--- /dev/null
+// This file is Copyright (c) 2020 Franck Jullien <franck.jullien@gmail.com>
+//
+// Largely inspired/copied from U-boot and Barebox projects wich are:
+// Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+// Sascha Hauer, Pengutronix, <s.hauer@pengutronix.de>
+// cmdline-editing related codes from vivi
+// Author: Janghoon Lyu <nandy@mizi.com>
+
+// SPDX-License-Identifier: BSD-Source-Code
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#include <console.h>
+#include <uart.h>
+
+#include "readline.h"
+
+#ifndef TERM_NO_HIST
+static int hist_max = 0;
+static int hist_add_idx = 0;
+static int hist_cur = 0;
+static int hist_num = 0;
+static char hist_lines[HIST_MAX][CMD_LINE_BUFFER_SIZE];
+#endif
+
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
+
+static const struct esc_cmds esccmds[] = {
+ {"OA", KEY_UP}, // cursor key Up
+ {"OB", KEY_DOWN}, // cursor key Down
+ {"OC", KEY_RIGHT}, // Cursor Key Right
+ {"OD", KEY_LEFT}, // cursor key Left
+ {"OH", KEY_HOME}, // Cursor Key Home
+ {"OF", KEY_END}, // Cursor Key End
+ {"[A", KEY_UP}, // cursor key Up
+ {"[B", KEY_DOWN}, // cursor key Down
+ {"[C", KEY_RIGHT}, // Cursor Key Right
+ {"[D", KEY_LEFT}, // cursor key Left
+ {"[H", KEY_HOME}, // Cursor Key Home
+ {"[F", KEY_END}, // Cursor Key End
+ {"[1~", KEY_HOME}, // Cursor Key Home
+ {"[2~", KEY_INSERT}, // Cursor Key Insert
+ {"[3~", KEY_DEL}, // Cursor Key Delete
+ {"[4~", KEY_END}, // Cursor Key End
+ {"[5~", KEY_PAGEUP}, // Cursor Key Page Up
+ {"[6~", KEY_PAGEDOWN},// Cursor Key Page Down
+};
+
+static int read_key(void)
+{
+ char c;
+ char esc[5];
+ c = readchar();
+
+ if (c == 27) {
+ int i = 0;
+ esc[i++] = readchar();
+ esc[i++] = readchar();
+ if (isdigit(esc[1])) {
+ while(1) {
+ esc[i] = readchar();
+ if (esc[i++] == '~')
+ break;
+ if (i == ARRAY_SIZE(esc))
+ return -1;
+ }
+ }
+ esc[i] = 0;
+ for (i = 0; i < ARRAY_SIZE(esccmds); i++){
+ if (!strcmp(esc, esccmds[i].seq))
+ return esccmds[i].val;
+ }
+ return -1;
+ }
+ return c;
+}
+
+#ifndef TERM_NO_HIST
+static void cread_add_to_hist(char *line)
+{
+ strcpy(&hist_lines[hist_add_idx][0], line);
+
+ if (++hist_add_idx >= HIST_MAX)
+ hist_add_idx = 0;
+
+ if (hist_add_idx > hist_max)
+ hist_max = hist_add_idx;
+
+ hist_num++;
+}
+
+static char* hist_prev(void)
+{
+ char *ret;
+ int old_cur;
+
+ if (hist_cur < 0)
+ return NULL;
+
+ old_cur = hist_cur;
+ if (--hist_cur < 0)
+ hist_cur = hist_max;
+
+ if (hist_cur == hist_add_idx) {
+ hist_cur = old_cur;
+ ret = NULL;
+ } else {
+ ret = &hist_lines[hist_cur][0];
+ }
+
+ return ret;
+}
+
+static char* hist_next(void)
+{
+ char *ret;
+
+ if (hist_cur < 0)
+ return NULL;
+
+ if (hist_cur == hist_add_idx)
