source: buchla-68k/libcio/getc.c@ 0580615

Last change on this file since 0580615 was 0580615, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Point of no return.

  • Property mode set to 100644
File size: 829 bytes
Line 
1/*
2 ============================================================================
3 getc.c -- get a character from a stream file
4 Version 3 -- 1987-09-22 -- D.N. Lynx Crowe
5 ============================================================================
6*/
7
8#include "stdio.h"
9#include "stddefs.h"
10
11int getc(FILE *ptr)
12{
13 register int len;
14
15 if (ptr->_bp >= ptr->_bend) { /* see if the buffer is empty */
16
17 if (ptr->_flags & _EOF) /* check EOF status */
18 return(EOF);
19
20 ptr->_flags &= ~_DIRTY; /* reset the dirty buffer bit */
21
22 if (ptr->_buff EQ NULL) /* get a buffer if none exists */
23 getbuff(ptr);
24
25 if ((len = read(ptr->_unit, ptr->_buff, ptr->_buflen)) LE 0) {
26
27 ptr->_flags |= ((len EQ 0) ? _EOF : _IOERR);
28 return(EOF);
29 }
30
31 ptr->_bend = (ptr->_bp = ptr->_buff) + len;
32 }
33
34 return(*ptr->_bp++ & 0xFF);
35}
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