[people/ms/u-boot.git] / common / cli_readline.c

/*
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * Add to readline cmdline-editing by
 * (C) Copyright 2005
 * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <bootretry.h>
#include <cli.h>
#include <watchdog.h>

DECLARE_GLOBAL_DATA_PTR;

static const char erase_seq[] = "\b \b";	/* erase sequence */
static const char   tab_seq[] = "        ";	/* used to expand TABs */

char console_buffer[CONFIG_SYS_CBSIZE + 1];	/* console I/O buffer	*/

static char *delete_char (char *buffer, char *p, int *colp, int *np, int plen)
{
	char *s;

	if (*np == 0)
		return p;

	if (*(--p) == '\t') {		/* will retype the whole line */
		while (*colp > plen) {
			puts(erase_seq);
			(*colp)--;
		}
		for (s = buffer; s < p; ++s) {
			if (*s == '\t') {
				puts(tab_seq + ((*colp) & 07));
				*colp += 8 - ((*colp) & 07);
			} else {
				++(*colp);
				putc(*s);
			}
		}
	} else {
		puts(erase_seq);
		(*colp)--;
	}
	(*np)--;

	return p;
}

#ifdef CONFIG_CMDLINE_EDITING

/*
 * cmdline-editing related codes from vivi.
 * Author: Janghoon Lyu <nandy@mizi.com>
 */

#define putnstr(str, n)	printf("%.*s", (int)n, str)

#define CTL_CH(c)		((c) - 'a' + 1)
#define CTL_BACKSPACE		('\b')
#define DEL			((char)255)
#define DEL7			((char)127)
#define CREAD_HIST_CHAR		('!')

#define getcmd_putch(ch)	putc(ch)
#define getcmd_getch()		getc()
#define getcmd_cbeep()		getcmd_putch('\a')

#define HIST_MAX		20
#define HIST_SIZE		CONFIG_SYS_CBSIZE

static int hist_max;
static int hist_add_idx;
static int hist_cur = -1;
static unsigned hist_num;

static char *hist_list[HIST_MAX];
static char hist_lines[HIST_MAX][HIST_SIZE + 1];	/* Save room for NULL */

#define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)

static 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_list[i] = hist_lines[i];
		hist_list[i][0] = '\0';
	}
}

static void cread_add_to_hist(char *line)
{
	strcpy(hist_list[hist_add_idx], 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_list[hist_cur];
	}

	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_list[hist_cur];

	return ret;
}

#ifndef CONFIG_CMDLINE_EDITING
static void cread_print_hist_list(void)
{
	int i;
	unsigned long n;

	n = hist_num - hist_max;

	i = hist_add_idx + 1;
	while (1) {
		if (i > hist_max)
			i = 0;
		if (i == hist_add_idx)
			break;
		printf("%s\n", hist_list[i]);
		n++;
		i++;
	}
}
#endif /* CONFIG_CMDLINE_EDITING */

#define BEGINNING_OF_LINE() {			\
	while (num) {				\
		getcmd_putch(CTL_BACKSPACE);	\
		num--;				\
	}					\
}

#define ERASE_TO_EOL() {				\
	if (num < eol_num) {				\
		printf("%*s", (int)(eol_num - num), ""); \
		do {					\
			getcmd_putch(CTL_BACKSPACE);	\
		} while (--eol_num > num);		\
	}						\
}

#define REFRESH_TO_EOL() {			\
	if (num < eol_num) {			\
		wlen = eol_num - num;		\
		putnstr(buf + num, wlen);	\
		num = eol_num;			\
	}					\
}

static void cread_add_char(char ichar, int insert, unsigned long *num,
	       unsigned long *eol_num, char *buf, unsigned long len)
{
	unsigned long wlen;

