Exemple #1
0
/* for each line in a range, change text matching a pattern according to
   a substitution template; return false if error */
char search_and_replace( const int first_addr, const int second_addr,
                         const int gflags, const int snum, const char isglobal )
  {
  int lc;
  char match_found = 0;

  set_current_addr( first_addr - 1 );
  for( lc = 0; lc <= second_addr - first_addr; ++lc )
    {
    line_t *lp = search_line_node( inc_current_addr() );
    int len = replace_matching_text( lp, gflags, snum );
    if( len < 0 ) return 0;
    if( len )
      {
      const char *txt = rbuf;
      const char *eot = rbuf + len;
      undo_t *up = 0;
      disable_interrupts();
      if( !delete_lines( current_addr(), current_addr(), isglobal ) ) return 0;
      do {
        txt = put_sbuf_line( txt, current_addr() );
        if( !txt ) { enable_interrupts(); return 0; }
        if( up ) up->tail = search_line_node( current_addr() );
        else if( !( up = push_undo_atom( UADD, -1, -1 ) ) )
          { enable_interrupts(); return 0; }
        }
      while( txt != eot );
      enable_interrupts();
      match_found = 1;
      }
    }
  if( !match_found && !( gflags & GLB ) )
    { set_error_msg( "No match" ); return 0; }
  return 1;
  }
Exemple #2
0
/* execute the next command in command buffer; return error status */
static int exec_command( const char ** const ibufpp, const int prev_status,
                         const bool isglobal )
  {
  const char * fnp;
  int gflags = 0;
  int addr, c, n;
  const int addr_cnt = extract_addr_range( ibufpp );

  if( addr_cnt < 0 ) return ERR;
  *ibufpp = skip_blanks( *ibufpp );
  c = *(*ibufpp)++;
  switch( c )
    {
    case 'a': if( !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( !isglobal ) clear_undo_stack();
              if( !append_lines( ibufpp, second_addr, isglobal ) ) return ERR;
              break;
    case 'c': if( first_addr == 0 ) first_addr = 1;
              if( second_addr == 0 ) second_addr = 1;
              if( !check_current_addr( addr_cnt ) ||
                  !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( !isglobal ) clear_undo_stack();
              if( !delete_lines( first_addr, second_addr, isglobal ) ||
                  !append_lines( ibufpp, current_addr(), isglobal ) ) return ERR;
              break;
    case 'd': if( !check_current_addr( addr_cnt ) ||
                  !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( !isglobal ) clear_undo_stack();
              if( !delete_lines( first_addr, second_addr, isglobal ) ) return ERR;
              inc_current_addr();
              break;
    case 'e': if( modified() && !scripted() && prev_status != EMOD )
                return EMOD;				/* fall through */
    case 'E': if( unexpected_address( addr_cnt ) ||
                  unexpected_command_suffix( **ibufpp ) ) return ERR;
              fnp = get_filename( ibufpp );
              if( !fnp || !delete_lines( 1, last_addr(), isglobal ) ||
                  !close_sbuf() ) return ERR;
              if( !open_sbuf() ) return FATAL;
              if( fnp[0] && fnp[0] != '!' ) set_def_filename( fnp );
              if( traditional() && !fnp[0] && !def_filename[0] )
                { set_error_msg( "No current filename" ); return ERR; }
              if( read_file( fnp[0] ? fnp : def_filename, 0 ) < 0 )
                return ERR;
              reset_undo_state(); set_modified( false );
              break;
    case 'f': if( unexpected_address( addr_cnt ) ||
                  unexpected_command_suffix( **ibufpp ) ) return ERR;
              fnp = get_filename( ibufpp );
              if( !fnp ) return ERR;
              if( fnp[0] == '!' )
                { set_error_msg( "Invalid redirection" ); return ERR; }
              if( fnp[0] ) set_def_filename( fnp );
              printf( "%s\n", strip_escapes( def_filename ) );
              break;
    case 'g':
    case 'v':
    case 'G':
    case 'V': if( isglobal )
                { set_error_msg( "Cannot nest global commands" ); return ERR; }
              n = ( c == 'g' || c == 'G' );	/* mark matching lines */
              if( !check_addr_range( 1, last_addr(), addr_cnt ) ||
                  !build_active_list( ibufpp, first_addr, second_addr, n ) )
                return ERR;
              n = ( c == 'G' || c == 'V' );		/* interactive */
              if( ( n && !get_command_suffix( ibufpp, &gflags ) ) ||
                  !exec_global( ibufpp, gflags, n ) )
                return ERR;
              break;
    case 'h':
    case 'H': if( unexpected_address( addr_cnt ) ||
                  !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( c == 'H' ) verbose = !verbose;
              if( ( c == 'h' || verbose ) && errmsg[0] )
                fprintf( stderr, "%s\n", errmsg );
              break;
    case 'i': if( second_addr == 0 ) second_addr = 1;
              if( !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( !isglobal ) clear_undo_stack();
              if( !append_lines( ibufpp, second_addr - 1, isglobal ) )
                return ERR;
              break;
    case 'j': if( !check_addr_range( current_addr(), current_addr() + 1, addr_cnt ) ||
                  !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( !isglobal ) clear_undo_stack();
              if( first_addr != second_addr &&
                  !join_lines( first_addr, second_addr, isglobal ) ) return ERR;
              break;
    case 'k': n = *(*ibufpp)++;
              if( second_addr == 0 ) { invalid_address(); return ERR; }
              if( !get_command_suffix( ibufpp, &gflags ) ||
                  !mark_line_node( search_line_node( second_addr ), n ) )
                return ERR;
              break;
    case 'l':
