[z180-stamp.git] / avr / cli_readline.c

/*
 * (C) Copyright 2014-2016 Leo C. <erbl259-lmu@yahoo.de>
 *
 * (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 "cli_readline.h"
#include "common.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <ctype.h>

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


/************************************************************************************************/
/* TODO:
 *
 */

#define ESC						0x1b

#define KEY_TAB                 '\t'                                                // TAB key
#define KEY_CR                  '\r'                                                // RETURN key
#define KEY_BACKSPACE           '\b'                                                // Backspace key
#define KEY_ESCAPE              0x1B                                                // ESCAPE (pressed twice)

#define KEY_DOWN                0x80                                                // Down arrow key
#define KEY_UP                  0x81                                                // Up arrow key
#define KEY_LEFT                0x82                                                // Left arrow key
#define KEY_RIGHT               0x83                                                // Right arrow key
#define KEY_HOME                0x84                                                // Home key
#define KEY_DC                  0x85                                                // Delete character key
#define KEY_IC                  0x86                                                // Ins char/toggle ins mode key
#define KEY_NPAGE               0x87                                                // Next-page key
#define KEY_PPAGE               0x88                                                // Previous-page key
#define KEY_END                 0x89                                                // End key
#define KEY_BTAB                0x8A                                                // Back tab key
#define KEY_F1                  0x8B                                                // Function key F1
#define KEY_F(n)                (KEY_F1+(n)-1)                                      // Space for additional 12 function keys


struct fkey_tbl_s {
	const FLASH char *sequence;		/* ESC Sequence	*/
	int	code;						/* Keycode	*/
};

//typedef const FLASH struct fkey_tbl_s fkey_tbl_t;

#define FKEY_TBL_ITEM(_seq, _code)		{ FSTR(#_seq), _code }


static const FLASH struct fkey_tbl_s fkey_table[] = {

FKEY_TBL_ITEM(B,   KEY_DOWN),			// Down arrow key
FKEY_TBL_ITEM(A,   KEY_UP),			// Up arrow key
FKEY_TBL_ITEM(D,   KEY_LEFT),			// Left arrow key
FKEY_TBL_ITEM(C,   KEY_RIGHT),		// Right arrow key
FKEY_TBL_ITEM(1~,  KEY_HOME),			// Home key
FKEY_TBL_ITEM(3~,  KEY_DC),			// Delete character key
FKEY_TBL_ITEM(2~,  KEY_IC),			// Ins char/toggle ins mode key
FKEY_TBL_ITEM(6~,  KEY_NPAGE),		// Next-page key
FKEY_TBL_ITEM(5~,  KEY_PPAGE),		// Previous-page key
FKEY_TBL_ITEM(4~,  KEY_END),			// End key
FKEY_TBL_ITEM(Z,   KEY_BTAB),			// Back tab key
/* VT400: */
FKEY_TBL_ITEM(11~, KEY_F(1)),			// Function key F1
FKEY_TBL_ITEM(12~, KEY_F(2)),			// Function key F2
FKEY_TBL_ITEM(13~, KEY_F(3)),			// Function key F3
FKEY_TBL_ITEM(14~, KEY_F(4)),			// Function key F4
FKEY_TBL_ITEM(15~, KEY_F(5)),			// Function key F5
/* Linux consoe */
FKEY_TBL_ITEM([A,  KEY_F(1)),			// Function key F1
FKEY_TBL_ITEM([B,  KEY_F(2)),			// Function key F2
FKEY_TBL_ITEM([C,  KEY_F(3)),			// Function key F3
FKEY_TBL_ITEM([D,  KEY_F(4)),			// Function key F4
FKEY_TBL_ITEM([E,  KEY_F(5)),			// Function key F5

FKEY_TBL_ITEM(17~, KEY_F(6)),			// Function key F6
FKEY_TBL_ITEM(18~, KEY_F(7)),			// Function key F7
FKEY_TBL_ITEM(19~, KEY_F(8)),			// Function key F8
FKEY_TBL_ITEM(20~, KEY_F(9)),			// Function key F9
FKEY_TBL_ITEM(21~, KEY_F(10)),		// Function key F10
FKEY_TBL_ITEM(23~, KEY_F(11)),		// Function key F11
FKEY_TBL_ITEM(24~, KEY_F(12)),		// Function key F12
{ NULL }	/* Mark end of table */
};


typedef enum {
	STATE_GROUND,
	STATE_ESCAPE,
	STATE_CSI_ENTRY
} vtparse_state_t;