	/* room ??? */
	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)++;
	}
}

static void cread_add_str(char *str, int strsize, int insert,
			  unsigned long *num, unsigned long *eol_num,
			  char *buf, unsigned long len)
{
	while (strsize--) {
		cread_add_char(*str, insert, num, eol_num, buf, len);
		str++;
	}
}

static int cread_line(const char *const prompt, char *buf, unsigned int *len,
		int timeout)
{
	unsigned long num = 0;
	unsigned long eol_num = 0;
	unsigned long wlen;
	char ichar;
	int insert = 1;
	int esc_len = 0;
	char esc_save[8];
	int init_len = strlen(buf);
	int first = 1;

	if (init_len)
		cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);

	while (1) {
		if (bootretry_tstc_timeout())
			return -2;	/* timed out */
		if (first && timeout) {
			uint64_t etime = endtick(timeout);

			while (!tstc()) {	/* while no incoming data */
				if (get_ticks() >= etime)
					return -2;	/* timed out */
				WATCHDOG_RESET();
			}
			first = 0;
		}

		ichar = getcmd_getch();

		if ((ichar == '\n') || (ichar == '\r')) {
			putc('\n');
			break;
		}

		/*
		 * handle standard linux xterm esc sequences for arrow key, etc.
		 */
		if (esc_len != 0) {
			enum { ESC_REJECT, ESC_SAVE, ESC_CONVERTED } act = ESC_REJECT;

			if (esc_len == 1) {
				if (ichar == '[' || ichar == 'O')
					act = ESC_SAVE;
			} else if (esc_len == 2) {
				switch (ichar) {
				case 'D':	/* <- key */
					ichar = CTL_CH('b');
					act = ESC_CONVERTED;
					break;	/* pass off to ^B handler */
				case 'C':	/* -> key */
					ichar = CTL_CH('f');
					act = ESC_CONVERTED;
					break;	/* pass off to ^F handler */
				case 'H':	/* Home key */
					ichar = CTL_CH('a');
					act = ESC_CONVERTED;
					break;	/* pass off to ^A handler */
				case 'F':	/* End key */
					ichar = CTL_CH('e');
					act = ESC_CONVERTED;
					break;	/* pass off to ^E handler */
				case 'A':	/* up arrow */
					ichar = CTL_CH('p');
					act = ESC_CONVERTED;
					break;	/* pass off to ^P handler */
				case 'B':	/* down arrow */
					ichar = CTL_CH('n');
					act = ESC_CONVERTED;
					break;	/* pass off to ^N handler */
				case '1':
				case '3':
				case '4':
				case '7':
				case '8':
					if (esc_save[1] == '[') {
						/* see if next character is ~ */
						act = ESC_SAVE;
					}
					break;
				}
			} else if (esc_len == 3) {
				if (ichar == '~') {
					switch (esc_save[2]) {
					case '3':	/* Delete key */
						ichar = CTL_CH('d');
						act = ESC_CONVERTED;
						break;	/* pass to ^D handler */
					case '1':	/* Home key */
					case '7':
						ichar = CTL_CH('a');
						act = ESC_CONVERTED;
						break;	/* pass to ^A handler */
					case '4':	/* End key */
					case '8':
						ichar = CTL_CH('e');
						act = ESC_CONVERTED;
						break;	/* pass to ^E handler */
					}
				}
			}

			switch (act) {
			case ESC_SAVE:
				esc_save[esc_len++] = ichar;
				continue;
			case ESC_REJECT:
				esc_save[esc_len++] = ichar;
				cread_add_str(esc_save, esc_len, insert,
					      &num, &eol_num, buf, *len);
				esc_len = 0;
				continue;
			case ESC_CONVERTED:
				esc_len = 0;
				break;
			}
		}

		switch (ichar) {
		case 0x1b:
			if (esc_len == 0) {
				esc_save[esc_len] = ichar;
				esc_len = 1;
			} else {
				puts("impossible condition #876\n");
				esc_len = 0;
			}
			break;

		case CTL_CH('a'):
			BEGINNING_OF_LINE();
			break;
		case CTL_CH('c'):	/* ^C - break */
			*buf = '\0';	/* discard input */
			return -1;
		case CTL_CH('f'):
			if (num < eol_num) {
				getcmd_putch(buf[num]);
				num++;
			}
			break;
		case CTL_CH('b'):
			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, wlen);
				}

