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

// SPDX-License-Identifier: GPL-2.0+
/*
 * (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>
 */

#include <common.h>
#include <bootretry.h>
#include <cli.h>
#include <command.h>
#include <time.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();

		/* ichar=0x0 when error occurs in U-Boot getc */
		if (!ichar)
			continue;

		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 */

		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
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
6493ccc7 SG	2	/*
	3	* (C) Copyright 2000
	4	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	5	*
	6	* Add to readline cmdline-editing by
	7	* (C) Copyright 2005
	8	* JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
6493ccc7 SG	9	*/
	10
	11	#include <common.h>
0098e179	12	#include <bootretry.h>
6493ccc7	13	#include <cli.h>
09140113	14	#include <command.h>
1045315d	15	#include <time.h>
6493ccc7 SG	16	#include <watchdog.h>
	17
	18	DECLARE_GLOBAL_DATA_PTR;
	19
	20	static const char erase_seq[] = "\b \b"; /* erase sequence */
	21	static const char tab_seq[] = " "; /* used to expand TABs */
	22
6493ccc7 SG	23	char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
6493ccc7 SG	24
6493ccc7 SG	25	static char delete_char (char buffer, char p, int colp, int *np, int plen)
	26	{
	27	char *s;
	28
	29	if (*np == 0)
	30	return p;
	31
	32	if ((--p) == '\t') { / will retype the whole line */
	33	while (*colp > plen) {
	34	puts(erase_seq);
	35	(*colp)--;
	36	}
	37	for (s = buffer; s < p; ++s) {
	38	if (*s == '\t') {
	39	puts(tab_seq + ((*colp) & 07));
	40	colp += 8 - ((colp) & 07);
	41	} else {
	42	++(*colp);
	43	putc(*s);
	44	}
	45	}
	46	} else {
	47	puts(erase_seq);
	48	(*colp)--;
	49	}
	50	(*np)--;
	51
	52	return p;
	53	}
	54
	55	#ifdef CONFIG_CMDLINE_EDITING
	56
	57	/*
	58	* cmdline-editing related codes from vivi.
	59	* Author: Janghoon Lyu <nandy@mizi.com>
	60	*/
	61
	62	#define putnstr(str, n) printf("%.*s", (int)n, str)
	63
	64	#define CTL_CH(c) ((c) - 'a' + 1)
	65	#define CTL_BACKSPACE ('\b')
	66	#define DEL ((char)255)
	67	#define DEL7 ((char)127)
	68	#define CREAD_HIST_CHAR ('!')
	69
	70	#define getcmd_putch(ch) putc(ch)
	71	#define getcmd_getch() getc()
	72	#define getcmd_cbeep() getcmd_putch('\a')
	73
	74	#define HIST_MAX 20
	75	#define HIST_SIZE CONFIG_SYS_CBSIZE
	76
	77	static int hist_max;
	78	static int hist_add_idx;
	79	static int hist_cur = -1;
	80	static unsigned hist_num;
	81
	82	static char *hist_list[HIST_MAX];
	83	static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
	84
	85	#define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
	86
	87	static void hist_init(void)
	88	{
89	int i;
90
91	hist_max = 0;
92	hist_add_idx = 0;
93	hist_cur = -1;
94	hist_num = 0;
95
96	for (i = 0; i < HIST_MAX; i++) {
97	hist_list[i] = hist_lines[i];
98	hist_list[i][0] = '\0';
99	}
100	}
101
102	static void cread_add_to_hist(char *line)
103	{
104	strcpy(hist_list[hist_add_idx], line);
105
106	if (++hist_add_idx >= HIST_MAX)
107	hist_add_idx = 0;
108
109	if (hist_add_idx > hist_max)
110	hist_max = hist_add_idx;
111
112	hist_num++;
113	}
114
115	static char *hist_prev(void)
116	{
117	char *ret;
118	int old_cur;
119
120	if (hist_cur < 0)
121	return NULL;
122
123	old_cur = hist_cur;
124	if (--hist_cur < 0)
125	hist_cur = hist_max;
126
