Implement DA (device attributes), including writeback to host

termemu.cpp

@@ -172,12 +172,29 @@ int termemu( int fd, Terminal::Emulator *terminal )
     return -1;
   }
 
+  std::string terminal_to_host;
+
   /* feed to terminal */
   for ( int i = 0; i < bytes_read; i++ ) {
-    terminal->input( buf[ i ] );
+    terminal_to_host.append( terminal->input( buf[ i ] ) );
   }
 
   terminal->debug_printout( stdout );
 
+  /* write writeback */
+  ssize_t total_bytes_written = 0;
+  ssize_t bytes_to_write = terminal_to_host.length();
+  const char *str = terminal_to_host.c_str();
+  while ( total_bytes_written < bytes_to_write ) {
+    ssize_t bytes_written = write( fd, str + total_bytes_written,
+				   bytes_to_write - total_bytes_written );
+    if ( bytes_written <= 0 ) {
+      perror( "write" );
+      return -1;
+    } else {
+      total_bytes_written += bytes_written;
+    }
+  }
+
   return 0;
 }

terminal.cpp

@@ -38,7 +38,8 @@ Emulator::Emulator( size_t s_width, size_t s_height )
     cursor_col( 0 ), cursor_row( 0 ),
     combining_char_col( 0 ), combining_char_row( 0 ),
     rows( height, Row( width ) ),
-    params(), dispatch_chars(), errors(), parsed_params()
+    params(), dispatch_chars(), terminal_to_host(),
+    errors(), parsed_params()
 {
 
 }
@@ -48,8 +49,10 @@ Emulator::~Emulator()
 
 }
 
-void Emulator::input( char c )
+std::string Emulator::input( char c )
 {
+  terminal_to_host.clear();
+
   std::vector<Parser::Action *> vec = parser.input( c );
 
   for ( std::vector<Parser::Action *>::iterator i = vec.begin();
@@ -61,6 +64,8 @@ void Emulator::input( char c )
 
     delete act;
   }
+
+  return terminal_to_host;
 }
 
 void Emulator::scroll( int N )
@@ -229,6 +234,8 @@ void Emulator::CSI_dispatch( Parser::CSI_Dispatch *act )
 	      || (dispatch_chars == "D")
 	      || (dispatch_chars == "H") ) {
     CSI_cursormove();
+  } else if ( dispatch_chars == "c" ) {
+    CSI_DA();
   }
 }
 

terminal.hpp

@@ -48,6 +48,7 @@ namespace Terminal {
     std::string params;
     std::string dispatch_chars;
 
+    std::string terminal_to_host;
     std::string errors;
 
     /* action methods */
@@ -70,12 +71,13 @@ namespace Terminal {
     void CSI_EL( void );
     void CSI_ED( void );
     void CSI_cursormove( void );
+    void CSI_DA( void );
 
   public:
     Emulator( size_t s_width, size_t s_height );
     ~Emulator();
 
-    void input( char c );
+    std::string input( char c );
 
     void resize( size_t s_width, size_t s_height );
 

terminalcsi.cpp

@@ -83,3 +83,8 @@ void Emulator::CSI_cursormove( void )
 
   newgrapheme();
 }
+
+void Emulator::CSI_DA( void )
+{
+  terminal_to_host.append( "\033[?1;0c" );
+}