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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1 | #include "stdio_impl.h"
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2 | #include <string.h>
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3 | #include <inttypes.h>
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4 | #include <errno.h>
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5 |
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6 | #define MIN(a,b) ((a)<(b) ? (a) : (b))
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7 |
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8 | ssize_t getdelim(char **restrict s, size_t *restrict n, int delim, FILE *restrict f)
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9 | {
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10 | char *tmp;
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11 | unsigned char *z;
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12 | size_t k;
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13 | size_t i=0;
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14 | int c;
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15 |
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16 | FLOCK(f);
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17 |
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18 | if (!n || !s) {
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19 | f->flags |= F_ERR;
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20 | FUNLOCK(f);
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21 | errno = EINVAL;
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22 | return -1;
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23 | }
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24 |
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25 | if (!*s) *n=0;
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26 |
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27 | for (;;) {
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28 | z = memchr(f->rpos, delim, f->rend - f->rpos);
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29 | k = z ? z - f->rpos + 1 : f->rend - f->rpos;
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30 | if (i+k+1 >= *n) {
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31 | if (k >= SIZE_MAX/2-i) goto oom;
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32 | size_t m = i+k+2;
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33 | if (!z && m < SIZE_MAX/4) m += m/2;
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34 | tmp = realloc(*s, m);
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35 | if (!tmp) {
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36 | m = i+k+2;
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37 | tmp = realloc(*s, m);
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38 | if (!tmp) goto oom;
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39 | }
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40 | *s = tmp;
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41 | *n = m;
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42 | }
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43 | memcpy(*s+i, f->rpos, k);
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44 | f->rpos += k;
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45 | i += k;
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46 | if (z) break;
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47 | if ((c = getc_unlocked(f)) == EOF) {
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48 | if (!i || !feof(f)) {
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49 | FUNLOCK(f);
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50 | return -1;
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51 | }
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52 | break;
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53 | }
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54 | if (((*s)[i++] = c) == delim) break;
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55 | }
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56 | (*s)[i] = 0;
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57 |
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58 | FUNLOCK(f);
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59 |
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60 | return i;
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61 | oom:
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62 | f->flags |= F_ERR;
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63 | FUNLOCK(f);
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64 | errno = ENOMEM;
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65 | return -1;
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66 | }
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67 |
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68 | weak_alias(getdelim, __getdelim);
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