				getcmd_putch(' ');
				do {
					getcmd_putch(CTL_BACKSPACE);
				} while (wlen--);
				eol_num--;
			}
			break;
		case CTL_CH('k'):
			ERASE_TO_EOL();
			break;
		case CTL_CH('e'):
			REFRESH_TO_EOL();
			break;
		case CTL_CH('o'):
			insert = !insert;
			break;
		case CTL_CH('x'):
		case CTL_CH('u'):
			BEGINNING_OF_LINE();
			ERASE_TO_EOL();
			break;
		case DEL:
		case DEL7:
		case 8:
			if (num) {
				wlen = eol_num - num;
				num--;
				memmove(&buf[num], &buf[num+1], wlen);
				getcmd_putch(CTL_BACKSPACE);
				putnstr(buf + num, wlen);
				getcmd_putch(' ');
				do {
					getcmd_putch(CTL_BACKSPACE);
				} while (wlen--);
				eol_num--;
			}
			break;
		case CTL_CH('p'):
		case CTL_CH('n'):
		{
			char *hline;

			esc_len = 0;

			if (ichar == CTL_CH('p'))
				hline = hist_prev();
			else
				hline = hist_next();

			if (!hline) {
				getcmd_cbeep();
				continue;
			}

			/* 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();
			continue;
		}
#ifdef CONFIG_AUTO_COMPLETE
		case '\t': {
			int num2, col;

			/* do not autocomplete when in the middle */
			if (num < eol_num) {
				getcmd_cbeep();
				break;
			}

			buf[num] = '\0';
			col = strlen(prompt) + eol_num;
			num2 = num;
			if (cmd_auto_complete(prompt, buf, &num2, &col)) {
				col = num2 - num;
				num += col;
				eol_num += col;
			}
			break;
		}
#endif
		default:
			cread_add_char(ichar, insert, &num, &eol_num, buf,
				       *len);
			break;
		}
	}
	*len = eol_num;
	buf[eol_num] = '\0';	/* lose the newline */

	if (buf[0] && buf[0] != CREAD_HIST_CHAR)
		cread_add_to_hist(buf);
	hist_cur = hist_add_idx;

	return 0;
}

#endif /* CONFIG_CMDLINE_EDITING */

/****************************************************************************/

int cli_readline(const char *const prompt)
{
	/*
	 * If console_buffer isn't 0-length the user will be prompted to modify
	 * it instead of entering it from scratch as desired.
	 */
	console_buffer[0] = '\0';

	return cli_readline_into_buffer(prompt, console_buffer, 0);
}


int cli_readline_into_buffer(const char *const prompt, char *buffer,
			     int timeout)
{
	char *p = buffer;
#ifdef CONFIG_CMDLINE_EDITING
	unsigned int len = CONFIG_SYS_CBSIZE;
	int rc;
	static int initted;

	/*
	 * History uses a global array which is not
	 * writable until after relocation to RAM.
	 * Revert to non-history version if still
	 * running from flash.
	 */
	if (gd->flags & GD_FLG_RELOC) {
		if (!initted) {
			hist_init();
			initted = 1;
		}

		if (prompt)
			puts(prompt);

		rc = cread_line(prompt, p, &len, timeout);
		return rc < 0 ? rc : len;

	} else {
#endif	/* CONFIG_CMDLINE_EDITING */
	char *p_buf = p;
	int	n = 0;				/* buffer index		*/
	int	plen = 0;			/* prompt length	*/
	int	col;				/* output column cnt	*/
	char	c;

	/* print prompt */
	if (prompt) {
		plen = strlen(prompt);
		puts(prompt);
	}
	col = plen;

	for (;;) {
		if (bootretry_tstc_timeout())
			return -2;	/* timed out */
		WATCHDOG_RESET();	/* Trigger watchdog, if needed */

#ifdef CONFIG_SHOW_ACTIVITY
		while (!tstc()) {
			show_activity(0);
			WATCHDOG_RESET();
		}
#endif
		c = getc();