#define CHB_SIZE 	15

static
int vt_parse (void)
{
	static vtparse_state_t state = STATE_GROUND;
	char	buf[CHB_SIZE+1];
	uint8_t param[2];
	uint8_t i_buf;
	uint8_t i_param;
	int  ch;


	while (1) {
		ch = my_getchar(1);
//		debug_getch(state, ch);

		switch (state) {
		case STATE_GROUND:
			if (ch == ESC) {
				state = STATE_ESCAPE;
				continue;
			}
			if (ch == 0x7F)				// BACKSPACE on VT200 sends DEL char
				ch = KEY_BACKSPACE;		// map it to '\b'
			break;
		case STATE_ESCAPE:
			if (ch < 0)
				continue;

			if (ch == '[') {
				state = STATE_CSI_ENTRY;
				param[0] = param[1] = 0;
				i_buf = 0;
				i_param = 0;
				continue;
			}
			state = STATE_GROUND;
			break;
		case STATE_CSI_ENTRY:
			if (ch < 0)
				continue;

			buf[i_buf] = ch;
			if (i_buf < CHB_SIZE)
				i_buf++;
			if (ch == ';') {
				i_param++;
				continue;
			}
			if (isdigit(ch)) {
				if (i_param < 2)
					param[i_param] = param[i_param] * 10 + ch - '0';
				continue;
			}
			if (ch >= '@' && ch <= '~' && ch != '[') {
				buf[i_buf] = '\0';
				int_fast8_t i = 0;
				while (fkey_table[i].sequence) {
					if (! strcmp_P (buf, fkey_table[i].sequence)) {
						ch = fkey_table[i].code;
						break;
					}
					i++;
				}
				if (fkey_table[i].sequence == NULL) {
					ch = '$'; /* KEY_ESCAPE; */
				}
			}
			state = STATE_GROUND;
			break;
		}
		break; /* while */
	}

	return ch;
}

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


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

/*
 * 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-- && *str)
		putchar(*str++);
}


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

#define getcmd_putch(ch)	putchar(ch)
#define getcmd_getch()		vt_parse()
#define getcmd_cbeep()		getcmd_putch('\a')

#define HIST_MAX			20

static int_fast8_t hist_max;
static int_fast8_t hist_add_idx;
static int_fast8_t hist_cur = -1;

static char *hist_list[HIST_MAX];

static void cread_add_to_hist(char *line)
{
	if (hist_max) {
		int_fast8_t last = hist_add_idx;
		if (--last < 0)
			last = hist_max;

		if (!strcmp(line, hist_list[last]))
			return;
	}

	char *p = strdup(line);
	if (p) {
		free(hist_list[hist_add_idx]);
		hist_list[hist_add_idx] = p;

		if (++hist_add_idx >= HIST_MAX)
			hist_add_idx = 0;

		if (hist_add_idx > hist_max)
			hist_max = hist_add_idx;
	}
}

static char *hist_prev(void)
{
	char *ret;
	int_fast8_t 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;
}


#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, bool insert, uint_fast8_t *num,
	       uint_fast8_t *eol_num, char *buf, uint_fast8_t len)
{
	uint_fast8_t 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, bool insert,
			  uint_fast8_t *num, uint_fast8_t *eol_num,
			  char *buf, uint_fast8_t 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,
			uint_fast8_t *len, bool enable_history)
{
	uint_fast8_t num = 0;
	uint_fast8_t eol_num = 0;
	uint_fast8_t wlen;
	int ichar;
	bool insert = 1;
	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;
		}


		switch (ichar) {

		case KEY_HOME:
		case CTL_CH('a'):
			BEGINNING_OF_LINE();
			break;
		case CTL_CH('c'):			/* ^C - break */
			*buf = '\0';			/* discard input */
			return -1;
		case KEY_RIGHT:
		case CTL_CH('f'):			/* forward-char */
			if (num < eol_num) {
				getcmd_putch(buf[num]);
				num++;
			}
			break;
		case KEY_LEFT:
		case CTL_CH('b'):			/* backward-char */
			if (num) {
				getcmd_putch(CTL_BACKSPACE);
				num--;
			}
			break;
		case KEY_DC:
		case CTL_CH('d'):			/* delete-char */
			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'):			/* kill-line */
			ERASE_TO_EOL();
			break;
		case KEY_END:
		case CTL_CH('e'):
			REFRESH_TO_EOL();
			break;
		case KEY_IC:
		case CTL_CH('o'):
			insert = !insert;
			break;
		case CTL_CH('x'):
		case CTL_CH('u'):			/* kill-whole-line */
			BEGINNING_OF_LINE();
			ERASE_TO_EOL();
			break;
		case DEL:
		case DEL7:
		case 8:						/* backward-delete-char */
			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 KEY_UP:
		case CTL_CH('p'):			/* previous-history */
		case KEY_DOWN:
		case CTL_CH('n'):			/* next-history */
			if (enable_history) {
				char *hline;

