-// generic.cxx -- generic protocal class
+// generic.cxx -- generic protocol class
//
// Written by Curtis Olson, started November 1999.
//
-// Copyright (C) 1999 Curtis L. Olson - curt@flightgear.org
+// Copyright (C) 1999 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <string.h> // strstr()
+#include <stdlib.h> // strtod(), atoi()
#include <simgear/debug/logstream.hxx>
#include <simgear/io/iochannel.hxx>
#include <simgear/structure/exception.hxx>
#include <simgear/misc/sg_path.hxx>
+#include <simgear/misc/stdint.hxx>
#include <simgear/props/props.hxx>
#include <simgear/props/props_io.hxx>
+#include <simgear/math/SGMath.hxx>
#include <Main/globals.hxx>
#include <Main/fg_props.hxx>
-
+#include <Main/fg_os.hxx>
+#include <Main/util.hxx>
#include "generic.hxx"
+FGGeneric::FGGeneric(vector<string> tokens) : exitOnError(false), initOk(false)
+{
+ size_t configToken;
+ if (tokens[1] == "socket") {
+ configToken = 7;
+ } else if (tokens[1] == "file") {
+ configToken = 5;
+ } else {
+ configToken = 6;
+ }
-FGGeneric::FGGeneric(string& config) {
+ if ((configToken >= tokens.size())||(tokens[ configToken ] == "")) {
+ SG_LOG(SG_NETWORK, SG_ALERT,
+ "Not enough tokens passed for generic '" << tokens[1] << "' protocol. ");
+ return;
+ }
- string file = config+".xml";
+ string config = tokens[ configToken ];
+ file_name = config+".xml";
+ direction = tokens[2];
- SGPath path( globals->get_fg_root() );
- path.append("Protocol");
- path.append(file.c_str());
- SG_LOG(SG_GENERAL, SG_INFO, "Reading communication protocol from "
- << path.str());
-
- SGPropertyNode root;
- try {
- readProperties(path.str(), &root);
- } catch (const sg_exception &e) {
- SG_LOG(SG_GENERAL, SG_ALERT,
- "Unable to load the protocol configuration file");
- return;
+ if (direction != "in" && direction != "out" && direction != "bi") {
+ SG_LOG(SG_NETWORK, SG_ALERT, "Unsuported protocol direction: "
+ << direction);
+ return;
}
- SGPropertyNode *output = root.getNode("generic/output");
+ reinit();
+}
- /* These variables specified in the fgfsbase/Properties/xxxx.xml file for each format
- * var_sep_string = the string/charachter to place between variables
- * line_sep_string = the string/charachter to place at the end of each lot of variables
- */
- var_sep_string = output->getStringValue("var_separator");
- line_sep_string = output->getStringValue("line_separator");
-
- if ( var_sep_string == "newline" )
- var_separator = '\n';
- else if ( var_sep_string == "tab" )
- var_separator = '\t';
- else if ( var_sep_string == "space" )
- var_separator = ' ';
- else if ( var_sep_string == "formfeed" )
- var_separator = '\f';
- else if ( var_sep_string == "carriagereturn" )
- var_sep_string = '\r';
- else if ( var_sep_string == "verticaltab" )
- var_separator = '\v';
- else
- var_separator = var_sep_string;
-
- if ( line_sep_string == "newline" )
- line_separator = '\n';
- if ( line_sep_string == "tab" )
- line_separator = '\t';
- if ( line_sep_string == "space" )
- line_separator = ' ';
- else if ( line_sep_string == "formfeed" )
- line_separator = '\f';
- else if ( line_sep_string == "carriagereturn" )
- line_separator = '\r';
- else if ( line_sep_string == "verticaltab" )
- line_separator = '\v';
- else
- line_separator = line_sep_string;
