node/src/node_stdio_win32.cc at master · tmpvar/node · GitHub

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// Copyright Joyent, Inc. and other Node contributors.

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

#include <node.h>

#include <node_stdio.h>

#include <v8.h>

#include <errno.h>

#include <fcntl.h>

#include <io.h>

#include <platform_win32.h>

using namespace v8;

namespace node {

#define THROW_ERROR(msg) \

return ThrowException(Exception::Error(String::New(msg)));

#define THROW_BAD_ARGS \

return ThrowException(Exception::TypeError(String::New("Bad argument")));

#define KEY(scancode, name) \

scancodes[scancode] = name;

#define MAX_KEY VK_OEM_PERIOD

static const char* scancodes[MAX_KEY + 1] = {0};

static Persistent<String> name_symbol;

static Persistent<String> shift_symbol;

static Persistent<String> ctrl_symbol;

static Persistent<String> meta_symbol;

static void init_scancode_table() {

KEY(VK_CANCEL, "break")

KEY(VK_BACK, "backspace")

KEY(VK_TAB, "tab")

KEY(VK_CLEAR, "clear")

KEY(VK_RETURN, "enter")

KEY(VK_PAUSE, "pause")

KEY(VK_ESCAPE, "escape")

KEY(VK_SPACE, "space")

KEY(VK_PRIOR, "pageup")

KEY(VK_NEXT, "pagedown")

KEY(VK_END, "end")

KEY(VK_HOME, "home")

KEY(VK_LEFT, "left")

KEY(VK_UP, "up")

KEY(VK_RIGHT, "right")

KEY(VK_DOWN, "down")

KEY(VK_SELECT, "select")

KEY(VK_PRINT, "print")

KEY(VK_EXECUTE, "execute")

KEY(VK_SNAPSHOT, "printscreen")

KEY(VK_INSERT, "insert")

KEY(VK_DELETE, "delete")

KEY(VK_HELP, "help")

KEY(VK_LWIN, "lwin")

KEY(VK_RWIN, "rwin")

KEY(VK_APPS, "apps")

KEY(VK_SLEEP, "sleep")

KEY(VK_NUMPAD0, "numpad0")

KEY(VK_NUMPAD1, "numpad1")

KEY(VK_NUMPAD2, "numpad2")

KEY(VK_NUMPAD3, "numpad3")

KEY(VK_NUMPAD4, "numpad4")

KEY(VK_NUMPAD5, "numpad5")

KEY(VK_NUMPAD6, "numpad6")

KEY(VK_NUMPAD7, "numpad7")

KEY(VK_NUMPAD8, "numpad8")

KEY(VK_NUMPAD9, "numpad9")

KEY(VK_MULTIPLY, "numpad*")

KEY(VK_ADD, "numpad+")

KEY(VK_SEPARATOR, "numpad,")

KEY(VK_SUBTRACT, "numpad-")

KEY(VK_DECIMAL, "numpad.")

KEY(VK_DIVIDE, "numpad/")

KEY(VK_F1, "f1")

KEY(VK_F2, "f2")

KEY(VK_F3, "f3")

KEY(VK_F4, "f4")

KEY(VK_F5, "f5")

KEY(VK_F6, "f6")

KEY(VK_F7, "f7")

KEY(VK_F8, "f8")

KEY(VK_F9, "f9")

KEY(VK_F10, "f10")

KEY(VK_F11, "f11")

KEY(VK_F12, "f12")

KEY(VK_F13, "f13")

KEY(VK_F14, "f14")

KEY(VK_F15, "f15")

KEY(VK_F16, "f16")

KEY(VK_F17, "f17")

KEY(VK_F18, "f18")

KEY(VK_F19, "f19")

KEY(VK_F20, "f20")

KEY(VK_F21, "f21")

KEY(VK_F22, "f22")

KEY(VK_F23, "f23")

KEY(VK_F24, "f24")

KEY(VK_OEM_PLUS, "+")

KEY(VK_OEM_MINUS, "-")

KEY(VK_OEM_COMMA, ",")

KEY(VK_OEM_PERIOD, ".")

