void reset_undo_state( void ) { clear_undo_stack(); u_current_addr = u_last_addr = -1; u_modified = false; }
/* exec_global: apply command list in the command buffer to the active lines in a range; return command status */ long exec_global(int interact, int gflag) { static char *ocmd = NULL; static int ocmdsz = 0; line_t *lp = NULL; int status; int n; char *cmd = NULL; #ifdef BACKWARDS if (!interact) if (!strcmp(ibufp, "\n")) cmd = "p\n"; /* null cmd-list == `p' */ else if ((cmd = get_extended_line(&n, 0)) == NULL) return ERR; #else if (!interact && (cmd = get_extended_line(&n, 0)) == NULL) return ERR; #endif clear_undo_stack(); while ((lp = next_active_node()) != NULL) { if ((current_addr = get_line_node_addr(lp)) < 0) return ERR; if (interact) { /* print current_addr; get a command in global syntax */ if (display_lines(current_addr, current_addr, gflag) < 0) return ERR; while ((n = get_tty_line()) > 0 && ibuf[n - 1] != '\n') clearerr(stdin); if (n < 0) return ERR; else if (n == 0) { errmsg = "unexpected end-of-file"; return ERR; } else if (n == 1 && !strcmp(ibuf, "\n")) continue; else if (n == 2 && !strcmp(ibuf, "&\n")) { if (cmd == NULL) { errmsg = "no previous command"; return ERR; } else cmd = ocmd; } else if ((cmd = get_extended_line(&n, 0)) == NULL) return ERR; else { REALLOC(ocmd, ocmdsz, n + 1, ERR); memcpy(ocmd, cmd, n + 1); cmd = ocmd; } } ibufp = cmd; for (; *ibufp;) if ((status = extract_addr_range()) < 0 || (status = exec_command()) < 0 || (status > 0 && (status = display_lines( current_addr, current_addr, status)) < 0)) return status; } return 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; }