curs_addch - Linux

Overview

curs_addch() is a Linux command that adds a character to the cursor’s current position in the virtual screen buffer. It is designed for use with curses, a library for terminal control in text-based user interfaces (TUIs).

Syntax

int curs_addch(const chtype ch);

Options/Flags

• ch: The character to be added. This can be a single character, a control character, or a multi-byte character.

Examples

Simple example

#include <stdlib.h>
#include <curses.h>

int main() {
  initscr();
  curs_addch('A');
  refresh();
  getch();
  endwin();
  return 0;
}

Complex example

#include <stdlib.h>
#include <curses.h>

int main() {
  initscr();
  curs_addch('\033');  // Control-C
  curs_addch('[');     // Open bracket
  curs_addch('2');     // Move cursor down two lines
  curs_addch('J');     // Clear screen from cursor down
  refresh();
  getch();
  endwin();
  return 0;
}

Common Issues

One common issue is that curs_addch() will move the cursor forward by one position, even if the character is a multi-byte character. To avoid this, use wadd_wch() instead.

Integration

curs_addch() can be integrated with other curses functions to create complex and visually appealing TUIs. For example, it can be used with move() to move the cursor to a specific position, and with attrset() to change the appearance of the character being added.

Related Commands

• move: Moves the cursor to a specific position.
• addch: Adds a character to the current cursor position in the standard output buffer.
• waddch: Adds a character to the current cursor position in a specified window.