127	if (hist_cur == hist_add_idx) {
128	hist_cur = old_cur;
129	ret = NULL;
130	} else {
131	ret = hist_list[hist_cur];
132	}
133
134	return ret;
135	}
136
137	static char *hist_next(void)
138	{
139	char *ret;
140
141	if (hist_cur < 0)
142	return NULL;
143
144	if (hist_cur == hist_add_idx)
145	return NULL;
146
147	if (++hist_cur > hist_max)
148	hist_cur = 0;
149
150	if (hist_cur == hist_add_idx)
151	ret = "";
152	else
153	ret = hist_list[hist_cur];
154
155	return ret;
156	}
157
158	#ifndef CONFIG_CMDLINE_EDITING
159	static void cread_print_hist_list(void)
160	{
161	int i;
162	unsigned long n;
163
164	n = hist_num - hist_max;
165
166	i = hist_add_idx + 1;
167	while (1) {
168	if (i > hist_max)
169	i = 0;
170	if (i == hist_add_idx)
171	break;
172	printf("%s\n", hist_list[i]);
173	n++;
174	i++;
175	}
176	}
177	#endif /* CONFIG_CMDLINE_EDITING */
178
179	#define BEGINNING_OF_LINE() { \
180	while (num) { \
181	getcmd_putch(CTL_BACKSPACE); \
182	num--; \
183	} \
184	}
185
186	#define ERASE_TO_EOL() { \
187	if (num < eol_num) { \
188	printf("%*s", (int)(eol_num - num), ""); \
189	do { \
190	getcmd_putch(CTL_BACKSPACE); \
191	} while (--eol_num > num); \
192	} \
193	}
194
195	#define REFRESH_TO_EOL() { \
196	if (num < eol_num) { \
197	wlen = eol_num - num; \
198	putnstr(buf + num, wlen); \
199	num = eol_num; \
200	} \
201	}
202
203	static void cread_add_char(char ichar, int insert, unsigned long *num,
204	unsigned long eol_num, char buf, unsigned long len)
205	{
206	unsigned long wlen;
207
208	/* room ??? */
209	if (insert \|\| num == eol_num) {
210	if (*eol_num > len - 1) {
211	getcmd_cbeep();
212	return;
213	}
214	(*eol_num)++;
215	}
216
217	if (insert) {
218	wlen = eol_num - num;
219	if (wlen > 1)
220	memmove(&buf[num+1], &buf[num], wlen-1);
221
222	buf[*num] = ichar;
223	putnstr(buf + *num, wlen);
224	(*num)++;
225	while (--wlen)
226	getcmd_putch(CTL_BACKSPACE);
227	} else {
228	/* echo the character */
229	wlen = 1;
230	buf[*num] = ichar;
231	putnstr(buf + *num, wlen);
232	(*num)++;
233	}
234	}
235
236	static void cread_add_str(char *str, int strsize, int insert,
237	unsigned long num, unsigned long eol_num,
238	char *buf, unsigned long len)
239	{
240	while (strsize--) {
241	cread_add_char(*str, insert, num, eol_num, buf, len);
242	str++;
243	}
244	}
245
246	static int cread_line(const char const prompt, char buf, unsigned int *len,
247	int timeout)
248	{
249	unsigned long num = 0;
250	unsigned long eol_num = 0;
251	unsigned long wlen;
252	char ichar;
253	int insert = 1;
254	int esc_len = 0;
255	char esc_save[8];
256	int init_len = strlen(buf);
257	int first = 1;
258
259	if (init_len)
260	cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
261
262	while (1) {
0098e179 SG	263	if (bootretry_tstc_timeout())
0098e179 SG	264	return -2; /* timed out */
6493ccc7 SG	265	if (first && timeout) {
	266	uint64_t etime = endtick(timeout);
	267
	268	while (!tstc()) { /* while no incoming data */
	269	if (get_ticks() >= etime)
	270	return -2; /* timed out */
	271	WATCHDOG_RESET();
	272	}
	273	first = 0;
	274	}
	275
	276	ichar = getcmd_getch();
	277
555e378c PD	278	/* ichar=0x0 when error occurs in U-Boot getc */
	279	if (!ichar)
	280	continue;
	281
6493ccc7 SG	282	if ((ichar == '\n') \|\| (ichar == '\r')) {
	283	putc('\n');
	284	break;
	285	}
	286
	287	/*
	288	* handle standard linux xterm esc sequences for arrow key, etc.
