minix/lib/ack/libp/incpt.c
2009-11-09 10:26:00 +00:00

75 lines
1.4 KiB
C

/* $Header$ */
/*
* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
*
* This product is part of the Amsterdam Compiler Kit.
*
* Permission to use, sell, duplicate or disclose this software must be
* obtained in writing. Requests for such permissions may be sent to
*
* Dr. Andrew S. Tanenbaum
* Wiskundig Seminarium
* Vrije Universiteit
* Postbox 7161
* 1007 MC Amsterdam
* The Netherlands
*
*/
/* Author: J.W. Stevenson */
#include <pc_file.h>
#include <pc_err.h>
#define EINTR 4
extern int errno;
extern _trp();
extern int _read();
_incpt(f) struct file *f; {
if (f->flags & EOFBIT)
_trp(EEOF);
f->flags |= WINDOW;
f->flags &= ~ELNBIT;
#ifdef CPM
do {
#endif
f->ptr += f->size;
if (f->count == 0) {
f->ptr = f->bufadr;
for(;;) {
f->count=_read(f->ufd,f->bufadr,f->buflen);
if ( f->count<0 ) {
if (errno != EINTR) _trp(EREAD) ;
continue ;
}
break ;
}
if (f->count == 0) {
f->flags |= EOFBIT;
*f->ptr = '\0';
return;
}
}
if ((f->count -= f->size) < 0)
_trp(EFTRUNC);
#ifdef CPM
} while ((f->flags&TXTBIT) && *f->ptr == '\r');
#endif
if (f->flags & TXTBIT) {
if (*f->ptr & 0200)
_trp(EASCII);
if (*f->ptr == '\n') {
f->flags |= ELNBIT;
*f->ptr = ' ';
}
#ifdef CPM
if (*f->ptr == 26) {
f->flags |= EOFBIT;
*f->ptr = 0;
}
#endif
}
}