__overflow.c raw

   1  #include "stdio_impl.h"
   2  
   3  int __overflow(FILE *f, int _c)
   4  {
   5  	unsigned char c = _c;
   6  	if (!f->wend && __towrite(f)) return EOF;
   7  	if (f->wpos != f->wend && c != f->lbf) return *f->wpos++ = c;
   8  	if (f->write(f, &c, 1)!=1) return EOF;
   9  	return c;
  10  }
  11