Terminal macros to use in C++ console programs

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Thanks  **[Duoas][] (** **[http://www.cplusplus.com/forum/unices/4380/][http_www.cplusplus.com_forum_unices_4380]** **).**

// vt100.h

/\*

----------------------------------------------

Terminal macros to use in C++ console programs

----------------------------------------------

Use the following macros in your C++ cout statements to manipulate the

video display. Most systems emulate either VT100 terminals or the ANSI

terminal protocol. If yours does not, these won't work until you find

an ANSI terminal driver.

The following macros are practically guaranteed to work:

clear\_screen

audible\_bell

goto\_xy()

move\_to()

default\_attributes

set\_reverse()

set\_colors()

finalize

The least likely to work are

show\_cursor()

set\_italic()

.............................................................................

Example usage:

cout << clear\_screen

<< goto\_xy( 10, 2 ) << "Hello";

To terminate your program, your code should look like this:

cout << finalize;

return EXIT\_SUCCESS;

.............................................................................

T H E   M A C R O S

cout << reset                       Restores the terminal to it's original

state.

You probably don't want to use this.

cout << clear\_screen                Clear the entire screen.

<< clear\_to\_bos                Clear from the top of the screen.

<< clear\_to\_eos                Clear to the bottom of the screen.

cout << clear\_to\_eol                Clear to the end of the line.

<< clear\_to\_bol                Clear to the beginning of the line.

<< clear\_line                  Clear the entire line.

cout << visual\_bell                 Blinks the screen (unreliable).

<< audible\_bell                Sounds the speaker beep.

cout << show\_cursor( TRUE )         Make the cursor visible (default)

<< show\_cursor( FALSE )        Make the cursor invisible

cout << goto\_xy( x, y )             Move the cursor to coordinate (x, y),

or (column x, line y), where (1, 1)

is the upper-left corner of the screen.

<< move\_to( line, column )     Same.

cout << cursor\_up(    count )       Move the cursor "count" characters

<< cursor\_down(  count )       (or lines) from its current position.

<< cursor\_left(  count )

<< cursor\_right( count )

cout << set\_scrolling\_region( top, bottom )

Set the lines in the range \[top,bottom\]

to be those that scroll.

<< scroll\_up(   count )        Scroll the region up or down "count"

<< scroll\_down( count )        lines.

cout << insert\_line( count )        Insert or delete "count" items.

<< delete\_line( count )        Always inserts blanks.

<< insert\_char( count )        The result is affected if you change

<< delete\_char( count )        the scroll region.

cout << default\_attributes          Reset so that the cursor attributes are

the default (no bold, underline, etc.

and colors are VT\_DEFAULT).

<< set\_bold( bool )            Bold text.

<< set\_italic( bool )          Italic text.

<< set\_underline( bool )       Underline text.

<< set\_reverse( bool )         Reverse or invert the text colors.

<< set\_attributes( bold, italic, underline, reverse )

Set all four text attributes at once

without affecting the color attributes.

<< set\_colors( fg, bg )        The colors are

VT\_BLACK    VT\_YELLOW    VT\_CYAN

VT\_RED      VT\_BLUE      VT\_WHITE

VT\_GREEN    VT\_MAGENTA   VT\_DEFAULT

cout << finalize                    Do this before your program ends.

(Alias for default\_attributes.)

.............................................................................

Lastly

All this does is drive some basic functionality of a VT100/ANSI terminal.

Notibly, it lacks:

\* The ability to tell you where the cursor is (so you must remember!)

\* The ability to tell you the size of the terminal screen.

(You can use "stty size" at the command prompt to find out.)

\* The ability to get just one character from the keyboard.

This takes some jumping through a few hoops. If you want to do some more

advanced stuff than what is presented here, consider using the ncurses

library (type "man ncurses" at the prompt).

(Here at RU, you'll have to include </usr/local/include/ncurses.h>

instead of just plain old <ncurses.h> to make curses work. Don't forget

to compile with "g++ ... -lncurses"!)

