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/* $NetBSD: shell_input.c,v 1.2 1996/03/06 23:44:07 mark Exp $ */
/*
* Copyright (c) 1994 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Brini.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RiscBSD kernel project
*
* shell_input.c
*
* string input functions
*
* Created : 09/10/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
/*#define SOFT_CURSOR*/
/* Declare global variables */
/* Prototype declarations */
char *strchr __P((const char *, int));
void deleteline __P((int, int));
/*
* Reads a line from the keyboard into an input buffer allowing
* cursor editing and input history.
*/
int
readstring(string, length, valid_string, insert)
char *string;
int length;
char *valid_string;
char *insert;
{
int key;
int loop;
int entered;
int insert_mode = 1;
/*
* If we have text to preinsert into the buffer enter it and echo it
* to the display.
*/
if (insert && insert[0] != 0) {
strcpy(string, insert);
loop = strlen(insert);
printf("%s", insert);
} else
loop = 0;
entered = loop;
/*
* The main loop.
* Keep looping until return or CTRL-D is pressed.
*/
do {
#ifdef SOFT_CURSOR
/*
* Display the cursor depending on what mode we are in
*/
if (!insert_mode)
printf("\xe2");
else
printf("\xe1");
#endif
/*
* Read the keyboard
*/
key = cngetc();
#ifdef SOFT_CURSOR
/*
* Remove the cursor, restoring the text under it if necessary.
*/
if (loop == entered || entered == 0)
printf("\x7f");
else
printf("\x08%c\x08", string[loop]);
#endif
/*
* Decode the key
*/
switch (key) {
/*
* DELETE
*/
case 0x109 :
case 0x7f :
{
int loop1;
if (loop == entered) break;
for (loop1 = loop; loop1 < (entered - 1); ++loop1) {
string[loop1] = string[loop1+1];
}
--entered;
string[entered] = 0;
/* printf("\x1b[s%s \x1b[u", &string[loop]);*/
printf("\r%s \r", string);
for (loop1 = 0; loop1 <= loop; ++loop1)
printf("\x09");
}
break;
/*
* BACKSPACE
*/
case 0x08 :
{
int loop1;
if (loop == 0) {
printf("\x07");
break;
}
for (loop1 = loop-1; loop1 < (entered - 1); ++loop1) {
string[loop1] = string[loop1+1];
}
--loop;
--entered;
string[entered] = 0;
/* printf("\x1b[D\x1b[s%s \x1b[u", &string[loop]);*/
printf("\r%s \r", string);
for (loop1 = 0; loop1 < loop; ++loop1)
printf("\x09");
}
break;
/*
* CTRL-U
*/
case 0x15 :
deleteline(loop, entered);
loop = 0;
entered = 0;
break;
/*
* CTRL-A
*/
case 0x01 :
insert_mode = !insert_mode;
break;
/*
* CTRL-D
*/
case 0x04 :
return(-1);
break;
/*
* CURSOR LEFT
*/
case 0x102 :
--loop;
if (loop < 0)
loop = 0;
else
printf("\x1b[D");
break;
/*
* CURSOR RIGHT
*/
case 0x103 :
++loop;
if (loop > entered)
loop = entered;
else
printf("\x1b[C");
break;
/*
* RETURN
*/
case 0x0d :
case 0x0a :
break;
/*
* Another key
*/
default :
/*
* Check for a valid key to enter
*/
if (key < 0x100 && key > 0x1f
&& (valid_string == NULL || strchr(valid_string, key))) {
if (!insert_mode && loop < length) {
string[loop] = key;
printf("%c", key);
++loop;
if (loop > entered) entered = loop;
}
else if (entered < length) {
int loop1;
for (loop1 = entered; loop1 >= loop; --loop1) {
string[loop1+1] = string[loop1];
}
string[loop] = key;
++loop;
++entered;
string[entered] = 0;
if (loop != entered) printf("\x1b[s");
printf("%s", &string[loop-1]);
if (loop != entered) printf("\x1b[u\x1b[C");
} else {
printf("\x07");
}
}
break;
}
} while (key != 0x0d && key != 0x0a);
printf("\n\r");
string[entered] = 0;
return(entered);
}
/* This erases a line of text */
void
deleteline(loop, entered)
int loop;
int entered;
{
while (loop < entered) {
++loop;
printf("\x1b[C");
}
while (loop > 0) {
--loop;
--entered;
printf("\x7f");
}
}
/* End of shell_input.c */
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