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

/*
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * Add to readline cmdline-editing by
 * (C) Copyright 2005
 * JinHua Luo, GuangDong Linux Center, <[email protected]>
 *
 * 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 <[email protected]>
 */

#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) {
			if (esc_len == 1) {
				if (ichar == '[') {
					esc_save[esc_len] = ichar;
					esc_len = 2;
				} else {
					cread_add_str(esc_save, esc_len,
						      insert, &num, &eol_num,
						      buf, *len);
					esc_len = 0;
				}
				continue;
			}

			switch (ichar) {
			case 'D':	/* <- key */
				ichar = CTL_CH('b');
				esc_len = 0;
				break;
			case 'C':	/* -> key */
				ichar = CTL_CH('f');
				esc_len = 0;
				break;	/* pass off to ^F handler */
			case 'H':	/* Home key */
				ichar = CTL_CH('a');
				esc_len = 0;
				break;	/* pass off to ^A handler */
			case 'A':	/* up arrow */
				ichar = CTL_CH('p');
				esc_len = 0;
				break;	/* pass off to ^P handler */
			case 'B':	/* down arrow */
				ichar = CTL_CH('n');
				esc_len = 0;
				break;	/* pass off to ^N handler */
			default:
				esc_save[esc_len++] = ichar;
				cread_add_str(esc_save, esc_len, insert,
					      &num, &eol_num, buf, *len);
				esc_len = 0;
				continue;
			}
		}