	289	*/
	290	if (esc_len != 0) {
fc18e9b3 JB	291	enum { ESC_REJECT, ESC_SAVE, ESC_CONVERTED } act = ESC_REJECT;
fc18e9b3 JB	292
6493ccc7	293	if (esc_len == 1) {
fc18e9b3 JB	294	if (ichar == '[' \|\| ichar == 'O')
	295	act = ESC_SAVE;
	296	} else if (esc_len == 2) {
	297	switch (ichar) {
	298	case 'D': /* <- key */
	299	ichar = CTL_CH('b');
	300	act = ESC_CONVERTED;
	301	break; /* pass off to ^B handler */
	302	case 'C': /* -> key */
	303	ichar = CTL_CH('f');
	304	act = ESC_CONVERTED;
	305	break; /* pass off to ^F handler */
	306	case 'H': /* Home key */
	307	ichar = CTL_CH('a');
	308	act = ESC_CONVERTED;
	309	break; /* pass off to ^A handler */
	310	case 'F': /* End key */
	311	ichar = CTL_CH('e');
	312	act = ESC_CONVERTED;
	313	break; /* pass off to ^E handler */
	314	case 'A': /* up arrow */
	315	ichar = CTL_CH('p');
	316	act = ESC_CONVERTED;
	317	break; /* pass off to ^P handler */
	318	case 'B': /* down arrow */
	319	ichar = CTL_CH('n');
	320	act = ESC_CONVERTED;
	321	break; /* pass off to ^N handler */
	322	case '1':
	323	case '3':
	324	case '4':
	325	case '7':
	326	case '8':
	327	if (esc_save[1] == '[') {
	328	/* see if next character is ~ */
	329	act = ESC_SAVE;
	330	}
	331	break;
	332	}
	333	} else if (esc_len == 3) {
	334	if (ichar == '~') {
	335	switch (esc_save[2]) {
	336	case '3': /* Delete key */
	337	ichar = CTL_CH('d');
	338	act = ESC_CONVERTED;
	339	break; /* pass to ^D handler */
	340	case '1': /* Home key */
	341	case '7':
	342	ichar = CTL_CH('a');
	343	act = ESC_CONVERTED;
	344	break; /* pass to ^A handler */
	345	case '4': /* End key */
	346	case '8':
	347	ichar = CTL_CH('e');
	348	act = ESC_CONVERTED;
	349	break; /* pass to ^E handler */
	350	}
6493ccc7	351	}
6493ccc7 SG	352	}
6493ccc7 SG	353
fc18e9b3 JB	354	switch (act) {
	355	case ESC_SAVE:
	356	esc_save[esc_len++] = ichar;
	357	continue;
	358	case ESC_REJECT:
6493ccc7 SG	359	esc_save[esc_len++] = ichar;
	360	cread_add_str(esc_save, esc_len, insert,
	361	&num, &eol_num, buf, *len);
	362	esc_len = 0;
	363	continue;
fc18e9b3 JB	364	case ESC_CONVERTED:
	365	esc_len = 0;
	366	break;
6493ccc7 SG	367	}
	368	}
	369
	370	switch (ichar) {
	371	case 0x1b:
	372	if (esc_len == 0) {
	373	esc_save[esc_len] = ichar;
	374	esc_len = 1;
	375	} else {
	376	puts("impossible condition #876\n");
	377	esc_len = 0;
	378	}
	379	break;
	380
	381	case CTL_CH('a'):
	382	BEGINNING_OF_LINE();
	383	break;
	384	case CTL_CH('c'): /* ^C - break */
	385	buf = '\0'; / discard input */
	386	return -1;
	387	case CTL_CH('f'):
	388	if (num < eol_num) {
	389	getcmd_putch(buf[num]);
	390	num++;
	391	}
	392	break;
