[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>
 */

static void putnstr(char *str, int n)
{
	/* printf_P(PSTR("%.*s"), (int)n, str) */
	while (n--)
		putchar(*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("")); */           \
		print_blanks(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 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
e1a50c19 L	67	static void putnstr(char *str, int n)
	68	{
	69	/* printf_P(PSTR("%.s"), (int)n, str) /
	70	while (n--)
	71	putchar(*str++);
	72	}
d684c216	73
e1a50c19 L	74
e1a50c19 L	75	#define CTL_CH(c) ((c) - 'a' + 1)
d684c216	76	#define CTL_BACKSPACE ('\b')
e1a50c19 L	77	#define DEL ((char)255)
e1a50c19 L	78	#define DEL7 ((char)127)
d684c216 L	79	#define CREAD_HIST_CHAR ('!')
	80
	81	#define getcmd_putch(ch) putchar(ch)
424b184a	82	#define getcmd_getch() my_getchar(1)
d684c216 L	83	#define getcmd_cbeep() getcmd_putch('\a')
d684c216 L	84
e1a50c19 L	85	#define HIST_MAX 5
e1a50c19 L	86	#define HIST_SIZE CONFIG_SYS_CBSIZE
d684c216 L	87
	88	static int hist_max;
	89	static int hist_add_idx;
	90	static int hist_cur = -1;
	91	static unsigned hist_num;
	92
	93	static char *hist_list[HIST_MAX];
	94	static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
	95
	96	#define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
	97
	98	static void hist_init(void)
	99	{
	100	int i;
	101
	102	hist_max = 0;
	103	hist_add_idx = 0;
	104	hist_cur = -1;
	105	hist_num = 0;
	106
	107	for (i = 0; i < HIST_MAX; i++) {
	108	hist_list[i] = hist_lines[i];
	109	hist_list[i][0] = '\0';
	110	}
	111	}
	112
	113	static void cread_add_to_hist(char *line)
	114	{
	115	strcpy(hist_list[hist_add_idx], line);
	116
	117	if (++hist_add_idx >= HIST_MAX)
	118	hist_add_idx = 0;
	119
	120	if (hist_add_idx > hist_max)
	121	hist_max = hist_add_idx;
	122
	123	hist_num++;
	124	}
	125
	126	static char *hist_prev(void)
	127	{
	128	char *ret;
	129	int old_cur;
	130
	131	if (hist_cur < 0)
	132	return NULL;
	133
	134	old_cur = hist_cur;
	135	if (--hist_cur < 0)
	136	hist_cur = hist_max;
	137
	138	if (hist_cur == hist_add_idx) {
	139	hist_cur = old_cur;
	140	ret = NULL;
	141	} else {
	142	ret = hist_list[hist_cur];
	143	}
	144
	145	return ret;
	146	}
	147
	148	static char *hist_next(void)
	149	{
	150	char *ret;
151
152	if (hist_cur < 0)
153	return NULL;
154
155	if (hist_cur == hist_add_idx)
156	return NULL;
157
158	if (++hist_cur > hist_max)
159	hist_cur = 0;
160
161	if (hist_cur == hist_add_idx)
162	ret = "";
163	else
164	ret = hist_list[hist_cur];
165
166	return ret;
167	}
168
169	#ifndef CONFIG_CMDLINE_EDITING
170	static void cread_print_hist_list(void)
171	{
172	int i;
173	unsigned n;
174
175	n = hist_num - hist_max;
176
177	i = hist_add_idx + 1;
178	while (1) {
179	if (i > hist_max)
180	i = 0;
181	if (i == hist_add_idx)
182	break;
183	printf_P(PSTR("%s\n"), hist_list[i]);
184	n++;
185	i++;
186	}
187	}
188	#endif /* CONFIG_CMDLINE_EDITING */
189
e1a50c19 L	190	#define BEGINNING_OF_LINE() { \
	191	while (num) { \
	192	getcmd_putch(CTL_BACKSPACE); \
	193	num--; \
	194	} \
d684c216 L	195	}
d684c216 L	196
e1a50c19 L	197	#define ERASE_TO_EOL() { \
	198	if (num < eol_num) { \
	199	/* printf_P(PSTR("%S"), (int)(eol_num - num), PSTR("")); / \
	200	print_blanks(eol_num - num); \
	201	do { \
	202	getcmd_putch(CTL_BACKSPACE); \
	203	} while (--eol_num > num); \
	204	} \
d684c216 L	205	}
d684c216 L	206
e1a50c19 L	207	#define REFRESH_TO_EOL() { \
	208	if (num < eol_num) { \
	209	wlen = eol_num - num; \
	210	putnstr(buf + num, wlen); \
	211	num = eol_num; \
	212	} \
d684c216 L	213	}
	214
	215	static void cread_add_char(char ichar, int insert, unsigned long *num,
	216	unsigned long eol_num, char buf, unsigned long len)
	217	{
	218	unsigned long wlen;
	219
	220	/* room ??? */
	221	if (insert \|\| num == eol_num) {
	222	if (*eol_num > len - 1) {
	223	getcmd_cbeep();
	224	return;
	225	}
	226	(*eol_num)++;
	227	}
	228
	229	if (insert) {
	230	wlen = eol_num - num;
	231	if (wlen > 1)
	232	memmove(&buf[num+1], &buf[num], wlen-1);