		/*
		 * Special character handling
		 */
		switch (c) {
		case '\r':			/* Enter		*/
		case '\n':
			*p = '\0';
			puts("\r\n");
			return p - p_buf;

		case '\0':			/* nul			*/
			continue;

		case 0x03:			/* ^C - break		*/
			p_buf[0] = '\0';	/* discard input */
			return -1;

		case 0x15:			/* ^U - erase line	*/
			while (col > plen) {
				puts(erase_seq);
				--col;
			}
			p = p_buf;
			n = 0;
			continue;

		case 0x17:			/* ^W - erase word	*/
			p = delete_char(p_buf, p, &col, &n, plen);
			while ((n > 0) && (*p != ' '))
				p = delete_char(p_buf, p, &col, &n, plen);
			continue;

		case 0x08:			/* ^H  - backspace	*/
		case 0x7F:			/* DEL - backspace	*/
			p = delete_char(p_buf, p, &col, &n, plen);
			continue;

		default:
			/*
			 * Must be a normal character then
			 */
			if (n < CONFIG_SYS_CBSIZE-2) {
				if (c == '\t') {	/* expand TABs */
#ifdef CONFIG_AUTO_COMPLETE
					/*
					 * if auto completion triggered just
					 * continue
					 */
					*p = '\0';
					if (cmd_auto_complete(prompt,
							      console_buffer,
							      &n, &col)) {
						p = p_buf + n;	/* reset */
						continue;
					}
#endif
					puts(tab_seq + (col & 07));
					col += 8 - (col & 07);
				} else {
					char __maybe_unused buf[2];