// Letter keys have the ascii code of their uppercase equivalent as a scan code

for (int i = 0; i < 26; i++) {

char *name = new char[2];

name[0] = 'a' + i;

name[1] = '\0';

KEY('A' + i, name)

}

// Number keys have their ascii code as scan code

for (int i = '0'; i <= '9'; i++) {

char *name = new char[2];

name[0] = i;

name[1] = '\0';

KEY(i, name)

}

* Flush stdout and stderr on node exit

* Not necessary on windows, so a no-op

void Stdio::Flush() {

}

* STDERR should always be blocking

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

HandleScope scope;

if (args.Length() < 1)

return Undefined();

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

fprintf(stderr, "%s", reinterpret_cast<char*>(*msg));

return Undefined();

}

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

HandleScope scope;

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

DWORD result;

int r = GetConsoleMode((HANDLE)_get_osfhandle(fd), &result);

return scope.Close(r ? True() : False());

}

/* Whether stdio is currently in raw mode */

/* -1 means that it has not been set */

static int rawMode = -1;

static DWORD naturalMode = 0;

static void setRawMode(int newMode) {

DWORD flags = 0;

BOOL result;

if(rawMode == -1) {

GetConsoleMode((HANDLE)_get_osfhandle(STDIN_FILENO), &naturalMode);

}

flags |= (naturalMode & ENABLE_QUICK_EDIT_MODE);

flags |= flags ? ENABLE_EXTENDED_FLAGS : 0;

if (newMode != rawMode) {

if (newMode) {

// raw input

flags |= ENABLE_WINDOW_INPUT;

} else {

// input not raw, but still processing enough messages to make the

// tty watcher work (this mode is not the windows default)

flags |= ENABLE_ECHO_INPUT | ENABLE_INSERT_MODE | ENABLE_LINE_INPUT |

ENABLE_EXTENDED_FLAGS | ENABLE_PROCESSED_INPUT | ENABLE_WINDOW_INPUT;

}

result = SetConsoleMode((HANDLE)_get_osfhandle(STDIN_FILENO), flags);

if (result) {

rawMode = newMode;

}

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

HandleScope scope;

int newMode = !args[0]->IsFalse();

setRawMode(newMode);

if (newMode != rawMode) {

return ThrowException(ErrnoException(GetLastError(), "EnableRawMode"));

}

return scope.Close(rawMode ? True() : False());

}

void Stdio::DisableRawMode(int fd) {

if (rawMode == 1)

setRawMode(0);

}

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

HandleScope scope;

setRawMode(0); // init into nonraw mode

return scope.Close(Integer::New(STDIN_FILENO));

}

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

// On windows stdin always blocks

return True();

}

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

// On windows stdout always blocks

return True();

}

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

HandleScope scope;

int fd, len;

DWORD written;

HANDLE handle;

if (!args[0]->IsNumber())

THROW_BAD_ARGS

fd = args[0]->IntegerValue();

handle = (HANDLE)_get_osfhandle(fd);

Handle<String> data = args[1]->ToString();

String::Value buf(data);

len = data->Length();

if (!WriteConsoleW(handle, reinterpret_cast<void*>(*buf), len, &written, NULL))

return ThrowException(ErrnoException(GetLastError(), "WriteConsole"));

return scope.Close(Integer::New(written));

}

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

HandleScope scope;

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

if (close(fd) < 0)

return ThrowException(ErrnoException(errno, "close"));

return Undefined();

}

// process.binding('stdio').getWindowSize(fd);

// returns [row, col]

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

HandleScope scope;

int fd;

HANDLE handle;

CONSOLE_SCREEN_BUFFER_INFO info;

if (!args[0]->IsNumber())

THROW_BAD_ARGS

fd = args[0]->IntegerValue();

handle = (HANDLE)_get_osfhandle(fd);

if (!GetConsoleScreenBufferInfo(handle, &info))

return ThrowException(ErrnoException(GetLastError(), "GetConsoleScreenBufferInfo"));

Local<Array> ret = Array::New(2);

ret->Set(0, Integer::New(static_cast<int>(info.dwSize.Y)));

ret->Set(1, Integer::New(static_cast<int>(info.dwSize.X)));

return scope.Close(ret);

}

/* moveCursor(fd, dx, dy) */

/* cursorTo(fd, x, y) */

template<bool relative>

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

HandleScope scope;

int fd;

COORD size, pos;

