Last change
on this file since 445 was 444, checked in by coas-nagasima, 4 years ago |
muslのソースコードを追加
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Property svn:eol-style
set to
native
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Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
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File size:
836 bytes
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Line | |
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1 | #include "stdio_impl.h"
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2 | #include <sys/uio.h>
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3 |
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4 | size_t __stdio_write(FILE *f, const unsigned char *buf, size_t len)
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5 | {
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6 | struct iovec iovs[2] = {
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7 | { .iov_base = f->wbase, .iov_len = f->wpos-f->wbase },
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8 | { .iov_base = (void *)buf, .iov_len = len }
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9 | };
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10 | struct iovec *iov = iovs;
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11 | size_t rem = iov[0].iov_len + iov[1].iov_len;
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12 | int iovcnt = 2;
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13 | ssize_t cnt;
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14 | for (;;) {
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15 | cnt = syscall(SYS_writev, f->fd, iov, iovcnt);
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16 | if (cnt == rem) {
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17 | f->wend = f->buf + f->buf_size;
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18 | f->wpos = f->wbase = f->buf;
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19 | return len;
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20 | }
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21 | if (cnt < 0) {
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22 | f->wpos = f->wbase = f->wend = 0;
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23 | f->flags |= F_ERR;
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24 | return iovcnt == 2 ? 0 : len-iov[0].iov_len;
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25 | }
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26 | rem -= cnt;
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27 | if (cnt > iov[0].iov_len) {
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28 | cnt -= iov[0].iov_len;
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29 | iov++; iovcnt--;
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30 | }
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31 | iov[0].iov_base = (char *)iov[0].iov_base + cnt;
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32 | iov[0].iov_len -= cnt;
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33 | }
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34 | return -1;
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35 | }
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