-
-
- vector<SGPropertyNode_ptr> chunks = output->getChildren("chunk");
- for (unsigned int i = 0; i < chunks.size(); i++) {
+FGGeneric::~FGGeneric() {
+}
- _serial_prot chunk;
+union u32 {
+ uint32_t intVal;
+ float floatVal;
+};
- // chunk.name = chunks[i]->getStringValue("name");
- chunk.format = chunks[i]->getStringValue("format", "%d");
- chunk.offset = chunks[i]->getDoubleValue("offset");
- chunk.factor = chunks[i]->getDoubleValue("offset", 1.0);
+union u64 {
+ uint64_t longVal;
+ double doubleVal;
+};
- string node = chunks[i]->getStringValue("node");
- chunk.prop = fgGetNode(node.c_str(), true);
+// generate the message
+bool FGGeneric::gen_message_binary() {
+ string generic_sentence;
+ length = 0;
- string type = chunks[i]->getStringValue("type");
- if (type == "bool")
- chunk.type = FG_BOOL;
- else if (type == "float")
- chunk.type = FG_DOUBLE;
- else if (type == "string")
- chunk.type = FG_STRING;
- else
- chunk.type = FG_INT;
+ double val;
+ for (unsigned int i = 0; i < _out_message.size(); i++) {
+
+ switch (_out_message[i].type) {
+ case FG_INT:
+ {
+ val = _out_message[i].offset +
+ _out_message[i].prop->getIntValue() * _out_message[i].factor;
+ int32_t intVal = val;
+ if (binary_byte_order != BYTE_ORDER_MATCHES_NETWORK_ORDER) {
+ intVal = (int32_t) sg_bswap_32((uint32_t)intVal);
+ }
+ memcpy(&buf[length], &intVal, sizeof(int32_t));
+ length += sizeof(int32_t);
+ break;
+ }
+
+ case FG_BOOL:
+ buf[length] = (char) (_out_message[i].prop->getBoolValue() ? true : false);
+ length += 1;
+ break;
+
+ case FG_FIXED:
+ {
+ val = _out_message[i].offset +
+ _out_message[i].prop->getFloatValue() * _out_message[i].factor;
+
+ int32_t fixed = (int)(val * 65536.0f);
+ if (binary_byte_order != BYTE_ORDER_MATCHES_NETWORK_ORDER) {
+ fixed = (int32_t) sg_bswap_32((uint32_t)fixed);
+ }
+ memcpy(&buf[length], &fixed, sizeof(int32_t));
+ length += sizeof(int32_t);
+ break;
+ }
- _message.push_back(chunk);
-
+ case FG_FLOAT:
+ {
+ val = _out_message[i].offset +
+ _out_message[i].prop->getFloatValue() * _out_message[i].factor;
+ u32 tmpun32;
+ tmpun32.floatVal = static_cast<float>(val);
+
+ if (binary_byte_order != BYTE_ORDER_MATCHES_NETWORK_ORDER) {
+ tmpun32.intVal = sg_bswap_32(tmpun32.intVal);
+ }
+ memcpy(&buf[length], &tmpun32.intVal, sizeof(uint32_t));
+ length += sizeof(uint32_t);
+ break;
+ }
+
+ case FG_DOUBLE:
+ {
+ val = _out_message[i].offset +
+ _out_message[i].prop->getFloatValue() * _out_message[i].factor;
+ u64 tmpun64;
+ tmpun64.doubleVal = val;
+
+ if (binary_byte_order != BYTE_ORDER_MATCHES_NETWORK_ORDER) {
+ tmpun64.longVal = sg_bswap_64(tmpun64.longVal);
+ }
+ memcpy(&buf[length], &tmpun64.longVal, sizeof(uint64_t));
+ length += sizeof(uint64_t);
+ break;
+ }
+
+ default: // SG_STRING
+ const char *strdata = _out_message[i].prop->getStringValue();
+ int32_t strlength = strlen(strdata);
+
+ if (binary_byte_order == BYTE_ORDER_NEEDS_CONVERSION) {
+ SG_LOG( SG_IO, SG_ALERT, "Generic protocol: "
+ "FG_STRING will be written in host byte order.");
+ }
+ /* Format for strings is
+ * [length as int, 4 bytes][ASCII data, length bytes]
+ */
+ if (binary_byte_order != BYTE_ORDER_MATCHES_NETWORK_ORDER) {
+ strlength = sg_bswap_32(strlength);
+ }
+ memcpy(&buf[length], &strlength, sizeof(int32_t));