HANDLE handle;

CONSOLE_SCREEN_BUFFER_INFO info;

if (!args[0]->IsNumber())

THROW_BAD_ARGS

fd = args[0]->IntegerValue();

handle = (HANDLE)_get_osfhandle(fd);

if (!GetConsoleScreenBufferInfo(handle, &info))

return ThrowException(ErrnoException(GetLastError(), "GetConsoleScreenBufferInfo"));

pos = info.dwCursorPosition;

if (relative) {

if (args[1]->IsNumber())

pos.X += static_cast<short>(args[1]->Int32Value());

if (args[2]->IsNumber())

pos.Y += static_cast<short>(args[2]->Int32Value());

} else {

if (args[1]->IsNumber())

pos.X = static_cast<short>(args[1]->Int32Value());

if (args[2]->IsNumber())

pos.Y = static_cast<short>(args[2]->Int32Value());

}

size = info.dwSize;

if (pos.X >= size.X) pos.X = size.X - 1;

if (pos.X < 0) pos.X = 0;

if (pos.Y >= size.Y) pos.Y = size.Y - 1;

if (pos.Y < 0) pos.Y = 0;

if (!SetConsoleCursorPosition(handle, pos))

return ThrowException(ErrnoException(GetLastError(), "SetConsoleCursorPosition"));

return Undefined();

}

* ClearLine(fd, direction)

* direction:

* -1: from cursor leftward

* 0: entire line

* 1: from cursor to right

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

HandleScope scope;

int fd, dir;

short x1, x2, count;

WCHAR *buf;

COORD pos;

HANDLE handle;

CONSOLE_SCREEN_BUFFER_INFO info;

DWORD res, written, mode, oldmode;

if (!args[0]->IsNumber())

THROW_BAD_ARGS

fd = args[0]->IntegerValue();

handle = (HANDLE)_get_osfhandle(fd);

if (args[1]->IsNumber())

dir = args[1]->IntegerValue();

if (!GetConsoleScreenBufferInfo(handle, &info))

return ThrowException(ErrnoException(GetLastError(), "GetConsoleScreenBufferInfo"));

x1 = dir <= 0 ? 0 : info.dwCursorPosition.X;

x2 = dir >= 0 ? info.dwSize.X - 1: info.dwCursorPosition.X;

count = x2 - x1 + 1;

if (x1 != info.dwCursorPosition.X) {

pos.Y = info.dwCursorPosition.Y;

pos.X = x1;

if (!SetConsoleCursorPosition(handle, pos))

return ThrowException(ErrnoException(GetLastError(), "SetConsoleCursorPosition"));

}

if (!GetConsoleMode(handle, &oldmode))

return ThrowException(ErrnoException(GetLastError(), "GetConsoleMode"));

// Disable wrapping at eol because otherwise windows scrolls the console

// when clearing the last line of the console

mode = oldmode & ~ENABLE_WRAP_AT_EOL_OUTPUT;

if (!SetConsoleMode(handle, mode))

return ThrowException(ErrnoException(GetLastError(), "SetConsoleMode"));

buf = new WCHAR[count];

for (short i = 0; i < count; i++) {

buf[i] = L' ';

}

res = WriteConsoleW(handle, buf, count, &written, NULL);

delete[] buf;

if (!res)

return ThrowException(ErrnoException(GetLastError(), "WriteConsole"));

if (!SetConsoleCursorPosition(handle, info.dwCursorPosition))

return ThrowException(ErrnoException(GetLastError(), "SetConsoleCursorPosition"));

if (!SetConsoleMode(handle, oldmode))

return ThrowException(ErrnoException(GetLastError(), "SetConsoleMode"));

return Undefined();

}

/* TTY watcher data */

HANDLE tty_handle;

HANDLE tty_wait_handle;

void *tty_error_callback;

void *tty_keypress_callback;

void *tty_resize_callback;

static bool tty_watcher_initialized = false;

static bool tty_watcher_active = false;

static uv_async_t tty_avail_notifier;

static void CALLBACK tty_want_poll(void *context, BOOLEAN didTimeout) {

assert(!didTimeout);

uv_async_send(&tty_avail_notifier);

}

static void tty_watcher_arm() {

// Register a new wait handle before dropping the old one, because

// otherwise windows might destroy and recreate the wait thread.

