1#include "stdio_impl.h" 2 3size_t __freadahead(FILE *f) 4{ 5 return f->rend - f->rpos; 6} 7 8const char *__freadptr(FILE *f, size_t *sizep) 9{ 10 size_t size = f->rend - f->rpos; 11 if (!size) return 0; 12 *sizep = size; 13 return (const char *)f->rpos; 14} 15 16void __freadptrinc(FILE *f, size_t inc) 17{ 18 f->rpos += inc; 19} 20 21void __fseterr(FILE *f) 22{ 23 f->flags |= F_ERR; 24} 25