					/*
					 * Echo input using puts() to force an
					 * LCD flush if we are using an LCD
					 */
					++col;
					buf[0] = c;
					buf[1] = '\0';
					puts(buf);
				}
				*p++ = c;
				++n;
			} else {			/* Buffer full */
				putc('\a');
			}
		}
	}
#ifdef CONFIG_CMDLINE_EDITING
	}
#endif
}
Commit	Line	Data
6493ccc7 SG	1	/*
	2	* (C) Copyright 2000
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* Add to readline cmdline-editing by
	6	* (C) Copyright 2005
	7	* JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
	8	*
	9	* SPDX-License-Identifier: GPL-2.0+
	10	*/
	11
	12	#include <common.h>
0098e179	13	#include <bootretry.h>
6493ccc7 SG	14	#include <cli.h>
	15	#include <watchdog.h>
	16
	17	DECLARE_GLOBAL_DATA_PTR;
	18
	19	static const char erase_seq[] = "\b \b"; /* erase sequence */
	20	static const char tab_seq[] = " "; /* used to expand TABs */
	21
6493ccc7 SG	22	char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
6493ccc7 SG	23
6493ccc7 SG	24	static char delete_char (char buffer, char p, int colp, int *np, int plen)
	25	{
	26	char *s;
	27
	28	if (*np == 0)
	29	return p;
	30
	31	if ((--p) == '\t') { / will retype the whole line */
	32	while (*colp > plen) {
	33	puts(erase_seq);
	34	(*colp)--;
	35	}
	36	for (s = buffer; s < p; ++s) {
	37	if (*s == '\t') {
	38	puts(tab_seq + ((*colp) & 07));
	39	colp += 8 - ((colp) & 07);
	40	} else {
	41	++(*colp);
	42	putc(*s);
	43	}
	44	}
	45	} else {
	46	puts(erase_seq);
	47	(*colp)--;
	48	}
	49	(*np)--;
	50
	51	return p;
	52	}
	53
	54	#ifdef CONFIG_CMDLINE_EDITING
	55
	56	/*
	57	* cmdline-editing related codes from vivi.
	58	* Author: Janghoon Lyu <nandy@mizi.com>
	59	*/
	60
	61	#define putnstr(str, n) printf("%.*s", (int)n, str)
	62
	63	#define CTL_CH(c) ((c) - 'a' + 1)
	64	#define CTL_BACKSPACE ('\b')
	65	#define DEL ((char)255)
	66	#define DEL7 ((char)127)
	67	#define CREAD_HIST_CHAR ('!')
	68
	69	#define getcmd_putch(ch) putc(ch)
	70	#define getcmd_getch() getc()
	71	#define getcmd_cbeep() getcmd_putch('\a')
	72
	73	#define HIST_MAX 20
	74	#define HIST_SIZE CONFIG_SYS_CBSIZE
	75
	76	static int hist_max;
	77	static int hist_add_idx;
	78	static int hist_cur = -1;
	79	static unsigned hist_num;
	80
	81	static char *hist_list[HIST_MAX];
	82	static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
	83
	84	#define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
	85
	86	static void hist_init(void)
	87	{
88	int i;
89
90	hist_max = 0;
91	hist_add_idx = 0;
92	hist_cur = -1;
93	hist_num = 0;
94
95	for (i = 0; i < HIST_MAX; i++) {
96	hist_list[i] = hist_lines[i];
97	hist_list[i][0] = '\0';
98	}
99	}
100
101	static void cread_add_to_hist(char *line)
102	{
103	strcpy(hist_list[hist_add_idx], line);
104
105	if (++hist_add_idx >= HIST_MAX)
106	hist_add_idx = 0;
107
108	if (hist_add_idx > hist_max)
109	hist_max = hist_add_idx;
110
111	hist_num++;
112	}
113
114	static char *hist_prev(void)
115	{
116	char *ret;
117	int old_cur;
118
119	if (hist_cur < 0)
120	return NULL;
121
122	old_cur = hist_cur;
123	if (--hist_cur < 0)
124	hist_cur = hist_max;
125
126	if (hist_cur == hist_add_idx) {
127	hist_cur = old_cur;
128	ret = NULL;
129	} else {
130	ret = hist_list[hist_cur];
131	}
132
133	return ret;
134	}
135
136	static char *hist_next(void)
137	{
138	char *ret;
139
140	if (hist_cur < 0)
141	return NULL;
142
143	if (hist_cur == hist_add_idx)
144	return NULL;
145
146	if (++hist_cur > hist_max)
147	hist_cur = 0;
148
149	if (hist_cur == hist_add_idx)
150	ret = "";
151	else
152	ret = hist_list[hist_cur];
153
154	return ret;
155	}
156
157	#ifndef CONFIG_CMDLINE_EDITING
158	static void cread_print_hist_list(void)
159	{
160	int i;
161	unsigned long n;
162
