[z180-stamp.git] / avr / 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 <string.h>
#include <stdio.h>

#include "config.h"
#include "con-utils.h"
#include "command.h"
#include "cli_readline.h"

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

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

#ifndef CONFIG_CMDLINE_EDITING
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) {
			my_puts_P(erase_seq);
			(*colp)--;
		}
		for (s = buffer; s < p; ++s) {
			if (*s == '\t') {
				my_puts_P(tab_seq + ((*colp) & 07));
				*colp += 8 - ((*colp) & 07);
			} else {
				++(*colp);
				putchar(*s);
			}
		}
	} else {
		my_puts_P(erase_seq);
		(*colp)--;
	}
	(*np)--;

	return p;
}
#endif /* CONFIG_CMDLINE_EDITING */


#ifdef CONFIG_CMDLINE_EDITING

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

#define putnstr(str, n)	printf_P(PSTR("%.*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)	putchar(ch)
#define getcmd_getch()		my_getchar(1)
#define getcmd_cbeep()		getcmd_putch('\a')

#define HIST_MAX		5
#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 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_P(PSTR("%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_P(PSTR("%*S"), (int)(eol_num - num), PSTR("")); \
		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 FLASH char *const prompt, char *buf, unsigned int *len)
{
	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);

	(void) prompt;

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

	while (1) {
		ichar = getcmd_getch();

		if ((ichar == '\n') || (ichar == '\r')) {
			putchar('\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 {
				my_puts_P(PSTR("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_P(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 */

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

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

	if (!initted) {
		hist_init();
		initted = 1;
	}

	if (prompt)
		my_puts_P(prompt);

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

#else	/* 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_P(prompt);
		my_puts_P(prompt);
	}
	col = plen;

	for (;;) {

		c = my_getchar(1);

		/*
		 * Special character handling
		 */
		switch (c) {
		case '\r':			/* Enter		*/
		case '\n':
			*p = '\0';
			my_puts_P(PSTR("\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) {
				my_puts_P(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
					my_puts_P(tab_seq + (col & 07));
					col += 8 - (col & 07);
				} else {
					char buf[2];

					/*
					 * Echo input using puts() to force an
					 * LCD flush if we are using an LCD
					 */
					++col;
					buf[0] = c;
					buf[1] = '\0';
					my_puts(buf);
				}
				*p++ = c;
				++n;
			} else {			/* Buffer full */
				putchar('\a');
			}
		}
	}
#endif /* CONFIG_CMDLINE_EDITING */
}

