1 /*
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms are permitted
6 * provided that the above copyright notice and this paragraph are
7 * duplicated in all such forms and that any documentation,
8 * and/or other materials related to such
9 * distribution and use acknowledge that the software was developed
10 * by the University of California, Berkeley. The name of the
11 * University may not be used to endorse or promote products derived
12 * from this software without specific prior written permission.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16 */
17
18 /*
19 FUNCTION
20 <<getw>>---read a word (int)
21
22 INDEX
23 getw
24
25 SYNOPSIS
26 #include <stdio.h>
27 int getw(FILE *<[fp]>);
28
29 DESCRIPTION
30 <<getw>> is a function, defined in <<stdio.h>>. You can use <<getw>>
31 to get the next word from the file or stream identified by <[fp]>. As
32 a side effect, <<getw>> advances the file's current position
33 indicator.
34
35 RETURNS
36 The next word (read as an <<int>>), unless there is no more
37 data or the host system reports a read error; in either of these
38 situations, <<getw>> returns <<EOF>>. Since <<EOF>> is a valid
39 <<int>>, you must use <<ferror>> or <<feof>> to distinguish these
40 situations.
41
42 PORTABILITY
43 <<getw>> is a remnant of K&R C; it is not part of any ISO C Standard.
44 <<fread>> should be used instead. In fact, this implementation of
45 <<getw>> is based upon <<fread>>.
46
47 Supporting OS subroutines required: <<fread>>. */
48
49 #if defined(LIBC_SCCS) && !defined(lint)
50 static char sccsid[] = "%W% (Berkeley) %G%";
51 #endif /* LIBC_SCCS and not lint */
52
53 #define _DEFAULT_SOURCE
54 #include <_ansi.h>
55 #include <stdio.h>
56
57 int
getw(register FILE * fp)58 getw (register FILE *fp)
59 {
60 int result;
61 if (fread ((char*)&result, sizeof (result), 1, fp) != 1)
62 return EOF;
63 return result;
64 }
65
