1/*
2 * Copyright (C) 2007-2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#if defined(_WIN32)
18
19#include <unistd.h>
20
21#include <log/uio.h>
22
23#include "log_portability.h"
24
25LIBLOG_ABI_PUBLIC int readv(int fd, struct iovec *vecs, int count)
26{
27    int   total = 0;
28
29    for ( ; count > 0; count--, vecs++ ) {
30        char*  buf = vecs->iov_base;
31        int    len = vecs->iov_len;
32
33        while (len > 0) {
34            int  ret = read( fd, buf, len );
35            if (ret < 0) {
36                if (total == 0)
37                    total = -1;
38                goto Exit;
39            }
40            if (ret == 0)
41                goto Exit;
42
43            total += ret;
44            buf   += ret;
45            len   -= ret;
46        }
47    }
48Exit:
49    return total;
50}
51
52LIBLOG_ABI_PUBLIC int writev(int fd, const struct iovec *vecs, int count)
53{
54    int   total = 0;
55
56    for ( ; count > 0; count--, vecs++ ) {
57        const char*  buf = vecs->iov_base;
58        int          len = vecs->iov_len;
59
60        while (len > 0) {
61            int  ret = write( fd, buf, len );
62            if (ret < 0) {
63                if (total == 0)
64                    total = -1;
65                goto Exit;
66            }
67            if (ret == 0)
68                goto Exit;
69
70            total += ret;
71            buf   += ret;
72            len   -= ret;
73        }
74    }
75Exit:
76    return total;
77}
78
79#endif
80