libc-top-half/musl/src/stdio/fputwc.c

   1 #include "stdio_impl.h"
   2 #include "locale_impl.h"
   3 #include <wchar.h>
   4 #include <limits.h>
   5 #include <ctype.h>
   6
   7 wint_t __fputwc_unlocked(wchar_t c, FILE *f)
   8 {
   9         char mbc[MB_LEN_MAX];
  10         int l;
  11         locale_t *ploc = &CURRENT_LOCALE, loc = *ploc;
  12
  13         if (f->mode <= 0) fwide(f, 1);
  14         *ploc = f->locale;
  15
  16         if (isascii(c)) {
  17                 c = putc_unlocked(c, f);
  18         } else if (f->wpos + MB_LEN_MAX < f->wend) {
  19                 l = wctomb((void *)f->wpos, c);
  20                 if (l < 0) c = WEOF;
  21                 else f->wpos += l;
  22         } else {
  23                 l = wctomb(mbc, c);
  24                 if (l < 0 || __fwritex((void *)mbc, l, f) < l) c = WEOF;
  25         }
  26         if (c==WEOF) f->flags |= F_ERR;
  27         *ploc = loc;
  28         return c;
  29 }
  30
  31 wint_t fputwc(wchar_t c, FILE *f)
  32 {
  33         FLOCK(f);
  34         c = __fputwc_unlocked(c, f);
  35         FUNLOCK(f);
  36         return c;
  37 }
  38
  39 weak_alias(__fputwc_unlocked, fputwc_unlocked);
  40 weak_alias(__fputwc_unlocked, putwc_unlocked);