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    Length: 1923 (0x783)
    Types: TextFile
    Names: »key.c«

└─⟦b20c6495f⟧ Bits:30007238 EUUGD18: Wien-båndet, efterår 1987
    └─⟦this⟧ »EUUGD18/General/Abermud/key.c« 

TextFile

/*  Key drivers */
#include "kernel.h"
#include <sgtty.h>
#ifdef	RCSID
static char RCS[] =
	"$Header: key.c,v 1.1 89/03/13 09:36:33 rsalz Exp $";
#endif	/* RCSID */


static char *pr_bf;
long save_flag = -1;

keysetup() {

  struct sgttyb x;

  gtty(fileno(stdin), &x);
  save_flag = x.sg_flags;
  x.sg_flags &= ~ECHO;
  x.sg_flags |= CBREAK;
  stty(fileno(stdin), &x);
}

keysetback() {

  struct sgttyb x;

  if(save_flag == -1) return;
  gtty(fileno(stdin), &x);
  x.sg_flags = save_flag;
  stty(fileno(stdin), &x);
}


key_input(ppt, len_max)
    char *ppt;
    int len_max;
{
    int len_cur = 0, tmp;
    char x;

    key_mode = 1;
    pr_bf = ppt;
    bprintf("%s", ppt);
    pbfr();
    pr_due = 0;
    *key_buff = '\0';
    while(len_cur < len_max) {
      switch (x = getchar()) {
      case '\n':                                /* return */
	putchar('\n'); 
	key_mode = 0;
	return;
      case 18:                                 /* ctrl-r */
        for (tmp = len_cur; tmp; tmp--) {
          putchar(8);
          putchar(' ');
          putchar(8);
        }
        printf("%s", key_buff);
        continue;
      case 21:                                 /* ctrl-u */
        for (tmp = len_cur; tmp; tmp--) {
          putchar(8);
          putchar(' ');
          putchar(8);
        }
        key_buff[len_cur = 0] = '\0';
        continue;
      case 8:                                  /* backspace and del */
      case 127:
        if(!len_cur) continue;
	putchar(8);
	putchar(' ');
	putchar(8);
	len_cur--;
	key_buff[len_cur] = '\0';
	continue;
      default:                                 /* insert to key_buff */
        if (x < 32) continue;
        putchar(x); 
        key_buff[len_cur++] = x;
        key_buff[len_cur] = '\0';
      }
    }
  }

key_reprint()
{
    pr_qcr = 1;
    pbfr();
    if (pr_due && key_mode)
	printf("\n%s%s", pr_bf, key_buff);
    fflush(stdout);
    pr_due = 0;
}