// MSDN promises that thread pool threads are kept alive when they're idle,

// but apparently this does not apply to wait threads. Sigh.

HANDLE old_wait_handle = tty_wait_handle;

tty_wait_handle = NULL;

assert(tty_watcher_active);

if (!RegisterWaitForSingleObject(&tty_wait_handle, tty_handle, tty_want_poll, NULL,

INFINITE, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE)) {

ThrowException(ErrnoException(GetLastError(), "RegisterWaitForSingleObject"));

}

if (old_wait_handle != NULL) {

if (!UnregisterWait(old_wait_handle) && GetLastError() != ERROR_IO_PENDING)

ThrowException(ErrnoException(GetLastError(), "UnregisterWait"));

}

static void tty_watcher_disarm() {

DWORD result;

if (tty_wait_handle != NULL) {

result = UnregisterWait(tty_wait_handle);

tty_wait_handle = NULL;

if (!result && GetLastError() != ERROR_IO_PENDING)

ThrowException(ErrnoException(GetLastError(), "UnregisterWait"));

}

static void tty_watcher_start() {

assert(tty_watcher_initialized);

if (!tty_watcher_active) {

tty_watcher_active = true;

uv_ref(uv_default_loop());

tty_watcher_arm();

}

static void tty_watcher_stop() {

if (tty_watcher_active) {

tty_watcher_active = false;

uv_unref(uv_default_loop());

tty_watcher_disarm();

}

static inline void tty_emit_error(Handle<Value> err) {

HandleScope scope;

Handle<Object> global = v8::Context::GetCurrent()->Global();

Handle<Function> *handler = cb_unwrap(tty_error_callback);

Handle<Value> argv[1] = { err };

(*handler)->Call(global, 1, argv);

}

static void tty_poll(uv_async_t* handle, int status) {

assert(handle == &tty_avail_notifier);

assert(status == 0);

HandleScope scope;

TryCatch try_catch;

Handle<Object> global = v8::Context::GetCurrent()->Global();

Handle<Function> *callback;

INPUT_RECORD input;

KEY_EVENT_RECORD k;

const char *keyName;

DWORD i, j, numev, read;

Handle<Value> argv[2];

Handle<Object> key;

if (!GetNumberOfConsoleInputEvents(tty_handle, &numev)) {

tty_emit_error(ErrnoException(GetLastError(),

"GetNumberOfConsoleInputEvents"));

numev = 0;

}

for (i = numev; i > 0 &&

tty_watcher_active; i--) {

if (!ReadConsoleInputW(tty_handle, &input, 1, &read)) {

tty_emit_error(ErrnoException(GetLastError(), "ReadConsoleInputW"));

break;

}

switch (input.EventType) {

case KEY_EVENT:

// Skip if no callback set

if (!tty_keypress_callback)

break;

k = input.Event.KeyEvent;

// Ignore keyup

if (!k.bKeyDown)

break;

// Try to find a symbolic name for the key

keyName = (k.wVirtualKeyCode <= MAX_KEY)

? scancodes[k.wVirtualKeyCode]

: 0;

// The key must have a symbolic name or a char or both

if (k.uChar.UnicodeChar == 0 && keyName == 0)

break;

// Set the event name and character

argv[0] = k.uChar.UnicodeChar

? String::New(reinterpret_cast<uint16_t*>(&k.uChar.UnicodeChar), 1)

: Undefined();

// Set the key info, if any

if (keyName) {

key = Object::New();

key->Set(name_symbol, String::New(keyName));

key->Set(shift_symbol, Boolean::New(k.dwControlKeyState &

SHIFT_PRESSED));

key->Set(ctrl_symbol, Boolean::New(k.dwControlKeyState &

(LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)));

key->Set(meta_symbol, Boolean::New(k.dwControlKeyState &

(LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)));

argv[1] = key;

} else {

argv[1] = Undefined();

}

callback = cb_unwrap(tty_keypress_callback);

j = k.wRepeatCount;

do {

(*callback)->Call(global, 2, argv);

} while (--j > 0 && tty_watcher_active);

break;

case WINDOW_BUFFER_SIZE_EVENT:

if (!tty_resize_callback)

break;

callback = cb_unwrap(tty_resize_callback);

