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 <<putc>>---write a character (macro)
21
22 INDEX
23 putc
24 INDEX
25 _putc_r
26
27 SYNOPSIS
28 #include <stdio.h>
29 int putc(int <[ch]>, FILE *<[fp]>);
30
31 #include <stdio.h>
32 int putc( int <[ch]>, FILE *<[fp]>);
33
34 DESCRIPTION
35 <<putc>> is a macro, defined in <<stdio.h>>. <<putc>>
36 writes the argument <[ch]> to the file or stream identified by
37 <[fp]>, after converting it from an <<int>> to an <<unsigned char>>.
38
39 If the file was opened with append mode (or if the stream cannot
40 support positioning), then the new character goes at the end of the
41 file or stream. Otherwise, the new character is written at the
42 current value of the position indicator, and the position indicator
43 advances by one.
44
45 For a subroutine version of this macro, see <<fputc>>.
46
47 The <<_putc_r>> function is simply the reentrant version of
48 <<putc>> that takes an additional reentrant structure argument: <[ptr]>.
49
50 RETURNS
51 If successful, <<putc>> returns its argument <[ch]>. If an error
52 intervenes, the result is <<EOF>>. You can use `<<ferror(<[fp]>)>>' to
53 query for errors.
54
55 PORTABILITY
56 ANSI C requires <<putc>>; it suggests, but does not require, that
57 <<putc>> be implemented as a macro. The standard explicitly permits
58 macro implementations of <<putc>> to use the <[fp]> argument more than once;
59 therefore, in a portable program, you should not use an expression
60 with side effects as this argument.
61
62 Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
63 <<lseek>>, <<read>>, <<sbrk>>, <<write>>.
64 */
65
66 #if defined(LIBC_SCCS) && !defined(lint)
67 static char sccsid[] = "%W% (Berkeley) %G%";
68 #endif /* LIBC_SCCS and not lint */
69
70 #define _DEFAULT_SOURCE
71 #include <_ansi.h>
72 #include <stdio.h>
73 #include "local.h"
74
75 /*
76 * A subroutine version of the macro putc.
77 */
78
79 #undef putc
80
81 int
putc(int c,register FILE * fp)82 putc (
83 int c,
84 register FILE *fp)
85 {
86 int result;
87 CHECK_INIT (ptr, fp);
88 _newlib_flockfile_start (fp);
89 result = _sputc ( c, fp);
90 _newlib_flockfile_end (fp);
91 return result;
92 }
93
