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/*
* io.c -- Valerie client demo input/output
* Copyright (C) 2002-2003 Ushodaya Enterprises Limited
* Author: Charles Yates <charles.yates@pandora.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* System header files */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <termios.h>
#include <unistd.h>
#include <sys/time.h>
/* Application header files */
#include "io.h"
char *chomp( char *input )
{
if ( input != NULL )
{
int length = strlen( input );
if ( length && input[ length - 1 ] == '\n' )
input[ length - 1 ] = '\0';
if ( length > 1 && input[ length - 2 ] == '\r' )
input[ length - 2 ] = '\0';
}
return input;
}
char *trim( char *input )
{
if ( input != NULL )
{
int length = strlen( input );
int first = 0;
while( first < length && isspace( input[ first ] ) )
first ++;
memmove( input, input + first, length - first + 1 );
length = length - first;
while ( length > 0 && isspace( input[ length - 1 ] ) )
input[ -- length ] = '\0';
}
return input;
}
char *strip_quotes( char *input )
{
if ( input != NULL )
{
char *ptr = strrchr( input, '\"' );
if ( ptr != NULL )
*ptr = '\0';
if ( input[ 0 ] == '\"' )
strcpy( input, input + 1 );
}
return input;
}
char *io_get_string( char *output, int maxlength, const char *use )
{
char *value = NULL;
strcpy( output, use );
if ( trim( chomp( fgets( output, maxlength, stdin ) ) ) != NULL )
{
if ( !strcmp( output, "" ) )
strcpy( output, use );
value = output;
}
return value;
}
int *get_int( int *output, int use )
{
int *value = NULL;
char temp[ 132 ];
*output = use;
if ( trim( chomp( fgets( temp, 132, stdin ) ) ) != NULL )
{
if ( strcmp( temp, "" ) )
*output = atoi( temp );
value = output;
}
return value;
}
/** This stores the previous settings
*/
static struct termios oldtty;
static int mode = 0;
/** This is called automatically on application exit to restore the
previous tty settings.
*/
void term_exit(void)
{
if ( mode == 1 )
{
tcsetattr( 0, TCSANOW, &oldtty );
mode = 0;
}
}
/** Init terminal so that we can grab keys without blocking.
*/
void term_init( )
{
struct termios tty;
tcgetattr( 0, &tty );
oldtty = tty;
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
tty.c_cflag &= ~(CSIZE|PARENB);
tty.c_cflag |= CS8;
tty.c_cc[ VMIN ] = 1;
tty.c_cc[ VTIME ] = 0;
tcsetattr( 0, TCSANOW, &tty );
mode = 1;
atexit( term_exit );
}
/** Check for a keypress without blocking infinitely.
Returns: ASCII value of keypress or -1 if no keypress detected.
*/
int term_read( )
{
int n = 1;
unsigned char ch;
struct timeval tv;
fd_set rfds;
FD_ZERO( &rfds );
FD_SET( 0, &rfds );
tv.tv_sec = 1;
tv.tv_usec = 0;
n = select( 1, &rfds, NULL, NULL, &tv );
if (n > 0)
{
n = read( 0, &ch, 1 );
tcflush( 0, TCIFLUSH );
if (n == 1)
return ch;
return n;
}
return -1;
}
char get_keypress( )
{
char value = '\0';
int pressed = 0;
fflush( stdout );
term_init( );
while ( ( pressed = term_read( ) ) == -1 ) ;
term_exit( );
value = (char)pressed;
return value;
}
void wait_for_any_key( const char *message )
{
if ( message == NULL )
printf( "Press any key to continue: " );
else
printf( "%s", message );
get_keypress( );
printf( "\n\n" );
}
void beep( )
{
printf( "%c", 7 );
fflush( stdout );
}
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