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- /*------------------------------------------------------------------------------
- GETLINE.C: Line Edited Character Input
-
- Copyright 1995 KEIL Software, Inc.
- ------------------------------------------------------------------------------*/
-
- #include <stdio.h>
-
- #define CNTLQ 0x11
- #define CNTLS 0x13
- #define DEL 0x7F
- #define BACKSPACE 0x08
- #define CR 0x0D
- #define LF 0x0A
-
- /***************/
- /* Line Editor */
- /***************/
- void getline (char idata *line, unsigned char n) {
- unsigned char cnt = 0;
- char c;
-
- do {
- if ((c = _getkey ()) == CR) c = LF; /* read character */
- if (c == BACKSPACE || c == DEL) { /* process backspace */
- if (cnt != 0) {
- cnt--; /* decrement count */
- line--; /* and line pointer */
- putchar (0x08); /* echo backspace */
- putchar (' ');
- putchar (0x08);
- }
- }
- else if (c != CNTLQ && c != CNTLS) { /* ignore Control S/Q */
- putchar (*line = c); /* echo and store character */
- line++; /* increment line pointer */
- cnt++; /* and count */
- }
- } while (cnt < n - 1 && c != LF); /* check limit and line feed */
- *line = 0; /* mark end of string */
- }
-