| /* mvme-read.c -- read bytes from a input device. |
| * |
| * Copyright (c) 1996 Cygnus Support |
| * |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice is included verbatim in any distributions. No written agreement, |
| * license, or royalty fee is required for any of the authorized uses. |
| * Modifications to this software may be copyrighted by their authors |
| * and need not follow the licensing terms described here, provided that |
| * the new terms are clearly indicated on the first page of each file where |
| * they apply. |
| */ |
| |
| extern int inbyte (); |
| extern char * __inln (); |
| |
| /* |
| * read -- read bytes from the serial port. Ignore fd, since |
| * we only have stdin. |
| */ |
| int |
| read (fd, buf, nbytes) |
| int fd; |
| char *buf; |
| int nbytes; |
| { |
| if (nbytes >= 256) |
| { |
| char *read_end = __inln (buf); |
| *read_end = '\n'; |
| return read_end - buf + 1; |
| } |
| else |
| { |
| int i, c; |
| for (i = 0; i < nbytes; i++) { |
| *buf++ = c = inbyte (); |
| if (c == '\n' || c == '\r') { |
| buf[-1] = '\n'; /* convert \r to \n */ |
| buf[0] = '\0'; |
| break; |
| } |
| } |
| |
| return i; |
| } |
| } |