backspace.c File Reference

Provides functionality to perform backspace operations by a specified number of characters. More...

#include "mdb.h"

Go to the source code of this file.

Functions
void	backspace (long n)
	Backspace by a specified number of characters.

Detailed Description

Provides functionality to perform backspace operations by a specified number of characters.

Copyright

• (c) 2002 The University of Chicago, as Operator of Argonne National Laboratory.
• (c) 2002 The Regents of the University of California, as Operator of Los Alamos National Laboratory.

License

This file is distributed under the terms of the Software License Agreement found in the file LICENSE included with this distribution.

Author

C. Saunders, R. Soliday

Definition in file backspace.c.

Function Documentation

backspace()

void backspace

(

long

n

)

Backspace by a specified number of characters.

This function outputs a specified number of backspace characters (\b) to the standard output. It dynamically allocates and reuses a buffer to store the backspace characters, optimizing memory usage for repeated calls with varying numbers of backspaces.

Parameters

n	The number of characters to backspace.

Definition at line 26 of file backspace.c.

                       {
  static char *bspace = NULL;
  static long n_bspace = 0;
 
  if (n > n_bspace) {
    register long i;
    bspace = trealloc(bspace, sizeof(*bspace) * (n + 1));
    for (i = n_bspace; i < n; i++)
      bspace[i] = '\b';
    n_bspace = n;
  }
  bspace[n] = 0;
  fputs(bspace, stdout);
  bspace[n] = '\b';
}