413 lines
13 KiB
C
413 lines
13 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stm32f4xx_hal.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "misc.h"
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#include "lexer.h"
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#include "parse.h"
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#include "obj.h"
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#include "parsehelper.h"
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#include "compile.h"
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#include "runtime.h"
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#include "repl.h"
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#include "gc.h"
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#include "gccollect.h"
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#include "systick.h"
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#include "pyexec.h"
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#if 0
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#include "storage.h"
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#endif
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#include "usb.h"
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#include "usart.h"
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static bool repl_display_debugging_info = 0;
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void stdout_tx_str(const char *str) {
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if (pyb_usart_global_debug != PYB_USART_NONE) {
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usart_tx_str(pyb_usart_global_debug, str);
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}
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#if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
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lcd_print_str(str);
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#endif
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usb_vcp_send_str(str);
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}
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void stdout_tx_strn(const char *str, uint len) {
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if (pyb_usart_global_debug != PYB_USART_NONE) {
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usart_tx_strn(pyb_usart_global_debug, str, len);
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}
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#if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
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lcd_print_strn(str, len);
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#endif
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usb_vcp_send_strn(str, len);
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}
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int stdin_rx_chr(void) {
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for (;;) {
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#if 0
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#ifdef USE_HOST_MODE
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pyb_usb_host_process();
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int c = pyb_usb_host_get_keyboard();
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if (c != 0) {
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return c;
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}
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#endif
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#endif
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if (usb_vcp_rx_num() != 0) {
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return usb_vcp_rx_get();
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} else if (pyb_usart_global_debug != PYB_USART_NONE && usart_rx_any(pyb_usart_global_debug)) {
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return usart_rx_char(pyb_usart_global_debug);
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}
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HAL_Delay(1);
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#if 0
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if (storage_needs_flush()) {
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storage_flush();
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}
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#endif
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}
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}
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char *str_dup(const char *str) {
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uint32_t len = strlen(str);
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char *s2 = m_new(char, len + 1);
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memcpy(s2, str, len);
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s2[len] = 0;
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return s2;
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}
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#define READLINE_HIST_SIZE (8)
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static const char *readline_hist[READLINE_HIST_SIZE] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
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int readline(vstr_t *line, const char *prompt) {
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stdout_tx_str(prompt);
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int orig_line_len = line->len;
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int escape_seq = 0;
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int hist_cur = -1;
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int cursor_pos = orig_line_len;
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for (;;) {
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int c = stdin_rx_chr();
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int last_line_len = line->len;
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int redraw_step_back = 0;
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bool redraw_from_cursor = false;
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int redraw_step_forward = 0;
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if (escape_seq == 0) {
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if (VCP_CHAR_CTRL_A <= c && c <= VCP_CHAR_CTRL_D && vstr_len(line) == orig_line_len) {
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// control character with empty line
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return c;
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} else if (c == '\r') {
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// newline
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stdout_tx_str("\r\n");
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if (line->len > orig_line_len && (readline_hist[0] == NULL || strcmp(readline_hist[0], line->buf + orig_line_len) != 0)) {
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// a line which is not empty and different from the last one
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// so update the history
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for (int i = READLINE_HIST_SIZE - 1; i > 0; i--) {
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readline_hist[i] = readline_hist[i - 1];
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}
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readline_hist[0] = str_dup(line->buf + orig_line_len);
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}
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return 0;
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} else if (c == 27) {
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// escape sequence
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escape_seq = 1;
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} else if (c == 127) {
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// backspace
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if (cursor_pos > orig_line_len) {
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vstr_cut_out_bytes(line, cursor_pos - 1, 1);
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// set redraw parameters
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redraw_step_back = 1;
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redraw_from_cursor = true;
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}
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} else if (32 <= c && c <= 126) {
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// printable character
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vstr_ins_char(line, cursor_pos, c);
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// set redraw parameters
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redraw_from_cursor = true;
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redraw_step_forward = 1;
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}
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} else if (escape_seq == 1) {
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if (c == '[') {
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escape_seq = 2;
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} else {
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escape_seq = 0;
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}