+ length += sizeof(int32_t);
+ strncpy(&buf[length], strdata, strlength);
+ length += strlength;
+ /* FIXME padding for alignment? Something like:
+ * length += (strlength % 4 > 0 ? sizeof(int32_t) - strlength % 4 : 0;
+ */
+ break;
+ }
}
-}
+ // add the footer to the packet ("line")
+ switch (binary_footer_type) {
+ case FOOTER_LENGTH:
+ binary_footer_value = length;
+ break;
-FGGeneric::~FGGeneric() {
- _message.clear();
-}
+ case FOOTER_MAGIC:
+ case FOOTER_NONE:
+ break;
+ }
+ if (binary_footer_type != FOOTER_NONE) {
+ int32_t intValue = binary_footer_value;
+ if (binary_byte_order != BYTE_ORDER_MATCHES_NETWORK_ORDER) {
+ intValue = sg_bswap_32(binary_footer_value);
+ }
+ memcpy(&buf[length], &intValue, sizeof(int32_t));
+ length += sizeof(int32_t);
+ }
-// generate the message
-bool FGGeneric::gen_message() {
+ return true;
+}
+bool FGGeneric::gen_message_ascii() {
string generic_sentence;
char tmp[255];
+ length = 0;
- int v;
- double d;
-
- for (unsigned int i = 0; i < _message.size(); i++) {
+ double val;
+ for (unsigned int i = 0; i < _out_message.size(); i++) {
- if (i > 0)
- generic_sentence += var_separator;
+ if (i > 0) {
+ generic_sentence += var_separator;
+ }
- switch (_message[i].type) {
+ switch (_out_message[i].type) {
case FG_INT:
- v = _message[i].offset +
- _message[i].prop->getIntValue() * _message[i].factor;
- snprintf(tmp, 255, _message[i].format.c_str(), v);
+ val = _out_message[i].offset +
+ _out_message[i].prop->getIntValue() * _out_message[i].factor;
+ snprintf(tmp, 255, _out_message[i].format.c_str(), (int)val);
break;
case FG_BOOL:
- snprintf(tmp, 255, _message[i].format.c_str(),
- _message[i].prop->getBoolValue());
+ snprintf(tmp, 255, _out_message[i].format.c_str(),
+ _out_message[i].prop->getBoolValue());
+ break;
+
+ case FG_FIXED:
+ val = _out_message[i].offset +
+ _out_message[i].prop->getFloatValue() * _out_message[i].factor;
+ snprintf(tmp, 255, _out_message[i].format.c_str(), (float)val);
+ break;
+
+ case FG_FLOAT:
+ val = _out_message[i].offset +
+ _out_message[i].prop->getFloatValue() * _out_message[i].factor;
+ snprintf(tmp, 255, _out_message[i].format.c_str(), (float)val);
break;
case FG_DOUBLE:
- d = _message[i].offset +
- _message[i].prop->getDoubleValue() * _message[i].factor;
- snprintf(tmp, 255, _message[i].format.c_str(), d);
+ val = _out_message[i].offset +
+ _out_message[i].prop->getDoubleValue() * _out_message[i].factor;
+ snprintf(tmp, 255, _out_message[i].format.c_str(), (double)val);
break;
default: // SG_STRING
- snprintf(tmp, 255, _message[i].format.c_str(),
- _message[i].prop->getStringValue());
+ snprintf(tmp, 255, _out_message[i].format.c_str(),
+ _out_message[i].prop->getStringValue());
}
generic_sentence += tmp;
}
- /* After each lot of variables has been added, put the line separator char/string */
+ /* After each lot of variables has been added, put the line separator
+ * char/string
+ */
generic_sentence += line_separator;
-
-
+
length = generic_sentence.length();
strncpy( buf, generic_sentence.c_str(), length );
return true;
}
-bool FGGeneric::parse_message() {
- return true;
+bool FGGeneric::gen_message() {
+ if (binary_mode) {
+ return gen_message_binary();
+ } else {
+ return gen_message_ascii();
+ }
+}
+