    case 'n':
    case 'p': if( c == 'l' ) n = GLS; else if( c == 'n' ) n = GNP; else n = GPR;
              if( !check_current_addr( addr_cnt ) ||
                  !get_command_suffix( ibufpp, &gflags ) ||
                  !display_lines( first_addr, second_addr, gflags | n ) )
                return ERR;
              gflags = 0;
              break;
    case 'm': if( !check_current_addr( addr_cnt ) ||
                  !get_third_addr( ibufpp, &addr ) ) return ERR;
              if( addr >= first_addr && addr < second_addr )
                { set_error_msg( "Invalid destination" ); return ERR; }
              if( !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( !isglobal ) clear_undo_stack();
              if( !move_lines( first_addr, second_addr, addr, isglobal ) )
                return ERR;
              break;
    case 'P':
    case 'q':
    case 'Q': if( unexpected_address( addr_cnt ) ||
                  !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( c == 'P' ) prompt_on = !prompt_on;
              else if( modified() && !scripted() && c == 'q' &&
                       prev_status != EMOD ) return EMOD;
              else return QUIT;
              break;
    case 'r': if( unexpected_command_suffix( **ibufpp ) ) return ERR;
              if( addr_cnt == 0 ) second_addr = last_addr();
              fnp = get_filename( ibufpp );
              if( !fnp ) return ERR;
              if( !isglobal ) clear_undo_stack();
              if( !def_filename[0] && fnp[0] != '!' ) set_def_filename( fnp );
              if( traditional() && !fnp[0] && !def_filename[0] )
                { set_error_msg( "No current filename" ); return ERR; }
              addr = read_file( fnp[0] ? fnp : def_filename, second_addr );
              if( addr < 0 ) return ERR;
              if( addr ) set_modified( true );
              break;
    case 's': if( !command_s( ibufpp, &gflags, addr_cnt, isglobal ) )
                return ERR;
              break;
    case 't': if( !check_current_addr( addr_cnt ) ||
                  !get_third_addr( ibufpp, &addr ) ||
                  !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( !isglobal ) clear_undo_stack();
              if( !copy_lines( first_addr, second_addr, addr ) ) return ERR;
              break;
    case 'u': if( unexpected_address( addr_cnt ) ||
                  !get_command_suffix( ibufpp, &gflags ) ||
                  !undo( isglobal ) ) return ERR;
              break;
    case 'w':
    case 'W': n = **ibufpp;
              if( n == 'q' || n == 'Q' ) ++*ibufpp;
              if( unexpected_command_suffix( **ibufpp ) ) return ERR;
              fnp = get_filename( ibufpp );
              if( !fnp ) return ERR;
              if( addr_cnt == 0 && last_addr() == 0 )
                first_addr = second_addr = 0;
              else if( !check_addr_range( 1, last_addr(), addr_cnt ) )
                return ERR;
              if( !def_filename[0] && fnp[0] != '!' ) set_def_filename( fnp );
              if( traditional() && !fnp[0] && !def_filename[0] )
                { set_error_msg( "No current filename" ); return ERR; }
              addr = write_file( fnp[0] ? fnp : def_filename,
                     ( c == 'W' ) ? "a" : "w", first_addr, second_addr );
              if( addr < 0 ) return ERR;
              if( addr == last_addr() ) set_modified( false );
              else if( modified() && !scripted() && n == 'q' &&
                       prev_status != EMOD ) return EMOD;
              if( n == 'q' || n == 'Q' ) return QUIT;
              break;
    case 'x': if( second_addr < 0 || last_addr() < second_addr )
                { invalid_address(); return ERR; }
              if( !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              if( !isglobal ) clear_undo_stack();
              if( !put_lines( second_addr ) ) return ERR;
              break;
    case 'y': if( !check_current_addr( addr_cnt ) ||
                  !get_command_suffix( ibufpp, &gflags ) ||
                  !yank_lines( first_addr, second_addr ) ) return ERR;
              break;
    case 'z': first_addr = 1;
              if( !check_addr_range( first_addr, current_addr() +
                                     ( traditional() || !isglobal ), addr_cnt ) )
                return ERR;
              if( **ibufpp > '0' && **ibufpp <= '9' )
                { if( parse_int( &n, *ibufpp, ibufpp ) ) set_window_lines( n );
                  else return ERR; }
              if( !get_command_suffix( ibufpp, &gflags ) ||
                  !display_lines( second_addr, min( last_addr(), second_addr + window_lines() ),
                                  gflags ) )
                return ERR;
              gflags = 0;
              break;
    case '=': if( !get_command_suffix( ibufpp, &gflags ) ) return ERR;
              printf( "%d\n", addr_cnt ? second_addr : last_addr() );
              break;
    case '!': if( unexpected_address( addr_cnt ) ) return ERR;
              fnp = get_shell_command( ibufpp );
              if( !fnp ) return ERR;
              if( system( fnp + 1 ) < 0 )
                { set_error_msg( "Can't create shell process" ); return ERR; }
              if( !scripted() ) printf( "!\n" );
              break;
    case '\n': first_addr = 1;
              if( !check_addr_range( first_addr, current_addr() +
                                     ( traditional() || !isglobal ), addr_cnt ) ||
                  !display_lines( second_addr, second_addr, 0 ) )
                return ERR;
              break;
    case '#': while( *(*ibufpp)++ != '\n' ) ;
              break;
    default : set_error_msg( "Unknown command" ); return ERR;
    }
  if( gflags && !display_lines( current_addr(), current_addr(), gflags ) )
    return ERR;
  return 0;
  }