root / prex-0.9.0 / usr / lib / libc / stdio / stdio.c @ 03e9c04a
History | View | Annotate | Download (2.28 KB)
1 |
/*-
|
---|---|
2 |
* Copyright (c) 1990, 1993
|
3 |
* The Regents of the University of California. All rights reserved.
|
4 |
*
|
5 |
* This code is derived from software contributed to Berkeley by
|
6 |
* Chris Torek.
|
7 |
*
|
8 |
* Redistribution and use in source and binary forms, with or without
|
9 |
* modification, are permitted provided that the following conditions
|
10 |
* are met:
|
11 |
* 1. Redistributions of source code must retain the above copyright
|
12 |
* notice, this list of conditions and the following disclaimer.
|
13 |
* 2. Redistributions in binary form must reproduce the above copyright
|
14 |
* notice, this list of conditions and the following disclaimer in the
|
15 |
* documentation and/or other materials provided with the distribution.
|
16 |
* 3. Neither the name of the University nor the names of its contributors
|
17 |
* may be used to endorse or promote products derived from this software
|
18 |
* without specific prior written permission.
|
19 |
*
|
20 |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
21 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
22 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
23 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
24 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
25 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
26 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
27 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
28 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
29 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
30 |
* SUCH DAMAGE.
|
31 |
*/
|
32 |
|
33 |
#include <fcntl.h> |
34 |
#include <unistd.h> |
35 |
#include <stdio.h> |
36 |
#include "local.h" |
37 |
|
38 |
/*
|
39 |
* Small standard I/O/seek/close functions.
|
40 |
* These maintain the `known seek offset' for seek optimisation.
|
41 |
*/
|
42 |
int
|
43 |
__sread(fp, buf, n) |
44 |
FILE *fp; |
45 |
char *buf;
|
46 |
int n;
|
47 |
{ |
48 |
return (read(fp->_file, buf, n));
|
49 |
} |
50 |
|
51 |
int
|
52 |
__swrite(fp, buf, n) |
53 |
FILE *fp; |
54 |
char const *buf; |
55 |
int n;
|
56 |
{ |
57 |
if (fp->_flags & __SAPP)
|
58 |
(void) lseek(fp->_file, (off_t)0, SEEK_END); |
59 |
return (write(fp->_file, buf, n));
|
60 |
} |
61 |
|
62 |
fpos_t |
63 |
__sseek(fp, offset, whence) |
64 |
FILE *fp; |
65 |
fpos_t offset; |
66 |
int whence;
|
67 |
{ |
68 |
return (lseek(fp->_file, (off_t)offset, whence));
|
69 |
} |
70 |
|
71 |
int
|
72 |
__sclose(fp) |
73 |
FILE *fp; |
74 |
{ |
75 |
return (close(fp->_file));
|
76 |
} |