int cli_readline(const FLASH 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);
}
Commit	Line	Data
d684c216 L	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"
	13
d684c216 L	14	#include <string.h>
	15	#include <stdio.h>
	16
	17	#include "config.h"
	18	#include "con-utils.h"
	19	#include "command.h"
	20	#include "cli_readline.h"
	21
	22	char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
	23
	24	static const FLASH char erase_seq[] = "\b \b"; /* erase sequence */
	25	static const FLASH char tab_seq[] = " "; /* used to expand TABs */
	26
	27	#ifndef CONFIG_CMDLINE_EDITING
	28	static char delete_char (char buffer, char p, int colp, int *np, int plen)
	29	{
	30	char *s;
	31
	32	if (*np == 0)
	33	return p;
	34
	35	if ((--p) == '\t') { / will retype the whole line */
	36	while (*colp > plen) {
	37	my_puts_P(erase_seq);
	38	(*colp)--;
	39	}
	40	for (s = buffer; s < p; ++s) {
	41	if (*s == '\t') {
	42	my_puts_P(tab_seq + ((*colp) & 07));
	43	colp += 8 - ((colp) & 07);
	44	} else {
	45	++(*colp);
	46	putchar(*s);
	47	}
	48	}
	49	} else {
	50	my_puts_P(erase_seq);
	51	(*colp)--;
	52	}
	53	(*np)--;
	54
	55	return p;
	56	}
	57	#endif /* CONFIG_CMDLINE_EDITING */
	58
	59
	60	#ifdef CONFIG_CMDLINE_EDITING
	61
	62	/*
	63	* cmdline-editing related codes from vivi.
	64	* Author: Janghoon Lyu <nandy@mizi.com>
	65	*/
	66
	67	#define putnstr(str, n) printf_P(PSTR("%.*s"), (int)n, str)
	68
	69	#define CTL_CH(c) ((c) - 'a' + 1)
	70	#define CTL_BACKSPACE ('\b')
	71	#define DEL ((char)255)
	72	#define DEL7 ((char)127)
	73	#define CREAD_HIST_CHAR ('!')
	74
	75	#define getcmd_putch(ch) putchar(ch)
424b184a	76	#define getcmd_getch() my_getchar(1)
d684c216 L	77	#define getcmd_cbeep() getcmd_putch('\a')
	78
	79	#define HIST_MAX 5
	80	#define HIST_SIZE CONFIG_SYS_CBSIZE
	81
	82	static int hist_max;
	83	static int hist_add_idx;
	84	static int hist_cur = -1;
	85	static unsigned hist_num;
	86
	87	static char *hist_list[HIST_MAX];
	88	static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
	89
	90	#define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
	91
	92	static void hist_init(void)
	93	{
	94	int i;
	95
	96	hist_max = 0;
	97	hist_add_idx = 0;
	98	hist_cur = -1;
	99	hist_num = 0;
	100
	101	for (i = 0; i < HIST_MAX; i++) {
	102	hist_list[i] = hist_lines[i];
	103	hist_list[i][0] = '\0';
	104	}
	105	}
	106
	107	static void cread_add_to_hist(char *line)
	108	{
	109	strcpy(hist_list[hist_add_idx], line);
	110
	111	if (++hist_add_idx >= HIST_MAX)
	112	hist_add_idx = 0;
	113
	114	if (hist_add_idx > hist_max)
	115	hist_max = hist_add_idx;
	116
	117	hist_num++;
	118	}
	119
	120	static char *hist_prev(void)
	121	{
	122	char *ret;
	123	int old_cur;
	124
	125	if (hist_cur < 0)
	126	return NULL;
	127
	128	old_cur = hist_cur;
	129	if (--hist_cur < 0)
	130	hist_cur = hist_max;
	131
	132	if (hist_cur == hist_add_idx) {
	133	hist_cur = old_cur;
	134	ret = NULL;
	135	} else {
	136	ret = hist_list[hist_cur];
	137	}
	138
	139	return ret;
	140	}
141
142	static char *hist_next(void)
143	{
144	char *ret;
145
146	if (hist_cur < 0)
147	return NULL;
148
149	if (hist_cur == hist_add_idx)
150	return NULL;
151
152	if (++hist_cur > hist_max)
153	hist_cur = 0;
154
155	if (hist_cur == hist_add_idx)
156	ret = "";
157	else
158	ret = hist_list[hist_cur];
159
160	return ret;
161	}
162
163	#ifndef CONFIG_CMDLINE_EDITING
164	static void cread_print_hist_list(void)
165	{
166	int i;
167	unsigned n;
168
169	n = hist_num - hist_max;
170
171	i = hist_add_idx + 1;
172	while (1) {
173	if (i > hist_max)
174	i = 0;
175	if (i == hist_add_idx)
176	break;
177	printf_P(PSTR("%s\n"), hist_list[i]);
178	n++;
179	i++;
180	}
181	}
182	#endif /* CONFIG_CMDLINE_EDITING */
183
184	#define BEGINNING_OF_LINE() { \
185	while (num) { \
186	getcmd_putch(CTL_BACKSPACE); \
187	num--; \
188	} \
189	}
190
191	#define ERASE_TO_EOL() { \
192	if (num < eol_num) { \
193	printf_P(PSTR("%*S"), (int)(eol_num - num), PSTR("")); \
194	do { \
195	getcmd_putch(CTL_BACKSPACE); \
196	} while (--eol_num > num); \
197	} \
198	}
199
200	#define REFRESH_TO_EOL() { \
201	if (num < eol_num) { \
