2 * Copyright (c) 1990 The Regents of the University of California.
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.
20 <<putc>>---write a character (macro)
29 int putc(int <[ch]>, FILE *<[fp]>);
32 int _putc_r(struct _reent *<[ptr]>, int <[ch]>, FILE *<[fp]>);
36 int putc(<[ch]>, <[fp]>)
41 int _putc_r(<[ptr]>, <[ch]>, <[fp]>)
42 struct _reent *<[ptr]>;
47 <<putc>> is a macro, defined in <<stdio.h>>. <<putc>>
48 writes the argument <[ch]> to the file or stream identified by
49 <[fp]>, after converting it from an <<int>> to an <<unsigned char>>.
51 If the file was opened with append mode (or if the stream cannot
52 support positioning), then the new character goes at the end of the
53 file or stream. Otherwise, the new character is written at the
54 current value of the position indicator, and the position indicator
57 For a subroutine version of this macro, see <<fputc>>.
59 The <<_putc_r>> function is simply the reentrant version of
60 <<putc>> that takes an additional reentrant structure argument: <[ptr]>.
63 If successful, <<putc>> returns its argument <[ch]>. If an error
64 intervenes, the result is <<EOF>>. You can use `<<ferror(<[fp]>)>>' to
68 ANSI C requires <<putc>>; it suggests, but does not require, that
69 <<putc>> be implemented as a macro. The standard explicitly permits
70 macro implementations of <<putc>> to use the <[fp]> argument more than once;
71 therefore, in a portable program, you should not use an expression
72 with side effects as this argument.
74 Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
75 <<lseek>>, <<read>>, <<sbrk>>, <<write>>.
78 #if defined(LIBC_SCCS) && !defined(lint)
79 static char sccsid[] = "%W% (Berkeley) %G%";
80 #endif /* LIBC_SCCS and not lint */
87 * A subroutine version of the macro putc.
93 _DEFUN(_putc_r, (ptr, c, fp),
94 struct _reent *ptr _AND
101 result = __sputc_r (ptr, c, fp);
108 _DEFUN(putc, (c, fp),
112 #if !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__)
114 CHECK_INIT (_REENT, fp);
116 result = __sputc_r (_REENT, c, fp);
120 return _putc_r (_REENT, c, fp);
123 #endif /* !_REENT_ONLY */