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} else if (escape_seq == 2) {
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escape_seq = 0;
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if (c == 'A') {
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// up arrow
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if (hist_cur + 1 < READLINE_HIST_SIZE && readline_hist[hist_cur + 1] != NULL) {
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// increase hist num
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hist_cur += 1;
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// set line to history
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line->len = orig_line_len;
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vstr_add_str(line, readline_hist[hist_cur]);
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// set redraw parameters
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redraw_step_back = cursor_pos - orig_line_len;
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redraw_from_cursor = true;
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redraw_step_forward = line->len - orig_line_len;
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}
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} else if (c == 'B') {
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// down arrow
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if (hist_cur >= 0) {
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// decrease hist num
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hist_cur -= 1;
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// set line to history
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vstr_cut_tail_bytes(line, line->len - orig_line_len);
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if (hist_cur >= 0) {
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vstr_add_str(line, readline_hist[hist_cur]);
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}
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// set redraw parameters
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redraw_step_back = cursor_pos - orig_line_len;
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redraw_from_cursor = true;
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redraw_step_forward = line->len - orig_line_len;
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}
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} else if (c == 'C') {
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// right arrow
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if (cursor_pos < line->len) {
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redraw_step_forward = 1;
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}
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} else if (c == 'D') {
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// left arrow
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if (cursor_pos > orig_line_len) {
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redraw_step_back = 1;
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}
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}
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} else {
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escape_seq = 0;
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}
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// redraw command prompt, efficiently
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if (redraw_step_back > 0) {
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for (int i = 0; i < redraw_step_back; i++) {
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stdout_tx_str("\b");
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}
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cursor_pos -= redraw_step_back;
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}
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if (redraw_from_cursor) {
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if (line->len < last_line_len) {
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// erase old chars
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for (int i = cursor_pos; i < last_line_len; i++) {
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stdout_tx_str(" ");
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}
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// step back
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for (int i = cursor_pos; i < last_line_len; i++) {
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stdout_tx_str("\b");
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}
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}
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// draw new chars
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stdout_tx_strn(line->buf + cursor_pos, line->len - cursor_pos);
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// move cursor forward if needed (already moved forward by length of line, so move it back)
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for (int i = cursor_pos + redraw_step_forward; i < line->len; i++) {
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stdout_tx_str("\b");
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}
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cursor_pos += redraw_step_forward;
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} else if (redraw_step_forward > 0) {
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// draw over old chars to move cursor forwards
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stdout_tx_strn(line->buf + cursor_pos, redraw_step_forward);
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cursor_pos += redraw_step_forward;
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}
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HAL_Delay(1);
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}
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}
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// parses, compiles and executes the code in the lexer
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// frees the lexer before returning
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bool parse_compile_execute(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, bool is_repl) {
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mp_parse_error_kind_t parse_error_kind;
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mp_parse_node_t pn = mp_parse(lex, input_kind, &parse_error_kind);
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qstr source_name = mp_lexer_source_name(lex);
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if (pn == MP_PARSE_NODE_NULL) {
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// parse error
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mp_parse_show_exception(lex, parse_error_kind);
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mp_lexer_free(lex);
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return false;
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}
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mp_lexer_free(lex);
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mp_obj_t module_fun = mp_compile(pn, source_name, is_repl);
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mp_parse_node_free(pn);
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if (module_fun == mp_const_none) {
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return false;
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}
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nlr_buf_t nlr;
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bool ret;
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uint32_t start = HAL_GetTick();
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if (nlr_push(&nlr) == 0) {
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usb_vcp_set_interrupt_char(VCP_CHAR_CTRL_C); // allow ctrl-C to interrupt us
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rt_call_function_0(module_fun);
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usb_vcp_set_interrupt_char(VCP_CHAR_NONE); // disable interrupt
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nlr_pop();
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ret = true;
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} else {
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// uncaught exception
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// FIXME it could be that an interrupt happens just before we disable it here
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usb_vcp_set_interrupt_char(VCP_CHAR_NONE); // disable interrupt
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mp_obj_print_exception((mp_obj_t)nlr.ret_val);
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ret = false;
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}
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// display debugging info if wanted
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if (is_repl && repl_display_debugging_info) {
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uint32_t ticks = HAL_GetTick() - start; // TODO implement a function that does this properly
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printf("took %lu ms\n", ticks);
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gc_collect();
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// qstr info
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{