202	wlen = eol_num - num; \
203	putnstr(buf + num, wlen); \
204	num = eol_num; \
205	} \
206	}
207
208	static void cread_add_char(char ichar, int insert, unsigned long *num,
209	unsigned long eol_num, char buf, unsigned long len)
210	{
211	unsigned long wlen;
212
213	/* room ??? */
214	if (insert \|\| num == eol_num) {
215	if (*eol_num > len - 1) {
216	getcmd_cbeep();
217	return;
218	}
219	(*eol_num)++;
220	}
221
222	if (insert) {
223	wlen = eol_num - num;
224	if (wlen > 1)
225	memmove(&buf[num+1], &buf[num], wlen-1);
226
227	buf[*num] = ichar;
228	putnstr(buf + *num, wlen);
229	(*num)++;
230	while (--wlen)
231	getcmd_putch(CTL_BACKSPACE);
232	} else {
233	/* echo the character */
234	wlen = 1;
235	buf[*num] = ichar;
236	putnstr(buf + *num, wlen);
237	(*num)++;
238	}
239	}
240
241	static void cread_add_str(char *str, int strsize, int insert,
242	unsigned long num, unsigned long eol_num,
243	char *buf, unsigned long len)
244	{
245	while (strsize--) {
246	cread_add_char(*str, insert, num, eol_num, buf, len);
247	str++;
248	}
249	}
250
251	static int cread_line(const FLASH char const prompt, char buf, unsigned int *len)
252	{
253	unsigned long num = 0;
254	unsigned long eol_num = 0;
255	unsigned long wlen;
256	char ichar;
257	int insert = 1;
258	int esc_len = 0;
259	char esc_save[8];
260	int init_len = strlen(buf);
261
262	(void) prompt;
263
264	if (init_len)
265	cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
266
267	while (1) {
268	ichar = getcmd_getch();
269
270	if ((ichar == '\n') \|\| (ichar == '\r')) {
271	putchar('\n');
272	break;
273	}
274
275	/*
276	* handle standard linux xterm esc sequences for arrow key, etc.
277	*/
278	if (esc_len != 0) {
279	if (esc_len == 1) {
280	if (ichar == '[') {
281	esc_save[esc_len] = ichar;
282	esc_len = 2;
283	} else {
284	cread_add_str(esc_save, esc_len,
285	insert, &num, &eol_num,
286	buf, *len);
287	esc_len = 0;
288	}
289	continue;
290	}
291
292	switch (ichar) {
293	case 'D': /* <- key */
294	ichar = CTL_CH('b');
295	esc_len = 0;
296	break;
297	case 'C': /* -> key */
298	ichar = CTL_CH('f');
299	esc_len = 0;
300	break; /* pass off to ^F handler */
301	case 'H': /* Home key */
302	ichar = CTL_CH('a');
303	esc_len = 0;
304	break; /* pass off to ^A handler */
305	case 'A': /* up arrow */
306	ichar = CTL_CH('p');
307	esc_len = 0;
308	break; /* pass off to ^P handler */
309	case 'B': /* down arrow */
310	ichar = CTL_CH('n');
311	esc_len = 0;
312	break; /* pass off to ^N handler */
313	default:
314	esc_save[esc_len++] = ichar;
315	cread_add_str(esc_save, esc_len, insert,
316	&num, &eol_num, buf, *len);
317	esc_len = 0;
318	continue;
319	}
320	}
321
322	switch (ichar) {
323	case 0x1b:
324	if (esc_len == 0) {
325	esc_save[esc_len] = ichar;
326	esc_len = 1;
327	} else {
328	my_puts_P(PSTR("impossible condition #876\n"));
329	esc_len = 0;
330	}
331	break;
332
333	case CTL_CH('a'):
334	BEGINNING_OF_LINE();
335	break;
336	case CTL_CH('c'): /* ^C - break */
337	buf = '\0'; / discard input */
338	return -1;
339	case CTL_CH('f'):
340	if (num < eol_num) {
341	getcmd_putch(buf[num]);
342	num++;
343	}
344	break;
345	case CTL_CH('b'):
346	if (num) {
347	getcmd_putch(CTL_BACKSPACE);
348	num--;
349	}
350	break;
351	case CTL_CH('d'):
352	if (num < eol_num) {
353	wlen = eol_num - num - 1;
354	if (wlen) {
355	memmove(&buf[num], &buf[num+1], wlen);
356	putnstr(buf + num, wlen);
357	}
358
359	getcmd_putch(' ');
360	do {
361	getcmd_putch(CTL_BACKSPACE);
362	} while (wlen--);
363	eol_num--;
364	}
365	break;
366	case CTL_CH('k'):
367	ERASE_TO_EOL();
368	break;
369	case CTL_CH('e'):
370	REFRESH_TO_EOL();
371	break;
372	case CTL_CH('o'):
373	insert = !insert;
374	break;
375	case CTL_CH('x'):
376	case CTL_CH('u'):
377	BEGINNING_OF_LINE();
378	ERASE_TO_EOL();
379	break;
380	case DEL:
381	case DEL7:
382	case 8:
383	if (num) {
384	wlen = eol_num - num;
385	num--;
386	memmove(&buf[num], &buf[num+1], wlen);
387	getcmd_putch(CTL_BACKSPACE);
388	putnstr(buf + num, wlen);
389	getcmd_putch(' ');
390	do {
391	getcmd_putch(CTL_BACKSPACE);
392	} while (wlen--);
393	eol_num--;
394	}
395	break;
396	case CTL_CH('p'):
