1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/* Copyright 2005, 2007 Shaun Jackman
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*/
/*
FUNCTION
<<dprintf>>, <<vdprintf>>---print to a file descriptor
INDEX
dprintf
INDEX
vdprintf
ANSI_SYNOPSIS
#include <stdio.h>
#include <stdarg.h>
int dprintf(int <[fd]>, const char *<[format]>, ...);
int vdprintf(int <[fd]>, const char *<[format]>, va_list <[ap]>);
int _dprintf_r(struct _reent *<[ptr]>, int <[fd]>,
const char *<[format]>, ...);
int _vdprintf_r(struct _reent *<[ptr]>, int <[fd]>,
const char *<[format]>, va_list <[ap]>);
DESCRIPTION
<<dprintf>> and <<vdprintf>> allow printing a format, similarly to
<<printf>>, but write to a file descriptor instead of to a <<FILE>>
stream.
The functions <<_dprintf_r>> and <<_vdprintf_r>> are simply
reentrant versions of the functions above.
RETURNS
The return value and errors are exactly as for <<write>>, except that
<<errno>> may also be set to <<ENOMEM>> if the heap is exhausted.
PORTABILITY
This function is originally a GNU extension in glibc and is not portable.
Supporting OS subroutines required: <<sbrk>>, <<write>>.
*/
#include <_ansi.h>
#include <reent.h>
#include <stdio.h>
#include <unistd.h>
#include <stdarg.h>
int
_DEFUN(_dprintf_r, (ptr, fd, format),
struct _reent *ptr _AND
int fd _AND
const char *format _DOTS)
{
va_list ap;
int n;
_REENT_SMALL_CHECK_INIT (ptr);
va_start (ap, format);
n = _vdprintf_r (ptr, fd, format, ap);
va_end (ap);
return n;
}
#ifndef _REENT_ONLY
int
_DEFUN(dprintf, (fd, format),
int fd _AND
const char *format _DOTS)
{
va_list ap;
int n;
struct _reent *ptr = _REENT;
_REENT_SMALL_CHECK_INIT (ptr);
va_start (ap, format);
n = _vdprintf_r (ptr, fd, format, ap);
va_end (ap);
return n;
}
#endif /* ! _REENT_ONLY */
|
