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circuitpython/windows/windows_mphal.c

229 lines
6.9 KiB

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Damien P. George
*
* 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 "py/mpstate.h"
#include "py/mphal.h"
#include <sys/time.h>
#include <windows.h>
#include <unistd.h>
HANDLE std_in = NULL;
HANDLE con_out = NULL;
DWORD orig_mode = 0;
STATIC void assure_stdin_handle() {
if (!std_in) {
std_in = GetStdHandle(STD_INPUT_HANDLE);
assert(std_in != INVALID_HANDLE_VALUE);
}
}
STATIC void assure_conout_handle() {
if (!con_out) {
con_out = CreateFile("CONOUT$", GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, 0);
assert(con_out != INVALID_HANDLE_VALUE);
}
}
void mp_hal_stdio_mode_raw(void) {
assure_stdin_handle();
GetConsoleMode(std_in, &orig_mode);
DWORD mode = orig_mode;
mode &= ~ENABLE_ECHO_INPUT;
mode &= ~ENABLE_LINE_INPUT;
mode &= ~ENABLE_PROCESSED_INPUT;
SetConsoleMode(std_in, mode);
}
void mp_hal_stdio_mode_orig(void) {
assure_stdin_handle();
SetConsoleMode(std_in, orig_mode);
}
// Handler to be installed by SetConsoleCtrlHandler, currently used only to handle Ctrl-C.
// This handler has to be installed just once (this has to be done elswhere in init code).
// Previous versions of the mp_hal code would install a handler whenever Ctrl-C input is
// allowed and remove the handler again when it is not. That is not necessary though (1),
// and it might introduce problems (2) because console notifications are delivered to the
// application in a separate thread.
// (1) mp_hal_set_interrupt_char effectively enables/disables processing of Ctrl-C via the
// ENABLE_PROCESSED_INPUT flag so in raw mode console_sighandler won't be called.
// (2) if mp_hal_set_interrupt_char would remove the handler while Ctrl-C was issued earlier,
// the thread created for handling it might not be running yet so we'd miss the notification.
BOOL WINAPI console_sighandler(DWORD evt) {
if (evt == CTRL_C_EVENT) {
if (MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception))) {
// this is the second time we are called, so die straight away
exit(1);
}
mp_obj_exception_clear_traceback(MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception)));
MP_STATE_VM(mp_pending_exception) = MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception));
return TRUE;
}
return FALSE;
}
void mp_hal_set_interrupt_char(char c) {
assure_stdin_handle();
if (c == CHAR_CTRL_C) {
DWORD mode;
GetConsoleMode(std_in, &mode);
mode |= ENABLE_PROCESSED_INPUT;
SetConsoleMode(std_in, mode);
} else {
DWORD mode;
GetConsoleMode(std_in, &mode);
mode &= ~ENABLE_PROCESSED_INPUT;
SetConsoleMode(std_in, mode);
}
}
void mp_hal_move_cursor_back(uint pos) {
assure_conout_handle();
CONSOLE_SCREEN_BUFFER_INFO info;
GetConsoleScreenBufferInfo(con_out, &info);
info.dwCursorPosition.X -= (short)pos;
if (info.dwCursorPosition.X < 0) {
info.dwCursorPosition.X = 0;
}
SetConsoleCursorPosition(con_out, info.dwCursorPosition);
}
void mp_hal_erase_line_from_cursor(uint n_chars_to_erase) {
assure_conout_handle();
CONSOLE_SCREEN_BUFFER_INFO info;
GetConsoleScreenBufferInfo(con_out, &info);
DWORD written;
FillConsoleOutputCharacter(con_out, ' ', n_chars_to_erase, info.dwCursorPosition, &written);
FillConsoleOutputAttribute(con_out, info.wAttributes, n_chars_to_erase, info.dwCursorPosition, &written);
}
typedef struct item_t {
WORD vkey;
const char *seq;
} item_t;
// map virtual key codes to VT100 escape sequences
STATIC item_t keyCodeMap[] = {
{VK_UP, "[A"},
{VK_DOWN, "[B"},
{VK_RIGHT, "[C"},
{VK_LEFT, "[D"},
{VK_HOME, "[H"},
{VK_END, "[F"},
{VK_DELETE, "[3~"},
{0, ""} //sentinel
};
STATIC const char *cur_esc_seq = NULL;
STATIC int esc_seq_process_vk(int vk) {
for (item_t *p = keyCodeMap; p->vkey != 0; ++p) {
if (p->vkey == vk) {
cur_esc_seq = p->seq;
return 27; // ESC, start of escape sequence
}
}
return 0; // nothing found
}
STATIC int esc_seq_chr() {
if (cur_esc_seq) {
const char c = *cur_esc_seq++;
if (c) {
return c;
}
cur_esc_seq = NULL;
}
return 0;
}
int mp_hal_stdin_rx_chr(void) {
// currently processing escape seq?
const int ret = esc_seq_chr();
if (ret) {
return ret;
}
// poll until key which we handle is pressed
assure_stdin_handle();
DWORD num_read;
INPUT_RECORD rec;
for (;;) {
if (!ReadConsoleInput(std_in, &rec, 1, &num_read) || !num_read) {
return CHAR_CTRL_C; // EOF, ctrl-D
}
if (rec.EventType != KEY_EVENT || !rec.Event.KeyEvent.bKeyDown) { // only want key down events
continue;
}
const char c = rec.Event.KeyEvent.uChar.AsciiChar;
if (c) { // plain ascii char, return it
return c;
}
const int ret = esc_seq_process_vk(rec.Event.KeyEvent.wVirtualKeyCode);
if (ret) {
return ret;
}
}
}
void mp_hal_stdout_tx_strn(const char *str, size_t len) {
write(1, str, len);
}
void mp_hal_stdout_tx_strn_cooked(const char *str, size_t len) {
mp_hal_stdout_tx_strn(str, len);
}
void mp_hal_stdout_tx_str(const char *str) {
mp_hal_stdout_tx_strn(str, strlen(str));
}
mp_uint_t mp_hal_ticks_ms(void) {
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
mp_uint_t mp_hal_ticks_us(void) {
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000000 + tv.tv_usec;
}
mp_uint_t mp_hal_ticks_cpu(void) {
LARGE_INTEGER value;
QueryPerformanceCounter(&value);
#ifdef _WIN64
return value.QuadPart;
#else
return value.LowPart;
#endif
}