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209 lines
4.1 KiB
209 lines
4.1 KiB
15 years ago
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/*
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* io.c -- dv1394d client demo input/output
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* Copyright (C) 2002-2003 Ushodaya Enterprises Limited
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* Author: Charles Yates <charles.yates@pandora.be>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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/* System header files */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <termios.h>
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#include <unistd.h>
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/* Application header files */
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#include "io.h"
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char *chomp( char *input )
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{
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if ( input != NULL )
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{
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int length = strlen( input );
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if ( length && input[ length - 1 ] == '\n' )
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input[ length - 1 ] = '\0';
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if ( length > 1 && input[ length - 2 ] == '\r' )
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input[ length - 2 ] = '\0';
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}
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return input;
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}
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char *trim( char *input )
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{
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if ( input != NULL )
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{
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int length = strlen( input );
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int first = 0;
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while( first < length && isspace( input[ first ] ) )
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first ++;
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memmove( input, input + first, length - first + 1 );
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length = length - first;
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while ( length > 0 && isspace( input[ length - 1 ] ) )
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input[ -- length ] = '\0';
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}
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return input;
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}
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char *strip_quotes( char *input )
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{
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if ( input != NULL )
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{
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char *ptr = strrchr( input, '\"' );
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if ( ptr != NULL )
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*ptr = '\0';
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if ( input[ 0 ] == '\"' )
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strcpy( input, input + 1 );
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}
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return input;
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}
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char *get_string( char *output, int maxlength, char *use )
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{
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char *value = NULL;
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strcpy( output, use );
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if ( trim( chomp( fgets( output, maxlength, stdin ) ) ) != NULL )
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{
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if ( !strcmp( output, "" ) )
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strcpy( output, use );
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value = output;
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}
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return value;
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}
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int *get_int( int *output, int use )
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{
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int *value = NULL;
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char temp[ 132 ];
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*output = use;
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if ( trim( chomp( fgets( temp, 132, stdin ) ) ) != NULL )
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{
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if ( strcmp( temp, "" ) )
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*output = atoi( temp );
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value = output;
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}
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return value;
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}
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/** This stores the previous settings
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*/
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static struct termios oldtty;
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static int mode = 0;
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/** This is called automatically on application exit to restore the
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previous tty settings.
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*/
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void term_exit(void)
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{
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if ( mode == 1 )
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{
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tcsetattr( 0, TCSANOW, &oldtty );
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mode = 0;
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}
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}
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/** Init terminal so that we can grab keys without blocking.
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*/
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void term_init( )
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{
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struct termios tty;
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tcgetattr( 0, &tty );
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oldtty = tty;
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tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
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tty.c_oflag |= OPOST;
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tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
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tty.c_cflag &= ~(CSIZE|PARENB);
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tty.c_cflag |= CS8;
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tty.c_cc[ VMIN ] = 1;
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tty.c_cc[ VTIME ] = 0;
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tcsetattr( 0, TCSANOW, &tty );
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mode = 1;
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atexit( term_exit );
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}
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/** Check for a keypress without blocking infinitely.
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Returns: ASCII value of keypress or -1 if no keypress detected.
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*/
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int term_read( )
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{
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int n = 1;
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unsigned char ch;
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struct timeval tv;
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fd_set rfds;
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FD_ZERO( &rfds );
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FD_SET( 0, &rfds );
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tv.tv_sec = 0;
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tv.tv_usec = 250;
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n = select( 1, &rfds, NULL, NULL, &tv );
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if (n > 0)
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{
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n = read( 0, &ch, 1 );
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tcflush( 0, TCIFLUSH );
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if (n == 1)
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return ch;
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return n;
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}
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return -1;
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}
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char get_keypress( )
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{
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char value = '\0';
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int pressed = 0;
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fflush( stdout );
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term_init( );
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while ( ( pressed = term_read( ) ) == -1 ) ;
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term_exit( );
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value = (char)pressed;
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return value;
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}
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void wait_for_any_key( char *message )
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{
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if ( message == NULL )
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printf( "Press any key to continue: " );
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else
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printf( "%s", message );
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get_keypress( );
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printf( "\n\n" );
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}
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void beep( )
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{
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printf( "%c", 7 );
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fflush( stdout );
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}
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