	233
	234	buf[*num] = ichar;
	235	putnstr(buf + *num, wlen);
	236	(*num)++;
	237	while (--wlen)
	238	getcmd_putch(CTL_BACKSPACE);
	239	} else {
	240	/* echo the character */
	241	wlen = 1;
	242	buf[*num] = ichar;
	243	putnstr(buf + *num, wlen);
	244	(*num)++;
	245	}
	246	}
	247
	248	static void cread_add_str(char *str, int strsize, int insert,
	249	unsigned long num, unsigned long eol_num,
	250	char *buf, unsigned long len)
	251	{
	252	while (strsize--) {
	253	cread_add_char(*str, insert, num, eol_num, buf, len);
	254	str++;
	255	}
	256	}
	257
	258	static int cread_line(const FLASH char const prompt, char buf, unsigned int *len)
	259	{
	260	unsigned long num = 0;
	261	unsigned long eol_num = 0;
	262	unsigned long wlen;
	263	char ichar;
	264	int insert = 1;
	265	int esc_len = 0;
	266	char esc_save[8];
	267	int init_len = strlen(buf);
	268
	269	(void) prompt;
	270
	271	if (init_len)
	272	cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
	273
	274	while (1) {
	275	ichar = getcmd_getch();
	276
277	if ((ichar == '\n') \|\| (ichar == '\r')) {
278	putchar('\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	my_puts_P(PSTR("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_P(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
474	static int cli_readline_into_buffer(const FLASH char const prompt, char buffer)
475	{
476	char *p = buffer;
477	#ifdef CONFIG_CMDLINE_EDITING
478	unsigned int len = CONFIG_SYS_CBSIZE;
479	int rc;
480	static int initted;
481
482	if (!initted) {
483	hist_init();
484	initted = 1;
485	}
486
487	if (prompt)
488	my_puts_P(prompt);
489
490	rc = cread_line(prompt, p, &len);
491	return rc < 0 ? rc : (int) len;
492
493	#else /* CONFIG_CMDLINE_EDITING */
494	char *p_buf = p;
495	int n = 0; /* buffer index */
496	int plen = 0; /* prompt length */
497	int col; /* output column cnt */
498	char c;
499
500	/* print prompt */
501	if (prompt) {
502	plen = strlen_P(prompt);
503	my_puts_P(prompt);
504	}
505	col = plen;
506
507	for (;;) {
508
424b184a	509	c = my_getchar(1);
d684c216 L	510
	511	/*
	512	* Special character handling
	513	*/
	514	switch (c) {
	515	case '\r': /* Enter */
	516	case '\n':
	517	*p = '\0';
	518	my_puts_P(PSTR("\r\n"));
	519	return p - p_buf;
	520
	521	case '\0': /* nul */
	522	continue;
	523
	524	case 0x03: /* ^C - break */
	525	p_buf[0] = '\0'; /* discard input */
	526	return -1;
	527
	528	case 0x15: /* ^U - erase line */
	529	while (col > plen) {
	530	my_puts_P(erase_seq);
	531	--col;
	532	}
	533	p = p_buf;
	534	n = 0;
	535	continue;
	536
	537	case 0x17: /* ^W - erase word */
	538	p = delete_char(p_buf, p, &col, &n, plen);
	539	while ((n > 0) && (*p != ' '))
	540	p = delete_char(p_buf, p, &col, &n, plen);
	541	continue;
	542
	543	case 0x08: /* ^H - backspace */
	544	case 0x7F: /* DEL - backspace */
	545	p = delete_char(p_buf, p, &col, &n, plen);
	546	continue;
	547
	548	default:
	549	/*
	550	* Must be a normal character then
	551	*/
	552	if (n < CONFIG_SYS_CBSIZE-2) {
	553	if (c == '\t') { /* expand TABs */
	554	#ifdef CONFIG_AUTO_COMPLETE
	555	/*
	556	* if auto completion triggered just
	557	* continue
	558	*/
	559	*p = '\0';
	560	if (cmd_auto_complete(prompt,
	561	console_buffer,
	562	&n, &col)) {
	563	p = p_buf + n; /* reset */
	564	continue;
	565	}
	566	#endif
	567	my_puts_P(tab_seq + (col & 07));
	568	col += 8 - (col & 07);
	569	} else {
	570	char buf[2];
	571
	572	/*
	573	* Echo input using puts() to force an
574	* LCD flush if we are using an LCD
575	*/
576	++col;
577	buf[0] = c;
578	buf[1] = '\0';
579	my_puts(buf);
580	}
581	*p++ = c;
582	++n;
583	} else { /* Buffer full */
584	putchar('\a');
585	}
586	}
587	}
588	#endif /* CONFIG_CMDLINE_EDITING */
589	}
590
591	int cli_readline(const FLASH char *const prompt)
592	{
593	/*
594	* If console_buffer isn't 0-length the user will be prompted to modify
595	* it instead of entering it from scratch as desired.
596	*/
597	console_buffer[0] = '\0';
598
599	return cli_readline_into_buffer(prompt, console_buffer);
600	}