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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2015 Gary Mills
* Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/*
* cscope - interactive C symbol cross-reference
*
* terminal input functions
*/
#include "global.h"
#include <curses.h> /* KEY_BACKSPACE, KEY_BREAK, and KEY_ENTER */
#include <setjmp.h> /* jmp_buf */
static jmp_buf env; /* setjmp/longjmp buffer */
static int prevchar; /* previous, ungotten character */
/* catch the interrupt signal */
/*ARGSUSED*/
SIGTYPE
catchint(int sig)
{
(void) signal(SIGINT, catchint);
longjmp(env, 1);
}
/* unget a character */
int
ungetch(int c)
{
prevchar = c;
return (0);
}
/* get a character from the terminal */
int
mygetch(void)
{
SIGTYPE (*volatile savesig)() = SIG_DFL; /* old value of signal */
int c;
/* change an interrupt signal to a break key character */
if (setjmp(env) == 0) {
savesig = signal(SIGINT, catchint);
(void) refresh(); /* update the display */
reinitmouse(); /* curses can change the menu number */
if (prevchar) {
c = prevchar;
prevchar = 0;
} else {
c = getch(); /* get a character from the terminal */
}
} else { /* longjmp to here from signal handler */
c = KEY_BREAK;
}
(void) signal(SIGINT, savesig);
return (c);
}
/* get a line from the terminal in non-canonical mode */
int
getaline(char s[], size_t size, int firstchar, BOOL iscaseless)
{
int c, i = 0;
int j;
/* if a character already has been typed */
if (firstchar != '\0') {
if (iscaseless == YES) {
firstchar = tolower(firstchar);
}
(void) addch((unsigned)firstchar); /* display it */
s[i++] = firstchar; /* save it */
}
/* until the end of the line is reached */
while ((c = mygetch()) != '\r' && c != '\n' && c != KEY_ENTER &&
c != '\003' && c != KEY_BREAK) {
if (c == erasechar() || c == '\b' || /* erase */
c == KEY_BACKSPACE) {
if (i > 0) {
(void) addstr("\b \b");
--i;
}
} else if (c == killchar()) { /* kill */
for (j = 0; j < i; ++j) {
(void) addch('\b');
}
for (j = 0; j < i; ++j) {
(void) addch(' ');
}
for (j = 0; j < i; ++j) {
(void) addch('\b');
}
i = 0;
} else if (isprint(c) || c == '\t') { /* printable */
if (iscaseless == YES) {
c = tolower(c);
}
/* if it will fit on the line */
if (i < size) {
(void) addch((unsigned)c); /* display it */
s[i++] = c; /* save it */
}
} else if (c == ctrl('X')) {
/* mouse */
(void) getmouseevent(); /* ignore it */
} else if (c == EOF) { /* end-of-file */
break;
}
/* return on an empty line to allow a command to be entered */
if (firstchar != '\0' && i == 0) {
break;
}
}
s[i] = '\0';
return (i);
}
/* ask user to enter a character after reading the message */
void
askforchar(void)
{
(void) addstr("Type any character to continue: ");
(void) mygetch();
}
/* ask user to press the RETURN key after reading the message */
void
askforreturn(void)
{
if (linemode == NO) {
(void) fprintf(stderr, "Press the RETURN key to continue: ");
(void) getchar();
}
}
/* expand the ~ and $ shell meta characters in a path */
void
shellpath(char *out, int limit, char *in)
{
char *lastchar;
char *s, *v;
/* skip leading white space */
while (isspace(*in)) {
++in;
}
lastchar = out + limit - 1;
/*
* a tilde (~) by itself represents $HOME; followed by a name it
* represents the $LOGDIR of that login name
*/
if (*in == '~') {
*out++ = *in++; /* copy the ~ because it may not be expanded */
/* get the login name */
s = out;
while (s < lastchar && *in != '/' && *in != '\0' &&
!isspace(*in)) {
*s++ = *in++;
}
*s = '\0';
/* if the login name is null, then use $HOME */
if (*out == '\0') {
v = getenv("HOME");
} else { /* get the home directory of the login name */
v = logdir(out);
}
/* copy the directory name */
if (v != NULL) {
(void) strcpy(out - 1, v);
out += strlen(v) - 1;
} else {
/* login not found so ~ must be part of the file name */
out += strlen(out);
}
}
/* get the rest of the path */
while (out < lastchar && *in != '\0' && !isspace(*in)) {
/* look for an environment variable */
if (*in == '$') {
/* copy the $ because it may not be expanded */
*out++ = *in++;
/* get the variable name */
s = out;
while (s < lastchar && *in != '/' && *in != '\0' &&
!isspace(*in)) {
*s++ = *in++;
}
*s = '\0';
/* get its value */
if ((v = getenv(out)) != NULL) {
(void) strcpy(out - 1, v);
out += strlen(v) - 1;
} else {
/*
* var not found, so $ must be part of
* the file name
*/
out += strlen(out);
}
} else { /* ordinary character */
*out++ = *in++;
}
}
*out = '\0';
}
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