+bool FGGeneric::parse_message_binary(int length) {
+ char *p2, *p1 = buf;
+ int32_t tmp32;
+ int i = -1;
+
+ p2 = p1 + length;
+ while ((++i < (int)_in_message.size()) && (p1 < p2)) {
+
+ switch (_in_message[i].type) {
+ case FG_INT:
+ if (binary_byte_order == BYTE_ORDER_NEEDS_CONVERSION) {
+ tmp32 = sg_bswap_32(*(int32_t *)p1);
+ } else {
+ tmp32 = *(int32_t *)p1;
+ }
+ updateValue(_in_message[i], (int)tmp32);
+ p1 += sizeof(int32_t);
+ break;
+
+ case FG_BOOL:
+ updateValue(_in_message[i], p1[0] != 0);
+ p1 += 1;
+ break;
+
+ case FG_FIXED:
+ if (binary_byte_order == BYTE_ORDER_NEEDS_CONVERSION) {
+ tmp32 = sg_bswap_32(*(int32_t *)p1);
+ } else {
+ tmp32 = *(int32_t *)p1;
+ }
+ updateValue(_in_message[i], (float)tmp32 / 65536.0f);
+ p1 += sizeof(int32_t);
+ break;
+
+ case FG_FLOAT:
+ u32 tmpun32;
+ if (binary_byte_order == BYTE_ORDER_NEEDS_CONVERSION) {
+ tmpun32.intVal = sg_bswap_32(*(uint32_t *)p1);
+ } else {
+ tmpun32.floatVal = *(float *)p1;
+ }
+ updateValue(_in_message[i], tmpun32.floatVal);
+ p1 += sizeof(int32_t);
+ break;
+
+ case FG_DOUBLE:
+ u64 tmpun64;
+ if (binary_byte_order == BYTE_ORDER_NEEDS_CONVERSION) {
+ tmpun64.longVal = sg_bswap_64(*(uint64_t *)p1);
+ } else {
+ tmpun64.doubleVal = *(double *)p1;
+ }
+ updateValue(_in_message[i], tmpun64.doubleVal);
+ p1 += sizeof(int64_t);
+ break;
+
+ default: // SG_STRING
+ SG_LOG( SG_IO, SG_ALERT, "Generic protocol: "
+ "Ignoring unsupported binary input chunk type.");
+ break;
+ }
+ }
+
+ return true;
}
+bool FGGeneric::parse_message_ascii(int length) {
+ char *p1 = buf;
+ int i = -1;
+ int chunks = _in_message.size();
+ int line_separator_size = line_separator.size();
+
+ if (length < line_separator_size ||
+ line_separator.compare(buf + length - line_separator_size) != 0) {
+
+ SG_LOG(SG_IO, SG_WARN,
+ "Input line does not end with expected line separator." );
+ } else {
+ buf[length - line_separator_size] = 0;
+ }
+
+ size_t varsep_len = var_separator.length();
+ while ((++i < chunks) && p1) {
+ char* p2 = NULL;
+
+ if (varsep_len > 0)
+ {
+ p2 = strstr(p1, var_separator.c_str());
+ if (p2) {
+ *p2 = 0;
+ p2 += varsep_len;
+ }
+ }
+
+ switch (_in_message[i].type) {
+ case FG_INT:
+ updateValue(_in_message[i], atoi(p1));
+ break;
+
+ case FG_BOOL:
+ updateValue(_in_message[i], atof(p1) != 0.0);
+ break;
+
+ case FG_FIXED:
+ case FG_FLOAT:
+ updateValue(_in_message[i], (float)strtod(p1, 0));
+ break;
+
+ case FG_DOUBLE:
+ updateValue(_in_message[i], (double)strtod(p1, 0));
+ break;
+
+ default: // SG_STRING
+ _in_message[i].prop->setStringValue(p1);
+ break;
+ }
+
+ p1 = p2;
+ }
+
+ return true;
+}
+
+bool FGGeneric::parse_message_len(int length) {
+ if (binary_mode) {
+ return parse_message_binary(length);
+ } else {
+ return parse_message_ascii(length);
+ }
+}
// open hailing frequencies
set_enabled( true );
+ if ( ((get_direction() == SG_IO_OUT )||
+ (get_direction() == SG_IO_BI))
+ && ! preamble.empty() ) {
+ if ( ! io->write( preamble.c_str(), preamble.size() ) ) {
+ SG_LOG( SG_IO, SG_WARN, "Error writing preamble." );
+ return false;
+ }
+ }
+
return true;
}
bool FGGeneric::process() {
SGIOChannel *io = get_io_channel();
- if ( get_direction() == SG_IO_OUT ) {
+ if ( (get_direction() == SG_IO_OUT) ||
+ (get_direction() == SG_IO_BI) ) {