(*callback)->Call(global, 0, argv);

break;

}

// Rearm the watcher

if (tty_watcher_active) {

tty_watcher_arm();

}

// Emit fatal errors and unhandled error events

if (try_catch.HasCaught()) {

FatalException(try_catch);

}

/* StartTTYWatcher(fd, onError, onKeypress, onResize) */

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

HandleScope scope;

if (tty_watcher_initialized)

THROW_ERROR("TTY watcher already initialized")

if (!args[0]->IsNumber())

THROW_BAD_ARGS;

tty_handle = (HANDLE)_get_osfhandle(args[0]->IntegerValue());

if (!args[1]->IsFunction())

THROW_BAD_ARGS;

tty_error_callback = cb_persist(args[1]);

tty_keypress_callback = args[2]->IsFunction()

? cb_persist(args[2])

: NULL;

tty_resize_callback = args[3]->IsFunction()

? cb_persist(args[3])

: NULL;

tty_watcher_initialized = true;

tty_wait_handle = NULL;

return Undefined();

}

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

if (!tty_watcher_initialized)

THROW_ERROR("TTY watcher not initialized")

tty_watcher_stop();

if (tty_error_callback != NULL)

cb_destroy(cb_unwrap(tty_error_callback));

if (tty_keypress_callback != NULL)

cb_destroy(cb_unwrap(tty_keypress_callback));

if (tty_resize_callback != NULL)

cb_destroy(cb_unwrap(tty_resize_callback));

tty_watcher_initialized = false;

return Undefined();

}

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

if (!tty_watcher_initialized)

THROW_ERROR("TTY watcher not initialized")

tty_watcher_start();

return Undefined();

}

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

if (!tty_watcher_initialized)

THROW_ERROR("TTY watcher not initialized")

tty_watcher_stop();

return Undefined();

}

void Stdio::Initialize(v8::Handle<v8::Object> target) {

init_scancode_table();

uv_async_init(uv_default_loop(), &tty_avail_notifier, tty_poll);

uv_unref(uv_default_loop());

/* Set stdio streams to binary mode. */

_setmode(_fileno(stdin), _O_BINARY);

_setmode(_fileno(stdout), _O_BINARY);

_setmode(_fileno(stderr), _O_BINARY);

name_symbol = NODE_PSYMBOL("name");

shift_symbol = NODE_PSYMBOL("shift");

ctrl_symbol = NODE_PSYMBOL("ctrl");

meta_symbol = NODE_PSYMBOL("meta");

target->Set(String::NewSymbol("stdoutFD"), Integer::New(STDOUT_FILENO));

target->Set(String::NewSymbol("stderrFD"), Integer::New(STDERR_FILENO));

target->Set(String::NewSymbol("stdinFD"), Integer::New(STDIN_FILENO));

NODE_SET_METHOD(target, "writeError", WriteError);

NODE_SET_METHOD(target, "isatty", IsATTY);

NODE_SET_METHOD(target, "isStdoutBlocking", IsStdoutBlocking);

NODE_SET_METHOD(target, "isStdinBlocking", IsStdinBlocking);

NODE_SET_METHOD(target, "setRawMode", SetRawMode);

NODE_SET_METHOD(target, "openStdin", OpenStdin);

NODE_SET_METHOD(target, "writeTTY", WriteTTY);

NODE_SET_METHOD(target, "closeTTY", CloseTTY);

NODE_SET_METHOD(target, "moveCursor", SetCursor<true>);

NODE_SET_METHOD(target, "cursorTo", SetCursor<false>);

NODE_SET_METHOD(target, "clearLine", ClearLine);

NODE_SET_METHOD(target, "getWindowSize", GetWindowSize);

NODE_SET_METHOD(target, "initTTYWatcher", InitTTYWatcher);

NODE_SET_METHOD(target, "destroyTTYWatcher", DestroyTTYWatcher);

NODE_SET_METHOD(target, "startTTYWatcher", StartTTYWatcher);

NODE_SET_METHOD(target, "stopTTYWatcher", StopTTYWatcher);

}

} // namespace node

NODE_MODULE(node_stdio, node::Stdio::Initialize);

node/src/node_stdio_win32.cc at master · tmpvar/node · GitHub

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