A tool for get Virtual-Key Code of the pressed key

[neorobin]

Code: Select all

@echo off
setlocal enabledelayedexpansion

call :make "%~f0"

for /L %%a in () do (

    neoGetKey.exe 500 x

    set "err=!errorlevel!"
    if !err! equ 255 (echo;   time out) else echo;   pressed key value is : !err!
)

exit


:make
for /f "delims=:" %%a in ('findstr /n /i "^:BEGIN:getKEY.B64" "%~1"') do set "sk=%%a"

> getKEY.B64 cd.
     for /f "useback skip=%sk% delims=" %%f in ("%~1") do (
        if /i not "%%f"==":END:getKEY.B64" (>> getKEY.B64 echo;%%f) else (

            certutil -f -decode getKEY.B64 neoGetKey.exe
            exit /b
        )
    )
)

exit /b



neoGetKey.exe

aa77dd@163.com @ 20160907_122038

获取当前被按下的 按键 值, 支持全键盘按键, 以及鼠标 左 右 中键

参数说明:
    neoGetKey.exe timeout showMethod

    timeout         超时数, 单位 ms, 在运行超过此时间后自动退出, 并返回 255
                    如果 此项是 0  将一直等到检测到有键按下, 程序才会结束并返回键值.
                    如果 此项不存在, 最长将等到默认值 1000ms 后退出

    showMethod      返回值的显示方式, 此项为 D 以十进制显示, 此项为 X 以十六进制显示
                    如果此项不存在, 将不会显示返回值



::BEGIN:neoGetKey.C
#include <Windows.h>
#include <stdio.h>

int main(int argc, char** argv) {
    int i, t = 1000;
    char show = '\0';

    if (argc >= 2) t = atoi(argv[1]);

    if (argc >= 3) {
        show = (**(argv + 2) == 'x' || **(argv + 2) == 'X') ? 'x' : (**(argv + 2) == 'd' || **(argv + 2) == 'D') ? 'd' : '\0';
    }

    for (i = 0; t == 0 || i < t; i++) {
        int x;
        for (x = 1; x <= 254; x++)
            if (GetAsyncKeyState(x) & 0x8000) {
                if (show == 'x') printf("%x", x);
                if (show == 'd') printf("%d", x);
                return x;
            }
        sleep(1);
    }
    if (show == 'x') printf("%x", 255);
    if (show == 'd') printf("%d", 255);
    return 255;
}
::END:neoGetKey.C






:BEGIN:getKEY.B64
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
:END:getKEY.B64

[aGerman]

neorobin

Some suggestions
- 255 is a valid key code (https://msdn.microsoft.com/en-us/library/windows/desktop/dd375731). You should rather return 0 or some value greater than 255 as default.
- GetAsyncKeyState might have been easy to use but it is a global function that determines the key pressed even if the console window doesn't have the keyboard focus. Better use ReadConsoleInput (if you want to discard the input from stdin) or PeekConsoleInput (if you want to leave the input in stdin).
- Avoid ato... functions. You can't even differentiate 0 from an invalid argument. Better use strto... functions.
- You could use a thread function together with WaitForSingleObject in order to have a more accurate time out.

C / Windows API

Code: Select all

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <process.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

typedef struct tagTHREADARG
{
  CRITICAL_SECTION mtx;
  HANDLE hStdin;
  INPUT_RECORD *inRec;
  int virtKeyCode;
} THREADARG;

unsigned __stdcall WaitForKeyEvent(void *ptr)
{
  THREADARG *pArg = (THREADARG*)ptr;
  DWORD NumEvents = 0, NumEventsRead = 0;
  BOOL success = FALSE;

  for (;;)
  {
    EnterCriticalSection(&pArg->mtx);
    GetNumberOfConsoleInputEvents(pArg->hStdin, &NumEvents);
    pArg->inRec = (INPUT_RECORD*)malloc(sizeof(INPUT_RECORD) * NumEvents);
    LeaveCriticalSection(&pArg->mtx);
    if (pArg->inRec == NULL)
      _endthreadex(0);

    EnterCriticalSection(&pArg->mtx);
    success = PeekConsoleInputA(pArg->hStdin, pArg->inRec, NumEvents, &NumEventsRead);
    LeaveCriticalSection(&pArg->mtx);

    if (success)
    {
      for(DWORD i = 0; i < NumEventsRead; ++i)
      {
        EnterCriticalSection(&pArg->mtx);
        if (pArg->inRec[i].EventType == KEY_EVENT && pArg->inRec[i].Event.KeyEvent.bKeyDown)
        {
          pArg->virtKeyCode = pArg->inRec[i].Event.KeyEvent.wVirtualKeyCode;
          free(pArg->inRec);
          pArg->inRec = NULL;
          LeaveCriticalSection(&pArg->mtx);
          _endthreadex(0);
        }
        LeaveCriticalSection(&pArg->mtx);
      }
    }
    EnterCriticalSection(&pArg->mtx);
    free(pArg->inRec);
    pArg->inRec = NULL;
    LeaveCriticalSection(&pArg->mtx);
  }
  return 0;
}

int main(int argc, char *argv[])
{
  THREADARG threadarg = {0};
  if ((threadarg.hStdin = GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE)
    return 256;

  DWORD t = 1000;
  if (argc > 1)
  {
    char *endptr = NULL;
    errno = 0;
    long l = strtol(argv[1], &endptr, 0);
    if (*endptr == 0 && errno == 0)
    {
      if (l > 0)
        t = l;
      else if (l == 0)
        t = INFINITE;
    }
  }

  InitializeCriticalSection(&threadarg.mtx);

  HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, WaitForKeyEvent, (void*)&threadarg, 0, NULL);
  DWORD ret = WaitForSingleObject(hThread, t);
  CloseHandle(hThread);

  EnterCriticalSection(&threadarg.mtx);

  if (threadarg.inRec)
    free(threadarg.inRec);

  if (ret == WAIT_TIMEOUT || threadarg.virtKeyCode == 0)
    threadarg.virtKeyCode = 256;

  if (argc > 2)
  {
    if (_stricmp(argv[2], "x") == 0)
      printf("%x\n", threadarg.virtKeyCode);
    else if (_stricmp(argv[2], "d") == 0)
      printf("%d\n", threadarg.virtKeyCode);
  }

  return threadarg.virtKeyCode;
}

Steffen

[neorobin]

Thanks for aGerman!

I do not understand those API functions deeply.
I just do some rough code to achieve my purpose.