gen_message();
if ( ! io->write( buf, length ) ) {
- SG_LOG( SG_IO, SG_ALERT, "Error writing data." );
- return false;
+ SG_LOG( SG_IO, SG_WARN, "Error writing data." );
+ goto error_out;
}
- } else if ( get_direction() == SG_IO_IN ) {
- // Temporarliy disable this as output only!
- //if ( (length = io->readline( buf, FG_MAX_MSG_SIZE )) > 0 ) {
- // parse_message();
- //} else {
- // SG_LOG( SG_IO, SG_ALERT, "Error reading data." );
- // return false;
- //}
}
+ if (( get_direction() == SG_IO_IN ) ||
+ (get_direction() == SG_IO_BI) ) {
+ if ( io->get_type() == sgFileType ) {
+ if (!binary_mode) {
+ length = io->readline( buf, FG_MAX_MSG_SIZE );
+ if ( length > 0 ) {
+ parse_message_len( length );
+ } else {
+ SG_LOG( SG_IO, SG_ALERT, "Error reading data." );
+ return false;
+ }
+ } else {
+ length = io->read( buf, binary_record_length );
+ if ( length == binary_record_length ) {
+ parse_message_len( length );
+ } else {
+ SG_LOG( SG_IO, SG_ALERT,
+ "Generic protocol: Received binary "
+ "record of unexpected size, expected: "
+ << binary_record_length << " but received: "
+ << length);
+ }
+ }
+ } else {
+ if (!binary_mode) {
+ while ((length = io->readline( buf, FG_MAX_MSG_SIZE )) > 0 ) {
+ parse_message_len( length );
+ }
+ } else {
+ while ((length = io->read( buf, binary_record_length ))
+ == binary_record_length ) {
+ parse_message_len( length );
+ }
+
+ if ( length > 0 ) {
+ SG_LOG( SG_IO, SG_ALERT,
+ "Generic protocol: Received binary "
+ "record of unexpected size, expected: "
+ << binary_record_length << " but received: "
+ << length);
+ }
+ }
+ }
+ }
return true;
+error_out:
+ if (exitOnError) {
+ fgOSExit(1);
+ return true; // should not get there, but please the compiler
+ } else
+ return false;
}
bool FGGeneric::close() {
SGIOChannel *io = get_io_channel();
+ if ( ((get_direction() == SG_IO_OUT)||
+ (get_direction() == SG_IO_BI))
+ && ! postamble.empty() ) {
+ if ( ! io->write( postamble.c_str(), postamble.size() ) ) {
+ SG_LOG( SG_IO, SG_ALERT, "Error writing postamble." );
+ return false;
+ }
+ }
+
set_enabled( false );
if ( ! io->close() ) {
return true;
}
+
+
+void
+FGGeneric::reinit()
+{
+ SGPath path( globals->get_fg_root() );
+ path.append("Protocol");
+ path.append(file_name.c_str());
+
+ SG_LOG(SG_NETWORK, SG_INFO, "Reading communication protocol from "
+ << path.str());
+
+ SGPropertyNode root;
+ try {
+ readProperties(path.str(), &root);
+ } catch (const sg_exception & ex) {
+ SG_LOG(SG_NETWORK, SG_ALERT,
+ "Unable to load the protocol configuration file: " << ex.getFormattedMessage() );
+ return;
+ }
+
+ if (direction == "out") {
+ SGPropertyNode *output = root.getNode("generic/output");
+ if (output) {
+ _out_message.clear();
+ if (!read_config(output, _out_message))
+ {
+ // bad configuration
+ return;
+ }
+ }
+ } else if (direction == "in") {
+ SGPropertyNode *input = root.getNode("generic/input");
+ if (input) {
+ _in_message.clear();
+ if (!read_config(input, _in_message))
+ {
+ // bad configuration
+ return;
+ }
+ if (!binary_mode && (line_separator.size() == 0 ||
+ *line_separator.rbegin() != '\n')) {
+
+ SG_LOG(SG_IO, SG_WARN,
+ "Warning: Appending newline to line separator in generic input.");
+ line_separator.push_back('\n');
+ }
+ }
+ }
+
+ initOk = true;
+}
+
