273 lines
7 KiB
C++
273 lines
7 KiB
C++
// props.hxx -- FGFS property manager interaction class
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//
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// Written by Curtis Olson, started September 2000.
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//
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// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (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, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// 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
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#include <simgear/compiler.h>
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#include <simgear/debug/logstream.hxx>
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#include <simgear/io/iochannel.hxx>
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#include <simgear/math/sg_types.hxx>
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#include <simgear/misc/props.hxx>
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#include <stdlib.h> // atoi() atof()
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#include <strstream>
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#include "props.hxx"
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FG_USING_STD(cout);
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FG_USING_STD(istrstream);
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FGProps::FGProps() {
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}
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FGProps::~FGProps() {
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}
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// open hailing frequencies
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bool FGProps::open() {
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path = "/";
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if ( is_enabled() ) {
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FG_LOG( FG_IO, FG_ALERT, "This shouldn't happen, but the channel "
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<< "is already in use, ignoring" );
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return false;
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}
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SGIOChannel *io = get_io_channel();
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if ( ! io->open( get_direction() ) ) {
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FG_LOG( FG_IO, FG_ALERT, "Error opening channel communication layer." );
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return false;
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}
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set_enabled( true );
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return true;
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}
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// return a human readable form of the value "type"
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static string getValueTypeString( const SGValue *v ) {
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string result;
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if ( v == NULL ) {
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return "unknown";
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}
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SGValue::Type type = v->getType();
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if ( type == SGValue::UNKNOWN ) {
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result = "unknown";
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} else if ( type == SGValue::BOOL ) {
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result = "bool";
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} else if ( type == SGValue::INT ) {
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result = "int";
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} else if ( type == SGValue::FLOAT ) {
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result = "float";
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} else if ( type == SGValue::DOUBLE ) {
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result = "double";
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} else if ( type == SGValue::STRING ) {
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result = "string";
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}
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return result;
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}
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bool FGProps::process_command( const char *cmd ) {
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SGIOChannel *io = get_io_channel();
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cout << "processing command = " << cmd;
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string_list tokens;
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tokens.clear();
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istrstream in(cmd);
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while ( !in.eof() ) {
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string token;
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in >> token;
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tokens.push_back( token );
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}
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string command = tokens[0];
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SGPropertyNode node( path, ¤t_properties );
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if ( node.getPath() == "" ) {
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node.setPath( "/" );
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}
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if ( command == "ls" ) {
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for (int i = 0; i < (int)node.size(); i++) {
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SGPropertyNode child = node.getChild(i);
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string name = child.getName();
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string line = name;
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if ( child.size() > 0 ) {
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line += "/\n";
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} else {
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string value = node.getStringValue ( name, "" );
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line += " =\t'" + value + "'\t(";
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line += getValueTypeString( node.getValue( name ) );
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line += ")\n";
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}
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io->writestring( line.c_str() );
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}
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} else if ( command == "cd" ) {
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// string tmp = "current path = " + node.getPath() + "\n";
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// io->writestring( tmp.c_str() );
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if ( tokens.size() <= 1 ) {
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// do nothing
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} else if ( tokens[1] == "." ) {
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// do nothing
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} else if ( tokens[1] == ".." ) {
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// go back one level
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string current = node.getPath();
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int pos = current.rfind("/");
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// cout << "path = " << current << endl;
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// cout << "new path = " << current.substr(0, pos) << endl;d
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string tmp = current.substr(0, pos);
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node.setPath( tmp );
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path = tmp;
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} else {
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// decend to specified child
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string tmp = node.getPath();
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tmp += "/" + tokens[1];
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node.setPath( tmp );
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path = tmp;
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}
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} else if ( command == "show" ) {
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if ( tokens.size() <= 1 ) {
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// do nothing
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} else {
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string ttt = "debug = '" + tokens[1] + "'\n";
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io->writestring( ttt.c_str() );
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string value = node.getStringValue ( tokens[1], "" );
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string tmp = tokens[1] + " = '" + value + "' (";
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tmp += getValueTypeString( node.getValue( tokens[1] ) );
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tmp += ")\n";
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io->writestring( tmp.c_str() );
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}
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} else if ( command == "set" ) {
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if ( tokens.size() <= 2 ) {
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// do nothing
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} else {
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SGValue *v = node.getValue( tokens[1] );
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if ( v != NULL ) {
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SGValue::Type type = v->getType();
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if ( type == SGValue::UNKNOWN ) {
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v->setUnknownValue( tokens[2] );
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} else if ( type == SGValue::BOOL ) {
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if ( tokens[2] == "true" ) {
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v->setBoolValue( true );
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} else if ( tokens[2] == "false" ) {
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v->setBoolValue( false );
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} else {
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v->setBoolValue( atoi( tokens[2].c_str() ) );
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}
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} else if ( type == SGValue::INT ) {
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v->setIntValue( atoi( tokens[2].c_str() ) );
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} else if ( type == SGValue::FLOAT ) {
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v->setFloatValue( atof( tokens[2].c_str() ) );
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} else if ( type == SGValue::DOUBLE ) {
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v->setDoubleValue( atof( tokens[2].c_str() ) );
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} else if ( type == SGValue::STRING ) {
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v->setStringValue( tokens[2] );
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}
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// now fetch and write out the new value as confirmation
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// of the change
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string value = node.getStringValue ( tokens[1], "" );
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string tmp = tokens[1] + " = '" + value + "' (";
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tmp += getValueTypeString( node.getValue( tokens[1] ) );
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tmp += ")\n";
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io->writestring( tmp.c_str() );
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} else {
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string tmp = tokens[1] + " is unknown.\n";
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io->writestring( tmp.c_str() );
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}
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}
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} else if ( command == "quit" ) {
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close();
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} else {
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io->writestring( "\n" );
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io->writestring( "Valid commands are:\n" );
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io->writestring( "\n" );
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io->writestring( "help show help message\n" );
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io->writestring( "ls list current directory\n" );
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io->writestring( "cd <dir> cd to a directory, '..' to move back\n" );
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io->writestring( "show <var> show the value of a parameter\n" );
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io->writestring( "set <var> <val> set <var> to a new <val>\n" );
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io->writestring( "quit terminate connection\n" );
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io->writestring( "\n" );
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}
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string prompt = node.getPath();
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if ( prompt == "" ) {
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prompt = "/";
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}
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prompt += "> ";
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io->writestring( prompt.c_str() );
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return true;
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}
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// process work for this port
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bool FGProps::process() {
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SGIOChannel *io = get_io_channel();
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// cout << "processing incoming props command" << endl;
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if ( get_direction() == SG_IO_BI ) {
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// cout << " (bi directional)" << endl;
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while ( io->readline( buf, max_cmd_len ) > 0 ) {
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FG_LOG( FG_IO, FG_ALERT, "Success reading data." );
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process_command( buf );
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}
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} else {
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FG_LOG( FG_IO, FG_ALERT,
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"in or out direction not supported for FGProps." );
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}
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return true;
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}
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// close the channel
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bool FGProps::close() {
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SGIOChannel *io = get_io_channel();
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set_enabled( false );
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if ( ! io->close() ) {
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return false;
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}
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cout << "successfully closed channel\n";
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return true;
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}
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