	393	case CTL_CH('b'):
	394	if (num) {
	395	getcmd_putch(CTL_BACKSPACE);
	396	num--;
	397	}
	398	break;
	399	case CTL_CH('d'):
	400	if (num < eol_num) {
	401	wlen = eol_num - num - 1;
	402	if (wlen) {
	403	memmove(&buf[num], &buf[num+1], wlen);
	404	putnstr(buf + num, wlen);
	405	}
	406
	407	getcmd_putch(' ');
	408	do {
	409	getcmd_putch(CTL_BACKSPACE);
	410	} while (wlen--);
	411	eol_num--;
	412	}
	413	break;
	414	case CTL_CH('k'):
	415	ERASE_TO_EOL();
	416	break;
	417	case CTL_CH('e'):
	418	REFRESH_TO_EOL();
	419	break;
	420	case CTL_CH('o'):
	421	insert = !insert;
	422	break;
	423	case CTL_CH('x'):
	424	case CTL_CH('u'):
	425	BEGINNING_OF_LINE();
	426	ERASE_TO_EOL();
	427	break;
	428	case DEL:
	429	case DEL7:
	430	case 8:
431	if (num) {
432	wlen = eol_num - num;
433	num--;
434	memmove(&buf[num], &buf[num+1], wlen);
435	getcmd_putch(CTL_BACKSPACE);
436	putnstr(buf + num, wlen);
437	getcmd_putch(' ');
438	do {
439	getcmd_putch(CTL_BACKSPACE);
440	} while (wlen--);
441	eol_num--;
442	}
443	break;
444	case CTL_CH('p'):
445	case CTL_CH('n'):
446	{
447	char *hline;
448
449	esc_len = 0;
450
451	if (ichar == CTL_CH('p'))
452	hline = hist_prev();
453	else
454	hline = hist_next();
455
456	if (!hline) {
457	getcmd_cbeep();
458	continue;
459	}
460
461	/* nuke the current line */
462	/* first, go home */
463	BEGINNING_OF_LINE();
464
465	/* erase to end of line */
466	ERASE_TO_EOL();
467
468	/* copy new line into place and display */
469	strcpy(buf, hline);
470	eol_num = strlen(buf);
471	REFRESH_TO_EOL();
472	continue;
473	}
474	#ifdef CONFIG_AUTO_COMPLETE
475	case '\t': {
476	int num2, col;
477
478	/* do not autocomplete when in the middle */
479	if (num < eol_num) {
480	getcmd_cbeep();
481	break;
482	}
483
484	buf[num] = '\0';
485	col = strlen(prompt) + eol_num;
486	num2 = num;
487	if (cmd_auto_complete(prompt, buf, &num2, &col)) {
488	col = num2 - num;
489	num += col;
490	eol_num += col;
491	}
492	break;
493	}
494	#endif
495	default:
496	cread_add_char(ichar, insert, &num, &eol_num, buf,
497	*len);
498	break;
499	}
500	}
501	*len = eol_num;
502	buf[eol_num] = '\0'; /* lose the newline */
503
504	if (buf[0] && buf[0] != CREAD_HIST_CHAR)
505	cread_add_to_hist(buf);
506	hist_cur = hist_add_idx;
507
508	return 0;
509	}
510
511	#endif /* CONFIG_CMDLINE_EDITING */
512
513	/****************************************************************************/
514
e1bf824d	515	int cli_readline(const char *const prompt)
6493ccc7 SG	516	{
	517	/*
	518	* If console_buffer isn't 0-length the user will be prompted to modify
	519	* it instead of entering it from scratch as desired.