+
+bool
+FGGeneric::read_config(SGPropertyNode *root, vector<_serial_prot> &msg)
+{
+ binary_mode = root->getBoolValue("binary_mode");
+
+ if (!binary_mode) {
+ /* These variables specified in the $FG_ROOT/data/Protocol/xxx.xml
+ * file for each format
+ *
+ * var_sep_string = the string/charachter to place between variables
+ * line_sep_string = the string/charachter to place at the end of each
+ * lot of variables
+ */
+ preamble = fgUnescape(root->getStringValue("preamble"));
+ postamble = fgUnescape(root->getStringValue("postamble"));
+ var_sep_string = fgUnescape(root->getStringValue("var_separator"));
+ line_sep_string = fgUnescape(root->getStringValue("line_separator"));
+
+ if ( var_sep_string == "newline" ) {
+ var_separator = '\n';
+ } else if ( var_sep_string == "tab" ) {
+ var_separator = '\t';
+ } else if ( var_sep_string == "space" ) {
+ var_separator = ' ';
+ } else if ( var_sep_string == "formfeed" ) {
+ var_separator = '\f';
+ } else if ( var_sep_string == "carriagereturn" ) {
+ var_sep_string = '\r';
+ } else if ( var_sep_string == "verticaltab" ) {
+ var_separator = '\v';
+ } else {
+ var_separator = var_sep_string;
+ }
+
+ if ( line_sep_string == "newline" ) {
+ line_separator = '\n';
+ } else if ( line_sep_string == "tab" ) {
+ line_separator = '\t';
+ } else if ( line_sep_string == "space" ) {
+ line_separator = ' ';
+ } else if ( line_sep_string == "formfeed" ) {
+ line_separator = '\f';
+ } else if ( line_sep_string == "carriagereturn" ) {
+ line_separator = '\r';
+ } else if ( line_sep_string == "verticaltab" ) {
+ line_separator = '\v';
+ } else {
+ line_separator = line_sep_string;
+ }
+ } else {
+ // default values: no footer and record_length = sizeof(representation)
+ binary_footer_type = FOOTER_NONE;
+ binary_record_length = -1;
+
+ // default choice is network byte order (big endian)
+ if (sgIsLittleEndian()) {
+ binary_byte_order = BYTE_ORDER_NEEDS_CONVERSION;
+ } else {
+ binary_byte_order = BYTE_ORDER_MATCHES_NETWORK_ORDER;
+ }
+
+ if ( root->hasValue("binary_footer") ) {
+ string footer_type = root->getStringValue("binary_footer");
+ if ( footer_type == "length" ) {
+ binary_footer_type = FOOTER_LENGTH;
+ } else if ( footer_type.substr(0, 5) == "magic" ) {
+ binary_footer_type = FOOTER_MAGIC;
+ binary_footer_value = strtol(footer_type.substr(6,
+ footer_type.length() - 6).c_str(), (char**)0, 0);
+ } else if ( footer_type != "none" ) {
+ SG_LOG(SG_IO, SG_ALERT,
+ "generic protocol: Unknown generic binary protocol "
+ "footer '" << footer_type << "', using no footer.");
+ }
+ }
+
+ if ( root->hasValue("record_length") ) {
+ binary_record_length = root->getIntValue("record_length");
+ }
+
+ if ( root->hasValue("byte_order") ) {
+ string byte_order = root->getStringValue("byte_order");
+ if (byte_order == "network" ) {
+ if ( sgIsLittleEndian() ) {
+ binary_byte_order = BYTE_ORDER_NEEDS_CONVERSION;
+ } else {
+ binary_byte_order = BYTE_ORDER_MATCHES_NETWORK_ORDER;
+ }
+ } else if ( byte_order == "host" ) {
+ binary_byte_order = BYTE_ORDER_MATCHES_NETWORK_ORDER;
+ } else {
+ SG_LOG(SG_IO, SG_ALERT,
+ "generic protocol: Undefined generic binary protocol"
+ "byte order, using HOST byte order.");
+ }
+ }
+ }
+
+ int record_length = 0; // Only used for binary protocols.