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

				if (hline) {
					/* 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();
				} else {
					getcmd_cbeep();
				}
			} else {
				getcmd_cbeep();
			}
			break;
#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:
			if (isprint(ichar))
				cread_add_char(ichar, insert, &num, &eol_num, buf,
								*len);
			break;
		}
	}
	*len = eol_num;
	buf[eol_num] = '\0';	/* lose the newline */

	if (enable_history) {
		if (buf[0])
			cread_add_to_hist(buf);
		hist_cur = hist_add_idx;
	}
	return 0;
}

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

static int cli_readline_into_buffer(const FLASH char *const prompt,
			char *buffer, bool enable_history)
{
	char *p = buffer;
	uint_fast8_t len = CONFIG_SYS_CBSIZE;
	int rc;

	if (prompt)
		my_puts_P(prompt);

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

int cli_readline(const FLASH char *const prompt, bool enable_history)
{
	/*
	 * 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, enable_history);
}
Commit	Line	Data
d684c216	1	/*
04b3ea0e	2	* (C) Copyright 2014-2016 Leo C. <erbl259-lmu@yahoo.de>
35edb766	3	*
d684c216 L	4	* (C) Copyright 2000
	5	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	6	*
	7	* Add to readline cmdline-editing by
	8	* (C) Copyright 2005
	9	* JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
	10	*
f32690e8	11	* SPDX-License-Identifier: GPL-2.0
d684c216 L	12	*/
d684c216 L	13
8ed66016	14	#include "cli_readline.h"
d684c216	15	#include "common.h"
d684c216 L	16	#include <string.h>
d684c216 L	17	#include <stdio.h>
a8b4c964 L	18	#include <stdlib.h>
a8b4c964 L	19	#include <stdbool.h>
8506d791	20	#include <ctype.h>
d684c216 L	21
	22	#include "config.h"
	23	#include "con-utils.h"
8591c65b	24	#include "print-utils.h"
d684c216	25	#include "command.h"
d684c216	26
8506d791 L	27
	28
	29	/************************************************************************************************/
	30	/* TODO:
	31	*
	32	*/
	33
	34	#define ESC 0x1b
	35
	36	#define KEY_TAB '\t' // TAB key
	37	#define KEY_CR '\r' // RETURN key
	38	#define KEY_BACKSPACE '\b' // Backspace key
	39	#define KEY_ESCAPE 0x1B // ESCAPE (pressed twice)
	40
	41	#define KEY_DOWN 0x80 // Down arrow key
	42	#define KEY_UP 0x81 // Up arrow key
	43	#define KEY_LEFT 0x82 // Left arrow key
	44	#define KEY_RIGHT 0x83 // Right arrow key
	45	#define KEY_HOME 0x84 // Home key
	46	#define KEY_DC 0x85 // Delete character key
	47	#define KEY_IC 0x86 // Ins char/toggle ins mode key
	48	#define KEY_NPAGE 0x87 // Next-page key
	49	#define KEY_PPAGE 0x88 // Previous-page key
	50	#define KEY_END 0x89 // End key
	51	#define KEY_BTAB 0x8A // Back tab key
	52	#define KEY_F1 0x8B // Function key F1
	53	#define KEY_F(n) (KEY_F1+(n)-1) // Space for additional 12 function keys
	54
	55
	56	struct fkey_tbl_s {
	57	const FLASH char sequence; / ESC Sequence */
	58	int code; /* Keycode */
	59	};
	60
	61	//typedef const FLASH struct fkey_tbl_s fkey_tbl_t;
	62
	63	#define FKEY_TBL_ITEM(_seq, _code) { FSTR(#_seq), _code }
	64
	65
	66