If you're interested in this kind of junk, type "man screen" at the prompt.

Enjoy!

--Michael Thomas Greer

\*/

\#ifndef VT100\_MACRO\_H

\#define VT100\_MACRO\_H

\#ifndef TRUE

\#define TRUE (1)

\#endif

\#ifndef FALSE

\#define FALSE (0)

\#endif

\#define VT\_BLACK    0

\#define VT\_RED      1

\#define VT\_GREEN    2

\#define VT\_YELLOW   3

\#define VT\_BLUE     4

\#define VT\_MAGENTA  5

\#define VT\_CYAN     6

\#define VT\_WHITE    7

\#define VT\_DEFAULT  9

\#define reset "\\33c"

\#define clear\_screen "\\33\[2J"

\#define clear\_to\_bos "\\33\[1J"

\#define clear\_to\_eos "\\33\[J"

\#define clear\_line   "\\33\[2K"

\#define clear\_to\_bol "\\33\[1K"

\#define clear\_to\_eol "\\33\[K"

\#define visual\_bell  "\\33g"

\#define audible\_bell "\\a"

\#define show\_cursor( v ) ((v) ? "\\33\\67p" : "\\33\\66p")

\#define goto\_xy( x, y ) "\\33\[" << y << ";" << x << "H"

\#define move\_to( y, x ) "\\33\[" << y << ";" << x << "f"

\#define cursor\_up(    count ) "\\33\[" << count << "A"

\#define cursor\_down(  count ) "\\33\[" << count << "B"

\#define cursor\_right( count ) "\\33\[" << count << "C"

\#define cursor\_left(  count ) "\\33\[" << count << "D"

\#define set\_scrolling\_region( top, bottom ) "\\33\[" << top << ";" << bottom << "r"

\#define scroll\_up(   count ) "\\33\[" << count << "S"

\#define scroll\_down( count ) "\\33\[" << count << "T"

\#define insert\_line( count ) "\\33\[" << count << "L"

\#define delete\_line( count ) "\\33\[" << count << "M"

\#define insert\_char( count ) "\\33\[" << count << "@"

\#define delete\_char( count ) "\\33\[" << count << "P"

static bool is\_b = FALSE;

static bool is\_i = FALSE;

static bool is\_u = FALSE;

static bool is\_r = FALSE;

static int  fg\_c = VT\_DEFAULT;

static int  bg\_c = VT\_DEFAULT;

\#define default\_attributes "\\33\[0m"

// these four following are not meant to be used externally

\#define set\_b( b ) ((is\_b = b) ? "\\33\[1m" : "")

\#define set\_i( i ) ((is\_i = i) ? "\\33\[3m" : "")

\#define set\_u( u ) ((is\_u = u) ? "\\33\[4m" : "")

\#define set\_r( r ) ((is\_r = r) ? "\\33\[7m" : "")

\#define set\_colors( fg, bg ) "\\33\[3" << (fg\_c = fg) << ";4" << (bg\_c = bg) << "m"

\#define set\_attributes( b, i, u, r ) set\_b( b ) << set\_i( i ) << set\_u( u ) << set\_r( r ) << set\_colors( fg\_c, bg\_c )

\#define set\_bold(      b ) default\_attributes << set\_attributes( b, is\_i, is\_u, is\_r )

\#define set\_italic(    i ) default\_attributes << set\_attributes( is\_b, i, is\_u, is\_r )

\#define set\_underline( u ) default\_attributes << set\_attributes( is\_b, is\_i, u, is\_r )

\#define set\_reverse(   r ) default\_attributes << set\_attributes( is\_b, is\_i, is\_u, r )

\#define finalize default\_attributes

\#endif

// end vt100.h

转载于:https://www.cnblogs.com/alli/archive/2010/10/12/1849090.html

[Duoas]: http://www.cplusplus.com/member/Duoas/
[http_www.cplusplus.com_forum_unices_4380]: http://www.cplusplus.com/forum/unices/4380/

Terminal macros to use in C++ console programs

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