163	n = hist_num - hist_max;
164
165	i = hist_add_idx + 1;
166	while (1) {
167	if (i > hist_max)
168	i = 0;
169	if (i == hist_add_idx)
170	break;
171	printf("%s\n", hist_list[i]);
172	n++;
173	i++;
174	}
175	}
176	#endif /* CONFIG_CMDLINE_EDITING */
177
178	#define BEGINNING_OF_LINE() { \
179	while (num) { \
180	getcmd_putch(CTL_BACKSPACE); \
181	num--; \
182	} \
183	}
184
185	#define ERASE_TO_EOL() { \
186	if (num < eol_num) { \
187	printf("%*s", (int)(eol_num - num), ""); \
188	do { \
189	getcmd_putch(CTL_BACKSPACE); \
190	} while (--eol_num > num); \
191	} \
192	}
193
194	#define REFRESH_TO_EOL() { \
195	if (num < eol_num) { \
196	wlen = eol_num - num; \
197	putnstr(buf + num, wlen); \
198	num = eol_num; \
199	} \
200	}
201
202	static void cread_add_char(char ichar, int insert, unsigned long *num,
203	unsigned long eol_num, char buf, unsigned long len)
204	{
205	unsigned long wlen;
206
207	/* room ??? */
208	if (insert \|\| num == eol_num) {
209	if (*eol_num > len - 1) {
210	getcmd_cbeep();
211	return;
212	}
213	(*eol_num)++;
214	}
215
216	if (insert) {
217	wlen = eol_num - num;
218	if (wlen > 1)
219	memmove(&buf[num+1], &buf[num], wlen-1);
220
221	buf[*num] = ichar;
222	putnstr(buf + *num, wlen);
223	(*num)++;
224	while (--wlen)
225	getcmd_putch(CTL_BACKSPACE);
226	} else {
227	/* echo the character */
228	wlen = 1;
229	buf[*num] = ichar;
230	putnstr(buf + *num, wlen);
231	(*num)++;
232	}
233	}
234
235	static void cread_add_str(char *str, int strsize, int insert,
236	unsigned long num, unsigned long eol_num,
237	char *buf, unsigned long len)
238	{
239	while (strsize--) {
240	cread_add_char(*str, insert, num, eol_num, buf, len);
241	str++;
242	}
243	}
244
245	static int cread_line(const char const prompt, char buf, unsigned int *len,
246	int timeout)
247	{
248	unsigned long num = 0;
249	unsigned long eol_num = 0;
250	unsigned long wlen;
251	char ichar;
252	int insert = 1;
253	int esc_len = 0;
254	char esc_save[8];
255	int init_len = strlen(buf);
256	int first = 1;
257
258	if (init_len)
259	cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
260
261	while (1) {
0098e179 SG	262	if (bootretry_tstc_timeout())
0098e179 SG	263	return -2; /* timed out */
6493ccc7 SG	264	if (first && timeout) {
	265	uint64_t etime = endtick(timeout);
	266
	267	while (!tstc()) { /* while no incoming data */
	268	if (get_ticks() >= etime)
	269	return -2; /* timed out */
	270	WATCHDOG_RESET();
	271	}
	272	first = 0;
	273	}
	274
	275	ichar = getcmd_getch();
	276
	277	if ((ichar == '\n') \|\| (ichar == '\r')) {
	278	putc('\n');
	279	break;
	280	}
	281
	282	/*
	283	* handle standard linux xterm esc sequences for arrow key, etc.
	284	*/
	285	if (esc_len != 0) {
fc18e9b3 JB	286	enum { ESC_REJECT, ESC_SAVE, ESC_CONVERTED } act = ESC_REJECT;
fc18e9b3 JB	287
6493ccc7	288	if (esc_len == 1) {
fc18e9b3 JB	289	if (ichar == '[' \|\| ichar == 'O')
	290	act = ESC_SAVE;
	291	} else if (esc_len == 2) {
	292	switch (ichar) {
	293	case 'D': /* <- key */
	294	ichar = CTL_CH('b');
	295	act = ESC_CONVERTED;
	296	break; /* pass off to ^B handler */
	297	case 'C': /* -> key */
	298	ichar = CTL_CH('f');
	299	act = ESC_CONVERTED;
	300	break; /* pass off to ^F handler */
	301	case 'H': /* Home key */
	302	ichar = CTL_CH('a');
	303	act = ESC_CONVERTED;
	304	break; /* pass off to ^A handler */
	305	case 'F': /* End key */
	306	ichar = CTL_CH('e');
	307	act = ESC_CONVERTED;
	308	break; /* pass off to ^E handler */
	309	case 'A': /* up arrow */
	310	ichar = CTL_CH('p');
	311	act = ESC_CONVERTED;
	312	break; /* pass off to ^P handler */
	313	case 'B': /* down arrow */
	314	ichar = CTL_CH('n');
	315	act = ESC_CONVERTED;
	316	break; /* pass off to ^N handler */