	67	static const FLASH struct fkey_tbl_s fkey_table[] = {
	68
	69	FKEY_TBL_ITEM(B, KEY_DOWN), // Down arrow key
	70	FKEY_TBL_ITEM(A, KEY_UP), // Up arrow key
	71	FKEY_TBL_ITEM(D, KEY_LEFT), // Left arrow key
	72	FKEY_TBL_ITEM(C, KEY_RIGHT), // Right arrow key
	73	FKEY_TBL_ITEM(1~, KEY_HOME), // Home key
	74	FKEY_TBL_ITEM(3~, KEY_DC), // Delete character key
	75	FKEY_TBL_ITEM(2~, KEY_IC), // Ins char/toggle ins mode key
	76	FKEY_TBL_ITEM(6~, KEY_NPAGE), // Next-page key
	77	FKEY_TBL_ITEM(5~, KEY_PPAGE), // Previous-page key
	78	FKEY_TBL_ITEM(4~, KEY_END), // End key
	79	FKEY_TBL_ITEM(Z, KEY_BTAB), // Back tab key
	80	/* VT400: */
	81	FKEY_TBL_ITEM(11~, KEY_F(1)), // Function key F1
	82	FKEY_TBL_ITEM(12~, KEY_F(2)), // Function key F2
	83	FKEY_TBL_ITEM(13~, KEY_F(3)), // Function key F3
	84	FKEY_TBL_ITEM(14~, KEY_F(4)), // Function key F4
	85	FKEY_TBL_ITEM(15~, KEY_F(5)), // Function key F5
	86	/* Linux consoe */
	87	FKEY_TBL_ITEM([A, KEY_F(1)), // Function key F1
	88	FKEY_TBL_ITEM([B, KEY_F(2)), // Function key F2
	89	FKEY_TBL_ITEM([C, KEY_F(3)), // Function key F3
	90	FKEY_TBL_ITEM([D, KEY_F(4)), // Function key F4
91	FKEY_TBL_ITEM([E, KEY_F(5)), // Function key F5
92
93	FKEY_TBL_ITEM(17~, KEY_F(6)), // Function key F6
94	FKEY_TBL_ITEM(18~, KEY_F(7)), // Function key F7
95	FKEY_TBL_ITEM(19~, KEY_F(8)), // Function key F8
96	FKEY_TBL_ITEM(20~, KEY_F(9)), // Function key F9
97	FKEY_TBL_ITEM(21~, KEY_F(10)), // Function key F10
98	FKEY_TBL_ITEM(23~, KEY_F(11)), // Function key F11
99	FKEY_TBL_ITEM(24~, KEY_F(12)), // Function key F12
100	{ NULL } /* Mark end of table */
101	};
102
103
104
105	typedef enum {
106	STATE_GROUND,
107	STATE_ESCAPE,
108	STATE_CSI_ENTRY
109	} vtparse_state_t;
110
111	#define CHB_SIZE 15
112
113	static
114	int vt_parse (void)
115	{
116	static vtparse_state_t state = STATE_GROUND;
117	char buf[CHB_SIZE+1];
118	uint8_t param[2];
119	uint8_t i_buf;
120	uint8_t i_param;
121	int ch;
122
123
124	while (1) {
125	ch = my_getchar(1);
126	// debug_getch(state, ch);
127
128	switch (state) {
129	case STATE_GROUND:
130	if (ch == ESC) {
131	state = STATE_ESCAPE;
132	continue;
133	}
134	if (ch == 0x7F) // BACKSPACE on VT200 sends DEL char
135	ch = KEY_BACKSPACE; // map it to '\b'
136	break;
137	case STATE_ESCAPE:
138	if (ch < 0)
139	continue;
140
141	if (ch == '[') {
142	state = STATE_CSI_ENTRY;
143	param[0] = param[1] = 0;
144	i_buf = 0;
145	i_param = 0;
146	continue;
147	}
148	state = STATE_GROUND;
149	break;
150	case STATE_CSI_ENTRY:
151	if (ch < 0)
152	continue;
153
154	buf[i_buf] = ch;
155	if (i_buf < CHB_SIZE)
156	i_buf++;
157	if (ch == ';') {
158	i_param++;
159	continue;
160	}
161	if (isdigit(ch)) {
162	if (i_param < 2)
163	param[i_param] = param[i_param] * 10 + ch - '0';
164	continue;
165	}
166	if (ch >= '@' && ch <= '~' && ch != '[') {
167	buf[i_buf] = '\0';
168	int_fast8_t i = 0;
169	while (fkey_table[i].sequence) {
170	if (! strcmp_P (buf, fkey_table[i].sequence)) {
171	ch = fkey_table[i].code;
172	break;
173	}
174	i++;
175	}
176	if (fkey_table[i].sequence == NULL) {
177	ch = '$'; /* KEY_ESCAPE; */
178	}
179	}
