/* * vivi/drivers/serial/getcmd_ex.c: extended getcmd() * * Based on bootldr/getcmd.c * * Author: Janghoon Lyu <nandy@mizi.com> * Date  : $Date: 2002/08/20 08:17:09 $ * * $Revision: 1.1 $ */#include <config.h>#include "getcmd.h"#include <serial.h>#include <printk.h>#include <command.h>#include <types.h>#include <string.h>static int hist_max = 0;static int hist_add_idx = 0;static int hist_cur = -1;unsigned hist_num = 0;char* hist_list[HIST_MAX];char hist_lines[HIST_MAX][HIST_SIZE];#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);}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;		printk("%s\n", hist_list[i]);		n++;		i++;	}}#define BEGINNING_OF_LINE() {			\	while (num) {				\		getcmd_putch(CTL_BACKSPACE);	\		num--;				\	}					\}#define ERASE_TO_EOL() {				\	if (num < eol_num) {				\		int tmp;				\		for (tmp = num; tmp < eol_num; tmp++)	\			getcmd_putch(' ');		\		while (tmp-- > num)			\			getcmd_putch(CTL_BACKSPACE);	\		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 intcread_line(char *buf, unsigned int *len){	unsigned long num = 0;	unsigned long eol_num = 0;	unsigned long rlen;	unsigned long wlen;	char ichar;	int insert = 1;	int esc_len = 0;	int rc = 0;	char esc_save[8];	while (1) {		rlen = 1;		ichar = getcmd_getch();		if ((ichar == '\n') || (ichar == '\r')) {			printk("\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 {					printk("impossible condition #876\n");					esc_len = 0;				}				break;			case CTL_CH('a'):				BEGINNING_OF_LINE();				break;			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'):				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;				}			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 (rc);}void getcmd(char *buf, unsigned int len){	static int initted = 0;	if (!initted) {		hist_init();		initted = 1;	}	cread_line(buf, &len);}