Added an FGIOChannel::writestring().

Some cygwin32 portability fixes for fg_socket.cxx.

src/Network/fg_file.cxx

@@ -108,6 +108,13 @@ int FGFile::write( char *buf, int length ) {
 }
 
 
+// write null terminated string to a file
+int FGFile::writestring( char *str ) {
+    int length = strlen( str );
+    return write( str, length );
+}
+
+
 // close the port
 bool FGFile::close() {
     if ( std::close( fp ) == -1 ) {

src/Network/fg_file.hxx

@@ -66,6 +66,9 @@ public:
     // write data to a file
     int write( char *buf, int length );
 
+    // write null terminated string to a file
+    int writestring( char *str );
+
     // close file
     bool close();
 

src/Network/fg_serial.cxx

@@ -136,6 +136,13 @@ int FGSerial::write( char *buf, int length ) {
 }
 
 
+// write null terminated string to port
+int FGSerial::writestring( char *str ) {
+    int length = strlen( str );
+    return write( str, length );
+}
+
+
 // close the port
 bool FGSerial::close() {
     if ( ! port.close_port() ) {

src/Network/fg_serial.hxx

@@ -70,9 +70,12 @@ public:
     // read a line of data, length is max size of input buffer
     int readline( char *buf, int length );
 
-    // write data to a file
+    // write data to port
     int write( char *buf, int length );
 
+    // write null terminated string to port
+    int writestring( char *str );
+
     // close port
     bool close();
 

src/Network/fg_socket.cxx

@@ -27,8 +27,6 @@
 #include <sys/types.h>		// socket(), bind(), select(), accept()
 #include <sys/socket.h>		// socket(), bind(), listen(), accept()
 #include <netinet/in.h>		// struct sockaddr_in
-#include <netinet/tcp.h>	// #define TCP_NODELAY, this attempts to 
-                                // disable the Nagle algorithm.
 #include <netdb.h>		// gethostbyname()
 #include <unistd.h>		// select(), fsync()/fdatasync()
 
@@ -53,7 +51,12 @@ FGSocket::~FGSocket() {
 
 int FGSocket::make_server_socket () {
     struct sockaddr_in name;
+
+#if defined( __CYGWIN__ ) || defined( __CYGWIN32__ )
+    int length;
+#else
     socklen_t length;
+#endif
      
     // Create the socket.
     sock = socket (PF_INET, SOCK_STREAM, 0);
@@ -107,7 +110,11 @@ int FGSocket::make_client_socket () {
 
     // Connect this socket to the host and the port specified on the
     // command line
+#if defined( __CYGWIN__ ) || defined( __CYGWIN32__ )
+    bcopy(hp->h_addr, (char *)(&(name.sin_addr.s_addr)), hp->h_length);
+#else
     bcopy(hp->h_addr, &(name.sin_addr.s_addr), hp->h_length);
+#endif
     name.sin_port = htons(port);
 
     if ( connect(sock, (struct sockaddr *) &name, 
@@ -312,6 +319,13 @@ int FGSocket::write( char *buf, int length ) {
 }
 
 
+// write null terminated string to socket (server)
+int FGSocket::writestring( char *str ) {
+    int length = strlen( str );
+    return write( str, length );
+}
+
+
 // close the port
 bool FGSocket::close() {
     for ( int i = 0; i < (int)client_connections.size(); ++i ) {

src/Network/fg_socket.hxx

@@ -71,15 +71,18 @@ public:
     // open the file based on specified direction
     bool open( FGProtocol::fgProtocolDir dir );
 
-    // read data from file
+    // read data from socket
     int read( char *buf, int length );
 
-    // read data from file
+    // read data from socket
     int readline( char *buf, int length );
 
-    // write data to a file
+    // write data to a socket
     int write( char *buf, int length );
 
+    // write null terminated string to a socket
+    int writestring( char *str );
+
     // close file
     bool close();
 

src/Network/iochannel.cxx

@@ -62,6 +62,12 @@ int FGIOChannel::write( char *buf, int length ) {
 }
 
 
+// dummy process routine
+int FGIOChannel::writestring( char *str ) {
+    return false;
+}
+
+
 // dummy close routine
 bool FGIOChannel::close() {
     return false;

src/Network/iochannel.hxx

@@ -51,6 +51,7 @@ public:
     virtual int read( char *buf, int length );
     virtual int readline( char *buf, int length );
     virtual int write( char *buf, int length );
+    virtual int writestring( char *str );
     virtual bool close();
 };