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1 | /*- |
2 | * Copyright (c) 1990 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Chris Torek. | |
7 | * | |
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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. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
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35 | */ |
36 | ||
2ce81398 | 37 | #if defined(LIBC_SCCS) && !defined(lint) |
af359dea | 38 | static char sccsid[] = "@(#)fwrite.c 5.5 (Berkeley) 2/24/91"; |
411867e7 | 39 | #endif /* LIBC_SCCS and not lint */ |
586c39b1 | 40 | |
411867e7 | 41 | #include <stdio.h> |
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42 | #include "local.h" |
43 | #include "fvwrite.h" | |
29468241 | 44 | |
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45 | /* |
46 | * Write `count' objects (each size `size') from memory to the given file. | |
47 | * Return the number of whole objects written. | |
48 | */ | |
49 | fwrite(buf, size, count, fp) | |
d25ccb19 | 50 | const void *buf; |
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51 | size_t size, count; |
52 | FILE *fp; | |
29468241 | 53 | { |
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54 | size_t n; |
55 | struct __suio uio; | |
56 | struct __siov iov; | |
57 | ||
d25ccb19 | 58 | iov.iov_base = (void *)buf; |
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59 | uio.uio_resid = iov.iov_len = n = count * size; |
60 | uio.uio_iov = &iov; | |
61 | uio.uio_iovcnt = 1; | |
29468241 | 62 | |
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63 | /* |
64 | * The usual case is success (__sfvwrite returns 0); | |
65 | * skip the divide if this happens, since divides are | |
66 | * generally slow and since this occurs whenever size==0. | |
67 | */ | |
68 | if (__sfvwrite(fp, &uio) == 0) | |
69 | return (count); | |
70 | return ((n - uio.uio_resid) / size); | |
29468241 | 71 | } |