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uint n_pool, n_qstr, n_str_data_bytes, n_total_bytes;
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qstr_pool_info(&n_pool, &n_qstr, &n_str_data_bytes, &n_total_bytes);
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printf("qstr:\n n_pool=%u\n n_qstr=%u\n n_str_data_bytes=%u\n n_total_bytes=%u\n", n_pool, n_qstr, n_str_data_bytes, n_total_bytes);
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}
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// GC info
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{
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gc_info_t info;
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gc_info(&info);
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printf("GC:\n");
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printf(" %lu total\n", info.total);
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printf(" %lu : %lu\n", info.used, info.free);
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printf(" 1=%lu 2=%lu m=%lu\n", info.num_1block, info.num_2block, info.max_block);
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}
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}
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return ret;
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}
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void pyexec_raw_repl(void) {
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vstr_t line;
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vstr_init(&line, 32);
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raw_repl_reset:
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stdout_tx_str("raw REPL; CTRL-C to exit\r\n");
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for (;;) {
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vstr_reset(&line);
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stdout_tx_str(">");
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for (;;) {
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char c = stdin_rx_chr();
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if (c == VCP_CHAR_CTRL_A) {
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goto raw_repl_reset;
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} else if (c == VCP_CHAR_CTRL_C) {
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vstr_reset(&line);
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break;
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} else if (c == VCP_CHAR_CTRL_D) {
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break;
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} else if (c == '\r') {
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vstr_add_char(&line, '\n');
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} else if (32 <= c && c <= 126) {
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vstr_add_char(&line, c);
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}
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}
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stdout_tx_str("OK");
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if (vstr_len(&line) == 0) {
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// finished
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break;
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}
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mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&line), vstr_len(&line), 0);
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parse_compile_execute(lex, MP_PARSE_FILE_INPUT, false);
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stdout_tx_str("\004");
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}
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vstr_clear(&line);
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stdout_tx_str("\r\n");
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}
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void pyexec_repl(void) {
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#if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
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// in host mode, we enable the LCD for the repl
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mp_obj_t lcd_o = rt_call_function_0(rt_load_name(qstr_from_str("LCD")));
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rt_call_function_1(rt_load_attr(lcd_o, qstr_from_str("light")), mp_const_true);
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#endif
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stdout_tx_str("Micro Python build <git hash> on 25/1/2014; " MICROPY_HW_BOARD_NAME " with STM32F405RG\r\n");
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stdout_tx_str("Type \"help()\" for more information.\r\n");
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// to test ctrl-C
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/*
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{
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uint32_t x[4] = {0x424242, 0xdeaddead, 0x242424, 0xdeadbeef};
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for (;;) {
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nlr_buf_t nlr;
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printf("pyexec_repl: %p\n", x);
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usb_vcp_set_interrupt_char(VCP_CHAR_CTRL_C);
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if (nlr_push(&nlr) == 0) {
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for (;;) {
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}
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} else {
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printf("break\n");
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}
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}
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}
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*/
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vstr_t line;
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vstr_init(&line, 32);
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for (;;) {
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vstr_reset(&line);
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int ret = readline(&line, ">>> ");
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if (ret == VCP_CHAR_CTRL_A) {
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pyexec_raw_repl();
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continue;
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} else if (ret == VCP_CHAR_CTRL_C) {
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stdout_tx_str("\r\n");
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continue;
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} else if (ret == VCP_CHAR_CTRL_D) {
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// EOF
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break;
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} else if (vstr_len(&line) == 0) {
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continue;
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}
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if (mp_repl_is_compound_stmt(vstr_str(&line))) {
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for (;;) {
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vstr_add_char(&line, '\n');
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int len = vstr_len(&line);
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int ret = readline(&line, "... ");
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if (ret == VCP_CHAR_CTRL_D || vstr_len(&line) == len) {
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// done entering compound statement
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break;
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}
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}
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}
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mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&line), vstr_len(&line), 0);
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parse_compile_execute(lex, MP_PARSE_SINGLE_INPUT, true);
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}
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stdout_tx_str("\r\n");
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}
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bool pyexec_file(const char *filename) {
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mp_lexer_t *lex = mp_lexer_new_from_file(filename);
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if (lex == NULL) {
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printf("could not open file '%s' for reading\n", filename);
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return false;
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}
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return parse_compile_execute(lex, MP_PARSE_FILE_INPUT, false);
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}
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mp_obj_t pyb_set_repl_info(mp_obj_t o_value) {
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repl_display_debugging_info = mp_obj_get_int(o_value);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(pyb_set_repl_info_obj, pyb_set_repl_info);
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