+ return NULL;
+
+ if (++hist_cur > hist_max)
+ hist_cur = 0;
+
+ if (hist_cur == hist_add_idx)
+ ret = "";
+ else
+ ret = &hist_lines[hist_cur][0];
+
+ return ret;
+}
+
+void hist_init(void)
+{
+ int i;
+
+ hist_max = 0;
+ hist_add_idx = 0;
+ hist_cur = -1;
+ hist_num = 0;
+
+ for (i = 0; i < HIST_MAX; i++)
+ hist_lines[i][0] = '\0';
+}
+#endif
+
+static void cread_add_char(char ichar, int insert, unsigned long *num,
+ unsigned long *eol_num, char *buf, unsigned long len)
+{
+ unsigned long wlen;
+
+ if (insert || *num == *eol_num) {
+ if (*eol_num > len - 1) {
+ getcmd_cbeep();
+ return;
+ }
+ (*eol_num)++;
+ }
+
+ if (insert) {
+ wlen = *eol_num - *num;
+ if (wlen > 1) {
+ memmove(&buf[*num+1], &buf[*num], wlen-1);
+ }
+
+ buf[*num] = ichar;
+ putnstr(buf + *num, wlen);
+ (*num)++;
+ while (--wlen) {
+ getcmd_putch(CTL_BACKSPACE);
+ }
+ } else {
+ /* echo the character */
+ wlen = 1;
+ buf[*num] = ichar;
+ putnstr(buf + *num, wlen);
+ (*num)++;
+ }
+}
+
+int readline(char *buf, int len)
+{
+ unsigned long num = 0;
+ unsigned long eol_num = 0;
+ unsigned long wlen;
+ int insert = 1;
+ char ichar;
+
+ while (1) {
+
+ ichar = read_key();
+
+ if ((ichar == '\n') || (ichar == '\r'))
+ break;
+
+ switch (ichar) {
+ case '\t':
+ break;
+
+ case KEY_HOME:
+ BEGINNING_OF_LINE();
+ break;
+ case CTL_CH('c'): /* ^C - break */
+ *buf = 0; /* discard input */
+ return -1;
+ break;
+ case KEY_RIGHT:
+ if (num < eol_num) {
+ getcmd_putch(buf[num]);
+ num++;
+ }
+ break;
+ case KEY_LEFT:
+ if (num) {
+ getcmd_putch(CTL_BACKSPACE);
+ num--;
+ }
+ break;
+ case CTL_CH('d'):
+ if (num < eol_num) {
+ wlen = eol_num - num - 1;
+ if (wlen) {
+ memmove(&buf[num], &buf[num+1], wlen);
+ putnstr(buf + num, (int)wlen);
+ }
+
+ getcmd_putch(' ');
+ do {
+ getcmd_putch(CTL_BACKSPACE);
+ } while (wlen--);
+ eol_num--;
+ }
+ break;
+ case KEY_ERASE_TO_EOL:
+ ERASE_TO_EOL();
+ break;
+ case KEY_REFRESH_TO_EOL:
+ case KEY_END:
+ REFRESH_TO_EOL();
+ break;
+ case KEY_INSERT:
+ insert = !insert;
+ break;
+ case KEY_ERASE_LINE:
+ BEGINNING_OF_LINE();
+ ERASE_TO_EOL();
+ break;
+ case DEL:
+ case KEY_DEL7:
+ case 8:
+ if (num) {
+ wlen = eol_num - num;
+ num--;
+ memmove(buf + num, buf + num + 1, wlen);
+ getcmd_putch(CTL_BACKSPACE);
+ putnstr(buf + num, (int)wlen);
+ getcmd_putch(' ');
+ do {
+ getcmd_putch(CTL_BACKSPACE);
+ } while (wlen--);
+ eol_num--;
+ }
+ break;
+ case KEY_DEL:
+ if (num < eol_num) {
+ wlen = eol_num - num;
+ memmove(buf + num, buf + num + 1, wlen);
+ putnstr(buf + num, (int)(wlen - 1));
+ getcmd_putch(' ');
+ do {
+ getcmd_putch(CTL_BACKSPACE);
+ } while (--wlen);
+ eol_num--;
+ }
+ break;
+ case KEY_UP:
+ case KEY_DOWN:
+ {
