Last change
on this file since 380 was 352, checked in by coas-nagasima, 6 years ago |
arm向けASP3版ECNL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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Rev | Line | |
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[352] | 1 | #include <wchar.h>
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| 2 |
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| 3 | size_t mbsnrtowcs(wchar_t *restrict wcs, const char **restrict src, size_t n, size_t wn, mbstate_t *restrict st)
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| 4 | {
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| 5 | size_t l, cnt=0, n2;
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| 6 | wchar_t *ws, wbuf[256];
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| 7 | const char *s = *src;
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| 8 | const char *tmp_s;
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| 9 |
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| 10 | if (!wcs) ws = wbuf, wn = sizeof wbuf / sizeof *wbuf;
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| 11 | else ws = wcs;
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| 12 |
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| 13 | /* making sure output buffer size is at most n/4 will ensure
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| 14 | * that mbsrtowcs never reads more than n input bytes. thus
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| 15 | * we can use mbsrtowcs as long as it's practical.. */
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| 16 |
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| 17 | while ( s && wn && ( (n2=n/4)>=wn || n2>32 ) ) {
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| 18 | if (n2>=wn) n2=wn;
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| 19 | tmp_s = s;
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| 20 | l = mbsrtowcs(ws, &s, n2, st);
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| 21 | if (!(l+1)) {
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| 22 | cnt = l;
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| 23 | wn = 0;
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| 24 | break;
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| 25 | }
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| 26 | if (ws != wbuf) {
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| 27 | ws += l;
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| 28 | wn -= l;
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| 29 | }
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| 30 | n = s ? n - (s - tmp_s) : 0;
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| 31 | cnt += l;
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| 32 | }
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| 33 | if (s) while (wn && n) {
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| 34 | l = mbrtowc(ws, s, n, st);
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| 35 | if (l+2<=2) {
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| 36 | if (!(l+1)) {
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| 37 | cnt = l;
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| 38 | break;
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| 39 | }
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| 40 | if (!l) {
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| 41 | s = 0;
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| 42 | break;
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| 43 | }
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| 44 | /* have to roll back partial character */
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| 45 | *(unsigned *)st = 0;
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| 46 | break;
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| 47 | }
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| 48 | s += l; n -= l;
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| 49 | /* safe - this loop runs fewer than sizeof(wbuf)/8 times */
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| 50 | ws++; wn--;
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| 51 | cnt++;
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| 52 | }
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| 53 | if (wcs) *src = s;
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| 54 | return cnt;
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| 55 | }
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