180	state = STATE_GROUND;
181	break;
182	}
183	break; /* while */
184	}
185
186	return ch;
187	}
188
189	/************************************************************************************************/
190
191
d684c216 L	192	char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
d684c216 L	193
d684c216 L	194	/*
	195	* cmdline-editing related codes from vivi.
	196	* Author: Janghoon Lyu <nandy@mizi.com>
	197	*/
	198
e1a50c19 L	199	static void putnstr(char *str, int n)
	200	{
	201	/* printf_P(PSTR("%.s"), (int)n, str) /
8591c65b	202	while (n-- && *str)
e1a50c19 L	203	putchar(*str++);
e1a50c19 L	204	}
d684c216	205
e1a50c19 L	206
e1a50c19 L	207	#define CTL_CH(c) ((c) - 'a' + 1)
d684c216	208	#define CTL_BACKSPACE ('\b')
e1a50c19 L	209	#define DEL ((char)255)
e1a50c19 L	210	#define DEL7 ((char)127)
d684c216 L	211
d684c216 L	212	#define getcmd_putch(ch) putchar(ch)
8506d791	213	#define getcmd_getch() vt_parse()
d684c216 L	214	#define getcmd_cbeep() getcmd_putch('\a')
d684c216 L	215
a8b4c964	216	#define HIST_MAX 20
d684c216	217
a8b4c964 L	218	static int_fast8_t hist_max;
	219	static int_fast8_t hist_add_idx;
	220	static int_fast8_t hist_cur = -1;
d684c216 L	221
d684c216 L	222	static char *hist_list[HIST_MAX];
d684c216	223
d684c216 L	224	static void cread_add_to_hist(char *line)
d684c216 L	225	{
a8b4c964 L	226	if (hist_max) {
	227	int_fast8_t last = hist_add_idx;
	228	if (--last < 0)
	229	last = hist_max;
d684c216	230
a8b4c964 L	231	if (!strcmp(line, hist_list[last]))
	232	return;
	233	}
d684c216	234
a8b4c964 L	235	char *p = strdup(line);
	236	if (p) {
	237	free(hist_list[hist_add_idx]);
	238	hist_list[hist_add_idx] = p;
d684c216	239
a8b4c964 L	240	if (++hist_add_idx >= HIST_MAX)
	241	hist_add_idx = 0;
	242
	243	if (hist_add_idx > hist_max)
	244	hist_max = hist_add_idx;
	245	}
d684c216 L	246	}
	247
	248	static char *hist_prev(void)
	249	{
	250	char *ret;
a8b4c964	251	int_fast8_t old_cur;
d684c216 L	252
	253	if (hist_cur < 0)
	254	return NULL;
	255
	256	old_cur = hist_cur;
	257	if (--hist_cur < 0)
	258	hist_cur = hist_max;
	259
	260	if (hist_cur == hist_add_idx) {
	261	hist_cur = old_cur;
	262	ret = NULL;
	263	} else {
	264	ret = hist_list[hist_cur];
	265	}
	266
	267	return ret;
	268	}
	269
	270	static char *hist_next(void)
	271	{
	272	char *ret;
	273
	274	if (hist_cur < 0)
	275	return NULL;
	276
	277	if (hist_cur == hist_add_idx)
	278	return NULL;
	279
	280	if (++hist_cur > hist_max)
	281	hist_cur = 0;
	282
	283	if (hist_cur == hist_add_idx)
	284	ret = "";
	285	else
	286	ret = hist_list[hist_cur];
	287
	288	return ret;
	289	}
	290
d684c216	291
e1a50c19 L	292	#define BEGINNING_OF_LINE() { \
	293	while (num) { \
	294	getcmd_putch(CTL_BACKSPACE); \
	295	num--; \
	296	} \
d684c216 L	297	}
d684c216 L	298
e1a50c19 L	299	#define ERASE_TO_EOL() { \
	300	if (num < eol_num) { \
	301	/* printf_P(PSTR("%S"), (int)(eol_num - num), PSTR("")); / \
	302	print_blanks(eol_num - num); \
	303	do { \
	304	getcmd_putch(CTL_BACKSPACE); \
	305	} while (--eol_num > num); \
	306	} \
d684c216 L	307	}
d684c216 L	308
e1a50c19 L	309	#define REFRESH_TO_EOL() { \
