ports: Make new ports/ sub-directory and move all ports there.

This is to keep the top-level directory clean, to make it clear what is
core and what is a port, and to allow the repository to grow with new ports
in a sustainable way.

ports/windows/windows_mphal.c

@@ -0,0 +1,229 @@
+/*
+ * This file is part of the MicroPython 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
+}