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:
1.1 KB
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Line | |
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1 | #include "stdio_impl.h"
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2 | #include <limits.h>
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3 | #include <string.h>
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4 | #include <errno.h>
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5 | #include <stdint.h>
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6 | #include <wchar.h>
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7 |
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8 | struct cookie {
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9 | wchar_t *ws;
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10 | size_t l;
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11 | };
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12 |
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13 | static size_t sw_write(FILE *f, const unsigned char *s, size_t l)
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14 | {
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15 | size_t l0 = l;
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16 | int i = 0;
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17 | struct cookie *c = f->cookie;
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18 | if (s!=f->wbase && sw_write(f, f->wbase, f->wpos-f->wbase)==-1)
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19 | return -1;
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20 | while (c->l && l && (i=mbtowc(c->ws, (void *)s, l))>=0) {
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21 | s+=i;
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22 | l-=i;
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23 | c->l--;
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24 | c->ws++;
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25 | }
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26 | *c->ws = 0;
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27 | if (i < 0) {
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28 | f->wpos = f->wbase = f->wend = 0;
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29 | f->flags |= F_ERR;
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30 | return i;
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31 | }
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32 | f->wend = f->buf + f->buf_size;
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33 | f->wpos = f->wbase = f->buf;
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34 | return l0;
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35 | }
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36 |
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37 | int vswprintf(wchar_t *restrict s, size_t n, const wchar_t *restrict fmt, va_list ap)
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38 | {
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39 | int r;
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40 | FILE f;
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41 | unsigned char buf[256];
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42 | struct cookie c = { s, n-1 };
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43 |
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44 | memset(&f, 0, sizeof(FILE));
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45 | f.lbf = EOF;
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46 | f.write = sw_write;
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47 | f.buf_size = sizeof buf;
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48 | f.buf = buf;
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49 | f.lock = -1;
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50 | f.cookie = &c;
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51 | if (!n) {
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52 | return -1;
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53 | } else if (n > INT_MAX) {
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54 | errno = EOVERFLOW;
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55 | return -1;
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56 | }
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57 | r = vfwprintf(&f, fmt, ap);
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58 | sw_write(&f, 0, 0);
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59 | return r>=n ? -1 : r;
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60 | }
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