	520	*/
	521	console_buffer[0] = '\0';
	522
e1bf824d	523	return cli_readline_into_buffer(prompt, console_buffer, 0);
6493ccc7 SG	524	}
	525
	526
e1bf824d SG	527	int cli_readline_into_buffer(const char const prompt, char buffer,
e1bf824d SG	528	int timeout)
6493ccc7 SG	529	{
	530	char *p = buffer;
	531	#ifdef CONFIG_CMDLINE_EDITING
	532	unsigned int len = CONFIG_SYS_CBSIZE;
	533	int rc;
	534	static int initted;
	535
	536	/*
	537	* History uses a global array which is not
	538	* writable until after relocation to RAM.
	539	* Revert to non-history version if still
	540	* running from flash.
	541	*/
	542	if (gd->flags & GD_FLG_RELOC) {
	543	if (!initted) {
	544	hist_init();
	545	initted = 1;
	546	}
	547
	548	if (prompt)
	549	puts(prompt);
	550
	551	rc = cread_line(prompt, p, &len, timeout);
	552	return rc < 0 ? rc : len;
	553
	554	} else {
	555	#endif /* CONFIG_CMDLINE_EDITING */
	556	char *p_buf = p;
	557	int n = 0; /* buffer index */
	558	int plen = 0; /* prompt length */
	559	int col; /* output column cnt */
	560	char c;
	561
	562	/* print prompt */
	563	if (prompt) {
	564	plen = strlen(prompt);
	565	puts(prompt);
	566	}
	567	col = plen;
	568
	569	for (;;) {
0098e179 SG	570	if (bootretry_tstc_timeout())
0098e179 SG	571	return -2; /* timed out */
6493ccc7 SG	572	WATCHDOG_RESET(); /* Trigger watchdog, if needed */
6493ccc7 SG	573
6493ccc7 SG	574	c = getc();
	575
	576	/*
	577	* Special character handling
	578	*/
	579	switch (c) {
	580	case '\r': /* Enter */
	581	case '\n':
	582	*p = '\0';
	583	puts("\r\n");
	584	return p - p_buf;
	585
	586	case '\0': /* nul */
	587	continue;
	588
	589	case 0x03: /* ^C - break */
	590	p_buf[0] = '\0'; /* discard input */
	591	return -1;
	592
	593	case 0x15: /* ^U - erase line */
	594	while (col > plen) {
	595	puts(erase_seq);
	596	--col;
	597	}
	598	p = p_buf;
	599	n = 0;
	600	continue;
	601
	602	case 0x17: /* ^W - erase word */
	603	p = delete_char(p_buf, p, &col, &n, plen);
	604	while ((n > 0) && (*p != ' '))
	605	p = delete_char(p_buf, p, &col, &n, plen);
	606	continue;
	607
	608	case 0x08: /* ^H - backspace */
	609	case 0x7F: /* DEL - backspace */
	610	p = delete_char(p_buf, p, &col, &n, plen);
	611	continue;
	612
	613	default:
	614	/*
	615	* Must be a normal character then
	616	*/
	617	if (n < CONFIG_SYS_CBSIZE-2) {
	618	if (c == '\t') { /* expand TABs */
	619	#ifdef CONFIG_AUTO_COMPLETE
	620	/*
	621	* if auto completion triggered just
	622	* continue
	623	*/
	624	*p = '\0';
	625	if (cmd_auto_complete(prompt,
	626	console_buffer,
	627	&n, &col)) {
	628	p = p_buf + n; /* reset */
	629	continue;
	630	}
	631	#endif
	632	puts(tab_seq + (col & 07));
	633	col += 8 - (col & 07);
	634	} else {
80402f34	635	char __maybe_unused buf[2];
6493ccc7 SG	636
	637	/*
	638	* Echo input using puts() to force an
	639	* LCD flush if we are using an LCD
	640	*/
	641	++col;
	642	buf[0] = c;
	643	buf[1] = '\0';
	644	puts(buf);
	645	}
	646	*p++ = c;
	647	++n;
	648	} else { /* Buffer full */
	649	putc('\a');
	650	}
	651	}
	652	}
	653	#ifdef CONFIG_CMDLINE_EDITING
	654	}
	655	#endif
	656	}