	317	case '1':
	318	case '3':
	319	case '4':
	320	case '7':
	321	case '8':
	322	if (esc_save[1] == '[') {
	323	/* see if next character is ~ */
	324	act = ESC_SAVE;
	325	}
	326	break;
	327	}
	328	} else if (esc_len == 3) {
	329	if (ichar == '~') {
	330	switch (esc_save[2]) {
	331	case '3': /* Delete key */
	332	ichar = CTL_CH('d');
	333	act = ESC_CONVERTED;
	334	break; /* pass to ^D handler */
	335	case '1': /* Home key */
	336	case '7':
	337	ichar = CTL_CH('a');
	338	act = ESC_CONVERTED;
	339	break; /* pass to ^A handler */
	340	case '4': /* End key */
	341	case '8':
	342	ichar = CTL_CH('e');
	343	act = ESC_CONVERTED;
	344	break; /* pass to ^E handler */
	345	}
6493ccc7	346	}
6493ccc7 SG	347	}
6493ccc7 SG	348
fc18e9b3 JB	349	switch (act) {
	350	case ESC_SAVE:
	351	esc_save[esc_len++] = ichar;
	352	continue;
	353	case ESC_REJECT:
6493ccc7 SG	354	esc_save[esc_len++] = ichar;
	355	cread_add_str(esc_save, esc_len, insert,
	356	&num, &eol_num, buf, *len);
	357	esc_len = 0;
	358	continue;
fc18e9b3 JB	359	case ESC_CONVERTED:
	360	esc_len = 0;
	361	break;
6493ccc7 SG	362	}
	363	}
	364
	365	switch (ichar) {
	366	case 0x1b:
	367	if (esc_len == 0) {
	368	esc_save[esc_len] = ichar;
	369	esc_len = 1;
	370	} else {
	371	puts("impossible condition #876\n");
	372	esc_len = 0;
	373	}
	374	break;
	375
	376	case CTL_CH('a'):
	377	BEGINNING_OF_LINE();
	378	break;
	379	case CTL_CH('c'): /* ^C - break */
	380	buf = '\0'; / discard input */
	381	return -1;
	382	case CTL_CH('f'):
	383	if (num < eol_num) {
	384	getcmd_putch(buf[num]);
	385	num++;
	386	}
	387	break;
	388	case CTL_CH('b'):
	389	if (num) {
	390	getcmd_putch(CTL_BACKSPACE);
	391	num--;
	392	}
	393	break;
	394	case CTL_CH('d'):
	395	if (num < eol_num) {
	396	wlen = eol_num - num - 1;
	397	if (wlen) {
	398	memmove(&buf[num], &buf[num+1], wlen);
	399	putnstr(buf + num, wlen);
	400	}
	401
	402	getcmd_putch(' ');
	403	do {
	404	getcmd_putch(CTL_BACKSPACE);
	405	} while (wlen--);
	406	eol_num--;
	407	}
	408	break;
	409	case CTL_CH('k'):
	410	ERASE_TO_EOL();
	411	break;
	412	case CTL_CH('e'):
	413	REFRESH_TO_EOL();
	414	break;
	415	case CTL_CH('o'):
	416	insert = !insert;
	417	break;
	418	case CTL_CH('x'):
	419	case CTL_CH('u'):
	420	BEGINNING_OF_LINE();
	421	ERASE_TO_EOL();
	422	break;
	423	case DEL:
	424	case DEL7:
	425	case 8:
426	if (num) {
427	wlen = eol_num - num;
428	num--;
429	memmove(&buf[num], &buf[num+1], wlen);
430	getcmd_putch(CTL_BACKSPACE);
431	putnstr(buf + num, wlen);
432	getcmd_putch(' ');
433	do {
434	getcmd_putch(CTL_BACKSPACE);
435	} while (wlen--);
436	eol_num--;
437	}
438	break;
439	case CTL_CH('p'):
440	case CTL_CH('n'):
441	{
442	char *hline;
443
444	esc_len = 0;
445
446	if (ichar == CTL_CH('p'))
447	hline = hist_prev();
448	else
449	hline = hist_next();
450
451	if (!hline) {
452	getcmd_cbeep();
453	continue;
454	}
455
456	/* nuke the current line */
457	/* first, go home */
458	BEGINNING_OF_LINE();
459
460	/* erase to end of line */
461	ERASE_TO_EOL();
462
463	/* copy new line into place and display */
464	strcpy(buf, hline);
465	eol_num = strlen(buf);
466	REFRESH_TO_EOL();
467	continue;
468	}
469	#ifdef CONFIG_AUTO_COMPLETE
470	case '\t': {
471	int num2, col;
472
473	/* do not autocomplete when in the middle */
474	if (num < eol_num) {
475	getcmd_cbeep();
476	break;
477	}
478
479	buf[num] = '\0';
480	col = strlen(prompt) + eol_num;
481	num2 = num;
482	if (cmd_auto_complete(prompt, buf, &num2, &col)) {
483	col = num2 - num;
484	num += col;
485	eol_num += col;
486	}
487	break;
488	}
489	#endif
490	default:
491	cread_add_char(ichar, insert, &num, &eol_num, buf,
492	*len);
493	break;
494	}
495	}
496	*len = eol_num;
