Last change
on this file since 413 was 398, checked in by coas-nagasima, 5 years ago |
mbedTLS版Azure IoT Hub接続サンプルのソースコードを追加
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Property svn:eol-style
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Property svn:mime-type
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File size:
1.1 KB
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[398] | 1 | #include "stdio_impl.h"
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| 2 | #include "locale_impl.h"
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| 3 | #include <wchar.h>
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| 4 | #include <errno.h>
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| 5 |
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| 6 | static wint_t __fgetwc_unlocked_internal(FILE *f)
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| 7 | {
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| 8 | mbstate_t st = { 0 };
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| 9 | wchar_t wc;
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| 10 | int c;
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| 11 | unsigned char b;
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| 12 | size_t l;
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| 13 |
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| 14 | /* Convert character from buffer if possible */
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| 15 | if (f->rpos < f->rend) {
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| 16 | l = mbrtowc(&wc, (void *)f->rpos, f->rend - f->rpos, &st);
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| 17 | if (l+2 >= 2) {
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| 18 | f->rpos += l + !l; /* l==0 means 1 byte, null */
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| 19 | return wc;
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| 20 | }
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| 21 | if (l == -1) {
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| 22 | f->rpos++;
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| 23 | return WEOF;
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| 24 | }
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| 25 | } else l = -2;
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| 26 |
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| 27 | /* Convert character byte-by-byte */
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| 28 | while (l == -2) {
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| 29 | b = c = getc_unlocked(f);
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| 30 | if (c < 0) {
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| 31 | if (!mbsinit(&st)) errno = EILSEQ;
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| 32 | return WEOF;
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| 33 | }
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| 34 | l = mbrtowc(&wc, (void *)&b, 1, &st);
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| 35 | if (l == -1) return WEOF;
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| 36 | }
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| 37 |
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| 38 | return wc;
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| 39 | }
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| 40 |
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| 41 | wint_t __fgetwc_unlocked(FILE *f)
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| 42 | {
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| 43 | locale_t *ploc = &CURRENT_LOCALE, loc = *ploc;
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| 44 | if (f->mode <= 0) fwide(f, 1);
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| 45 | *ploc = f->locale;
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| 46 | wchar_t wc = __fgetwc_unlocked_internal(f);
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| 47 | *ploc = loc;
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| 48 | return wc;
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| 49 | }
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| 50 |
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| 51 | wint_t fgetwc(FILE *f)
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| 52 | {
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| 53 | wint_t c;
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| 54 | FLOCK(f);
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| 55 | c = __fgetwc_unlocked(f);
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| 56 | FUNLOCK(f);
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| 57 | return c;
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| 58 | }
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| 59 |
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| 60 | weak_alias(__fgetwc_unlocked, fgetwc_unlocked);
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| 61 | weak_alias(__fgetwc_unlocked, getwc_unlocked);
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