clearing a single line or block of lines

[mrchaos]

In C is there a way to clear a single line or a block of lines without affecting the text on the rest of the screen? Also, I assume that if I can clear a single line, I can also clear it after a certain point on the line.

Thx,
Steve

[jim mcnamara]

In standard console mode on ANSI-compliant terminals you can use ANSI escape sequences to do what you want.

This is from memory so you need to check it out, including typos.
For futher ref - check out ANSI escape sequences or ANSI.SYS on the net - google is best.

#define zout(c) memset(&c,0x00,sizeof(c))
#include <strings.h>

void setup(char*);
void linedel(int col,int row){ /*delete from col -> EOL on row */
      const char esc =27;
      char tmp[20];
      zout(tmp);
      setup(tmp);
      /* send esc[s esc[row;colH esc[K esc[u */
      printf("%s%s%s%d;%dH%s%s%s%s",
               tmp,"s",            
               tmp,row,col,        
               tmp,"K",            
               tmp,"u");           
      return;   
}

void setup(char * src){
      char *buf;
      buf=src;
      *buf++=27; /* escape */
      *buf++='[';  /* open sq bracket */
      *buf=0x00;
      return;
}