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 * advertising materials, and 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 ANSI_SYNOPSIS
26 #include <stdio.h>
27 int getw(FILE *<[fp]>);
28
29 TRAD_SYNOPSIS
30 #include <stdio.h>
31 int getw(<[fp]>)
32 FILE *<[fp]>;
33
34 DESCRIPTION
35 <<getw>> is a function, defined in <<stdio.h>>. You can use <<getw>>
36 to get the next word from the file or stream identified by <[fp]>. As
37 a side effect, <<getw>> advances the file's current position
38 indicator.
39
40 RETURNS The next word (read as an <<int>>), unless there is no more
41 data, or the host system reports a read error; in either of these
42 situations, <<getw>> returns <<EOF>>. Since <<EOF>> is a valid
43 <<int>>, you must use <<ferror>> or <<feof>> to distinguish these
44 situations.
45
46 PORTABILITY
47 <<getw>> is a remnant of K&R C, it is not part of any ISO C Standard.
48 <<fread>> should be used instead. In fact, this implementation of
49 <<getw>> is based upon <<fread>>.
50
51 Supporting OS subroutines required: <<fread>>. */
52
53 #if defined(LIBC_SCCS) && !defined(lint)
54 static char sccsid[] = "%W% (Berkeley) %G%";
55 #endif /* LIBC_SCCS and not lint */
56
57 #include <stdio.h>
58
59 int
getw(fp)60 getw (fp)
61 register FILE *fp;
62 {
63 int result;
64 if (fread((char*)&result, sizeof(result), 1, fp) != 1)
65 return EOF;
66 return result;
67 }
68