github.com/afumu/libc@v0.0.6/musl/src/stdio/fputwc.c (about)

     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);