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Add method to flush console input buffer

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svn path=/trunk/; revision=30067
This commit is contained in:
Hervé Poussineau 2007-11-02 12:37:50 +00:00
parent 426db02b5b
commit 4885fbac2a
1 changed files with 48 additions and 8 deletions
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56
reactos/base/setup/usetup/native/utils/console.c
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@ -57,7 +57,7 @@ AllocConsole(VOID)
FILE_ALL_ACCESS,
&ObjectAttributes,
&IoStatusBlock,
0,
FILE_OPEN,
FILE_SYNCHRONOUS_IO_ALERT);
if (!NT_SUCCESS(Status))
return FALSE;
@ -74,8 +74,8 @@ AllocConsole(VOID)
FILE_ALL_ACCESS,
&ObjectAttributes,
&IoStatusBlock,
0,
FILE_SYNCHRONOUS_IO_ALERT);
FILE_OPEN,
0);
if (!NT_SUCCESS(Status))
return FALSE;
@ -92,15 +92,12 @@ AttachConsole(
BOOL WINAPI
FreeConsole(VOID)
{
DPRINT("FreeConsole() called\n");
if (StdInput != INVALID_HANDLE_VALUE)
NtClose(StdInput);
if (StdOutput != INVALID_HANDLE_VALUE)
NtClose(StdOutput);
DPRINT("FreeConsole() done\n");
return TRUE;
}
@ -147,6 +144,42 @@ GetStdHandle(
}
}
BOOL WINAPI
FlushConsoleInputBuffer(
IN HANDLE hConsoleInput)
{
LARGE_INTEGER Offset, Timeout;
IO_STATUS_BLOCK IoStatusBlock;
KEYBOARD_INPUT_DATA InputData;
NTSTATUS Status;
do
{
Offset.QuadPart = 0;
Status = NtReadFile(
hConsoleInput,
NULL,
NULL,
NULL,
&IoStatusBlock,
&InputData,
sizeof(KEYBOARD_INPUT_DATA),
&Offset,
0);
if (Status == STATUS_PENDING)
{
Timeout.QuadPart = -100;
Status = NtWaitForSingleObject(hConsoleInput, FALSE, &Timeout);
if (Status == STATUS_TIMEOUT)
{
NtCancelIoFile(hConsoleInput, &IoStatusBlock);
return TRUE;
}
}
} while (NT_SUCCESS(Status));
return FALSE;
}
BOOL WINAPI
ReadConsoleInput(
IN HANDLE hConsoleInput,
@ -154,11 +187,12 @@ ReadConsoleInput(
IN DWORD nLength,
OUT LPDWORD lpNumberOfEventsRead)
{
LARGE_INTEGER Offset;
IO_STATUS_BLOCK IoStatusBlock;
KEYBOARD_INPUT_DATA InputData;
NTSTATUS Status;
lpBuffer->EventType = KEY_EVENT;
Offset.QuadPart = 0;
Status = NtReadFile(
hConsoleInput,
NULL,
@ -167,11 +201,17 @@ ReadConsoleInput(
&IoStatusBlock,
&InputData,
sizeof(KEYBOARD_INPUT_DATA),
NULL,
&Offset,
0);
if (Status == STATUS_PENDING)
{
Status = NtWaitForSingleObject(hConsoleInput, FALSE, NULL);
Status = IoStatusBlock.Status;
}
if (!NT_SUCCESS(Status))
return FALSE;
lpBuffer->EventType = KEY_EVENT;
Status = IntTranslateKey(&InputData, &lpBuffer->Event.KeyEvent);
if (!NT_SUCCESS(Status))
return FALSE;