argc, argv);
return 0;
}
/* node.fs.read(fd, length, position, encoding, callback)
* 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 either node.fs.UTF8 or node.fs.RAW
*
* 4 callback(errorno, data)
*/
static Handle<Value>
Read (const Arguments& args)
{
if ( args.Length() < 3
|| !args[0]->IsInt32() // fd
|| !args[1]->IsNumber() // len
) return ThrowException(BAD_ARGUMENTS);
HandleScope scope;
int fd = args[0]->Int32Value();
size_t len = args[1]->IntegerValue();
off_t pos = args[2]->IsNumber() ? args[2]->IntegerValue() : -1;
enum encoding encoding = RAW;
if (args[3]->IsInt32()) {
encoding = static_cast<enum encoding>(args[3]->Int32Value());
}
MAKE_CALLBACK_PTR
// NOTE: 2nd param: NULL pointer tells eio to allocate it itself
eio_read(fd, NULL, len, pos, EIO_PRI_DEFAULT,
encoding == UTF8 ? AfterUtf8Read : AfterRawRead, callback);
return Undefined();
}
static int
AfterStat (eio_req *req)
{
HandleScope scope;
const int argc = 2;
Local<Value> argv[argc];
argv[0] = Integer::New(req->errorno);
Local<Object> stats = Object::New();
argv[1] = stats;
if (req->result == 0) {
struct stat *s = reinterpret_cast<struct stat*>(req->ptr2);
/* 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, Date::New(1000*static_cast<double>(s->st_atime)));
/* time of last modification */
stats->Set(MTIME_SYMBOL, Date::New(1000*static_cast<double>(s->st_mtime)));
/* time of last status change */
stats->Set(CTIME_SYMBOL, Date::New(1000*static_cast<double>(s->st_ctime)));
}
CALL_CALLBACK_PTR(req, argc, argv); \
return 0;
}
static Handle<Value>
Stat (const Arguments& args)
{
if (args.Length() < 1 || !args[0]->IsString())
return ThrowException(BAD_ARGUMENTS);
HandleScope scope;
String::Utf8Value path(args[0]->ToString());
MAKE_CALLBACK_PTR
eio_stat(*path, EIO_PRI_DEFAULT, AfterStat, callback);
return Undefined();
}
static Handle<Value>
StrError (const Arguments& args)
{
if (args.Length() < 1) return v8::Undefined();
if (!args[0]->IsNumber()) return v8::Undefined();
HandleScope scope;
int errorno = args[0]->IntegerValue();
Local<String> message = String::New(strerror(errorno));
return scope.Close(message);
}
void
File::Initialize (Handle<Object> target)
{
HandleScope scope;
// POSIX Wrappers
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, "stat", Stat);
NODE_SET_METHOD(target, "unlink", Unlink);
NODE_SET_METHOD(target, "write", Write);
NODE_SET_METHOD(target, "strerror", StrError);
}