#include "stdio_impl.h"

size_t __freadahead(FILE* f) {
  return f->rend - f->rpos;
}

const char* __freadptr(FILE* f, size_t* sizep) {
  size_t size = f->rend - f->rpos;
  if (!size)
    return 0;
  *sizep = size;
  return (const char*)f->rpos;
}

void __freadptrinc(FILE* f, size_t inc) {
  f->rpos += inc;
}

void __fseterr(FILE* f) {
  f->flags |= F_ERR;
}