	310	if (num < eol_num) { \
	311	wlen = eol_num - num; \
	312	putnstr(buf + num, wlen); \
	313	num = eol_num; \
	314	} \
d684c216 L	315	}
d684c216 L	316
a8b4c964 L	317	static void cread_add_char(char ichar, bool insert, uint_fast8_t *num,
a8b4c964 L	318	uint_fast8_t eol_num, char buf, uint_fast8_t len)
d684c216	319	{
a8b4c964	320	uint_fast8_t wlen;
d684c216 L	321
	322	/* room ??? */
	323	if (insert \|\| num == eol_num) {
	324	if (*eol_num > len - 1) {
	325	getcmd_cbeep();
	326	return;
	327	}
	328	(*eol_num)++;
	329	}
	330
	331	if (insert) {
	332	wlen = eol_num - num;
	333	if (wlen > 1)
	334	memmove(&buf[num+1], &buf[num], wlen-1);
	335
	336	buf[*num] = ichar;
	337	putnstr(buf + *num, wlen);
	338	(*num)++;
	339	while (--wlen)
	340	getcmd_putch(CTL_BACKSPACE);
	341	} else {
	342	/* echo the character */
	343	wlen = 1;
	344	buf[*num] = ichar;
	345	putnstr(buf + *num, wlen);
	346	(*num)++;
	347	}
	348	}
	349
a8b4c964 L	350	static void cread_add_str(char *str, int strsize, bool insert,
	351	uint_fast8_t num, uint_fast8_t eol_num,
	352	char *buf, uint_fast8_t len)
d684c216 L	353	{
	354	while (strsize--) {
	355	cread_add_char(*str, insert, num, eol_num, buf, len);
	356	str++;
	357	}
	358	}
	359
8ed66016 L	360	static int cread_line(const FLASH char const prompt, char buf,
8ed66016 L	361	uint_fast8_t *len, bool enable_history)
d684c216	362	{
a8b4c964 L	363	uint_fast8_t num = 0;
	364	uint_fast8_t eol_num = 0;
	365	uint_fast8_t wlen;
8506d791	366	int ichar;
a8b4c964	367	bool insert = 1;
d684c216 L	368	int init_len = strlen(buf);
	369
	370	(void) prompt;
	371
	372	if (init_len)
	373	cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
	374
	375	while (1) {
	376	ichar = getcmd_getch();
	377
	378	if ((ichar == '\n') \|\| (ichar == '\r')) {
	379	putchar('\n');
	380	break;
	381	}
	382
d684c216 L	383
d684c216 L	384	switch (ichar) {
d684c216	385
8506d791	386	case KEY_HOME:
d684c216 L	387	case CTL_CH('a'):
	388	BEGINNING_OF_LINE();
	389	break;
a8b4c964 L	390	case CTL_CH('c'): /* ^C - break */
a8b4c964 L	391	buf = '\0'; / discard input */
d684c216	392	return -1;
8506d791	393	case KEY_RIGHT:
a8b4c964	394	case CTL_CH('f'): /* forward-char */
d684c216 L	395	if (num < eol_num) {
	396	getcmd_putch(buf[num]);
	397	num++;
	398	}
	399	break;
8506d791	400	case KEY_LEFT:
a8b4c964	401	case CTL_CH('b'): /* backward-char */
d684c216 L	402	if (num) {
	403	getcmd_putch(CTL_BACKSPACE);
	404	num--;
	405	}
	406	break;
8506d791	407	case KEY_DC:
a8b4c964	408	case CTL_CH('d'): /* delete-char */
d684c216 L	409	if (num < eol_num) {
	410	wlen = eol_num - num - 1;
	411	if (wlen) {
	412	memmove(&buf[num], &buf[num+1], wlen);
	413	putnstr(buf + num, wlen);
	414	}
	415
	416	getcmd_putch(' ');
	417	do {
	418	getcmd_putch(CTL_BACKSPACE);
	419	} while (wlen--);
	420	eol_num--;
	421	}
	422	break;
a8b4c964	423	case CTL_CH('k'): /* kill-line */
d684c216 L	424	ERASE_TO_EOL();
d684c216 L	425	break;
ed7d7fd3	426	case KEY_END:
d684c216 L	427	case CTL_CH('e'):
	428	REFRESH_TO_EOL();
	429	break;
8506d791	430	case KEY_IC:
d684c216 L	431	case CTL_CH('o'):
	432	insert = !insert;