497	buf[eol_num] = '\0'; /* lose the newline */
498
499	if (buf[0] && buf[0] != CREAD_HIST_CHAR)
500	cread_add_to_hist(buf);
501	hist_cur = hist_add_idx;
502
503	return 0;
504	}
505
506	#endif /* CONFIG_CMDLINE_EDITING */
507
508	/****************************************************************************/
509
e1bf824d	510	int cli_readline(const char *const prompt)
6493ccc7 SG	511	{
	512	/*
	513	* If console_buffer isn't 0-length the user will be prompted to modify
	514	* it instead of entering it from scratch as desired.
	515	*/
	516	console_buffer[0] = '\0';
	517
e1bf824d	518	return cli_readline_into_buffer(prompt, console_buffer, 0);
6493ccc7 SG	519	}
	520
	521
e1bf824d SG	522	int cli_readline_into_buffer(const char const prompt, char buffer,
e1bf824d SG	523	int timeout)
6493ccc7 SG	524	{
	525	char *p = buffer;
	526	#ifdef CONFIG_CMDLINE_EDITING
	527	unsigned int len = CONFIG_SYS_CBSIZE;
	528	int rc;
	529	static int initted;
	530
	531	/*
	532	* History uses a global array which is not
	533	* writable until after relocation to RAM.
	534	* Revert to non-history version if still
	535	* running from flash.
	536	*/
	537	if (gd->flags & GD_FLG_RELOC) {
	538	if (!initted) {
	539	hist_init();
	540	initted = 1;
	541	}
	542
	543	if (prompt)
	544	puts(prompt);
	545
	546	rc = cread_line(prompt, p, &len, timeout);
	547	return rc < 0 ? rc : len;
	548
	549	} else {
	550	#endif /* CONFIG_CMDLINE_EDITING */
	551	char *p_buf = p;
	552	int n = 0; /* buffer index */
	553	int plen = 0; /* prompt length */
	554	int col; /* output column cnt */
	555	char c;
	556
	557	/* print prompt */
	558	if (prompt) {
	559	plen = strlen(prompt);
	560	puts(prompt);
	561	}
	562	col = plen;
	563
	564	for (;;) {
0098e179 SG	565	if (bootretry_tstc_timeout())
0098e179 SG	566	return -2; /* timed out */
6493ccc7 SG	567	WATCHDOG_RESET(); /* Trigger watchdog, if needed */
	568
	569	#ifdef CONFIG_SHOW_ACTIVITY
	570	while (!tstc()) {
	571	show_activity(0);
	572	WATCHDOG_RESET();
	573	}
	574	#endif
	575	c = getc();
	576
	577	/*
	578	* Special character handling
	579	*/
	580	switch (c) {
	581	case '\r': /* Enter */
	582	case '\n':
	583	*p = '\0';
	584	puts("\r\n");
	585	return p - p_buf;
	586
	587	case '\0': /* nul */
	588	continue;
	589
	590	case 0x03: /* ^C - break */
	591	p_buf[0] = '\0'; /* discard input */
	592	return -1;
	593
	594	case 0x15: /* ^U - erase line */
	595	while (col > plen) {
	596	puts(erase_seq);
	597	--col;
	598	}
	599	p = p_buf;
	600	n = 0;
	601	continue;
	602
	603	case 0x17: /* ^W - erase word */
	604	p = delete_char(p_buf, p, &col, &n, plen);
	605	while ((n > 0) && (*p != ' '))
	606	p = delete_char(p_buf, p, &col, &n, plen);
	607	continue;
	608
	609	case 0x08: /* ^H - backspace */
	610	case 0x7F: /* DEL - backspace */
	611	p = delete_char(p_buf, p, &col, &n, plen);
	612	continue;
	613
	614	default:
	615	/*
	616	* Must be a normal character then
	617	*/
	618	if (n < CONFIG_SYS_CBSIZE-2) {
	619	if (c == '\t') { /* expand TABs */
	620	#ifdef CONFIG_AUTO_COMPLETE
	621	/*
	622	* if auto completion triggered just
	623	* continue
	624	*/
	625	*p = '\0';
	626	if (cmd_auto_complete(prompt,
	627	console_buffer,
	628	&n, &col)) {
	629	p = p_buf + n; /* reset */
	630	continue;
631	}
632	#endif
633	puts(tab_seq + (col & 07));
634	col += 8 - (col & 07);
635	} else {
80402f34	636	char __maybe_unused buf[2];
6493ccc7 SG	637
	638	/*
	639	* Echo input using puts() to force an
	640	* LCD flush if we are using an LCD
	641	*/
	642	++col;
	643	buf[0] = c;
	644	buf[1] = '\0';
	645	puts(buf);
	646	}
	647	*p++ = c;
	648	++n;
	649	} else { /* Buffer full */
	650	putc('\a');
	651	}
	652	}
	653	}
	654	#ifdef CONFIG_CMDLINE_EDITING
	655	}
	656	#endif
	657	}