397	case CTL_CH('n'):
398	{
399	char *hline;
400
401	esc_len = 0;
402
403	if (ichar == CTL_CH('p'))
404	hline = hist_prev();
405	else
406	hline = hist_next();
407
408	if (!hline) {
409	getcmd_cbeep();
410	continue;
411	}
412
413	/* nuke the current line */
414	/* first, go home */
415	BEGINNING_OF_LINE();
416
417	/* erase to end of line */
418	ERASE_TO_EOL();
419
420	/* copy new line into place and display */
421	strcpy(buf, hline);
422	eol_num = strlen(buf);
423	REFRESH_TO_EOL();
424	continue;
425	}
426	#ifdef CONFIG_AUTO_COMPLETE
427	case '\t': {
428	int num2, col;
429
430	/* do not autocomplete when in the middle */
431	if (num < eol_num) {
432	getcmd_cbeep();
433	break;
434	}
435
436	buf[num] = '\0';
437	col = strlen_P(prompt) + eol_num;
438	num2 = num;
439	if (cmd_auto_complete(prompt, buf, &num2, &col)) {
440	col = num2 - num;
441	num += col;
442	eol_num += col;
443	}
444	break;
445	}
446	#endif
447	default:
448	cread_add_char(ichar, insert, &num, &eol_num, buf,
449	*len);
450	break;
451	}
452	}
453	*len = eol_num;
454	buf[eol_num] = '\0'; /* lose the newline */
455
456	if (buf[0] && buf[0] != CREAD_HIST_CHAR)
457	cread_add_to_hist(buf);
458	hist_cur = hist_add_idx;
459
460	return 0;
461	}
462
463	#endif /* CONFIG_CMDLINE_EDITING */
464
465	/****************************************************************************/
466
467	static int cli_readline_into_buffer(const FLASH char const prompt, char buffer)
468	{
469	char *p = buffer;
470	#ifdef CONFIG_CMDLINE_EDITING
471	unsigned int len = CONFIG_SYS_CBSIZE;
472	int rc;
473	static int initted;
474
475	if (!initted) {
476	hist_init();
477	initted = 1;
478	}
479
480	if (prompt)
481	my_puts_P(prompt);
482
483	rc = cread_line(prompt, p, &len);
484	return rc < 0 ? rc : (int) len;
485
486	#else /* CONFIG_CMDLINE_EDITING */
487	char *p_buf = p;
488	int n = 0; /* buffer index */
489	int plen = 0; /* prompt length */
490	int col; /* output column cnt */
491	char c;
492
493	/* print prompt */
494	if (prompt) {
495	plen = strlen_P(prompt);
496	my_puts_P(prompt);
497	}
498	col = plen;
499
500	for (;;) {
501
424b184a	502	c = my_getchar(1);
d684c216 L	503
	504	/*
	505	* Special character handling
	506	*/
	507	switch (c) {
	508	case '\r': /* Enter */
	509	case '\n':
	510	*p = '\0';
	511	my_puts_P(PSTR("\r\n"));
	512	return p - p_buf;
	513
	514	case '\0': /* nul */
	515	continue;
	516
	517	case 0x03: /* ^C - break */
	518	p_buf[0] = '\0'; /* discard input */
	519	return -1;
	520
	521	case 0x15: /* ^U - erase line */
	522	while (col > plen) {
	523	my_puts_P(erase_seq);
	524	--col;
	525	}
	526	p = p_buf;
	527	n = 0;
	528	continue;
	529
	530	case 0x17: /* ^W - erase word */
	531	p = delete_char(p_buf, p, &col, &n, plen);
	532	while ((n > 0) && (*p != ' '))
	533	p = delete_char(p_buf, p, &col, &n, plen);
	534	continue;
	535
	536	case 0x08: /* ^H - backspace */
	537	case 0x7F: /* DEL - backspace */
	538	p = delete_char(p_buf, p, &col, &n, plen);
	539	continue;
	540
	541	default:
	542	/*
	543	* Must be a normal character then
	544	*/
	545	if (n < CONFIG_SYS_CBSIZE-2) {
	546	if (c == '\t') { /* expand TABs */
	547	#ifdef CONFIG_AUTO_COMPLETE
	548	/*
	549	* if auto completion triggered just
	550	* continue
	551	*/
	552	*p = '\0';
	553	if (cmd_auto_complete(prompt,
	554	console_buffer,
	555	&n, &col)) {
	556	p = p_buf + n; /* reset */
	557	continue;
	558	}
	559	#endif
	560	my_puts_P(tab_seq + (col & 07));
	561	col += 8 - (col & 07);
	562	} else {
	563	char buf[2];
	564
	565	/*
	566	* Echo input using puts() to force an
567	* LCD flush if we are using an LCD
568	*/
569	++col;
570	buf[0] = c;
571	buf[1] = '\0';
572	my_puts(buf);
573	}
574	*p++ = c;
575	++n;
576	} else { /* Buffer full */
577	putchar('\a');
578	}
579	}
580	}
581	#endif /* CONFIG_CMDLINE_EDITING */
582	}
583
584	int cli_readline(const FLASH char *const prompt)
585	{
586	/*
587	* If console_buffer isn't 0-length the user will be prompted to modify
588	* it instead of entering it from scratch as desired.
589	*/
590	console_buffer[0] = '\0';
591
592	return cli_readline_into_buffer(prompt, console_buffer);
593	}
594