	433	break;
	434	case CTL_CH('x'):
a8b4c964	435	case CTL_CH('u'): /* kill-whole-line */
d684c216 L	436	BEGINNING_OF_LINE();
	437	ERASE_TO_EOL();
	438	break;
	439	case DEL:
	440	case DEL7:
a8b4c964	441	case 8: /* backward-delete-char */
d684c216 L	442	if (num) {
	443	wlen = eol_num - num;
	444	num--;
	445	memmove(&buf[num], &buf[num+1], wlen);
	446	getcmd_putch(CTL_BACKSPACE);
	447	putnstr(buf + num, wlen);
	448	getcmd_putch(' ');
	449	do {
	450	getcmd_putch(CTL_BACKSPACE);
	451	} while (wlen--);
	452	eol_num--;
	453	}
	454	break;
8506d791	455	case KEY_UP:
a8b4c964	456	case CTL_CH('p'): /* previous-history */
8506d791	457	case KEY_DOWN:
a8b4c964	458	case CTL_CH('n'): /* next-history */
8ed66016 L	459	if (enable_history) {
	460	char *hline;
	461
	462	if (ichar == CTL_CH('p') \|\| ichar == KEY_UP)
	463	hline = hist_prev();
	464	else
	465	hline = hist_next();
	466
	467	if (hline) {
	468	/* nuke the current line */
	469	/* first, go home */
	470	BEGINNING_OF_LINE();
	471
	472	/* erase to end of line */
	473	ERASE_TO_EOL();
	474
	475	/* copy new line into place and display */
	476	strcpy(buf, hline);
	477	eol_num = strlen(buf);
	478	REFRESH_TO_EOL();
	479	} else {
	480	getcmd_cbeep();
	481	}
	482	} else {
d684c216	483	getcmd_cbeep();
d684c216	484	}
8ed66016	485	break;
d684c216 L	486	#ifdef CONFIG_AUTO_COMPLETE
	487	case '\t': {
	488	int num2, col;
	489
	490	/* do not autocomplete when in the middle */
	491	if (num < eol_num) {
	492	getcmd_cbeep();
	493	break;
	494	}
	495
	496	buf[num] = '\0';
	497	col = strlen_P(prompt) + eol_num;
	498	num2 = num;
	499	if (cmd_auto_complete(prompt, buf, &num2, &col)) {
	500	col = num2 - num;
	501	num += col;
	502	eol_num += col;
	503	}
	504	break;
	505	}
	506	#endif
	507	default:
8506d791 L	508	if (isprint(ichar))
	509	cread_add_char(ichar, insert, &num, &eol_num, buf,
	510	*len);
d684c216 L	511	break;
	512	}
	513	}
	514	*len = eol_num;
	515	buf[eol_num] = '\0'; /* lose the newline */
	516
8ed66016 L	517	if (enable_history) {
	518	if (buf[0])
	519	cread_add_to_hist(buf);
	520	hist_cur = hist_add_idx;
	521	}
d684c216 L	522	return 0;
	523	}
	524
d684c216 L	525	/****************************************************************************/
d684c216 L	526
8ed66016 L	527	static int cli_readline_into_buffer(const FLASH char *const prompt,
8ed66016 L	528	char *buffer, bool enable_history)
d684c216 L	529	{
d684c216 L	530	char *p = buffer;
a8b4c964	531	uint_fast8_t len = CONFIG_SYS_CBSIZE;
d684c216	532	int rc;
d684c216 L	533
	534	if (prompt)
	535	my_puts_P(prompt);
	536
8ed66016	537	rc = cread_line(prompt, p, &len, enable_history);
d684c216	538	return rc < 0 ? rc : (int) len;
d684c216 L	539	}
d684c216 L	540
8ed66016	541	int cli_readline(const FLASH char *const prompt, bool enable_history)
d684c216 L	542	{
	543	/*
	544	* If console_buffer isn't 0-length the user will be prompted to modify
	545	* it instead of entering it from scratch as desired.
	546	*/
	547	console_buffer[0] = '\0';
	548
8ed66016	549	return cli_readline_into_buffer(prompt, console_buffer, enable_history);
d684c216	550	}