1 #include "stdio_impl.h" 2 __towrite(FILE * f)3int __towrite(FILE *f) 4 { 5 f->mode |= f->mode-1; 6 if (f->flags & F_NOWR) { 7 f->flags |= F_ERR; 8 return EOF; 9 } 10 /* Clear read buffer (easier than summoning nasal demons) */ 11 f->rpos = f->rend = 0; 12 13 /* Alloc file buffer if needed */ 14 if (__falloc_buf(f) < 0) { 15 f->flags |= F_ERR; 16 return EOF; 17 } 18 19 /* Activate write through the buffer. */ 20 f->wpos = f->wbase = f->buf; 21 f->wend = f->buf + f->buf_size; 22 return 0; 23 } 24 __towrite_needs_stdio_exit()25hidden void __towrite_needs_stdio_exit() 26 { 27 __stdio_exit_needed(); 28 } 29