+#ifndef TERM_NO_HIST
+ char * hline;
+ if (ichar == KEY_UP)
+ hline = hist_prev();
+ else
+ hline = hist_next();
+
+ if (!hline) {
+ getcmd_cbeep();
+ break;
+ }
+
+ /* nuke the current line */
+ /* first, go home */
+ BEGINNING_OF_LINE();
+
+ /* erase to end of line */
+ ERASE_TO_EOL();
+
+ /* copy new line into place and display */
+ strcpy(buf, hline);
+ eol_num = strlen(buf);
+ REFRESH_TO_EOL();
+#endif
+ break;
+ }
+
+ default:
+ if (isascii(ichar) && isprint(ichar))
+ cread_add_char (ichar, insert, &num, &eol_num, buf, len);
+ break;
+ }
+ }
+
+ len = eol_num;
+ buf[eol_num] = '\0';
+
+#ifndef TERM_NO_HIST
+ if (buf[0] && buf[0] != CREAD_HIST_CHAR)
+ cread_add_to_hist(buf);
+ hist_cur = hist_add_idx;
+#endif
+
+ num = 0;
+ eol_num = 0;
+
+ return len;
+}
--- /dev/null
+#ifndef __READLINE_H__
+#define __READLINE_H__
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#define CMD_LINE_BUFFER_SIZE 64
+
+#define PROMPT "\e[92;1mlitex\e[0m> "
+
+#define ESC 27
+
+struct esc_cmds {
+ const char *seq;
+ char val;
+};
+
+#define CTL_CH(c) ((c) - 'a' + 1)
+
+/* Misc. non-Ascii keys */
+#define KEY_UP CTL_CH('p') /* cursor key Up */
+#define KEY_DOWN CTL_CH('n') /* cursor key Down */
+#define KEY_RIGHT CTL_CH('f') /* Cursor Key Right */
+#define KEY_LEFT CTL_CH('b') /* cursor key Left */
+#define KEY_HOME CTL_CH('a') /* Cursor Key Home */
+#define KEY_ERASE_TO_EOL CTL_CH('k')
+#define KEY_REFRESH_TO_EOL CTL_CH('e')
+#define KEY_ERASE_LINE CTL_CH('x')
+#define KEY_INSERT CTL_CH('o')
+#define KEY_CLEAR_SCREEN CTL_CH('l')
+#define KEY_DEL7 127
+#define KEY_END 133 /* Cursor Key End */
+#define KEY_PAGEUP 135 /* Cursor Key Page Up */
+#define KEY_PAGEDOWN 136 /* Cursor Key Page Down */
+#define KEY_DEL 137 /* Cursor Key Del */
+
+#define MAX_CMDBUF_SIZE 256
+
+#define CTL_BACKSPACE ('\b')
+#define DEL 255
+#define DEL7 127
+#define CREAD_HIST_CHAR ('!')
+
+#define HIST_MAX 10
+
+#define putnstr(str,n) do { \
+ printf ("%.*s", n, str); \
+ } while (0)
+
+#define getcmd_putch(ch) putchar(ch)
+#define getcmd_cbeep() getcmd_putch('\a')
+#define ANSI_CLEAR_SCREEN "\e[2J\e[;H"
+
+#define BEGINNING_OF_LINE() { \
+ while (num) { \
+ getcmd_putch(CTL_BACKSPACE); \
+ num--; \
+ } \
+}
+
+#define ERASE_TO_EOL() { \
+ if (num < eol_num) { \
+ int t; \
+ for (t = num; t < eol_num; t++) \
+ getcmd_putch(' '); \
+ while (t-- > num) \
+ getcmd_putch(CTL_BACKSPACE); \
+ eol_num = num; \
+ } \
+}
+
+#define REFRESH_TO_EOL() { \
+ if (num < eol_num) { \
+ wlen = eol_num - num; \
+ putnstr(buf + num, (int)wlen); \
+ num = eol_num; \
+ } \
+}
+
+int readline(char *buf, int len);
+void hist_init(void);
+
+#endif /* READLINE_H_ */
projects / litex.git / commitdiff