fputwc.c raw

   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);
  41