		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, [email protected].
	4	*
	5	* Add to readline cmdline-editing by
	6	* (C) Copyright 2005
	7	* JinHua Luo, GuangDong Linux Center, <[email protected]>
	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 <[email protected]>
	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) {
	286	if (esc_len == 1) {
	287	if (ichar == '[') {
	288	esc_save[esc_len] = ichar;
	289	esc_len = 2;
	290	} else {
	291	cread_add_str(esc_save, esc_len,
	292	insert, &num, &eol_num,
	293	buf, *len);
	294	esc_len = 0;
	295	}
	296	continue;
	297	}
	298
	299	switch (ichar) {
	300	case 'D': /* <- key */
	301	ichar = CTL_CH('b');
	302	esc_len = 0;
	303	break;
	304	case 'C': /* -> key */
	305	ichar = CTL_CH('f');
	306	esc_len = 0;
	307	break; /* pass off to ^F handler */
	308	case 'H': /* Home key */
	309	ichar = CTL_CH('a');
	310	esc_len = 0;
	311	break; /* pass off to ^A handler */
	312	case 'A': /* up arrow */
	313	ichar = CTL_CH('p');
	314	esc_len = 0;
	315	break; /* pass off to ^P handler */
	316	case 'B': /* down arrow */
	317	ichar = CTL_CH('n');
	318	esc_len = 0;
	319	break; /* pass off to ^N handler */
	320	default:
	321	esc_save[esc_len++] = ichar;
	322	cread_add_str(esc_save, esc_len, insert,
	323	&num, &eol_num, buf, *len);
	324	esc_len = 0;
	325	continue;
	326	}
	327	}
328
329	switch (ichar) {
330	case 0x1b:
331	if (esc_len == 0) {
332	esc_save[esc_len] = ichar;
333	esc_len = 1;
334	} else {
335	puts("impossible condition #876\n");
336	esc_len = 0;
337	}
338	break;
339
340	case CTL_CH('a'):
341	BEGINNING_OF_LINE();
342	break;
343	case CTL_CH('c'): /* ^C - break */
344	buf = '\0'; / discard input */
345	return -1;
346	case CTL_CH('f'):
347	if (num < eol_num) {
348	getcmd_putch(buf[num]);
349	num++;
350	}
351	break;
352	case CTL_CH('b'):
353	if (num) {
354	getcmd_putch(CTL_BACKSPACE);
355	num--;
356	}
357	break;
358	case CTL_CH('d'):
359	if (num < eol_num) {
360	wlen = eol_num - num - 1;
361	if (wlen) {
362	memmove(&buf[num], &buf[num+1], wlen);
363	putnstr(buf + num, wlen);
364	}
365
366	getcmd_putch(' ');
367	do {
368	getcmd_putch(CTL_BACKSPACE);
369	} while (wlen--);
370	eol_num--;
371	}
372	break;
373	case CTL_CH('k'):
374	ERASE_TO_EOL();
375	break;
376	case CTL_CH('e'):
377	REFRESH_TO_EOL();
378	break;
379	case CTL_CH('o'):
380	insert = !insert;
381	break;
382	case CTL_CH('x'):
383	case CTL_CH('u'):
384	BEGINNING_OF_LINE();
385	ERASE_TO_EOL();
386	break;
387	case DEL:
388	case DEL7:
389	case 8:
390	if (num) {
391	wlen = eol_num - num;
392	num--;
393	memmove(&buf[num], &buf[num+1], wlen);
394	getcmd_putch(CTL_BACKSPACE);
395	putnstr(buf + num, wlen);
396	getcmd_putch(' ');
397	do {
398	getcmd_putch(CTL_BACKSPACE);
399	} while (wlen--);
400	eol_num--;
401	}
402	break;
403	case CTL_CH('p'):
404	case CTL_CH('n'):
405	{
406	char *hline;
407
408	esc_len = 0;
409
410	if (ichar == CTL_CH('p'))
411	hline = hist_prev();
412	else
413	hline = hist_next();
414
415	if (!hline) {
416	getcmd_cbeep();
417	continue;
418	}
419
420	/* nuke the current line */
421	/* first, go home */
422	BEGINNING_OF_LINE();
423
424	/* erase to end of line */
425	ERASE_TO_EOL();
426
427	/* copy new line into place and display */
428	strcpy(buf, hline);
429	eol_num = strlen(buf);
430	REFRESH_TO_EOL();
431	continue;
432	}
433	#ifdef CONFIG_AUTO_COMPLETE
434	case '\t': {
435	int num2, col;
436
437	/* do not autocomplete when in the middle */
438	if (num < eol_num) {
439	getcmd_cbeep();
440	break;
441	}
442
443	buf[num] = '\0';
444	col = strlen(prompt) + eol_num;
445	num2 = num;
446	if (cmd_auto_complete(prompt, buf, &num2, &col)) {
447	col = num2 - num;
448	num += col;
449	eol_num += col;
450	}
451	break;
452	}
453	#endif
454	default:
455	cread_add_char(ichar, insert, &num, &eol_num, buf,
456	*len);
457	break;
458	}
459	}
460	*len = eol_num;
461	buf[eol_num] = '\0'; /* lose the newline */
462
463	if (buf[0] && buf[0] != CREAD_HIST_CHAR)
464	cread_add_to_hist(buf);
465	hist_cur = hist_add_idx;
466
467	return 0;
468	}
469
470	#endif /* CONFIG_CMDLINE_EDITING */
471
472	/****************************************************************************/
473
e1bf824d	474	int cli_readline(const char *const prompt)
6493ccc7 SG	475	{
	476	/*
	477	* If console_buffer isn't 0-length the user will be prompted to modify
	478	* it instead of entering it from scratch as desired.
	479	*/
	480	console_buffer[0] = '\0';
	481
e1bf824d	482	return cli_readline_into_buffer(prompt, console_buffer, 0);
6493ccc7 SG	483	}
	484
	485
e1bf824d SG	486	int cli_readline_into_buffer(const char const prompt, char buffer,
e1bf824d SG	487	int timeout)
6493ccc7 SG	488	{
	489	char *p = buffer;
	490	#ifdef CONFIG_CMDLINE_EDITING
	491	unsigned int len = CONFIG_SYS_CBSIZE;
	492	int rc;
	493	static int initted;
	494
	495	/*
	496	* History uses a global array which is not
	497	* writable until after relocation to RAM.
	498	* Revert to non-history version if still
	499	* running from flash.
	500	*/
	501	if (gd->flags & GD_FLG_RELOC) {
	502	if (!initted) {
	503	hist_init();
	504	initted = 1;
	505	}
	506
	507	if (prompt)
	508	puts(prompt);
	509
	510	rc = cread_line(prompt, p, &len, timeout);
	511	return rc < 0 ? rc : len;
	512
	513	} else {
	514	#endif /* CONFIG_CMDLINE_EDITING */
	515	char *p_buf = p;
	516	int n = 0; /* buffer index */
	517	int plen = 0; /* prompt length */
	518	int col; /* output column cnt */
	519	char c;
	520
	521	/* print prompt */
	522	if (prompt) {
	523	plen = strlen(prompt);
	524	puts(prompt);
	525	}
	526	col = plen;
	527
	528	for (;;) {
0098e179 SG	529	if (bootretry_tstc_timeout())
0098e179 SG	530	return -2; /* timed out */
6493ccc7 SG	531	WATCHDOG_RESET(); /* Trigger watchdog, if needed */
	532
	533	#ifdef CONFIG_SHOW_ACTIVITY
	534	while (!tstc()) {
	535	show_activity(0);
	536	WATCHDOG_RESET();
	537	}
	538	#endif
	539	c = getc();
	540
	541	/*
	542	* Special character handling
	543	*/
	544	switch (c) {
	545	case '\r': /* Enter */
	546	case '\n':
	547	*p = '\0';
	548	puts("\r\n");
	549	return p - p_buf;
	550
	551	case '\0': /* nul */
	552	continue;
	553
	554	case 0x03: /* ^C - break */
	555	p_buf[0] = '\0'; /* discard input */
	556	return -1;
	557
	558	case 0x15: /* ^U - erase line */
	559	while (col > plen) {
	560	puts(erase_seq);
	561	--col;
	562	}
	563	p = p_buf;
	564	n = 0;
	565	continue;
	566
	567	case 0x17: /* ^W - erase word */
	568	p = delete_char(p_buf, p, &col, &n, plen);
	569	while ((n > 0) && (*p != ' '))
	570	p = delete_char(p_buf, p, &col, &n, plen);
	571	continue;
	572
	573	case 0x08: /* ^H - backspace */
	574	case 0x7F: /* DEL - backspace */
	575	p = delete_char(p_buf, p, &col, &n, plen);
	576	continue;
	577
	578	default:
	579	/*
	580	* Must be a normal character then
	581	*/
	582	if (n < CONFIG_SYS_CBSIZE-2) {
	583	if (c == '\t') { /* expand TABs */
	584	#ifdef CONFIG_AUTO_COMPLETE
	585	/*
	586	* if auto completion triggered just
	587	* continue
	588	*/
	589	*p = '\0';
	590	if (cmd_auto_complete(prompt,
	591	console_buffer,
	592	&n, &col)) {
	593	p = p_buf + n; /* reset */
	594	continue;
595	}
596	#endif
597	puts(tab_seq + (col & 07));
598	col += 8 - (col & 07);
599	} else {
80402f34	600	char __maybe_unused buf[2];
6493ccc7 SG	601
	602	/*
	603	* Echo input using puts() to force an
	604	* LCD flush if we are using an LCD
	605	*/
	606	++col;
	607	buf[0] = c;
	608	buf[1] = '\0';
	609	puts(buf);
	610	}
	611	*p++ = c;
	612	++n;
	613	} else { /* Buffer full */
	614	putc('\a');
	615	}
	616	}
	617	}
	618	#ifdef CONFIG_CMDLINE_EDITING
	619	}
	620	#endif
	621	}