Here are three bugfixes for the UDP based remote joystick server and
client. Is int32_t the correct type for a 32 bit
integer value in FlightGear? I see it is used in other places in the
code, but not that many, so I wasn't sure.
--
js_server.cxx is using long which becomes 64 bits on 64 bit systems, but
was passing 4 in memcpy and to advance len, so technically it was getting
by on 64 bit little endian systems. Fixed it to use int32_t.
--
process() is reading 4+4+4+4+4+4 = 6*4 = 24 bytes of data, but
typecasting it to (long int*) which is 64 bits on a 64 bit Unix
system, 6*8 = 48 bytes. Correct long to int32_t to not turn into a 64
bit data time when run on a 64 bit system.
--
The comparison is incorrect. It intended to limit the maximum axes count
to 4, so if it is more than 4 limit it.
--
David Fries <[email protected]>
http://fries.net/~david/ (PGP encryption key available)
commit 9594847fde2456363bf95cfd4826037bebe9650e
Author: David Fries <[email protected]>
Date: Sat Feb 20 20:42:32 2010 -0600
js_server.cxx fixes for 64 bit systems
js_server.cxx is using long which becomes 64 bits on 64 bit systems, but
was passing 4 in memcpy and to advance len, so technically it was getting
by on 64 bit little endian systems. Fixed it to use int32_t.
diff --git a/utils/js_server/js_server.cxx b/utils/js_server/js_server.cxx
index 90adc36..65f6e57 100644
--- a/utils/js_server/js_server.cxx
+++ b/utils/js_server/js_server.cxx
@@ -101,17 +101,17 @@ int main ( int argc, char ** argv )
js->read( &b, ax );
for ( axis = 0 ; axis < activeaxes ; axis++ )
{
- long axisvalue = (long int)(ax[axis]*2147483647.0);
+ int32_t axisvalue = (int32_t)(ax[axis]*2147483647.0);
printf("axisval=%li\n", axisvalue);
- memcpy(packet+len, &axisvalue, 4);
- len+=4;
+ memcpy(packet+len, &axisvalue, sizeof(axisvalue));
+ len+=sizeof(axisvalue);
}
// fill emtpy values into packes when less than 4 axes
for( ; axis < 4; axis++ )
{
- long axisvalue = 0;
- memcpy(packet+len, &axisvalue, 4);
- len+=4;
+ int32_t axisvalue = 0;
+ memcpy(packet+len, &axisvalue, sizeof(axisvalue));
+ len+=sizeof(axisvalue);
}
long int b_l = b;
commit d51b713d3a0292a3b6afb1d118f1c4b453b2a8e5
Author: David Fries <[email protected]>
Date: Sat Feb 20 20:17:04 2010 -0600
jsclient.cxx fix for 64 bit systems
process() is reading 4+4+4+4+4+4 = 6*4 = 24 bytes of data, but
typecasting it to (long int*) which is 64 bits on a 64 bit Unix
system, 6*8 = 48 bytes. Correct long to int32_t to not turn into a 64
bit data time when run on a 64 bit system.
diff --git a/src/Network/jsclient.cxx b/src/Network/jsclient.cxx
index ab6faa5..b1ed804 100644
--- a/src/Network/jsclient.cxx
+++ b/src/Network/jsclient.cxx
@@ -91,8 +91,8 @@ bool FGJsClient::process() {
if ( io->get_type() == sgFileType ) {
if ( io->read( (char *)(& buf), length ) == length ) {
SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
- long int *msg;
- msg = (long int *)buf;
+ int32_t *msg;
+ msg = (int32_t*)buf;
for( int i = 0; i < 4; ++i )
{
axis[i] = ((double)msg[i] / 2147483647.0);
@@ -105,8 +105,8 @@ bool FGJsClient::process() {
} else {
while ( io->read( (char *)(& buf), length ) == length ) {
SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
- long int *msg;
- msg = (long int *)buf;
+ int32_t *msg;
+ msg = (int32_t *)buf;
SG_LOG( SG_IO, SG_DEBUG, "ax0 = " << msg[0] << " ax1 = "
<< msg[1] << "ax2 = " << msg[2] << "ax3 = " << msg[3]);
for( int i = 0; i < 4; ++i )
commit afae732d25854a074c4b3acd9f0ac8e9e1fde12e
Author: David Fries <[email protected]>
Date: Sun Feb 21 08:38:06 2010 -0600
Fix comparison, max 4 not min 4.
The comparison is incorrect. It intended to limit the maximum axes count
to 4, so if it is more than 4 limit it.
diff --git a/utils/js_server/js_server.cxx b/utils/js_server/js_server.cxx
index f52acbd..90adc36 100644
--- a/utils/js_server/js_server.cxx
+++ b/utils/js_server/js_server.cxx
@@ -67,7 +67,7 @@ int main ( int argc, char ** argv )
ax = new float [ numaxes ] ;
activeaxes = numaxes;
- if( numaxes < 4 )
+ if( numaxes > 4 )
{
printf("max 4 axes joysticks supported at the moment, however %i axes were
detected\nWill only use the first 4 axes!\n", numaxes);
activeaxes = 4;
------------------------------------------------------------------------------
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