+ vector<SGPropertyNode_ptr> chunks = root->getChildren("chunk");
+
+ for (unsigned int i = 0; i < chunks.size(); i++) {
+
+ _serial_prot chunk;
+
+ // chunk.name = chunks[i]->getStringValue("name");
+ chunk.format = fgUnescape(chunks[i]->getStringValue("format", "%d"));
+ chunk.offset = chunks[i]->getDoubleValue("offset");
+ chunk.factor = chunks[i]->getDoubleValue("factor", 1.0);
+ chunk.min = chunks[i]->getDoubleValue("min");
+ chunk.max = chunks[i]->getDoubleValue("max");
+ chunk.wrap = chunks[i]->getBoolValue("wrap");
+ chunk.rel = chunks[i]->getBoolValue("relative");
+
+ string node = chunks[i]->getStringValue("node", "/null");
+ chunk.prop = fgGetNode(node.c_str(), true);
+
+ string type = chunks[i]->getStringValue("type");
+
+ // Note: officially the type is called 'bool' but for backward
+ // compatibility 'boolean' will also be supported.
+ if (type == "bool" || type == "boolean") {
+ chunk.type = FG_BOOL;
+ record_length += 1;
+ } else if (type == "float") {
+ chunk.type = FG_FLOAT;
+ record_length += sizeof(int32_t);
+ } else if (type == "double") {
+ chunk.type = FG_DOUBLE;
+ record_length += sizeof(int64_t);
+ } else if (type == "fixed") {
+ chunk.type = FG_FIXED;
+ record_length += sizeof(int32_t);
+ } else if (type == "string")
+ chunk.type = FG_STRING;
+ else {
+ chunk.type = FG_INT;
+ record_length += sizeof(int32_t);
+ }
+ msg.push_back(chunk);
+
+ }
+
+ if( !binary_mode )
+ {
+ if ((chunks.size() > 1)&&(var_sep_string.length() == 0))
+ {
+ // ASCII protocols really need a separator when there is more than one chunk per line
+ SG_LOG(SG_IO, SG_ALERT,
+ "generic protocol: Invalid configuration. "
+ "'var_separator' must not be empty for protocols which have more than one chunk per line.");
+ return false;
+ }
+ }
+ else
+ {
+ if (binary_record_length == -1) {
+ binary_record_length = record_length;
+ } else if (binary_record_length < record_length) {
+ SG_LOG(SG_IO, SG_ALERT,
+ "generic protocol: Requested binary record length shorter than "
+ " requested record representation.");
+ binary_record_length = record_length;
+ }
+ }
+
+ return true;
+}
+
+void FGGeneric::updateValue(FGGeneric::_serial_prot& prot, bool val)
+{
+ if( prot.rel )
+ {
+ // value inverted if received true, otherwise leave unchanged
+ if( val )
+ setValue(prot.prop, !getValue<bool>(prot.prop));
+ }
+ else
+ {
+ setValue(prot.prop, val);
+ }
+}
projects / flightgear.git / blobdiff